P1.5 P1.8 P2.5 Outdoor led display
An outdoor high resolution LED display is a type of LED display that has a small pixel pitch, which means the distance between two adjacent pixels is very short. This allows for a high resolution and clear image quality even at close viewing distances. Outdoor high resolution LED displays are suitable for various applications, such as advertising, digital signage, sports, entertainment, and events.
LED screens have developed rapidly in recent years, especially for outdoor applications. The most common type of outdoor LED display is the LED inline light, which has a large pixel pitch of 4 mm, 5 mm or more. This means the distance between two adjacent pixels is very long, which affects the image quality when viewed from a close distance.
However, outdoor LED displays are not only used for huge billboards in shopping malls and on highways, but also for various other purposes, such as advertising, digital signage, sports, entertainment, and events. As a result, people are increasingly expecting to see a high-definition viewing effect from outdoor LED screens. This has led to the trend of reducing the pixel pitch of outdoor LED displays.
Therefore, LED technology and manufacturing techniques have improved to meet the demand for high-resolution outdoor LED displays. The pixel pitch of outdoor LED screens has gradually decreased from P10 to P3, P2.5, and even P1.8 and P1.5. This means the distance between two adjacent pixels is very short, which allows for a clear image quality even at close viewing distances. For example, an outdoor P1.8 LED display uses SMD LED technology, which protects the LEDs from water, dust, and UV rays, and enhances the brightness and color uniformity of the display.
In the progress of technology and people’s continuous pursuit of display effect, such as outdoor advertising and other applications of outdoor LED display put forward higher requirements, not only high brightness, but also withstand the sun and rain, in order to achieve a wider perspective, more vivid colors and clearer details of the display. The birth of outdoor small–pitch, is to meet these needs of the people. With the packaging device is getting smaller and smaller, outdoor display began to small–pitch direction, the original is the use of inline package form, and then with the maturity of the technology, the table sticker began to be used in outdoor. Table stickers began to 5050 package, followed by the gradual emergence of 3535 package, and now the rise of the 2828 package. Packaging devices all the way to miniaturization, coupled with weathering performance has been an essential breakthrough, the table sticker display began to move from indoor to outdoor, which is the prototype of outdoor small-pitch development.
Fine-pitch LED display indoors has been widely used while outdoor Small–pitch displays have just started to develop, from the technology is not yet an essential breakthrough. rome is not built in a day, the development of outdoor small–pitch also needs a long time, after a lot of experimentation and verification.
 Advantages
 Outdoor small pitch LED display screen picture is clearer, better color reproduction, customer creativity show better, more and more by the media company and outdoor advertising owners love. It is not only an advertising medium, but also an intelligent interactive terminal, which draws the distance between the display and the viewer, so that the display is no longer high above, no longer let people can only “watch from afar and can not be close to play“, “grounded“ dissemination of information, eliminating the “rejection“ of the LED display. LED display “refuses people outside“ the sense of strangeness.
The pro–people display, not only strengthen the media dissemination effect, but also established the link between outdoor advertising and cell phones, such as through the QR code, micro letter, interactive and other ways of application of new technologies can enhance the influence of outdoor media, interactivity and media value.
Difficulties
 Indoor small pitch display has been developed very mature, it replaces the projection, DLP, LCD such as splicing large screen wall, in the industry to occupy part of the market. But the complex outdoor environment, for the development of small–pitch is a strict challenge. To do a good job of outdoor small–pitch LED display, you need to choose the surface–mounted LED devices, but the surface–mounted LED display brightness is low, and waterproof, moisture–proof, UV–resistant functional indicators do not meet the requirements of the harsh outdoor environment.
 Outdoor small pitch is now very hot, but in fact it still has a lot of problems, a lot of things are immature, but also need to go through a lot of experiments to test its decay time and aging and so on. Moreover, the chip of the outdoor display can not be made too small, if the chip is too small, it is not conducive to attenuation resistance. Especially for outdoor advertising display, a day will be used for about 15 hours, so there are many aspects to consider.
 In addition to technical issues, the price of the product is also one aspect, for outdoor advertising operators, outdoor small pitch LED display is much more expensive compared to the conventional outdoor LED display.
 Waterproof, heat dissipation and other performance is outdoor small pitch need to break through the technical field. The use of outdoor small–pitch display environment determines its waterproof, heat dissipation performance to be more reliable to ensure the long–term operation of outdoor LED media life requirements, and can not rely on the steel structure of the waterproof and heat dissipation design.
 In addition, for outdoor operators, in the pursuit of small pitch LED display, but also fully consider the operation of the screen later. The smaller the dot pitch of the display, the higher the resolution, and the higher the resolution, the higher the clarity of the screen, but for the outdoor screen without the need to use small pitch display to achieve the best display effect, if you follow the trend of the pursuit of small pitch, the use of the lamp beads per unit area will increase exponentially, and therefore the large screen power consumption will be increased significantly, resulting in serious operational pressure.
the summary
Outdoor posting just emerged, many companies encountered a lot of difficulties, but learn from the mistakes, there is a need to improve the problem, it is not a step forward, after a long time of experimentation, and now outdoor posting has gradually matured. By the same token, the development of outdoor small-pitch display is not overnight, it also needs to slowly mature step by step, more difficult than the development of indoor small-pitch, because the outdoor protection performance requirements are higher.
 From the perspective of future development, small pitch as a technology or a product development in outdoor applications have a lot of space. Even if there are still many technical bottlenecks, but it is undeniable that small pitch is an inevitable trend in the form of the industry. With the improvement of SMD process, the weather resistance of outdoor display has been greatly improved, and now the application of P4 products on the market is relatively successful.
