# US 10,121,409 B2 · Display device, method of controlling display device, and program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,409 B2 - Document ID: US10121409B2 - Status: Granted - Kind: B2 - Application number: 15/369,418 - Filed: 2016-12-05 - Published: 2017-06-22 - Granted: 2018-11-06 - Earliest claimed: 2015-12-21 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Yutaka Fujimaki; Yuichi Kunitomo - Web page: https://patentgrep.com/patent/US10121409B2 ## CPC - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - G09G 3/003: {to produce spatial visual effects} - G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)} - G06F 3/147: using display panels - G09G 3/3406: {Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336)} - G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes - G09G 2320/0276: for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction - G09G 2320/041: Temperature compensation - G09G 2320/0626: for control of overall brightness - G09G 2340/0428: Gradation resolution change - 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) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract An HMD worn by a user to use includes a right display unit and a left display unit, an image display section for making a right eye of the user visually recognize an image based on light emitted by the right display unit and making a left eye of the user visually recognize an image based on light emitted by the left display unit, temperature sensors for detecting respective temperatures of the right display unit and the left display unit, and a control section for controlling the luminance of at least either one of the light display unit and the left display unit based on the temperatures detected by the temperature sensors. ## Claims ### Claim 1 A display device worn by a user to use, comprising: a first picture element and a second picture element each generating picture light; a display section adapted to make a right eye of the user visually recognize an image based on the picture light generated by the first picture element, and make a left eye of the user visually recognize an image based on the picture light generated by the second picture element; a temperature detection section adapted to detect temperature of each of the first picture element and the second picture element; and a control section adapted to control luminance of the picture light generated by at least either one of the first picture element and the second picture element based on the temperature detected by the temperature detection section. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the control section performs control of conforming the luminance of the picture light generated by the first picture element and the luminance of the picture light generated by the second picture element to lower one of the luminance of the picture light generated by the first picture element and the luminance of the picture light generated by the second picture element based on the temperatures of the first picture element and the second picture element. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the control section performs control of conforming the luminance of the picture light generated by the first picture element and the luminance of the picture light generated by the second picture element to lower one of the luminance of the picture light generated by the first picture element and the luminance of the picture light generated by the second picture element in a case in which either one of the temperatures of the first picture element and the second picture element becomes one of equal to and higher than a threshold value. ### Claim 4 (depends on 2) The display device according to claim 2, wherein the control section performs control of conforming the luminance of the picture light generated by the first picture element and the luminance of the picture light generated by the second picture element to luminance corresponding to illuminance of outside light of the display section based on the temperatures of the first picture element and the second picture element. ### Claim 5 (depends on 4) The display device according to claim 4, wherein the display section has a configuration of making the user visually recognize the image based on the picture light generated by the first picture element and the image based on the picture light generated by the second picture element, and transmitting an outside scenery to make the user visually recognize the outside scenery, and the control section performs control of conforming the luminance of the picture light generated by the first picture element and the luminance of the picture light generated by the second picture element to the luminance corresponding to the illuminance of the outside light transmitted through the display section. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the display section is provided with an optical section adapted to guide the picture light generated by the first picture element to the right eye of the user and guide the picture light generated by the second picture element to the left eye of the user. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the first picture element and the second picture element are respectively located on sides of a head of the user. ### Claim 8 (depends on 7) The display device according to claim 7, wherein the control section performs control of decreasing the luminance of the picture light generated by at least either one of the first picture element and the second picture element in a case in which at least either one of the temperatures of the first picture element and the second picture element becomes one of equal to and higher than a threshold value determined based on an influence on a body of the user. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the first picture element and the second picture element are each provided with a panel on which a light emitting member is mounted, and the temperature detection section is disposed on a back side of the light emitting member so as to have contact with the panel. ### Claim 10 (depends on 9) The display device according to claim 9, wherein the first picture element and the second picture element are each provided with the panel adapted to output image light including a plurality of colored light beams and a drive section adapted to drive the panel, and the temperature detection section is mounted on the drive section to detect temperature of the panel. ### Claim 11 (depends on 10) The display device according to claim 10, further comprising: a storage section adapted to store a correction parameter used to correct a gamma value of the image light emitted by the panel for each temperature value of the panel, wherein the control section controls the luminance of the picture light generated by at least either one of the first picture element and the second picture element based on the temperature detected by the temperature detection section, and performs gamma correction of the panel using the correction parameter corresponding to the temperature detected by the temperature detection section. ### Claim 12 (depends on 1) The display device according to claim 1, wherein the first picture element and the second picture element are each provided with a light source section, a modulation device adapted to modulate light emitted by the light source section to output image light including a plurality of colored light beams, and a modulation device drive section adapted to drive the modulation device, and the temperature detection section is mounted together with the modulation device drive section. ### Claim 13 A method of controlling a display device, comprising: providing the display device worn by a user to use and including a first picture element and a second picture element each generating picture light, and a display section adapted to make a right eye of the user visually recognize an image based on the picture light generated by the first picture element, and make a left eye of the user visually recognize an image based on the picture light generated by the second picture element; detecting temperature of each of the first picture element and the second picture element; and controlling luminance of the picture light generated by at least either one of the first picture element and the second picture element based on the temperature detected. ### Claim 14 A display device worn by a user to use, comprising: a first picture element generating a first picture light; a display section adapted to make an eye of the user visually recognize an image based on the first picture light; a first temperature detection section adapted to detect a first temperature of the first picture element; and a control section adapted to control luminance of the first picture light based on the first temperature detected by the first temperature section, wherein the display device is a head-mounted display device. ### Claim 15 (depends on 14) The display device according to claim 14, further comprising: a second picture element generating a second picture light; and a second temperature detection section adapted to detect a second temperature of the second picture element, wherein a display section is adapted to make another eye of the user visually recognize an image based on the second picture light generated by the second picture element, and the control section is adapted to control luminance of the second picture light generated by the second picture element based on the second temperature detected by the second temperature detection section.