Patent ID: 7542016
Filing Date: 2009-06-02
Classification: G09G

Abstract:
1. An Electron Emission Device (EED), comprising: an electron emission display panel including scan electrodes, data electrodes, and anodes, electrons colliding with the anode in accordance with a voltage difference between the scan electrodes and the data electrodes; a discharge current measuring unit adapted to measure a discharge current value of the electron emission display panel; a comparison unit adapted to output control signals proportional to a current difference between the measured discharge current value and an inputted reference value; a scan voltage control unit adapted to amplify an output voltage of sequentially outputted scanning signals to scan electrode lines of the electron emission display panel according to scan driving signals having a predetermined frequency, the scan voltage control unit operating in accordance with the control signals of the comparison unit; a scan driving unit adapted to sequentially supply scan signals having an amplified output voltage to the scan electrode lines, the scan signals having a changed voltage difference between the anode and the scan electrode lines due to the amplified output voltage; and a switch unit arranged between the comparison unit and the scan voltage control unit, the switch unit adapted to be turned on in response to a logic value of a predetermined image data being zero.