48‐2: Invited Paper: Advanced LTPO Technology for CMOS Driving

Abstract

A new advanced low×temperature polysilicon oxide semiconductor (LTPO) technology is proposed to realize CMOS×driven activematrix organic light×emitting diode (AMOLED). The advanced LTPO technology can be used in various applications by entirely CMOS×driven circuit operation, compared to the conventional one. It can reduce power consumption and the number of channels in a driver IC. We should solve technical issues related to metal×oxide thin×film transistors (TFTs), such as depletion×mode operation and relatively low carrier mobility, to realize the advanced LTPO technology. Herein, we investigated the advantages of advanced LTPO technology and the requirements of oxide TFTs for advanced LTPO based on a 10×inch QHD display simulation.

P‐13.1: Analysis of Reduced Power Consumption in Always On Display Mode for OLED Display

“…In addition, there was no obvious flicker for pattern1 and pattern2 when the frequency was reduced to 1Hz and 0.1Hz, which may be related to the LTPO of the experimental screen [4][5]. However, the risk of flicker may increase at 0.1Hz since flicker degree of different images is strongly correlated with refresh rate.…”

P‐27: Multi‐Frequency Driving for Low Power Consumption by New Scan Circuit

“…However, the high resolution and fast frame rate would induce the higher power consumption, which restrict the usage time of battery of mobile device [2]. In order to reduce the consumption, at present, an effective way is adjusting the frame rate of screen dynamically, including new low temperature polycrystalline oxide (LTPO) pixel circuit [3][4][5][6][7][8], novel gate of array (GOA) circuit [9][10][11], integrated circuit (IC) assistance [12,13].…”

85‐2: 2117PPI VR LCD with ultra‐high aperture opening ratio

“…At present, the preferred solution for glass-based ultra-high PPI is liquid crystal display (LCD) technology, because the LCD display has only one switch TFT in the pixel area, which is benefit to achieving high PPI [3][4][5]. However, VR is a near-eye display with high demand for backlight and transmittance, while LCD display requires two polarizer layers with low transmittance, the pixel design of backplane with high opening ratio is therefore a big challenge.…”