Source: http://www.google.com/patents/US7855762?ie=ISO-8859-1
Timestamp: 2014-10-31 06:32:17
Document Index: 687735923

Matched Legal Cases: ['Application No. 2004', 'art 42', 'art 42', 'art 48', 'art 42', 'art 48', 'art 42', 'art 48', 'art 42', 'art 48', 'art 42', 'art 48', 'art 42', 'art 48', 'art 42', 'art 48', 'art 42', 'art 42', 'art 48', 'art 42', 'art 48', 'art 42', 'art 42', 'art 42', 'art 42', 'art 42', 'art 42', 'art 48', 'arts 42', 'art 72', 'art 78', 'art 72']

Patent US7855762 - Liquid crystal module - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA liquid crystal module includes: a first support part for receiving and affixing ends of a plurality of lamps; an optical plate disposed above an upper surface of the first support part; a second support part for retaining the optical plate and having a lower surface above the optical plate, wherein...http://www.google.com/patents/US7855762?utm_source=gb-gplus-sharePatent US7855762 - Liquid crystal moduleAdvanced Patent SearchPublication numberUS7855762 B2Publication typeGrantApplication numberUS 12/292,279Publication dateDec 21, 2010Filing dateNov 14, 2008Priority dateApr 29, 2004Fee statusPaidAlso published asUS7463313, US20050243244, US20090073341Publication number12292279, 292279, US 7855762 B2, US 7855762B2, US-B2-7855762, US7855762 B2, US7855762B2InventorsDong Im HuoOriginal AssigneeLg Display Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (12), Classifications (15), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetLiquid crystal moduleUS 7855762 B2Abstract A liquid crystal module includes: a first support part for receiving and affixing ends of a plurality of lamps; an optical plate disposed above an upper surface of the first support part; a second support part for retaining the optical plate and having a lower surface above the optical plate, wherein the upper surface of the first support part or the lower surface of the second support part has a recessed portion contacting the optical plate such that a gap is formed between the optical plate, and one of the upper surface of the first support part and the lower surface of the second support part.
a first support part for receiving and affixing ends of a plurality of lamps;
an optical plate contacting an upper surface of the first support part;
a second support part affixed to the first support part for retaining the optical plate,
wherein the upper surface of the first support part has a series of recessed portions with ribs between the recessed portions such that the ribs contact a lower surface of the optical plate.
3. The liquid crystal module according to claim 1, further comprising:
a reflection sheet disposed below the plurality of lamps, for reflecting light from the plurality of lamps toward a display surface; and
a plurality of optical sheets disposed between the optical plate and the liquid crystal panel.
4. The liquid crystal module according to claim 1, wherein the first support part and the second support part are coupled to each other by a coupler.
5. The liquid crystal module according to claim 1, wherein the first support part and the second support part are formed integrally with each other as a single body.
6. The liquid crystal module according to claim 1, wherein the recessed potions are the same size such that the ribs are at a constant interval.
7. The liquid crystal module according to claim 1, wherein a lower surface of the second support part has a series of recessed portions with ribs between the recessed portions such that the ribs contact an upper surface of the optical plate.
This application is a divisional of prior application Ser. No. 11/116,202, filed Apr. 28, 2005, now U.S. Pat. No. 7,463,313, and claims the benefit of Korean Patent Application No. 2004-29874, filed in Korea on Apr. 29, 2004, which is hereby incorporated by reference for all purposes as if fully set forth herein.
An liquid crystal display (LCD) is replacing the CRT because an LCD has the advantages of a slim profile, light weight and low power consumption has been actively developed. The development of the LCD has recently progressed to such a degree that it can sufficiently perform a role as a flat panel display. As a result, LCDs are being used as monitors in laptop computers, desktop computers, outdoor large-sized screens above 30 inches, and flat panel wall-mounted TVs. The demand for such products continues to increase.
Referring to FIGS. 1 and 2, the related art liquid crystal module includes a support side 12 for receiving and affixing ends of a plurality of lamps 10, a diffuser plate 14 with a side in contact with an upper surface of the support side 12, and a guide panel 18 affixing the diffuser plate 14 to the support side 12. A liquid crystal panel (not shown) is disposed on the diffuser plate 14 when the liquid crystal module is in use. A reflection sheet 16 for reflecting the light projected by the lamps 10 toward a liquid crystal panel (not shown) is disposed below the lamps 10. Further, a plurality of optical sheets (not shown) may be inserted between the diffuser plate 14 and the liquid crystal panel (not shown).
The guide panel 18 and the support side 12 are coupled to each other by a coupling means, such as a bolt 19 or the like. Thus, the diffuser plate 14 is affixed to the support side 12. A continuous face of the support side 12 contacts the diffuser plate 14 at an area �A�. However, the related art liquid crystal module has a drawback in that its components expand and move due to changes in temperature. This expansion or movement can cause noise because of friction between the components.
FIG. 3 is a perspective view of the top and side surfaces of the support side shown in FIGS. 1 and 2. As shown in FIG. 3, the support side 12 according to the related art has a top surface in which a portion �A� contacts the diffuser plate 14 in a continuous strip. A frictional noise is generated because the diffuser plate 14 is held down against the support side 12 across the entire surface of the continuous strip of portion �A� when the diffuser plate 14 moves with respect to the support side 12 due to expansion or contraction of the diffuser plate 14 resulting from temperature changes.
SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a liquid crystal module that substantially obviates one or more problems due to limitations and disadvantages of the related art.
The first support part 42 has an upper surface with recessed portion 43. The optical plate 44 contacts the upper surface at the recessed portion 43 such that a predetermined gap �g� is formed between the optical plate 44 and the first support part 42 or the second support part 48. Since the first support part 42 has an upper surface with a recessed portion 43 contacting the optical plate 44, the gap �g� is formed between the optical plate 44 and the second support part 48 and accordingly the optical plate 44 is not forced against the upper surface of the first support part 42 or against the lower surface of and second support part 48.
If the optical plate 44 expands due to an increase in temperature in liquid crystal module described above, a frictional noise is not generated between the optical plate 44 and either the first support part 42 or the second support part 48. This is because the lower surface of the optical plate 44 is not held against a face or upper surface of the first support part 42, or the upper surface of the optical plate 44 is not held against a face or lower surface of the second support part 48. Instead, the optical plate 44 is loosely encapsulated by the first support part 42 and the second support part 48 with a gap �g� such that less friction is generated between the lower surface of the optical plate 44 and upper surface of the first support part 42 as well as between the upper surface of the optical plate 44 and the lower surface of the second support part 48, so that a frictional noise is not generated.
As shown in FIGS. 4 and 5. A region �B� of the upper surface for the first support part 42 contacting the optical plate 44 is intagliated or formed to have a recessed portion. Although the first support part 42 is coupled with and affixed to the second support part 48, a gap �g� is kept between the optical plate 44 and the first support part 42 or the second support part 48. Thus, when power is applied to the liquid crystal module or an applied power is turned off, although the optical plate 44 expands or contracts due to an increase or a decrease in temperature, friction between upper and lower sides of the optical plate is reduced such that noise generation caused by friction is prevented.
FIG. 6 is a perspective view of the top and side surfaces of the first support part shown in FIGS. 4 and 5. The shape of the first support part 42 will be described in more detail in reference to FIG. 6. The first support part 42, as shown in FIG. 6 has an upper surface with a recessed portion 43 contacting the optical plate 44. The recessed portion is formed by partially removing a continuous strip of the first support part 42 that would otherwise cause friction between the optical plate 44 and the first support part 42. In other words, the upper surface of the first support part 42 is intagliated or recessed to form a recessed portion 43. Accordingly, when the first support part 42 is coupled with the second support part 48, a gap �g� is formed between the optical plate 44 and one of the first and second support parts 42 and 48. Although the optical plate 44 expands or contracts due to an increase or a decrease in temperature, friction between the optical plate 44 and the support parts adjacent thereto is minimized so as to prevent frictional noise generation.
To decrease a contact area between the lower side of the optical plate 74, and the upper surface of the first support part 72 or the lower surface of the second support part 78, the upper surface of the first support part 72 contacts the optical plate 74 with a rib 75 between each of the recessed portions 73. The recessed portions 73 can be the same size such that the ribs 75 amongst the series of recessed portions 73 can be at a constant interval.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6867825 *Apr 16, 2002Mar 15, 2005Nec Lcd Technologies, Ltd.Liquid crystal display deviceUS6919937Apr 2, 2002Jul 19, 2005Samsung Electronics Co., Ltd.Liquid crystal display apparatusUS7027111May 18, 2004Apr 11, 2006Hitachi, Ltd.Liquid crystal display device having nut member fixed on housingUS7154571Mar 30, 2006Dec 26, 2006Hitachi, Ltd.Liquid crystal display deviceUS7283184Dec 23, 2002Oct 16, 2007Lg.Philips Co., Ltd.Structure for assembling lamp wire for backlight assembly into liquid crystal display moduleUS7722242 *Aug 28, 2007May 25, 2010Chi Mei Optoelectronics Corp.Lamp fixing structure and backlight moduleUS20030058380Apr 2, 2002Mar 27, 2003Kim Dong-CheolLiquid crystal display apparatusUS20080129918Nov 29, 2007Jun 5, 2008Lg. Philips Lcd Co., Ltd.Liquid crystal display device and method of fabricating thereofUS20100097524 *Dec 3, 2007Apr 22, 2010Yasumori KuromizuOptical member, lighting device, display device and television receiverKR101000874B1 Title not availableKR19990008719A Title not availableKR20040032162A Title not available* Cited by examinerClassifications U.S. Classification349/58, 349/67, 349/62, 349/98, 345/87, 349/64, 345/7International ClassificationG02F1/13357, G02F1/1343, F21V8/00, G02F1/1333, G02F1/1335Cooperative ClassificationG02F1/133606, G02F1/133608European ClassificationG02F1/1336B5Legal EventsDateCodeEventDescriptionApr 22, 2014FPAYFee paymentYear of fee payment: 4Nov 8, 2010ASAssignmentOwner name: LG DISPLAY CO., LTD., KOREA, REPUBLIC OFEffective date: 20080304Free format text: CHANGE OF NAME;ASSIGNOR:LG.PHILIPS LCD CO., LTD.;REEL/FRAME:025331/0429Nov 14, 2008ASAssignmentOwner name: LG. PHILIPS LCD CO., LTD., KOREA, REPUBLIC OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HUO, DONG IM;REEL/FRAME:021914/0830Effective date: 20050426RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google