Patent ID: 7324079
Filing Date: 2008-01-29
Classification: G09G

Abstract:
1. An image display device displaying an image in accordance with an image signal, comprising: a plurality of pixel display elements arranged in a plurality of rows and columns and each performing gradation display in accordance with an applied gradation potential; a plurality of scanning lines provided corresponding to said plurality of rows respectively; a plurality of data lines provided corresponding to said plurality of columns respectively; a vertical scanning circuit successively selecting a scanning line from said plurality of scanning lines for a prescribed time period and activating each pixel display element corresponding to the selected scanning line; and a horizontal scanning circuit providing a gradation potential to each pixel display element activated by said vertical scanning circuit in accordance with said image signal; wherein said horizontal scanning circuit includes a precharge circuit setting each data line to a predetermined precharge potential, a potential generating circuit generating a plurality of gradation potentials different from one another, a first current amplifier circuit provided corresponding to each gradation potential higher than said precharge potential among said plurality of gradation potentials, outputting a potential equal to the corresponding gradation potential, and having charging capability higher than discharging capability, a second current amplifier circuit provided corresponding to each gradation potential lower than said precharge potential among said plurality of gradation potentials, outputting a potential equal to the corresponding gradation potential, and having discharging capability higher than charging capability, and a selection circuit selecting one gradation potential out of said plurality of gradation potentials for each data line in accordance with said image signal and providing to each data line set to said precharge potential, an output potential of said first or second current amplifier circuit corresponding to the selected gradation potential selected for that data line and providing the gradation potential selected for each data line to the activated pixel display element through the data line.