CN1632664A - Backlight component - Google Patents

Abstract

A backlight assembly includes a housing, a diffuser plate, a supporter and a plurality of lamps. The diffusion plate is arranged on the back plate, the supporting piece is arranged between the back plate and the diffusion plate and comprises a base and a fixing piece, the fixing piece is provided with a supporting part which is abutted against the diffusion plate and can prevent the diffusion plate from bending and deforming, and the plurality of lamp tubes are arranged between the base and the fixing piece and used as light sources of the backlight assembly.

Description

Backlight component

technical field

The present invention relates to a backlight assembly, in particular to a backlight assembly with a spacer to maintain a predetermined distance between a diffuser plate and a light source.

Background technique

Generally, a liquid crystal display uses a backlight assembly as a light source, and the backlight assembly can be divided into two types: side-light type and direct-light type, depending on the location of the light source. As shown in FIG. 1 , the direct-lit backlight assembly 10 includes a reflector 11 , a diffusion plate 12 , a plurality of support columns 13 and a plurality of lamp tubes 14 . The reflector 11 is located at the bottom of the backlight assembly 10, the diffusion plate 12 is arranged on the reflector 11, the lamp tube 14 is arranged between the reflector 11 and the diffuser plate 12, the reflector 11 can reflect the light of the lamp tube 14 out of the backlight assembly 10 , as the light source for the planar display. The support column 13 is disposed between the reflection cover 11 and the diffuser plate 12 to support the diffuser plate 12 to prevent the diffuser plate 12 from being warped and deformed, which may degrade the optical properties of the backlight assembly 10 .

Secondly, in large-size liquid crystal displays, the lamp tube of the backlight assembly is relatively long, which is easily deformed and broken due to shaking of the assembly. Therefore, in order to improve the above situation, a known method is to artificially thread several transparent O-rings 15 on the lamp tube to provide proper support for the lamp tube 14 and avoid excessive shaking of the lamp tube.

However, the above steps are labor-intensive and time-consuming. In addition, when the lamp tube 14 is passed through the O-ring 15, it is very easy to be damaged due to improper operation.

Contents of the invention

In view of this, the purpose of the present invention is to provide a support member that is easy to assemble. In addition to preventing the diffusion plate from deforming and maintaining the distance between the diffusion plate and the lamp tube, it can also effectively support the lamp tube to avoid deformation and damage to the lamp tube. Furthermore, the assembly process of the O-ring can be omitted and still have the function of protecting the lamp tube.

The invention provides a backlight assembly, which includes a backboard, a diffuser board, a support piece and a plurality of lamp tubes. The diffuser plate is arranged on the back plate, and the support member is arranged between the back plate and the diffuser plate, and the support member includes a base and a fixing member, and the fixing member has a support portion abutting against the diffuser plate, so as to avoid bending deformation of the diffuser plate, and multiple The lamp tube is clamped by the base and the fixing part, and is arranged at intervals between the reflection sheet and the diffusion plate, and serves as the light source of the backlight assembly.

In the above-mentioned backlight assembly, the support member may be made of transparent or white material, and the support part is located between two adjacent arc-shaped parts, and abuts against the diffuser plate in a point contact manner. The base also has a first hook part, the base is fixed by the first hook part and the backboard, and the fixing part has a second hook part, the fixing part is connected with the base through the second hook part, and fixed on the backboard superior.

Secondly, the base has a plurality of bearing parts, and the fixing member has a plurality of arc-shaped parts corresponding to the bearing parts. When the fixing member is connected to the base, the bearing parts and the corresponding arc-shaped parts surround and fix the lamp tube. Moreover, there is a predetermined gap between the lamp tube and the arc portion, which provides a margin for thermal expansion of the support member and the lamp tube.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, specific preferred embodiments are specifically cited below and described in detail in conjunction with the accompanying drawings.

Description of drawings

1 is a sectional view showing a known direct type backlight assembly;

2 is a sectional view showing a direct type backlight assembly of the present invention;

3 is an exploded view showing the direct type backlight assembly of the present invention;

Figure 4 is an enlarged view showing area a in Figure 2;

5 is a schematic diagram of another embodiment of the direct type backlight assembly of the present invention; and

FIG. 6 is a schematic diagram of a reflective sheet in a direct type backlight assembly of the present invention.

Symbol Description:

10 Known direct type backlight assembly

11 reflector

12 diffuser plate

13 support column

14 lamps

15 O-rings

20 The direct type backlight assembly of the present invention

21 Backplane

22 Reflectors

221 222 perforation

23 Diffusion plate

24 tubes

25 screws

30 supports

31 base

311 bearing part

312 The first hook part

313 perforation

32 Fixing parts

321 support part

322 Arc

323 323' second hook part

g gap

Detailed ways

A direct-lit backlight assembly of a preferred embodiment of the present invention is shown in FIG. 2 . In order to simplify the diagram, FIG. 2 only shows an improved support structure and five lamp tubes, but it is not limited to this in practical application.

