CN201159778Y - Light conducting plate and side light type backlight module with the same - Google Patents
Light conducting plate and side light type backlight module with the same Download PDFInfo
- Publication number
- CN201159778Y CN201159778Y CNU2008200022091U CN200820002209U CN201159778Y CN 201159778 Y CN201159778 Y CN 201159778Y CN U2008200022091 U CNU2008200022091 U CN U2008200022091U CN 200820002209 U CN200820002209 U CN 200820002209U CN 201159778 Y CN201159778 Y CN 201159778Y
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- light
- prism
- collector lens
- guide plate
- light guide
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Abstract
Disclosed are a light guide plate and an edge-lit back light module of the light guide plate. The light guide plate includes a transparent base, a plurality of prisms and a plurality of condensing lenses. The prisms are arrayed on the surface of the transparent base in parallel. The condensing lens is arranged between two adjacent prisms, and the distribution is from sparseness to denseness along the crest line direction of the prism.
Description
Technical field
The side light type back light module that the utility model relates to a kind of light guide plate and has described light guide plate relates in particular to a kind of side light type back light module that has the light guide plate of microstructure and have described light guide plate.
Background technology
Light guide plate is the strength member that influences the optical efficiency of side light type back light module.Light guide plate is applied in the side light type back light module, the light that pointolite or line source sent can be changed into uniform surface light source, again uniformity coefficient and the brightness that is used for improving area source through the optically focused of the equal light action of diffusion sheet and brightness enhancement film.Light guide plate is divided into wedge type plate and flat board again on external form.General mobile computer is because of considering that spatial relationship all adopts the wedge type plate, and it is main that LCD monitor (LCDMonitor) then adopts flat board with LCD TV (LCD TV).
Figure 1A is the synoptic diagram with side light type back light module 100 of existing light guide plate.Side light type back light module 100 comprises light guide plate 120, light source 140, brightness enhancement film 160 and diffusion barrier 180.The body of light guide plate 120 is the wedge shape light-passing board, and its major function is the directing light direction, and is even with the briliancy and the control brightness that improve liquid crystal panel.Wedge shape light guide plate 120 generally has thick end face 122, thin end face 124, bottom surface 126 and end face 128.In the assembling process of side light type back light module 100, light guide plate 120 normally bottom surface 126 down, end face 128 up, blooming pieces such as brightness enhancement film 160 and diffusion barrier 180 then are located at end face 128 tops.But this figure with bottom surface 126 up so that the explanation microstructure.
The bottom surface 126 of existing light guide plate 120 forms microstructure, shape such as a plurality of prism 126a arranged side by side, or be called the V-cut structure.Light source 140 generally is positioned at the sidepiece of the thick end face 122 of light guide plate 120.After most light enters light guide plate 120, utilize total reflection toward thin end face 124 conduction.When light is conducted to behind the prism 126a of light guide plate 120 bottom surfaces 126, can be penetrated (as shown by arrows) by end face 128 again by optically focused.Therefore, it is more even to utilize the design of microstructure that light is passed through after the light guide plate 120.
Yet, because the bottom surface of light guide plate 120 126 uses prism 126a to do the effect of optically focused, so when line source or pointolite are sent light into light guide plate 120, can cause the light incident side of light guide plate 120 that significantly bright dark alternate phenomenon is arranged because light concentrates, with reference to Figure 1B and Fig. 1 C.Figure 1B shows when light source 140 is cold cathode ray tube 140a, bright line 102 distribution situations of side light type back light module 100, and Fig. 1 C shows when light source 140 is made up of light emitting diode 140b, bright dizzy 104 the distribution situation of side light type back light module 100., must the bright variation of backlight module be adjusted to evenly with in the backlight module at present high brightness as far as possible.
For the problems referred to above, existing solution is that thick end face 122 is made into cloudy surface, allow the light of sending in the light guide plate 120 present situation more at random, but the method can increase processing step, and raise the cost, and reduce yield and light service efficiency indirectly.
The utility model content
The purpose of this utility model is to provide a kind of light guide plate with microstructure, is applied to can improve in the backlight module optical profile and optically focused effect, with raising light service efficiency, and can adjust optical frame simultaneously.
Other purpose of the present utility model and advantage can be further understood from technical characterictic disclosed in the utility model.
For reaching above-mentioned one or part or whole purposes or other purpose, the light guide plate of an embodiment of the present utility model comprises transparent substrates, a plurality of prism and a plurality of collector lens.Transparent substrates has face.A plurality of prisms are arranged on this face of transparent substrates side by side.A plurality of collector lenses are disposed between every adjacent two prisms, and along the crest line direction of prism by dredging to close distribution.
