# US 8,786,585 B2 · System and method for adjusting display based on detected environment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,786,585 B2 - Document ID: US8786585B2 - Status: Granted - Kind: B2 - Application number: 13/578,250 - Filed: 2011-02-18 - Published: 2012-12-20 - Granted: 2014-07-22 - Earliest claimed: 2010-02-22 - Assignees: Dolby Laboratories Licensing Corporation - Applicants: Peter W. Longhurst; Eric Kozak - Inventors: Peter W. Longhurst; Eric Kozak - Web page: https://patentgrep.com/patent/US8786585B2 ## CPC - G09G 5/02: characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2360/144: the light being ambient light - 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 In one embodiment the present invention includes a method that adjusts a display device according to a display environment. The method includes sensing the display environment of the display device and generating environment data that corresponds to the display environment. The environment data includes color data. The method further includes adjusting a color appearance model according to the color data, generating a control signal according to the color appearance model having been adjusted, and controlling a backlight of the display device according to the control signal. In this manner, a viewer perceives the images displayed by the display device in the manner intended by the content creator, because the adjustments to the color appearance model compensate for the viewer's physiological response to the display environment. ## Claims ### Claim 1 A method of adjusting a display device according to a display environment, comprising: sensing the display environment of the display device; wherein sensing the display environment comprises sensing the display environment with a first sensor and a second sensor; generating environment data that corresponds to the display environment, wherein the environment data includes color data; wherein the color data comprises first color data and second color data corresponding to the first sensor and the second sensor respectively; adjusting a color appearance model according to the color data; wherein adjusting the color appearance model according to the color data comprises: adjusting the color appearance model according to the first color data and the second color data as a function of distance to the first sensor and to the second sensor; generating a control signal according to the color appearance model having been adjusted; controlling a backlight of the display device according to the control signal; and storing user white point data that differs from reference white point data, wherein the color appearance model is configured to receive reference environment data and the user white point data, and wherein the adjusted color appearance model is configured to generate a target white point data that corresponds to the control signal, further comprising: scaling a front modulator according to the target white point when the target white point exceeds a threshold; and scaling the front modulator according to the threshold when the target white point does not exceed the threshold. ### Claim 2 (depends on 1) The method of claim 1, further comprising: generating light from the backlight in accordance with the backlight being controlled by the control signal. ### Claim 3 (depends on 1) The method of claim 1, wherein the color data includes an adapting white point. ### Claim 4 (depends on 1) The method of claim 1, wherein the color data includes an adapting white point having an X component, a Y component and a Z component. ### Claim 5 (depends on 1) The method of claim 1, wherein the environment data further includes adapting luminance data (La), further comprising: adjusting the color appearance model according to the adapting luminance data. ### Claim 6 (depends on 1) The method of claim 1, further comprising: adjusting the color appearance model according to relative luminance data (Yb), wherein the environment data does not include the relative luminance data. ### Claim 7 (depends on 1) The method of claim 1, further comprising: adjusting the color appearance model according to surround luminance data (S), wherein the environment data does not include the surround luminance data. ### Claim 8 (depends on 1) The method of claim 1, wherein the color appearance model corresponds to a CIECAM02 (International Commission on Illumination 2002 Color Appearance Model). ### Claim 9 (depends on 1) The method of claim 1, wherein sensing the display environment comprises: sensing a color of the display environment. ### Claim 10 (depends on 1) The method of claim 1, wherein adjusting the color appearance model according to the color data comprises: adjusting a whitepoint achromatic response (Aw) of the color appearance model according to the color data. ### Claim 11 (depends on 1) The method of claim 1, wherein adjusting the color appearance model according to the color data comprises: adjusting a degree of adaptation (D) of the color appearance model according to the color data. ### Claim 12 (depends on 1) The method of claim 1, wherein adjusting the color appearance model according to the color data comprises: adjusting an induction factor (n) of the color appearance model according to the color data. ### Claim 13 (depends on 1) The method of claim 1, wherein adjusting the color appearance model according to the color data comprises: adjusting a luminance level adaptation factor (Fl) of the color appearance model according to the environment data. ### Claim 14 (depends on 1) The method of claim 1, further comprising: receiving input video data; and controlling a front modulator according to the input video data such that the backlight and the front modulator display an image corresponding to the input video data. ### Claim 15 (depends on 1) The method of claim 1, wherein the backlight comprises a back modulator, further comprising: receiving input video data; controlling the back modulator and a front modulator according to the input video data such that the back modulator and the front modulator display an image corresponding to the input video data. ### Claim 16 A method of adjusting a display device according to a display environment, comprising: sensing the display environment of the display device; wherein sensing the display environment comprises sensing the display environment with a first sensor and a second sensor;generating environment data that corresponds to the display environment, wherein the environment data includes color data; wherein the color data comprises first color data and second color data corresponding to the first sensor and the second sensor respectively; adjusting a color appearance model according to the color data; wherein adjusting the color appearance model according to the color data comprises: adjusting the color appearance model according to the first color data and the second color data as a function of distance to the first sensor and to the second sensor; generating a control signal according to the color appearance model having been adjusted; controlling a backlight of the display device according to the control signal; and storing user white point data that differs from reference white point data, wherein the color appearance model is configured to receive reference environment data and the user white point data, and wherein the adjusted color appearance model is configured to generate a target white point data that corresponds to the control signal for further adjustments of the display device when the target point exceeds a threshold. ### Claim 17 (depends on 16) The method of claim 16, wherein the method further comprises adjusting a modulator of the display device based on the target white point. ### Claim 18 (depends on 17) The method of claim 17, wherein the method further comprises adjusting a modulator of the display device by a first adjustment technique when the target white point exceeds a threshold and a second adjustment technique when the target white point does not exceed the threshold. ### Claim 19 (depends on 16) The method of claim 16, wherein the further adjustments comprise scaling a modulator of the display device based on the target white point.