CN100487538C - Backlight assembly - Google Patents

Abstract

A backlight assembly, comprising: a back frame plate provided with at least one first fixing part; a light source arranged on the back frame plate; a diffusion plate disposed above the light source; and a spacing member disposed between the back frame plate and the diffusion plate and including a supporting portion supporting the diffusion plate to maintain a predetermined distance between the light source and the diffusion plate; and a base part, the base part is connected to the supporting part and is fixedly connected to the back frame plate; the supporting part is provided with a reflecting layer, and the reflecting layer is formed on the surface of the supporting part and used for reflecting the light of the light source; the base part comprises a hook part buckled on the back frame plate and an extension part, and the extension part is connected with the supporting part and the hook part and penetrates through the first fixing part; the at least one first fixing portion is used for fixing the base portion.

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

As shown in FIG. 1 , a backlight assembly 100 of a known liquid crystal display has a light source (a planar light source shown in the figure) 10 disposed on a back frame 20, and the light emitted by the light source 10 is diffused by a diffuser plate 30. presents a state of uniform distribution. However, to achieve the above effects, a predetermined distance H must be separated between the diffuser plate 30 and the light source 10 so that the light emitted from the light source 10 can be evenly mixed.

However, the diffusion plate 30 is prone to deform and sag due to the influence of its own weight or the heat emitted by the light source 10, so that the distance H between the diffusion plate 30 and the light source 10 is difficult to maintain the predetermined value. Therefore, between the diffusion plate 30 and the light source 10 It is necessary to design a member that can maintain the distance between the diffuser plate 30 and the light source 10 .

For example, Japanese Patent Laying-Open No. 10-326517 discloses a conical spacer (spacer) for a backlight assembly. The conical spacer maintains the distance between the cylindrical lamp tube and the diffuser plate. The spacer is made of transparent or white material to avoid uneven brightness.

In addition, Japanese Patent Application Laid-Open No. 2001-210126 discloses a fixing device for fluorescent tubes of a backlight assembly. In addition to protecting the tubes, the fixing device can also maintain the distance between the tubes and maintain the distance between the tubes and the tubes. Distance between diffuser plates.

The present invention intends to provide another design of spacer members with different structures to support the diffuser plate, which can prevent the diffuser plate from deforming and maintain the distance between the diffuser plate and the light source.

Contents of the invention

In view of this, the object of the present invention is to provide a spacer that can prevent the diffusion plate from deforming and maintain the distance between the diffusion plate and the light source.

Another object of the present invention is to provide a backlight assembly using the above spacer.

In order to achieve the above object, the present invention provides a backlight assembly, which includes: a back frame plate provided with at least one first fixing portion; a light source arranged on the back frame plate; a light source arranged above the light source and a spacer member, which is arranged between the back frame plate and the diffuser plate, and includes a support portion, which supports the diffuser plate, so that the light source and the diffuser plate maintain a predetermined Distance, and a base, the base is connected to the support, and fixed on the back frame; wherein, the support has a reflective layer, the reflective layer is formed on the surface of the support, used to reflect the light source light; the above-mentioned at least one first fixing part is used to fix the above-mentioned base part.

In the backlight assembly of the present invention, the base portion includes a hook portion fastened to the back frame, and an extension portion, the extension portion connects the supporting portion and the hook portion, and passes through the first fixing portion.

In the backlight assembly of the present invention, the above-mentioned light source can be a planar light source.

In the backlight assembly of the present invention, the support portion includes a strip-shaped first support member extending along a first direction parallel to the diffuser plate, and the first support member has a contact portion contacting the diffuser plate , and at least one side, which is connected to the contact portion and forms a predetermined angle with the diffusion plate; the above-mentioned reflective layer is formed on the side.

In the backlight assembly of the present invention, the supporting part further includes a second supporting part extending along a second direction, and the structure of the second supporting part is the same as that of the first supporting part.

In the backlight assembly of the present invention, the back frame is provided with at least one first fixing portion for fixing the above-mentioned base, and the light source is provided with at least one second fixing portion, and the second fixing portion corresponds to the above-mentioned first fixing portion. A fixing part is used to fix the base.

