# US 2019/0356831 A1 · Mobile terminal-based screen light-supplementing photographing method and system, and mobile terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356831 A1 - Document ID: US20190356831A1 - Status: Published application - Kind: A1 - Application number: 16/484,460 - Filed: 2018-01-31 - Published: 2019-11-21 - Earliest claimed: 2017-02-08 - Assignees: TCL Communications (Ningbo) Co., Ltd. - Applicants: TCL Communications (Ningbo) Co., Ltd. - Inventors: Jianqiang CHEN - Web page: https://patentgrep.com/patent/US20190356831A1 ## CPC - H04N 23/63: by using electronic viewfinders - H04N 23/71: Circuitry for evaluating the brightness variation - H04N 23/62: Control of parameters via user interfaces - H04N 23/74: by influencing the scene brightness using illuminating means - H04N 23/80: Camera processing pipelines; Components thereof - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A screen fill light photographing method and system for a mobile terminal includes detecting a first luminance information of a current environment, comparing the same with a luminance threshold, controlling, according to the comparison result, a powered-on or powered-off state of a screen fill light mode; and according to the state of the screen fill light mode, performing corresponding image processing of a photo. ## Claims ### Claim 1 A mobile terminal, comprising: a processor; a memory, configured for storing data and instructions executable by the processor to perform following operations: detecting a first luminance information of a current environment; comparing the first luminance information with a luminance threshold; compensating luminance uniformity of a screen display if the first luminance information is less than the luminance threshold; performing a second image processing procedure to a photo after the luminance uniformity of the screen display is adjusted. ### Claim 2 (depends on 1) The mobile terminal according to claim 1, wherein before the operation of detecting the first luminance information of the current environment, the instructions are executable by the processor to further perform an operation of: setting the luminance threshold of environment luminance, a first environment luminance value, and a second environment luminance value in a camera, wherein the first environment luminance value is less than the second environment luminance value, and the second environment luminance value is less than the luminance threshold. ### Claim 3 (depends on 1) The mobile terminal according to claim 1, wherein after the operation of comparing the first luminance information with a luminance threshold, the instructions are executable by the processor to further perform an operation of: turning off a screen fill light mode if the first luminance information is greater than or equal to the luminance threshold. ### Claim 4 (depends on 3) The mobile terminal according to claim 3, after the operation of turning off the screen fill light mode, the instructions are executable by the processor to further perform an operation of: performing a first image processing procedure to the photo when the screen fill light mode is turned off. ### Claim 5 (depends on 2) The mobile terminal according to claim 2, the operation of compensating the luminance uniformity of the screen display comprises: adjusting the luminance uniformity of the screen display depending on luminance uniformity of the photo as 70% if the first luminance information is less than the first environment luminance value; adjusting the luminance uniformity of the screen display depending on the luminance uniformity of the photo as 60% if the first luminance information is greater than the first environment luminance value and less than the second environment luminance value; adjusting the luminance uniformity of the screen display depending on the luminance uniformity of the photo as 50% if the first luminance information is greater than the second environment luminance value and less than the luminance threshold. ### Claim 6 (canceled) ### Claim 7 (depends on 4) The mobile terminal according to claim 4, wherein the first image processing procedure comprises image processing algorithms of a dark corner processing module. ### Claim 8 (depends on 1) The mobile terminal according to claim 1, wherein an optical filter is in front of a camera when the photo is taken, and lights processed by the optical filter and entered into the camera become lights with luminance uniformity of light source. ### Claim 9 (depends on 8) The mobile terminal according to claim 8, wherein the optical filter is a frosted sheet. ### Claim 10 (depends on 5) The mobile terminal according to claim 5, wherein the luminance uniformity of the screen display is an inverse ratio to the luminance uniformity of the photo. ### Claim 11 A screen fill light photographing method for a mobile terminal, comprising: detecting a first luminance information of a current environment; comparing the first luminance information with a luminance threshold, and controlling an on or off state of a screen fill light mode based on a result of the comparation between the first luminance information and the luminance threshold; performing a corresponding image processing procedure to a photo based on the state of the screen fill light mode. ### Claim 12 (depends on 11) The method according to claim 11, wherein before the step of detecting the first luminance information of the current environment, further comprising: setting the luminance threshold of environment luminance, a first environment luminance value, and a second environment luminance value in a camera; wherein the first environment luminance value is less than the second environment luminance value, and the second environment luminance value is less than the luminance threshold. ### Claim 13 (depends on 12) The method according to claim 12, wherein the step of comparing the first luminance information with a luminance threshold, and controlling an on or off state of a screen fill light mode based on a result of the comparation between the first luminance information and the luminance threshold comprises: comparing the first luminance information with the luminance threshold; turning on the screen fill light mode and displaying a screen display if the first luminance information is less than the luminance threshold; turning off the screen fill light mode if the first luminance information is greater than or equal to the luminance threshold. ### Claim 14 (depends on 12) The method according to claim 12, wherein the step of performing a corresponding image processing procedure to a photo based on the state of the screen fill light mode comprises: performing a first image processing procedure to the photo when the screen fill light mode is turned off; adjusting fill light to a screen display through inverse luminance compensation when the screen fill light mode is turned on and performing a second image processing procedure to the photo after the adjustment is finished. ### Claim 15 (depends on 14) The method according to claim 14, wherein the inverse luminance compensation comprises: displaying a first screen display after the screen display is performed the inverse luminance compensation if the first luminance information is less than the first environment luminance value; displaying a second screen display after the screen display is performed the inverse luminance compensation if the first luminance information is greater than the first environment luminance value and less than the second environment luminance value; displaying a third screen display after the screen display is performed the inverse luminance compensation if the first luminance information is greater than the second environment luminance value and less than the luminance threshold. ### Claim 16 (depends on 14) The method according to claim 14, wherein the first image processing procedure comprises image processing algorithms of a dark corner processing module. ### Claim 17 A screen fill light photographing system for a mobile terminal, comprising: one or more processors; a memory; and one or more programs, stored in the memory and executable by the processor, comprising: a luminance detecting module, configured for detecting a first luminance information of a current environment; a comparing judgment module, configured for comparing the first luminance information with a luminance threshold, and controlling an on or off state of a screen fill light mode based on a result of the comparation between the first luminance information and the luminance threshold; an image processing module, configured for performing a corresponding image processing procedure to a photo based on the state of the screen fill light mode. ### Claim 18 (depends on 17) The system according to claim 17, further comprising: a setting module, configured for setting the luminance threshold of environment luminance, a first environment luminance value, and a second environment luminance value in a camera; wherein the first environment luminance value is less than the second environment luminance value, and the second environment luminance value is less than the luminance threshold. ### Claim 19 (depends on 17) The system according to claim 17, wherein the comparing judgment module comprises: a luminance comparing unit, configured for comparing the first luminance information with the luminance threshold; a screen fill light unit, configured for turning on the screen fill light mode and displaying a screen display if the first luminance information is less than the luminance threshold; a fill light turning off unit, configured for turning off the screen fill light mode if the first luminance information is greater than or equal to the luminance threshold. ### Claim 20 (depends on 19) The system according to claim 19, wherein the image processing module comprises: a first image processing module, configured for performing a first image processing procedure to the photo when the screen fill light mode is turned off; a second image processing module, configured for adjusting fill light to a screen display through inverse luminance compensation when the screen fill light mode is turned on and performing a second image processing procedure to the photo after the adjustment is finished.