On April 30th, LED backlighting is currently the most beautiful large-size panel backlight application technology. Taiwan Institute of Industrial Technology recently published a wide color gamut LED backlight technology, innovative use of violet LED to stimulate RGB three-color phosphor, expand the color gamut of the panel, can easily exceed 90% of the color rendering ability, accurately display the rich color of the image, let the TV and The display reproduces the real-world "excellent" visual effect, providing panel manufacturers with more competitive LED innovation application technology, and attacking the LED LCD TV market!
According to the Institute of Electro-optics of the Industrial Technology Research Institute, since the LEDs began to be used in large-size panel backlights such as LCD TVs and monitors in 2009, the demand for LED TV backlights has grown considerably. This year, global LED LCD TVs are expected to reach 32 million units. The purple LED backlight module developed by ITRI has high color uniformity. It only needs a set of light sources and can be mass-produced with a simple drive circuit. It not only provides a new solution for the backlight module technology in Taiwan LED industry , but also The LED industry, which is deeply troubled by patents, finds its own patented technology, which helps to enhance the international competitiveness of Taiwan's LED industry and expand its future development.
ITRI ​​uses violet LED (400nm) to excite RGB three-color phosphors, and with the narrow-bandwidth green phosphor developed by ITRI, the red light bandwidth is sufficient, the color gamut is wider, and the color saturation can exceed 90. The % NTSC color gamut, which displays images of people closer to real colors, such as a slightly reddish facial effect, is therefore more suitable for medical and industrial display requirements with high color quality requirements. In addition, the violet LED developed by ITRI has no problem in color distribution, color stability and color uniformity, and the product yield is doubled compared with the prior art. Due to the good luminous efficiency, the number of LEDs used in the display can be reduced, and the production cost is greatly reduced.
LEDs are widely used in backlights because of their power saving, energy saving and long life. However, the current LED backlight module uses a blue LED plus a green phosphor and a red phosphor. After the blue LED is involved in the light mixing, the yellow circle and the blue halo phenomenon occur due to the difference in the position of the light emitted from the phosphor, and the angle color difference occurs. Can reach 80% NTSC level, therefore, all major manufacturers around the world are committed to improving the color gamut range of liquid crystal displays, and strive to make images closer to real colors.
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