CN201739960U

Movatterモバイル変換

Info

Publication number: CN201739960U
Application number: CN2010202586378U
Authority: CN
Inventors: 布蓝登·R·尼尔
Original assignee: Solid State Opto Ltd
Current assignee: Solid State Opto Ltd
Priority date: 2010-07-13
Filing date: 2010-07-13
Publication date: 2011-02-09
Anticipated expiration: 2020-07-13

Abstract

The utility model relates to a light guide part and a backlight module adopting the same. The light guide part comprises a light guide plate, a flexible optical membrane and a bonding glue layer, wherein the light guide plate is curved and is provided with a light entrance surface, a convex arc-shaped light exiting surface and a concave arc-shaped light exiting surface which corresponds to the convex arc-shaped light exiting surface; the flexible optical membrane is provided with a plurality of optical micro-structures; the bonding glue layer is used for the flexible optical film to be fixedly bonded with the light guide plate; the bonding glue layer is between the flexible optical membrane and one surface out of the convex arc-shaped light exiting surface and the concave arc-shaped light exiting surface; and the bonding glue layer and the light guide plate have the same refractive index. The light guide part and the backlight module adopting the same have the benefits that the optical micro-structures can be provided on the light guide plate as the user does not need to consider the conditions such as shape, material and the like of the light guide plate, or the manufacturing of the optical micro-structures by utilizing more complex process or equipment.

Description

Light guide and adopt the backlight module of this light guide

Technical field

The utility model relates to a kind of backlight module, relates in particular to the structure of light guide in this backlight module.

Background technology

LGP tool one incidence surface of the prior art and an exiting surface.Incidence surface is positioned at the side surface that side, exiting surface that LGP can present its thickness are positioned at LGP.The leaded light mode of LGP is that light source is positioned over incidence surface, makes the light of light source be imported in the LGP from incidence surface.In addition, a side surface of LGP has optical microstructures.After light entered LGP, under the effect by optical microstructures, light reflects in LGP, and was luminous by exiting surface.

Yet, because the optical microstructures of LGP need be considered conditions such as its external form or material on making, otherwise, on making, optical microstructures will cause the damage of LGP.Therefore, the optical microstructures of LGP still has some restrictions on making needs to break through.

Summary of the invention

The utility model technical issues that need to address have provided a kind of light guide, are intended to solve the above problems;

The utility model also provides the backlight module that adopts above-mentioned light guide.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

Light guide of the present utility model comprises: a LGP; Described LGP is bending; This LGP has an one of incidence surface, a convex arc shaped exiting surface and relative this convex arc shaped exiting surface concave arc shape exiting surface; One flexible optical film; Described flexible optical film has a plurality of optical microstructures; And one fix the bonding glue-line of this flexible optical film on this LGP in order to stick together; Described bonding glue-line is between this convex arc shaped exiting surface and this concave arc shape exiting surface one of them and this flexible optical film; This bonding glue-line has identical refractive index with this LGP;

Backlight module of the present utility model comprises: above-mentioned light guide; And one in order to the light source of throw light to this LGP; Described surface of light source is to this incidence surface in this LGP.

Compared with prior art, the beneficial effects of the utility model are: the user does not need to consider condition such as type or material outside the LGP, perhaps needs more complicated technology or equipment to reach the making of optical microstructures, and optical microstructures can be provided on LGP.

Description of drawings

Figure 1A is the exploded view of the utility model light guide under an embodiment.

Figure 1B is the profile of Figure 1A alonghatching 1B-1B.

Fig. 2 is the profile of the utility model light guide under another embodiment.

Fig. 3 is that the LGP of the utility model light guide is wavy schematic diagram.

Fig. 4 A to Fig. 4 D is the schematic diagram of optical microstructures under different embodiment of the flexible optical film of the utility model light guide.

Fig. 5 is the schematic diagram of the utility model backlight module under an embodiment.

Fig. 6 is the profile of the utility model light guide under another embodiment.

The profile that Fig. 7 is the utility model light guide under an embodiment again.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail:

The utility model discloses a kind of light guide and adopts the backlight module of this light guide, is being on the LGP of bending in order to optical microstructures to be provided.

The utility model discloses a kind of light guide and adopts the backlight module of this light guide, is being on the LGP of bending in order to area source to be provided.

This kind light guide comprises a LGP, a flexible optical film and is binded glue-line.LGP is bending, has an incidence surface, one of relative a convex arc shaped exiting surface and a concave arc shape exiting surface.Flexible optical film has a plurality of optical microstructures.Bind glue-line and be positioned between convex arc shaped exiting surface and concave arc shape exiting surface one of them and the flexible optical film, in order to stick together fixedly flexible optical film on LGP.Bind glue-line in addition and have identical refractive index with LGP.

