P‐216: Late‐News Poster: UHPD Technology for Enhanced User Experience of Near‐Eye Applications

Abstract

UHPD technology is developed on glass substrate. This technology eliminates screen‐door effect and therefore enhances significantly user experience. A 2228ppi AMOLED panel has been demonstrated. Critical breakthroughs include 11.4um pixel circuitry integrated in LTPS process and 17.27% aperture ratio in each color. With additional MOST display flexibility is increased dramatically.

Recent progress of organic light-emitting diode microdisplays for augmented reality/virtual reality applications

“…By developing the pixel circuits, TFT processes, and driving schemes, they demonstrated both the 3.23-inch, 1,000 ppi, 2,160 × 2,400-resolution, and 90 fps PMOS display panel and the 2.2-inch, 1,000 ppi, 1,080 × 2,400-resolution, and 120 fps NMOS display panel. Cheng et al developed the circuitry for a highresolution AMOLED panel that included a pixel circuit to compensate for the threshold voltage (V TH ) variation and the voltage drop, and a gate driver on an array that generated S and E waveforms [44]. To reduce the screendoor effect, the high-resolution OLED patterning process was also developed, which resulted in a high aperture ratio of 17% with a pixel size of 11.4 μm, as shown in Figure 6(b).…”

“…Copyright 2018, John Wiley and Sons. (b) Aperture ratios of the conventional and developed pixels with regard to the pixel density[44]. Reprinted with permission from ref [44]…”