Title :
A 2.7 in. 1.3 MPixel driver-integrated poly-Si TFT-LCD for multimedia projectors
Author :
Asada, H. ; Hirata, K. ; Ozawa, K. ; Nakamura, K. ; Tanabe, H. ; Sera, K. ; Hamada, K. ; Mochizuki, K. ; Ohi, S. ; Saitoh, S. ; Okumura, F. ; Kaneko, S.
Author_Institution :
NEC Corp., Kawasaki, Japan
Abstract :
The rapid progress of multimedia demands liquid crystal display (LCD) projectors that can display computer data, such as video-graphic arrays (VGA), super-video-graphic arrays (SVGA), extended-graphic arrays (XGA) and super-extended-graphic arrays (SXGA). One of the major challenges for poly-Si TFT drivers in such multi-scan LCDs is displaying as black in the peripheral region around the picture during a blanking period. Using conventional shift register driver circuits, the scanning speed in the up-and-down no-picture region is too high for pixel TFTs to write signals for black. Although decoder driver circuits for multi-scan operation have been introduced into an HDTV poly-Si TFT-LCD, they require many address signals and logic gates. These increase circuit area and thereby decrease the manufacturing yields. Poly-Si TFT drivers use a combination of bi-directional shift registers and decoder circuits to solve the above problems for a 2.7 in, 1.3 Mpixel TFT LCD light valve.
Keywords :
driver circuits; liquid crystal displays; multimedia systems; optical projectors; silicon; thin film transistors; 1.3 Mpixel; 2.7 in; SVGA; SXGA; Si; VGA; XGA; bi-directional shift registers; computer data; decoder circuits; driver circuits; light valve; multi-scan operation; multimedia projectors; poly-Si TFT-LCD; video-graphic arrays; Blanking; Computer displays; Decoding; Driver circuits; HDTV; Liquid crystal displays; Logic circuits; Logic gates; Shift registers; Thin film transistors;
Conference_Titel :
Solid-State Circuits Conference, 1996. Digest of Technical Papers. 42nd ISSCC., 1996 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3136-2
DOI :
10.1109/ISSCC.1996.488566
