# US 12,190,771 B2 · Display system and display method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,190,771 B2 - Document ID: US12190771B2 - Status: Granted - Kind: B2 - Application number: 18/475,284 - Filed: 2023-09-27 - Published: 2024-04-04 - Granted: 2025-01-07 - Earliest claimed: 2022-09-27 - Assignees: JVCKENWOOD Corporation - Applicants: JVCKENWOOD Corporation - Inventors: Eiji Matsumoto - Web page: https://patentgrep.com/patent/US12190771B2 ## CPC - G06F 3/147: using display panels - 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} - G02B 27/017: {Head mounted} - G09G 5/10: Intensity circuits - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2330/027: Arrangements or methods related to powering off a display - G09G 2354/00: Aspects of interface with display user - G09G 2360/144: the light being ambient light - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A display system includes: a display unit that is provided inside a housing mounted on a user's head and that displays an image to the user; a termination detection unit that detects termination of display by the display unit; and an adaptation display determination unit that determines, according to the elapsed time from start to end of display by the display unit, an adaptation display pattern that reduces a difference between an internal illuminance value indicating a brightness inside the housing and an external illuminance value indicating a brightness outside the housing by changing a brightness of the image displayed on the display unit. ## Claims ### Claim 1 A display system comprising: a display unit that is provided inside a housing mounted on a user's head and that displays an image to the user; and a processor, wherein the processor detects termination of display by the display unit, the processor determines an adaptation display pattern that reduces a difference between an internal illuminance value indicating a brightness inside the housing and an external illumination value indicating a brightness outside the housing by changing a brightness of the image displayed on the display unit, the processor calculates an increased display time of the adaptation display pattern corresponding to a larger illuminance difference between the internal illuminance value and the external illuminance value, and wherein the processor determines a time change rate of brightness in the adaptation display pattern to be smaller when the internal illuminance value is larger than the external illuminance value as compared to when the internal illuminance value is smaller than the external illuminance value, such that for illuminance differences of identical magnitude, the processor calculates an increased display time of the adaptation display pattern when the internal illuminance value is larger than the external illuminance value as compared when the internal illuminance value is smaller than the external illuminance value. ### Claim 2 (depends on 1) The display system according to claim 1, wherein the processor measures an elapsed time from start of display by the display unit, and the processor determines the adaptation display pattern according to the elapsed time. ### Claim 3 (depends on 1) The display system according to claim 1, wherein the processor determines the adaptation display pattern further according to an age of the user. ### Claim 4 (depends on 2) The display system according to claim 2, wherein the processor determines the time change rate of brightness in the adaptation display pattern according to at least one of the elapsed time and an age of the user. ### Claim 5 (depends on 1) The display system according to claim 1, wherein that the processor estimates a fatigue level of the user, and the processor determines the adaptation display pattern according to the fatigue level estimated by the fatigue estimation unit. ### Claim 6 (depends on 5) The display system according to claim 5, wherein the processor estimates the fatigue level of the user based on a brightness of the image displayed on the display unit. ### Claim 7 (depends on 5) The display system according to claim 5, wherein the processor estimates the fatigue level of the user based on a movement of a content included in the image displayed on the display unit. ### Claim 8 (depends on 5) The display system according to claim 5, wherein the processor estimates the fatigue level of the user based on at least one of an age of the user and an elapsed time from start to termination of display by the display unit. ### Claim 9 A display method comprising: displaying an image in a display unit provided inside a housing mounted on a user's head; detecting termination of display by the display unit; determining an adaptation display pattern that reduces a difference between an internal illuminance value indicating a brightness inside the housing and an external illuminance value indicating a brightness outside the housing by changing a brightness of the image displayed on the display unit; calculating an increased display time of the adaptation display pattern corresponding to a larger illuminance difference between the internal illuminance value and the external illuminance value, and determining a time change rate of brightness in the adaptation display pattern to be smaller when the internal illuminance value is larger than the external illuminance value as compared to when the internal illuminance value is smaller than the external illuminance value, such that for illuminance differences of identical magnitude, calculating an increased display time of the adaptation display pattern when the internal illuminance value is larger than the external illuminance value as compared when the internal illuminance value is smaller than the external illuminance value. ### Claim 10 A non-transitory recording medium encoded with a program, the program comprising computer-implemented modules including: a module that displays an image on a display unit provided inside a housing mounted on a user's head; a module that detects termination of display by the display unit; a module that determines an adaptation display pattern that reduces a difference between an internal illuminance value indicating a brightness inside the housing and an external illuminance value indicating a brightness outside the housing by changing a brightness of the image displayed on the display unit; a module that calculates an increased display time of the adaptation display pattern corresponding to a larger illuminance difference between the internal illuminance value and the external illuminance value, and a module that determines a time change rate of brightness in the adaptation display pattern to be smaller when the internal illuminance value is larger than the external illuminance value as compared to when the internal illuminance value is smaller than the external illuminance value, such that for illuminance differences of identical magnitude, calculates an increased display time of the adaptation display pattern when the internal illuminance value is larger than the external illuminance value as compared when the internal illuminance value is smaller than the external illuminance value.