Source: https://patents.google.com/patent/US20110242852A1/en
Timestamp: 2018-12-17 07:40:23
Document Index: 407869456

Matched Legal Cases: ['§119', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'art 224', 'art 225', 'art 224', 'art 225', 'art.\n20']

US20110242852A1 - Backlight unit and display apparatus - Google Patents
US20110242852A1
US20110242852A1 US13072875 US201113072875A US2011242852A1 US 20110242852 A1 US20110242852 A1 US 20110242852A1 US 13072875 US13072875 US 13072875 US 201113072875 A US201113072875 A US 201113072875A US 2011242852 A1 US2011242852 A1 US 2011242852A1
US13072875
US9453959B2 (en )
Provided is a backlight unit, which includes at least one supporter, at least one light guide panel, and at least one light emitting module. The supporter includes a recess stepped at a lower height than that of a first region of an upper surface. The light guide panel is disposed on the supporter and is coupled to the supporter. The light emitting module is disposed in the recess of the supporter and provides light through a side surface of the light guide panel.
The present application claims priority under 35 U.S.C. §119 of Korean Patent Application No. 10-2010-0028435 filed Mar. 30, 2010, Korean Patent Application No. 10-2010-0029215 filed Mar. 31, 2010, and Korean Patent Application No. 10-2010-0029816 filed Apr. 1, 2010, which are hereby incorporated by reference in its entirety.
Embodiments provide a backlight unit and a display apparatus, which have a novel structure.
In the description of embodiments, it will understood that when a layer (or film) is referred to as being ‘on’ another layer or substrate, it can be directly on another layer or substrate, or intervening layers may also be present. Further, it will be understood that when a layer is referred to as being ‘under’ another layer, it can be directly under another layer, and one or more intervening layers may also be present. In addition, it will also be understood that when a layer is referred to as being ‘between’ two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. Further, the reference about ‘on’ and ‘under’ each layer will be made on the basis of drawings.
Light emitted from the light emitting modules 250 is reflected to the front side of the light guide panels 240 by the reflective sheets 230. When the supporter 220 is formed of a material having high reflectivity, the reflective sheets 230 may be removed. The reflective sheet 230 may be replaced with a reflective coating layer formed on the light guide panel 240 and/or the supporter 220.
For example, when the light guide panel 240 is formed of a material having a coefficient of thermal expansion of about 6.0×10−6 mm/m° C., and the supporter 220 comprises a zinc-plated steel plate having a coefficient of thermal expansion of about 11.7×10−6 mm/m° C., the light guide panel 240 may be bent by the difference between the coefficients of thermal expansion. Especially, if the light guide panel 240 is coupled to the supporter 220 by a screw, the light guide panel 240 may be further bent.
The printed circuit board 251 may be disposed in the recess 221 of the supporter 220 a, and the light emitting devices 252 are disposed over the printed circuit board 251 to face the light incident portion 243 of the light guide panel 240. Alternatively, the printed circuit board 251 may be coupled to the supporter 220 through the screws 253, an adhesive material, or a double-sided adhesive tape.
According to an embodiment, the supporter 220 may further comprise stoppers 229. The supporter 220 may comprise the recess 221 and the inclination surfaces 226 on the upper surface thereof. The light emitting module 250 may be disposed in the recess 221, and the reflective sheet 230 and the light guide panel 240 may be disposed on the inclination surface 226. The recess 221 may be stepped at a lower height than that of the first region of the upper surface of the supporter 220. That is, the recess 221 may be stepped from the inclination surface 226. The protrusions 223 are disposed at the center and a side of the supporter 220, and the first coupling part 224 and the second coupling part 225 are disposed on the protrusion 223. The first coupling part 224 and the second coupling part 225 may be provided in the form of a hole or a recess.
at least one supporter comprising a recess stepped at a lower height than that of a first region of an upper surface;
at least one light guide panel disposed on the supporter and coupled to the supporter; and
at least one light emitting module disposed in the recess of the supporter and providing light through a side surface of the light guide panel.
