CN100345046C - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN100345046C CN100345046C CNB031475205A CN03147520A CN100345046C CN 100345046 C CN100345046 C CN 100345046C CN B031475205 A CNB031475205 A CN B031475205A CN 03147520 A CN03147520 A CN 03147520A CN 100345046 C CN100345046 C CN 100345046C
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- CN
- China
- Prior art keywords
- support member
- backlight module
- fluorescent tube
- diffuser plate
- reflecting plate
- Prior art date
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Abstract
The present invention relates to a back light module which comprises a reflecting plate, a supporting part, a lamp tube and a diffuser plate, wherein the supporting part is arranged on the reflecting plate, the lamp tube is arranged in the supporting part, the diffuser plate is arranged on the reflecting plate, and a certain distance which is prescribed is formed between the diffuser plate and the supporting part. When the supporting part expands, the supporting part is butted with the diffuser plate.
Description
Technical field
The present invention relates to a kind of backlight module, particularly relate to a kind of backlight module that can positively prevent its fluorescent tube and diffuser plate distortion.
Background technology
In the liquid crystal display of general LCD, be to use backlight module as light source, and backlight module is according to the difference of structure, usually can be divided into ora terminalis (edge) formula and straight-down negative two big classes, because The present invention be directed to direct type backlight module improves, the formation of direct type backlight module below only is described, and the explanation of ora terminalis formula backlight module is omitted.
As shown in Figure 1, direct type backlight module 10 comprises a reflecting plate 11, a diffuser plate 12, a plurality of fluorescent tube 13 and a plurality of support column 14; Wherein reflecting plate 11 is positioned at the bottom of backlight module 10, reflects backlight module 10 in order to the light with fluorescent tube 13, and diffuser plate 12 is arranged on the reflecting plate 11 in the mode that coats fluorescent tube 13, and is backlight to form, and fluorescent tube 13 is the light sources as backlight module 10; Support column 14 is to be provided with between reflecting plate 11 and the diffuser plate 12, to support diffuser plate 12, avoids diffuser plate 12 after buckling deformation, makes the optical characteristics variation of backlight module 10.
Yet the shortcoming of above-mentioned backlight module is: when the size of LCD was big more, the fluorescent tube size in the backlight module also can become greatly relatively, and the large-sized fluorescent tube of this kind also has the possibility of distortion, and then influences the optical characteristics of whole LCD.
In order to improve above-mentioned situation, in Japanese patent laid-open 5-119703 number, a kind of backlight module 20 is proposed, it installs support column 24 additional as shown in Figure 2 below fluorescent tube 23, to avoid fluorescent tube 23 distortion, but its shortcoming is: when the size of LCD is big more, diffuser plate size in the backlight module also can become greatly relatively, and the large-sized diffuser plate of this kind also has the possibility of distortion, and then influences the optical characteristics of whole LCD.
In addition, open in 2001-210126 number the Jap.P. spy, another kind of backlight module 30 is proposed, it installs retainer 34 additional as shown in Figure 3 below fluorescent tube 33, to avoid fluorescent tube 33 distortion, and on retainer 34, form a projection 341, itself and diffuser plate 32 butts keeping diffuser plate 32 at assigned position, and then suppress the generation of the even property (mura) of luminance nonuniformity.
Yet above-mentioned backlight module has following shortcoming:
1. because when retainer is set, projection promptly directly with the diffuser plate butt, therefore when the bright lamp of backlight module internal cause and during the temperature rising, projection may thermal expansion and diffuser plate is outwards ejected, can cause diffuser plate buckling deformation laterally on the contrary, and the situation of the even property of luminance nonuniformity is produced.
2. because same retainer need support two fluorescent tubes simultaneously, when the bright lamp of backlight module internal cause and temperature when raising, retainer may thermal expansion and make and can produce relative displacement between two fluorescent tubes, may exert an adverse impact to fluorescent tube; In addition, projection also may produce displacement because of the thermal expansion of retainer, and this also can exert an adverse impact to the diffuser plate with projections.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of backlight module, it can positively prevent fluorescent tube and diffuser plate distortion in it.
According to the present invention, a kind of backlight module is provided, this backlight module comprises a reflecting plate, a support member, a fluorescent tube and a diffuser plate, wherein support member is to be arranged on the reflecting plate, fluorescent tube is to be arranged in the support member, and diffuser plate is to be arranged on the reflecting plate, and and support member between the distance be the spacing of a given size, so that when support member expands, support member can with the diffuser plate butt.
