Junichiro Sakata

15.2: Development of Driver-Integrated Panel Using Amorphous In-Ga-Zn-Oxide TFT

We designed, prototyped, and evaluated LCD integrated with a gate driver and a source driver using amorphous In-Ga-Zn-Oxide TFTs having bottom-gate bottom-contact structure, thereby obtaining TFTs with superior characteristics. Then, we prototyped the worlds first 4-inch QVGA LCD and integrated the gate driver and source driver on the display panel.

21.3: 4.0 In. QVGA AMOLED Display Using In‐Ga‐Zn‐Oxide TFTs with a Novel Passivation Layer

We have developed a 4.0 inch QVGA AMOLED display using amorphous In-Ga-Zn-Oxide TFTs, focusing on a passivation layer. Threshold voltage of the TFTs can be controlled to have “normally off” characteristics by using SiOx with a low hydrogen content. Besides, small subthreshold swing and high saturation mobility are obtained.

P-185: Low-Drive-Voltage OLEDs with a Buffer Layer Having Molybdenum Oxide

In this paper, we introduce a useful composite layer, comprising hole-transporting materials with molybdenum oxide. By using the composite as a buffer layer on an anode, an OLED with low drive voltage can be obtained, and pixel defect formation can be effectively suppressed.

43.4: Low Power LC Display Using In-Ga-Zn-Oxide TFTs Based on Variable Frame Frequency

By using an oxide semiconductor, we successfully prototyped a 3.4-inch QHD LCD panel including data and scan drivers; their power consumption is reduced by variable frame frequency (from 1/60 fps to 120 fps) depending on images. Low frame frequency in displaying still images on a PC monitor can reduce eyestrain.

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

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.

7.3: Development of 3.4in. QHD LCD Having BluePhase LC and OxideSemiconductor TFTs

We fabricated a liquid crystal panel by combining a blue phase material having short response time with an TFT formed using an oxide semiconductor having high mobility and stable normallyoff characteristics. It was very effective to use a highdefinition InGaZnOxide TFT substrate that we had developed.