CN101749666A

CN101749666A - Light source layout structure of backlight module

Info

Publication number: CN101749666A
Application number: CN200810204138A
Authority: CN
Inventors: 蔡宗霖; 钟胜如; 苏东权; 林育政; 黄文彦; 吕逸杰
Original assignee: Solid State Opto Ltd
Current assignee: Solid State Opto Ltd
Priority date: 2008-12-05
Filing date: 2008-12-05
Publication date: 2010-06-23
Anticipated expiration: 2028-12-05
Also published as: CN101749666B

Abstract

The invention relates to a light source layout structure of a backlight module, which is mainly characterized in that two opposite sides of a light guide plate are respectively provided with a plurality of light sources, and the light sources on the two sides are in a mutually staggered distribution so as to ensure that light rays projected into the light guide plate can distribute more uniformly during conducting in the light guide plate; and the light sources can be arranged on the side edges of the light guide plate and can also be arranged inside the light guide plate and keeps a distance from the side edges, and moreover, included angles can be positioned between the light ray projection directions of the light sources positioned on one side of the light guide plate and the light sources on the other side, all of which can achieve the purpose of uniform luminescence of the light guide plate.

Description

The light source layout structure of backlight module

Technical field

The present invention relates to a kind of backlight module, relate in particular to a kind of light source layout structure of backlight module.

Background technology

The application of backlight module is very general, as mobile computer, display, mobile phone, LCD TV ... wait the not irradiative electronic equipment of display itself all to need backlight module that light source is provided.

General backlight module includes LGP and light source, for the electronic product that the body thickness requirement approaches, typically use LED as light source, and this light source is located at the side of LGP, first side of LGP then is provided with a reflector plate, second side surface opposite then is provided with the plural blooming piece of being made up of diffusion sheet and prismatic lens etc., and the periphery in those assemblies surrounds with a housing again.The light that light source sent is entered by the side projection of LGP, and part light is reflected by reflector plate, penetrates by diffusion sheet and prismatic lens in regular turn again.

For the less backlight module of size; because the area of LGP is less; so only need light source be installed in a side of LGP gets final product; but for larger-size backlight module, if light source only is installed in LGP one side, then the light that enters behind the LGP of projection can be decayed when being transmitted to opposite side gradually; cause the situation of the brightness irregularities of LGP; therefore, can light source all be installed in large-area LGP both sides usually, to improve the problem of aforementioned one-sided light source.

As seen from Figure 5: be the relative dual-side that a plurality of led light sources 2 is installed in a LGP 1 respectively, and the light source 2 of dual-side is symmetrical relatively, therefore, and during light source projects light, along being easy to generate the low problem of brightness between the light source of directions X, cause the brightness irregularities of whole LGP.

Summary of the invention

The technical issues that need to address of the present invention have provided a kind of light source layout structure of backlight module, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:

The present invention includes: a LGP, plural light source; Described plural light source is laid in the relative both sides of this LGP respectively, and the light source of these both sides is interspersed each other, so that the both sides projection of light from this LGP entered in the LGP.

Compared with prior art, the invention has the beneficial effects as follows: be that the light source that will be located at the LGP both sides changes its relative position, the light that allows projection enter in the LGP can be taken into account comprehensively, thereby reaches the purpose of brightness uniformity.

Description of drawings

Fig. 1 lays plural light source for demonstration the present invention respectively at the relative dual-side of LGP, and the first interlaced embodiment schematic diagram of this both sides light source.

Fig. 2 lays a plurality of light sources that lay respectively at relative both sides for demonstration the present invention in LGP, and the second interlaced embodiment schematic diagram of this both sides light source.

Fig. 3 lays a plurality of light sources that lay respectively at relative both sides for demonstration the present invention in LGP, and this LGP dual-side further is provided with the 3rd embodiment schematic diagram of optical texture.

Fig. 4 lays plural light source for showing the present invention respectively at the relative dual-side of LGP, and wherein the ray cast direction of the light source of the light source of a side and opposite side forms the 4th embodiment schematic diagram of an angle.

Fig. 5 is that light source is the schematic diagram that is laid in the relative both sides of LGP symmetrically for showing backlight module of the prior art.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:

Main purpose of the present invention is to solve the laying structure of the light source of aforementioned backlight module of the prior art at LGP, can cause the disappearance of brightness irregularities.

Principal character of the present invention is that the light source that will be located at the LGP both sides changes its relative position, and the light that allows projection enter in the LGP can be taken into account comprehensively, thereby reaches the purpose of brightness uniformity.

A wherein technological means of the present invention is the relative both sides of the edge that plural light source are laid in this LGP respectively, and the light source of these both sides is interspersed each other, so that the relative both sides projection of light from LGP entered in the LGP.

A technological means more of the present invention is that plural light source is laid in respectively in the relative both sides of this LGP, and has a distance with the relative both sides of the edge of this LGP, and the light source of these both sides is interspersed each other.