In a preferred embodiment of the invention, support member comprises a fixed part and a support portion, wherein fixed part is to be fixed on the reflecting plate, and the support portion is integrally formed with fixed part, and and distance is the spacing of a given size between the diffuser plate, whereby when support member expands, can make support portion and diffuser plate butt.
The mode that fixed part can be pasted is arranged on the reflecting plate.
In addition, have a perforation on the reflecting plate, and fixed part pass the perforation and be fixed on the reflecting plate; Again, fixed part can have an elastic, and this elastic engages with perforation, so that support member is fixed on the reflecting plate.
In addition, the mode and the diffuser plate butt of contact can be put in the support portion, or the bearing surface of support portion and diffuser plate is a cambered surface.
In another preferred embodiment, fluorescent tube be with and support member between the mode of distance one prescribed distance be arranged in the support member, avoiding when support member expands with heat and contract with cold, support member causes damage to fluorescent tube.
In another preferred embodiment, support member is made by white or transparent material.
In another preferred embodiment, support member is with the mode support luminous tube around fluorescent tube.
Description of drawings
Fig. 1 is the synoptic diagram for the known backlit module;
Fig. 2 is the synoptic diagram for another known backlit module;
Fig. 3 is the synoptic diagram for another known backlit module;
Fig. 4 a is the front view for backlight module of the present invention, supports that wherein platform does not draw;
Fig. 4 b is the synoptic diagram for the support member among Fig. 4 a;
4c figure is the side view of backlight module of the present invention;
Fig. 5 a is the synoptic diagram that changes example for one of support member of the present invention; And
Fig. 5 b is the synoptic diagram for another variation example of support member of the present invention.
Accompanying drawing parts symbol description:
10 backlight modules
11 reflecting plates
12 diffuser plates
13 fluorescent tubes
14 support columns
20 backlight modules
23 fluorescent tubes
24 support columns
30 backlight modules
32 diffuser plates
33 fluorescent tubes
34 retainers
341 projections
100 backlight modules
110 reflecting plates
111 perforation
120 support members
121 support portions
The 121a cambered surface
122 fixed parts
The 122a elastic
The 122b extension
130 fluorescent tubes
140 diffuser plates
150 support platform
G1, g2 gap
100 ' backlight module
110 ' reflecting plate
120 support members
122 ' fixed part
100 " backlight module
120 " support member
121 " contact point
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, be described in detail below below especially exemplified by a preferred embodiment, and with reference to accompanying drawing.
Fig. 4 a shows backlight module 100 of the present invention, it comprises a reflecting plate 110, a plurality of support member 120, a plurality of fluorescent tube 130 and a diffuser plate 140, wherein reflecting plate 110 is the bottoms that are positioned at backlight module 100, reflect backlight module 100 in order to light with fluorescent tube 130, and form a plurality of perforation 111 thereon, use for support member 120 and pass.
Each support member 120 is to be arranged at respectively on the reflecting plate 110, and shown in Fig. 4 b, can be divided into a fixed part 122 and a support portion 121, wherein each fixed part 122 is to pass the perforation 111 of reflecting plate 110 respectively and be fixed on the reflecting plate 110, each support portion 121 then is integrally formed with fixed part 122, and and distance is the spacing g1 of a given size between the diffuser plate 140, whereby when support member 120 expands because of hot factor, support portion 121 can with diffuser plate 140 butts; Specifically, owing to when being provided with, have a spacing g1 between support member 120 and the diffuser plate 140, diffuser plate 140 might be out of shape a little downwards because conduct oneself with dignity and (it should be noted with support member 120 butts this moment, this distortion does not influence the homogeneity of briliancy), raise because of bright lamp makes internal temperature and work as backlight module 100, and then when support member 120 is expanded, be unlikely to therefore and outwards distortion with the diffuser plate 140 of support member 120 butts, but can be maintained at the fixed position, so backlight module 100 does not have the even phenomenon generation of luminance nonuniformity.
Again, support member 120 is formed with two elastic portion 122a on fixed part 122, and it can engage with perforation 111 after fixed part 122 passes perforation 111, so that support member 120 is fixed on the reflecting plate 110; In addition, support member 120 also is formed with two extension 122b on fixed part 122, and support member 120 stably is arranged on the reflecting plate 110; In addition, it should be noted that the mode that fixed part 122 is fixed on the reflecting plate 110 is not limited to this, for example, in the backlight module 100 ' shown in Fig. 5 a, fixed part 122 ' is two flat boards, and can be by adhesive agents such as double faced adhesive tapes and be set on the reflecting plate 110 ' in the mode of pasting.
