CN101936509A

CN101936509A - Backlight structure and production method thereof

Info

Publication number: CN101936509A
Application number: CN 201010293476
Authority: CN
Inventors: 赖清坤
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2010-09-20
Filing date: 2010-09-20
Publication date: 2011-01-05
Also published as: CN102434821A

Abstract

The invention provides a backlight structure and a production method thereof. The backlight structure comprises a light guide plate, a light emitting module and a reflector, wherein the light guide plate is provided with an incident side and an exit surface, and the exit surface is formed at one end edge of the incident side; the light emitting module comprises a substrate and a light emitting assembly which is arranged on the substrate and emits light towards the incident side; and the reflector is provided with a first reflection part and a second reflection part, wherein the first reflection part is arranged between the surface of the substrate and the incident side of the light guide plate, and the second reflection part extents outwards from the first reflection part to shield a part of the exit surface. By the invention, light leakage between the incident side of the light guide plate and the light emitting module is reduced, and the utilization rate of light energy can be enhanced further. In addition, optical glass can be used as the light guide plate so that an optical film attached to the light guide plate does not curl or deform easily.

Description

Backing structure and manufacture method thereof

[technical field]

The invention relates to a kind of backing structure and manufacture method thereof; Particularly, the invention relates to a kind of backing structure and manufacture method thereof with reflector, design by reflector and blooming applying glass LGP comes simultaneously the light inlet side of LGP and the light leak between the light emitting module and the Texturized of blooming are improved, to improve the efficiency of light energy utilization.

[background technology]

Because the liquid crystal molecule itself in the LCD can't be luminous, therefore need add the Presentation Function that light source is reached LCD.The general practice is to adopt the backlight module that is arranged at the display panels rear to be used as the light source of LCD.Backlight module mainly is made up of LGP and luminescence component, and the light that luminescence component sent via LGP conduction and equably directive display panels becomes display light source, and then reaches the liquid crystal display function.Common backlight module has sidelight (edge lighting) type and straight (bottom lighting) type Two kind down, and wherein the side light type backlight module is to the side emitting of LGP, and the Staight downward type backlight module is then to the bottom-emission of LGP.

And the light that luminescence component sent also can some spill under general situation except becoming display light source.Therefore, the common practice can be provided with reflector plate under the LGP in the side light type backlight module, or in the Staight downward type backlight module, reflector plate is arranged at the surface of lamp box bottom, using the light reflected back LGP that will spill from bottom surface of light guide plate becomes display light source.Yet except the light that spills from the LGP bottom surface, some light is after being produced by luminescence component, and directly the direction beyond the LGP penetrates and fails to enter LGP.

[summary of the invention]

The object of the present invention is to provide a kind of backing structure and manufacture method thereof, improve the light leak of LGP light inlet side, and then improve the efficiency of light energy utilization.

Backing structure of the present invention comprises LGP, light emitting module and reflector.LGP has light inlet side and exiting surface, and exiting surface is formed at an ora terminalis of light inlet side.Light emitting module comprises substrate and luminescence component, and the luminescence component that is arranged on the substrate is luminous towards the light inlet side.Reflector has first light-reflecting portion and second light-reflecting portion, and first light-reflecting portion of second light-reflecting portion between the light inlet side that is arranged at substrate surface and LGP extended and a part of covering exiting surface, makes reflector towards the LGP reflection light that luminescence component sent.

Backing structure manufacture method of the present invention comprises: LGP is provided.Setting comprises the light emitting module of substrate and luminescence component, makes the luminescence component that is arranged on the substrate can be luminous towards the light inlet side of LGP.Setting has the reflector of first light-reflecting portion and second light-reflecting portion, first light-reflecting portion of second light-reflecting portion between the light inlet side that is arranged at substrate surface and LGP extended and a part of covering the exiting surface that is formed at an ora terminalis of light inlet side, makes reflector towards the LGP reflection light that luminescence component sent.

The present invention improves the light leak of LGP light inlet side by reflector is set with the structure of utilizing reflector, uses the raising efficiency of light energy utilization.

[description of drawings]

Figure 1A is the schematic diagram of first embodiment of backing structure of the present invention;

Figure 1B is the exploded view of backing structure shown in Figure 1A;

Fig. 2 is the schematic diagram of another embodiment of the reflector of backing structure of the present invention;

Fig. 3 is the schematic diagram of an embodiment of the bottom surface of the LGP of backing structure of the present invention;

Fig. 4 is the schematic diagram of second embodiment of backing structure of the present invention;

Fig. 5 A is the flow chart of first embodiment of the manufacture method of backing structure of the present invention;

The flow chart of another embodiment of the step of LGP is provided in the manufacture method of Fig. 5 B for backing structure shown in Fig. 5 A; And

Fig. 6 is the flow chart of second embodiment of the manufacture method of backing structure of the present invention.