An embodiment of the present utility model provides backlight module, comprises transparent substrates, light source, a plurality of prism and a plurality of collector lens.Transparent substrates has bottom surface, light-emitting face and light entrance face, and light-emitting face is relative with the bottom surface, and light entrance face connects bottom surface and light-emitting face.Light source is located at a side of transparent substrates, and towards light entrance face.A plurality of prisms protrude from the bottom surface, and are arranged on the bottom surface side by side.A plurality of collector lenses are disposed between every adjacent two prisms, and along the crest line direction of prism, from described light entrance face by dredging to close distribution.The light that light source sent is incident in the transparent substrates by light entrance face, after assembling by prism and collector lens, penetrates via light-emitting face.
Preferably, in above-mentioned light guide plate, collector lens and transparent substrates are one-body molded.The part of the bottom surface of light-transparent substrate between every adjacent two prisms is the par, and collector lens is distributed on the described par.Prism has first height, and collector lens has second height, and second height is less than first height.Prism comprises first prism, second prism and prism, and described collector lens the part between second and third prism is staggered in part between first and second prism and described collector lens.Collector lens is cylindric, spherical or round table-like, or is sphere or aspheric lens.
In the preferred implementation of above-mentioned side light type back light module, the crest line direction of prism is parallel to the light incident direction of light source.Light source can be light emitting diode.
Description of drawings
Figure 1A is the synoptic diagram with side light type back light module of existing light guide plate;
Figure 1B is the bright line distribution schematic diagram of existing backlight module;
Fig. 1 C is the bright dizzy distribution schematic diagram of existing backlight module;
Fig. 2 A and Fig. 2 B are according to the first embodiment of the present invention, the synoptic diagram of light guide plate and microstructure thereof;
Fig. 2 C is another embodiment synoptic diagram according to the first embodiment of the present invention;
Fig. 3 A and Fig. 3 B be for according to a second embodiment of the present invention, the synoptic diagram of light guide plate and microstructure thereof;
Fig. 4 is an a third embodiment in accordance with the invention, the synoptic diagram of light guide plate and microstructure thereof;
Fig. 5 is according to one embodiment of the invention, the side light type back light module synoptic diagram.
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present utility model, in DETAILED DESCRIPTION OF THE PREFERRED, can clearly present below in conjunction with accompanying drawing.The direction term of being mentioned in following examples, for example: upper and lower, left and right, front or rear etc. only are directions with reference to the accompanying drawings.Therefore, the direction term of use is to be used for illustrating not to be to be used for limiting the utility model.
Please refer to Fig. 2 A and Fig. 2 B, light guide plate 200 comprises light-transparent substrate 220 and two kind of microstructure, and these microstructures are formed at the bottom surface 222 of light-transparent substrate 220.Two kinds of microstructures comprise a plurality of prisms 240 and a plurality of collector lenses 260.Shown in Fig. 2 A, a plurality of prisms 240 are arranged on the bottom surface 222 of light-transparent substrate 220 side by side.A plurality of collector lenses 260 are disposed between every adjacent two prisms 240, and along crest line 242 directions of prism 240 by dredging to close distribution.
Fig. 2 A has also shown light incident direction (as shown by arrows), and in the present embodiment, defining the direction parallel with the light incident direction is the Y direction, and vertical with the light incident direction and parallel with bottom surface 222 direction is a directions X.When light guide plate 200 is applied in the side light type back light module, crest line 242 directions of prism 240 are parallel with the Y direction, cause on directions X, and light is concentrated to central authorities by the crest line 242 that is positioned at both sides.When side light type back light module is installed in the back side of liquid crystal panel (not shown), the brightness of whole liquid crystal panel central authorities is increased.In practical application, prism 240 is not limited to pointed in the accompanying drawing, also can be formed with par (not shown), gets final product so long as can reach the structure of optically focused effect.Yet if above-mentioned collector lens 260 is not set, on the Y direction, its brightness distribution curve A shows that side light type back light module is higher in the side brightness near light source (not shown), and more then brightness is decrescence away from light source.
In the present embodiment, be provided with the collector lens 260 of the bottom surface 222 that is raised in light-transparent substrate 220 between any two adjacent ribs mirrors 240.On the Y direction near the end of light source, the more sparse spotlight effect of the arrangement of collector lens 260 with the close to sources position that reduces light guide plate 200.Away from the end of light source, the arrangement of collector lens 260 is closely to increase the spotlight effect away from light source site of light guide plate 200 on the Y direction.Thus, the uniformity coefficient of the brightness of scalable backlight module on the Y direction is shown in brightness distribution curve B.
