Development of a low voltage source driver for large TFT-LCD system for computer applications

Author

Okada, Hisao ; Ogawa, Yoshinori ; Fukuoka, Hirofumi ; Kanatani, Yoshiharu ; Sano, Yoshiki ; Itoh, Yoshiroh ; Hijikagawa, M.

Author_Institution

Sharp Corp., Osaka, Japan

fYear

1991

fDate

15-17 Oct. 1991

Firstpage

111

Lastpage

114

Abstract

A 3-b digital source driver driven by a single +5-V power source has been developed for large TFT-LCD (thin-film transistor liquid-crystal display) panels already under mass production. The maximum sampling speed of this driver is up to 20 MHz, more than three times as fast as the traditional analog sampling driver. The new driver´s LSI chip is a square about 30 mm/sup 2/, smaller than half the square made under the hybrid process. A new technology was developed to drive this driver, i.e., alternating the grey level voltage and also alternating the Vcom inversely with the polarity. With this new driver and its driving mechanism, a 10.4-in CA (computer application) TFT-LCD system has been mass-produced that can generate 512 colors simultaneously for every panel pixel.<>

Keywords

digital integrated circuits; driver circuits; large scale integration; liquid crystal displays; thin film transistors; 10.4 inch; 20 MHz; 5 V; LSI chip; TFT-LCD; computer application; computer applications; digital source driver; grey level voltage; liquid crystal display; low voltage source driver; sampling speed; thin-film transistor liquid-crystal display; Computer applications; Decoding; Large scale integration; Logic; Low voltage; Manufacturing processes; Sampling methods; Signal sampling; Switching circuits; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Display Research Conference, 1991., Conference Record of the 1991 International

Conference_Location

San Diego, CA, USA

Print_ISBN

0-7803-0213-3

Type

conf

DOI

10.1109/DISPL.1991.167445

Filename

167445