[primary clustering symbol description]

10 LGPs

11 light inlet sides

12 exiting surfaces

13 bottom surfaces

131 pattern-free zones

20 light emitting modules

21 substrates

211 surfaces

22 luminescence components

30 reflectors

31 first light-reflecting portion

311 recesses

312 perforations

32 second light-reflecting portion

40 reflector plates

41 first surfaces

42 second surfaces

50 glue-lines

60 supporting constructions

61 backboards

62 glue frames

70 bloomings

71 first bloomings

72 second bloomings

[specific embodiment]

The invention provides a kind of backing structure and manufacture method thereof.In preferred embodiment, backing structure of the present invention is applied in the flat-panel screens of LCD for example as the backlight film group.Yet in other embodiments, backing structure of the present invention also can be applicable in other device that needs back light.

Figure 1A is the schematic diagram of first embodiment of backing structure of the present invention; Figure 1B then be backing structure shown in Figure 1A exploded view.Shown in Figure 1A and Figure 1B, this backing structure comprises LGP 10, light emitting module 20, reflector 30, reflector plate (reflector) 40 and supporting construction 60.LGP 10 has light inlet side 11, exiting surface 12 and bottom surface 13.Exiting surface 12 is the surface of LGP 10 towards the top, and 13 of bottom surfaces are relative another surface towards LGP 10 belows.Light inlet side 11 is positioned on the sidewall of LGP 10, and exiting

surface

12 and 13 of bottom surfaces are formed at two relative ora terminalis of light inlet side 11 respectively, makes exiting surface 12 and bottom surface 13 accompany an angle with light inlet side 11 and adjoins each other.

Light emitting module 20 comprises substrate 21 and luminescence component 22, and the luminescence component 22 that is arranged on the substrate 21 is luminous towards light inlet side 11.Light emitting module 20 is preferably and adopts light emitting diode (light-emittingdiode is LED) as the striation (light bar) of luminescence component 22.In different embodiment, when being formed with optical microstructures on the bottom surface 13, can keeping bottom surface 13 and not form the optical microstructures (see figure 3) with respect to the part of luminescence component 22 avoiding the formation of bright spot (hot spot), and then improve the efficiency of light energy utilization.

Reflector 30 has first light-reflecting portion 31 and second light-reflecting portion 32.In the present embodiment, reflector 30 is a metal material; Yet in other embodiments, can be other materials such as plastics.First light-reflecting portion 31 is arranged between the light inlet side 11 of surface 211 on the substrate 21 of light emitting module 20 and

LGP

10,32 of second light-reflecting portion are extended and are crossed over the adjacent boundary of light inlet side 11 and exiting surface 12 toward the directions of LGP 10 from the plane, place of first light-reflecting portion 31, and then make second light-reflecting portion 32 be across exiting surface 12 tops and a part of covering exiting surface 12 edges, make entire emission cover 30 be able to the light that is sent towards LGP 10 reflection luminescence components 22.In the present embodiment, the section of first light-reflecting portion 31 and second light-reflecting portion forms L shaped.

In addition, in the present embodiment, first light-reflecting portion 31 fits with the surface 211 of light emitting module 20, and the side of its bottom is formed with recess 311 and passes for luminescence components 22.Yet in other embodiments, first light-reflecting portion 31 can keep a spacing with surface 211, and can pass for luminescence component 22 at the mid portion formation perforation 312 of first light-reflecting portion 31 as shown in Figure 2.The present invention improves the light inlet side 11 of LGP 10 and the light leak between the light emitting module 20 by reflector 30 is set with the structure of utilizing reflector 30, uses the raising efficiency of light energy utilization.

Reflector plate 40 fits in the bottom surface 13 of LGP 10 and reflects the light that luminescence components 22 are sent towards LGP 10, by the light reflected back LGP 10 that will spill from the bottom surface 13 of LGP 10, with the further raising efficiency of light energy utilization.In the present embodiment, reflector plate 40 interconnects by glue-line 50 with LGP 10, and the refractive index of its mesoglea 50 is preferably 1.0.Yet in other embodiments, can make reflector plate 40 directly and LGP 10 fit.

