CN201247363Y

CN201247363Y - Backlight module unit

Info

Publication number: CN201247363Y
Application number: CNU2008201099480U
Authority: CN
Inventors: 马彪
Original assignee: Beijing BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Priority date: 2008-08-22
Filing date: 2008-08-22
Publication date: 2009-05-27
Anticipated expiration: 2018-08-22

Abstract

The utility model provides a backlight module, wherein the backlight module comprises a plurality of light guide plates and a plurality of backlights which are arranged on the side surfaces of the light guide plates, the backlight module is formed from jointing a plurality of the light guide plates which are provided with the backlights, grooves are respectively arranged on one sides of the light guide plates, the backlights are arranged in the grooves, grid point printings are arranged on the bottom surfaces of the light guide plates, wherein the light guide plates comprise light incident surfaces and light emitting surfaces, expect for the light incident surfaces and the light emitting surfaces of a plurality of the light guide plates, the other surfaces are all glued with reflecting film, optical film materials are arranged on the light emitting surfaces of a plurality of the light guide plates, and the optical film materials comprise diffusion film, prism film and brightening film. The device is jointed into a whole through a plurality of the light guide plates whose side surfaces are provided with the backlights, which prevents the forming difficulties of the light guide plates with big dimension, improves the brightness of backlight module, and the optical film materials are arranged on the light guide plates, which enables light emitted form the light guide plates to be more uniform.

Description

Module backlight

Technical field

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

Background technology

Along with the development of liquid crystal technology, LCD has obtained widespread usage in computing machine, field of mobile phones, and is also developing rapidly in the growth in the application in TV, measurement demonstration field.Because display panels itself does not have the characteristics of luminescence, therefore, must add a backlight on display panels, just can reach display effect.Backlight mainly partly is made up of light source, light guide plate, optical film sheet and plastic cement frame etc.According to distribution of light sources position difference, be divided into side-light type and straight-down negative.As the backlight of liquid crystal display, in order to ensure the quality of display frame, it should have brightness height, luminous even, performances such as light angle is big, adjustable, high-level efficiency, low-power consumption, the life-span is long, light and approach.Therefore, backlight is the key components and parts in the liquid crystal indicator.

The module backlight of prior art as shown in Figure 1, this installs mainly by light guide plate 1, backlight 2, reflectance coating 3, optical film material 4 is formed.Wherein, this light guide plate 1 comprises an incidence surface 14, one exiting surfaces 11, and its lap all pastes reflectance coating 3, and optical film material 4 is a diffusion barrier.The light that backlight 2 sends is injected light guide plate from incidence surface 14, the transmission direction of light guide plate 1 guiding light, and then light penetrates from exiting surface 11.Light guide plate 1 can be to the transmission direction channeling conduct of optical fiber, and then improves the brightness and the homogeneity of area source.

Large-size light-conducting plate mainly is to make by ejection formation, and still, the size of light guide plate is big more, and ejection formation is difficult more, and in follow-up work light guide plate cutting, also difficulty relatively when light guide plate is cutd open the printing of light and site.Exploitation large scale ejection formation and all the other equipment also need higher cost.And,, when light source only is arranged at the side of light guide plate, very difficult and consistent near the light guide plate briliancy partly of the side that is provided with light source away from the light guide plate briliancy partly of the side that is provided with light source because the light guide plate size is bigger.Thereby cause the brightness of area source lower, homogeneity is relatively poor, can't satisfy large scale moulding demand.

In addition, when light source only is arranged at the side of light guide plate, at present in direct-light-type backlight the Region control technology of widespread usage be difficult to realize, cause the contrast of picture to be greatly enhanced, reduced the effect that picture shows.

The utility model content

The purpose of this utility model provides a kind of module backlight, effectively solves the not defective of easy-formation, processing, printing of existing large-size light-conducting plate, and has solved the luminous homogeneity defect of bad of large-size light-conducting plate.

For achieving the above object, the utility model provides a kind of module backlight, and described module backlight comprises a plurality of light guide plate and a plurality of backlight that is arranged at described light guide plate side, and described module backlight is spliced by a plurality of described light guide plate that are provided with described backlight; Each described light guide plate one side has been cut groove, and described backlight places described groove; Described bottom surface of light guide plate has net-point printing; Described light guide plate comprises incidence surface and exiting surface, and described light guide plate its lap except that described incidence surface and described exiting surface all posts reflectance coating; Above the described exiting surface of the described a plurality of light guide plate that are spliced, be placed with optical film material; Described optical film material comprises diffusion barrier, prism film, brightness enhancement film.

The utility model provides a kind of module backlight, the a plurality of light guide plate that are provided with backlight by a side are stitched together, avoided the difficult forming of large-size light-conducting plate, and post reflectance coating at its lap that removes light guide plate incidence surface and exiting surface, improved the brightness of module backlight, also light guide plate is provided with optical film material and makes the light that penetrates from light guide plate more even.

