P‐143: Possibility of Reflective LC Display Using Oxide Semiconductor TFTs as Electronic Paper Display

Abstract

We successfully prototyped a 3.4-inch QHD PDLCD panel integrally including data and scan drivers of oxide semiconductor TFTs and capable of displaying still images at 0.2 fps, which can be adopted to electronic paper displays. This panel can display both still images and moving images and reduce power consumption.

67.3: New Driving Method for Reducing Eye Strain Technology (REST) in Displaying Still Image Using CAAC IGZO LC Display

“…We reported a driving method for reducing the power consumption of drivers by utilizing the off-state leakage current of an IGZO transistor, which is much lower than that of a Si transistor, so that the interval between data rewrite operations is 5 seconds or longer while still images are displayed [6][7][8].…”

“…Research on IGZO was started by Kimizuka et al in the mid-1980's [1][2][3][4][5]. We have reported LCDs and tandem OLED displays using IGZO transistors [6][7][8][9][10][11][12][13]. Since an IGZO transistor has much higher mobility than amorphous silicon (a-Si) transistor and has normally-off characteristics, drivers can be easily fabricated on glass.…”

“…As applications unique to IGZO with this feature, we reported a method for reducing power consumption by extending an interval between data rewrite operations in displaying still images [6][7][8]. To achieve this driving method, the properties of liquid crystal are important.…”

Fabrication of 8K4K organic EL panel using high-mobility IGZO material

“…In addition, CAAC‐IGZO and nc‐IGZO are suitable for mass production because they can be manufactured over a glass substrate at relatively low temperatures and show a stable crystal size that remains unchanged by heat treatment. To develop IGZO‐based electronic devices, we have fabricated channel‐etched field‐effect transistors (CE FETs) with high performance characteristics and high reliability by reducing the amount of defect levels in the gap in an OS‐FET through the use of a CAAC‐IGZO active layer as described above …”

28.2: Driving Method of FFS‐Mode OS‐LCD for Reducing Eye Strain

“…Attempts at such low-frequency driving, that is, idling stop (IDS) driving, employing an OS were previously reported [9][10][11][12][13][14][15][16]. This is eye-friendly REST driving, which can reduce flickers.…”