Shown in 4a, 4b figure, the support portion of support member 120 121 is to be a cambered surface 121a with the bearing surface of diffuser plate 140, and the whole section of support portion 121 is to be curved surface, can make support portion 121 more steady with diffuser plate 140 butts the time whereby; In addition, the generation type that it should be noted support portion 121 is not limited to this, for example, at the backlight module shown in Fig. 5 b 100 " in; support member 120 " support portion 121 " except being curved surface around the part of fluorescent tube 130; remainder is that the mode with straight line extends upward, and with the mode and diffuser plate 140 butts of a contact.
Will be appreciated that support member 120 can be made by white or transparent material be preferred, not hinder the briliancy of backlight module 100; In addition, in the present invention, support member 120 is with the mode support luminous tube 130 around fluorescent tube 130, can give more good supporting of fluorescent tube 130 whereby.
In addition, shown in 4c figure, support member 120 is central parts of support luminous tube 130, but is not limited to this, the length of its visual fluorescent tube and material or diffuser plate size and change it position is set; Again, the set-up mode of support member 120 is not limited to support a fluorescent tube 130 with single support member 120, also can change with the size of fluorescent tube 130, for example, can utilize two support members 120 to support a fluorescent tube 130.
Each fluorescent tube 130 is the light sources as backlight module 100, and be arranged at respectively in the single support member 120, and distance is the spacing g2 of a given size between each fluorescent tube 130 and each support member 120, and whereby when support member 120 expands with heat and contract with cold, spacing g2 can avoid 120 pairs of fluorescent tubes 130 of support member to cause damage
Will be appreciated that backlight module 100 can comprise in addition that two support platform 150, shown in 4c figure, in order to the end of a lamp carrier 130.
As above-mentioned,, can avoid the buckling deformation of fluorescent tube and diffuser plate owing to support member is set in the centre of diffuser plate and reflecting plate; In addition, have small spacing between diffuser plate and the support member, this can be avoided the effect of support member because of expanding with heat and contract with cold, and diffuser plate is outwards ejected; Again, have small spacing between fluorescent tube and the support member, can avoid the effect of support member, and run into fluorescent tube and then fluorescent tube is broken because of expanding with heat and contract with cold; Again, in the present invention, be to support single fluorescent tube with single support member, therefore stable manner support luminous tube more.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; should make the change and the retouching of permission, thus protection scope of the present invention should with claims of applying for a patent scope was defined is as the criterion.
Claims (11)
1. backlight module comprises:
One reflecting plate;
At least one support member, described at least one support member is arranged on this reflecting plate;
At least one fluorescent tube, described at least one fluorescent tube are arranged at respectively in described at least one support member; And
One diffuser plate, this diffuser plate is arranged on this reflecting plate, and and this support member between distance be the spacing of a given size so that when the expansion of this support member, this support member can with this diffuser plate butt.
2. backlight module as claimed in claim 1, each that it is characterized in that described at least one support member comprises:
One fixed part, this fixed part are fixed on this reflecting plate; And
One support portion, this support portion and this fixed part are integrally formed, and and this diffuser plate between the spacing of distance one given size, and when the expansion of this support member, this support portion can with this diffuser plate butt.
3. backlight module as claimed in claim 2 is characterized in that: described at least one fixed part is to be arranged on this reflecting plate in the mode of pasting.
4. backlight module as claimed in claim 2 is characterized in that: have a perforation on this reflecting plate, and this fixed part passes this perforation and be fixed on this reflecting plate.
5. backlight module as claimed in claim 4 is characterized in that: this fixed part has an elastic, and this elastic engages with this perforation, so that described support member is fixed on this reflecting plate.
6. backlight module as claimed in claim 2 is characterized in that: this support portion is with the mode of a contact and this diffuser plate butt.
7. backlight module as claimed in claim 2 is characterized in that: the bearing surface of this support portion and this diffuser plate is to be a cambered surface.
8. backlight module as claimed in claim 1, it is characterized in that: described at least one fluorescent tube be with and corresponding support member between the distance one prescribed distance mode be arranged in this support member, avoiding when this support member expands with heat and contract with cold, this support member causes damage to this fluorescent tube.
