# US 10,769,505 B2 · Optical sensor device performing color correction using light adjustment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,769,505 B2 - Document ID: US10769505B2 - Status: Granted - Kind: B2 - Application number: 16/356,624 - Filed: 2019-03-18 - Published: 2019-09-26 - Granted: 2020-09-08 - Earliest claimed: 2018-03-20 - Assignees: Ricoh Company, Ltd. - Applicants: Satoshi Iwanami; Nobuyuki Satoh; Hirohito Murate - Inventors: Satoshi Iwanami; Nobuyuki Satoh; Hirohito Murate - Web page: https://patentgrep.com/patent/US10769505B2 ## CPC - G01J 3/524: {Calibration of colorimeters} - G06K 15/1878: {Adjusting colours (image colour correction or control for documents in general H04N1/60)} - G01J 1/44: Electric circuits {(for command of an exposure part G03B7/02)} - G01J 3/021: {using plane or convex mirrors, parallel phase plates, or particular reflectors} - G01J 3/0297: {Constructional arrangements for removing other types of optical noise or for performing calibration} - G01J 3/10: Arrangements of light sources specially adapted for spectrometry or colorimetry - G01J 3/462: {Computing operations in or between colour spaces; Colour management systems} - G01J 3/50: using electric radiation detectors - G01J 3/501: {Colorimeters using spectrally-selective light sources, e.g. LEDs} - G06K 15/027: {Test patterns and calibration (arrangements for controlling or analysing printing mechanisms of typewriters or selective printing units B41J29/393 takes precedence; colour correction using test pattern analysis in general H04N1/6033)} - G06K 15/102: {using ink jet print heads} - G06T 7/90: Determination of colour characteristics - H04N 1/4076: {dependent on references outside the picture} - H04N 1/6027: {Correction or control of colour gradation or colour contrast (H04N1/6058 takes precedence)} - G01J 3/52: using colour charts - G01J 2003/104: {Monochromatic plural sources} - G06T 2207/10024: Color image - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract An optical sensor device includes a first light source, a second light source, a sensor, and control circuitry. The first light source has a plurality of peak wavelengths in a wavelength range of 400 nm to 780 nm. The second light source emits ultraviolet light. The control circuitry adjusts a light amount of the first light source based on an output of the sensor in a state the first light source is on and the second light source is off, adjusts a light amount of the second light source based on an output of the sensor in a state the second light source is on and the first light source is off, and acquires a correction value of data output by the sensor, based on an output of the sensor in a state each of the first and second light sources is on with the light amount adjusted. ## Claims ### Claim 1 An optical sensor device comprising: a first light source having a plurality of peak wavelengths in a wavelength range of from 400 nm to 780 nm; a second light source to emit ultraviolet light; a sensor to receive light emitted by the first light source or the second light source and reflected by an object; and control circuitry to: adjust a light amount of the first light source based on an output of the sensor in a state where the first light source is turned on and the second light source is turned off; adjust a light amount of the second light source based on an output of the sensor in a state where the second light source is turned on and the first light source is turned off; and acquire a correction value of data output by the sensor, based on an output of the sensor in a state where each of the first light source and the second light source is turned on with the light amount adjusted by the control circuitry. ### Claim 2 (depends on 1) The optical sensor device according to claim 1, wherein the control circuitry adjusts the light amount of the first light source using a value of any one of R, G, and B output from the sensor. ### Claim 3 (depends on 1) The optical sensor device according to claim 1, wherein the control circuitry adjusts the light amount of the second light source using a value of any one of R, G, and B output from the sensor. ### Claim 4 (depends on 1) The optical sensor device according to claim 1, wherein the control circuitry adjusts white balance and y correction based on the correction value of the data. ### Claim 5 (depends on 1) A colorimetric device comprising: the optical sensor device according to claim 1; and a reference chart to be captured together with the object by the optical sensor device, wherein the control circuitry calculates a colorimetric value of the object based on image capturing data of the object and the reference chart that are captured by the optical sensor device. ### Claim 6 (depends on 5) The colorimetric device according to claim 5, wherein the control circuitry includes a memory to store, in advance in a memory table, RGB values for different object types obtained by the sensor from objects captured using the second light source, wherein the control circuitry determines a type of the object based on a result of comparison between an RGB value obtained by the sensor from the object captured using the second light source and the RGB values stored in the memory table. ### Claim 7 (depends on 6) The colorimetric device according to claim 6, wherein the control circuitry calculates a reference value linear conversion matrix for a pair of the RGB value of the object determined and a reference colorimetric value. ### Claim 8 (depends on 5) An image forming apparatus comprising: an image output device to output an image onto a recording medium; and the colorimetric device according to claim 5, wherein the colorimetric device defines an image output by the image output device as the object and calculates a colorimetric value of the image, and wherein, after the colorimetric device calculates the colorimetric value, the image output device outputs an image based on image data in which color adjustment is performed using the colorimetric value.