CN101201493A - Backlight module and manufacturing method thereof - Google Patents
Backlight module and manufacturing method thereof Download PDFInfo
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- CN101201493A CN101201493A CNA2006101575139A CN200610157513A CN101201493A CN 101201493 A CN101201493 A CN 101201493A CN A2006101575139 A CNA2006101575139 A CN A2006101575139A CN 200610157513 A CN200610157513 A CN 200610157513A CN 101201493 A CN101201493 A CN 101201493A
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Abstract
The invention relates to a backlighting module and comprises a light source and a metal frame; the metal frame comprises a bottom plate and a light guide layer; the surface of the bottom plate is provided with a plurality of stipples and the light guide layer covers the stipple; the light guide layer is integrated with the metal frame and the light source is arranged on the surface of the bottom plate and is close to the lateral surface of the light guide layer. The backlighting module of the invention improves the light utilization rate of the light source and strengthens the brightness of backlight. The invention provides a manufacturing method of the backlighting module at the same time.
Description
Technical field
The present invention relates to a kind of module backlight and manufacture method thereof.
Background technology
Along with digital development of science and technology, liquid crystal display product has been widely used in each aspect of daily life, to the also progressively raising of image quality requirement of LCD Panel.But liquid crystal itself can be not luminous, and needing light source constantly provides light to inject LCD Panel, can realize that picture shows, in liquid crystal display product, selects module backlight that light is provided usually.
Seeing also Fig. 1, is a kind of schematic cross-section of module backlight of prior art.This module 1 backlight comprises a prismatic lens 10, a diffusion sheet 11, a light source 12, a light source cover 13, a light guide plate 14, a glue frame 15, a reflector plate 16 and a metal frame 17.Wherein, this light source cover 13 is accommodated this light source 12, this prismatic lens 10, this diffusion sheet 11, this light guide plate 14 and the overlapping successively setting of this reflector plate 16, this glue frame 15 cooperate with this metal frame 17 accommodates this prismatic lens 10, this diffusion sheet 11, this light source cover 13, this light guide plate 14 and this reflector plate 16.
This light guide plate 14 is rectangular flats, and it has an incidence surface 141, an exiting surface 142 and a bottom surface 143.This exiting surface 142 is oppositely arranged with this bottom surface 143, and adjacent with this incidence surface 141 respectively.This bottom surface 143 is provided with a plurality of semispheres site 144 at interval.This module 1 backlight is used for liquid crystal indicator when providing backlight, the light that this light source 12 produces imports this light guide plate 14 from this incidence surface 141, this incident ray is handled the back by this light guide plate 14 and is penetrated by this exiting surface 142, and offers display panels via this diffusion sheet 11 and this prismatic lens 10.
Yet, in the above-mentioned module 1 backlight, because the bottom surface 143 of this light guide plate 14 is provided with a plurality of sites 144, thus there is the gap between this light guide plate 14 and this reflector plate 16, as shown in Figure 2.In by the light of these reflector plate 16 reflections, now the reflection angle of the reflection ray at these 143 edges, light guide plate 14 bottom surfaces of the lucky process of hypothesis is α, then reflection angle all can be injected this light guide plate 14 less than the reflection ray of α, and reflection angle all can be injected this glue frame 15 greater than the light of α and be absorbed, cause the partly loss of light, thereby these light source 12 light utilization efficiencies are reduced; And when assembling this module 1 backlight, this light guide plate 14 needs by these glue frame 15 fixings, and this will increase assembling procedure and built-up time, thus the raising assembly cost.
Summary of the invention
The low and high problem of assembly cost of light source light utilization factor in order to solve module backlight in the prior art the invention provides a kind of module backlight that can effectively improve the light source light utilization factor and reduce assembly cost.
Simultaneously, the present invention also provides a kind of manufacture method of this module backlight.
A kind of module backlight, it comprises a light source and a metal frame, this metal frame comprises a base plate and an optical waveguide layer, this backplate surface has a plurality of sites, this optical waveguide layer covers this site, and this optical waveguide layer and this metal frame are one, and this light source is located at this backplate surface and is provided with near this optical waveguide layer side.
