What will be the link to the development of the display market in 2022? In this context, the led-technic industry research center has cooperated with the core manufacturers of the LED display industry to conduct in-depth research. Next, let’s take a look at the specific situation.

Judging from the survey data, naked-eye 3D display will become the “top stream” of the LED display industry in 2021. Once the naked-eye 3D spaceship giant screen was unveiled, it not only attracted the attention of the public, but also received a large number of forward comments from the whole network. The top 5 real-time hot searches on Weibo, and the cumulative total hits reached 320 million.

It is worth mentioning that the project has a resolution of 8K and a total area of ​​888 square meters. Under the “dual-screen linkage” between the naked-eye 3D giant screen and the 450 square meters ultra-high-definition screen on the side, it has injected new vitality into the Chunxi Road business district.

Coincidentally, it is comparable to Chongqing’s “3788 Light of Asia” naked-eye 3D large screen, which is located in the center of the Guanyinqiao business district in Chongqing and is built around both sides of the Suning Tesco building. The ultra-high-definition LED display with a total area of ​​3788 square meters and a resolution of 8K is called “the first screen in Asia”. The entire display takes into account the architectural aesthetics and the business environment.

Among them, the naked-eye 3D project version 1.0 with the theme of “future city” and the naked-eye 3D version 2.0 version of “light rail through the building”, with its realistic stereoscopic visual effect combined with the super large ultra-high-definition screen, the shocking visual experience caused continuous cheers from the onlookers. With amazement, the number of related videos spread on the entire network exceeded 100 million, and more people knew about the giant screen in Chongqing. This large screen has thus become a new business card for the city of Chongqing.

In addition to the above-mentioned naked-eye 3D large screens, the naked-eye 3D displays built in first- and second-tier cities are also eye-catching, and they are frequently featured in the live broadcast studios of major celebrities and become the check-in place for urban Internet celebrities.

2021’s “big changes”

Glasses-free 3D displays have achieved huge changes in 2021, both in terms of quantity and area.

First, there has been a marked spike in numbers. According to the statistics of led-technic industry research center, as of the end of December 2021, there were close to 100 naked-eye 3D projects in the country, and maintained a rapid growth trend. Many LED display manufacturers even said that more projects will be launched in 2022.

In addition, in terms of area, naked-eye 3D has achieved an amazing breakthrough. Taking my country’s TOP20 display manufacturers as an example, many display manufacturers have achieved an area of ​​the order of 1,000 square meters, and some manufacturers have also achieved a breakthrough of 10,000 square meters.

From the perspective of the layout area, the landing of naked-eye 3D displays basically starts from first-tier cities, and a small number of them land in second- and third-tier cities, showing a point-line-surface development. And cities that can carry 3D LED displays are also cities with relatively strong economic vitality

How long can naked eye 3D last?

A series of figures and case scenarios show that: in 2021, naked-eye 3D is being promoted to a wider application platform and deeper technical scenarios, and has become a bullseye to promote the urban economy, attracting the participation of a large number of businesses and manufacturers.

Regarding the growth rate of glasses-free 3D in 2021, most manufacturers said that this is very in line with expectations. However, some manufacturers pointed out that although naked-eye 3D is popular, since the supervision and control of outdoor advertising will not be relaxed in 2021, the real projects are still limited. In addition, from the perspective of outdoor advertising screen projects, the period from planning to implementation is relatively long. The projects that will be implemented in 2021 only account for a part of them, and most projects will be implemented in 2022 or even 2023.

Summarize:

With the blooming of glasses-free 3D, there is no doubt that it will become the second growth curve of the display market in 2022. Commercial value, corporate technical strength, and policy support have become the three major drivers of naked-eye 3D. With the empowerment of technologies such as naked-eye 3D, the marketing value and commercial value of outdoor LED display have been further released. However, the industry needs to deeply think about the relationship between creativity, display screen and users, give full play to the advantages of technology, and avoid the phenomenon of popularity becoming a flash in the pan, in order to win a broader development space.

The post What is the trend of 3D LED display? appeared first on LED SCREE.

Compared with traditional display screen, the picture is more transparent and cool, with 3D effect and stronger sense of technology, which is very popular among users. So, how much does such a high-tech thing cost? Today, I will share with you the price of 3D LED display and the factors that affect the price of transparent screens, hoping to help friends in need.

First,How much is a 3D LED display per square meter:

Compared with traditional displays, 3D LED displays are currently more expensive. Usually the main factors affecting the price include model specifications, transparent screen lamp beads and other materials. At present, the price on the market is about 6000~12000 yuan/square meter. This is only the area of ​​the screen, other accessories are not included.

1. The 3D LED display screen accounts for about 60%, mainly because the accessories include power supply, power cord, box, cable, etc., more than that, the transparent screen lamp beads will have pixels, power, size and point spacing, etc. different, so there are different factors in the price.
2. The main supporting equipment and accessories of the transparent screen are computers, power distribution cabinets, and video processors (optional).
3. In the engineering part, screen structure, wiring, installation and debugging, etc.
4. A small part of the cost of logistics costs, control cards, packaging fees, etc.

In addition to the points mentioned above, it is necessary to tell you about several important factors that affect the price of LED transparent displays.

Second, the factors affecting the price of 3D LED display:

1. Don’t just look at the price when buying a transparent screen

Among many factors, price is often an important factor in the sales of 3D LED display screens. However, everyone understands that you get what you pay for, but before choosing, many will still prefer low prices, and products will often be ignored when there is a huge price difference. Quality, in the actual use process, the probability of many bad contacts, dead lights, and short circuits is greatly increased. This person’s after-sales problems will continue to receive feedback from customers, which is very time-consuming.

2. The same model is not necessarily the same product

In the sales process of 3D LED display, customers will encounter the same type of display, why your price is much more expensive than other companies, these are quoted to customers according to the company’s market channel price, these are formal The quotation shows that the quality and materials of the product are reliable. If the quotation is low, the possibility of the inferior materials of the product you use will be relatively large.

