We have developed a 17.3-inch 8K wide color gamut in-plane switching LCD (IPS-LCD) with a polarized laser backlight. By applying a zero–zero-birefringence polymer, the polarized laser backlight emits polarized light with 88% polarization. We adapted the double light guide plate laser backlight to achieve uniform luminance. The developed IPS-LCD achieves a wide color gamut with high efficiency. The speckle problem was solved by applying an AC voltage to the laser diodes. In addition, the double light guide plates effectively suppress the speckle as the light is uniformly mixed in the light guide plate.
A BT.2020 wide color gamut is obtained using a laser backlight liquid crystal display (LCD). A conventional side-edge laser backlight requires a wide bezel area to achieve uniform brightness. We developed stacked double light guide plates, with each plate comprising light-mixing and light-emitting areas. The light-mixing area of each plate overlaps the light-emitting area of another light guide plate, thereby reducing the bezel width from 150 to 15 mm for a 17-inch LCD.
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