We prototyped a 6.0-in. color sequential XGA LCD using an oxide semiconductor. A color sequential LCD has lower power consumption than a color filter LCD because light use efficiency is better. We utilize the low I off of the oxide semiconductor and make frame rate lower, which leads to the lower power consumption of drivers. The color sequential LCD can have a monochrome electronic paper function with a white backlight on.
We fabricated a 1.50‐inch, 3207‐ppi OLED display with drivers capable of 32‐division driving, which is achieved by monolithically stacking OSFETs over SiFETs. Taking advantages of minute OSFETs with a high withstand voltage, Si‐OS connection regions were provided in subpixels to connect Si drivers and OS pixel arrays at given positions.
A prototype of an 8.34 inch, 1058 ppi 8K4K display is fabricated. This display shall use top-gate self-aligned-type crystalline oxide semiconductor field-effect transistors as the backplane, and will be the smallest 8K display in the world.
By using oxide semiconductors, we succeeded in prototyping a 3.4-inch QHD LCD panel whose aperture ratio is high and pixels do not include a storage capacitor. The aperture ratio is increased from 40 % to 59%, resulting in reduction of power consumption in a backlight unit.
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