P‐24: Integrated Gate Driver for 2700‐ppi 8K 120Hz Displays using a‐IGZO TFTs

Abstract

We propose a high-speed, fine-pitch gate driver using a-IGZO TFTs. The gate driver has a pitch of 18.6μm supporting the pixel density up to 2700 pixel-per-inch (ppi) when applied to two sides of the display. Moreover, the gate driver works within a very short stage period of 1μs, which corresponds to a refresh rate of 120Hz at 8K resolution. This study enables gate driver integration for high ppi a-IGZO displays, which can be used for mobile and AR/VR applications.

39‐3: Distinguished Student Paper: In‐Pixel Temperature Sensor for High‐Luminance Active‐Matrix Micro‐LED Display using LTPO TFTs

“…In order to demonstrate the ability of integrating the sensor into active matrix backplane, we finally designed a 64 x 64 active matrix LTPO temperature sensor with integrated gate driver. Detail of the integrated gate driver is explained in [14][15]. Each pixel uses 3 TFTs and with a pixel pitch of 300µm.…”

9‐3: BLA LTPS TFTs based μ‐LED Display with Integrated Digital Driving

“…The third stage uses CLK 3 as driving and CLK1 as reset, and so on. Advantage of using 4-phase clocks instead of 2-phase is that all TFTs in the gate driver are working as switches and no ratioed structure like inverter is applied [2][3][4][5]. As the BLA LTPS TFTs usually have steep threshold swing in transfer characteristics, the conventional ratioed inverter always suffers from poor noise margin.…”

Gate driver with low‐temperature polycrystalline silicon and oxide thin‐film‐transistor circuits for low power consumption and narrow bezel AMOLED displays

“…1 Depending on rapid development of display, such as ultra-high definition (UHD) display, integrated GOA requires high performances of not only fast operating speed but also high reliability and low power consumption. 2,3 Several gate drivers composed of a-Si thin-film transistors (TFTs) were reported. 3,4 However, a-Si TFTs exhibit low mobility compared to poly-Si and oxide TFTs, so that a-Si TFTs are not applicable for high performance display.…”

“…In AMOLED display, integrated gate driver on array (GOA) has attracted much attention to reduce the cost of external driver IC and to make compact display 1 . Depending on rapid development of display, such as ultra‐high definition (UHD) display, integrated GOA requires high performances of not only fast operating speed but also high reliability and low power consumption 2,3 . Several gate drivers composed of a‐Si thin‐film transistors (TFTs) were reported 3,4 .…”