Title :
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
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;
Conference_Titel :
Display Research Conference, 1991., Conference Record of the 1991 International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-0213-3
DOI :
10.1109/DISPL.1991.167445
