(12) Patent Application Publication (10) Pub. No.: US 2006/ A1

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1 (19) United States US A1 (12) Patent Application Publication (10) Pub. No.: US 2006/ A1 Kimura (43) Pub. Date: Nov.30, 2006 (54) ACTIVE MATRIX DISPLAY DEVICE, METHOD FOR DRIVING THE SAME, AND ELECTRONIC DEVICE (75) Inventor: Hajime Kimura, Atsugi (JP) Correspondence Address: COOK, ALEX, McFARRON, MANZO, CUMMINGS & MEHLER, LTD. SUTE 28SO 2OO WEST ADAMS STREET CHICAGO, IL (US) (73) Assignee: Semiconductor Energy Laboratory Co., Ltd. (21) Appl. No.: 11/430,129 (22) Filed: May 8, 2006 (30) Foreign Application Priority Data May 20, 2005 (JP) O1 S CLK, S CLKB S SP Video Data GENABLE G CLK, G CLKB Publication Classification (51) Int. Cl. G09G 3/34 ( ) (52) U.S. Cl /84 (57) ABSTRACT An object of the invention is to provide a display device which can reduce the number of times signal writing to a pixel is carried out and power consumption. A display device which can reduce the number of times signal writing to a pixel is carried out and power consumption can be provided. According to an active matrix display device of the inven tion, in the case a signal to be written to a pixel row is identical with a signal stored in the pixel row, the scan line driver circuit does not output a selecting pulse to a scan line corresponding to the pixel row, and the signal line driver circuit makes the signal lines in a floating State or keeps without changing the state of the signal line from the previous state as as As a a an as as f O 2

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