Independent research and development of amorphous silicon HD/FHD display chip

The mobile phone screen market in China has grown rapidly in recent years, with a compound annual growth rate of 13.7%. Among all screen types, TFT-LCD mobile phone screens of small and medium size are most favored by the market, accounting for 59% of the market. The huge market prospects encourage companies to continuously develop new technologies. Not long ago, at the Dongguan Songshan Lake IC innovation summit forum, Han Xu, marketing director of Shenzhen Yunyinggu Technology Co., Ltd., released a high resolution liquid crystal display IC with its own proprietary technology.

According to Han Xu, this IC allows amorphous silicon technology to achieve HD and FHD display levels. Currently, HD (1280×720) products using this technology have been initially applied to 4.3 inch and 4.5 inch mobile phone screens, and the resolution can be Reach 342ppi. It is expected that the resolution of FHD (1920×1080) will reach 441ppi next year. In addition to achieving high resolution, this IC also enables the LCD display to have low power consumption, low cost, and a significant increase in yield. He hopes that through the industrialization of the technology, the competitiveness of the domestic LCD screen industry will be realized.

Unlike other display manufacturers who use LTPS or OXide technology to achieve HD and FHD, Yunyinggu uses color dispersion techniques and algorithms to make people feel high-resolution visually. For its technical principle, Han Xu said, "We use a multi-base color compensation algorithm to convert the original color intensity of the three primary colors of red, green, and blue into the color intensity based on the arrangement pattern of the color dispersion matrix on the driver chip. In order to achieve high-definition image quality."

Because the sensitivity of the human eye to brightness exceeds the sensitivity to color, Yunying Valley’s developed IC retains more brightness information through algorithms, removes redundant color information, and uses the WVGA process to achieve HD/FHD display effects. Increase the white sub-pixel and greatly increase the brightness, thereby reducing power consumption, making the picture quality more delicate, more vivid and more vivid.

Han Xu said that Yunying Valley's technology can be applied to LED/OLED displays, camera front-ends, projectors, and other products in addition to its application to liquid crystal displays. The yield rate has been greatly improved, which has led to a significant cost reduction and industrialization is just around the corner.