Among one of the utility model embodiment, LGP is C font, U font or waveform.

Among another embodiment of the utility model, these a little optical microstructures be arranged on flexible optical film two corresponding surfaces one of them.

Among the another embodiment of the present utility model, these a little optical microstructures are a plurality of protuberances or recess.These a little optical microstructures are a plurality of printing points or lens.

Among the another embodiment of the present utility model, flexible optical film is a flexible base plate.

Among the another embodiment of the present utility model, light guide more comprises a reflecting layer, and the reflecting layer is positioned at flexible optical film back to LGP simultaneously.The reflecting layer is a reflector plate or a reverberation coating.

Among the another embodiment of the present utility model, light guide more comprises a reflecting layer, and LGP is between reflecting layer and flexible optical film.The reflecting layer is a reflector plate or a reverberation coating.

Among the another embodiment of the present utility model, this kind backlight module comprises an above-mentioned light guide and a light source.Surface of light source is to the incidence surface of LGP, in order to throw light to LGP.

So, can on LGP, provide optical microstructures by light guide of the present utility model.The user does not need the condition of considering that type or material etc. can't be made optical microstructures outside the LGP, the making that perhaps needs extra more complicated technology or machinery equipment to finish optical microstructures.Also because the user does not need the condition of considering that type or material etc. can't be made optical microstructures outside the LGP, therefore, the selection of LGP also can be carried out towards the direction of large tracts of land size.

See also shown in Figure 1A and Figure 1B, the utility model provides a kind of light guide 100.Lightguide 100 comprises a LGP 200, a flexibleoptical film 300 and is binded glue-line 400.This LGP 200 is bending, has relative front and reverse side, and around its positive more than reverse side a side, wherein the area of front or reverse side is all greater than the area of a side wherein.The front of LGP 200 is non-planar (as curved surface, wavy surface etc.), has a convex arc shaped exiting surface 210.The reverse side of LGP 200 is non-planar (as curved surface, wavy surface etc.), has a concave arc shape exiting surface 220.Any side all can be one in order to being guided into theincidence surface 230 that light enters LGP 200, and sends light from convex arc shapedexiting surface 210 and concave arcshape exiting surface 220, so that two-way area source to be provided.

This flexibleoptical film 300 is crooked movably to cooperate the radian of LGP 200.In addition, relative first 310 and second 320 of this flexibleoptical film 300 tools two.These flexibleoptical film 300 one of them masks have a plurality of optical microstructures 330.Bind glue-line 400 tool light-permeables, configurable between LGP 200 and flexible optical film 300.In addition, bind glue-line 400 and have identical it (light) refractive index with LGP 200.

So, has identical it (light) refractive index owing to bind glue-line 400 with LGP 200, but bind glue-line 400 except entity fix this flexibleoptical film 300 on this LGP 200, more can provide light to travel to and fro between between flexibleoptical film 300 and the LGP 200.

Among one of the utility model embodiment, crooked movably the radian (Figure 1B) of this flexibleoptical film 300 with the concave arcshape exiting surface 220 that cooperates LGP 200.Bind glue-line 400 tool light-permeables, configurable between the concave arcshape exiting surface 220 and flexibleoptical film 300 of LGP 200, fix this flexibleoptical film 300 on the concave arcshape exiting surface 220 of LGP 200 to stick together.

See also shown in Figure 2ly, Fig. 2 is the profile of the utility model light guide under another embodiment.Among another embodiment of the utility model, crooked movably the radian (Fig. 2) of this flexibleoptical film 300 with the convex arc shapedexiting surface 210 that cooperates LGP 200.Bind glue-line 400 tool light-permeables, configurable between the convex arc shapedexiting surface 210 and flexibleoptical film 300 of LGP 200.

Among the another embodiment of the utility model, LGP 200 for example can be C font or U font (as Fig. 1).

See also shown in Figure 3ly, Fig. 3 is that theLGP 200 of the utilitymodel light guide 100 is wavy schematic diagram.But LGP 200 is undulate (as Fig. 3) for example, makes LGP 200 fronts, reverse side all have a convex globoidal 240 and a cancave camberedsurface 260.

See you later shown in Figure 1A, Figure 1B, among another embodiment of the utility model, LGP 200 is the transparent plastic material, for example can be polymethyl methacrylate (polymethyl methacrylate, PMMA), polystyrene (polystyrene, PS), Merlon (polycarbonate, PC), PET (polyethylene Terephthalate, PET), pi (polyimide) or common other material of being known of skill person.The research staff can be selected the material of LGP according to actual demand or restriction.

