# US 2010/0165232 A1 · Liquid crystal display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0165232 A1 - Document ID: US20100165232A1 - Status: Published application - Kind: A1 - Application number: 12/585,191 - Filed: 2009-09-08 - Published: 2010-07-01 - Earliest claimed: 2008-12-26 - Assignees: LG Display Co., Ltd. - Inventors: Jae Hyun PARK; Hyeuk-Chan KWON; Ju-Hun MIN - Web page: https://patentgrep.com/patent/US20100165232A1 ## CPC - G02B 6/009: {of the light source in the package (G02B6/0021 takes precedence)} - G02B 6/0051: {Diffusing sheet or layer} - G02B 6/0055: {Reflecting element, sheet or layer} - G02F 1/133308: {Support structures for LCD panels, e.g. frames or bezels} - G02F 1/133317: {Intermediate frames, e.g. between backlight housing and front frame} - G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A liquid crystal display (LCD) device includes: an LC panel; a lamp disposed below the LC panel, for supplying light to the LC panel; a lamp housing having an opening, for encompassing and protecting the lamp; first and second diffusion reflection sheets disposed on end portions of inner lower and upper surfaces of the lamp housing, respectively; and a light guide plate disposed to be adjacent to the opening of the lamp housing, for guiding light emitted from the lamp to the LC panel. ## Claims ### Claim 1 A liquid crystal display (LCD) device, comprising: an LC panel; a lamp disposed below the LC panel, for supplying light to the LC panel; a lamp housing having an opening, for encompassing and protecting the lamp; first and second diffusion reflection sheets disposed on end portions of inner lower and upper surfaces of the lamp housing, respectively; and a light guide plate disposed to be adjacent to the opening of the lamp housing, for guiding light emitted from the lamp to the LC panel. ### Claim 2 (depends on 1) The LCD device of claim 1, wherein the diffusion reflection sheet has a reflectivity more than 90%. ### Claim 3 (depends on 1) The LCD device of claim 1, wherein the diffusion reflection sheet is formed to have a half-intensity angle more than 80° based on light having an incident angle of 20°. ### Claim 4 (depends on 1) The LCD device of claim 1, wherein the LC panel is divided into a display region for displaying an image, and a non-display region disposed at the periphery of the display region, wherein the first diffusion reflection sheet is disposed to overlap an end portion of the light guide plate, and some regions of the LC panel, wherein an end portion of the first diffusion reflection sheet adjacent to the lamp overlaps with an end portion of a rear surface of the light guide plate adjacent to the lamp, and wherein an end portion of the first diffusion reflection sheet not adjacent to the lamp is disposed to be within ±5 mm, based on a line perpendicular to an upper surface of the LC panel which divides the display region and the non-display region of the LC panel from each other. ### Claim 5 (depends on 1) The LCD device of claim 1, wherein the LC panel is divided into a display region for displaying an image, and a non-display region disposed at the periphery of the display region, wherein the second diffusion reflection sheet is disposed to overlap an end portion of the light guide plate and some regions of the LC panel, wherein an end portion of the second diffusion reflection sheet adjacent to the lamp overlaps with an end portion of an upper surface of the light guide plate adjacent to the lamp, and wherein an end portion of the second diffusion reflection sheet not adjacent to the lamp is disposed to overlap with an outermost region of an inner upper surface of the lamp housing. ### Claim 6 (depends on 1) The LCD device of claim 1, wherein the diffusion reflection sheet is bonded to an inner surface of the lamp housing. ### Claim 7 (depends on 6) The LCD device of claim 6, wherein the diffusion reflection sheet is bonded to an inner surface of the lamp housing as one surface of the diffusion reflection sheet having a bonding material thereon is bonded to the inner surface of the lamp housing. ### Claim 8 (depends on 1) The LCD device of claim 1, wherein the diffusion reflection sheet is bonded to a surface of the light guide plate. ### Claim 9 (depends on 1) The LCD device of claim 1, further comprising a reflection sheet disposed under the light guide plate, wherein the diffusion reflection sheet is disposed such that a side surface thereof comes in contact with a side surface of the reflection sheet without a gap therebetween. ### Claim 10 (depends on 1) The LCD device of claim 1, wherein a first prism sheet, a second prism sheet, and a diffusion sheet are disposed on the light guide plate, sequentially. ### Claim 11 A liquid crystal display (LCD) device, comprising: an LC panel; a plurality of point light sources disposed below the LC panel, for supplying light to the LC panel; a light guide plate disposed at one side of the plurality of point light sources, for guiding light emitted from the lamp to the LC panel; and first and second diffusion reflection sheets disposed on end portions of lower and upper surfaces of the light guide plate so as to be adjacent to the point light sources, respectively. ### Claim 12 (depends on 11) The LCD device of claim 11, wherein the diffusion reflection sheet has a reflectivity more than 90%. ### Claim 13 (depends on 11) The LCD device of claim 11, wherein the diffusion reflection sheet is formed to have a half-intensity angle more than 80° based on light having an incident angle of 20°. ### Claim 14 (depends on 11) The LCD device of claim 11, wherein the LC panel is divided into a display region for displaying an image, and a non-display region disposed at the periphery of the display region, wherein the first diffusion reflection sheet is disposed to overlap an end portion of the light guide plate, and some regions of the LC panel, wherein an end portion of the first diffusion reflection sheet adjacent to the point light sources overlaps with an end portion of a rear surface of the light guide plate adjacent to the point light sources, and wherein an end portion of the first diffusion reflection sheet not adjacent to the point light sources is disposed to be within ±5 mm, based on a line perpendicular to an upper surface of the LC panel which divides the display region and the non-display region of the LC panel from each other. ### Claim 15 (depends on 11) The LCD device of claim 11, wherein the LC panel is divided into a display region for displaying an image, and a non-display region disposed at the periphery of the display region, further comprising a flexible printed circuit board (FPCB) having both end portions twice-bent so as to be adjacent to end portions of upper and lower surfaces of the light guide plate, the FPCB on which the point light sources are mounted so as to be adjacent to a side surface of the light guide plate, and wherein the second diffusion reflection sheet is disposed to overlap an end portion of the light guide plate and some regions of the LC panel, wherein an end portion of the second diffusion reflection sheet adjacent to the point light sources overlaps with an end portion of an upper surface of the light guide plate adjacent to the point light sources, and wherein an end portion of the second diffusion reflection sheet not adjacent to the point light sources is disposed to overlap with an outermost region of an inner upper surface of the FPCB. ### Claim 16 (depends on 11) The LCD device of claim 11, wherein the diffusion reflection sheet is bonded to a surface of the light guide plate. ### Claim 17 (depends on 16) The LCD device of claim 16, wherein the diffusion reflection sheet is bonded to an inner surface of the lamp housing as one surface of the diffusion reflection sheet having a bonding material thereon is bonded to the inner surface of the lamp housing. ### Claim 18 (depends on 11) The LCD device of claim 11, wherein the point light sources are arranged by a top view method. ### Claim 19 (depends on 11) The LCD device of claim 11, wherein the point light sources are arranged by a side view method. ### Claim 20 (depends on 11) The LCD device of claim 11, further comprising a reflection sheet disposed under the light guide plate, wherein the diffusion reflection sheet is disposed such that a side surface thereof comes in contact with a side surface of the reflection sheet without a gap therebetween.