Patent ID: 9508276
Filing Date: 2016-11-29
CPC Classification: G09G

Claim Text:
1. A display device comprising: a pixel portion including a plurality of gate lines arranged in a plurality of rows; a first memory device which is a frame memory, the frame memory being capable of storing an nth frame image data (n is a natural number); a second memory device which is a line memory, the line memory being capable of storing an (n+1)th frame image data in an mth row (m is a natural number); a comparator circuit configured to compare the nth frame image data and the (n+1)th frame image data row by row, and generate a plurality of determination data each corresponding to one of the plurality of rows; and a writing control circuit configured to control a selection of the plurality of gate lines row by row in each frame period, based on the plurality of determination data supplied from the comparator circuit, wherein each of the plurality of determination data indicates whether the nth frame image data in one of the plurality of rows and the (n+1)th frame image data in a corresponding row are the same or different, wherein, when one of the plurality of determination data indicates that a first data which is the nth frame image data in the mth row and a second data which is the (n+1)th frame image data in the mth row are the same, the writing control circuit does not select the gate line in the mth row, wherein, when the one of the plurality of determination data indicates that the first data and the second data are different, the writing control circuit selects the gate line in the mth row, wherein the second memory device supplies the (n+1)th frame image data in the mth row to the first memory device so that the nth frame image data in the mth row is overwritten with the (n+1)th frame image data in the mth row in the first memory device, and wherein a number of the plurality of rows is the same as a number of the plurality of determination data which are generated by comparing the nth frame image data and the (n+1)th frame image data.