# US 2014/0191931 A1 · Flat panel display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191931 A1 - Document ID: US20140191931A1 - Status: Published application - Kind: A1 - Application number: 13/939,017 - Filed: 2013-07-10 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd - Inventors: Yang-Wan KIM - Web page: https://patentgrep.com/patent/US20140191931A1 ## CPC - G09G 3/3685: {Details of drivers for data electrodes} - G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements - G09G 2310/0297: Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns - 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 A flat panel display device includes a pixel unit having scan-lines, data-lines, and first through third pixels that are coupled to the scan-lines and the data-lines, a scan driver that applies a scan signal to the pixel unit, a data driver that selectively applies a first data signal, a second data signal, a third data signal, and an initialization signal to the pixel unit, a demultiplexing unit having at least one demultiplexer that applies the first data signal, the second data signal, and the third data signal to the first pixels, the second pixels, and the third pixels, respectively, and that simultaneously applies the initialization signal to the first through third pixels, and a timing control unit that controls the scan driver, the data driver, and the demultiplexing unit. ## Claims ### Claim 1 A flat panel display device comprising: a pixel unit having scan-lines, data-lines, and first through third pixels that are coupled to the scan-lines and the data-lines; a scan driver configured to apply a scan signal to the pixel unit; a data driver configured to selectively apply a first data signal, a second data signal, a third data signal, and an initialization signal to the pixel unit; a demultiplexing unit configured to apply the first data signal, the second data signal, and the third data signal to the first pixels, the second pixels, and the third pixels, respectively, and to simultaneously apply the initialization signal to the first through third pixels, the demultiplexing unit having at least one demultiplexer; and a timing control unit configured to control the scan driver, the data driver, and the demultiplexing unit. ### Claim 2 (depends on 1) The device of claim 1, further comprising: a plurality of capacitors configured to store respective voltages corresponding to the first data signal, the second data signal, the third data signal, and the initialization signal, the capacitors being coupled to the data-lines, respectively. ### Claim 3 (depends on 1) The device of claim 1, wherein a voltage level of the initialization signal is smaller than or equal to respective voltage levels of the first data signal, the second data signal, and the third data signal. ### Claim 4 (depends on 1) The device of claim 1, wherein the data driver directly applies at least one of the first data signal, the second data signal, and the third data signal to the pixel unit. ### Claim 5 (depends on 1) The device of claim 1, wherein the demultiplexer includes: a plurality of switches configured to perform a coupling operation between the data driver and the data-lines based on a control signal output from the timing control unit; and a plurality of control-lines configured to apply the control signal to the switches. ### Claim 6 (depends on 1) The device of claim 1, wherein the timing control unit controls the data driver and the demultiplexing unit to simultaneously apply the initialization signal to the first through third pixels to initialize the data-lines coupled to the first through third pixels, and to sequentially apply the first data signal, the second data signal, and the third data signal to the first pixels, the second pixels, and the third pixels, respectively, during one horizontal period. ### Claim 7 (depends on 6) The device of claim 6, wherein the timing control unit controls the scan driver to apply the scan signal to the first through third pixels after the data-lines are initialized, during the one horizontal period. ### Claim 8 A flat panel display device comprising: a pixel unit having scan-lines, data-lines, and first through third pixels that are coupled to the scan-lines and the data-lines; a scan driver configured to apply a scan signal to the pixel unit; a data driver configured to selectively apply a first data signal, a second data signal, a third data signal, and an initialization signal to the pixel unit; a demultiplexing unit configured to apply the first data signal, the second data signal, and the third data signal to the first pixels, the second pixels, and the third pixels, respectively, and to selectively apply the initialization signal to the first through third pixels, the demultiplexing unit having at least one demultiplexer; and a timing control unit configured to control the scan driver, the data driver, and the demultiplexing unit. ### Claim 9 (depends on 8) The device of claim 8, further comprising: a plurality of capacitors configured to store respective voltages corresponding to the first data signal, the second data signal, the third data signal, and the initialization signal, the capacitors being coupled to the data-lines, respectively. ### Claim 10 (depends on 8) The device of claim 8, wherein a voltage level of the initialization signal is smaller than or equal to respective voltage levels of the first data signal, the second data signal, and the third data signal. ### Claim 11 (depends on 8) The device of claim 8, wherein the data driver directly applies at least one of the first data signal, the second data signal, and the third data signal to the pixel unit. ### Claim 12 (depends on 8) The device of claim 8, wherein the demultiplexer includes: a plurality of switches configured to perform a coupling operation between the data driver and the data-lines based on a control signal output from the timing control unit; and a plurality of control-lines configured to apply the control signal to the switches. ### Claim 13 (depends on 8) The device of claim 8, wherein the timing control unit controls the data driver and the demultiplexing unit to apply the first data signal to the first pixels, to apply the initialization signal to the first pixels to initialize the data-lines coupled to the first pixels, to apply the second data signal to the second pixels, to apply the initialization signal to the second pixels to initialize the data-lines coupled to the second pixels, to apply the third data signal to the third pixels, and to apply the initialization signal to the third pixels to initialize the data-lines coupled to the third pixels, during one horizontal period. ### Claim 14 (depends on 13) The device of claim 13, wherein the timing control unit controls the scan driver to apply the scan signal to the first through third pixels after at least one of the data-lines are initialized, during the one horizontal period.