In the backlight assembly of the present invention, the first fixing portion may include a first engaging hole, and the extension portion passes through the first engaging hole. The second fixing portion may include a second engaging hole coincident with the first engaging hole, and the extending portion passes through the first and second engaging holes.

In the backlight assembly of the present invention, the first engaging portion may include a first engaging groove extending along the first direction, and the extending portion passes through the first engaging groove. The second fixing part may include a second engaging groove coincident with the first engaging groove, and the extension part passes through the first and second engaging grooves.

The present invention uses the spacer with the above structure to maintain an appropriate distance between the light source and the diffusion plate, avoiding the uneven brightness caused by the deformation and sagging of the diffusion plate due to heat, and also enabling the diffusion plate to exert a better effect.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a cross-sectional view of a conventional backlight assembly.

FIG. 2 is a perspective view of the backlight assembly of the present invention.

Fig. 3 is a sectional view along line A-A of Fig. 2 .

Fig. 4 is a front view of a spacer member of the present invention.

Fig. 5 is a perspective view of another embodiment of the present invention.

Fig. 6 is a perspective view of another embodiment of the present invention.

FIG. 7 is a partially enlarged cross-sectional view of FIG. 6 .

Fig. 8 is an exploded cross-sectional view of the spacer member shown in Fig. 7 .

Fig. 9a is an exploded perspective view of the spacing member shown in Fig. 7 .

Fig. 9b is an exploded perspective view of another spacing member.

Explanation of reference symbols:

10～light source; 20～back frame plate; 30～diffusion plate; 100, 200～backlight assembly; 1000～plane light source; 1010～second engaging groove; 2000～back frame plate; 2010～first engaging groove; 3000 ～diffuser; 5000～spacer; 5010～support; 5012～shoulder; 5020～extension; 5030～hook; 5040～top; 6000, 7000, 7000'～spacer;

Detailed ways

In this embodiment, the present invention is described in detail by taking a backlight assembly with a planar light source as an example.

FIG. 2 is a perspective view of the backlight assembly of the present invention. Fig. 3 is a sectional view along line A-A of Fig. 2 . Fig. 4 is a front view of a spacer member of the present invention.

As shown in Figure 2, the planar light source 1000 is arranged on the back frame plate 2000 of the backlight assembly, and a strip-shaped spacer member 5000 extends along the x direction and is arranged between the planar light source 1000 and the diffusion plate 3000, and the top of the spacer member 5000 A contact portion 5040 can be formed to contact the diffuser plate 3000 , thereby maintaining a predetermined distance between the planar light source 1000 and the diffuser plate 3000 .

As shown in FIG. 3 , three first engaging grooves 2010 are provided on the back frame board 2000 , and three second engaging grooves 1010 are provided on the planar light source 1000 , respectively overlapping with the above three first engaging grooves 2010 . The structure of the spacing member 5000 is shown in FIG. 4 , including a support portion 5010 , an extension portion 5020 and a hook portion 5030 . Returning to Figure 3, the hook part 5030 has two engaging hooks that are reversely buckled on the back frame plate 2000 from the outside; the extension part 5020 is two rib-shaped pieces, used to connect the supporting part 5010 and the two engaging hooks, and extend Through the first engaging groove 2010 and the second engaging groove 1010, a shoulder 5012 is formed at the junction of the support portion 5010 and the extension portion 5020, and the shoulder 5012 abuts against the edge of the second engaging groove 1010, so the hook While the part 5030 is fastened to the back frame plate 2000, the shoulder 5012 abuts against the planar light source 1000, so that the spacer member 5000 is fixed between the planar light source 1000 and the diffusion plate 3000, and the height of the supporting part 5101 is approximately equal to that of the planar light source 1000. The distance from the diffuser plate 3000 enables the contact portion 5040 to abut against the diffuser plate 3000 to achieve a supporting effect.

In addition to the spacer member 5000 extending along the x direction, another spacer member (not shown) can also be provided to extend in the y direction to form a cross-shaped or cross-shaped support structure with the spacer member 5000 to strengthen the support effect and make the diffusion plate 3000 It is less likely to sag and deform.

