# US 8,542,182 B2 · Video display apparatus and video display method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,542,182 B2 - Document ID: US8542182B2 - Status: Granted - Kind: B2 - Application number: 13/081,401 - Filed: 2011-04-06 - Published: 2011-07-28 - Granted: 2013-09-24 - Earliest claimed: 2008-02-28 - Assignees: Kabushiki Kaisha Toshiba - Applicants: Tomoaki Nakade - Inventors: Tomoaki Nakade - Web page: https://patentgrep.com/patent/US8542182B2 ## CPC - H04N 5/58: in dependence upon ambient light - G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)} - G09G 3/3406: {Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336)} - H04N 21/42202: {environmental sensors, e.g. for detecting temperature, luminosity, pressure, earthquakes} - H04N 21/44: Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs - G09G 2320/0693: Calibration of display systems - G09G 2360/144: the light being ambient light - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - 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 According to an aspect of the invention, a video display apparatus includes: a sensor that measures an external environment to output the external environment; a storing unit that stores a correction value associated with the measured value; a adjusting unit that changes the correction value based on a given operation by a user; and a processor that adjusts a picture quality of a picture to be displayed on a display based on the measured value and the correction value. ## Claims ### Claim 1 A video display apparatus comprising: a sensor that measures an illuminance at the video display apparatus; a picture quality adjusting portion that, while displaying a relation between a plurality of illuminances and a plurality of picture quality adjusting set values and a currently-measured illuminance on a display portion as a graph, changes the picture quality adjusting set value correlated with a selected illuminance selected from the illuminances based on an operation of an operating portion, wherein the graph includes an axis of abscissa indicating the plurality of illuminances and an axis of ordinate indicating the plurality of picture quality adjusting set values; a storing portion that stores, connectedly with the selected illuminance, the picture quality adjusting set value changed by the picture quality adjusting portion; and a picture quality processing portion that adjusts a picture quality of an input video signal by acquiring, according to the currently-measured illuminance, the picture quality adjusting set value correlated with the currently-measured value from the storing portion. ### Claim 2 (depends on 1) The video display apparatus according to claim 1, wherein the picture quality adjusting portion includes: an automatic picture quality adjusting portion configured to determine the picture quality adjusting set value based on the currently-measured value; and a user picture quality adjusting portion configured to display the graph representing the relation between the plurality of illuminances and the plurality of picture quality adjusting set values on the display portion, to allow the user to select one of the plurality of picture quality adjusting set values through the graph, and to change the selected value. ### Claim 3 (depends on 1) The video display apparatus according to claim 1, further comprising: a video processing portion configured to analyze a video type of the input video signal, wherein the automatic picture quality adjusting portion determines the picture quality adjusting set value based also on the analyzed video type. ### Claim 4 A video display apparatus comprising: a sensor that measures an illuminance at the video display apparatus; a display portion; a picture quality adjusting portion that, while displaying a relation between a plurality of illuminances and a plurality of picture quality adjusting set values and a currently-measured illuminance on the display portion as a graph, changes the picture quality adjusting set value correlated with a selected illuminance selected from the illuminances based on an operation of an operating portion, wherein the graph includes an axis of abscissa indicating the plurality of illuminances and an axis of ordinate indicating the plurality of picture quality adjusting set values; a storing portion that stores, connectedly with the selected illuminance, the picture quality adjusting set value changed by the picture quality adjusting portion; and a picture quality processing portion that adjusts a picture quality of an input video signal by acquiring, according to the currently-measured illuminance, the picture quality adjusting set value correlated with the currently-measured value from the storing portion. ### Claim 5 (depends on 4) The video display apparatus according to claim 4, wherein the storing portion stores a backlight brightness as the picture quality adjusting set value, and the picture quality processing portion adjusts the backlight brightness of the display portion as the display adjustment. ### Claim 6 (depends on 4) The video display apparatus according to claim 4, wherein the storing portion stores a gamma setting value of an LCD panel and a contrast of the LCD panel, and the picture quality processing portion adjusts the gamma setting value and the contrast as the display adjustment. ### Claim 7 A video display method comprising: measuring by a sensor an illuminance at the video display apparatus; while displaying a relation between a plurality of illuminances and a plurality of picture quality adjusting set values and a currently-measured illuminance as a graph, changing the picture quality adjusting set value correlated with a selected illuminance selected from the illuminances based on an operation of an operating portion, wherein the graph includes an axis of abscissa indicating the plurality of illuminances and an axis of ordinate indicating the plurality of picture quality adjusting set values; and adjusting a picture quality of an input video signal by acquiring, according to the currently-measured illuminance, the picture quality adjusting set value correlated with the currently-measured value from the storing portion.