Another technological means of the present invention is to be located at LGP when inner at light source, can also be provided with in the relative both sides of the edge of LGP can reflection ray optical texture, to remedy the brightness between light source back and the LGP edge; Described optical texture can also can be located at the position at corresponding light source place, LGP both sides of the edge along whole distribution of lengths of these LGP both sides of the edge; Described optical texture can be formed by plural sawtooth, prominent point or concave point arrangement.

Another technological means of the present invention, be to be provided with light source at the LGP dual-side, wherein the ray cast direction of the light source of a side has an angle with the ray cast direction of the light source of relative opposite side, the distance that can remedy two adjacent light sources thus not simultaneously, the luminance difference that LGP produced.

Embodiment 1

Consult Fig. 1, the first embodiment of the present invention, be the relative both sides of the edge that plural light source 2 are laid in a LGP 1 respectively, and the light source 2 of these both sides is interspersed each other, so that the relative both sides projection of light from LGP entered in the LGP, lay mode thus, after ray cast enters LGP, can reach more extensive, average covering, thereby make LGP have more uniform brightness.

Embodiment 2

Consult Fig. 2, the second embodiment of the present invention, be that plural light source 2 is laid in respectively in the relative both sides of a LGP 1, and have one apart from S with the relative both sides of the edge of this LGP 1, and the light source 2 of these both sides is interspersed each other, therefore, the light source of a side can be with ray cast to relative opposite side, and constitutes the wider zone of a coverage.

Embodiment 3

Consult Fig. 3, the third embodiment of the present invention is the structure that follows aforementioned second embodiment, also is about in the relative both sides that plural light source 2 is laid in a LGP 1 respectively, and have one apart from S with the relative both sides of the edge of this LGP 1, and the light source 2 of these both sides is interspersed each other; But can also be provided with in the relative both sides of the edge of LGP 1 can reflection ray optical texture 11, make light source 2 be projected to a relative rear flank, can be by optical texture 11 with the light reflection, to remedy the deficiency that possibly can't directly be caused brightness between light source 2 back and LGP 1 edge by ray cast.Described optical texture 11 can also can be located at the position at corresponding light source 2 places, LGP both sides of the edge along whole distribution of lengths of LGP 1 both sides of the edge; Described optical texture can be formed by plural sawtooth, prominent point or concave point arrangement.At embodiment shown in Figure 3, this optical texture 11 is to be arranged by plural sawtooth to form, and only is arranged on the LGP edge of corresponding light source 2 rear positions.

Embodiment 4

Consult Fig. 4, the fourth embodiment of the present invention, be to be provided with plural light source 2 at LGP 1 dual-side, and the light source 2 of these both sides is interspersed each other, wherein the ray cast direction of the light source 2a of a side has an angle with the ray cast direction of the light source 2 of relative opposite side, the angle of inclination of this oblique light source 2a, and two distance between the light source 2a, can adjust according to actual needs, the distance that can remedy two adjacent light sources 2 thus is not simultaneously, the luminance difference that LGP produced reaches more extensive, average covering makes LGP have more uniform brightness.

The above only is in order to explain preferred embodiment of the present invention; be not that attempt is done any pro forma restriction to the present invention according to this; therefore, all have following of identical spirit do relevant any modification or change, all must be included in the scope that the invention is intended to protect.

Claims

1. the light source layout structure of a backlight module comprises: a LGP, plural light source; It is characterized in that: described plural light source is laid in the relative both sides of this LGP respectively, and the light source of these both sides is interspersed each other, so that the both sides projection of light from this LGP entered in the LGP.

2. the light source layout structure of backlight module according to claim 1, it is characterized in that: described light source is located at the both sides of the edge of this LGP.

3. the light source layout structure of backlight module according to claim 1, it is characterized in that: described light source is located in this LGP, and has a distance with the relative both sides of the edge of this LGP.

4. the light source layout structure of backlight module according to claim 3, it is characterized in that: the relative both sides of the edge of described LGP are provided with the optical texture of reflection ray.

5. the light source layout structure of backlight module according to claim 4, it is characterized in that: described optical texture is along whole distribution of lengths of these LGP both sides of the edge.

6. the light source layout structure of backlight module according to claim 4 is characterized in that: described optical texture is located at these LGP both sides of the edge to position that should the light source place.

7. according to the light source layout structure of claim 4 or 5 or 6 described backlight modules, it is characterized in that: described optical texture is to be arranged by plural sawtooth to form.

8. according to the light source layout structure of claim 4 or 5 or 6 described backlight modules, it is characterized in that: described optical texture is to be arranged by the prominent point of plural number to form.

9. according to the light source layout structure of claim 4 or 5 or 6 described backlight modules, it is characterized in that: described optical texture is to be arranged by plural concave point to form.

10. the light source layout structure of backlight module according to claim 1, it is characterized in that: the ray cast direction of the light source of this LGP one side has an angle with the ray cast direction of the light source of relative opposite side.