DISPLAY DRIVER IC HAVING EMBEDDED DRAM
A display driver IC for controlling display of an image on a display panel is provided with a DRAM and a driver circuit. The DRAM has a plurality of memory cells and stores digital data corresponding to the image. The driver circuit converts the digital data into a gray-scale voltage and outputs the gray-scale voltage to the display panel. The DRAM is configured to store one bit data by using n memory cells of the plurality of memory cells, n being an integer of 2 or more.
1 . A display driver IC for controlling display of an image on a display panel, comprising:
a DRAM having a plurality of memory cells and configured to store digital data corresponding to said image; and
a driver circuit configured to convert said digital data into a gray-scale voltage and to output said gray-scale voltage to said display panel,
wherein said DRAM stores one bit data by using n memory cells of said plurality of memory cells, n being an integer of 2 or more.
2 . The display driver IC according to claim 1 ,
wherein said n is two.
3 . The display driver IC according to claim 2 ,
wherein said two memory cells are connected to a pair of complementary bit lines, respectively, said complementary bit lines being connected to a same sense amplifier.
4 . The display driver IC according to claim 2 ,
wherein said two memory cells are connected to a same bit line.
5 . The display driver IC according to claim 1 ,
wherein in data writing and data reading, said DRAM simultaneously selects n word lines that are respectively connected to said n memory cells.
6 . The display driver IC according to claim 3 ,
wherein said two memory cells are connected to a same word line.
7 . The display driver IC according to claim 6 ,
wherein each of said two memory cells is a 6F 2 cell.
8 . The display driver IC according to claim 6 ,
wherein in data writing and data reading, said DRAM selects only said same word line.