Supporting construction 60 supports assemblies such as tabula rasa 10, light emitting module 20, reflector 30 and reflector plate 40, and supporting construction 60 comprises backboard (back cover) 61 and glue frame 62.Reflector plate 40 has opposite first 41 and second surface 42, and first surface 41 fits in the bottom surface 13 of LGP 10 by glue-

line

50, and 42 of second surfaces fit in backboard 61 and glue frame 62.In preferred embodiment, for example can using, glue material such as double faced adhesive tape is bonding on reflector plate 40 on backboard 61 and the glue frame 62.Yet in other embodiments, can select not to be provided with reflector plate 40 and supporting construction 60, supporting construction 60 also can adopt different designs, for example adopts other material or structure to form supporting construction 60.

Fig. 3 is the schematic diagram of an embodiment of the bottom surface of the LGP of backing structure of the present invention.As shown in Figure 3, the bottom surface 13 of LGP 10 is pattern-free zone 131 near the part of luminescence component 22, and the other parts beyond the pattern-free zone 131 then are formed with optical microstructures.As previously mentioned, pattern-free zone 131 the formation that can avoid bright spot is set, and then improve the efficiency of light energy utilization.The preferable mode of printing of adopting of part that other of pattern-free zone 131 and bottom surface 13 has optical microstructures forms.Yet in other embodiments, can look the setting that demand is adjusted optical microstructures, for example on whole bottom surface 13, form optical microstructures or on bottom surface 13, do not form optical microstructures.In addition, the also visual demand of generation type of pattern-free zone 131 or optical microstructures adopts alternate manner.

Fig. 4 is the schematic diagram of second embodiment of backing structure of the present invention.As shown in Figure 4, except aforesaid LGP 10, light emitting module 20, reflector 30, reflector plate 40 and supporting construction 60, this backing structure more comprises the blooming 70 on the exiting surface 12 that fits in LGP 10.Preferable use glue material binds mutually between LGP 10 and the blooming 70, and LGP 10 is preferably optical flat, and its material can be the optical glass of soda-lime glass (soda glass), silex glass (silica glass), ultra-clear glasses (ultra clearglass) or other type.Compared to plastic materials such as acryl, the optical glass material has advantages such as good thermal conductivity and high structural strength, makes blooming 70 on the LGP 10 be attached at the optical glass material be not easy because stressed or be heated and Texturized.Yet in other embodiments, visual demand adopts the LGP 10 of other material.Blooming 70 can for for example brightness enhancement film (Brightness Enhancement Film, BEF), the blooming piece of diffusion barrier (diffuser film).In the present embodiment, blooming 70 comprises first blooming 71 and second blooming 72 of overlapping setting and applying mutually.Yet in other embodiments, the demand of can looking only is provided with a blooming piece as blooming 70, also can more blooming pieces of overlapping setting.In addition, also can adopt the multilayer complex films of the function of on a diaphragm, integrating several diaphragms as blooming 70.

Fig. 5 A is the flow chart of first embodiment of the manufacture method of backing structure of the present invention.Shown in Fig. 5 A, step 110 provides LGP, and this LGP has the light inlet side, be formed at the exiting surface of light inlet side edge and with respect to the bottom surface of exiting surface.LGP is preferably optical flat, and material is preferably the optical glass of soda-lime glass, silex glass, ultra-clear glasses or other type.In preferred embodiment, step 110 more comprises the bottom surface that reflector plate is fitted in LGP, to reflect the light that luminescence component was sent towards LGP.Wherein reflector plate and LGP are preferable interconnects (shown in Figure 1A) by glue-line, and the refractive index of glue-line is preferably 1.0.Yet in other embodiments, can make reflector plate directly and LGP fit.

Step 120 is provided with the light emitting module comprise substrate and luminescence component, makes the luminescence component that is arranged on the substrate can be luminous towards the light inlet side of LGP.Light emitting module is preferably and adopts the striation of light emitting diode as luminescence component.In preferred embodiment, can be not do not form optical microstructures in the bottom surface of LGP with respect to the part of luminescence component and avoid the formation (shown in Fig. 3 B) of bright spot, and then improve the efficiency of light energy utilization.This moment, provide the step 110 of LGP to comprise among Fig. 5 A: step 111 provided LGP shown in Fig. 5 B, and this LGP has the light inlet side, be formed at the exiting surface of light inlet side edge and with respect to the bottom surface of exiting surface; Step 112 form the pattern-free zone in the bottom surface of LGP the part with respect to luminescence component; Step 113 forms the part of optical microstructures beyond in the pattern-free zone.The preferable mode of printing of adopting of part that other of pattern-free zone and bottom surface has optical microstructures forms.Yet in other embodiments, can look the setting that demand is adjusted optical microstructures, for example on whole bottom surface, form optical microstructures or on the bottom surface, do not form optical microstructures.In addition, the also visual demand of the generation type of pattern-free zone or optical microstructures adopts alternate manner.