The use of unknown lamp bead brands will lead to color cast and dead lamp phenomenon, and the service life will be reduced. Greatly reduced, the use of unknown power supplies, low power efficiency, serious heat generation and other issues are all under consideration. led-technic is a manufacturer integrating LED display sales, manufacturing, processing, logistics and distribution. All prices are first-hand resources!

3. The higher the technical specification parameter value, the better

Many customers will compare the price and technical parameters of several 3D LED displays, and the technical parameters will be the winner, because the customer thinks that the higher the parameter value, the better the quality of the display.

For example, if the brightness of the customer is too high, it will be dazzling and affect the viewing. In terms of service life, it is easy to overdraw the life of the transparent screen in advance if the brightness is too high.

Therefore, reasonable brightness is the correct solution, not the higher the brightness, the better. And the high-brightness models are generally much more expensive. We must choose a reasonable product according to the actual use environment and purpose.

4. 3D LED display production and testing are not short enough

There are many customers who buy 3D LED display screens and must get the goods as soon as they place an order. In fact, it is wrong. However, after the production of 3D LED display screens, at least 48 hours of aging and lighting tests are required to troubleshoot color cast and dead lights. , make sure that the problem is solved before shipment.

The above is everything related to the price of 3D LED display. In addition, you should pay attention to the following points when purchasing transparent LED screens:

1. Place: Please explain the installation environment of the pre-made transparent screen: indoor or outdoor display, installed on the wall or hoisted.
2. Spacing size: Please specify the specifications of the transparent screen to be selected. If you are not sure, please contact our customer service.
3. The desired effect: Provide the viewing distance of the 3D LED display after installation.
4. Please indicate the area of ​​the transparent LED display to be made, and determine the specific length and width of the display. If you only know the approximate area, you can recommend that the conventional aspect size is made in 4:3 or 16:9 ratio, so that the aspect ratio of the screen is more coordinated and the display effect is perfect.

The post How much is a square 3D LED display screen? appeared first on LED SCREE.

Most of the LED displays are divided into indoor and outdoor, the use environment is different, the manufacturing cost is different, so the price will also be quite different. In a wider area outdoors.

If it is used indoors, it is generally used on a large stage, because the visual distance of P4 and P5 cannot be less than 4 meters. If you look too close, it is easy to see some small squares, and the whole effect will naturally be ineffective. Great.

If it is a close-up viewing, it is usually more suitable to use some small-pitch products. Most of the small-pitch products are between P1-P2, and the picture presented is more refined. It should be noted that P1-P2 does not mean that only P1 and There are two products of P2, but there are many different specifications in the middle, such as P1.25, P1.667, P1.875 and so on.

Having introduced so much, back to our P4 and P5 indoor full-color LED displays, the differences between them are reflected in many places, let’s talk about them one by one.

The meaning of P in the full-color LED display: P is the distance between any two pixels. For example: P3 means that the distance between pixels is 3mm, P4 is 4mm, P10 is 10mm, and the resolution and definition are different with different pixel pitches. The smaller the dot pitch, the higher the resolution and definition, so the smaller the dot pitch, the higher the price.

The pixel density of each square is different. P2.5 has 160,000 pixels per square meter, P3 has 111,111 pixels per square meter, P4 has 62,500 pixels per square meter, and P5 has 1 square meter. 40,000 pixels, P6 has 27,777 pixels per square meter, P7.62 has 17,222 pixels per square meter, P8 has 15,625 pixels per square meter, P10 has 10,000 pixels per square meter, and P12 has 1 square meter. There are 6.94.40 pixels, P16 has 3906 pixels per square meter, and P20 has 2500 pixels per square meter.

The difference between the P4 and P5 LED displays we introduced here is also the pixel pitch. The P4 pixel pitch is 4mm, and one square meter can accommodate 62,500 pixels. The P5 pixel pitch is 5mm, and one square meter can accommodate 40,000 pixels. pixels, the difference between the two is 22500 pixels.

Each pixel corresponds to the lamp beads in the LED display, so the corresponding P4 uses 22,500 more lamp beads than the P5. This is why the more pixels, the more delicate the display effect. And each additional lamp bead also means that the cost increases, so the corresponding price is naturally higher.

1. Pixel composition. Because it is an indoor technology, each pixel has a wick in red, green and blue, and the dot spacing is the basis for model distinction, which directly determines the pixel resolution that a single square meter of LED display can accommodate. The point spacing technology of the P4 model is indented by 1mm, and the pixel points are increased by more than 20,000 points. (In the field of high-definition LED electronic screens, each indentation of the dot pitch is a technological breakthrough)

2. The driving method determines the brightness of the screen. At the same time, because the P5 model has fewer pixels per square meter, the brightness is higher than that of the P4 LED full-color screen. This is due to the characteristics of the LED display screen. The larger the number of points of the display screen, the higher the brightness can be, and the same can be obtained, the smaller the number of points of the display screen, the lower the brightness.

This is because if the number of points is sparser, the power supply carries fewer LED lamp beads, and even if the brightness is increased, it will not affect the display screen. But the denser the number of points, if the brightness of the LED lamp is too high, then heat dissipation will be a big problem.

If it is in a semi-outdoor or indoor position by a window, you must choose a model with a higher brightness. There are many factors affecting power consumption. The reason why the P4 indoor full-color LED display consumes a lot of power is mainly determined by the characteristics of more pixels and a brightness greater than 2200cd per square meter.

Assuming the same distance of 5 meters, the P4 and P5 will not see much difference, but if the distance is a little closer, it can be seen that the P4 display has a higher resolution than the P5 display, but The price is relatively more expensive, and the choice of P4 or P5 display mainly depends on your display viewing distance and picture quality requirements.

A special summary of the difference between indoor full-color LED display P4 and P5: A few years ago, P5 LED display led the LED display to enter the field of indoor high-definition large-screen display. To achieve the ideal requirements of 1 square meter display screen. As mentioned earlier, the resolution of P4 is really high at 25,000 points per square meter. This technological breakthrough realizes the pursuit of the effect of 1 square meter of ultra-clear display, and the LED is approaching another ultra-clear field. This is the P3, P2.5 and other ultra-high-definition displays.

