# US 7,609,880 B2 · Display apparatus and its control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,880 B2 - Document ID: US7609880B2 - Status: Granted - Kind: B2 - Application number: 11/329,033 - Filed: 2006-01-11 - Published: 2006-07-20 - Granted: 2009-10-27 - Earliest claimed: 2005-01-14 - Assignees: Canon Kabushiki Kaisha - Inventors: Yukihiko Sakashita - Web page: https://patentgrep.com/patent/US7609880B2 ## CPC - 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} - H04N 5/57: Control of contrast or brightness - H04N 9/3182: {Colour adjustment, e.g. white balance, shading or gamut (white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607)} - H04N 9/3188: {Scale or resolution adjustment (scaling in general G06T3/40; resolution modifying circuits for displays in general G09G5/391)} - H04N 9/64: Circuits for processing colour signals (H04N9/77 takes precedence; camera processing pipelines for processing colour signals H04N23/84) - H04N 9/73: Colour balance circuits, e.g. white balance circuits or colour temperature control (camera processing pipelines for colour balance H04N23/88) - H04N 21/4318: {by altering the content in the rendering process, e.g. blanking, blurring or masking an image region (image enhancement or restoration in general G06T5/00)} - H04N 21/44008: {involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream (arrangements characterised by components specially adapted for monitoring, identification or recognition of video in broadcast systems H04H60/59)} - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/0271: Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping - G09G 2320/066: for control of contrast - G09G 2320/0686: with two or more screen areas displaying information with different brightness or colours - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract An image display apparatus includes a display device, and a signal processing circuit. In at least one case where an image is displayed by a first image signal which designates a first image having a first region of a predetermined color and a predetermined brightness, the first region has a first width in a predetermined direction, and in at least one case where an image is displayed by a second image signal which designates a second image, which is an image in which average luminance of an entire image is the same as that of the first image, having a second region of the predetermined color and the predetermined brightness, the second region has a second width larger than the first width in the predetermined direction. The brightness of the first region in the image which is displayed by the first image signal is brighter than that of the second region in the image which is displayed by the second image signal, by the signal processing in the signal processing circuit. ## Claims ### Claim 1 An image display apparatus comprising: a display device; and a signal processing circuit, wherein (a) in at least one case where an image is displayed by a first image signal which designates a first image having a first region of a predetermined color and a predetermined brightness, the first region has a first width in a predetermined direction, and (b) in at least one case where an image is displayed by a second image signal which designates a second image, which is an image in which average luminance of an entire image is the same as that of said first image, having a second region of the predetermined color and the predetermined brightness, the second region has a second width larger than the first width in the predetermined direction, the brightness of said first region in said image which is displayed by said first image signal is brighter than that of said second region in said image which is displayed by said second image signal, by the signal processing in said signal processing circuit. ### Claim 2 (depends on 1) An apparatus according to claim 1, further comprising a converting circuit for converting image data on the basis of a control value according to the number of pixels of said predetermined color which are continuous in said predetermined direction.