With reference to Fig. 2 B, the preferred embodiment of light guide plate 200 is described as follows.The part of the bottom surface 222 of light-transparent substrate 220 between every adjacent two prisms 240 is par 280, and collector lens 260 is distributed on the par 280.Preferably, prism 240, collector lens 260 are one-body molded with light-transparent substrate 220, make the making step of mould easier, avoid increasing the die sinking cost.Prism 240 is raised in the bottom surface 222 of light-transparent substrate 220, between the crest line 242 at its top and the par 280 at a distance of first height H 1.Between the top of collector lens 260 and the par 280 at a distance of second height H 2.Second height H 2 should be less than first height H 1.Thus, light guide plate 200 utilizes prism 240 to do the optically focused effect, and the collector lens 260 of the gradually close formula distribution of collocation can reach the effect and the function of adjusting optical profile of optically focused to adjust Luminance Distribution again.
With reference to Fig. 3 A and Fig. 3 B, light guide plate 300 has round table-like collector lens 360, and the collector lens 360 between the first prism 340a and the second prism 340b and be positioned at the second prism 340b and prism 340c between collector lens 360 be staggered so that light distributes more equably.Wherein the first prism 340a, the second prism 340b and prism 340c are any continuously arranged prism 340 in a plurality of prisms 340 of light guide plate 300.
With reference to Fig. 4, in the light guide plate 400 of another embodiment, collector lens 460 can intersperse among to point-like between every adjacent two prisms 440, and it is more sparse to distribute at the collector lens 460 near light incident side, and closeer away from collector lens 460 distributions of light incident side.Synthesizing map 2A, Fig. 3 A and shown in Figure 4, collector lens 260,360,460 can be the concentration structure of cylindric, round table-like or spherical or other shape.Also promptly, collector lens 260,360,460 can be sphere or aspheric collector lens.
Fig. 5 is inverted backlight module 500, with convenient explanation feature of the present invention.Backlight module 500 comprises above-mentioned light guide plate 300, light source 520, brightness enhancement film 540 and diffusion barrier 560.Light guide plate 300 comprises light-transparent substrate 320, prism 340 and collector lens 360.Light-transparent substrate 320 has bottom surface 322, light-emitting face 324 and light entrance face 326.Light-emitting face 324 is relative with bottom surface 322, and light entrance face 326 connects bottom surface 322 and light-emitting face 324.560 of brightness enhancement film 540 and diffusion barriers are located at the light exit direction of light-emitting face 324.Light source 520 is located at a side of light-transparent substrate 320, and towards light entrance face 326.A plurality of prisms 340 protrude from bottom surface 322, and are arranged in side by side on the bottom surface 322 each other.A plurality of collector lenses 360 are disposed between every adjacent two prisms 340, and along the crest line direction of prism 340, from described light entrance face by dredging to close distribution.The light that light source 520 is sent is incident in the light guide plate 300 by light entrance face 326,, penetrates via light-emitting face 324 after the convergence of rays by prism 340 and collector lens 360.
In all preferred implementations of above-mentioned side light type back light module, the crest line direction of prism is parallel to the light incident direction of light source.Light source can be made up of or for line source, for example: light emitting diode or cold cathode ray tube pointolite.Utilize collector lens between the adjacent two prisms to do the adjustment of optical frame and optical appearance, can improve the utilization rate of light source.
The above, it only is preferred embodiment of the present utility model, when not limiting the scope that the utility model is implemented with this, promptly all simple equivalent of being done according to the utility model claim and utility model description change and modify, and all still belong to the scope that the utility model patent contains.Arbitrary embodiment of the present utility model in addition or claim must not reached whole purpose disclosed in the utility model or advantage or characteristics.In addition, summary part and title only are the usefulness that is used for assisting the patent document search, are not to be used for limiting interest field of the present utility model.
Claims (16)
1, a kind of light guide plate is characterized in that, comprising:
Light-transparent substrate has face;
A plurality of prisms are arranged on described of described light-transparent substrate side by side; And
A plurality of collector lenses are disposed between every adjacent two described prisms, and along the crest line direction of described prism by dredging to close distribution.
2, light guide plate as claimed in claim 1 is characterized in that, wherein said collector lens and described light-transparent substrate are one-body molded.
3, light guide plate as claimed in claim 1 is characterized in that, described the part between every adjacent two described prisms of wherein said light-transparent substrate is the par, and described collector lens is distributed on the described par.
4, light guide plate as claimed in claim 1 is characterized in that, wherein said prism has first height, and described collector lens has second height, and described second height is less than described first height.
5, light guide plate as claimed in claim 1, it is characterized in that, wherein said prism comprises first prism, second prism and prism, and described collector lens the part between described second and third prism is staggered in part between described first and second prism and described collector lens.
6, light guide plate as claimed in claim 1 is characterized in that, wherein said collector lens is cylindric, spherical or round table-like.
