Title :
High definition front projector using poly-Si TFT LCD
Author :
Yoneno, Kunio ; Kamakura, Hiroshi ; Nakamura, Junichi ; Yajima, Akitaka ; Karasawa, Joji ; Nakayama, Tadaaki ; Ogihara, Masanori ; Miyazawa, Yoko ; Banda, Shunji ; Okamoto, Norihisa
Author_Institution :
Seiko Epson Corp., Nagano, Japan
Abstract :
The authors have developed an HD (high-definition) front projector using 1.38-Mpixel poly-Si TFT (thin-film transistor) LCLVs (liquid crystal light valves) that have the smallest size and the highest density of pixel of transmission types. The diagonal size of the projected image can be changed from 40 to 120-in by a zoom lens. The main optical system includes dichroic prisms in the color composition system in order to reduce asymmetric aberrations and a bias technique in which the image is projected above the horizontal level of the projector. As a result, 950 vertical TV line resolution has been achieved by adopting motion adaptive scanning line interpolation for realizing the performance of poly-Si TFT LCLVs, and the image-sticking of the motion picture has been reduced.<>
Keywords :
elemental semiconductors; high definition television; large screen displays; liquid crystal displays; silicon; thin film transistors; 120 inch; 40 inch; LCD; Si; TFT; asymmetric aberrations; bias; color composition; dichroic prisms; high definition front projector; image-sticking; liquid crystal light valves; motion adaptive scanning line interpolation; polysilicon; thin-film transistor; zoom lens; HDTV; Lenses; Light sources; Mirrors; Optical distortion; Optical films; TV; Thickness control; Thin film transistors; Voltage;
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.1991.167455