Below by specific embodiment, and in conjunction with the accompanying drawings the utility model is described in further detail.

Description of drawings

The schematic perspective view of Fig. 1 prior art module backlight;

Fig. 2 is the local schematic layout pattern of the utility model module backlight;

Fig. 3 is the part sectioned view of the utility model module backlight.

Description of reference numerals:

The 1-light guide plate; The 2-backlight; The 3-reflectance coating;

4-optical film material 11-exiting surface; The 12-bottom surface;

The 13-side; The 14-incidence surface; The 15-groove;

Embodiment

Fig. 2 is the local schematic layout pattern of the utility model module backlight, as Fig. 2, the utility model module backlight is spliced by a plurality of light guide plate 1, side in each light guide plate 1 is provided with backlight, the luminance brightness height that makes final outgoing, avoided the difficulty of moulding of large scale backlight and follow-up work, and made that the Region control technology is used in side-light type back light.

Fig. 3 is the part sectioned view of the utility model module backlight, as shown in Figure 3, the utility model module backlight comprises light guide plate 1, backlight 2, reflectance coating 3, light guide plate 1 comprises exiting surface 11, bottom surface 12, side 13 and incidence surface 14, a groove 15 is cut in a side 13 in light guide plate, and backlight 2 is placed in the grooves 15, makes another adjacent light guide plate of light directive and light guide plate 1, net-point printing is done in bottom surface 12 in light guide plate 1, makes from the light of incidence surface 14 incidents to penetrate from exiting surface 11 uniformly.All post reflectance coating 3 at its lap that removes light guide plate incidence surface 14 and exiting surface 11, make the light that enters light guide plate 1 can not penetrate air from other faces of light guide plate 1, finally penetrate from exiting surface 11, the optical film material 4 that exiting surface 11 tops are provided with, optical film material 4 comprises diffusion barrier, prism film, brightness enhancement film, can use wherein the combination of any one or two kinds, three kinds, brightness enhancement film is generally used the brightness enhancement film (DBEF) of polarization, through the mixed light once more of optical film material 4, obtain high brightness, uniform light.Backlight 2 can be light emitting diode (LED), also can be cold cathode fluorescent tube (CCFL), and the length of CCFL and quantity can be according to the length settings of the groove 15 of light guide plate 1, the shared CCFL of groove that also can a plurality of light guide plate arranged side by side.Be in backlight in the groove that the light guide plate of edge is provided with and be in the light guide plate that incides with its adjacency, the opposite face of its groove can post the backlight of injecting wherein, for this light guide plate provides light source.In addition, the reflectance coating 3 of splicing place of a plurality of light guide plate 1 as shown in Figure 2 can only keep one deck.

Because the utility model is provided with backlight in a side of each light guide plate, improved the brightness of module backlight, when having solved backlight and being arranged on large-size light-conducting plate one side, light is difficult to reach from backlight place far away, cause brightness not high, the problem of lack of homogeneity.

When the utility model module backlight is worked, the light that backlight from a light guide plate groove penetrates enters the incidence surface of adjacent light guide plate, through the site design of the bottom surface of the light guide plate that enters light and the effect of reflectance coating, incident or the light that reflexes to the bottom surface are reflected, the reflectance coating of side reflects incident or the light that reflexes to the side, the final exiting surface that penetrates through the mixed light once more of the optical film material on the exiting surface, obtains high brightness, uniform light.

The utility model provides a kind of module backlight, by backlight being set in each light guide plate side, all post reflectance coating at its lap that removes light guide plate incidence surface and exiting surface, again a plurality of light guide plate are stitched together, light guide plate is provided with optical film material, make from the luminance brightness height of light guide plate ejaculation, good uniformity, and make that the Region control technology is used in side-light type back light.

It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the spirit and scope of technical solutions of the utility model.

Claims

1, a kind of module backlight is characterized in that, described module backlight comprises a plurality of light guide plate and a plurality of backlight that is arranged at described light guide plate side, and described module backlight is spliced by a plurality of described light guide plate that are provided with described backlight.

2, module backlight according to claim 1 is characterized in that, each described light guide plate one side has been cut groove, and described backlight places described groove.

3, module backlight according to claim 2 is characterized in that, described bottom surface of light guide plate has net-point printing.

4, module backlight according to claim 2 is characterized in that, described light guide plate comprises incidence surface and exiting surface, and described light guide plate its lap except that described incidence surface and described exiting surface all posts reflectance coating.

5, according to the arbitrary described module backlight of claim 1-4, it is characterized in that, above the described exiting surface of the described a plurality of light guide plate that are spliced, be placed with optical film material.

6, backlight film group according to claim 5 is characterized in that, described optical film material comprises diffusion barrier, prism film, brightness enhancement film.