2. The backlight unit according to claim 1, wherein the supporter and the light guide panel are formed of a resin.
3. The backlight unit according to claim 1, further comprising a frame disposed under the supporter, wherein the supporter is coupled to the frame.
4. The backlight unit according to claim 3, wherein the frame comprises a hole,
the supporter comprises a coupling protrusion on a surface thereof, and
the coupling protrusion is coupled to the hole.
5. The backlight unit according to claim 1, wherein the light guide panels are coupled to each of the supporters.
6. The backlight unit according to claim 1, further comprising a reflective sheet disposed between the supporter and the light guide panel.
7. The backlight unit according to claim 1, wherein the light guide panel comprises a protrusion on a side surface thereof,
the supporter comprises a coupling part coupling to the protrusion.
8. The backlight unit according to claim 7, wherein the coupling part comprises a recess or a hole.
9. The backlight unit according to claim 1, wherein the supporter comprises one of polycarbonate and polymethyl methacrylate (PMMA).
10. The backlight unit according to claim 1, wherein the supporter comprises a stopper protruding from the first region to the recess.
11. The backlight unit according to claim 10, wherein the light emitting module comprises:
a printed circuit board coupled to the recess of the supporter and comprising at least one portion disposed between the recess and the stopper; and
a light emitting device disposed on the printed circuit board and providing light through a side surface of the light guide panel.
12. The backlight unit according to claim 11, wherein the printed circuit board is coupled to the supporter through at least one of a screw, an adhesive material, and a double-sided adhesive tape.
13. The backlight unit according to claim 10, wherein the stopper and the supporter are formed of the same material.
a backlight unit disposed under the display panel,
15. The display apparatus according to claim 14, wherein the supporter and the light guide panel are formed of resin.
16. The display apparatus according to claim 14, further comprising a frame disposed under the supporter, wherein the supporter is coupled to the frame.
17. The display apparatus according to claim 16, wherein the frame comprises a hole,
18. The display apparatus according to claim 14, wherein the light guide panels are coupled to each of the supporters.
19. The display apparatus according to claim 14, wherein the supporter comprises a stopper protruding from the first region to the recess part.
20. The display apparatus according to claim 19, wherein the light emitting module comprises:
US13072875 2010-03-30 2011-03-28 Backlight unit and display apparatus Active 2035-01-24 US9453959B2 (en)
KR20100028435A KR101047732B1 (en) 2010-03-30 2010-03-30 Backlight unit and dispaly apparatus
KR10-2010-0028435 2010-03-30
KR20100029215A KR20110109459A (en) 2010-03-31 2010-03-31 Backlight unit and dispaly apparatus
KR10-2010-0029215 2010-03-31
KR20100029816A KR101055021B1 (en) 2010-04-01 2010-04-01 Backlight unit and dispaly apparatus
KR10-2010-0029816 2010-04-01
US20110242852A1 true true US20110242852A1 (en) 2011-10-06
US9453959B2 US9453959B2 (en) 2016-09-27
US13072875 Active 2035-01-24 US9453959B2 (en) 2010-03-30 2011-03-28 Backlight unit and display apparatus
EP (1) EP2372418A3 (en)
CN102748714B (en) 2012-06-28 2013-12-11 深圳市华星光电技术有限公司 Fluorescent powder substrate manufacturing method and liquid crystal module using fluorescent powder substrate
KR101058564B1 (en) 2005-11-21 2011-08-23 삼성전자주식회사 A backlight unit and a liquid crystal display device incorporating this
KR101565934B1 (en) 2008-05-23 2015-11-06 삼성디스플레이 주식회사 A backlight assembly and a display device having the same
EP2372418A2 (en) 2011-10-05 application
US9453959B2 (en) 2016-09-27 grant
EP2372418A3 (en) 2013-12-04 application
CN102207265A (en) 2011-10-05 application
CN102207265B (en) 2014-03-12 grant
WO2010082377A1 (en) 2010-07-22 Illuminating device, display device and television receiver
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, BANG GUN;KIM, MOON JEONG;PARK, SUNG YOUNG;REEL/FRAME:026029/0497