CN1538221A - Backlight component - Google Patents

Abstract

A backlight assembly includes an extruded metal carrier, a reflector, a light source set and a diffuser. The extruded metal carrier has a carrier top surface and a plurality of heat dissipation channels, the carrier top surface forms a containing groove, and the reflector plate is arranged in the containing groove. The light source group is arranged in the containing groove and positioned above the reflecting sheet, and the diffusion plate is arranged above the light source group. The extruded metal carrier can maintain the integral flatness of the backlight assembly and can conduct the heat of the light source group to the outside; the diffusion plate is prevented from deforming and sinking due to high temperature, so as to increase the brightness quality of the backlight assembly.

Description

Backlight component

(1) Technical field

The present invention relates to a backlight module, and in particular to a backlight module using an extruded metal carrier capable of dissipating heat and having a high structural flatness as a bazel.

(2) Background technology

With the rapid progress of liquid crystal display (liquid crystal display, LCD) production technology, and its advantages of thinness, lightness, power saving and radiation-free, liquid crystal displays are widely used in personal digital assistants (personal digital assistants, PDAs) ), notebook computers, digital cameras, digital camcorders, mobile phones, computer screens and LCD TVs and other electronic products. Coupled with the industry's active investment in research and development and the adoption of large-scale production equipment, the quality of liquid crystal displays has been continuously improved, and the price has been continuously reduced, so that the application fields of liquid crystal displays have rapidly expanded. However, since the liquid crystal display panel in the liquid crystal display is a non-self-illuminating display panel, it needs the light provided by the backlight assembly to produce the display function.

Please refer to FIG. 1A , which is a partial cross-sectional view of a conventional backlight assembly. In FIG. 1A, the backlight assembly 10 includes a frame (bazel) 11, a reflector sheet (reflector sheet) 12, a light source group composed of several cold cathode fluorescent lamps (cold cathode fluorescent lamp, CCFL) 13, and a diffuser plate. (diffuser plate)14. An accommodating groove 11a is formed on the top surface of the frame 11, and the reflection sheet 12 is disposed on the groove bottom 11b and the two groove walls 11c of the accommodating groove 11a in an adhesive manner. These cold cathode tubes 13 are arranged in the containing groove 11 a and located above the reflection sheet 12 . Wherein, the diffusion plate 14 is disposed above the cold cathode tubes 13 .

Since the material of the frame 11 is usually aluminum alloy, it is completed by a sheet metal stamping die forming method. However, as the backlight assembly 10 tends to be large in size, the cost of the mold will increase, and the frame 11 is easily deformed and dented due to the increase in size, as shown in FIG. 1B , which greatly affects the overall flatness of the backlight assembly 10 . In addition, in FIG. 1B , since the frame 11 cannot effectively conduct the heat generated by the cold cathode tubes 13 to the outside, the brightness of the backlight assembly 10 decreases, and the diffusion plate 14 is easily deformed and dented due to high temperature.

(3) Contents of the invention

In view of this, the object of the present invention is to provide a backlight assembly. It is designed with an extruded metal carrier as the frame. On the one hand, it can maintain the overall flatness of the backlight assembly and avoid deformation and depression of the frame of the backlight assembly due to the increase in size; on the other hand, it can conduct the heat generated inside the backlight assembly to the Outside, avoid the deformation and depression of the diffusion plate due to high temperature, so as to increase the luminance quality of the backlight assembly.

To achieve the above object of the present invention, a backlight assembly according to one aspect of the present invention includes an extruded metal carrier and a light source group. The extruded metal carrier has a carrier top surface and several cooling channels, and the carrier top surface forms a containing groove. Wherein, the light source group is arranged in the accommodating groove.

To achieve the above object of the present invention, a backlight assembly according to another aspect of the present invention includes an extruded metal carrier and a light source group. The extruded metal carrier has a bottom body and two side bodies, and the bottom body has a top surface of the body and several first cooling channels. The two side bodies are arranged on both ends of the top surface of the body, and enclose a receiving groove with the bottom body. The two sides of the main body have several second cooling channels, and the light source group is arranged in the accommodating groove.

