Patent ID: 8736545
Filing Date: 2014-05-27
Classification: G09G

Abstract:
1. An image display device having a memory property comprising: a display section having a plurality of data lines extending in parallel to one another along a first direction, a plurality of scanning lines extending in parallel to one another along a second direction, and a plurality of pixels which are each positioned at an intersection of each of said data lines and each of said scanning lines, said pixels each comprising an electrophoretic display element having a memory property; a data line driving circuit that writes pixel data to each of said data lines based on a given first control signal and a given data signal; a scanning line driving circuit that outputs a scanning line driving signal for driving said scanning lines in predetermined order, based on a given second control signal; and a display/update controlling unit to output said first control signal and said data signal to said data line driving circuit, and said second control signal to said scanning line driving circuit, based on given image data, during an image updating period of time, and to cut off power supply to said data line driving circuit and said scanning line driving circuit, during an image holding period of time, wherein said display/update controlling unit, during said image updating period of time, performs a series of processes of inputting compressed image block data having a data configuration which one screen of said image data is divided into a plurality of blocks equivalent to a plurality of divided screens, and compressed for each block, expanding said compressed image block data of a preceding screen and said compressed image block data of a corresponding updating screen inputted, and outputting said data signal for screen update to said data line driving circuit, based on the expanded image block data of said preceding screen and the expanded image block data of said corresponding updating screen, the series of processes being repeated for every block.