# US 8,787,799 B2 · Illuminating device, image reading apparatus and image forming apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,799 B2 - Document ID: US8787799B2 - Status: Granted - Kind: B2 - Application number: 13/062,745 - Filed: 2009-10-09 - Published: 2011-07-07 - Granted: 2014-07-22 - Earliest claimed: 2008-10-30 - Assignees: Sharp Kabushiki Kaisha - Applicants: Yoshihisa Yamada; Mitsuharu Yoshimoto; Yasuhiro Suto; Kenji Nakanishi; Shohichi Fukutome; Hisashi Yamanaka - Inventors: Yoshihisa Yamada; Mitsuharu Yoshimoto; Yasuhiro Suto; Kenji Nakanishi; Shohichi Fukutome; Hisashi Yamanaka - Web page: https://patentgrep.com/patent/US8787799B2 ## CPC - H04N 1/02825: {in combination with at least one reflector which is fixed in relation to the light source (H04N1/02835 and H04N1/0284 take precedence)} - F21V 29/505: of reflectors - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - F21V 29/89: Metals - G02B 6/0001: {specially adapted for lighting devices or systems (lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00)} - G02B 6/0055: {Reflecting element, sheet or layer} - G02B 6/0085: {Means for removing heat created by the light source from the package} - G03B 27/54: Lamp housings; Illuminating means - G03G 15/04036: {Details of illuminating systems, e.g. lamps, reflectors (lamp housings for copying cameras, reflex exposure lighting G03B27/542)} - G03G 15/326: {by application of light, e.g. using a LED array} - H04N 1/02815: {Means for illuminating the original, not specific to a particular type of pick-up head} - 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 15/0435: {by introducing an optical element in the optical path, e.g. a filter} - H04N 2201/0094: Multifunctional device, i.e. a device capable of all of reading, reproducing, copying, facsimile transception, file transception - H04N 2201/02462: Illuminating means - H04N 2201/02474: Clasping; Clamping (H04N2201/02472 takes precedence) - H04N 2201/02485: Dedicated element, e.g. bracket or arm - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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) - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract An illuminating device (210) according to an embodiment of the invention included in an image reading apparatus (100) and an image forming apparatus (D) includes light source portions (211a1), (211b1), (211a2) and (211b2), light-guiding members (213a) and (213b) for illuminating an illumination target (G) from an elongated light emitting face (M) that extends in a longitudinal direction (Y), by guiding light from the light source portions, and holding members (216a) and (216b) for holding the light-guiding members. The holding members include holding portions (2161a) and (2161b) for removably holding the light-guiding members, and tilted portions (2162a) and (2162b) that reflect light emitted from the light emitting face (M), the tilted portions extending from a front end on the light emitting face (M) side of the holding portions, obliquely widening with increasing distance from the light-guiding members. ## Claims ### Claim 1 An illuminating device comprising: a light source portion; a translucent elongated light-guiding member for illuminating an illumination target from an elongated light emitting face that extends in a longitudinal direction, by guiding incident light from the light source portion; and a holding member for holding the light-guiding member, wherein the light source portion is provided in such a manner as to guide the light from an end face in the longitudinal direction of the light-guiding member, the light-guiding member is formed in a square or a rectangular shape when viewed from a side in the longitudinal direction, and the holding member comprises: a holding portion formed in a quadrangle shape with one open side when viewed from the side in the longitudinal direction, the holding portion removably holding the light-guiding member fitted to an inner face of the holding portion such that the light emitting face of the light-guiding member is disposed at a face on the open side; and a tilted portion that reflects light from the light source portion that passes through the light-guiding member and that is emitted from the light emitting face, the tilted portion extending from a front end on the light emitting face side of the holding portion, obliquely widening with increasing distance from the light-guiding member. ### Claim 2 (depends on 1) The illuminating device according to claim 1, wherein a holding face of the holding portion for holding the light-guiding member serves as a reflecting face for reflecting light inside the light-guiding member. ### Claim 3 (depends on 1) The illuminating device according to claim 1, wherein a reflecting member is provided at the holding face of the holding portion for holding the light-guiding member and at an inner face of the tilted portion. ### Claim 4 (depends on 1) The illuminating device according to claim 1, wherein the holding portion holds the light-guiding member in a state of close contact. ### Claim 5 (depends on 