# US 2014/0198090 A1 · Organic light-emitting display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0198090 A1 - Document ID: US20140198090A1 - Status: Published application - Kind: A1 - Application number: 13/958,907 - Filed: 2013-08-05 - Published: 2014-07-17 - Earliest claimed: 2013-01-15 - Assignees: Samsung Display Co., Ltd. - Inventors: Jin Woo PARK; Dong Hwan KIM; Ki Myeong EOM - Web page: https://patentgrep.com/patent/US20140198090A1 ## CPC - 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 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3266: Details of drivers for scan electrodes - G09G 2300/0809: Several active elements per pixel in active matrix panels - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - G09G 2310/0283: Arrangement of drivers for different directions of scanning - 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 organic light-emitting display device includes an organic light-emitting display panel displaying an image that includes a plurality of frames, a data driver providing a plurality of data signals, which correspond to the image, to the organic light-emitting display panel, and a gamma voltage generator providing a gamma voltage, which varies in a same period as each of the frames, to the data driver. ## Claims ### Claim 1 An organic light-emitting display device, comprising: an organic light-emitting display panel displaying an image that includes a plurality of frames; a data driver providing a plurality of data signals, which correspond to the image, to the organic light-emitting display panel; and a gamma voltage generator providing a gamma voltage, which varies in a same period as each of the frames, to the data driver. ### Claim 2 (depends on 1) The display device of claim 1, further comprising a power supply providing a first power supply voltage and a second power supply voltage, the second power supply voltage being lower than the first power supply voltage, to the organic light-emitting display panel, wherein: the organic light-emitting display panel includes first through n-th scan lines that are parallel to each other and arranged sequentially, and the first power supply voltage is provided to the organic light-emitting display panel from a side adjacent to the n-th scan line. ### Claim 3 (depends on 2) The display device of claim 2, further comprising a scan driver providing a scan signal that includes a scan-on section and a scan-off section to the scan lines, wherein: the scan-on section is applied sequentially to the scan lines in order of a scan line located closest to the side from which the first power voltage is provided to a scan line located farthest from the side from which the first power voltage is provided, and the gamma voltage gradually decreases within one frame. ### Claim 4 (depends on 2) The display device of claim 2, further comprising a scan driver providing a scan signal that includes a scan-on section and a scan-off section to the scan lines, wherein: the scan-on section is applied sequentially to the scan lines in order of a scan line located farthest from the side from which the first power voltage is provided to a scan line located closest to the side from which the first power voltage is provided, and the gamma voltage gradually increases within one frame. ### Claim 5 (depends on 1) The display device of claim 1, wherein the gamma voltage generator includes: a gamma reference voltage generator generating a gamma reference voltage that varies in a same period as each of the frames, and a gamma voltage divider generating the gamma voltage from the gamma reference voltage. ### Claim 6 (depends on 5) The display device of claim 5, wherein the gamma reference voltage generator generates the gamma reference voltage from a primitive gamma reference voltage that varies in the same period as each of the frames. ### Claim 7 (depends on 6) The display device of claim 6, wherein: the gamma reference voltage includes first through k-th gamma reference voltages arranged in order of highest to lowest electric potential, and the primitive gamma reference voltage has a same electric potential as the first gamma reference voltage. ### Claim 8 (depends on 1) The display device of claim 1, wherein the gamma voltage varies continuously within one period. ### Claim 9 (depends on 1) The display device of claim 1, wherein the gamma voltage varies in a stepped manner within one period. ### Claim 10 (depends on 9) The display device of claim 9, further comprising a scan driver providing a scan signal that includes a scan-on section and a scan-off section, to the organic light-emitting display panel, wherein the gamma voltage does not vary in the scan-on section. ### Claim 11 An organic light-emitting display device, comprising: an organic light-emitting display panel displaying an image that includes a plurality of frames; a data driver providing a plurality of data signals, which correspond to the image, to the organic light-emitting display panel; a scan driver providing a plurality of scan signals to the organic light-emitting display panel in synchronization with a vertical synchronization signal; and a gamma voltage generator providing a gamma voltage that varies in synchronization with the vertical synchronization signal. ### Claim 12 (depends on 11) The display device of claim 11, further comprising a power supply providing a first power supply voltage and a second power supply voltage, the second power supply voltage being lower than the first power supply voltage, to the organic light-emitting display panel, wherein: the organic light-emitting display panel includes first through n-th scan lines placed parallel to each other and arranged sequentially, and the first power supply voltage is provided to the organic light-emitting display panel from a side adjacent to the n-th scan line. ### Claim 13 (depends on 12) The display device of claim 12, further comprising a scan driver providing a scan signal that includes a scan-on section and a scan-off section to the scan lines, wherein: the scan-on section is applied sequentially to the scan lines in order of a scan line located closest to the side from which the first power voltage is provided to a scan line located farthest from the side from which the first power voltage is provided, and the gamma voltage gradually decreases within one period. ### Claim 14 (depends on 12) The display device of claim 12, further comprising a scan driver providing a scan signal that includes a scan-on section and a scan-off section to the scan lines, wherein: the scan-on section is applied sequentially to the scan lines in order of a scan line located farthest from the side from which the first power voltage is provided to a scan line located closest to the side from which the first power voltage is provided, and the gamma voltage gradually increases within one period. ### Claim 15 (depends on 11) The display device of claim 11, wherein the gamma voltage generator includes: a gamma reference voltage generator generating a gamma reference voltage that varies in synchronization with the vertical synchronization signal, and a gamma voltage divider generating the gamma voltage from the gamma reference voltage. ### Claim 16 (depends on 15) The display device of claim 15, wherein the gamma reference voltage generator generates the gamma reference voltage from a primitive gamma reference voltage that varies in synchronization with the vertical synchronization signal. ### Claim 17 (depends on 16) The display device of claim 16, wherein the gamma reference voltage includes first through k-th gamma reference voltages arranged in order of highest to lowest electric potential, wherein the primitive gamma reference voltage has a same electric potential as the first gamma reference voltage. ### Claim 18 (depends on 17) The display device of claim 17, wherein the gamma voltage varies continuously within one period. ### Claim 19 (depends on 18) The display device of claim 18, wherein the gamma voltage varies in a stepped manner within one period. ### Claim 20 (depends on 19) The display device of claim 19, further comprising a scan driver providing a scan signal that includes a scan-on section and a scan-off section to the organic light-emitting display panel, wherein the gamma voltage does not vary in the scan-on section.