In order to achieve the above object of the present invention, a backlight assembly according to yet another aspect of the present invention includes an aluminum rectangular carrier, reflectors, several cold cathode tubes and a diffuser plate. The aluminum rectangular carrier has a carrier top surface and several heat dissipation channels. The carrier top surface forms a containing groove, and the reflector is arranged in the containing groove. These cold-cathode tubes are arranged in the accommodating tank and located above the reflecting sheet, and the diffusion plate is arranged above the cold-cathode tubes.

In order to further illustrate the above-mentioned purpose, structural features and effects of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings.

(4) Description of drawings

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

FIG. 1B is a cross-sectional view of a state in which the frame and diffuser plate in FIG. 1A are deformed.

FIG. 2 is a partial cross-sectional view of a backlight assembly according to Embodiment 1 of the present invention.

FIG. 3 is a partial cross-sectional view of a backlight assembly according to Embodiment 2 of the present invention.

(5) specific implementation

Embodiment one

Please refer to FIG. 2 , which is a partial cross-sectional view of a backlight module according to Embodiment 1 of the present invention. In FIG. 2 , the backlight assembly 20 at least includes an extruded metal carrier 21 , a reflector sheet (reflector sheet) 22 , a light source group 23 and a diffuser plate (diffuser plate) 24 . The extruded metal carrier 21 has a carrier top surface 21a and several cooling channels 21b, and the carrier top surface 21a forms a receiving groove 21c. Wherein, the extruded metal carrier 21 is, for example, an aluminum rectangular carrier. In addition, the reflective sheet 22 is disposed in the containing groove 21c. For example, the reflective sheet 22 is formed on the bottom 21d and the two walls 21e of the accommodating groove 21c by pasting or coating.

The light source group 23 is disposed in the accommodating groove 21 c and located above the reflection sheet 22 . The light source group 23 is, for example, several cold cathode fluorescent lamps (CCFL). These cold cathode fluorescent lamps are arranged in the accommodating groove 21 c and located above the reflector 22 . In addition, the diffusion plate 24 is disposed above the light source group 23 . For example, both ends of the diffuser plate 24 are located on the carrier surface 21a, and the diffuser plate 24 can seal the opening of the upper end of the accommodating groove 21c.

Embodiment two

Please refer to FIG. 3 , which is a partial cross-sectional view of a backlight assembly according to Embodiment 2 of the present invention. In FIG. 3 , the backlight assembly 30 at least includes an extruded metal carrier 31 , a reflector 32 , a light source group 33 and a diffusion plate 34 . The extruded metal carrier 31 has a bottom body 31a and two side bodies 31b. The bottom body 31a has a body top surface 31c and a plurality of first cooling channels 31d. The two side bodies 31b are disposed on both ends of the top surface 31c of the body, and form a receiving groove 31e with the bottom body 31a. The two side bodies 31b have a plurality of second cooling channels 31f.

It should be noted that the two side bodies 31b are disposed on both ends of the top surface 31c of the body in a manner of being screwed to the bottom body 31a. For example, the present invention utilizes several screws 35 to assemble the bottom body 31 a and the two side bodies 31 b into an extruded metal carrier 31 . Wherein, the extruded metal carrier 31 is, for example, an aluminum rectangular carrier.

In addition, the reflective sheet 32 is disposed in the containing groove 31e. For example, the reflection sheet 32 is formed on the top surface 31c of the main body in the accommodating groove 31e and the two groove walls 31h of the accommodating groove 31e by pasting or coating.

The light source group 33 is disposed in the accommodating groove 31 e and located above the reflection sheet 32 . The light source group 33 is, for example, several cold cathode tubes, and these cold cathode tubes are arranged in the accommodating groove 31 e and located above the reflection sheet 32 . In addition, the diffusion plate 34 is disposed above the light source group 33 . For example, both ends of the diffuser plate 34 are located on the top surfaces of the two side bodies 31b, and the diffuser plate 34 can seal the opening of the upper end of the accommodating groove 31e.

