# US 7,609,337 B2 · Backlight device comprising a reflector comprising a protruding part provided in a portion where a holding member is attached and liquid crystal display device having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,337 B2 - Document ID: US7609337B2 - Status: Granted - Kind: B2 - Application number: 11/420,106 - Filed: 2006-05-24 - Published: 2006-11-30 - Granted: 2009-10-27 - Earliest claimed: 2005-05-30 - Assignees: Sharp Kabushiki Kaisha - Inventors: Hisanori Bessho - Web page: https://patentgrep.com/patent/US7609337B2 ## CPC - G02B 6/0091: {of the light source relative to the light guide (G02B6/0021 takes precedence)} - G02B 6/0031: {Reflecting element, sheet or layer} - G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources} - G02B 6/0071: {with elongated shape, e.g. tube} - G02B 6/009: {of the light source in the package (G02B6/0021 takes precedence)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A backlight device is incorporated into a liquid crystal display device so as to illuminate a liquid crystal panel from a backside. The backlight device includes a light-guiding plate emitting a light, which is incident on a side surface thereof, from a front surface, and a reflector arranged along the side surface of the light-guiding plate so as to reflect a light from a light source accommodated inside thereof and guide the light to the side surface of the light-guiding plate through an opening part. A least one minute protruding part, which protrudes in a direction parallel to the side surface of said light-guiding plate, is formed on an edge part of the opening part of the reflector facing the light-guiding plate. The side surface of the light-guiding plate is brought into contact with the protruding part of the reflector when the light-guiding plate moves toward the reflector. ## Claims ### Claim 1 A backlight device configured to be incorporated into a liquid crystal display device, comprising: a light-guiding plate emitting a light, which is incident on a side surface thereof, from a front surface; and a reflector arranged along the side surface of the light-guiding plate so as to reflect a light from a light source accommodated inside thereof and guide the light to said side surface of said light-guiding plate through an opening part; wherein at least one protruding part protrudes in a direction parallel to the side surface of said light-guiding plate from only a limited portion along an edge part of the opening part of said reflector facing said light-guiding plate; said side surface of said light-guiding plate is brought into contact with said protruding part of said reflector when said light-guiding plate moves toward said; and said reflector has a holding member formed of an elastic material and arranged to fix said light source, and said protruding member is provided in a portion where the holding member is attached and said protruding member is in contact with and embedded into said holding member. ### Claim 2 (depends on 1) The backlight device as claimed in claim 1, wherein said reflector is formed of a metal plate, and said protruding part is formed by deforming the metal plate. ### Claim 3 (depends on 1) The backlight device as claimed in claim 1, wherein a coat is applied on a surface of said protruding part facing said light-guiding plate, the coat having a coefficient of friction smaller than that of said reflector. ### Claim 4 (depends on 1) The backlight device as claimed in claim 1, wherein a coat is applied on a surface of said protruding part facing said light-guiding plate, the coat having a coefficient of friction smaller than that of said reflector. ### Claim 5 (depends on 1) The backlight device as claimed in claim 1, wherein a coat is applied on a surface of said protruding part facing said light-guiding plate, the coat having a coefficient of friction smaller than that of said reflector. ### Claim 6 A liquid display device comprising: a backlight device; and a liquid crystal panel arranged on the backlight device, wherein said backlight device includes: a light-guiding plate emitting a light, which is incident on a side surface thereof, from a front surface; and a reflector arranged along the side surface of the light-guiding plate so as to reflect a light from a light source accommodated inside thereof and guide the light to said side surface of said light-guiding plate through an opening part; wherein wherein at least one protruding part protrudes in a direction parallel to the side surface of said light-guiding plate from only a limited portion along an edge part of the opening part of said reflector facing said light-guiding plate; said side surface of said light-guiding plate is brought into contact with said protruding part of said reflector when said light-guiding plate moves toward said; and said reflector has a holding member formed of an elastic material and arranged to fix said light source, and said protruding member is provided in a portion where the holding member is attached and said protruding member is in contact with and embedded into said holding member. ### Claim 7 (depends on 6) The liquid crystal display device as claimed in claim 6, wherein said reflector is formed of a metal plate, and said protruding part is formed by deforming the metal plate. ### Claim 8 (depends on 6) The liquid crystal display device as claimed in claim 6, wherein a coat is applied on a surface of said protruding part facing said light-guiding plate, the coat having a coefficient of friction smaller than that of said reflector. ### Claim 9 (depends on 6) The liquid crystal display device as claimed in claim 6, wherein a coat is applied on a surface of said protruding part facing said light-guiding plate, the coat having a coefficient of friction smaller than that of said reflector. ### Claim 10 (depends on 6) The liquid crystal display device as claimed in claim 6, wherein a coat is applied on a surface of said protruding part facing said light-guiding plate, the coat having a coefficient of friction smaller than that of said reflector.