As a strategic emerging industry, the LED industry has very good prospects. With the development of the industry, the LED industry is currently in a stage of resource integration. For the LED display industry, the full-color LED display is an important development part of the LED industry, with advantages such as large screen, high brightness, high protection level, and high weather resistance. Features. At present, in terms of outdoor large-screen display, full-color LED display currently has no market for alternative products. It can obtain advantageous applications in many fields. In addition to outdoor billboards, on stage settings, building lighting, There will also be very large applications for information release in public places, etc. As prices drop, applications will become wider and wider. At the same time, as the prices of chips and packages further decline, the full-color LED display market will also develop better, mainly reflected in the following ten points:
1. Large screen
The rise and development of full-color LED display screens provide the basis and appeal for the oversize of screens. At present, some specific markets, such as large advertising circles and large playgrounds, are vigorously constructing large-area LED displays in order to attract more attention from advertising owners and audiences.
The world's largest LED display screen is always setting records. According to statistics, there are currently seven classic cases of large-area LED full-color screens in the world. First, the Beijing Water Cube. This is the world's largest LED display building with a total area of ​​12,000 square meters. This work has attracted worldwide attention as soon as it came out. Second, Guangzhou Haixinsha Fengfan LED display. This important design for the opening and closing ceremonies of the 2010 Asian Games in Guangzhou is the most representative work of the mobile LED display in the world. It is the highest technology combined with high-tech full control and covers a total area of ​​8,000 square meters. Third, Suzhou Yuanrong Times Square. Known as the world's first LED canopy, with a total length of 500 meters, it is currently the longest known LED canopy in the world. It covers an area of ​​7,500 square meters and is located in the Times Square of Suzhou Industrial Park, thus becoming a new landmark in Suzhou. . Fourth, Las Vegas Sky Street. With a length of 400 meters and an area of ​​more than 6,000 square meters, it is one of the most prosperous areas in the area. Fifth, Beijing World Trade Center Sky Screen. One of Beijing's commercial centers, 250 meters long, covering an area of ​​6,000 square meters. Sixth, Chengdu Global Center Ocean Park. This is the latest project of indoor LED display, covering an area of ​​4,080 square meters, and is currently the king of indoor full-color LED display in the world. Seventh, Times Square, New York. This LED display with architectural buildings as a carrier is a very unique landscape in New York.
In the future, the oversized LED full-color screen area will present more amazing projects, which is the trend of industry development and the embodiment of social development. However, it should be noted that while pursuing a large area, a full-color screen must consider the product quality of the display screen and the positive energy it brings.
Second, high-definition high-density
High-definition high-density is the development trend of full-color screen display. In order to obtain a better viewing effect, people require the display screen from simple full color to lifelike, to restore the authenticity of the color, but also to achieve a comfortable and clear image display like a TV on a smaller display. Therefore, high-definition displays represented by high-density small-pitch LED displays will be the future development trend.
Unlike ultra-large-area displays, high-definition high-density full-color screens seek better display effects on smaller screens, especially high-density displays such as LED super TVs that want to achieve further expansion in the commercial and high-end civilian fields , Solving technical problems is the key. In the past, indoor screens focused on high-brightness, and high-density display screens were used indoors. Too high a brightness is uncomfortable to the human eye. Under low-brightness conditions, achieving high gray, high brushing and other indicators is a technical problem for high-density screens. Today, high-density screens have become popular products that many companies in the industry are pursuing, but enterprises that really occupy the technical height and the property rights of the whole system integration are rare. In the future, this is also a place that needs to be broken through.
3. Energy saving
Energy saving is the direction for which any industry in China is striving. LED full-color screens involve the use of electricity and operating costs, so energy saving is related to the interests of LED full-color screen operators, but also to the use of national energy. Judging from the current situation, energy-saving display screens will not increase the cost much more than conventional display screens, and they will also save costs during later use, and are highly regarded by the market.
In the future, energy-saving LED full-color screen will be a bargaining chip for enterprises. However, energy saving is a trend, but it cannot be used as a gimmick for enterprise competition, and data on energy saving cannot be arbitrarily marked by enterprises. At present, in order to attract attention, some companies in the market have reported data such as 70% energy saving and 80% energy saving, but the real energy saving effect is difficult to measure. In addition, some people deliberately confuse the concept of energy saving with high brightness, thinking that the energy saving effect of the display screen depends entirely on high brightness, which is also an incorrect concept.
As an energy-saving LED display, it must be a comprehensive result under various indicators. Highlighted LED lights, driver ICs, switching power supplies, product power consumption design, intelligent energy-saving system design and structural energy-saving design are related to energy-saving effects, so energy saving The realization of the goal requires the joint efforts of the entire industry.
