# US 2019/0170583 A1 · Display device, and method for correcting display state of display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170583 A1 - Document ID: US20190170583A1 - Status: Published application - Kind: A1 - Application number: 16/324,512 - Filed: 2016-09-02 - Published: 2019-06-06 - Earliest claimed: 2016-09-02 - Assignees: NEC Display Solutions, Ltd. - Applicants: NEC Display Solutions Ltd. - Inventors: Naoki ITAKURA - Web page: https://patentgrep.com/patent/US20190170583A1 ## CPC - H05B 45/12: using optical feedback - G01J 1/32: adapted for automatic variation of the measured or reference value (regulation of light intensity G05D25/00) - G01J 3/0262: {Constructional arrangements for removing stray light} - G01J 3/0264: {Electrical interface; User interface} - G01J 3/0267: {Sample holders for colorimetry} - G01J 3/0291: {Housings; Spectrometer accessories; Spatial arrangement of elements, e.g. folded path arrangements} - G01J 3/50: using electric radiation detectors - G01J 3/506: {measuring the colour produced by screens, monitors, displays or CRTs} - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - G09G 3/3225: using an active matrix - G09G 3/36: using liquid crystals - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - H05B 45/14: using electrical feedback from LEDs or from LED modules - G09G 2320/0653: Controlling or limiting the speed of brightness adjustment of the illumination source - G09G 2320/0666: for control of colour parameters, e.g. colour temperature - G09G 2320/0693: Calibration of display systems - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - 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 A display device includes: a display device main body including a display panel and a screen calibration function unit that calibrates a display state of the display panel; and a cover that covers the display panel, the cover including an optical sensor in a surface facing the display panel. The optical sensor measures a screen state of the display panel in a state where the display panel is covered with the cover, and sends a measured value of the optical sensor to the display device main body. The screen calibration function unit calibrates the display state of the display panel by using the measured value. ## Claims ### Claim 1 A display device comprising: a display device main body comprising a display panel and a screen calibration function unit that calibrates a display state of the display panel; and a cover that covers the display panel, the cover comprising an optical sensor in a surface facing the display panel, wherein the optical sensor measures a screen state of the display panel in a state where the display panel is covered with the cover, and sends a measured value of the optical sensor to the display device main body, and the screen calibration function unit calibrates the display state of the display panel by-using the measured value. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the screen calibration function unit executes screen calibration processing according to a set time schedule. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the cover comprises a material having rigidity or comprises a spacer between the cover and a display surface of the display panel, and fixes the cover to the display panel. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the cover is fixed to the display panel with a magnet. ### Claim 5 (depends on 3) The display device according to claim 3, wherein the cover is fixed to the display panel by a hook and loop fastener. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the optical sensor is disposed substantially in a center of the surface of the cover that faces the display panel. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the optical sensor comprises a plurality of optical sensors that are arranged in the surface of the cover that faces the display panel. ### Claim 8 (depends on 1) The display device according to claim 1, further comprising: a connector drawn out from the cover, wherein the connector is connected to the display device main body, and the optical sensor sends the measured value to the display device main body via the connector. ### Claim 9 (depends on 1) The display device according to claim 1, wherein a signal is input and output by non-contact communication between the cover and the display device main body. ### Claim 10 (depends on 1) The display device according to claim 1, wherein a signal is input and output by optical communication between the cover and the display device main body. ### Claim 11 A method for calibrating a display state of a display device comprising a display panel, the method comprising: covering the display panel with a cover; measuring, by an optical sensor, a screen state of the display panel in a state where the display panel is covered with the cover, the optical sensor being provided in a surface of the cover, the surface facing the display panel; sending, by the optical sensor, a measured value of the optical sensor to the display device; and calibrating a display state of the display panel by using the measured value.