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With the maturity of the LCD flat-panel display industry, the vital backlight is also advancing with the times, moving towards the development of energy saving, environmental protection, safety, low power consumption, high brightness (HDR), thinning and miniaturization... However, the research and application of Mini LED can just meet the needs of 3C-type consumer electronics, military industry, medical care, large-scale advertising media and outdoor displays... etc., and the needs of medium and high-end markets. LED is gradually replacing it.
In the process of researching Mini LED, it was discovered that Mini LED has started a quiet revolution under Apple’s strength. The consumer electronics and display industries, after successively investing in the research and development of Mini LED in the top international brands, have begun to launch. Mini LED related products seize market opportunities.
The research of this paper is divided into two parts. The first is Lighttools optical simulation, the establishment of Mini LED module model, and the use of 3D drawing software Solidworks is used to modify the shape of the optical encapsulant. The function of boundary surfaceis used to create the surface and change the top surface of Mini LED. A convex curved surface achieves the effect of an optical lens.
Through the simulation results of Lighttools, adjust the curvature of the Mini LED's curved surface and correct the illuminance value between the Mini LED borders. So that the graininess and checkerboard appearance in the screen are diminished, and the optimal uniformity is 80%.
The second part: LED specifications and lens curved surfaces set according to the simulation results are made into Mini LED light panels through domestic professional LED manufacturers and factory-scale small-batch production. The actual installation is used on a 65-inch display, which can be simulated to the factory feasibility assessment of large-scale and mass production. Using professional optical measuring instruments simultaneously, SR-3A performs all optical characteristic measurements to confirm whether the finished product meets the requirements of the market. The 65-inch Mini LED TFT-LCD has been measured. The 81-point brightness uniformity of the module reaches 93.91%, the center brightness: 778.5Nits. The 25-point brightness uniformity of the LCD module reaches 94.87%, the center brightness: 777.12Nits. The 9-point brightness uniformity of the LCD module reaches 93.97%, Center brightness: 778Nits, which meets the market specifications of 75% Min specification of brightness uniformity and 620Nits of center brightness.
A Mini LED display that can be mass-produced is simulated and actually developed through Lighttools. The space thickness is set to 5mm, which is already thinner than most TVs on the market. The development trend of TVs is thinner, and the space thickness of LEDs may be reduced in the future. The shrinking space will make it easier to see the distinct phenomenon of the LEDs on the screen. It is more difficult to design a uniform LED primary optical lens. I hope that further research can complete the LED primary optical lens design of a thinner TV. In line with the future market demand for products, it is also expected that in the future Mini LED application development. It can effectively shorten the initial development investment and save the manpower, material resources and financial losses consumed in the initial development.
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