A kind of manufacture method of module backlight, it may further comprise the steps: a metal frame is provided, and this metal frame comprises a base plate; This base plate is divided into two adjacent areas, and a plurality of sites spaced apart are made on the surface in a zone therein; Form an optical waveguide layer on the surface in this site and this zone, this optical waveguide layer and this metal frame are one; Another zone at this base plate is provided with a light source, and this light source is provided with near this optical waveguide layer side, finishes the manufacture process of this module backlight.
Compared to prior art, in the module backlight of the present invention, this optical waveguide layer and this metal frame are one, there is not the gap between this optical waveguide layer and this base plate, so the light that is reflected by this base plate all injects this optical waveguide layer, avoid light ejaculation gap and cause light losing, thereby improve the light utilization efficiency of this light source, strengthen brightness backlight; And this module backlight utilizes this base plate as reflecting element, saves independent reflector plate element, thereby reduces material cost.
Compared to prior art, in the manufacture method of module backlight of the present invention, module backlight of the present invention is because this optical waveguide layer is formed on the surface in this site and this zone, so do not need to come this optical waveguide layer of fixing with the glue frame, make manufacturing process simple, when also reducing worker simultaneously, reduce manufacturing cost; And this optical waveguide layer and this metal frame are integrally formed, do not have the gap between this optical waveguide layer and this zone, all injected this optical waveguide layer by the light of this regional reflex, avoid light ejaculation gap and cause light losing, thereby improve the light utilization efficiency of this light source, strengthen brightness backlight; In addition, this module backlight utilizes a zone of this base plate as reflecting element, saves independent reflector plate element, thereby reduces material cost.
Description of drawings
Fig. 1 is the schematic cross-section of the module backlight of prior art.
Fig. 2 is the light path synoptic diagram that amplify the part of module backlight shown in Figure 1.
Fig. 3 is the schematic cross-section of module backlight first embodiment of the present invention.
Fig. 4 is the light path synoptic diagram that amplify the part of module backlight shown in Figure 3.
Fig. 5 is the schematic cross-section of module backlight second embodiment of the present invention.
Embodiment
Please refer to Fig. 3, is the schematic cross-section of module backlight first embodiment of the present invention.This module 2 backlight comprises a prismatic lens 20, a diffusion sheet 21, a light source 22, a light source cover 23 and a metal frame 25.
This metal frame 25 has a rectangular base plate 251, four sidewalls 252 and optical waveguide layers 254.Wherein, these four sidewalls 252 all are vertically installed in four edges of this base plate 251, and end to end.
This base plate 251 has two adjacent first area 258 and second areas 259.Wherein, this base plate 251 is one to have the sheet metal of reflective character, so this first area 258 also has reflection characteristic.These 258 surfaces, first area have a plurality of sites 253 spaced apart, and this site 253 is hemispherical projections.This optical waveguide layer 254 is located at this first area 258 and is covered these a plurality of sites 253, and this optical waveguide layer 254 is one with this metal frame 25.
This optical waveguide layer 254 has an incidence surface 255 and an exiting surface 256, this incidence surface 255 and these exiting surface 256 adjacent settings, and this incidence surface 255 is perpendicular to this base plate 251, and this exiting surface 256 is away from this base plate 251 and parallel with this base plate 251.
This light source cover 23 is accommodated this light source 22, and is arranged on this second area 259, makes incidence surface 255 one sides of this light source 22 in the face of this optical waveguide layer 254.This diffusion sheet 21 and this prismatic lens 20 are cascadingly set on exiting surface 256 1 sides of this optical waveguide layer 254, and are contained in this metal frame 25.
When this module 2 backlight is used for liquid crystal indicator when providing backlight, the light that this light source 22 produces imports this optical waveguide layer 254 from this incidence surface 255, this incident ray passes through this optical waveguide layer 254 and handles the back by these exiting surface 256 ejaculations, and offers display panels to realize the image demonstration via this diffusion sheet 21 and this prismatic lens 20.
