When it comes to large LED screens, the first impression should be a large character

When it comes to large LED screens, your first impression should be big characters. Yes, large LED screens are divided into two types: indoor and outdoor, as well as single-color and full-color. Outdoor LED large screens can be installed on columns or walls, and are generally mainly for advertising business. The indoor LED display screen can be used as a background screen for stage rental. It can be installed in the conference room or hung on the front desk of the company to display the company's promotional information. The gymnasium also has hundreds of square meters. Because the LED screen is modular and structured, it can be expanded wirelessly horizontally and vertically, so it can theoretically be infinitely large. LED large-screen display is another huge market for ultra-high brightness LED applications, including: single-color, two-color and full-color displays of graphics, text, and numbers. Traditional large-screen active displays generally use incandescent lamps, optical fibers, cathode ray tubes, etc.; passive displays generally use the method of flopping. A performance comparison of several displays is listed. LED displays have always been limited by the performance and color of the LED itself. Today, ultra-high-brightness AlGaInP, TS-AlGaAs, and InGaN LEDs can provide bright red, yellow, green, and blue colors, which can fully meet the requirements for full-color large-screen display. The large led screen can be assembled into various structures according to the pixel size. The diameter of small pixels is generally less than 5mm. Each pixel of single-color display uses a T-1 (3/4) LED light, and each pixel of two-color display is two-color T-1(3/4) LED light, full color display requires 3 T-1 red, green, blue lights, or a multi-chip T-1(3/4) LED light as a pixel . Large pixels are formed by combining many T-1 (3/4) red, green, and blue LED lights. Using InGaN (480nm) blue, InGaN (515nm) green and ALGaAS (637nm) red LED lights as the three primary colors of LED display, can provide realistic full-color performance, and has a large color range including: blue-green, green-red, etc. , which is basically consistent with the TV color range stipulated by the International Television System Committee (NTSC). In the future, the development direction of large LED screens will be small spacing and large size. Due to the price drop, there will be more and more application occasions. .