# US 2019/0168525 A1 · Illumination device, line sensor assembly, reading apparatus, and printing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168525 A1 - Document ID: US20190168525A1 - Status: Published application - Kind: A1 - Application number: 16/205,733 - Filed: 2018-11-30 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: Canon Components, Inc. - Applicants: Canon Components, Inc. - Inventors: Hidemasa YOSHIDA; Takeshi SUGIYAMA - Web page: https://patentgrep.com/patent/US20190168525A1 ## CPC - B41J 29/393: Devices for controlling or analysing the entire machine {; Controlling or analysing mechanical parameters involving printing of test patterns} - G01J 1/0411: {using focussing or collimating elements, i.e. lenses or mirrors; Aberration correction} - G01J 1/0425: {using optical fibers} - G01J 1/42: using electric radiation detectors (optical or mechanical part G01J1/04; by comparison with a reference light or electric value G01J1/10) - G02B 6/001: {the light being emitted along at least a portion of the lateral surface of the fibre} - G03G 15/221: {Machines other than electrographic copiers, e.g. electrophotographic cameras, electrostatic typewriters} - H04N 1/00: Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof - H04N 1/00559: {Mounting or support of components or elements (H04N1/00538 takes precedence)} - H04N 1/02835: {in combination with a light guide, e.g. optical fibre, glass plate (light-guides per se G02B6/00)} - H04N 1/02885: {Means for compensating spatially uneven illumination, e.g. an aperture arrangement} - G03G 15/607: {for detecting size, presence or position of original} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract There is provided with an illumination device. The illumination device has a circuit board; a light source movable relative to the circuit board; a rod-like light guide that is configured to guide light from the light source and that is elongated in a longitudinal direction; and a flexible wiring configured to supply electricity from the circuit board to the light source. The light source is capable of moving in the longitudinal direction to reduce fluctuation in distance between the light source and a light receiving surface of the light guide when an end portion of the light guide in the longitudinal direction moves in the longitudinal direction. ## Claims ### Claim 1 An illumination device comprising: a circuit board; a light source movable relative to the circuit board; a rod-like light guide that guides light from the light source and that is elongated in a longitudinal direction; and a flexible wiring that supplies electricity from the circuit board to the light source, wherein the light source is capable of moving in the longitudinal direction to reduce fluctuation in distance between the light source and a light receiving surface of the light guide when an end portion of the light guide in the longitudinal direction moves in the longitudinal direction. ### Claim 2 (depends on 1) The illumination device according to claim 1, wherein the light source is arranged on a light source substrate. ### Claim 3 (depends on 2) The illumination device according to claim 2, wherein a surface of the light source substrate is fixed to an end face of the light guide in the longitudinal direction. ### Claim 4 (depends on 3) The illumination device according to claim 3, wherein the light guide has a recessed portion in the end face in the longitudinal direction, and the light source is fixed inside the recessed portion. ### Claim 5 (depends on 2) The illumination device according to claim 2, further comprising a support member fixed to an end portion of the light guide in the longitudinal direction, wherein the support member is fixed to the light source substrate. ### Claim 6 (depends on 5) The illumination device according to claim 5, further comprising a light guide cover that covers a side surface of the light guide, wherein an end portion of the light guide cover and an end portion of the support member overlap each other in the longitudinal direction. ### Claim 7 (depends on 2) The illumination device according to claim 2, wherein the light source substrate is a flexible circuit board that is connected to the circuit board and that serves as the flexible wiring. ### Claim 8 (depends on 1) The illumination device according to claim 1, further comprising a frame that holds the light guide and the circuit board, wherein the light guide has a light receiving surface through which light from the light source enters, the light receiving surface being located in a first end portion of the light guide in the longitudinal direction, and the light guide is fixed to the frame at a central portion of the light guide in the longitudinal direction or at a second end portion of the light guide in the longitudinal direction to allow movement of the light source relative to the frame, the second end portion being located opposite to the first end portion. ### Claim 9 (depends on 1) The illumination device according to claim 1, further comprising an additional light source, wherein the light guide has a first light receiving surface through which light from the light source enters and a second light receiving surface through which light from the additional light source enters, the first light receiving surface being located in a first end portion of the light guide in the longitudinal direction, and the second light receiving surface being located in a second end portion of the light guide in the longitudinal direction, the light source is capable of moving in the longitudinal direction to reduce fluctuation in distance between the light source and the first light receiving surface when an end portion of the light guide in the longitudinal direction moves in the longitudinal direction, and the additional light source is capable of moving in the longitudinal direction to reduce fluctuation in distance between the additional light source and the second light receiving surface when an end portion of the light guide in the longitudinal direction moves in the longitudinal direction. ### Claim 10 (depends on 1) A line sensor assembly comprising: the illumination device according to claim 1; a lens array configured to collect light emitted from the illumination device toward a reading target; and a line sensor configured to detect light collected by the lens array. ### Claim 11 (depends on 10) A reading apparatus comprising: the line sensor assembly according to claim 10; and outputting unit configured to output read data obtained by the line sensor assembly. ### Claim 12 (depends on 11) A printing apparatus comprising: the reading apparatus according to claim 11 configured to read a first medium; a printing unit configured to perform printing on a second medium based on a result of reading by the reading apparatus; and a conveying unit configured to convey the second medium.