See you later shown in Figure 1A, Figure 1B, among the another embodiment of the utility model, flexibleoptical film 300 for example can be a flexible base plate, for example flexible circuit base board (flexible printed circuit board, material FPC).In addition, the material of flexibleoptical film 300 for example can be PET (polyethylene Terephthalate, PET) or usually other material of being known of skill person.In addition, flexibleoptical film 300 is thin (about 0.25mm) considerably, so be disposed on the LGP 200 after helping bending.The research staff can be selected the material of flexibleoptical film 300 according to actual demand or restriction.

In the example that one of above-mentioned two embodiment can change, these a littleoptical microstructures 330 for example can be arranged at flexibleoptical film 300 in the face of concave arcshape exiting surface 220 or convex arc shapedexiting surface 210 one side, as first 310 (shown in Figure 1A).Perhaps, these a littleoptical microstructures 330 for example can be arranged at flexibleoptical film 300 back to concave arc shape exiting surface 220 (Figure 1B) or convex arc shaped exiting surface 210 (Fig. 2) one side, i.e. second 320 (shown in Figure 1B).Or, two-sided this a littleoptical microstructures 330 that all can be provided with of flexible optical film 300.The research staff can be selected the position that is provided with of optical microstructures according to actual demand or restriction.

It should be noted that, see also shown in Fig. 4 A to Fig. 4 D that Fig. 4 A to Fig. 4 D is the schematic diagram ofoptical microstructures 330 under different embodiment of the flexibleoptical film 300 of the utility model light guide 100.The utility model does not limit the form of optical microstructures, can be a plurality of protuberances (as the triangularpyramidal protuberance 332 of the spherical protuberance 331 of Fig. 4 A, Fig. 4 B or zigzag protuberance or the like) or a plurality of depressed part (as the triangular pyramidaldepressed part 334 of the bulb-shaped recess portion 333 of Fig. 4 C, Fig. 4 D or zigzag depressed part or the like) so that light is produced more refraction or reflection, and luminous more equably.The research staff can be adjusted according to actual demand or restriction.And in these a littleoptical microstructures 330 distance between wantonly two protuberances (or depressed part) or arbitrary protuberance (or depressed part) height (or degree of depth) do not limited.

See you later shown in Figure 1A, Figure 1B, in the example that another of this two embodiment can change, these a littleoptical microstructures 330 also can be evenly or are distributed in unevenly on the flexibleoptical film 300; Or can plural mode of arranging be arranged on the flexibleoptical film 300 parallel or non-parallelly.The research staff can be selected the arrangement mode of optical microstructures according to actual demand or restriction.

In the another example that changes of this two embodiment, these a littleoptical microstructures 330 can be taken shape on the flexibleoptical film 300 by modes such as printing, machining, etching or plating respectively.So, these a littleoptical microstructures 330 can be respectively printing or coat printing points on the flexibleoptical film 300 or structure is outstanding or recessed lens.The research staff can be selected the production method and the concrete kind of optical microstructures according to actual demand or restriction.

Among the another embodiment of the utility model, bonding glue-line 400 is the sizing materials by tool resin material (for example silica gel or UV glue), through coating or print concave arc shape exiting surface 220 (Figure 1B) or convex arc shaped exiting surface 210 (Fig. 2), so that cemented flexibleoptical film 300 to LGP 200.Wherein bind glue-line 400 and be transparent or translucent at least.

See also shown in Figure 5ly, Fig. 5 is that the utility model backlight module is in the following schematic diagram of an embodiment.Among the another embodiment of the utility model, light guide more comprises a reflecting layer 500.Reflecting layer 500 is positioned at flexibleoptical film 300 back to concave arcshape exiting surface 220 one side, promptly second 320, returns in the LGP 200 and luminous in order to the light of reflection by flexibleoptical film 300.

See also shown in Figure 6ly, Fig. 6 is the profile of the utilitymodel light guide 100 under anotherembodiment.Light guide 100 more comprises a reflecting layer 500.Reflecting layer 500 is positioned at flexibleoptical film 300 back to convex arc shapedexiting surface 210 simultaneously, promptly second 320.

