CN101986020B

CN101986020B - Method for eliminating color difference of overlapped backlight modules

Info

Publication number: CN101986020B
Application number: CN2009100555875A
Authority: CN
Inventors: 蔡宗霖; 苏东权; 锺胜如; 洪聪永
Original assignee: SUZHOU XIANGLONG PLASTIC CO Ltd
Current assignee: Suzhou Global Lighting Technologies Inc.
Priority date: 2009-07-29
Filing date: 2009-07-29
Publication date: 2012-04-18
Anticipated expiration: 2029-07-29
Also published as: CN101986020A

Abstract

The invention relates to a method for eliminating color difference of overlapped backlight modules, wherein, at least one first light guide plate and at least one second light guide plate are overlapped with each other and respectively provided with a light outgoing surface; the first light guide plate and the second light guide plate are independently equipped with light sources which can emit light into the respective light guide plate; the other surfaces of the first light guide plate and the second light guide plate, which are opposite to the light outgoing surfaces, are equipped with a first reflective sheet and a second reflective sheet respectively for reflecting light; the first reflective sheet in an overlapping area is equipped with a plurality of holes; and the light entering the second light guide plate is mixed with the light in the first light guide plate via the holes so as to get out of the light outgoing surface of the first light guide plate. The method has the beneficial effect that by adopting the structure by which the light in one light guide plate can properly enter the other light guide plate, the two types of light which enter the light guide plates are mixed to reach a gradient mixing ratio, thus realizing conversion from one luminance or chrominance to the other luminance or chrominance so as to generate smooth visual effect.

Description

Eliminate the method for bridging type backlight module aberration

Technical field

The present invention relates to a kind of can be applied to such as LCD TV, computing machine, mobile phone ... etc. make displays be the backlight module of light-emitting device, relate in particular to a kind of method of bridging type backlight module.

Background technology

For some electronic products, whether its operation-interface can be luminous except relating to illuminating effect, also is related to the surcharge of aspects such as visual appearance, texture.Said operation-interface with illumination effect; Usually include a backlight module; The structure of this backlight module mainly includes a LGP and at least one light source, and LGP then comprises an exiting surface and at least one incidence surface, and the bottom surface relative with exiting surface is usually as incidence surface; Maybe can be with the side of LGP as incidence surface, and light source is set in this incidence surface; The front of the LGP blooming pieces such as brightening piece, diffusion sheet that can be sticked in regular turn by actual needs.The side-light type LGP that generally is used; Promptly at least one side at LGP is provided with light source; LGP then is provided with reflector plate usually with respect to the bottom surface of exiting surface, is recycled to rearrange in the LGP with the light reflection that will overflow LGP and utilizes, and prevent the backlight module light leak; Light through brightening piece and diffusion sheet is derived by predetermined visual angle or direction, to present good brilliant degree and uniformity coefficient.Said light source can be light emitting diode (LED, light emitting diode) or cold-cathode tube (CCFL); Because the advantage of little, the little power consumption of volume, long service life, be used in the existing trend that replaces CCFL gradually by LED of light source of backlight module.

Because the consumer is more and more fastidious to the appearance and modeling of product, causes manufacturer also more and more to pay attention to the aesthetics of product design; Some product is based on the factor in the moulding, its need produce illumination effect the position can therefore complications, provide the backlight module of illumination effect also must to cooperate thereupon along with said moulding; Because the LGP in the backlight module all is a plane formula, if when needing to cooperate tortuous product-forming, promptly must be with the combination of LGP overlap joint, and light source is provided at LGP separately, to launch light into LGP.

Bridging type backlight module in the prior art shown in Fig. 1 and Figure 1A; End at two LGP A and B is provided with a light source A1 and a B1 respectively, and this two light sources A1 and B1 get into light transmission in the LGP and produce illumination effect at exiting surface toward the length direction projection of two LGPs respectively; But the lap position of this two LGPs A and B can have the notable difference on briliancy and the colourity with other zone of LGP because gross thickness increases, and can cause the uneven situation of light and shade in the C zone, causes visual poor effect.