The reflector that step 130 setting has first light-reflecting portion and second light-reflecting portion, first light-reflecting portion of second light-reflecting portion between the light inlet side of substrate surface that is arranged at light emitting module and LGP extended and a part of covering the exiting surface that is formed at an ora terminalis of light inlet side, makes reflector towards the LGP reflection light that luminescence component sent.In the present embodiment, reflector is a metal material, and the substrate surface of first light-reflecting portion and light emitting module fit (shown in Figure 1A).Yet in other embodiments, reflector can be other materials such as plastics, and first light-reflecting portion can keep a spacing with the substrate surface of light emitting module.In addition, in the present embodiment, the side of the first light-reflecting portion bottom is formed with recess and passes (shown in Figure 1B) for luminescence component; Yet in other present embodiment, can form perforation at the mid portion of first light-reflecting portion and pass (as shown in Figure 2) for luminescence component.

Step 140 fits in the bottom surface of LGP on the supporting construction.LGP is fixed on the supporting construction can increase integrally-built intensity.In preferred embodiment, be to adopt assembly such as backboard, and for example use glue material such as double faced adhesive tape that LGP is bonding on the backboard as supporting construction.In other embodiments, when reflector plate is posted in the bottom surface of LGP, the first surface of reflector plate can be fitted in the bottom surface of LGP by glue-line, with the then preferable use of first surface opposing second surface for example glue material such as double faced adhesive tape be bonding on backboard (shown in Figure 1A).The present invention improves the light inlet side of LGP and the light leak between the light emitting module by reflector is set with the structure of utilizing reflector, uses the raising efficiency of light energy utilization.

Fig. 6 is the flow chart of second embodiment of the manufacture method of backing structure of the present invention.As shown in Figure 6, this backing structure except that manufacture method except aforesaid step 110,120,130 and 140, also comprise the exiting surface that step 150 fits in blooming LGP.Preferable use glue material binds mutually between LGP and the blooming, and LGP is preferably optical flat, and its material can be the optical glass of soda-lime glass, silex glass, ultra-clear glasses or other type.Yet in other embodiments, visual demand adopts the LGP of other material.Blooming can be for example blooming piece of brightness enhancement film, diffusion barrier.In other embodiments, the demand of can looking overlapping is provided with many blooming pieces, and the multilayer complex films that also can adopt the function of integrating several diaphragms on a diaphragm is as blooming.

The present invention is described by above-mentioned related embodiment, yet the foregoing description is only for implementing example of the present invention.Must be pointed out that the embodiment that has disclosed does not limit the scope of the invention.On the contrary, being contained in the modification of the spirit of claim and scope and equalization is provided with and all is contained in the scope of the present invention.

Claims

1. backing structure comprises:

One LGP, a light inlet side and an exiting surface are formed at an ora terminalis of this light inlet side;

At least one light emitting module comprises a substrate and at least one luminescence component, and this substrate has a surface with respect to this light inlet side, and it is luminous towards this light inlet side that this luminescence component is set on this surface; And

One reflector, have interconnective one first light-reflecting portion and one second light-reflecting portion, this first light-reflecting portion is arranged between this light inlet side of this surface of this light emitting module and this LGP, this second light-reflecting portion is extended and is crossed over the boundary of this light inlet side and this exiting surface toward the direction of this LGP from the plane, place of this first light-reflecting portion, and this exiting surface of shaded portions, this first light-reflecting portion and this second light-reflecting portion reflect the light that this luminescence component sends towards this LGP.

2. backing structure according to claim 1 is characterized in that, this first light-reflecting portion is formed with a perforation and passes for this luminescence component.

3. backing structure according to claim 1 is characterized in that, the side of this first light-reflecting portion is formed with a recess and passes for this luminescence component.

4. backing structure according to claim 1, it is characterized in that, this LGP more comprises a bottom surface with respect to this exiting surface, this bottom surface forms a pattern-free zone with respect to the part of this luminescence component, and the other parts on this bottom surface beyond in this pattern-free zone are formed with at least one optical microstructures.

5. backing structure according to claim 4 is characterized in that, one of them adopts mode of printing formation at least for this pattern-free zone and this optical microstructures.

6. backing structure according to claim 1 is characterized in that, this LGP is an optical flat.