Seeing also Fig. 4, is the above-mentioned module backlight 2 local light path synoptic diagram that amplify.Because this optical waveguide layer 254 is one with this metal frame 25, so do not have the gap between this optical waveguide layer 254 and this metal frame 25, light by these first area 258 reflections all enters this optical waveguide layer 254, is also all entered this optical waveguide layer 254 by the light of sidewall 252 reflections of this metal frame 25.
Certainly, the site 253 in the present embodiment also can be the projection of other shape, as the projection of rectangular protrusions or other shape.
Compared to prior art, in the module backlight 2 of the present invention, because this optical waveguide layer 254 is one with this metal frame 25, so make between this optical waveguide layer 254 and this metal frame 25 and do not have the gap, light by these first area 258 reflections all injects this optical waveguide layer 254, is also all entered this optical waveguide layer 254 by the light of sidewall 252 reflections of this metal frame 25, avoids light ejaculation gap and causes light losing, thereby improve the light utilization efficiency of this light source 22, strengthen brightness backlight; And independent reflector plate element is saved as reflecting element in the first area 258 that this module 2 backlight utilizes this metal frame 25, thereby reduces material cost.
The manufacture method of this module 2 backlight, it may further comprise the steps:
A., one metal frame 25 is provided, and this metal frame 25 comprises a base plate 251 and four sidewalls 252, and these four sidewalls 252 are vertically set on four edges of this base plate 251, and end to end.
B. this base plate 251 is divided into two adjacent first area 258 and second areas 259, and makes a plurality of sites spaced apart 253 on these 258 surfaces, first area by the method for machining.
Wherein, this base plate 251 is one to have the sheet metal of reflective character, so this first area 258 also has reflection characteristic.These a plurality of sites 253 are processed as hemispherical projections, simultaneously, also can be processed as the projection of rectangle or other shape.These a plurality of sites 253 also can be manufactured on these 258 surfaces, first area by the method for chemical etching.
C. by the injection molding technology, inject transparent plastic material on the surface of this first area 258 and this site 253, form an optical waveguide layer 254, this optical waveguide layer 254 is integrally formed with this metal frame 25.
Wherein, formed optical waveguide layer 254 has an incidence surface 255 and an exiting surface 256, and this incidence surface 255 is adjacent with this exiting surface 256, and this incidence surface 255 is perpendicular to this base plate 251, and this exiting surface 256 is away from this base plate 251 and parallel with this base plate 251.This transparent plastic material adopts polymethylmethacrylate, in addition also can adopt macromolecule carbonic acid fat material.
D., one light source cover 23 and a light source 22 are set on this second area 259, and this light source 22 is contained in this light source cover 23.
E. at exiting surface 256 1 sides of this optical waveguide layer 254 be cascading a diffusion sheet 21 and a prismatic lens 20, and be contained in this metal frame 25, thereby finish the manufacture process of this module 2 backlight.
Compared to prior art, in the manufacture method of module 2 backlight of the present invention, this optical waveguide layer 254 is formed at the surface of this site 253 and this first area 258, so do not need to come this optical waveguide layer 254 of fixing with the glue frame, make assembling procedure simple, also reduce simultaneously and assemble man-hour, reduced assembly cost; And, this optical waveguide layer 254 is integrally formed with this metal frame 25, there is not the gap between this optical waveguide layer 254 and this metal frame 25, light by these first area 258 reflections all injects this optical waveguide layer 254, light by sidewall 252 reflections of this metal frame 25 also all enters this optical waveguide layer 254, avoid light ejaculation gap and cause light losing, thereby improve the light utilization efficiency of this light source 22, strengthen brightness backlight; In addition, independent reflector plate element is saved as reflecting element in the first area 258 that this module 2 backlight utilizes this metal frame 25, thereby reduces material cost.
