# US 8,540,411 B2 · Backlight unit and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,411 B2 - Document ID: US8540411B2 - Status: Granted - Kind: B2 - Application number: 12/985,723 - Filed: 2011-01-06 - Published: 2011-08-25 - Granted: 2013-09-24 - Earliest claimed: 2010-01-07 - Assignees: LG Innotek Co., Ltd. - Applicants: Sang Hoon Lee; Young Bae Jang - Inventors: Sang Hoon Lee; Young Bae Jang - Web page: https://patentgrep.com/patent/US8540411B2 ## CPC - G02B 6/0081: {Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging} - G02B 6/0051: {Diffusing sheet or layer} - G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources} - G02B 6/0073: {Light emitting diode [LED]} - 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 Disclosed are a backlight unit and a display device. The backlight unit includes a bottom cover, a light emitting module including a plurality of light sources in the bottom cover, a light guide plate at one side of the light emitting module in the bottom cover, an optical sheet on the light guide plate, a support member coupled with the bottom cover, in which a part of the support member is placed on the optical sheet to make contact with a top surface of the optical sheet so that a bottom surface of the optical sheet contacts to the light guide plate, a top cover provided on the support member and coupled with the bottom cover. The light sources are interposed between the support member and the bottom cover. ## Claims ### Claim 1 A backlight unit, comprising: a bottom cover; a light emitting module including a plurality of light sources in the bottom cover; a light guide plate at one side of the light emitting module in the bottom cover; an optical sheet on the light guide plate; a support member coupled with the bottom cover, in which a part of the support member is placed on the optical sheet to make contact with a top surface of the optical sheet so that a bottom surface of the optical sheet contacts to the light guide plate; and a top cover provided on the support member and coupled with the bottom cover, wherein the light sources are interposed between the support member and the bottom cover, and wherein the top cover includes a first longer side screwed with the bottom cover, a second longer side opposite to the first longer side, and first and second shorter sides hooked with the bottom cover between the first and second longer sides. ### Claim 2 (depends on 1) The backlight unit of claim 1, wherein the light emitting module is provided at the first longer side. ### Claim 3 (depends on 1) The backlight unit of claim 1, wherein the top cover is hooked with a lateral surface of the bottom cover, and screwed with at least one of front and lateral surfaces of the bottom cover. ### Claim 4 (depends on 1) The backlight unit of claim 1, wherein the bottom cover is provided on a second longer side and first and second shorter sides thereof with a coupling protrusion, and the top cover is provided in the second longer side and the first and second shorter sides thereof with a coupling hole into which the coupling protrusion is inserted. ### Claim 5 (depends on 1) The backlight unit of claim 1, wherein the bottom cover is formed in a first longer side thereof with a coupling hole, and the top cover is formed in the first longer side thereof with a coupling hole corresponding to the coupling hole of the bottom cover. ### Claim 6 (depends on 1) The backlight unit of claim 1, further comprising a reflective sheet between the bottom cover and the light guide plate. ### Claim 7 A backlight unit, comprising: a bottom cover; a light emitting module including a plurality of light sources in the bottom cover; a light guide plate at one side of the light emitting module in the bottom cover; an optical sheet on the light guide plate; a support member hooked or screwed with the bottom cover, in which a part of the support member is placed on the optical sheet to make contact with a top surface of the optical sheet so that a bottom surface of the optical sheet contacts to the light guide plate; and a top cover provided on the support member and coupled with the bottom cover, wherein the light sources are interposed between the support member and the bottom cover, and wherein the support member includes a first support member coupled with a first longer side of the bottom cover, a second support member coupled with a first shorter side of the bottom cover, a third support member coupled with a second shorter side of the bottom cover, and a fourth support member coupled with a second longer side of the bottom cover. ### Claim 8 (depends on 7) The backlight unit of claim 7, wherein the top cover is hooked and screwed with the bottom cover. ### Claim 9 (depends on 8) The backlight unit of claim 8, wherein the top cover includes a first longer side screwed with the bottom cover, a second longer side opposite to the first longer side, and first and second shorter sides hooked with the bottom cover between the first and second longer sides. ### Claim 10 (depends on 7) The backlight unit of claim 7, wherein the first support member includes synthetic resin, and the second, third and fourth support members include metallic materials. ### Claim 11 (depends on 7) The backlight unit of claim 7, wherein the fourth support member is divided into two parts. ### Claim 12 (depends on 7) The backlight unit of claim 7, further comprising a reflective sheet between the bottom cover and the light guide plate. ### Claim 13 A backlight unit comprising: a bottom cover; a light emitting module including a plurality of light sources in the bottom cover; a light guide plate at one side of the light emitting module in the bottom cover; an optical sheet on the light guide plate; a support member press-fitted and screwed with the bottom cover, in which a part of the support member is placed on the optical sheet to make contact with a top surface of the optical sheet so that a bottom surface of the optical sheet contacts to the light guide plate; and a top cover provided on the support member and coupled with the bottom cover, wherein the light sources are interposed between the support member and the bottom cover, wherein at least a part of the support member is provided inside the bottom cover, and at least a part of the support member is provided outside the bottom cover so that the support member is press-fitted with a sidewall of the bottom cover. ### Claim 14 (depends on 13) The backlight unit of claim 13, wherein the top cover is hooked and screwed with the bottom cover. ### Claim 15 (depends on 14) The backlight unit of claim 14, wherein the top cover includes a first longer side screwed with the bottom cover, a second longer side opposite to the first longer side, and first and second shorter sides hooked with the bottom cover between the first and second longer sides. ### Claim 16 (depends on 13) The backlight unit of claim 13, wherein the support member includes a first support member coupled with a first longer side of the bottom cover, a second support member coupled with a first shorter side of the bottom cover, a third support member coupled with a second shorter side of the bottom cover, and a fourth support member coupled with a second longer side of the bottom cover. ### Claim 17 (depends on 16) The backlight unit of claim 16, wherein the first support member includes synthetic resin, and the second, third and fourth support members include metallic materials.