# US 2023/0273667 A1 · Display Device and Luminance Control Method Thereof and Mobile Terminal Using the Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0273667 A1 - Document ID: US20230273667A1 - Status: Published application - Kind: A1 - Application number: 18/142,757 - Filed: 2023-05-03 - Published: 2023-08-31 - Earliest claimed: 2020-08-14 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Jong Hee Hwang; Su Jin Kwon - Web page: https://patentgrep.com/patent/US20230273667A1 ## CPC - G06F 1/3265: {Power saving in display device} - G06F 1/1626: {with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]} - G06F 1/1643: {the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615)} - G06F 1/1694: {the I/O peripheral being a single or a set of motion sensors for pointer control or gesture input obtained by sensing movements of the portable computer} - G06F 1/3218: of display devices - G06F 3/0416: {Control or interface arrangements specially adapted for digitisers} - G09G 3/2007: {Display of intermediate tones} - G09G 3/3225: using an active matrix - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3275: Details of drivers for data electrodes - G06F 1/3215: Monitoring of peripheral devices - G06F 1/3296: by lowering the supply or operating voltage - G06F 3/04817: using icons (graphical or visual programming using iconic symbols G06F8/34) - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/043: Preventing or counteracting the effects of ageing - G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve - G09G 2320/0686: with two or more screen areas displaying information with different brightness or colours - G09G 2330/021: Power management, e.g. power saving - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - G09G 2340/0407: Resolution change, inclusive of the use of different resolutions for different screen areas - G09G 2354/00: Aspects of interface with display user - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - 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) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract The present disclosure relates to a display device, a luminance control method thereof, and a mobile terminal using the same. The display device includes a display panel in which a pixel array including at least a first pixel region and a second pixel region are disposed; a touch sensor disposed on the pixel array; a display panel driver configured to write pixel data of an input image to pixels in the first pixel region and the second pixel region; a touch sensor driver configured to drive the touch sensor and detect a touch input on the pixel array to generate touch coordinate data; and a luminance control device configured to lower the luminance of one of the first and second pixel regions in at least some gray scales when the touch input is detected on the pixel array. ## Claims ### Claim 1 A display device comprising: a display panel on which a pixel array including at least a first pixel region and a second pixel region are disposed; a touch sensor on the pixel array; a display panel driver configured to write pixel data of an input image to pixels from the pixel array that are in the first pixel region and the second pixel region; a touch sensor driver configured to drive the touch sensor and detect a touch input on the pixel array to generate touch coordinate data; and a luminance control device configured to control a luminance of the first pixel region and a luminance of the second pixel region, wherein: the luminance control device is configured to lower the luminance of the first pixel region by rolling off the luminance of the second pixel region in a gray scale equal to or greater than a specific gray scale of a maximum frequency among gray scale values of pixel data to be written to the pixels of the second pixel region when the touch input is detected on the second pixel region or, to fix the luminance of the second pixel region to a specific luminance that is less than the luminance of the first pixel region in a gray scale equal to or greater than a specific gray scale of a maximum frequency among gray scale values of pixel data to be written to the pixels of the second pixel region when the touch input is detected on the second pixel region. ### Claim 2 (depends on 1) The display device of claim 1, wherein a pixels per inch (PPI) of the second pixel area is less than a PPI of the first pixel area. ### Claim 3 (depends on 1) The display device of claim 1, wherein the luminance control device is configured to control the luminance of the second pixel region to be less than a luminance of the first pixel region responsive to a number of touch inputs on the second pixel region being greater than or equal to a preset threshold within a predetermined reference time. ### Claim 4 (depends on 1) The display device of claim 1, wherein the touch sensor driver is configured to transmit luminance control data that controls the luminance of the second pixel region to the luminance control device. ### Claim 5 (depends on 3) The display device of claim 3, wherein the luminance control data includes frequency data indicating a number of touch inputs generated on the second pixel region, and touch coordinate data for the touch inputs in the second pixel region. ### Claim 6 (depends on 3) The display device of claim 3, wherein the display panel driver includes: a data driver configured to convert pixel data to be written in the pixels of the second pixel region and the first pixel region into a data