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Jun 22,2021| LED Knowledge
1. What are the characteristics and identification skills of the full-color LED display?
Full-color LED display is a kind of LED display. Its main features are:
(1) Rich colors: It is composed of three primary colors (red, green, and blue) display unit boards, red, green, and blue each with 256 gray levels constitute 16,777,216 colors, so that the electronic screen can display rich colors, high saturation, and high resolution. Dynamic images with high resolution and high display frequency;
(2) Good effect: using nonlinear correction technology, the image is clearer and the sense of hierarchy is stronger;
(3) Strong reliability: using distributed scanning technology and modular design technology, reliability and stability are higher;
(4) Super detection function: real-time detection of pixel failure in the screen, remote transmission of the working status of the pixel;
(5) The brand-new mask design makes the light emitted by the LED almost achieve zero reflection, ensuring the display effect of the screen;
(6) High flatness: the flatness coefficient of the cabinet is less than 0.5mm, and the power factor is as high as 88% or more;
(7) Input signal diversification: support RF, S-VIDIEO, RGBTV, YUT, YC, COMPOSITION and other stage signals;
(8) High waterproof performance: waterproof rubber ring is used on the back of the module, and high-quality imported glue is used for filling on the front;
(9) Durability: High temperature spraying technology is used to greatly improve the anti-rust function; the light-emitting module is guaranteed for ten years, the mask is not reflective, UV resistant, and does not fade for five years;
2. Material selection of supporting products for full-color LED display
1. LED lights and chips
The LED lamp is not only an LED light-emitting tube, but also a key component of a full-color LED display. Therefore, reliable quality and mature packaged LED products should be used. The selected LED product must have good stability, low dispersion, HBM greater than 4000V, small attenuation, strong voltage resistance, high brightness, wavelength, angle consistency, good light distribution, and resistance to temperature differences, humidity and ultraviolet rays. .
The whole is made of steel plate or aluminum, and the door structure is adopted. Pins are used at the top of the box and guide sleeves at the bottom to ensure precise positioning between the boxes. The overall protection of the cabinet conforms to the IP65 standard, and the structure should fully consider heat dissipation issues.
3. Switching power supply
The full-color LED display is powered by a certified famous brand switching power supply module. All switching power supplies have undergone rigorous testing, screening and aging. Ensure full compliance with international safety and quality certification requirements to meet the requirements of long-term stable and reliable operation of the display. Under rated working conditions. Ensure that the service life is greater than 10 years.
The connector is an important connecting device in the system. High-quality connector products should be used to ensure the thickness of the pure gold plating of the connector and maintain the best electrical connection performance. Ensure the good electrical connection performance of the system under high temperature and high humidity environment, so that the system can run stably and reliably for a long time.
5. Circuit board
The circuit board is made of flame-retardant epoxy board, the design layout is reasonable, and the wiring is standardized to meet the requirements of electromagnetic compatibility and circuit stability. Processing factories should choose products produced by well-known manufacturers.
6. Driver chip IC device
The driving circuit adopts the constant current driving chip of the international famous brand. In a large temperature range, maintaining high-precision constant current output and high reliability can significantly improve the uniformity and reliability of the full-color LED display. The main materials of the display system should pass CE, FCC, UL, CCC, ISO9000 and other certifications. I believe that if we do what we said above, adhere to reliable supporting facilities materials and professional R&D and design technology, we will definitely be able to reduce the failure rate of the display and greatly improve the reliability and stability of the LED display.