US 6,982,684 B2
Brightness compensating low power display device and controller
Moriyuki Tsuchihashi, Sagamihara (Japan)
Assigned to International Business Machines Corporation, Armonk, N.Y. (US)
Filed on Apr. 23, 2003, as Appl. No. 10/421,966.
Claims priority of application No. 2002-121329 (JP), filed on Apr. 23, 2002.
Prior Publication US 2003/0222865 A1, Dec. 04, 2003
Int. Cl. G09G 3/20 (2006.01)
U.S. Cl. 345—55 11 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a display panel having a plurality of pixels arranged in a horizontal scanning direction and a vertical scanning direction;
a voltage controller, coupled to said display panel, which outputs a driving voltage to each of the plurality of pixels;
said voltage controller outputting to the plurality of pixels in said display panel a different polarity of the driving voltage for every predefined line number in the vertical scanning direction; and
a brightness controller, operatively coupled to said display panel, which corrects a brightness for each of the plurality of pixels dependent on the pixel's position in the vertical scanning direction in said display panel, based on a driving voltage;
said brightness controller correcting the brightness of each of the plurality of pixels depending on the position of the pixel in the predefined line number.