CN201487723U

CN201487723U - Backlight module and liquid crystal display device

Info

Publication number: CN201487723U
Application number: CN200920173437XU
Authority: CN
Inventors: 刘卫东; 乔明胜; 郑颖博
Original assignee: Qingdao Hisense Electronics Co Ltd
Current assignee: Qingdao Hisense Electronics Co Ltd
Priority date: 2009-08-25
Filing date: 2009-08-25
Publication date: 2010-05-26
Anticipated expiration: 2019-08-25

Abstract

The embodiment of the utility model discloses a backlight module which comprises a back plate; a plurality of LEDs (light-emitting diodes) are attached onto the back plate; a diffusion plate, a diffusion film, a light collecting piece and a light intensifying piece are sequentially arranged above the back plate from the bottom up; an enclosed optical cavity is formed between the back plate and the diffusion plate; LEDs adopt side-emitting structures; and light reflecting ridges are arranged on the back plate and between the LEDs.

Description

Module backlight and liquid crystal display device

Technical field

The utility model relates to technical field of liquid crystal display, particularly a kind of module backlight and liquid crystal display device.

Background technology

Module backlight is one of key components and parts of display panels, because liquid crystal itself is not luminous, therefore need supply light source by module backlight, so that liquid crystal panel can provide normal and even brightness image.The light source that is applied to module backlight has cold-cathode fluorescence lamp CCFL and LED.Wherein, because LED has characteristics such as high-durability, the life-span is long, light and handy, power consumption is low, be a kind of desirable lighting source.Especially under the surging gradually situation of present energy expenditure, LED more is subjected to the attention and the utilization of industrial circle, is used to replace other bigger light-emitting component of power consumption in the past.

As shown in Figure 1, the structural principle of existing module backlight is: backboard 11 is provided with reflector plate 12, backboard 11 and a plurality of LED13 that have been sticked above the reflector plate 12, above described backboard 11, reflector plate 12 and LED13, be disposed with diffuser plate 14, first diffusion barrier 15, light-collecting piece 16, second diffusion barrier 17 and brightening piece 18 from bottom to top, form the optics cavity 10 of a sealing between described backboard 11 and the diffuser plate 14.As shown in Figure 2, described LED13 is the straight-down negative structure, the light that LED13 upwards launches reflects in the optics cavity 10 of blooming piece that diffuser plate 14, first diffusion barrier 15, light-collecting piece 16, second diffusion barrier 17 and brightening piece 18 are formed and reflector plate 12 formation, finally beat on liquid crystal display, guarantee that display panels can provide normal and even brightness image.

In realizing process of the present utility model, the inventor finds that there are the following problems at least in the prior art:

Because backlight LED is the straight-down negative structure, the light that LED launches need reflect between diffuser plate and the reflector plate in back plate surface, and therefore, the mixed light interval of backlight is bigger, causes the thickness of entire aphototropism mould to increase.

The utility model content

Embodiment of the present utility model provides a kind of module backlight and liquid crystal display device, can reduce the mixed light interval of backlight, reduces the thickness of module backlight.

The technical scheme that the utility model embodiment adopts is:

A kind of module backlight, comprise backboard, a plurality of LED have been sticked on the described backboard, described backboard top is disposed with diffuser plate, diffusion barrier, light-collecting piece and brightening piece from bottom to top, form the optics cavity of a sealing between described backboard and the diffuser plate, wherein, described LED is the side ray structure, on the described backboard, be provided with reflection edge between the LED.

Wherein, described a plurality of LED are arrayed, are provided with reflection edge between the LED of described adjacent two row.

Further, the length of described reflection edge equals the length of described backboard.

Further, the height of described reflection edge is less than the distance between described backboard and the diffuser plate.

Wherein, the bottom surface of described reflection edge is positioned on the described backboard, and the longitudinal section of described reflection edge is a triangle.

A kind of liquid crystal display device, comprise: the module backlight that sets gradually from bottom to top, drive IC, liquid crystal display and preceding frame, described module backlight comprises backboard, a plurality of LED have been sticked on the described backboard, described backboard top is disposed with diffuser plate, diffusion barrier, light-collecting piece and brightening piece from bottom to top, forms the optics cavity of a sealing between described backboard and the diffuser plate, wherein, described LED is the side ray structure, on the described backboard, be provided with reflection edge between the LED.

The utility model embodiment module backlight and liquid crystal display device, on the described backboard, be provided with reflection edge between the LED, described LED is the side ray structure, the light that the LED side emission goes out at first passes through the reflection of reflection edge, just penetrate then by diffuser plate, thereby can reduce the mixed light interval of light between backboard and diffuser plate that backlight is launched, reduce the thickness of module backlight; In addition, the illuminated LED of side has easy buying, advantage that cost is low with respect to straight-down negative LED, thereby can shorten the construction cycle of module backlight, reduces the production cost of module backlight.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the cross section structure schematic diagram of module backlight in the prior art;

Fig. 2 is the backlight light-mixing structure schematic diagram of module backlight in the prior art;

The cross section structure schematic diagram of the module backlight that Fig. 3 provides for the utility model embodiment;

The backlight of the module backlight that Fig. 4 provides for the utility model embodiment and the positional structure schematic diagram of reflection edge;

The light-mixing structure schematic diagram of the module backlight that Fig. 5 provides for the utility model embodiment.

The specific embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making all other embodiment that obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

For the advantage that makes technical solutions of the utility model is clearer, the utility model is elaborated below in conjunction with drawings and Examples.

Embodiment of the present utility model provides a kind of module backlight, can reduce the mixed light interval of backlight, reduces the thickness of module backlight.

