Patent ID: 7898507
Filing Date: 2011-03-01
Classification: G09G

Abstract:
1. A display device which displays image information based on display data comprising: a display panel which includes a plurality of signal lines and a plurality of scanning lines situated in directions mutually intersecting each other, a plurality of display pixels including current control type light emitting devices and active devices positioned near intersecting points of the plurality of signal lines and the plurality of scanning lines, wherein one end of a current path between a source and a drain of each of the active devices is connected to one end of a respective one of the light emitting devices, the display panel further including a plurality of power supply lines to which one of a first power supply voltage and a second power supply voltage, which is different in an electric potential from the first power supply voltage, is applied for setting an operating state of the light emitting devices, wherein each of the plurality of power supply lines is connected to the other end of the current path of respective active devices; a scan driver circuit which applies a scanning signal to each of the plurality of scanning lines and sets the display pixels connected to the scanning lines in a selective state; a signal driver circuit which generates gradation current based on display data luminosity gradation component, wherein the gradation current is supplied to the display pixels set in the selective state by the scan driver circuit via each of the plurality of signal lines; a precharge circuit which applies a precharge voltage to each of the plurality of signal lines and sets a capacity component attached to each of the plurality of signal lines in a predetermined charged state; a power supply driver which supplies the first or second power supply voltage to the plurality of power supply lines; and an operation control circuit which controls setting of the display pixels in a non-selective state by the scan driver circuit and which applies, by the power supply driver, the first power supply voltage that sets the light emitting devices in a non-light emitting state, when the capacity component is set in the predetermined charged state by the precharge circuit, and which controls setting of the display pixels in the non-selective state by the scan driver circuit and which applies, by the power supply driver, the second power supply voltage that sets the light emitting devices in a light emitting state, when the light emitting devices are set in the light emitting state; wherein the scan driver circuit generates and outputs a precharge control signal which controls an operating state of the precharge circuit.