Patent ID: 7324123
Filing Date: 2008-01-29
Classification: G09G

Abstract:
1. A display device comprising: a display; a display controller; and a light sensor, wherein the display device has a first display mode and a second display mode, wherein in the first display mode, one frame period is divided into a plurality of subframe periods, each of the plurality of subframe periods is either a lighting period or a non-lighting period, and an n-bit (where n is a natural number equal to or more than 2) gray scale is expressed by the sum total of a lighting time within the one frame period, wherein in the second display mode, the display is operated by a lower clock frequency and a lower driving voltage than in the first display mode, one frame period is either a lighting period or a non-lighting period, and a one-bit gray scale is expressed by the sum total of a lighting time within the one frame period, wherein outside light is received by the light sensor, and the first display mode and the second display mode are controlled by the display controller in accordance with intensity of the outside light, and wherein a plurality of gate signal lines are selected within one gate selection period by dividing one gate selection period into a plurality of sub-gate selection periods and selecting a gate signal line of one row within the sub-gate selection period.