The direct type backlight assembly 20 of the present invention includes a backplane 21 , a reflection sheet 22 , a diffusion plate 23 , a plurality of lamp tubes 24 and a support member 30 . The surface of the back plate 21 is provided with a plurality of reflective sheets 22 for reflecting light; the diffuser plate 23 is installed on the back plate 21 to form an enclosed space; the support member 30 is arranged between the reflective sheet 22 and the diffuser plate 23, including a The base 31 and a fixing part 32 are clamped by the base 31 and the fixing part 32 , and are arranged at intervals between the reflection sheet 22 and the diffuser plate 23 , serving as light sources of the backlight assembly. The fixing member 32 has a support portion 321 abutting against the diffuser plate 23, which can prevent the diffuser plate of the large-size backlight assembly from bending downward due to gravity, resulting in uneven luminance of the backlight assembly.

As shown in Figure 2, the base 31 of the support member 30 has a plurality of bearing parts 311 and a first hook part 312, and the fixing member 32 has a plurality of arc-shaped parts 322 corresponding to the bearing parts 311, wherein the support member 30 Both the base 31 and the fixing part 32 are integrally formed. The base 31 can be engaged and fixed with the back plate 21 and the reflector 22 through the first hook part 312. After placing the lamp tubes 24 on the bearing parts 311 of the base 31 , the fixing part 32 is then connected with the base 31 by the second hook parts 323, 323' and engaged and fixed with the back plate 21, so that the bearing part 311 of the base 31 and the corresponding arc part 322 on the fixing part 32 are in a surrounding manner Fix the lamp tube 24.

FIG. 3 is an exploded view of the direct-type backlight assembly of the present invention. Referring to FIGS. 2 and 3, when assembling the direct-type backlight assembly 20, firstly use the first hook portion 312 of the base 31 to pass through the reflective sheet 22 and the through hole 221. The back plate 21 is further engaged with the back plate 21, so that the base 31 is fixed on the back plate 21; then, the lamp tubes 24 are installed in a direction perpendicular to the base 31, and the middle section of each lamp tube 24 is provided with the supporting portion 311 of the base 31. support. After the lamp tube 24 is installed, the second hook part 323 on the left side of the fixing part 32 is passed through the reflector 22 and the backboard 21 through the perforation 222 to hook the backboard 21, and then the second hook part 323 on the right side of the fixing part 32 is hooked to the backboard 21. Another second hook part 323' passes through the through hole 313 and the through hole 221 on the base 31 in sequence, so that the fixing member 32 is fixed on the base 31, and the lamp tube 24 is thus fixed on the bearing part 311 of the base 31 and fixed Between the corresponding arc portions 322 on the member 32, the lamp tube 24 can be prevented from being damaged due to excessive shaking. Finally, the diffuser plate 23 is fixed on the back plate 21 to complete the direct-type backlight assembly 20 .

Secondly, the above-mentioned supporting member 30 is made of transparent or white plastic or heat-resistant rubber. The supporting part 321 is located between the two adjacent arc-shaped parts 322 on the fixing member 32, and is in point contact with the diffuser plate 23. The abutment can make the diffusion plate 23 maintain a preset diffusion distance with the reflection sheet and the lamp tube 24 .

In addition, in order to securely fix the supporting member 30 on the back plate 21 and the reflecting sheet 22, an adhesive can be applied on the bottom surface of the base 31, or as shown in FIG. 3 , the base 31 and the fixing member 32 can be locked together with screws 25 On the backplane 21 and the reflection sheet 22 , the assembly precision of the direct-lit backlight assembly 20 is increased.

Fig. 4 is an enlarged view of area a in Fig. 2. As shown in Fig. 4, since the lamp tube 24 used in the backlight assembly also generates high heat when emitting light, the lamp tube 24 of the direct-lit backlight assembly 20 of the present invention and the There is a gap g between the arc portions 322 , which can provide a proper thermal expansion margin for the supporting member 30 and the lamp tube 24 .

Secondly, the support 30 of the present invention can also be used separately as shown in FIG. And the support portion 321 provides proper support for the diffuser plate 23 .

In addition, as shown in FIG. 6 , the direct-lit backlight assembly of the present invention may include multiple reflective sheets, that is, the above-mentioned reflective sheet 22 may be composed of multiple pieces.

To sum up, the support used in the backlight assembly of the present invention is divided into upper and lower halves, which is very simple when installing and fixing the lamp tube, and the support part can provide proper support for the middle part of the diffuser plate, which can avoid large The diffuser plate of the size backlight assembly is bent downward due to gravity, resulting in uneven luminance provided by the backlight assembly.

Although the present invention has been disclosed above with a number of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and changes without departing from the spirit and scope of the present invention. modification, so the protection scope of the present invention should be defined by the claims.

Claims (13)

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, and this support member 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.

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: this base has a plurality of supporting parts, and this fixture has a plurality of and the corresponding curved portions of these supporting parts, to fix these fluorescent tubes.

5. backlight assembly as claimed in claim 4 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.

6. backlight assembly as claimed in claim 5 is characterized in that: this support zone is between two adjacent curved portions.

7. 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.

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

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

10. 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.

11. a support member is 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, and 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.

12. support member as claimed in claim 11 is characterized in that: this support zone is between two adjacent curved portions.

13. support member as claimed in claim 11 is characterized in that: this support member is by transparent or white material is made.

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