voltage to supply the pixel data to the pixels, the data driver and the luminance control device are mounted on a drive integrated circuit (IC), a touch IC on which the touch sensor driver is mounted transmits the luminance control data to the drive IC, and the drive IC includes a pin through which the luminance control data is received. ### Claim 7 (depends on 1) The display device of claim 1, further comprising a host system configured to transmit pixel data of an input image to the display panel driver and receive the touch coordinate data from the touch sensor driver, wherein the display panel driver includes: a data driver configured to convert the pixel data to be written in pixels of the second pixel region and the first pixel region into a data voltage to supply the data to the pixels, the data driver and the luminance control device are mounted on a drive integrated circuit (IC), the host system transmits the luminance control data to the drive IC, and the drive IC includes a pin through which the luminance control data is received. ### Claim 8 A method for controlling luminance of a display device including a display panel in which a pixel array including at least a first pixel region and a second pixel region are disposed, and a touch sensor disposed on the pixel array, the method comprising: writing pixel data of an input image to pixels from the pixel array that are in the first pixel region and the second pixel region; driving the touch sensor and detecting a touch input on the pixel array to generate touch coordinate data; and lowering a luminance of one of the first pixel region or a luminance of the second pixel region responsive to detecting the touch input on the pixel array. ### Claim 9 (depends on 8) The method of claim 8, wherein a pixels per inch (PPI) of the second pixel area is less than a PPI of the first pixel area. ### Claim 10 (depends on 8) The method of claim 8, wherein lowering the luminance of one of the first and second pixel regions responsive to detecting the touch input on the pixel array comprises: lowering the luminance of the second pixel region responsive to detecting the touch input on the second pixel region. ### Claim 11 (depends on 8) The method of claim 8, wherein lowering the luminance of one of the first pixel region or the second pixel region responsive to detecting the touch input on the pixel array comprises: controlling the luminance of the second pixel region to be less than a luminance of the first pixel region responsive to a number of touch inputs on the second pixel region being greater than or equal to a preset threshold within a predetermined reference time. ### Claim 12 (depends on 8) The method of claim 8, wherein the lowering the luminance of one of the first pixel region or the second pixel region responsive to detecting the touch input on the pixel array comprises: lowering the luminance of the first pixel region by rolling off the luminance of the second pixel region in a gray scale equal to or greater than a specific gray scale of a maximum frequency among gray scale values of pixel data to be written to the pixels of the second pixel region. ### Claim 13 (depends on 8) The method of claim 8, wherein lowering the luminance of one of the first and second pixel regions responsive to detecting the touch input on the pixel array comprises: fixing the luminance of the second pixel region to a specific luminance less than the luminance of the first pixel region in a gray scale equal to or greater than a specific gray scale of a maximum frequency among gray scale values of pixel data to be written to the pixels of the second pixel region. ### Claim 14 A mobile terminal comprising: a display panel in which a pixel array including at least a first pixel region and a second pixel region are disposed; a touch sensor disposed on the pixel array; a display panel driver configured to write pixel data of an input image to pixels from the pixel array that are in the first pixel region and the second pixel region; a touch sensor driver configured to drive the touch sensor and detect a touch input on the pixel array to generate touch coordinate data; a sensor configured to sense changes in movement and inclination in real time; a host system connected to the sensor and configured to transmit the pixel data of the input image to the display panel driver, and to receive the touch coordinate data from the touch sensor driver; and a luminance control device configured to control a luminance the first pixel region and a luminance of the second pixel region, wherein the luminance control device is configured to lower the luminance of the second pixel region responsive to detecting the touch input on the second pixel region or, responsive to the mobile terminal being rotated or inverted. ### Claim 15 (depends on 13) The mobile terminal of claim 13, wherein the luminance control device is configured to lower the luminance of the second pixel region responsive to a number of touch inputs is greater than or equal to a preset threshold within a predetermined time. ### Claim 16 (depends on 13) The mobile terminal of claim 13, wherein the luminance control device is configured to lower the second pixel region in a gray scale equal to or greater than a specific gray scale of a maximum frequency among gray scale values of pixel data to be written to pixels of the second pixel region. ### Claim 17 (depends on 13) The mobile terminal of claim 13, wherein the second pixel region has a home button or icon displayed therein.