# US 10,455,119 B2 · Display device, image processing apparatus, control methods thereof, and display system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,119 B2 - Document ID: US10455119B2 - Status: Granted - Kind: B2 - Application number: 16/021,359 - Filed: 2018-06-28 - Published: 2019-01-10 - Granted: 2019-10-22 - Earliest claimed: 2017-07-05 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Kenichi Morikawa; Tomokazu Mori - Web page: https://patentgrep.com/patent/US10455119B2 ## CPC - H04N 1/58: Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction (H04N1/62 takes precedence) - G03B 21/00: Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) - H04N 1/00997: {Light control, e.g. shielding from ambient light or preventing light leakage} - H04N 1/6061: {involving the consideration or construction of a gamut surface} - H04N 1/6077: {Colour balance, e.g. colour cast correction} - 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 9/3185: {Geometric adjustment, e.g. keystone or convergence (optical or mechanical adjustment of convergence H04N9/317; using scanning means H04N3/22; optical or mechanical adjustments of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/14)} - H04N 9/3194: {including sensor feedback} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract Provided is a display device that illuminates a printed material taking into consideration the characteristics of the printed material. The display device obtains an image for illuminating the printed material, and information pertaining to the optical characteristics, such as light reflectance or transmission, of the printed material. Then, on the basis of metadata pertaining to a luminance or color of the obtained image and the obtained information, the display device controls a light source illuminating the printed material. Through this, the display device enhances the dynamic range or the color gamut of the printed material. ## Claims ### Claim 1 A display device capable of enhancing a dynamic range or a color gamut of a printed material by illuminating the printed material, the device comprising: an image input interface that receives an image for illuminating the printed material; an information obtainment circuit that obtains information pertaining to optical characteristics of the printed material; and a light source controller that controls, on the basis of metadata pertaining to a luminance or a color of the image and the information, a light source that illuminates the printed material. ### Claim 2 (depends on 1) The display device according to claim 1, further comprising: a metadata obtainment circuit that obtains the metadata. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the metadata is a value pertaining to a maximum luminance or an average luminance. ### Claim 4 (depends on 2) The display device according to claim 2, wherein the metadata is a value pertaining to a color temperature of a white point; and on the basis of the value, the light source controller controls a balance between a plurality of color component lights emitted by the light source. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the light source illuminates a printing surface of the printed material; and the information is information pertaining to a light reflectance of the printed material. ### Claim 6 (depends on 5) The display device according to claim 5, wherein the printed material is illuminated by the light source projecting the image. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the light source illuminates a back surface of the printed material; and the information is information pertaining to light transmission. ### Claim 8 (depends on 7) The display device according to claim 7, wherein light source controller controls brightness of the light source based on the image in order to illuminate the back surface of the printed material by the light source. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the light source controller controls the light source so that an effect on the luminance of the illuminated printed material caused by differences in the optical characteristics of the printed material to be reduced. ### Claim 10 (depends on 1) The display device according to claim 1, further comprising: an environment obtainment circuit that obtains environment information from captured images of an area including a location where the printed material is placed that are captured when the light source is lit and when the light source is unlit, the environment information pertaining to a brightness at which the light source illuminates the location, wherein the light source controller further controls the light source on the basis of the environment information. ### Claim 11 (depends on 10) The display device according to claim 10, wherein the environment obtainment circuit obtains a change from a reference value for the brightness at which the light source illuminates the location as the environment information. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the reference value is the environment information obtained in the past. ### Claim 13 A projection-type display device that projects an image onto a projection surface using a light source, the device comprising: an image input interface that receives the image; an information obtainment circuit that obtains information pertaining to optical characteristics of the projection surface; and a light source controller that controls the light source on the basis of metadata pertaining to a luminance or a color of the image and the information. ### Claim 14 A display system comprising: a display device; and an information processing apparatus communicatively connected to the display device, wherein the display device is capable of enhancing a dynamic range or a color gamut of a printed material by illuminating the printed material, the display device comprises: an image input interface that receives from the information processing apparatus an image for illuminating the printed material; an information obtainment circuit that obtains information pertaining to optical characteristics of the printed material; and a light source controller that controls, on the basis of metadata pertaining to a luminance or a color of the image and the information, a light source that illuminates the printed material, and wherein the information processing apparatus sends, to the display device, the image based on an image printed onto the printed material. ### Claim 15 A control method of a display device capable of enhancing a dynamic range or a color gamut of a printed material by illuminating the printed material, the method comprising: receiving an image for illuminating the printed material; obtaining information pertaining to optical characteristics of the printed material; and controlling, on the basis of metadata pertaining to a luminance or a color of the image and the information, a light source that illuminates the printed material. ### Claim 16 A non-transitory computer-readable medium storing a program that causes a computer included in a display device being capable of enhancing a dynamic range or a color gamut of a printed material by illuminating the printed material to function as: an image input unit that receives an image for illuminating the printed material; an information obtainment unit that obtains information pertaining to optical characteristics of the printed material; and a light source control unit that controls, on the basis of metadata pertaining to a luminance or a color of the image and the information, a light source that illuminates the printed material. ### Claim 17 A non-transitory computer-readable medium storing a program that causes a computer included in a projection-type display device that projects an image onto a projection surface using a light source to function as: an image input unit that receives the image; an information obtainment unit that obtains information pertaining to optical characteristics of the projection surface; and a light source control unit that controls the light source on the basis of metadata pertaining to a luminance or a color of the image and the information.