Digital driver for 2-inch LTPS AM-OLED displays

Abstract:

For LTPS AM-OLED displays, the spatial variation in the electrical characteristics of polysilicon TFTs will cause non-uniform pixel brightness and poor grayscale accuracy. The technological solution for this problem will open up the larger size application of LTPS AM-OLED displays. In this paper, a digital driver employing a FPGA device is designed to serve 2-inch color LTPS AM-OLED displays with 128× (160×3) resolution. A digital method of simultaneous address-display (SAD) and the digital visual interface (DVI) are introduced in the driving scheme. 100% display per, ratio can be obtained. Moving image with 16 grayscales is realized and has good image uniformity. This work is supported by the National ’863’ High Technology Research and Development Program of China. (2004AA303570)