In the various embodiments described above, this reflectinglayer 500 for example can be reflector plate or reverberation coating.In addition, reflectinglayer 500 is preferable is white in color or the color of preferable reflecting effect such as silver color.The research staff can select to use reflectinglayer 500 according to actual demand or restriction.See also shown in Figure 7, the profile that Fig. 7 is the utility model light guide under an embodiment again.Among the embodiment again of the utility model,light guide 100 more comprises a reflecting layer 500.When flexibleoptical film 300 was positioned on the concave arcshape exiting surface 220 of LGP 200, reflectinglayer 500 was positioned at the convex arc shapedexiting surface 210 of LGP 200, makes LGP 200 between reflectinglayer 500 and flexible optical film 300.When light is directed back LGP 200 from flexibleoptical film 300, and when convex arc shapedexiting surface 210 sent, reflectinglayer 500 oppositely reflexed to light concave arcshape exiting surface 220, and is emitted beam by flexibleoptical film 300.

Otherwise other embodiment also discloses when flexible optical film is positioned at the convex arc shaped exiting surface of LGP, and LGP is (not shown) between reflecting layer and flexible optical film.

Consult shown in Figure 5ly again, the utility model provides a kind ofbacklight module 700 inaddition.Backlight module 700 comprises an above-mentionedlight guide 100 and a light source 600.Thislight source 600 for example is CCFL (Cold Cathode Fluorescent Lamp, CCFL, not shown) or light emitting diode 610 (light-emitting diode, LED), roughly be positioned at theincidence surface 230 of LGP 200, and throw light is to LGP 200.When thelight source 600 of the utility model is made up of one or morelight emitting diode 610 assemblies, can possess that volume is little, advantage such as long service life and power saving.So, after the light oflight source 600 enters LGP 200, light can through bind glue-line 400 by this a littleoptical microstructures 330 reflect or bounce back LGP 200 in, and carry out bright dipping by convex arc shapedexiting surface 210.

Fig. 5 is an example with thelight guide 100 that flexibleoptical film 300 is positioned at concave arcshape exiting surface 220 only, yet, the utility model is not limited to this, and thelight guide 100 of the utilitymodel backlight module 700 also can be applicable to the embodiment that flexibleoptical film 300 is positioned at convex arc shapedexiting surface 210.

Among the another embodiment of the utility model, one of them of above-mentioned thiskind backlight module 700 can be applicable in the electronic installation.The electronic installation of the utility model be not limited to mobile phone, video camera, camera, game machine, wrist-watch, music player, display screen, digital frame and lighting apparatus one of them.

In sum, the utility model light guide can produce suitably flexible characteristic by flexible optical film, make flexible optical film pliability ground cooperate the cancave cambered surface of LGP with optical microstructures, and then fixedly flexible optical film on the cancave cambered surface of LGP, be considered as LGP the one side.So, by the light guide of the utility model, the user does not need to consider condition such as type or material outside the LGP, perhaps needs more complicated technology or equipment to reach the making of optical microstructures, and optical microstructures can be provided on LGP.

The utility model discloses among as above each embodiment; be not in order to limit the utility model; anyly have the knack of this skill; in the spirit and scope that do not break away from the utility model; when can doing various changes and retouching, so the protection domain of the utility model is as the criterion when looking the scope that appended claim protects.

Claims

1. a light guide comprises: a LGP; It is characterized in that: described LGP is bending; This LGP has an one of incidence surface, a convex arc shaped exiting surface and relative this convex arc shaped exiting surface concave arc shape exiting surface; One flexible optical film; Described flexible optical film has a plurality of optical microstructures; And one fix the bonding glue-line of this flexible optical film on this LGP in order to stick together; Described bonding glue-line is between this convex arc shaped exiting surface and this concave arc shape exiting surface one of them and this flexible optical film; This bonding glue-line has identical refractive index with this LGP.

2. light guide according to claim 1 is characterized in that: this LGP is C font, U font or waveform.

3. light guide according to claim 1 is characterized in that: those optical microstructures be arranged on this flexible optical film two corresponding surfaces one of them.

4. light guide according to claim 1 is characterized in that: those optical microstructures are a plurality of protuberances or recess.

5. light guide according to claim 1 is characterized in that: those optical microstructures are a plurality of printing points or lens.

6. light guide according to claim 1 is characterized in that: this flexible optical film is a flexible base plate.

7. light guide according to claim 1 is characterized in that: also comprise a reflecting layer; This reflecting layer is positioned at this flexible optical film back to one of this LGP arcuation exiting surface.

8. light guide according to claim 1 is characterized in that: also comprise a reflecting layer; This LGP is between this reflecting layer and this flexible optical film.

9. according to claim 7 or 8 described light guides, it is characterized in that: this reflecting layer is a reflector plate or a reverberation coating.

10. backlight module is characterized in that comprising: just like one of them described light guide of claim 1 to 9 and in order to the light source of throw light to this LGP; Described surface of light source is to this incidence surface in this LGP.