# US 10,375,366 B2 · Method and apparatus for controlling screen of terminal device to emit light > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,366 B2 - Document ID: US10375366B2 - Status: Granted - Kind: B2 - Application number: 15/838,365 - Filed: 2017-12-12 - Published: 2018-06-21 - Granted: 2019-08-06 - Earliest claimed: 2016-12-15 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Guosheng Li - Web page: https://patentgrep.com/patent/US10375366B2 ## CPC - G03B 15/03: Combinations of cameras with lighting apparatus; Flash units - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - H04M 1/22: Illumination; Arrangements for improving the visibility of characters on dials - H04N 9/73: Colour balance circuits, e.g. white balance circuits or colour temperature control (camera processing pipelines for colour balance H04N23/88) - H04N 23/56: provided with illuminating means - H04N 23/71: Circuitry for evaluating the brightness variation - H04N 23/74: by influencing the scene brightness using illuminating means - H04N 23/88: for colour balance, e.g. white-balance circuits or colour temperature control - G03B 2215/05: Combinations of cameras with electronic flash units - H04M 2250/12: including a sensor for measuring a physical value, e.g. temperature or motion - H04W 52/027: {by controlling a display operation or backlight unit} - Y02D 30/70: in wireless communication networks - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - 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) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - 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 A method for controlling a screen of a terminal device to emit light includes: determining whether a screen flash lamp function is in an active state when the terminal device is in a photographing mode, wherein the screen flash lamp function enables the screen to serve as a flash lamp; and controlling the screen to emit light as a flash lamp according to a first color temperature correction scheme if the screen flash lamp function is in the active state, wherein the first color temperature correction scheme is configured to adjust a color temperature of the screen from an original color temperature to a target color temperature, and wherein the original color temperature is a color temperature when the screen emits light without color shift correction. ## Claims ### Claim 1 A method for controlling a screen of a terminal device to emit light, comprising: determining whether a screen flash lamp function is in an active state when the terminal device is in a photographing mode, wherein the screen flash lamp function enables the screen to serve as a flash lamp; and controlling the screen to emit light as a flash lamp according to a first color temperature correction scheme if the screen flash lamp function is in the active state, wherein the first color temperature correction scheme is configured to adjust a color temperature of the screen from an original color temperature to a target color temperature, and wherein the original color temperature is a color temperature when the screen emits light without color shift correction, wherein the controlling the screen to emit light as a flash lamp according to a first color temperature correction scheme if the screen flash lamp function is in the active state comprises: determining a grayscale voltage for each color channel of the screen according to the first color temperature correction scheme; and controlling the screen to emit light as a flash lamp using the determined grayscale voltages. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: displaying a color temperature setting interface, the color temperature setting interface comprising at least two options, and each of the options corresponding to a candidate color temperature correction scheme; acquiring a selection indication for a target option; and determining the candidate color temperature correction scheme corresponding to the target option as the first color temperature correction scheme. ### Claim 3 (depends on 2) The method according to claim 2, wherein the candidate color temperature correction schemes comprise at least two of: a natural light color temperature correction scheme for adjusting the color temperature of the screen so that the screen emits a natural light; a warm light color temperature correction scheme for adjusting the color temperature of the screen so that the screen emits a warm light which is warmer than the natural light; and a cold light color temperature correction scheme for adjusting the color temperature of the screen so that the screen emits a cold light which is colder than the natural light. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: controlling the screen to emit light according to a second color temperature correction scheme after the screen flash lamp function is switched from the active state to an inactive state, wherein the second color temperature correction scheme is configured for ensuring that an interface display effect of the screen meets a preset requirement. ### Claim 5 (depends on 1) The method according to claim 1, further comprising: acquiring the original color temperature and the target color temperature of the screen; determining a target color channel of the screen to be adjusted according to the original color temperature and the target color temperature of the screen; adjusting a grayscale voltage for the target color channel so that the color temperature meets the target color temperature when the screen emits light; and generating the first color temperature correction scheme according to respective current grayscale voltages of the color channels of the screen after the adjusting. ### Claim 6 An apparatus for controlling a screen of a terminal device to emit light, comprising: a processor, and a memory, configured to store executable instruction of the processor; wherein, the processor is configured to: determine whether a screen flash lamp function is in an active state when the terminal device is in a photographing mode, wherein the screen flash lamp function enables the screen to serve as a flash lamp; and control the screen to emit light as a flash lamp according to a first color temperature correction scheme if the screen flash lamp function is in the active state, wherein the first color temperature correction scheme is configured to adjust a color temperature of the screen from an original color temperature to a target color temperature, and wherein the original color temperature is a color temperature when the screen emits light without color shift correction, wherein the processor is further configured to: determine a grayscale voltage for each color channel of the screen according to the first color temperature correction scheme; and control the screen to emit light as a flash lamp using the determined grayscale voltages. ### Claim 7 (depends on 6) The apparatus according to claim 6, wherein the processor is further configured to: display a color temperature setting interface, the color temperature setting interface comprising at least two options, and each of the options corresponding to a candidate color temperature correction scheme; acquire a selection indication for a target option; and determine the candidate color temperature correction scheme corresponding to the target option as the first color temperature correction scheme. ### Claim 8 (depends on 7) The apparatus according to claim 7, wherein the candidate color temperature correction schemes comprise at least two of: a natural light color temperature correction scheme for adjusting the color temperature of the screen so that the screen emits a natural light; a warm light color temperature correction scheme for adjusting the color temperature of the screen so that the screen emits a warm light which is warmer than the natural light; and a cold light color temperature correction scheme for adjusting the color temperature of the screen so that the screen emits a cold light which is colder than the natural light. ### Claim 9 (depends on 6) The apparatus according to claim 6, wherein the processor is further configured to: control the screen to emit light according to a second color temperature correction scheme after the screen flash lamp function is switched from the active state to an inactive state, wherein the second color temperature correction scheme is configured for ensuring that an interface display effect of the screen meets a preset requirement. ### Claim 10 (depends on 6) The apparatus according to claim 6, wherein the processor is further configured to: acquire the original color temperature and the target color temperature of the screen; determine a target color channel of the screen to be adjusted according to the original color temperature and the target color temperature of the screen; adjust a grayscale voltage for the target color channel so that the color temperature meets the target color temperature when the screen emits light; and generate the first color temperature correction scheme according to respective current grayscale voltages for the color channels of the screen after the adjusting. ### Claim 11 A non-transitory computer-readable storage medium having stored therein instructions that, when executed by a processor of a terminal device, causes the terminal device to perform a method for controlling a screen of the terminal device to emit light, the method comprising: determining whether a screen flash lamp function is in an active state when the terminal device is in a photographing mode, wherein the screen flash lamp function enables the screen to serve as a flash lamp; and controlling the screen to emit light as a flash lamp according to a first color temperature correction scheme if the screen flash lamp function is in the active state, wherein the first color temperature correction scheme is configured to adjust a color temperature of the screen from an original color temperature to a target color temperature, and wherein the original color temperature is a color temperature when the screen emits light without color shift correction, wherein the controlling the screen to emit light as a flash lamp according to a first color temperature correction scheme if the screen flash lamp function is in the active state comprises: determining a grayscale voltage for each color channel of the screen according to the first color temperature correction scheme; and controlling the screen to emit light as a flash lamp using the determined grayscale voltages.