# US 2019/0320148 A1 · Projection apparatus, control method, and non-transitory storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0320148 A1 - Document ID: US20190320148A1 - Status: Published application - Kind: A1 - Application number: 16/381,724 - Filed: 2019-04-11 - Published: 2019-10-17 - Earliest claimed: 2018-04-13 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Kousei Sugimoto - Web page: https://patentgrep.com/patent/US20190320148A1 ## CPC - H04N 9/3155: {for controlling the light source (light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406)} - H04N 9/3105: {for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators (simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10)} - H04N 9/3147: {Multi-projection systems (video walls G06F3/1446)} - 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: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A projection apparatus, among a plurality of projection apparatuses configured to project a plurality of projection images side by side as a single image, includes a light emission unit, a control unit configured to control the light emission unit to emit a light amount based on brightness of a first image, and a projection unit configured to modulate light emitted from the light emission unit based on the first image and project an image onto a projection plane, wherein the control unit is configured to control the light amount of the light emission unit based on the brightness of a first region of the first image, the first region adjoining a second image projected by another projection apparatus. ## Claims ### Claim 1 A projection apparatus, among a plurality of projection apparatuses configured to project a plurality of projection images side by side as a single image, the projection apparatus comprising: a light emission unit; a control unit configured to control the light emission unit to emit a light amount based on a brightness value of a first image signal; and a projection unit configured to modulate light emitted from the light emission unit based on the first image signal and project a first projection image on a projection plane, wherein the control unit is configured to control the light amount emitted by the light emission unit based on a brightness value of a first region of the first image signal, the first region adjoining a second projected image projected by another projection apparatus. ### Claim 2 (depends on 1) The projection apparatus according to claim 1, wherein the control unit is configured to control the light emission unit using a higher amount between a first light amount corresponding to the brightness value of the first region and a second light amount corresponding to a brightness value of a second region of the first image signal, the second region being wider than the first region. ### Claim 3 (depends on 1) The projection apparatus according to claim 1, further comprising a setting unit configured to set a control mode of the light emission unit, wherein the control unit is configured to, if the control mode of the light emission unit is set to a first control mode by the setting unit, control the light emission unit with the light amount based on the brightness of the first region of the first image, and if the control mode of the light emission unit is set to a second control mode by the setting unit, control the light emission unit with a light amount based on the brightness of a second region of the first image, the second region being wider than the first region. ### Claim 4 (depends on 3) The projection apparatus according to claim 3, wherein the second region is an entire region of the first image. ### Claim 5 (depends on 1) The projection apparatus according to claim 1, further comprising a region setting unit configured to set the first region based on a designation from a user. ### Claim 6 (depends on 1) The projection apparatus according to claim 1, wherein the control unit is configured to control the light emission unit such that the greater an average value of pixel values included in the first region of the first image is, the higher the light amount is. ### Claim 7 (depends on 1) The projection apparatus according to claim 1, wherein the first region is a region including at least any one of a top end portion, a bottom end portion, a left end portion, and a right end portion of the first image. ### Claim 8 A method for controlling a projection apparatus among a plurality of projection apparatuses configured to project a plurality of projection images side by side as a single image, the projection apparatus including a light emission unit and a modulation unit, the method comprising: controlling the light emission unit to emit a light amount based on brightness of a first image; and controlling the modulation unit to modulate light emitted from the light emission unit based on the first image and project an image onto a projection plane, wherein the light amount of the light emission unit is controlled in the light emission control based on the brightness of a first region of the first image, the first region adjoining a second image projected by another projection apparatus. ### Claim 9 (depends on 8) The method for controlling a projection apparatus according to claim 8, wherein the light emission unit is controlled in the light emission control to emit a higher amount between a first light amount corresponding to the brightness of the first region, and a second light amount corresponding to the brightness of a second region of the first image, the second region being wider than the first region. ### Claim 10 (depends on 8) The method for controlling a projection apparatus according to claim 8, further comprising setting a control mode of the light emission unit, wherein if the control mode of the light emission unit is set to a first control mode, the light emission unit is controlled in the light emission control to emit the light amount based on the brightness of the first region of the first image, and wherein if the control mode of the light emission unit is set to a second control mode, the light emission unit is controlled to emit a light amount based on the brightness of a second region of the first image, the second region being wider than the first region. ### Claim 11 (depends on 10) The method for controlling a projection apparatus according to claim 10, wherein the second region is an entire region of the first image. ### Claim 12 (depends on 8) The method for controlling a projection apparatus according to claim 8, further comprising setting the first region based on a designation from a user. ### Claim 13 (depends on 8) The method for controlling a projection apparatus according to claim 8, wherein the light emission unit is controlled in the light emission control such that the greater an average value of pixels values included in the first region of the first image is, the higher the light amount is. ### Claim 14 (depends on 8) The method for controlling a projection apparatus according to claim 8, wherein the first region is a region including at least any one of a top end portion, a bottom end portion, a left end portion, and a right end portion of the first image. ### Claim 15 A non-transitory storage medium storing a program for a processor to perform a method for controlling a projection apparatus among a plurality of projection apparatuses configured to project a plurality of projection images side by side as a single image, the projection apparatus including a light emission unit and a modulation unit, the method comprising: controlling the light emission unit to emit a light amount based on brightness of a first image; and controlling the modulation unit to module light emitted from the light emission unit based on the first image and project an image on a projection plane, wherein the light amount of the light emission unit is controlled in the light emission control based on the brightness of a first region of the first image, the first region adjoining a second image projected by another projection apparatus.