In addition, reflective layers can be formed on both sides of the support portion 5010 to reflect the light emitted by the planar light source 1000, so as to avoid uneven brightness caused by setting spacers; the reflective layers can be made of metal or other high-reflectivity materials. matter formed. The included angle between the two side surfaces is approximately 20°-60°.

In addition to the setting of the above-mentioned first and second engaging grooves 2010 and 1010, the above-mentioned first and second engaging grooves can also be changed to a plurality of first and second engaging holes. Of course, the extension part 5020 and the hook The shape of the portion 5030 also needs to be correspondingly changed to a columnar structure.

As shown in FIG. 5 , a plurality of conical spacing members 6000 are disposed on the planar light source 1000 . As such, the spacer member 6000 can be made of transparent or reflective material. The supporting portion and the extending portion (not shown) of the spacer member 6000 are columnar.

FIG. 6 shows another embodiment of the present invention, a plurality of spacer members 7000 are arranged between each planar light source 1000 . FIG. 7 shows a cross-sectional view of a spacer member 7000 disposed between planar light sources 1000 . The spacing member 7000 is fixed between the planar light sources 1000 by bolts 8000 , and FIG. 8 and FIG. 9 a show exploded views of the spacing member 7000 and the bolts 8000 . Another spacer member 7000' having a larger diameter may also be used (as shown in Figure 9b).

In this embodiment, a planar light source is taken as an example for illustration, but the supporting structure of the present invention can also be applied to a backlight assembly using a cylindrical lamp tube, and the supporting structure of the present invention can achieve a better supporting effect than the conventional technology.

The present invention uses the spacer with the above structure to maintain an appropriate distance between the light source and the diffusion plate, avoiding the uneven brightness caused by the deformation and sagging of the diffusion plate due to heat, and also enabling the diffusion plate to exert a better effect. In addition, the spacing member of the present invention is strip-shaped, which can achieve a better supporting effect than the known technology.

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

Claims (10)

1. A backlight assembly, comprising: a back frame plate provided with at least one first fixing portion; a light source arranged on the back frame; a diffuser plate disposed above the light source; and a spacer member, the spacer member is arranged between the back frame plate and the diffuser plate, and includes a support portion, the support portion supports the diffuser plate, keeps a predetermined distance between the light source and the diffuser plate, and a base , the base is connected to the supporting portion, and fixed on the back frame; Wherein, the supporting part has a reflective layer formed on the surface of the supporting part for reflecting the light of the light source; The above-mentioned at least one first fixing portion is penetrated to fix the above-mentioned base portion. 2. The backlight assembly according to claim 1, wherein the base portion comprises a hook portion fastened to the back frame, and an extension portion, the extension portion connects the supporting portion and the hook portion, and passes through the first fixing part. 3 . The backlight assembly as claimed in claim 2 , wherein the supporting portion comprises a long strip-shaped first supporting member, and the first supporting member extends along a first direction parallel to the diffuser plate. 4 . 4. The backlight assembly according to claim 3, wherein the first supporting member has a contact portion, the contact portion is in contact with the diffusion plate; at least one side, the side is connected to the contact portion, and is connected to the The diffusion plate is at a predetermined angle; wherein the reflective layer is formed on the side surface. 5. The backlight assembly according to claim 4, characterized in that: the supporting part further comprises a long strip-shaped second supporting member, the second supporting member extends along a second direction, and the structure of the second supporting member Same as the first support. 6. The backlight assembly as claimed in claim 2 or 3, wherein the first fixing portion comprises a first engaging hole, and the extending portion passes through the first engaging hole. 7. The backlight assembly according to claim 3, wherein the first fixing portion comprises a first engaging groove, the first engaging groove extends along the first direction, and the extending portion penetrates through the first engaging groove. snap into the slot. 8. The backlight assembly according to claim 2, wherein the light source is a planar light source and is provided with at least one second fixing portion, the second fixing portion corresponds to the first fixing portion, and is used to fix the base . 9. The backlight assembly according to claim 8, wherein the second fixing portion comprises a second engaging hole coincident with the first engaging hole, and the extending portion passes through the first and second engaging holes. in the hole. 10. The backlight assembly according to claim 8, wherein the second fixing portion comprises a second engaging groove coincident with the first engaging groove, and the extending portion penetrates through the first and second engaging grooves. In the groove.

Images