Main technical parameters of P4 and P5 models:

P4 LED Display:

• Pixel composition: P4
• Dot pitch pixel: 4mm
• Density: 62500 points/㎡
• Maximum brightness: ≥2400CD/㎡
• Drive mode: 1/16 scan
• Average power consumption: 580W
• Best viewing distance: 3~40M

P5 LED Display:

• Pixel composition: P5
• Dot pitch pixel: 5mm
• Density: 40000 points/㎡
• Maximum brightness: ≥3200CD/㎡
• Drive mode: 1/8 scan
• Average power consumption: 390W
• Best viewing distance: 5~60M

The post What are the differences between indoor full-color LED display P4 and P5? appeared first on LED SCREE.

The naked-eye 3D LED display is actually no need to wear other equipment to see a good three-dimensional effect. This is the naked-eye 3D display. However, you know? Facade and 3D screen are philosophically conflicting.

Stealth and appearance

The peculiarity of the 3D naked-eye screen is that there are many conflicts on it. In essence, it is the conflict between the two media, and to be specific, it is the relationship between the facade and the screen.

Tips: what is a facade?

Facade is a professional term in architecture, which is derived from French. It generally refers to the front of the outer wall of a building, and it can also refer to the side or back of a building.

The meaning of the facade

The war between facade and screen has a long history, and most of the time, it ends with screen siege. When the screen replaces the traditional facade and becomes the appearance of the building, can we think that the “facade” is becoming invisible?

On the surface, the physical façade of the building remains, it becomes a screen, but its invisibility represents the retreat of part of the decorative aesthetic and practical function, and at a deeper level, it also symbolizes part of the architectural significance , it can no longer speak for the building, or even transmit information.

When the relationship between the information presented by the façade and the building itself becomes increasingly thin, we are forced to lose the ability to read the building from the outside. If we cannot read the building in this way, the information presented by the building will remain What? So what can the façade become?

· Facade spatialization

It would be too superficial to just say that the façade has become a screen. The definition of the screen should be in the era of two-dimensional screens. In the face of 3D naked-eye screens, we can put forward a new statement-spatialization.

Different from the traditional two-dimensional screen, the three-dimensional screen has added a deliberate design in addition to the 3D naked-eye technology. Operations such as out of the frame and creating a sense of depth are just some tricks. The real highlight is the sense of space presented by the screen.

The sense of space is an important prerequisite for the above-mentioned “creating a sense of non-daily life in everyday life”.

From two-dimensional to three-dimensional, it involves the transformation of people’s viewing mentality and viewing thinking. In the experience, 3D occupies an absolute advantage. The cooperation of screen, technology and video creates a sense of space and out-of-frame. Space makes it possible for stories to happen, and out-of-frame seems to exist between the world on the screen and the real world. A brief interface where virtual and reality meet at a certain moment.

· Spatial dynamism

Facade dynamization is a derivative of façade spatialization.

Different from the previous 2D dynamic façade, the 3D screen façade has to move. The façade dynamization and façade spatialization complement each other. The 3D effect of the naked-eye 3D screen is not very obvious when the naked eye 3D screen is stationary. 3D screen technology still needs an optimal viewing position. The viewing position cannot be changed, and the presented content must be moved to obtain a better 3D experience.

From another level, it is inevitable for the facade to become dynamic. From the classical aesthetic facade of the past to the modernist mechanical aesthetics, to the poster pictures and electronic screens later, the static material beauty of the building is gradually replaced by the dynamic virtual vision. feeling replaced.

· Facade stage

When the façade is dynamic, there are more possibilities. Let’s take a look at the example of a cat.

In July last year, a huge three-flowered cat lived in an advertising screen on the streets of Shinjuku, Tokyo. It is nearly 10 meters long. It may be because its size is so large that its “residence” appears slightly cramped. The body is always slightly out of the frame. It also dozed frequently, always slipped, and as a cat, its balance was always away from home. When it’s bored, it slumps down and stares ahead, stands up and sticks its head out when tired, and yawns when it’s dark.

When the popularity of this cat was at its highest, the number of tourists on the streets of Shinjuku surged, and the audience’s mobile phone cameras followed the cat’s movement direction. Some people would spend a day on the streets of Shinjuku to watch the cat’s cuteness, and some people specifically followed the cat’s eyes. Orientation, people and cats like a real sense of sight.

So if we interpret it from this perspective, what are we really looking at? We are clearly looking at the “facade”, but it is not a “facade”, which can no longer be called the traditional “facade”, and perhaps it should be changed to a more appropriate word – stage. The building is like a stage inserted from the outside, the tourists in the city become the audience, and the content on the screen becomes the narrative on the stage.

The screen on the building facade, the surrounding of the building, and the crowd of onlookers together constitute a specific scene. In this scene, a part of the building infiltrates the life of the city in the name of interaction, and the crowd of onlookers further completes the process of interaction. The three become complementary existences to each other.

【future】

· Audience

There is no doubt that the 3D naked-eye screen can go to the public must be a historical reason. Whether it’s a technology that started ten years ago or the high demand for screens and content in today’s economic development, these are naturally indispensable. But I think that behind the explosion of 3D naked-eye screens, the essence is to present the fundamental needs of people – we are destined to move towards a clearer, more diverse, and more interactive future.

If we focus on the perspective of virtual experience, it is not difficult to find that the 3D screen is just the beginning, and it may only be the first step for virtual experience to reach the public. This kind of large-scale virtual experience is naturally not as rich, delicate, and comfortable as the small-scale virtual experience, and it even seems to be slightly “self-depreciating”.

And this is indeed a good sign, for the viewer, for the creator, it is like a window. This window spans between reality and virtuality. Outside reality and within imagination, its own form provides a greater possibility, making the creation of a small world at the virtual level more “real” and “reasonable”. “. When we face this window, illusion and reality are intertwined, and at that moment we jump out of reality.

The post What is naked-eye 3D LED display? appeared first on LED SCREE.

