42‐4: A Novel De‐Mux and 120Hz Driving Technology for High Resolution OLED Displays

Abstract

We propose a novel in-panel, TFT based de-multiplex circuit for reducing column driver outputs. Each column driver output produces a command voltage for two neighboring column lines that are time multiplexed. De-multiplexing is done on the array glass using TFT transistors. This approach supports higherfrequency refresh rates for high-resolution mobile OLED displays while minimizing display driver costs.

Reliability improvement of IGZO‐TFT in hybrid process with LTPS

“…1 On the other hand, there is also a tendency to require high refresh rate driving (generally up to 120 Hz). 2 For this reason, pixel circuits using p-type low temperature poly-silicon (p-LTPS) are the mainstream for OLED pixel circuit because of their high mobility. However, using only p-LTPS pixel circuit, it is difficult to realize low refresh rate driving due to high off leakage current of p-LTPS.…”

“…To reduce power consumption, one of the approach is adapting pixel circuit for low refresh rate driving 1 . On the other hand, there is also a tendency to require high refresh rate driving (generally up to 120 Hz) 2 . For this reason, pixel circuits using p‐type low temperature poly‐silicon (p‐LTPS) are the mainstream for OLED pixel circuit because of their high mobility.…”

High refresh rate and low power consumption AMOLED panel using top‐gate n‐oxide and p‐LTPS TFTs

“…To reduce power consumption, one of the approach is adapting pixel circuit for low refresh rate driving 1 . On the other hand, there is also a tendency to require high refresh rate driving (generally up to 120 Hz) 2 . For this reason, pixel circuits using p‐type low‐temperature polycrystalline silicon (p‐LTPS) are the mainstream for OLED pixel circuit because of their high mobility.…”

7‐1: Distinguished Paper: Reliability Improvement of IGZO‐TFT in Hybrid Process with LTPS

“…Due to the limited amount of battery, it is important to reduce power consumption of the display. To reduce power consumption, one of the approaches is adapting pixel circuit for low refresh rate driving [1]. One the other hand, there is also a tendency to require high refresh rate driving (generally up to 120 Hz) [2].…”