CN100495154C

CN100495154C - Backlight assembly

Info

Publication number: CN100495154C
Application number: CNB2005100058338A
Authority: CN
Inventors: 赖清坤; 李重德
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2005-01-27
Filing date: 2005-01-27
Publication date: 2009-06-03
Anticipated expiration: 2025-01-27
Also published as: CN1632664A

Abstract

It is an aphototropism element, which comprises backboard, diffusion plate, supporting part and multiple tubes. The diffusion plate is set on the backboard and the supporting part is set between the backboard and the diffusion plate. The supporting part comprises a socket and one fixing part, wherein; the fixing part has one supporting part contacted with the diffusion plate to avoid the bending of the diffusion plate. The multiple tubes are set between the socket and fixing part as the light source of aphototropism element.

Description

Backlight assembly

Technical field

The present invention relates to a kind of backlight assembly, particularly relate to and a kind ofly have spacer member and make and kept both backlight assembly of set a distance between diffuser plate and the light source.

Background technology

General LCD be with backlight assembly as light source, and backlight assembly is provided with the position difference according to light source, can be divided into side-light type and straight-down negative two big classes usually.As shown in Figure 1, direct type backlight assembly 10 comprises a reflex housing 11, a diffuser plate 12, a plurality of support column 13 and a plurality of fluorescent tube 14.Reflex housing 11 is positioned at the bottom of backlight assembly 10, and diffuser plate 12 is arranged on the reflex housing 11, and fluorescent tube 14 is arranged between reflex housing 11 and the diffuser plate 12, and reflex housing 11 can reflect the light of fluorescent tube 14 backlight assembly 10, as the light source of plane demonstration.Support column 13 is arranged between reflex housing 11 and the diffuser plate 12, in order to support diffuser plate 12, can avoid diffuser plate 12 buckling deformations, and make the optical characteristics variation of backlight assembly 10.

Secondly, in the large scale liquid crystal display, the fluorescent tube of backlight assembly is longer, very easily rocks deformation fracture because of assembly.Therefore, in order to improve above-mentioned situation, the known practice is to wear several transparent O shape rings 15 with manual type on fluorescent tube, suitably supports so that fluorescent tube 14 to be provided, and avoids fluorescent tube excessively to rock.

But above-mentioned steps is not only taken a lot of work and is time-consuming, and in addition, fluorescent tube 14 encircles at 15 o'clock wearing O shape, very easily damages because of misoperation.

Summary of the invention

In view of this; purpose of the present invention just is to provide a kind of support member easy to assembly; except preventing the diffuser plate distortion; keep outside the spacing of diffuser plate and fluorescent tube; effective support luminous tube also; avoid the fluorescent tube deformed damaged, the while more can be saved the package program of O type ring and still be had the function of protection fluorescent tube.

Aforementioned present in order to realize, according to an aspect of the present invention, provide a kind of backlight assembly, comprising: a backboard; One is arranged at the diffuser plate of this backboard; One is arranged at the support member between this backboard and this diffuser plate, this support member is fixed on this backboard, and it comprises a base and a fixture, this fixture has a support portion and this diffuser plate butt, wherein this base has a plurality of supporting parts, this fixture has a plurality of and the corresponding curved portions of these supporting parts, and this support zone is between two adjacent curved portions; And be arranged at a plurality of fluorescent tubes between these supporting parts and these curved portions.

According to a further aspect in the invention, provide a kind of support member, be applicable to backlight assembly, this backlight assembly has a diffuser plate and a plurality of fluorescent tube, and this support member comprises: one has the base of a plurality of supporting parts; One is arranged at the fixture on the base, this fixture has a support portion and a plurality of curved portions, and wherein this support portion is connected to this diffuser plate, and these curved portions are corresponding with these supporting parts, to fix these fluorescent tubes, wherein this support zone is between two adjacent curved portions.

According to another aspect of the invention, provide a kind of backlight assembly, comprising: a backboard; One is arranged at the diffuser plate of this backboard; One is arranged at the support member between this backboard and this diffuser plate, and this support member is fixed on this backboard, and it comprises a base and a fixture, and this fixture has a support portion and this diffuser plate butt; And be arranged at a plurality of fluorescent tubes between this base and this fixture; Wherein, this support member is positioned at the light-emitting zone of these fluorescent tubes.