According to the internal analysis report of LED industry data, the naked-eye 3D display screen has gradually become popular in recent years, and once attracted major Internet celebrities and tourists to check in. At the peak, it reached more than 100 million on social platforms in mainland China. , which means that more than 1 in 10 people in China have heard or seen this term.

It is precisely because of this that “naked eye 3D” has quickly become a favorite product of LED manufacturers. From the previous 0.05% productivity to the current 12%, it can be seen that advertising manufacturers have also seen the value of naked eye 3D LED displays. Increased distribution.

All the amazing display effects are inseparable from the technical support behind it. The following will reveal the working principle of the 3D LED display.

How is the 3D effect achieved?

As we all know, the brain is an extremely complex nervous system. What we see with the naked eye can be flat or three-dimensional, because the two eyeballs of a person will see the same object through the distance between the eyes It is this subtle difference that allows the brain to convert the spatial coordinates between objects in the direction in which the line of sight disappears. Through this feeling, the distance and size of the objects can be distinguished, forming a three-dimensional sense, that is, Three-dimensional sense of space.

Amazingly, if we don’t stare at something or focus on the nose, our brain automatically ignores the presence of the nose. This strange phenomenon is called “saccade inhibition” and was accidentally discovered by scientists Erdmann and Dodge in 1898.

Saccade suppression is that the brain automatically filters out what looks blurry, so not only the nose, but also some pictures when we usually glance quickly will be filtered out.

According to scientists’ statistics, every time our eyeballs move quickly, the blurry picture will last for about 50 milliseconds. If we add up the time of “saccade suppression” in a day, it will be nearly 40 minutes.

Why is the brain so considerate, and it actually actively helps us filter the picture?

This is because the blurry visual information produced when the eyeballs move quickly can cause us to feel dizzy. The brain is worried that you will not accept it, so it turns on the automatic filtering function, and gives you a comfortable and bright world in front of you.

The brain can always magically create a lot of things for us, and under such conditions, it will naturally give birth to many magical functions. For example, when we go to the cinema to watch 3D movies, we need to wear this kind of superimposed red and blue colors. ‘s lenses.

However, in most cases of this kind of lens, it only makes the fonts into 3D, and most of the films will not have any special 3D effects. Therefore, the display screen needs to achieve the effect of naked eye 3D. In terms of technology and cost, it is better than wearing 3D glasses in the theater. The easy way is much harder.

In fact, most of the current LED large screen to achieve naked-eye 3D is a three-dimensional effect outlined by the distance, size, shadow effect and perspective relationship of the object in the two-dimensional picture. Just like we see some sketches, they are obviously flat, but they also have a three-dimensional effect.

Although static 3D and dynamic 3D are not the same, so how to make the plane animation produce 3D effect, this is the question we have to think about?

Through continuous practice, it is found that as long as the reference object is used well, the 3D effect can be well realized. The “3D wave screen” of the SM building, which amazes the whole network as soon as it debuts, uses the shadow of the background as a static stereo reference line, and uses the parallax of the eyes to form a 3D illusion, so that the moving waves have a feeling of breaking through the screen.

However, have you noticed that the 3D screens that have become popular recently are composed of two surfaces with different angles. The display screen folds the screen 90°, using video material that conforms to the principle of perspective, the left screen shows the left view of the image, and the right screen shows the main view of the image. When people stand in front of the corner and watch, they can see the object at the same time. Side and front, showing a realistic three-dimensional effect.

Here we have to say something about the slightly deeper principles of the 3D LED display.

When the signal module provides a changing current signal for the magnetic field device, the magnetic field device will generate a changing magnetic field corresponding to the adjacent changing current signal, and the changing frequency of the magnetic field will be synchronized with the refresh frequency of the left and right eyes of the LED display. .

The rotation of the magnetic field reaches the direction of the plane of polarization of the linearly polarized light emitted by the LED display screen, so that the direction of the plane of polarization of the linearly polarized light after the rotation is parallel to the direction of the plane of polarization of the linearly polarized light before the rotation and perpendicular to the direction of the plane of polarization of the linearly polarized light before the rotation. Switching back and forth between the orientations of the plane of polarization of linearly polarized light.

Through this slightly deeper 3D principle, we have a further understanding of the display of 3D LED technology. Of course, in addition to technology, it is also essential in supporting hardware.

Indispensable high-quality lamp beads: REESTAR

Many 3D LED displays use the high-end brand REESTAR series products manufactured by the National Star RGB Super Division as the core display device. The high refresh rate, high grayscale, high dynamic contrast ratio, smooth transition of curved surface/corner, the production level of video material, etc., and Nationstar has also applied for more than 30 patents for it, which shows its profound technical strength.

It is precisely because of the use of such products that the displayed picture quality is delicate, the color is gorgeous, and it also has the characteristics of high brightness, long life, long warranty, etc. Excellent performance, thus presenting a great visual effect to the audience.

The post How do 3D screens work? appeared first on LED SCREE.

1. Classification of LED display types

1.1 Classification by usage environment

According to the use environment, it can be divided into indoor LED display and outdoor LED display. Indoor LED display is characterized by large viewing angle, moderate screen brightness, high density, light weight, suitable for close viewing; outdoor LED display is characterized by long color mixing time, high screen brightness, waterproof and anti-ultraviolet.

1.2 Classification by display function

According to the display mode, a function can be divided into graphic LED display, video LED display and digital display. The function of the graphic LED display screen, as the name suggests, is to display pictures, text information, online and offline display; the video LED display function can display real-time, video, video and other 2D or 3D video information; digital display equipment It is a 7-segment digital tube, Mainly used to display digital electronic screens, electronic clocks and so on.

1.3 Classification by display color

According to the display mode, the color can be divided into single-color display, double-color display, full-color display. The single-color LED display is composed of single-color LEDs and can only display one color; the two-color LED display is composed of red and green LED lights; the 256-level two-color LED display can display 65,536 colors; the full-color display is composed of red and green LEDs. , green, blue three-color LED composition, 256-level full-color LED display up to 16777216 colors.

1.4 Classification by Display

Press display can be divided into page display, horizontal scrolling, static and vertical scrolling.

