A memory-in-pixel reflective-type LCD using newly designed system and pixel structure

作者：Tamaki Masaya^*; Fukunaga Yoko; Mitsui Masashi; Maeda Kazuyuki; Kabe Masaaki; Teranishi Yasuyuki; Nakanishi Takayuki; Omori Hideyuki; Hayashi Shuji; Takasaki Naoyuki; Goto Fumitaka; Harada Tsutomu

来源：Journal of the Society for Information Display, 2014, 22(5): 251-259.

DOI：10.1002/jsid.245

• color reflective LCD
• low power consumption

A 7.03-in. extended graphics array reflective LCD prototype has been developed by using memory-in-pixel (MIP) technologies with a newly designed system and pixel structure. The MIP system comprising a MIP backplane and a display driver has been optimized to reduce power consumption. The MIP backplane has specific circuits that allow accessing row drivers randomly, and the display driver manages which row should be accessed. Thus, the system is capable of showing a mixture of still and moving images, resulting in low power consumption. A dithering block embedded in the display driver enables to select an appropriate dithering algorithm according to the types of images and the position on the screen. In addition, the novel pixel structure, "three divided patterns", has been designed to improve image quality and to provide visibility in dark environments. The latter is based on a novel approach; interpixel area is used for an aperture to transmit light from the backlight, and the fringe field from adjacent pixel electrodes is used to control LC directions. The feature of the pixel structure is also effective for obtaining equivalent gamma between reflective and transmissive images.

• 出版日期2014-5