Four, intelligent
As with energy saving, intelligence is also a product of the development of LED full-color screens to a certain stage. The intelligentization of the LED full-color screen is reflected in the cooperation between the display screen and intelligent operation, such as the new advertising model that began to emerge at the end of last year and interactive games with pedestrians on the subway advertising screen. Through the intelligent induction of the LED display screen, people participating in the activities only need to gesture with their hands to complete various actions prompted on the screen, including making breakfast, playing games, and so on. This intelligent and interactive form of advertising has been well received by the audience and will appear on more advertising screens in the future.
In addition, the LED full-color screen can also realize the intelligent broadcast control experience mode, especially the LED display and modern electronic equipment such as mobile phones, IPAD, etc. realize remote control on demand, intelligent playback and other functions, which will provide more creative and modern use of the display in the future provide technical support.
Five, thin and light
In order to meet the needs of modern society, LED full-color screens work hard on the internal quality of the product on the one hand, and on the other hand, they also work hard on the external form of product appearance, volume, weight and so on. The thin and light full-color screen is not only conducive to the installation and maintenance of the product, but also reduces the load on the supporting building body, makes it safer, and increases the appearance.
The thinning and thinning of the LED full-color screen has driven the trend of thinning and thinning of related devices and parts and components, such as the thinning and thinning of power supply products and the thinning and thinning of cabinets.
In recent years, there have been many incidents of the collapse and fall of full-color screens across the country, which has aroused people's attention to the safety of full-color screens. In the future, when the thin and light display screen becomes the main form, the weight of the display screen itself will be greatly reduced, and hidden safety risks will also be reduced.
6. Normalization of point-by-point calibration
As the application of LED full-color screens becomes more and more extensive, people's pursuit of screen display is not limited to the effect of initial use, but hopes to maintain a good screen effect after a period of time. In the past few years, the point-by-point correction technology of LED full-color screen is only a high-level new technology, and only large-scale and high-end displays can be used. More importantly, people do not care about the point-by-point correction of the full-color screen, and lack of awareness of use.
With the increasing number of indoor and outdoor LED full-color screen projects, displays of different qualities are beginning to appear in people's vision. In contrast, displays that have not been corrected point by point obviously cannot meet the needs of the owners and the attention of the audience . The point-by-point correction technology continues to mature and the price continues to fall. This beneficial technology makes the LED full-color display more outstanding. In the future, point-by-point correction will become the normal technology for full-color screens.
7. Full-color screen civilianization
In the past, the use occasions of LED display screens were mostly high-end, high-grade places, such as banks, stock exchanges, etc., and mostly single and dual-color display screens. The emergence of full-color screens has broken the use of display screens and quickly expanded the application space to indoors and outdoors. The advancement of technology, the linear decline in prices and the mature level of service have made China's LED full-color screen a leap into the world's largest manufacturing country, triggering the climax of domestic full-color screen use.
Users of LED full-color screens have also gradually turned from civilians to civilians. Small and medium-sized hotels, public supermarkets, and private entertainment venues can all buy and use LED full-color screens. Even the traditional single and dual-color door screens have been gradually replaced by full-color screens, and LED full-color screens have also begun to enter ordinary self-employed households. Perhaps one day in the future, we will see all kinds of business information advertisements broadcast in full color, and these are the markets replaced by the original single and dual color display screens.
Eight, indoor screen outdoor
The development of outdoor advertising has created a broad application space for LED display screens. Traditional advertising media companies have strengthened the layout of outdoor display screens to seize business districts around the world. Even LED display manufacturers have joined the outdoor advertising industry and directly participated in market competition .
The hot market of outdoor LED displays has promoted the development of surface-mounted full-color screens. Due to the complex installation environment and the high technical requirements of outdoor LED display screens, it is necessary not only to cope with various severe climate changes, but also to defend against chemical gases such as automobile exhaust. A few years ago, outdoor LED full-color screens were almost all in-line. This change in trend has benefited from the advancement of outdoor surface mount SMD technology. The outdoor surface-mounted full-color screen has obvious advantages over the in-line display in terms of picture display, beauty, viewing angle, and maintenance, and meets the requirements for outdoor use.
However, there are still technical imperfections in outdoor surface mount displays, especially domestic surface mount devices that need to be further improved. In addition, compared with traditional in-line lamps, the price of surface mount products is obviously higher. In the market where the price is king, the widespread application of surface mount products on outdoor display screens is still a while away.
In the future, outdoor surface-mounted full-color screens will gradually replace in-line products, and truly realize the development trend of indoor outdoor screens. At the same time, outdoor SMD full-color screens are also combined with high-density products. At present, P5 and below high-density outdoor SMD full-color screens have been maturely applied.
