# US 7,612,743 B2 · Electron emission display (EED) with decreased signal distortion and method of driving EED > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,612,743 B2 - Document ID: US7612743B2 - Status: Granted - Kind: B2 - Application number: 11/131,321 - Filed: 2005-05-18 - Published: 2005-12-01 - Granted: 2009-11-03 - Earliest claimed: 2004-05-28 - Assignees: Samsung SDI Co., Ltd. - Inventors: Ji-Won Lee; Duck-Gu Cho - Web page: https://patentgrep.com/patent/US7612743B2 ## CPC - G09G 3/22: using controlled light sources - G09G 3/2014: {by modulation of the duration of a single pulse during which the logic level remains constant} - G09G 2310/0248: Precharge or discharge of column electrodes before or after applying exact column voltages - G09G 2320/0223: Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract An Electron Emission Display (EED) with decreased signal distortion has a data driver to convert data driving signals into display data signals having predetermined data voltage levels and to output the display data signals to data electrode lines. A method of driving the EED includes supplying an auxiliary voltage to the data electrode lines during blanking periods according to subsequent data and supplying the display data signals during active periods between the blanking periods. ## Claims ### Claim 1 A method of driving an Electron Emission Display (EED) having a data driver to convert data driving signals into display data signals having predetermined data voltage levels and to output the display data signals to data electrode lines, the method comprising the steps of: supplying an auxiliary voltage to the data electrode lines during blanking periods according to subsequent data; and supplying the display data signals during active periods between the blanking periods; wherein the step of supplying the auxiliary voltage comprises supplying a mid-level voltage when the subsequent data will be at a high level, and supplying a low-level voltage when the subsequent data will be at a low level. ### Claim 2 (depends on 1) The method of claim 1, wherein an absolute value of the mid-level voltage is lower than a threshold operating voltage of the data electrode lines. ### Claim 3 (depends on 1) The method of claim 1, wherein an absolute value of the mid-level voltage is 50% of the high-level voltage supplied to the data electrode lines. ### Claim 4 (depends on 1) The method of claim 1, wherein the low-level voltage is a ground voltage. ### Claim 5 An Electron Emission Display (EED), comprising: a data driver for converting data driving signals into display data signals having predetermined data voltage levels, and for outputting the display data signals to data electrode lines; a modulator/comparator for modulating sequentially inputted data driving signals into display data signals according to gray scale signals; a high voltage buffer for amplifying the modulated display data signals to data voltage levels necessary to drive the data electrode lines; a subsequent data detector for receiving subsequent data driving signals with respect to the respective data electrode lines; and a multiplexer for outputting one of a mid-level voltage and a low-level voltage to the data electrode lines according to the subsequent data driving signals. ### Claim 6 (depends on 5) The EED of claim 5, wherein the multiplexer supplies an auxiliary voltage to the data electrode lines during blanking periods according to subsequent data, and the high voltage buffer supplies the display data signals to the data electrode lines during active periods between the blanking periods. ### Claim 7 (depends on 6) The EED of claim 6, wherein the multiplexer supplies a mid-level voltage as the auxiliary voltage to the data electrode lines when the subsequent data will be at a high level, and the multiplexer supplies a low-level voltage as the auxiliary voltage to the data electrode lines when the subsequent data will be at a low level. ### Claim 8 (depends on 7) The EED of claim 7, wherein an absolute value of the mid-level voltage is lower than a threshold operating voltage of the data electrode lines. ### Claim 9 (depends on 7) The EED of claim 7, wherein an absolute value of the mid-level voltage is 50% of the high-level voltage supplied to the data electrode lines. ### Claim 10 (depends on 7) The EED of claim 7, wherein the low-level voltage is a ground voltage. ### Claim 11 (depends on 5) The EED of claim 5, wherein the modulator/comparator performs one of Pulse Width Modulation (PWM) and Pulse Amplitude Modulation (PAM) on inputted data driving signals according to gray scale signals so as to generate the display data signals. ### Claim 12 A method of driving an Electron Emission Display (EED), comprising the steps of: (a) converting data driving signals into display data signals having predetermined data voltage levels and outputting the display data signals to data electrode lines; (b) modulating sequentially inputted data driving signals into display data signals according to gray scale signals; (c) amplifying the modulated display data signals to data voltage levels necessary to drive the data electrode lines; (d) receiving subsequent data driving signals with respect to the respective data electrode lines; and (e) outputting one of a mid-level voltage and a low-level voltage to the data electrode lines according to the subsequent data driving signals. ### Claim 13 (depends on 12) The method of claim 12, wherein step (c) comprises supplying the display data signals to the data electrode lines during active periods between the blanking periods. ### Claim 14 (depends on 12) The method of claim 12, wherein step (e) comprises supplying an auxiliary voltage to the data electrode lines during blanking periods according to subsequent data. ### Claim 15 (depends on 14) The method of claim 14, wherein step (e) further comprises supplying a mid-level voltage as the auxiliary voltage to the data electrode lines when the subsequent data will be at a high level, and supplying a low-level voltage as the auxiliary voltage to the data electrode lines when the subsequent data will be at a low level. ### Claim 16 (depends on 15) The method of claim 15, wherein an absolute value of the mid-level voltage is lower than a threshold operating voltage of the data electrode lines. ### Claim 17 (depends on 15) The method of claim 15, wherein an absolute value of the mid-level voltage is 50% of the high-level voltage supplied to the data electrode lines. ### Claim 18 (depends on 15) The method of claim 15, wherein the low-level voltage is a ground voltage. ### Claim 19 (depends on 12) The method of claim 12, wherein step (b) comprises performing one of Pulse Width Modulation (PWM) and Pulse Amplitude Modulation (PAM) on inputted data driving signals according to gray scale signals to generate the display data signals.