9. backlight module as claimed in claim 1 is characterized in that: described at least one support member is made by white or transparent material.
10. backlight module as claimed in claim 1 is characterized in that: described at least one support member is to support this fluorescent tube in the mode around this fluorescent tube.
11. any described backlight module in the claim as the front, it is characterized in that: the quantity of described at least one support member and described at least one fluorescent tube is a plurality of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031475205A CN100345046C (en) | 2003-07-09 | 2003-07-09 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031475205A CN100345046C (en) | 2003-07-09 | 2003-07-09 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1567059A CN1567059A (en) | 2005-01-19 |
| CN100345046C true CN100345046C (en) | 2007-10-24 |
Family
ID=34471968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031475205A Expired - Fee Related CN100345046C (en) | 2003-07-09 | 2003-07-09 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100345046C (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI254175B (en) | 2005-01-19 | 2006-05-01 | Au Optronics Corp | Backlight modules |
| CN100353231C (en) * | 2005-03-04 | 2007-12-05 | 友达光电股份有限公司 | Back light module |
| CN100335954C (en) * | 2005-04-18 | 2007-09-05 | 友达光电股份有限公司 | Backlight module structure |
| CN100378544C (en) * | 2005-06-22 | 2008-04-02 | 友达光电股份有限公司 | Backlight module and holding frame for luminous tube |
| TWI315014B (en) | 2005-12-26 | 2009-09-21 | Au Optronics Corporatio | Backlight module of flat panel display |
| CN100388090C (en) * | 2006-01-16 | 2008-05-14 | 友达光电股份有限公司 | Backlight module of flat display panel |
| KR101345338B1 (en) | 2006-07-20 | 2013-12-27 | 삼성디스플레이 주식회사 | Liquid crystal display |
| CN101329471B (en) * | 2007-06-22 | 2010-09-29 | 群康科技(深圳)有限公司 | Backlight module unit, lamp tube clamping device and LCD device |
| CN101482668B (en) * | 2008-01-07 | 2012-01-04 | 奇美电子股份有限公司 | Light tube fixing rack of backlight module and display element using the same |
| CN101251681B (en) * | 2008-04-09 | 2012-09-19 | 友达光电股份有限公司 | Backlight module with supporting device |
| US8485685B2 (en) | 2010-06-17 | 2013-07-16 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and lamp fastener thereof |
| CN101881424B (en) * | 2010-06-17 | 2011-11-16 | 深圳市华星光电技术有限公司 | Backlight module and lamp tube support frame thereof |
| CN202631895U (en) * | 2012-05-23 | 2012-12-26 | 京东方科技集团股份有限公司 | Backlight fixed structure of liquid crystal display device |
| CN104849907A (en) * | 2014-02-18 | 2015-08-19 | 冠捷投资有限公司 | Light diffuser plate supporting nail and backlight module set |
| CN104765198A (en) * | 2015-04-22 | 2015-07-08 | 京东方科技集团股份有限公司 | Straight-down backlight source and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05119703A (en) * | 1991-10-24 | 1993-05-18 | Nec Corp | Backlight |
| CN1164039A (en) * | 1996-03-20 | 1997-11-05 | 三星电管株式会社 | Consecutive illuminating backlight assembly for LCD employing fluorescent layer |
| JP2000321574A (en) * | 1999-05-11 | 2000-11-24 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| JP2001210126A (en) * | 2000-01-31 | 2001-08-03 | Sharp Corp | Lamp holder and back light device |
| JP2002372933A (en) * | 2001-06-15 | 2002-12-26 | Koichi Matsui | Perpendicular type illumination device |
-
2003
- 2003-07-09 CN CNB031475205A patent/CN100345046C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05119703A (en) * | 1991-10-24 | 1993-05-18 | Nec Corp | Backlight |
| CN1164039A (en) * | 1996-03-20 | 1997-11-05 | 三星电管株式会社 | Consecutive illuminating backlight assembly for LCD employing fluorescent layer |
| JP2000321574A (en) * | 1999-05-11 | 2000-11-24 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| JP2001210126A (en) * | 2000-01-31 | 2001-08-03 | Sharp Corp | Lamp holder and back light device |
| JP2002372933A (en) * | 2001-06-15 | 2002-12-26 | Koichi Matsui | Perpendicular type illumination device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1567059A (en) | 2005-01-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071024 Termination date: 20210709 |