04
2023
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04
Ingenuity and quality--just to make a good outdoor SMD screen
Nowadays, LED display is a very common display product in our life, from the stage display in high-end places, to the text scrolling screen on the roadside stalls, or from the large outdoor advertising screen to the small display terminal of conference video , Unknowingly, LED displays have deeply penetrated into every aspect of our lives.
Outdoor LED display has a history of more than 20 years. In the past 20 years, the improvement of display technology performance has mainly followed two routes: one is to increase the color information of the display; this process is a gradual transition from a single-color screen to a three-color full-color display, which took about 15 years. .
The second is: production technology based on increasing pixel density; the introduction of the digital image market increasingly requires screens with higher pixels for outdoor display terminals; it is only in the past three years that high-density outdoor surface-mounted (SMD) screens can be manufactured. matter. At present, the SMD LED P6 screen commonly used in the market is 27,700 dots/㎡, and it is not easy to achieve good applications in all aspects. Outdoor screens with a density of more than 100,000/㎡ have not been seen in the market so far.
On the other hand, the indoor SMD LED small-pitch display has broken through one million pixels per square meter; the application has covered the indoor and professional display markets, and is gradually penetrating into the civilian market. The 2 billion-level display screen companies promoted last year all rely on indoor small-pitch high-definition screens to grow their performance.
Both outdoor and indoor are SMD LED displays, why is there such a big difference in pixel density between the two?
The reason is that there is an essential difference between the two application environments: the indoor screen environment is constant temperature, constant humidity, and no wind; the brightness is only a few hundred cd per square; Under the premise, it is necessary to face harsh environments such as wind resistance, rain resistance, high temperature resistance, salt corrosion resistance, acid dust fog, and ultraviolet resistance. Outdoor SMD LED high-definition screens require RGB lights to be smaller and smaller, and the protection measures and technologies of the lights are getting stronger and stronger. ;
The result is: large-area (hundreds of square meters) high-precision electronic screen products have to face the harsh outdoor all-weather environment, which is a challenge and a leap for those who have become accustomed to indoor application thinking of electronic products.
The status quo is: now the outdoor LED display basically still uses the production process and design of the direct insertion lamp (DIP) large components, monochromatic screen plastic shell + iron box body more than 20 years ago, facing the smaller and more refined SMD There is no revolutionary technical improvement for LED mount parts. Based on such a production technology background, the current outdoor SMD LED screens have low density, dead lights and large light decay (difficult to deal with heat dissipation). The number of dead lights and failure rates after a basic one-year cycle will be difficult for users to accept, and even scrapped .
So far, outdoor SMD LED small-pitch high-definition screens generally have low brightness, poor contrast, many dead lights, and large light decay in the screens produced by the existing conventional plastic shell + iron box process; each square is greater than or equal to 62,500 pixels (P4) , Brightness greater than or equal to 7000cd screen has not been seen, currently only our first-generation aluminum screen can achieve this brightness, density, and contrast, brightness, dead light rate and other performances are the existing global plastic shell + iron box process incomparable.
Outdoor small spacing will reopen the outdoor and semi-outdoor digital signage market that LCD splicing screens have failed to effectively launch, and will create an emerging market of nearly 20 billion yuan in the domestic outdoor/semi-outdoor small advertising screen market. It can be seen how attractive the outdoor small-pitch LED display market is!
In order to improve the flatness of the screen and reduce the impact of outdoor environmental factors on the product, the outdoor standard die-casting aluminum-magnesium cabinet is slowly being used by companies that value quality. In order to ensure the playback effect of the screen screen and the stability and safety of the product , the use of die-casting aluminum-magnesium cabinets is the future development trend and direction.
In the current big data Internet era, the outdoor market is also ushering in new changes. In the future, with the advancement of small-pitch outdoor LED display products, the development prospects are fantastic.
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