Patent ID: 8294662
Filing Date: 2012-10-23
Classification: G09G

Abstract:
1. A scan line driving circuit included in a display panel of an electro-optical device that has a plurality of scan lines divided into blocks each having p (where p is an integer equal to or greater than two) lines, a plurality of data lines, and pixels provided in correspondence with intersections of the plurality of scan lines and the plurality of data lines and having gray scale levels in accordance with data signals supplied to the corresponding data lines in a case where logic levels of the corresponding scan lines become an active level, wherein the scan line driving circuit sequentially selects the plurality of scan lines of the electro-optical device in a predetermined order and changes the logic level of the selected scan line into the active level, the scan line driving circuit comprising: an address signal output circuit that sequentially selects the blocks one by one and supplies an address signal having the active level in a period for selecting the p scan lines belonging to the selected block to output lines corresponding to the blocks; a demultiplexer that sequentially selects the p scan lines belonging to the selected block one by one, connects the selected scan line of the selected block to an output line corresponding to the selected block, and does not connect the scan lines of the selected block, which are not selected, to the output line corresponding to the selected block, the demultiplexer including a plurality of first switches provided in correspondence with the plurality of scan lines, the plurality of first switches being supplied with a plurality of selection signals; and a plurality of second switches that are provided in correspondence with the plurality of scan lines, each having one end being connected to a scan line corresponding thereto and the other end being commonly grounded at a non-active logic level of the scan lines and are turned on in a part of or a whole period during which all the plurality of scan lines are not selected, wherein the plurality of first switches are turned on in accordance with the selection signals and turned on in the part of or the whole period during which all the plurality of scan lines are not selected.