1.5 Classification by Control Mode

According to the control mode, it can be divided into synchronous mode and asynchronous mode. The synchronous display mode is equivalent to the LED display as the monitor of the computer, and the multi-gray display capability is realized by mapping the mapped computer image on the monitor; the asynchronous display mode utilizes the storage function and automatic playback function of the LED display. On the computer, the edited text and pictures will be transferred to the LED display, and the LED display will play automatically. This method is often used to display textual information because it lacks the ability to display multiple levels of grayscale.

2. LED display design

2.1 LED display design principles

The principles that LED displays should consider include: reliability, compatibility, practicability, cost-effectiveness, etc. In terms of reliability, the effect that needs to be achieved is that the software and hardware of the entire system can run stably to ensure that no defects are displayed on the daily information display screen, and the progress is smooth; compatibility mainly means that the system can normally access the computer and various video signals. Normal display of network content; practicability mainly refers to being suitable for various conditions and meeting the requirements of graphic information, video, and official document display information.

2.2 LED display design

2.2.1 Design of Display Drive Circuit

The display driver circuit is generally located behind the display screen as a PUB board. The display drive circuit controls the information that needs to be displayed, and can display the display screen according to certain timing and rules; and provides the corresponding driving current and level for the light-emitting diodes on the circuit board, so that the display screen can display data, patterns, and videos as needed. Wait. text and other content.

The design idea of ​​the display driving circuit is to use “line lighting, column scanning”, that is, placing light-emitting diodes on the dot matrix module where the column lines and the row lines intersect. The connection mode between modules is determined by the scan mode. Scanning modes are divided into 1/16, 1/8, 1/4, 1/2, 1/1 and so on. The meaning of 1/16 is to refresh one row at a time, one scan period is 16, and the control signal needs four ABCD; 1/8 is to refresh one row at a time, one scan period is 8, and the control signal needs ABC; analogy can get 1/4, 1/2, 1/1 scan period and control signal. The 1/16 scan brightness is higher than 1/8, so the scan is generally 1/4 under strong light, and the 1/16 scan is generally used indoors.

Selecting the driver circuit chip is also a very important task. Driver circuit chips can generally be divided into amplifying chips, decoding chips, line driver tubes, LED driver chips, etc. The principle of selecting a power amplifier chip is to increase the power of the control signal and amplify the power due to too many cascaded display modules.

The general choice is 74HC245; the principle of choosing the decoding chip is: serial transmission is required. Signal decoding, so that the optical signal is transmitted to the display template, generally choose 74HC138; the principle of selecting the driving tube is to choose the high-current action driving of the display line. It is generally 4953; the principle of selecting an LED driver chip is to select a suitable LED driver chip to provide sufficient current and matching level for the LED. The model number is usually 74HC595 8-bit, A6282 16-bit, or TB62726.

The PCB design principle is to install matching solder holes on the front side of the PCB. It is a combination of PCB and display

2.2.2 Design of Display Panel

The display panel relies on many independent dot matrix display modules and is further spliced. Each dot matrix display module consists of multiple light-emitting points. In a monochrome dot matrix display module, each light-emitting point generally corresponds to a light-emitting diode; in a color dot-matrix display module, each light-emitting point has a more complex composition, which can be composed of light-emitting diodes of different colors. After different light-emitting diodes are lit, the light-emitting points will appear different. The color of light is pixels, and the higher the pixels, the more pixels the display panel has, and the higher the display resolution.

In the room, the display screen generally adopts 8*8 display module. Another way is to say that the pixel density is 64 pixels. Outdoors, the dot matrix display module used on the display screen is not fixed, and the materials used are flexible. Generally speaking, it can be customized according to the user’s needs, or you can choose the appropriate brightness and color that the designer needs.

2.2.3 Controlling the computer The core of the display system is the control of the computer. The designer controls the computer and transmits the numbers, images, text, video and other information to be displayed to the display circuit, and can provide control ideas. The control signals sent by the control computer generally include EN enable signal, CLK clock signal, STB latch signal, RI data signal and ABCD line signal.

The EN enable signal can be used to control signals across the screen. It can also blank the display and adjust the appropriate duty cycle by changing the EN enable signal.

The STB latch signal is used to transfer the data in the register to the latch and then display the data through the driver circuit. However, since the driver circuit is controlled by the enable signal, the lighting must be turned on. In state, the latch signal also needs to be coordinated with the clock signal to display a pleasing image;

The RI data signal can provide the required transmission data for the display. It works by coordinating with the clock signal. The data is then transferred to the display point to be displayed. When the data are not equal, the corresponding color display will be abnormal;

The ABCD line signal exists in the dynamic scan phase. ABCD means four binary lines. The ABCD signal has four lines of 16 lines each, the ABC has three lines, eight lines, and so on.

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Although LED displays have penetrated into all aspects of life, there are not many people who can tell what LED displays are, so let’s learn together.

What is LED display?

The LED display is a flat display, which is made up of LED modules spliced ​​together. Although the “naked eye 3D LED display” has appeared on the market, it is still flat in terms of structure, and only uses visual deception, so it looks like a 3D effect. If you are interested, you can click the following:

How do 3D LED screens work?

Why is it called LED and not some other name?

This is because LED is a diode semiconductor light-emitting lamp made by controlling compounds of gallium, arsenic, phosphorus, nitrogen, and indium, so LED is actually an abbreviation for light-emitting diode.

Controlling different compounds can produce different colors of light, gallium arsenide phosphide diodes emit red light, gallium phosphide diodes emit green light, silicon carbide diodes emit yellow light, and indium gallium nitride diodes emit blue light.

When it comes to the LED display, we can easily think of the LCD which is very close to it, so what is the difference between the two?

The main working principle of the display

The LED display is usually composed of a main controller, a scanning board, a display control unit and an LED display body. The main controller obtains the brightness data of each pixel of a screen from the computer display card, and then assigns it to several scanning boards. The board is responsible for controlling several rows (columns) on the LED display screen, and the LED display signals on each row (column) are cascaded and transmitted through each display control unit in the row in a serial manner, and each display control unit directly faces the LED display body. The work of the main controller is to convert the signal of the computer display card into the data and control signal format required by the LED display screen.