Summary of the invention

The technical issues that need to address of the present invention have provided a kind of method of eliminating bridging type backlight module aberration, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the present invention realizes through following steps:

At least two first LGP and second LGPs that overlap and have respectively an exiting surface each other are provided, and this first LGP and second LGP independently are provided with respectively and can launch light into the interior light source of LGP separately; This first LGP and second LGP are respectively equipped with respect to the another side of its exiting surface and are used for first reflector plate and second reflector plate of reflection ray; First reflector plate in this overlap joint zone is provided with plural hole; Said hole makes light and the interior light mixed light of first LGP of injecting second LGP, and then shows from the exiting surface of first LGP.

Compared with prior art; The invention has the beneficial effects as follows: because the structure that can the light in the LGP suitably be got into another LGP is set; Make two kinds of light mixed lights that get in this LGP reach the mixing ratio of gradual change; And then by a kind of briliancy or chroma conversion to another kind of briliancy or colourity, produce submissive visual effect.

Description of drawings

Fig. 1 is for showing the schematic top plan view of bridging type backlight modular structure in the prior art.

Figure 1A is the partial enlarged drawing of the 1A part of Fig. 1.

Fig. 2 is for showing the schematic top plan view of the present invention with two LGP overlap joints.

Fig. 2 A is the partial enlarged drawing of the 2A part of Fig. 2.

Fig. 3 is the forward sight floor map of displayed map 2.

Embodiment

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

The objective of the invention is to solve the LGP of bridging type backlight module in the prior art, there is notable difference in the briliancy in its overlap joint zone and colourity meeting and other zone that does not overlap of LGP, so that influence the problem of the comfortableness of visual effect.

Characteristic of the present invention; It is lap position at two LGPs of backlight module; The structure that can the light in the LGP suitably be got into another LGP is set; Make two kinds of light mixed lights that get in this LGP reach the mixing ratio of gradual change, so by a kind of briliancy or chroma conversion to another kind of briliancy or colourity, produce submissive visual effect.

A the present invention wherein technological means is to comprise at least two first LGP and second LGPs of overlap joint each other; This first LGP and second LGP independently are provided with respectively and can launch light into the interior light source of LGP separately; And this first LGP and second LGP are respectively equipped with respect to the another side of its exiting surface and are used for first reflector plate and second reflector plate of reflection ray; Wherein, First reflector plate in this overlap joint zone is provided with plural hole, make inject second LGP light through these holes and with first LGP in the light mixed light, and then demonstrate soft briliancy and colourity more uniformly from the exiting surface of first LGP.

Another technological means of the present invention; Can be on the basis of aforementioned techniques means; In the exiting surface setting of first LGP and second LGP such as blooming pieces such as brightening piece, diffusion sheets; And further the blooming piece in this two LGPs overlap joint zone is provided with the through hole of plural number corresponding to the hole position of reflector plate; Make the light of injecting second LGP through those holes and through hole and with first LGP in the light mixed light, and then demonstrate soft, uniform briliancy and colourity from the exiting surface of first LGP.

As a kind of selection, the said plural hole of being located at the lap position of first reflector plate, its diameter can be all identical, and also can part identical, part be inequality, or the diameter of each hole is all inequality.

Select as another kind, the said plural hole shape of being located at the lap position of first reflector plate can be various suitable geometric configuratioies or irregularly shaped such as circle, triangle, square, rectangle, rhombus, polygon.

Select as another, the said plural hole of being located at the lap position of first reflector plate can be regularly arranged, also can be irregular alignment.

Select as another, the said through hole of being located at blooming piece, its aperture or size can be identical or inequality with the hole size on the reflector plate.

Select as another, the said through hole of being located at blooming piece, its shape can be identical or inequality with the hole shape on the reflector plate.

Visible by Fig. 2 to Fig. 3: present embodiment is to do explanation with the overlap joint of two LGPs, but in fact can do the three layers of overlap joint or the overlap joint of multilayer more according to the actual needs of product; No matter overlap, must have the position relation that is positioned at upper strata and lower floor with several layers, or the position at the place ahead and rear relation; At present embodiment is to do explanation with the position relation of upper strata and lower floor.LGP with the bilayer overlap joint of Fig. 2 to Fig. 3 is an example, is to comprise one first LGP 1 and one second LGP 2 that an end phase mutual connection connects, and first LGP 1 is positioned at the upper strata, and second LGP 2 is positioned at lower floor; The bottom surface of first LGP 1 and second LGP 2 is respectively equipped with first reflector plate 11 and second reflector plate 21, and exiting surface setting such as the brightening piece of visual actual demand above two LGPs, diffusion sheet ... wait blooming piece 13 and 23.One distolateral limit of first LGP 1 and second LGP 2 then is respectively provided to few one first light source 12 and at least one secondary light source 22; Said light source preferably adopts light emitting diode (LED), in order to can dwindle the volume of whole backlight module; First light source 12 conducts light respectively with secondary light source 22 in the end projection entering LGP of first LGP 1 and second LGP 2; By first reflector plate 11 and second reflector plate 21 light is reflected respectively again, and then penetrate to produce luminous visual effect by the exiting surface of first LGP 1 and second LGP 2.