7. backing structure according to claim 6 is characterized in that, more comprises at least one blooming, and this blooming fits in this exiting surface of this LGP.

8. backing structure according to claim 7 is characterized in that, comprises a plurality of these bloomings of overlapping setting, and described blooming is fitted mutually, and fits in this exiting surface of this LGP.

9. backing structure according to claim 7 is characterized in that, this blooming is a multilayer complex films.

10. backing structure according to claim 6, it is characterized in that more comprise a reflector plate (reflector), this LGP more comprises a bottom surface with respect to this exiting surface, this reflector plate fits in this bottom surface, and reflects the light that this luminescence component sends towards this LGP.

11. backing structure according to claim 10 is characterized in that, more comprises a glue-line and is arranged between this reflector plate and this LGP, the refractive index of this glue-line equals 1.0 in fact.

12. backing structure according to claim 10 is characterized in that, more comprises a backboard, this reflector plate has a relative first surface and a second surface, and this first surface fits in this bottom surface of this LGP, and this second surface fits in this backboard.

13. backing structure according to claim 6 is characterized in that, the material of this optical flat is selected from soda-lime glass, silex glass and ultra-clear glasses.

14. backing structure according to claim 1 is characterized in that, more comprises a backboard, this LGP more comprises a bottom surface with respect to this exiting surface, and this bottom surface fits in this backboard.

15. a backing structure manufacture method comprises the following step:

One LGP is provided, and this LGP has a light inlet side and an exiting surface, and this exiting surface is formed at an ora terminalis of this light inlet side;

At least one light emitting module is set, and this light emitting module comprises a substrate and at least one luminescence component, and this substrate has a surface, and this luminescence component is arranged on this surface, wherein should the surface with respect to this light inlet side, make this luminescence component can be luminous towards this light inlet side; And

One reflector is set, this reflector has interconnective one first light-reflecting portion and one second light-reflecting portion, wherein this first light-reflecting portion is arranged between this light inlet side of this surface of this light emitting module and this LGP, this second light-reflecting portion is extended and is crossed over the boundary of this light inlet side and this exiting surface toward the direction of this LGP from the plane, place of this first light-reflecting portion, and this exiting surface of shaded portions, make this first light-reflecting portion and this second light-reflecting portion reflect the light that this luminescence component sends towards this LGP.

16. backing structure manufacture method according to claim 15 is characterized in that, more comprises to form a perforation in this second light-reflecting portion, passes for this luminescence component.

17. backing structure manufacture method according to claim 15 is characterized in that, more comprises to form a recess in the side of this second light-reflecting portion, passes for this luminescence component.

18. backing structure manufacture method according to claim 15, it is characterized in that, this LGP more comprises a bottom surface with respect to this exiting surface, this method more comprise form a pattern-free zone in this bottom surface the part with respect to this luminescence component, and form at least one optical microstructures on this bottom surface beyond this pattern-free zone.

19. backing structure manufacture method according to claim 18 is characterized in that, one of them adopts mode of printing formation at least for this pattern-free zone and this optical microstructures.

20. backing structure manufacture method according to claim 15 is characterized in that, this LGP is an optical flat.

21. backing structure manufacture method according to claim 20 is characterized in that, more comprises at least one blooming is set, and makes this blooming fit in this exiting surface of this LGP.

22. backing structure manufacture method according to claim 21 is characterized in that, comprises overlapping a plurality of these bloomings that are provided with, and described blooming is fitted mutually, and fit in this exiting surface of this LGP.

23. backing structure manufacture method according to claim 21 is characterized in that, this blooming is a multilayer complex films.

24. backing structure manufacture method according to claim 20, it is characterized in that, this LGP more comprises a bottom surface with respect to this exiting surface, this method more comprises a reflector plate is set, make this reflector plate fit in this bottom surface of this LGP, and reflect the light that this luminescence component sends towards this LGP.

25. backing structure manufacture method according to claim 24 is characterized in that, more comprises a glue-line to be set between this reflector plate and this LGP, the refractive index of this glue-line equals 1.0 in fact.

26. backing structure manufacture method according to claim 24, it is characterized in that, this reflector plate has a relative first surface and a second surface, and this first surface fits in this bottom surface of this LGP, and this method more comprises fits this second surface on a backboard.

27. backing structure manufacture method according to claim 20 is characterized in that the material of this optical flat is selected from soda-lime glass, silex glass and ultra-clear glasses.

28. backing structure manufacture method according to claim 15 is characterized in that, this LGP more comprises a bottom surface with respect to this exiting surface, and this method more comprises fits this bottom surface on a backboard.