The function of the display control unit is similar to that of the image display screen, which is generally composed of a shift register latch with a grayscale control function. It’s just that the scale of video LED displays tends to be larger, so an integrated circuit with a larger integration scale should be used.

The function of the scanning switch is the so-called link between the previous and the next. On the one hand, it accepts the video signal of the main controller, on the other hand, it transmits the data belonging to this level to its own display control units, and at the same time, it also sends the data that does not belong to this level downward. A cascaded scan pull transmission. The differences in space, time, sequence and other aspects of video signal and LED display data need to be coordinated by a scanning board.

The difference between LED display and LCD display

There are actually quite big differences between LED displays and LCD displays, which are mainly reflected in the following aspects:

1. The light source is different

The LCD display uses a CCFL light source, and the LED display uses an LED light source.

2. Unlimited stitching

Because the LED display screen is composed of LED modules, as long as there is enough money, LEDs can be spliced ​​with LED modules in unlimited space, while the general LCD can only make corresponding specifications according to the corresponding size, even if It can be spliced ​​or only a small amount of splicing is not comparable to LED.

3. Seamless stitching

The LED display can be seamlessly and infinitely spliced, and although it can be barely spliced ​​together, there will be an irremovable border around it. Even if some LCD manufacturers use LED sewing methods, there is no way to seamlessly splicing LEDs compared.

4. Stereo effect

LED display screen can make some videos produce 3D effect through special splicing method, while LCD can only be played on a flat surface, and there is no way to perform special splicing.

5. Alien structure

The LED display screen can not only splicing a three-dimensional effect by special methods, but also can splicing various special shapes, such as spherical, heart-shaped, pentagon and other special shapes, can be spliced ​​out, while the LCD can only be square or rectangle, There is no way to splicing it into other shapes.

What are the advantages of led display?

1. The luminous brightness is strong, even if the sun shines directly on the surface of the screen, the content displayed is clearly visible.
2. Super grayscale control With 1024-4096 grayscale control, the display color is above 16700000, the color is clear and vivid, and the three-dimensional sense is strong.
3. Static scanning technology, using static latch scanning mode, high-power drive, fully guarantees the fineness of the picture.
4. It can be matched with a light sensor to realize the function of automatic brightness adjustment. It can get the best playback effect in any environment.
5. Using imported large-scale integrated circuits, the safety is greatly improved, and it is convenient for daily maintenance and debugging.
6. Advanced digital video processing, distributed scanning technology, high-definition display with BSV liquid crystal splicing technology, modular design/constant current static drive, ultra-bright pure color pixels, clear image, no jitter and ghosting, and no distortion.
7. Various information such as video, animation, chart, text, picture, document can be displayed.
8. It can be controlled remotely, and the content can be changed at will, and it is fast.

The above is the introduction of “what is an LED display”. There are still many applications of display in our daily life. It can not only decorate the storefront, but also better promote the product. Shopping malls, hotels, high-speed railways, subways, cinemas, exhibitions, office buildings, etc., the target customers have strong spending power and huge advertising value.

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So, what are the well-known brands of LED displays? Let’s take a look and see if there are any brands you are familiar with.

Top 10 LED display companies in 2022 (in no particular order, with gross profit margin)

• Leyard (40.48%)
• Shanghai Sansi (28.65%)
• Lianjian Optoelectronics (36.08%)
• Alto (38.10%)
• HOLA-LED(28.75%)
• Lope (31.78%)
• Unilumin Technology (29.52%)
• Abison (36.37%)
• JYLED (33.78%)
• Ledman Optoelectronics (30.07%)

Sources of the above data: public annual reports, third-party information, news reports, expert interviews and QYR analysis and research,

When the data was adopted: November 2018

The information published above may only be a rough estimate, but it is also a side reaction. The bigger a product is, the higher its popularity will be, and the more expensive the price will be. This is similar to luxury products, although luxury products require more Much exaggerated.

In addition, we also obtained a market strategy plan for the next ten years from major LED displays from some public channels.

Liard

1. Dedicated to the research and development of small pitch, in order to replace the commercial market of projection and LCD wall, and explore the personal consumption market, such as the cinema market and the large TV home market.

2. Leyard only accounts for about 10% of the market in the night travel economy. The next step is to expand the market to more than 700 prefecture-level cities, more than 2,000 county towns and more towns across the country.

Unilumin Technology

1. Adopt a flexible sales model that focuses on distribution and supplements direct sales

2. Expansion of application fields, in addition to common control rooms, shopping malls, education, corporate conference rooms and other fields, Unilumin also plans to introduce 3D LED displays into the cinema market

3. In terms of business model: the company provides customers with a package of services on light environment management, including lighting design, construction, installation, operation, maintenance, etc.

Lianjian Optoelectronics

Subsidiaries in the digital marketing segment continued to complement each other in terms of business and superior capabilities to achieve cross-selling and repeated development of customer groups. On the one hand, expand more high-quality online media resources, such as reaching strategic cooperation with Tencent social advertising, etc., and use the powerful marketing service team of Lima, Accurate Focus and a large number of customer resources in the digital marketing sector to expand market share and sales scale.

On the other hand, through network collaboration and data accumulation, gradually build a big data intelligent marketing platform, and complete the first phase of work in 2018, including accumulating its own data, developing an outdoor advertising platform, and completing online media delivery through the outdoor advertising platform.

In the digital outdoor sector, on the one hand, the original outdoor advertising business of each subsidiary has realized the networking, labeling and dataization of existing outdoor media resources through technology and business model innovation, and actively expanded consumption scenarios such as high-speed rail, shopping malls, and scenic spots. media resources.

On the other hand, outdoor subsidiaries are actively extending from offline to online, taking advantage of the opportunity of cooperation between the Group and Tencent social advertising and other high-quality online media to increase Internet advertising business on the basis of traditional outdoor big-name large-screen advertising, providing customers with online advertising services. Online and offline integrated marketing services.