When the present invention connects two LGPs overlap joint; Be with first LGP, 1 one ends following directly be stacked over second LGP, 2 one ends above; That is the exiting surface of following and second LGP 2 of first reflector plate 11 or blooming piece 23 overlapping contacts, thereby in first LGP 1 and the common overlap joint zone of second LGP, 2 formation.Characteristic of the present invention; Be plural hole 111 to be set at the first regional reflector plate 11 of said overlap joint; Make light that light source 22 injects second LGP 2 except can be directly showing from the exiting surface of second LGP 2; Part light can also pass blooming piece 23 back and get into first LGPs 1 through those holes 111, and then and the light injected in first LGP 1 by light source 12 form mixed light, the exiting surface from first LGP 1 shows again.In addition, the present invention can also be provided with a plurality of through holes 231 corresponding to those hole 111 positions at the blooming piece 23 in overlap joint zone, to increase the light quantity that gets in first LGP 1.By aforesaid structure, so that two kinds of light mixed lights that get in first LGP 1 reached the mixing ratio of gradual change, make its by a kind of briliancy or chroma conversion to another kind of briliancy or colourity, produce submissive visual effect, promote visual comfortableness.

The aforementioned hole 111 of being located at first reflector plate 11 can for example, can make the diameter of these holes 111 all identical according to light quantity its pore size of design or the shape that will let light pass through; Also can make the diameter part of these holes 111 identical, and part is inequality; Or the diameter of these holes 111 is all inequality.The shape of those holes 111 then can be circle, triangle, square, microscler side, rhombus, polygon ... any suitable geometric configuration also can be irregularly shaped.Even those holes 111 can be regularly arranged, also can be irregular alignment.Pore size or the shape of being located at the through hole 231 on the blooming piece 23 can be identical with the pore size of said hole 111, also can be inequality.

The above is merely in order to explain the present invention's preferred embodiment; Be not that the attempt tool is to do any formal restriction to the present invention; Be with, all have in following any modification or change of doing relevant the present invention of identical invention spirit, all must be included in the protection category of the present invention.

Claims

1. method of eliminating bridging type backlight module aberration; At least two first LGP and second LGPs that overlap and have respectively an exiting surface each other are provided, and this first LGP and second LGP independently are provided with respectively and can launch light into the interior light source of LGP separately; This first LGP and second LGP are respectively equipped with respect to the another side of its exiting surface and are used for first reflector plate and second reflector plate of reflection ray; It is characterized in that: first reflector plate in the overlap joint zone is provided with plural hole; Said hole makes light and the interior light mixed light of first LGP of injecting second LGP, and then shows from the exiting surface of first LGP.

2. the method for elimination bridging type backlight module aberration according to claim 1, it is characterized in that: the pore size of those holes is all identical.

3. the method for elimination bridging type backlight module aberration according to claim 1 is characterized in that: the pore size part of those holes is identical, and part is inequality.

4. the method for elimination bridging type backlight module aberration according to claim 1, it is characterized in that: the pore size of those holes is all inequality.

5. according to the method for 1 to 4 each described elimination bridging type backlight module aberration of claim the, it is characterized in that: those holes are for circular.

6. according to the method for 1 to 4 each described elimination bridging type backlight module aberration of claim the, it is characterized in that: those holes are triangle.

7. according to the method for 1 to 4 each described elimination bridging type backlight module aberration of claim the, it is characterized in that: those holes are square.

8. according to the method for 1 to 4 each described elimination bridging type backlight module aberration of claim the, it is characterized in that: those holes are rectangle.

9. according to the method for 1 to 4 each described elimination bridging type backlight module aberration of claim the, it is characterized in that: those holes are rhombus.