(io) Patent No.: US 7,009,592 B2 (45) Date of Patent: Mar. 7,2006
(54) METHOD FOR DRIVING TRANSFLECTIVE LIQUID CRYSTAL DISPLAY
(75) Inventors: Yuh-Ren Shen, Tainan (TW);
Ching-Yih Chen, Miaoli (TW)
(73) Assignee: Industrial Technology Research Institute, Hsinchu (TW)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 393 days.
(21) Appl. No.: 10/643,186
(22) Filed: Aug. 18, 2003
(65) Prior Publication Data
US 2004/0201560 Al Oct. 14, 2004
(30) Foreign Application Priority Data
Apr. 9, 2003 (TW) 92108095 A
(51) Int. CI.
G09G 3/36 (2006.01)
(52) U.S. CI 345/87; 345/204; 349/114
(58) Field of Classification Search 345/87,
345/204; 349/114 See application file for complete search history.
A method for driving a transflective LCD. In the present invention, the transflective LCD has a plurality of pixels arranged in a matrix, and each pixel includes a reflective cell and a transmission cell. The reflective cell and transmission cells are driven by different transistors. In the method of the present invention, all the first switching devices are turned on and the first driving voltages are then applied to the reflective cells in turn. After that, all the second switching devices are turned on and the second driving voltages are then applied to the transmission cells in turn. The first driving voltages are applied to the reflective cells in turn and the second driving voltages are applied to the transmission cells in turn in one frame period.
10 Claims, 16 Drawing Sheets