Absen

Accelerate the layout of various overseas fields, including the expansion of the overseas hotel trial operation business, and increase the layout in cities with a high proportion of overseas sales. Such as adding franchised stores and technical support services. Combined with 5G cloud services, Get through the integrated operation strategy, so as to realize the comprehensive coverage of the whole network with multi-channel, multi-site and multi-channel.

HOLA-LED

On the basis of summarizing multiple sales strategies in previous years, the company has increased the strategic synergy of each business unit of LED application, and effectively improved the conversion rate of internal resources, thereby better enhancing the overall profitability of the business sector.

The company will actively and effectively adopt a large-scale marketing strategy, focusing on strengthening the construction of overseas service platforms, and recruiting excellent marketing service talents around the world. At the same time, upgrade the company’s high-density LED display products, relying on its own advantages in the LED display control system, increase the expansion of the outdoor high-density LED product market, thereby increasing the market share.

Lehman shares

Continue to pay attention to exploring the development opportunities of the sports industry, integrate the advantageous resources of the industrial chain, optimize and upgrade the strategic layout of the sports industry. Diversify and change the existing LED display screen, enter the world with the highest quality and the lowest price, so as to obtain more many markets.

JYLED

(1) The company will pay close attention to the domestic macroeconomic situation and policy changes, adjust domestic marketing strategies in a timely manner, expand domestic sales channels, and minimize the risks that the domestic market may face.

(2) The company will continue to innovate in response to the needs of the domestic market. Keep improving in technology, win with technology and win with product quality. Use better products and better services to meet the severe domestic market challenges.

Alto Electronics

In the future, the company will still implement two lines in parallel, that is, domestic and foreign development at the same time, and plans to increase dealer agents in many foreign cities to further expand the international market share. The domestic market will continue to intensively cultivate and lease series of products to ensure profit growth. A stable premise for the development of the company.

Sources of the above data: public annual reports, third-party information, news reports, expert interviews and QYR analysis and research,

When the data was adopted: November 2018

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Until 2017, engineers with LED displays came up with a whim, and hollowed out the light panels, which looked like shutters from the outside. In this way, when there is no plug in, it will not completely affect the display of products. After the power is turned on, not only the image can be displayed, but also the scene on the back can be seen through the image, which is very sci-fi.

However, at that time, technology was just emerging, and products that could reach 35% permeability were already very good. Because of the shape like a fence, it was also called grid screen, grid screen.

For friends who don’t know much about LED transparent display, it is always easy to confuse “transparent display” with “transparent glass display”. In fact, these two displays are completely different products. Next, I will explain to you what is LED transparent screen.

The LED transparent display is to make the LED display transparent, from the original opaque, to optimize the LED display to be transparent when we observe it from certain angles. Because the light panel and structure are reduced to people’s line of sight occluded, so you can see the scene behind the display clearly. Therefore, the content to be played is made three-dimensional, making people feel like an object suspended in the air, and it is also convenient for people to observe the objects behind the screen, which is widely used in shop windows.

How to realize LED transparent display?

There are two specific implementation methods of LED transparent display in the industry:

Method 1: By adding a hollow design to the traditional LED display, and then matching the new patch, driving circuit, control system and new module structure, the optimization and innovation of the transparent LED display can be realized.

Method 2: It is formed by splicing light bars, with a special structure and signal processing method. Some of them use LED lamp beads to emit light from the side, so that the LED transparent display screen can be viewed from the front, and the side area of ​​the light bar that blocks the line of sight is less and more transparent.

The front-illuminated LED transparent display is not as transparent as the side-illuminated display. However, when viewed from above or below, the transparency is better than that of the light-emitting module (the display screen is viewed from different angles, and the occlusion area is different).

Some manufacturers, in order to meet the requirements of outdoor use such as waterproof and anti-UV, have added waterproof treatment such as glue filling of lamp panels and structural sealing.

In addition to being confused with the LED glass screen, it is often confused with the LCD transparent screen, but in fact the two are still very different.

In terms of clarity, LCD transparent displays are often clearer than LED transparent displays. It is only because of the two fatal shortcomings that LCD has always had, which leads to its use in a narrower scene.

These two disadvantages are that unlimited splicing and seamless splicing are not possible, because LCD always needs a frame to wrap, so there will be a black frame around the thin LCD screen. The impact is greater.

From this point of view, LCD display or LCD transparent display is suitable for small and exquisite products. In the field of infinite splicing, LCD is still relatively powerless.

The difference is that the LED transparent display has no black frame after splicing, and for conditions that do not require close viewing, such as outdoor or indoor large-area partition walls, this is also due to its low pixels.

The principle of transparency should be understood by those who have seen the blinds. It is to open the distance between the pixels and leave a neutral space so that you can see the back. As for how to leave a neutral space and how to fix it, two commonly used ones have been introduced above. Methods.

A simple summary of the application scenarios and constraints of LED transparent screens is that the pixel requirements are not high, and it is definitely the right choice for outdoor use. Some customers have been curious before, why not just make the LCD bigger, even if there is a small amount of borders, it doesn’t matter, can’t it be bigger?

In fact, this has a lot to do with the technology and transportation of the LCD screen. In addition to the different display technologies just mentioned, there are also big problems in the transportation of the oversized LCD screen.

Because the LED display is spliced ​​with a single box and a single box, and the LCD display to achieve the corresponding display effect, either endure the black edge of each splicing part, or make the screen larger, and make it bigger and bigger. It will bring installation and construction problems.

Taken together, LCD and LED are originally in different directions. One is a world of infinite possibilities, and the other is a small and beautiful world. Both have their own areas of expertise. There is no need to force yourself into unnecessary places.

Five problems that need to be solved for transparent LED display

(1) The dilemma between permeability and dot spacing From the perspective of several products on the market, the transparency of the transparent screen has reached a maximum of 85%, and the minimum dot spacing is 3mm. For the transparent screen, has its permeability and dot spacing reached the limit?

In fact, it is not, because the PCB board, driver IC, and lamp beads themselves are opaque. If the dot pitch is made smaller, it must be at the expense of losing a part of the permeability, and high permeability is just transparent. The biggest advantage of the screen is; and the price of improving the transparency is the expansion of the dot spacing, which affects the clarity and display effect of its screen. Therefore, it is a dilemma.