7, light guide plate as claimed in claim 1 is characterized in that, wherein said collector lens is sphere or aspheric surface shape.
8, a kind of side light type back light module is characterized in that, comprising:
Light-transparent substrate has bottom surface, light-emitting face and light entrance face, and wherein said light-emitting face is relative with described bottom surface, and described light entrance face connects described bottom surface and described light-emitting face;
Light source is located at a side of described light-transparent substrate, and towards described light entrance face;
A plurality of prisms protrude from described bottom surface, and are arranged in side by side on the described bottom surface; And
A plurality of collector lenses are disposed between every adjacent two described prisms, and along the crest line direction of described prism, from described light entrance face by dredging to close distribution,
The light that wherein said light source sent is incident in the described light-transparent substrate by described light entrance face, after assembling by described prism and described collector lens, penetrates via described light-emitting face.
9, backlight module as claimed in claim 8 is characterized in that, the crest line direction of wherein said prism is parallel to the light incident direction of described light source.
10, backlight module as claimed in claim 8 is characterized in that, the part of the described bottom surface of wherein said light-transparent substrate between every adjacent two described prisms is the par, and described collector lens is distributed on the described par.
11, backlight module as claimed in claim 8 is characterized in that, wherein said prism has first height, and described collector lens has second height, and described second height is less than described first height.
12, backlight module as claimed in claim 8, it is characterized in that, wherein said prism comprises first prism, second prism and prism, and described collector lens the part between described second and third prism is staggered in part between described first and second prism and described collector lens.
13, backlight module as claimed in claim 8 is characterized in that, wherein said collector lens is cylindric, spherical or round table-like.
14, backlight module as claimed in claim 8 is characterized in that, wherein said collector lens is sphere or aspheric surface shape.
15, backlight module as claimed in claim 8 is characterized in that, wherein said collector lens and described light-transparent substrate are one-body molded.
16, backlight module as claimed in claim 8 is characterized in that, wherein said light source has light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200022091U CN201159778Y (en) | 2008-01-04 | 2008-01-04 | Light conducting plate and side light type backlight module with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200022091U CN201159778Y (en) | 2008-01-04 | 2008-01-04 | Light conducting plate and side light type backlight module with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201159778Y true CN201159778Y (en) | 2008-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200022091U Expired - Fee Related CN201159778Y (en) | 2008-01-04 | 2008-01-04 | Light conducting plate and side light type backlight module with the same |
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| Country | Link |
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| CN (1) | CN201159778Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012071752A1 (en) * | 2010-11-30 | 2012-06-07 | 深圳市华星光电技术有限公司 | Backlight module and light guide plate thereof |
| CN103032821A (en) * | 2011-09-29 | 2013-04-10 | 佳能株式会社 | Light guide, illumination device, and image reading apparatus |
| CN103631055A (en) * | 2012-08-20 | 2014-03-12 | 三星显示有限公司 | Display apparatus |
| CN103901526A (en) * | 2012-12-28 | 2014-07-02 | 群创光电股份有限公司 | Light guide plate, backlight module and display device |
| CN109218479A (en) * | 2018-10-30 | 2019-01-15 | 维沃移动通信有限公司 | A kind of electronic equipment |
| CN110462286A (en) * | 2017-03-31 | 2019-11-15 | 3M创新有限公司 | Light guide |
-
2008
- 2008-01-04 CN CNU2008200022091U patent/CN201159778Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012071752A1 (en) * | 2010-11-30 | 2012-06-07 | 深圳市华星光电技术有限公司 | Backlight module and light guide plate thereof |
| CN103032821A (en) * | 2011-09-29 | 2013-04-10 | 佳能株式会社 | Light guide, illumination device, and image reading apparatus |
| US8867109B2 (en) | 2011-09-29 | 2014-10-21 | Canon Kabushiki Kaisha | Light guide, illumination device, and image reading apparatus |
| CN103631055A (en) * | 2012-08-20 | 2014-03-12 | 三星显示有限公司 | Display apparatus |
| CN103901526A (en) * | 2012-12-28 | 2014-07-02 | 群创光电股份有限公司 | Light guide plate, backlight module and display device |
| US9274262B2 (en) | 2012-12-28 | 2016-03-01 | Innolux Corporation | Light guiding plate, backlight module and display device |
| CN110462286A (en) * | 2017-03-31 | 2019-11-15 | 3M创新有限公司 | Light guide |
| US10775547B2 (en) | 2017-03-31 | 2020-09-15 | 3M Innovation Properties Company | Lightguide |
| CN109218479A (en) * | 2018-10-30 | 2019-01-15 | 维沃移动通信有限公司 | A kind of electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20100204 |