# US 2010/0165233 A1 · Backlight unit and liquid crystal display 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 2010/0165233 A1 - Document ID: US20100165233A1 - Status: Published application - Kind: A1 - Application number: 12/603,789 - Filed: 2009-10-22 - Published: 2010-07-01 - Earliest claimed: 2008-12-29 - Assignees: Samsung Electronics Co., Ltd. - Inventors: Sung Soo JUNG - Web page: https://patentgrep.com/patent/US20100165233A1 ## CPC - G02B 6/0088: {of the light guide or other optical sheets in the package} - G02B 6/009: {of the light source in the package (G02B6/0021 takes precedence)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A backlight unit and an LCD having the same. The backlight unit can include a light guide plate, a printed circuit board, a bottom cover and a fixing member. The printed circuit board can have at least one light emitting diode to emit light toward an incident surface formed at one side of the light guide plate. The bottom cover can receive the light guide plate and the printed circuit board therein. The fixing member can be formed with a recess section, into which the printed circuit board can be press-fitted, such that the printed circuit board is fixed to the fixing member. The assembling efficiency and reliability of the backlight unit can be improved. ## Claims ### Claim 1 A backlight unit comprising: a light guide plate; a printed circuit board having at least one light emitting diode to emit light toward an incident surface formed at one side of the light guide plate; a bottom cover to receive the light guide plate and the printed circuit board therein; and a fixing member formed with a recess section, into which the printed circuit board is press-fitted, to fix the printed circuit board to the fixing member. ### Claim 2 (depends on 1) The backlight unit of claim 1, wherein the fixing member comprises heat conductive metal. ### Claim 3 (depends on 2) The backlight unit of claim 2, wherein the fixing member comprises an aluminum extrusion member. ### Claim 4 (depends on 1) The backlight unit of claim 1, wherein the fixing member is integrally formed with the bottom cover. ### Claim 5 (depends on 1) The backlight unit of claim 1, wherein the recess section is formed in one sidewall of the bottom cover. ### Claim 6 (depends on 1) The backlight unit of claim 1, wherein the fixing member comprises: a support surface extending upward from a bottom surface of the bottom cover; and a pressing surface bent inward from an edge of the support surface. ### Claim 7 (depends on 6) The backlight unit of claim 6, wherein the support surface is formed at upper and lower ends thereof with concave sections. ### Claim 8 (depends on 6) The backlight unit of claim 6, wherein the fixing member further comprises: a fixed protrusion to allow the printed circuit board to contact the support surface. ### Claim 9 (depends on 8) The backlight unit of claim 8, wherein the fixed protrusion protrudes from the bottom surface of the bottom cover. ### Claim 10 (depends on 9) The backlight unit of claim 9, wherein the fixed protrusion has a semicircular section. ### Claim 11 A liquid crystal display comprising: a liquid crystal display panel; and an edge-type backlight unit to supply light to the liquid crystal display panel, wherein the backlight unit comprises: a light guide plate; a light source unit to irradiate the light onto the light guide plate; a bottom cover to receive the light guide plate and the light source unit therein; and a fixing member formed with a recess section, into which the light source unit is press-fitted, to fix the light source unit to one side of an inner portion of the bottom cover. ### Claim 12 (depends on 11) The liquid crystal display of claim 11, wherein the light source unit comprises: at least one light emitting diode; and a metal printed circuit board on which the light emitting diode is mounted. ### Claim 13 (depends on 12) The liquid crystal display of claim 12, wherein the fixing member comprises: a support surface to contact a rear surface of the metal printed circuit board; and a pressing surface to press a top surface of the metal printed circuit board. ### Claim 14 (depends on 13) The liquid crystal display of claim 13, wherein the fixing member comprises heat conductive metal. ### Claim 15 (depends on 13) The liquid crystal display of claim 13, wherein the fixing member comprises an aluminum extrusion member. ### Claim 16 (depends on 15) The liquid crystal display of claim 15, wherein the fixing member is integrally formed with the bottom cover. ### Claim 17 (depends on 13) The liquid crystal display of claim 13, wherein the fixing member further comprises a fixed protrusion to prevent the metal printed circuit board from being separated from the recess section by allowing the metal printed circuit board to closely make contact with the support surface. ### Claim 18 (depends on 17) The liquid crystal display of claim 17, wherein the fixed protrusion protrudes from the bottom surface of the bottom cover and has a semicircular section. ### Claim 19 A backlight unit of an LCD panel, comprising: a light source; a light guide plate having an edge surface to receive light from the light source; and a cover member to receive the light guide plate and the light source therein, and having a recessed portion to press-fit the light source therein and to dissipate heat of the light source. ### Claim 20 (depends on 19) The backlight unit of claim 19, wherein the cover member includes a bottom surface to support the light guide plate, and wherein the recessed portion includes a top surface to press the light source against the bottom surface. ### Claim 21 (depends on 20) The backlight unit of claim 20, wherein the bottom surface includes a protruding portion to retain the light source against a side surface of the recessed portion. ### Claim 22 (depends on 20) The backlight unit of claim 20, wherein the recessed portion includes a side surface adjoining the top and bottom surfaces to contact a back surface of the light source to dissipate heat from the light source. ### Claim 23 (depends on 22) The backlight unit of claim 22, wherein the recessed portion includes concave portions disposed at adjoining portions of the top and side surface and the bottom and side surface, respectively, to alleviate deformation when the light source is press-fitted to the recessed portion.