(2) Questions about after-sales service, product maintenance convenience and product reliability. First of all, the side-emitting LED lamp beads used in the transparent LED display on the market are not versatile, consistent and stable, resulting in high production costs and troublesome after-sales service. Secondly, there are many customized products on the market, and the quantity is small, and it is difficult to mass-produce, which is also an important reason for the high cost of LED transparent screens.

(3) How to achieve “true transparency” The so-called “true transparency” means that the transparent screen must be truly integrated with the glass structure.

(4) Problems of standardization and customization Standardization can reduce costs, and customization can make transparent screens and buildings achieve a high degree of harmony.

(5) The problem of light transmission on the back of the transparent screen When advertising is played on this screen, when designing the content screen of the advertisement, the unnecessary background color should be removed and replaced with black, and only the content to be expressed should be displayed and played. When the black part does not emit light, it is a transparent effect. This playback method can greatly reduce light pollution.

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The LCD transparent display is mainly divided into two parts, the panel and the backlight panel. The screen forming part is mainly divided into a pixel layer, a liquid crystal layer, and an electrode layer (abbreviated as TFT).

Regarding the principle of transparent LCD screen, we must talk about the principle of screen formation. The logic board sends the image signal from the signal board, and after the logic operation is performed, the output controls the TFT switch, that is, the flipping action of the liquid crystal molecules, which is used to control whether the light source can pass through, showing the corresponding pixels, and forming a color that allows people to see screen.

“Principle and composition of transparent liquid crystal display”

The LCD screen is a display device based on the liquid crystal electro-optic effect. It includes character segment display device in segment display mode; character, graphic and image display device in matrix display mode; large-screen LCD projection TV LCD screen in matrix display mode, etc. The liquid crystal screen uses the physical properties of liquid crystal molecules to change the distribution of liquid crystal molecules under the influence of current and voltage, thereby changing the strength of the light source.

Technically speaking, the LCD panel consists of two pieces of sodium-free glass material with a layer of liquid crystal sandwiched in between. Liquid crystal substances are composed of long rod-shaped molecules and belong to organic complexes. In the natural state, the long axes of these liquid crystal molecules are approximately parallel. The liquid crystal is poured into a slotted plane, and the liquid crystal molecules are distributed in parallel in the slot. When light passes through, the liquid crystals will take on different shapes, thus blocking or transmitting light.

Transparent displays using LCD displays are all layered structures composed of different parts. The LCD consists of two glass plates, about 1 mm thick, separated by a uniform interval of 5 μm containing the liquid crystal material. Because the liquid crystal material itself does not emit light, there are lamps on both sides of the display screen as light sources, and there is a backlight plate (or uniform light plate) and a reflective film on the back of the liquid crystal display screen to provide a uniform backlight source.

When illuminated by the light source, the light is first transmitted upward through the lower polarizer, and is conducted by liquid crystal molecules. Since the electrodes of the upper and lower interlayers are changed to FET electrodes and common electrodes, when the FET electrodes are turned on, the arrangement state of the liquid crystal molecules will change, and the purpose of display is achieved by shading and transmitting light.

But the difference is that, due to the capacitive effect of the FET transistor, it can maintain the potential state, and the liquid crystal molecules that had previously transmitted light will remain in this state until the FET electrode is recharged next time to change its arrangement.

At present, most transparent liquid crystal screens use backlight to pass through the liquid crystal panel. Under the action of the electric field, the arrangement of liquid crystal molecules changes, which affects the change of light passing through it. , so as to achieve the purpose of displaying the image.

We know the light transmission principle of the transparent LCD screen. Since the liquid crystal material itself does not emit light, it is necessary to provide a light source. Therefore, there are light sources on both sides of the display screen. The plate is composed of fluorescent substances, which can emit light, and its main function is to provide a uniform background light source.

Many times, we often confuse LCD transparent display and LED transparent display. In fact, the two are still very different.

The LCD transparent display is often clearer than the LED transparent display. However, LCD has always had two fatal shortcomings, that is, it cannot be unlimited splicing and seamless splicing. Because of the special light-emitting form of LCD, it needs a frame to wrap it. Therefore, regardless of the thin LCD screen, it is inevitable that there will be a frame of a few tenths of a millimeter.

As the area of ​​splicing increases, the impact of the frame is also greater. From this point of view, LCD display or LCD transparent display is suitable for small and exquisite products. In the field of infinite splicing, LCD is also Powerless.

LED transparent screens are mainly used in conditions that do not require close viewing, such as outdoors or indoor large-area partition walls, which is also due to its low pixels. The principle of transparency should be understood by those who have seen the blinds. It is to widen the distance between the pixels and leave a gap so that you can see the back. As for how to leave a gap and how to fix it, each has its own method. .

A simple summary of the application scenarios and constraints of LED transparent screens is that the pixel requirements are not high, and it is definitely the right choice for outdoor use. Some customers have been curious before, why not just make the LCD bigger, even if there is a small amount of borders, it doesn’t matter, can’t it be bigger?

In fact, this has a lot to do with the technology and transportation of the LCD screen. In addition to the different display technologies just mentioned, there are also big problems in the transportation of the oversized LCD screen.

Because the LED display is spliced ​​with a single box and a single box, and the LCD display to achieve the corresponding display effect, either endure the black edge of each splicing part, or make the screen larger.

No matter which one it is, it greatly restricts the LCD. After all, if the volume becomes larger, the volume and weight during transportation will cause the freight to rise sharply, and it will also require a lot of manpower and material resources during installation and use.

Taken together, LCD and LED are originally in different directions. One is a world of infinite possibilities, and the other is a small and beautiful world. Both have their own areas of expertise. There is no need to force yourself into unnecessary places.

And if a commodity occupies all the dominant positions and forms a monopoly, then the price is determined by the manufacturer, and if you want to increase the price, you can increase the price. Even if you are not satisfied, there is nothing you can do. This is the case with our common gasoline, if there is no electric car , if you can’t afford to buy gasoline, then you can’t drive.

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