Patent ID: 8432418
Filing Date: 2013-04-30
Classification: G09G

Abstract:
1. A signal processing device for supplying a drive voltage signal to a display panel, the display panel including two substrates which oppose each other, electrodes disposed on the respective two substrates, and a plurality of display elements arranged along a scanning line and driven by the drive voltage signal supplied to the electrodes, at least one of the two substrates being transparent, the signal processing device comprising: input means for inputting the drive voltage signal; luminance detecting means for detecting, from a drive voltage signal supplied to a display element inputted by the input means, a luminance level of a pixel displayed by the display element; means for storing a first correction factor for correcting the luminance level of the pixel to be changed by a voltage level difference between a drive voltage signal supplied to the display element and a drive voltage signal supplied to a first adjacent display element adjacent to the display element in a forward direction of the scanning line, and a second correction factor for correcting the luminance level of the pixel to be changed by a voltage level difference between a drive voltage signal supplied to the display element and a second adjacent display element adjacent to the display element in a reverse direction of the scanning line; selecting means for selecting from the storing means a first correction factor and a second correction factor in accordance with a luminance level of a pixel detected by the luminance detecting means; differential computing means for computing, from a drive voltage signal inputted by the input means, a first voltage level difference indicating a voltage level difference between a drive voltage signal supplied to the display element and a drive voltage signal supplied to the first adjacent display element, and a second voltage level difference indicating a voltage level difference between a drive voltage signal supplied to the display element and a drive voltage signal supplied to the second adjacent display element; correction voltage level computing means for computing a first correction voltage level from the first correction factor selected by the selecting means and the first voltage level difference computed by the differential computing means, and a second correction voltage level from the second correction factor selected by the selecting means and the second voltage level difference computed by the differential computing means; and means for adding the first correction voltage level and the second correction voltage level computed by the correction voltage level computing means to the voltage level of a drive voltage signal to be supplied to the display element inputted by the input means, and supplying the resulting level to the display element of the display panel.