9. Integration of decoration, landscape and display
When the buildings in the city are boldly and innovatively using the LED full-color display, how to perfectly integrate the display and the building becomes the customer's request. In many cases, a building itself is a unique design. If you want to install LED display on the periphery or surface of the building, you need to pay attention to the clever design of the screen style. At present, there are many customized LED display screens that are designed according to the requirements of the building, such as bar screens and bead curtain screens, which can effectively display the screen without blocking the building itself, and have beautiful shapes that complement each other. In the future, LED display screens will be combined with modern decoration, landscape, lighting, etc. to form a better creative display of the city.
Ten, screen enterprises concurrently operating lighting
The tenth largest development trend of LED displays in the future is the relationship with lighting. As the LED display screen gradually enters a mature period, the market growth rate is limited, and while the competition is increasing, the prospect of LED lighting is infinitely enlarged, and the vast market capacity has attracted the entry of many capitals and companies from both industries. The trend of display companies investing heavily in lighting while operating displays has become a common phenomenon. So far, the majority of lighting companies in the display industry account for the majority, but the number is basically in stereotypes.
If you want to reap your own market in the lighting market, display companies usually need to face competition from traditional lighting companies, professional lighting companies, etc. At the same time, this is a long-term and huge investment before the lighting market completely erupts. Capital and strength determine the company's reserves. In the future, it will be difficult for small businesses that want to make a fortune in both markets to survive in a small game. As a cross-sector enterprise that simultaneously operates both display and lighting, it needs to cope with the challenges and pressures from the two markets. Proper operation will double profits, and improper operation may contain each other.
In addition to the above ten major development trends, the LED display industry will also appear new highlights and trends, such as more professional users, more mature service teams, and the emergence of various emerging subdivisions. In general, the market for LED full-color screens will develop steadily and gradually mature. So how to control and improve the quality of LED full-color display has become a key factor.
How to control and improve the quality of LED full color display
The display effect of the full-color LED display is directly related to users and audiences. To obtain a perfect user experience, you need to control and improve the quality of the LED display. So, how to control and improve the quality of LED full-color display? What are the important indicators that reflect the quality of LEDs for full-color LED displays?
As the most critical component of a full-color LED display, LED devices have three reasons:
First of all, LED is the most used key device in the full-color screen machine. Thousands to tens of thousands of LEDs will be used per square meter;
Secondly, LED is the main body that determines the performance of the entire screen optical display, which directly affects the audience's evaluation of the display screen;
Thirdly, LED accounts for the largest proportion of the overall display cost, ranging from 30% to 70%. The choice of LED determines the quality of more than 50% of the entire display. If you can't choose a good LED, the other parts of the display can't make up for the quality defects of the display.
The important indicators reflecting the quality of LEDs for full-color LED displays are:
1. Failure rate
Since the full-color display is composed of tens or even hundreds of thousands of groups of red, green, and blue LEDs, the failure of any color LED will affect the overall visual effect of the display. Generally speaking, according to industry experience, the failure rate before the LED display begins to assemble to aging 72 hours before shipment should not be higher than three-ten thousandths (referring to the failure caused by the LED device itself).
2. Antistatic Capability
LEDs are semiconductor devices that are sensitive to static electricity and can easily cause static electricity failure. Therefore, anti-static ability is crucial to the life of the display screen. Generally speaking, LED human body static mode test failure voltage should not be lower than 2000V.
3. Consistency
The full-color display is composed of countless red, green, and blue LEDs. The consistency of the brightness and wavelength of each color LED determines the brightness consistency, white balance consistency, and chromaticity of the entire display consistency. In general, display manufacturers require device suppliers to provide LEDs with a wavelength range of 5 nm and a brightness range of 1: 1.3. These indicators can be achieved by device suppliers through a spectroscopic color separation machine. Voltage consistency is generally not required.
4. Brightness
LED brightness is an important determinant of display brightness. The higher the brightness of the LED, the greater the margin of the current used, which is good for saving power and keeping the LED stable. LEDs have different angle values. When the brightness of the chip is fixed, the smaller the angle, the brighter the LED, but the smaller the viewing angle of the display. Generally, 100-degree LED should be selected to ensure sufficient viewing angle of the display. For displays with different pitches and different viewing distances, a balance should be found in brightness, angle and price.
5. Attenuation characteristics
Red, green, and blue LEDs all have the characteristic of brightness attenuation with the increase of working time. The pros and cons of LED chips, the quality of auxiliary materials and the level of packaging technology determine the attenuation rate of LEDs. Generally speaking, after 1000 hours and 20 mA ambient temperature lighting test, the attenuation of red LED should be less than 10%, and the attenuation of blue and green LED should be less than 15%. The consistency of red, green and blue attenuation is displayed for full color LED The future white balance of the screen has a great influence, which in turn affects the display fidelity of the display.
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