1) The illuminating device according to claim 1, wherein the light source portion is provided on both sides in the longitudinal direction of the light-guiding member, and the light-guiding member irradiates the illumination target with light from the light emitting face by guiding light from the light source portion on one side from one end face in the longitudinal direction, and guiding light from the other light source portion on the other side from the other end face in the longitudinal direction. ### Claim 6 (depends on 5) The illuminating device according to claim 5, a length in a width direction at the open end of the holding portion having the quadrangular shape with one open side when viewed from the side in the longitudinal direction is shorter than a length in the width direction at a base end of the holding portion. ### Claim 7 (depends on 5) The illuminating device according to claim 5, wherein a length in a width direction at the open end of the holding portion having the quadrangular shape with one open side when viewed from the side in the longitudinal direction is shorter than a length in a width direction of the light-guiding member. ### Claim 8 (depends on 1) The illuminating device according to claim 1, wherein the holding portion is formed of a metal material having elasticity. ### Claim 9 (depends on 1) An image reading apparatus comprising the illuminating device according to claim 1. ### Claim 10 (depends on 9) An image forming apparatus comprising the image reading apparatus according to claim 9. ### Claim 11 An image reading apparatus, including an illuminating device comprising: a light source portion; a translucent elongated light-guiding member for illuminating an illumination target from an elongated light emitting face that extends in a longitudinal direction, by guiding light from the light source portion; and a holding member for holding the light-guiding member, wherein the holding member comprises: a holding portion for removably holding the light-guiding member; and a tilted portion that reflects light from the light source portion that passes through the light-guiding member and that is emitted from the light emitting face, the tilted portion extending from a front end on the light emitting face side of the holding portion, obliquely widening with increasing distance from the light-guiding member. ### Claim 12 (depends on 11) The image reading apparatus according to claim 11, wherein a holding face of the holding portion for holding the light-guiding member serves as a reflecting face for reflecting light inside the light-guiding member. ### Claim 13 (depends on 11) The image reading apparatus according to claim 11, wherein a reflecting member is provided at the holding face of the holding portion for holding the light-guiding member and at an inner face of the tilted portion. ### Claim 14 (depends on 11) The image reading apparatus according to claim 11, wherein the holding portion holds the light-guiding member in a state of close contact. ### Claim 15 (depends on 11) The image reading apparatus according to claim 11, wherein the light source portion is provided on both sides in the longitudinal direction of the light-guiding member, and the light-guiding member irradiates the illumination target with light from the light emitting face by guiding light from the light source portion on one side from one end face in the longitudinal direction, and guiding light from the other light source portion on the other side from the other end face in the longitudinal direction. ### Claim 16 (depends on 15) The image reading apparatus according to claim 15, wherein the holding portion is formed in a quadrangular shape with one open side when viewed from the side in the longitudinal direction, and removably holds the light-guiding member fitted to an inner face of the holding portion, and a length in a width direction at the open end of the holding portion having the quadrangular shape with one open side when viewed from the side in the longitudinal direction is shorter than a length in the width direction at a base end of the holding portion. ### Claim 17 (depends on 15) The image reading apparatus according to claim 15, wherein the holding portion is formed in a quadrangular shape with one open side when viewed from the side in the longitudinal direction, and removably holds the light-guiding member fitted to the inner face of the holding portion, the light-guiding member is formed in a square or a rectangular shape when viewed from the side in the longitudinal direction, and the length in the width direction at the open end of the holding portion having the quadrangular shape with one open side when viewed from the side in the longitudinal direction is shorter than a length in a width direction of the light-guiding member. ### Claim 18 (depends on 11) The image reading apparatus according to claim 11 wherein the holding portion is formed of a metal material having elasticity. ### Claim 19 (depends on 11) An image forming apparatus comprising the image reading apparatus according to claim 11.