# US 10,373,573 B2 · Display device and data compensating method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,373,573 B2 - Document ID: US10373573B2 - Status: Granted - Kind: B2 - Application number: 15/708,964 - Filed: 2017-09-19 - Published: 2018-05-31 - Granted: 2019-08-06 - Earliest claimed: 2016-11-30 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: YoungKyung Kim; JoungTae Kim - Web page: https://patentgrep.com/patent/US10373573B2 ## CPC - G09G 3/3607: {for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127)} - G02B 6/0051: {Diffusing sheet or layer} - G02B 6/0053: {Prismatic sheet or layer; Brightness enhancement element, sheet or layer} - G02B 6/0091: {of the light source relative to the light guide (G02B6/0021 takes precedence)} - G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)} - G09G 5/00: Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators (image data processing or generation, in general G06T) - G09G 5/026: {Control of mixing and/or overlay of colours in general (G09G5/022 and G09G5/024 take precedence)} - G09G 5/06: using colour palettes, e.g. look-up tables - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/041: Temperature compensation - G09G 2320/0666: for control of colour parameters, e.g. colour temperature - G09G 2320/08: Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A display device and a data compensating method thereof are disclosed. The display device includes: a liquid crystal display panel having a plurality of pixels; a color temperature compensation unit configured to determine a color temperature at each position of a light guide plate using a thermal conductivity of the light guide plate and a color temperature at a reference position of the light guide plate, and determine a color temperature compensation value at positions of the light guide plate using the color temperature; and a timing controller configured to correct at least one of an R gain value and a B gain value of the image data using the color temperature compensation value. ## Claims ### Claim 1 A display device, comprising: a liquid crystal display panel that includes a plurality of pixels; a light guide plate that includes a plurality of positions and that transmits light from a light source to the liquid crystal display panel, the light guide plate having a thermal conductivity and a reference position; a color temperature compensation unit configured to determine a color temperature at one or more positions of the light guide plate using the thermal conductivity of the light guide plate and a color temperature at the reference position of the light guide plate, and determine a color temperature compensation value at each of the one or more positions of the light guide plate based at least in part on the color temperature; and a timing controller configured to correct at least one of an R gain value or a B gain value of image data displayed in at least one of the plurality of pixels based at least in part on the color temperature compensation value; wherein the at least one of the R gain value or the B gain value is differently corrected according to a distance of each of the one or more positions of light guide plate spaced apart from the light source. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the color temperature compensation unit determines the color temperature compensation value to increase the R gain value and the B gain value in an area of the light guide plate where the color temperature is higher than the reference position, and the color temperature compensation unit calculates the color temperature compensation value to decrease the R gain value in an area of the light guide plate where the color temperature is lower than the reference position. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the color temperature compensation unit determines the color temperature compensation value by reflecting a change of the color temperature based at least in part on a distance between the light guide plate and the light source. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the color temperature compensation unit is configured to determine the color temperature at one or more positions of the light guide plate by performing one or more calculations based at least in part on the thermal conductivity of the light guide plate and the color temperature at the reference position. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the color temperature compensation unit is configured to determine the color temperature compensation value at each of the one or more positions of the light guide plate by performing one or more calculations based at least in part on the color temperature. ### Claim 6 (depends on 5) The display device according to claim 5, wherein the one or more calculations to determine the color temperature compensation value at each of the one or more positions are based at least in part on a distance from the reference position to each respective one of the one or more positions. ### Claim 7 (depends on 1) The display device according to claim 1 further comprising: one or more optical sheets that are disposed on a top surface of the light guide plate. ### Claim 8 (depends on 7) The display device according to claim 7, wherein the one or more optical sheets include at least one diffusion sheet that disperses light incident from the light guide plate. ### Claim 9 (depends on 7) The display device according to claim 7, wherein the one or more optical sheets include an upper prism sheet and a lower prism sheet that distribute light on the liquid crystal display panel. ### Claim 10 A data compensating method of a display device, the method comprising: determining a color temperature at each position of a light guide plate using a thermal conductivity of the light guide plate that transmits light from a light source to a liquid crystal display panel and a color temperature at a reference position of the light guide plate; determining a color temperature compensation value at one or more positions of the light guide plate using a difference in color temperature between the reference position and each of the one or more positions; and correcting at least one of an R gain value or a B gain value of image data displayed in at least one of the plurality of pixels based at least in part on the color temperature compensation value; wherein the at least one of the R gain value or the B gain value is differently corrected according to a distance of each of the one or more positions of light guide plate spaced apart from the light source. ### Claim 11 (depends on 10) The method of claim 10, wherein correcting includes, for a pixel corresponding to an area of the light guide plate where the color temperature is higher than the reference position, increasing the R gain value and the B gain value, and for a pixel corresponding to an area of the light guide plate where the color temperature is lower than the reference position, decreasing the R gain value. ### Claim 12 (depends on 10) The method of claim 10, wherein determining includes changing the color temperature based at least in part on a distance between the light guide plate and the light source is reflected. ### Claim 13 (depends on 10) The method of claim 10, wherein determining the color temperature at each position of the light guide plate further comprises performing one or more calculations based at least in part on the thermal conductivity of the light guide plate and the color temperature at the reference position. ### Claim 14 (depends on 10) The method of claim 10, wherein determining a color temperature compensation value at one or more positions further comprises performing one or more calculations based at least in part on the color temperature. ### Claim 15 (depends on 14) The method of claim 14, wherein the one or more calculations are based at least in part on a distance from the reference position to each respective one of the one or more positions. ### Claim 16 (depends on 10) The method of claim 10 further comprising: dispersing light incident from the light guide plate using at least one diffusion sheet. ### Claim 17 (depends on 10) The method of claim 10 further comprising: distributing light on the liquid crystal display panel using at least one of an upper prism sheet and a lower prism sheet. ### Claim 18 A display device, comprising: a liquid crystal display panel that includes a plurality of pixels; a light guide plate that includes a plurality of positions and that transmits light from a light source to the liquid crystal display panel, the light guide plate having a thermal conductivity and a reference position; a color temperature compensation unit configured to determine a color temperature at one or more positions of the light guide plate using the thermal conductivity of the light guide plate and a color temperature at the reference position of the light guide plate, and determine a color temperature compensation value at each of the one or more positions of the light guide plate based at least in part on the color temperature; and a timing controller configured to correct at least one of an R gain value and a B gain value of image data displayed in at least one of the plurality of pixels based at least in part on the color temperature compensation value; and wherein the color temperature compensation unit determines the color temperature compensation value to increase the R gain value and the B gain value in an area of the light guide plate where the color temperature is higher than the reference position, and the color temperature compensation unit calculates the color temperature compensation value to decrease the R gain value in an area of the light guide plate where the color temperature is lower than the reference position.