In addition, the invention provides a kind of backlight assembly, comprise backboard, diffuser plate, support member and a plurality of fluorescent tube.Diffuser plate is arranged on the backboard, support member is arranged between backboard and the diffuser plate, and support member comprises base and fixture, fixture has the support portion and diffuser plate connects, can avoid diffuser plate flexural deformation, and a plurality of fluorescent tubes are arranged at intervals between reflector plate and the diffuser plate by base and fixture clamping, as the light source of backlight assembly.

In above-mentioned backlight assembly, support member can be by transparent or white material is made, and support zone is between two adjacent curved portions, and with the mode and the diffuser plate butt of a contact.Base has first hook part in addition, and base is fixed with first hook part and backboard, and fixture has second hook part, and fixture links by second hook part and base, and is fixed on the backboard.

Secondly, base has a plurality of supporting parts, and fixture has a plurality of and the corresponding curved portions of supporting part, when fixture and base binding, and supporting part and the corresponding mode fixed lamp tube of curved portions to center on.Again, have a both fixed gap between fluorescent tube and curved portions, provide support the nargin of part and fluorescent tube expanded by heating.

For above-mentioned and other purpose of the present invention, feature and advantage can be become apparent,, and elaborate in conjunction with the accompanying drawings below especially exemplified by concrete preferred embodiment.

Description of drawings

Fig. 1 is the sectional view that shows known direct type backlight assembly;

Fig. 2 is the sectional view that shows direct type backlight assembly of the present invention;

Fig. 3 is the exploded view that shows direct type backlight assembly of the present invention;

Fig. 4 is the enlarged drawing of regional a in the displayed map 2;

Fig. 5 is another embodiment synoptic diagram of direct type backlight assembly of the present invention; And

Fig. 6 is the synoptic diagram of reflector plate in the direct type backlight assembly of the present invention.

Symbol description:

10 known direct type backlight assemblies

11 reflex housings

12 diffuser plates

13 support columns

14 fluorescent tubes

15 O shapes ring

20 direct type backlight assemblies of the present invention

21 backboards

22 reflector plates

221 222 perforation

23 diffuser plates

24 fluorescent tubes

25 screws

30 support members

31 bases

311 supporting parts

312 first hook parts

313 perforation

32 fixtures

321 support portions

322 curved portions

323 323 ' second hook part

The g gap

Embodiment

The direct type backlight assembly of a preferred embodiment of the present invention as shown in Figure 2, wherein, for simplified, Fig. 2 only shows supporting construction and five fluorescent tubes of an Improvement type, but during practical application, not limited by this.

Direct type backlight assembly 20 of the present invention comprises backboard 21, reflector plate 22, diffuser plate 23, a plurality of fluorescent tube 24 and support member 30.The surface of backboard 21 is provided with a plurality of reflector plates 22, in order to reflection ray; Diffuser plate 23 is installed on the backboard 21, surrounds the space to form one; Support member 30 is arranged between reflector plate 22 and the diffuser plate 23, comprises a base 31 and a fixture 32, and a plurality of fluorescent tubes 24 are arranged at intervals between reflector plate 22 and the diffuser plate 23, as the light source of backlight assembly by base 31 and fixture 32 clampings.Wherein fixture 32 has a support portion 321 and diffuser plate 23 butts, can avoid the diffuser plate of large scale backlight assembly to be bent downwardly distortion because of gravity, causes the even situation of backlight assembly luminance nonuniformity.

As shown in Figure 2, the base 31 of support member 30 has a plurality of supporting parts 311 and one first hook part 312, fixture 32 has a plurality of and supporting part 311 corresponding curved portions 322, wherein the base 31 of support member 30 and fixture 32 all are one of the forming, base 31 can be fixed by first hook part 312 and backboard 21 and reflector plate 22, after on each supporting part 311 that fluorescent tube 24 correspondences is placed on base 31, fixture 32 is again with second hook part 323,323 ' links with base 31 and is fixed with backboard 21, makes the corresponding mode fixed lamp tube 24 of curved portions 322 to center on the supporting part 311 of base 31 and the fixture 32.

Fig. 3 is the exploded view of direct type backlight assembly of the present invention, in conjunction with reference the 2nd and 3 figure, when assembling during direct type backlight assembly 20, pass reflector plate 22 and backboard 21 with first hook part 312 of base 31 via perforation 221 earlier and then engage with backboard 21, make base 31 be fixed in backboard 21; Then fluorescent tube 24 is installed, and is provided each suitable support of fluorescent tube 24 interlude portions with the supporting part 311 of base 31 in the direction vertical with base 31.After fluorescent tube 24 installations, after earlier second hook part 323 in fixture 32 left sides being passed reflector plate 22 and backboard 21 and then catches on backboard 21 via perforation 222, another second hook part 323 ' with fixture 32 right sides passes the perforation 313 on the base 31 in regular turn and bores a hole 221 again, make fixture 32 be fixed on the base 31, and fluorescent tube 24 therefore also be fixed in base 31 supporting part 311 and and fixture 32 between the corresponding curved portions 322, so can avoid fluorescent tube 24 impaired because of excessively rocking.At last, diffuser plate 23 is fixed on the backboard 21, finishes a direct type backlight assembly 20.