The backlight assembly disclosed in the above embodiments of the present invention, because the extruded metal carrier is completed by extrusion molding, has high structural strength and is not easily deformed, and is very suitable for large-scale backlight assemblies to maintain the stability of the backlight assembly. Structural flatness. In addition, it is easier to design complex components with an extruded metal carrier, and the manufacturing cost is also much lower. In addition, the extruded metal carrier can conduct the heat generated by the light source group to the outside more quickly, avoiding the deformation and depression of the diffusion plate due to high temperature, so as to increase the luminance quality of the backlight assembly.

Although the present invention has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, and it should be understood that various changes and modifications can be made in the present invention. It does not deviate from the present invention in a broad sense, so it is not intended as a limitation to the present invention. As long as it is within the spirit of the present invention, changes and modifications to the above-mentioned embodiments will fall within the scope of the claims of the present invention.

Claims (16)

1. backlight assembly comprises at least:

One extrudes the type metallic carrier, has a carrier end face and several heat dissipation channels, and this carrier end face forms a storage tank; And

One light sources is disposed in this storage tank.

2. backlight assembly as claimed in claim 1, it is characterized in that this extrudes the type metallic carrier and also has a bottom body and dual side-edge body, this bottom body has a body end face, and this dual side-edge body is to be disposed on the two ends of this body end face, and surrounds this storage tank with this bottom body.

3. backlight assembly as claimed in claim 2 is characterized in that this dual side-edge body is to be disposed on the two ends of this body end face in the mode that is spirally connected with this bottom body.

4. backlight assembly as claimed in claim 1 is characterized in that this extrudes the type metallic carrier is an aluminium square type carrier.

5. backlight assembly as claimed in claim 1 is characterized in that this light sources is several cold-cathode tubes, and these cold-cathode tubes are to be arranged in this storage tank.

6. backlight assembly as claimed in claim 1 is characterized in that this backlight assembly also comprises:

One reflector plate is to be disposed in this storage tank, and is positioned at the below of this light sources.

7. backlight assembly as claimed in claim 1 is characterized in that this backlight assembly also comprises:

One diffuser plate is the top that is disposed at this light sources.

8. backlight assembly comprises at least:

One extrudes the type metallic carrier, have a bottom body and dual side-edge body, this bottom body has a body end face and several first heat dissipation channels, this dual side-edge body is to be disposed on the two ends of this body end face, and surrounding a storage tank with this bottom body, this dual side-edge body has several second heat dissipation channels; And

One light sources is to be disposed in this storage tank.

9. backlight assembly as claimed in claim 8 is characterized in that this dual side-edge body is to be disposed on the two ends of this body end face in the mode that is spirally connected with this bottom body.

10. backlight assembly as claimed in claim 8 is characterized in that this extrudes the type metallic carrier is an aluminium square type carrier.

11. backlight assembly as claimed in claim 8 is characterized in that this light sources is several cold-cathode tubes, these cold-cathode tubes are to be arranged in this storage tank.

12. backlight assembly as claimed in claim 8 is characterized in that this backlight assembly also comprises:

One reflector plate is to be disposed in this storage tank, and is positioned at the below of this light sources.

13. backlight assembly as claimed in claim 8 is characterized in that this backlight assembly also comprises:

One diffuser plate is the top that is disposed at this light sources.

14. a backlight assembly comprises at least:

One aluminium square type carrier has a carrier end face and several heat dissipation channels, and this carrier end face forms a storage tank;

One reflector plate is to be disposed in this storage tank;

Several cold-cathode tubes are to be arranged in this storage tank, and are positioned at the top of this reflector plate; And

One diffuser plate is the top that is disposed at these cold-cathode tubes.

15. backlight assembly as claimed in claim 14, it is characterized in that this aluminium square type carrier also has a bottom body and dual side-edge body, this bottom body has a body end face, and this dual side-edge body is to be disposed on the two ends of this body end face, and surrounds this storage tank with this bottom body.

16. backlight assembly as claimed in claim 15 is characterized in that this dual side-edge body is to be disposed on the two ends of this body end face in the mode that is spirally connected with this bottom body.

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