Seeing also Fig. 5, is the schematic cross-section of module backlight second embodiment of the present invention.The structure of this module 3 backlight and first embodiment are roughly the same, its difference is: the surface of this base plate 351 and this site 353 is provided with the metal film 357 of one deck tool high reflectance, this metal film 357 is aluminium films in the present embodiment, in addition, also can be a silverskin.Improve this base plate 351 first areas 358 and the reflectivity that is arranged at the site 353 on this first area 358 by this metal film 357, reduce the loss of light reflex time, improve the light utilization efficiency of this light source 32 better, thereby strengthen the brightness of this module 3 backlight.
The manufacture method and first embodiment of the module backlight 3 of present embodiment are roughly the same, its difference is: in step b, adopt chemical deposition, form the metal film 357 of one deck high reflectance on the surface of these base plate 351 surfaces and this site 353, this metal film 357 can be an aluminium film, also can be a silverskin.Above-mentioned metal film 357 also can adopt the method for sputter to form.
Claims (10)
1. module backlight, it comprises a light source and a metal frame, it is characterized in that: this metal frame comprises a base plate and an optical waveguide layer, this light source is arranged at this backplate surface and close this optical waveguide layer side, this backplate surface has a plurality of sites, this optical waveguide layer covers this site, and this optical waveguide layer and this metal frame are one.
2. module backlight as claimed in claim 1 is characterized in that: this site is spaced apart.
3. module backlight as claimed in claim 1 is characterized in that: this site is hemispherical projections or rectangular protrusions.
4. module backlight as claimed in claim 1 is characterized in that: the surface of this base plate and this site is provided with the metal film of one deck tool high reflectance.
5. the manufacture method of a module backlight, it may further comprise the steps:
A., one metal frame is provided, and this metal frame comprises a base plate;
B. this base plate is divided into two adjacent areas, and a plurality of sites are made on the surface in a zone therein;
C. form an optical waveguide layer on the surface in this site and this zone, this optical waveguide layer and this metal frame are integrally formed;
D. another region surface at this base plate is provided with a light source, and this light source is provided with near this optical waveguide layer side, finishes the manufacture process of this module backlight.
6. the manufacture method of module backlight as claimed in claim 5, it is characterized in that: this site is spaced apart among the step b.
7. the manufacture method of module backlight as claimed in claim 5 is characterized in that: this site forms by machining process or chemical etching method manufacturing among the step b.
8. the manufacture method of module backlight as claimed in claim 5 is characterized in that: this optical waveguide layer adopts the manufacturing of injection molding technology to form among the step c.
9. the manufacture method of module backlight as claimed in claim 5 is characterized in that: this optical waveguide layer adopts polymethylmethacrylate or macromolecule carbonic acid fat made to form among the step c.
10. the manufacture method of module backlight as claimed in claim 5 is characterized in that: among the step b, adopt the method for chemogenic deposit or sputter, form a metal film on the surface of this base plate and this site.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101575139A CN101201493A (en) | 2006-12-13 | 2006-12-13 | Backlight module and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101575139A CN101201493A (en) | 2006-12-13 | 2006-12-13 | Backlight module and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101201493A true CN101201493A (en) | 2008-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101575139A Pending CN101201493A (en) | 2006-12-13 | 2006-12-13 | Backlight module and manufacturing method thereof |
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| CN (1) | CN101201493A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013037159A1 (en) * | 2011-09-14 | 2013-03-21 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module |
| CN105372749A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PMMA light guide plate with prism structure |
| CN105527673A (en) * | 2016-01-05 | 2016-04-27 | 京东方光科技有限公司 | Light guide component, backlight module and display device |
-
2006
- 2006-12-13 CN CNA2006101575139A patent/CN101201493A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013037159A1 (en) * | 2011-09-14 | 2013-03-21 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module |
| CN105372749A (en) * | 2015-11-13 | 2016-03-02 | 重庆鑫翎创福光电科技股份有限公司 | PMMA light guide plate with prism structure |
| CN105527673A (en) * | 2016-01-05 | 2016-04-27 | 京东方光科技有限公司 | Light guide component, backlight module and display device |
| US10473978B2 (en) | 2016-01-05 | 2019-11-12 | Boe Technology Group Co., Ltd. | Light guide assembly, backlight module, display device |
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