Secondly, above-mentioned support member 30 is made by the plastics or the heat resistant rubber of transparent or white material, support portion 321 is between two adjacent on the fixture 32 curved portions 322, and, can make diffuser plate 23 and reflector plate and fluorescent tube 24 keep a default diffusion length with the mode and diffuser plate 23 butts of a contact.

In addition, for support member 30 being fixed on really on backboard 21 and the reflector plate 22, can be at the bottom surface of base 31 coating binder, or as shown in Figure 3, with screw 25 base 31 and fixture 32 are locked on backboard 21 and the reflector plate 22 together, to increase the assembling precision of direct type backlight assembly 20.

Fig. 4 is the enlarged drawing of regional a among Fig. 2, as shown in Figure 4, because the fluorescent tube 24 that backlight assembly adopted also can produce high heat simultaneously when luminous, therefore, 322 of the fluorescent tube 24 of direct type backlight assembly 20 of the present invention and curved portions have a gap g, can provide support the suitable thermal expansion nargin of part 30 and fluorescent tube 24.

Secondly, support member 30 of the present invention also can separate uses as shown in Figure 5, and also, the base 31 and the fixture 32 of support member 30 are alternately arranged on the reflector plate 22, and is fixing whereby and protect fluorescent tube 24, and the while also provides diffuser plate 23 suitable support with support portion 321.

In addition, as shown in Figure 6, in direct type backlight assembly of the present invention, can comprise the multi-disc reflector plate, that is to say that above-mentioned reflector plate 22 can be made up of multi-disc.

In sum, the employed support member of backlight assembly of the present invention is divided into two and half ones up and down, very simple when installation and fixed lamp tube, and the support portion can provide the middle part of diffuser plate suitable support, can avoid the diffuser plate of large scale backlight assembly to be bent downwardly distortion, the brilliant degree inequality that causes backlight assembly to provide because of gravity.

Though the present invention discloses as above with a plurality of preferred embodiments; yet it 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; still can various changes and retouching, so protection scope of the present invention should be with being as the criterion that claims were defined.

Claims

1. backlight assembly comprises:

One backboard;

One is arranged at the diffuser plate of this backboard;

One is arranged at the support member between this backboard and this diffuser plate, this support member is fixed on this backboard, and it comprises a base and a fixture, this fixture has a support portion and this diffuser plate butt, wherein this base has a plurality of supporting parts, this fixture has a plurality of and the corresponding curved portions of these supporting parts, and this support zone is between two adjacent curved portions; And

Be arranged at a plurality of fluorescent tubes between these supporting parts and these curved portions.

2. backlight assembly as claimed in claim 1 is characterized in that: this base has one first hook part, and this base is fixed with this first hook part and this backboard.

3. backlight assembly as claimed in claim 2 is characterized in that: this fixture has one second hook part, and this fixture is fixed with this second hook part and this backboard.

4. backlight assembly as claimed in claim 1 is characterized in that: when this fixture was arranged at this base, these supporting parts and these corresponding curved portions were fixed these fluorescent tubes in the mode that centers on.

5. backlight assembly as claimed in claim 1 is characterized in that: this support portion is with mode and this diffuser plate butt of a contact.

6. backlight assembly as claimed in claim 1 is characterized in that: have a gap between these fluorescent tubes and these curved portions.

7. backlight assembly as claimed in claim 1 is characterized in that: this support member is by transparent or white material is made.

8. backlight assembly as claimed in claim 1 is characterized in that: comprise that also multi-disc is arranged at the reflector plate on the backboard.

9. a support member is applicable to backlight assembly, and this backlight assembly has a diffuser plate and a plurality of fluorescent tube, and this support member comprises:

One has the base of a plurality of supporting parts;

One is arranged at the fixture on the base, this fixture has a support portion and a plurality of curved portions, and wherein this support portion is connected to this diffuser plate, and these curved portions are corresponding with these supporting parts, to fix these fluorescent tubes, wherein this support zone is between two adjacent curved portions.

10. support member as claimed in claim 9 is characterized in that: this support member is by transparent or white material is made.