# US 12,118,945 B2 · Display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,118,945 B2 - Document ID: US12118945B2 - Status: Granted - Kind: B2 - Application number: 18/545,507 - Filed: 2023-12-19 - Published: 2024-08-01 - Granted: 2024-10-15 - Earliest claimed: 2023-01-27 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Won-Hee Lee; Ji-Woong Park - Web page: https://patentgrep.com/patent/US12118945B2 ## CPC - G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element - G09G 2300/026: Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions - 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 2320/0626: for control of overall brightness - G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve - G09G 2330/021: Power management, e.g. power saving - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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 display apparatus includes a data driving portion having a plurality of driving portions corresponding to a plurality of split regions of a display panel, a gamma voltage portion providing a same gamma voltage set to the plurality of driving portions, and a data processing portion including a data adjustment portion and a maximum dimming signal extraction portion. The data adjustment portion can process a plurality of input image data corresponding to the plurality of split regions to output a plurality of output image data to the plurality of driving portions, and the maximum dimming signal extraction portion can provide a maximum dimming signal among a plurality of dimming signals for the plurality of split regions to the gamma voltage portion. ## Claims ### Claim 1 A display apparatus, comprising: a display panel including a plurality of split regions defined by dividing a screen; a data driving portion including a plurality of driving portions respectively corresponding to the plurality of split regions; a gamma voltage portion configured to provide a same gamma voltage set to the plurality of driving portions; and a data processing portion including a data adjustment portion and a maximum dimming signal extraction portion, wherein the data adjustment portion processes a plurality of input image data respectively corresponding to the plurality of split regions to output a plurality of output image data to the plurality of driving portions, wherein the maximum dimming signal extraction portion provides a maximum dimming signal among a plurality of dimming signals that respectively set luminances of the plurality of split regions to the gamma voltage portion, and wherein the data adjustment portion converts a luminance gain of each of the plurality of split regions obtained based on the maximum dimming signal into a data gain, and applies each data gain to one of the plurality of input image data. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein in a normal mode where the plurality of dimming signals are the same, the data adjustment portion outputs the plurality of input image data as the plurality of output image data through a bypass transmission path, and wherein in a luminance split mode where at least two of the plurality of dimming signals are different from each other, the data adjustment portion applies each data gain to one of the plurality of input image data to output the plurality of output image data. ### Claim 3 (depends on 1) The display apparatus of claim 1, wherein each of the luminance gain and the data gain has K bits, and the input image data has M bits, where K and M are natural numbers, and wherein the data adjustment portion includes: a data operation portion which performs a multiplication of each data gain by each of the plurality of input image data to generate a plurality of intermediate image data of M+K bits; and a bit shift portion which shifts the M+K bits of each of the plurality of intermediate image data by the K bits in a lower bit direction to generates the plurality of output image data of the M bits. ### Claim 4 (depends on 1) The display apparatus of claim 1, wherein the data adjustment portion includes a data gain calculation portion that converts the luminance gain into the data gain according to a gamma value relationship between luminance and data. ### Claim 5 (depends on 4) The display apparatus of claim 4, wherein the data gain calculation portion includes: a luminance gain calculation portion that divides each of the plurality of dimming signals by the maximum dimming signal to calculate the luminance gain; and a luminance gain-data gain conversion portion that converts the luminance gain calculated by the luminance gain calculation portion into the corresponding data gain. ### Claim 6 (depends on 1) The display apparatus of claim 1, wherein the plurality of split regions are arranged along a horizontal line direction of the display panel. ### Claim 7 (depends on 1) The display apparatus of claim 1, wherein the display panel is an organic light emitting display panel. ### Claim 8 A display apparatus, comprising: a display panel including a plurality of split regions defined by dividing a screen; a data driving portion including a plurality of driving portions respectively driving the plurality of split regions; a gamma voltage portion configured to provide a same gamma voltage set to the plurality of driving portions; and a data processing portion that provides a maximum dimming signal among a plurality of dimming signals that respectively correspond to the plurality of split regions to the gamma voltage portion, wherein in a luminance split mode where at least two of the plurality of dimming signals are different from each other, the data processing portion applies each data gain to an input image data of one of the plurality of split regions to output a plurality of output image data to the plurality of driving portions, and wherein the data processing portion converts a luminance gain of each of the plurality of split regions obtained based on the maximum dimming signal into the data gain according to a luminance-data gamma value relationship. ### Claim 9 (depends on 8) The display apparatus of claim 8, wherein in a normal mode where the plurality of dimming signals are the same, the data adjustment portion outputs the plurality of input image data as the plurality of output image data through a bypass transmission path. ### Claim 10 (depends on 8) The display apparatus of claim 8, wherein each of the luminance gain and the data gain has K bits, and the input image data has M bits, where K and M are natural numbers, and wherein the data processing portion performs a multiplication of each data gain by each of the plurality of input image data to generate a plurality of intermediate image data of M+K bits, and shifts the M+K bits of each of the plurality of intermediate image data by the K bits in a lower bit direction to generates the plurality of output image data of the M bits. ### Claim 11 (depends on 8) The display apparatus of claim 8, wherein the data processing portion divides each of the plurality of dimming signals by the maximum dimming signal to calculate the luminance gain. ### Claim 12 (depends on 8) The display apparatus of claim 8, wherein the plurality of split regions are arranged along a horizontal line direction of the display panel. ### Claim 13 (depends on 8) The display apparatus of claim 8, wherein the display panel is an organic light emitting display panel.