As shown in Figure 3, Figure 4, described module backlight comprises backboard 32, a plurality of LED33 have been sticked on the described backboard 31, described backboard 31 tops are disposed with diffuser plate 34, diffusion barrier 35, light-collecting piece 36 and brightening piece 37 from bottom to top, form the optics cavity 30 of a sealing between described backboard 31 and the diffuser plate 34, wherein, described LED33 is the side ray structure, on described backboard 31, be provided with reflection edge 32 between the LED33.

Wherein, described a plurality of LED33 are arrayed, are provided with reflection edge 32 between the LED33 of described adjacent two row.

Further, the length of described reflection edge 32 equals the length of described backboard 31.

Further, the height of described reflection edge 32 is less than the distance between described backboard 31 and the diffuser plate 34.

Wherein, the bottom surface of described reflection edge 32 is positioned on the described backboard 31, and the longitudinal section of described reflection edge 32 is a triangle.

As shown in Figure 5, the light that the illuminated LED33 side emission of described side goes out at first passes through the reflection of reflection edge 32, in the optics cavity 30 of blooming piece that diffuser plate 34, diffusion barrier 35, light-collecting piece 36 and brightening piece 37 are formed and reflection edge 32 formation, reflect then, finally beat on liquid crystal display, guarantee that display panels can provide normal and even brightness image;

Wherein, the reflectivity of described brightening piece 37 is near 50%, in the blooming piece of forming by diffuser plate 34, diffusion barrier 35, light-collecting piece 36 and brightening piece 37, the main albedo of light derives from brightening piece 37, light reflection more equably in optics cavity 30 that backlight LED 33 is launched improves the mixed light effect.

The module backlight that the utility model embodiment provides, on the described backboard, be provided with reflection edge between the LED, described LED is the side ray structure, the light that the LED side emission goes out at first passes through the reflection of reflection edge, just penetrate then by diffuser plate, thereby can reduce the mixed light interval of light between backboard and diffuser plate that backlight is launched, reduce the thickness of module backlight; In addition, the illuminated LED of side has easy buying, advantage that cost is low with respect to straight-down negative LED, thereby can shorten the construction cycle of module backlight, reduces the production cost of module backlight.

Embodiment of the present utility model also provides a kind of liquid crystal display device, can reduce the mixed light interval of backlight, reduces the thickness of module backlight.

Described liquid crystal display device, comprise: the module backlight that sets gradually from bottom to top, drive IC, liquid crystal display and preceding frame, described module backlight comprises backboard, a plurality of LED have been sticked on the described backboard, described backboard top is disposed with diffuser plate, diffusion barrier, light-collecting piece and brightening piece from bottom to top, forms the optics cavity of a sealing between described backboard and the diffuser plate, wherein, described LED is the side ray structure, on the described backboard, be provided with reflection edge between the LED.

Wherein, the structural principle of described module backlight can not repeat them here with reference to Fig. 3, Fig. 4 and shown in Figure 5.

The liquid crystal display device that the utility model embodiment provides, on the described backboard, be provided with reflection edge between the LED, described LED is the side ray structure, the light that the LED side emission goes out at first passes through the reflection of reflection edge, just penetrate then by diffuser plate, thereby can reduce the mixed light interval of light between backboard and diffuser plate that backlight is launched, reduce the thickness of module backlight; In addition, the illuminated LED of side has easy buying, advantage that cost is low with respect to straight-down negative LED, thereby can shorten the construction cycle of module backlight, reduces the production cost of module backlight.

The utility model is applicable to the module backlight with LED-backlit source, and the liquid crystal display device with this module backlight, but is not limited only to this.

The above; it only is the specific embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.

Claims

1. module backlight, comprise backboard, a plurality of LED have been sticked on the described backboard, described backboard top is disposed with diffuser plate, diffusion barrier, light-collecting piece and brightening piece from bottom to top, form the optics cavity of a sealing between described backboard and the diffuser plate, it is characterized in that described LED is the side ray structure, on the described backboard, be provided with reflection edge between the LED.

2. module backlight according to claim 1 is characterized in that, described a plurality of LED are arrayed, is provided with reflection edge between the LED of described adjacent two row.

3. module backlight according to claim 2 is characterized in that, the length of described reflection edge equals the length of described backboard.

4. module backlight according to claim 2 is characterized in that the height of described reflection edge is less than the distance between described backboard and the diffuser plate.

5. according to claim 3 or 4 described modules backlight, it is characterized in that the bottom surface of described reflection edge is positioned on the described backboard, and the longitudinal section of described reflection edge is a triangle.

6. liquid crystal display device, comprise: the module backlight that sets gradually from bottom to top, drive IC, liquid crystal display and preceding frame, described module backlight comprises backboard, a plurality of LED have been sticked on the described backboard, described backboard top is disposed with diffuser plate, diffusion barrier, light-collecting piece and brightening piece from bottom to top, forms the optics cavity of a sealing between described backboard and the diffuser plate, it is characterized in that, described LED is the side ray structure, on the described backboard, be provided with reflection edge between the LED.

7. liquid crystal display device according to claim 6 is characterized in that, described a plurality of LED are arrayed, is provided with reflection edge between the LED of described adjacent two row.

8. liquid crystal display device according to claim 7 is characterized in that, the length of described reflection edge equals the length of described backboard.

9. liquid crystal display device according to claim 7 is characterized in that the height of described reflection edge is less than the distance between described backboard and the diffuser plate.

10. according to Claim 8 or 9 described liquid crystal display devices, it is characterized in that the bottom surface of described reflection edge is positioned on the described backboard, and the longitudinal section of described reflection edge is a triangle.