CN100395611C - Light conducting plate and manufacturing method thereof - Google Patents
Light conducting plate and manufacturing method thereof Download PDFInfo
- Publication number
- CN100395611C CN100395611C CNB200310117597XA CN200310117597A CN100395611C CN 100395611 C CN100395611 C CN 100395611C CN B200310117597X A CNB200310117597X A CN B200310117597XA CN 200310117597 A CN200310117597 A CN 200310117597A CN 100395611 C CN100395611 C CN 100395611C
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- Prior art keywords
- guide plate
- light
- light guide
- manufacturing
- passing board
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- 238000004519 manufacturing process Methods 0.000 title claims abstract 12
- 238000000034 method Methods 0.000 claims abstract 11
- 238000005491 wire drawing Methods 0.000 claims abstract 5
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005530 etching Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
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- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The present invention discloses a light guiding plate and a manufacturing method thereof. The light guiding plate comprises a light transmission plate which comprises a light entrance surface, a light emission surface for emitting a light beam and a bottom surface which is opposite to the light emission surface, wherein filiform protrusions are distributed on the light emission surface. The manufacturing method of the light guiding plate comprises the following procedures: manufacturing a master mold; forming a mold core in the master mold; manufacturing a wire drawing structure on the mold core by using a mechanical grinding machine; manufacturing the light guiding plate by using an injection forming method.
Description
[technical field]
The invention relates to a kind of light guide plate and manufacture method thereof.
[background technology]
Because the liquid crystal itself in the panel of LCD does not have the characteristics of luminescence, therefore, for reaching display effect, a planar light source device is provided for the LCD panel, as backlight module, its function is area source abundant to panel of LCD supply briliancy and that be evenly distributed.
The prior art backlight module is to be made of light source, reflecting plate, light guide plate, diffuser plate and layers of prisms etc., and wherein light guide plate is the key component in the backlight module, its role is to guide incident light through light guide plate scattering and total reflection and convert area source to.Briliancy homogenising distribution more for making this area source is provided with a diffuser plate in light guide plate exit facet one side usually.
Wherein a kind of prior art backlight module can be consulted No. the 486101st, the TaiWan, China patent announcement of on May 1st, 2002 bulletin, its disclosed backlight module as shown in Figure 1, this backlight module 100 comprises a folded in regular turn layers of prisms 130, a diffuser plate 120 and a light guide plate 110 of establishing, and being provided with a linear light source 140 in these light guide plate 110 side end, this layers of prisms 130 is made up of digonous runner plate 131,133.The light that this light guide plate 110 is sent linear light source 140 penetrates toward spreading towards these diffuser plate 120 one sides, and then by these layers of prisms 130 outgoing.
This backlight module 100 also has a reflection horizon 150 at the bottom surface of light guide plate 110 sputter, and after the light that linear light source 140 sends entered from these light guide plate 110 side end, via the reflection in this reflection horizon 150, diffusion was penetrated behind diffuser plate 120.
This backlight module 100 is provided with diffuser plate 120, so that the abundant scattering of the light beam of outgoing and reach the briliancy homogenising.But diffuser plate material cost height, process complexity when being assembled into this backlight module expends man-hour and human cost.And have two optics interfaces between this light guide plate 110 and the diffuser plate 120, these two optics interfaces can cause a certain amount of optical loss, cause backlight module 100 briliancy to reduce, and influence its whole optical property.
[summary of the invention]
In order to overcome the low defective of prior art light guide plate outgoing light homogeneity, the invention provides the higher light guide plate of a kind of outgoing light homogeneity.
The present invention also provides a kind of method of making above-mentioned light guide plate.
The employed technical scheme of technical solution problem of the present invention is: a light guide plate is provided, it comprises a light-passing board, this light-passing board comprises that an incidence surface, is used for the exiting surface and the bottom surface with respect to this exiting surface of outgoing beam, be distributed with thread projection on this exiting surface, this thread projection is to utilize mechanical grinding machine to obtain with jet forming method after making the wire drawing structure on the light guiding board mould core again, and this thread projection is used for the light of scattering from this exiting surface outgoing.
Method for manufacturing light guide plate of the present invention comprises the steps: to make master mold, forms die in master mold; On die, make the wire drawing structure; Utilize jet forming method to make light guide plate.
Wherein, this wire drawing structure can utilize mechanical grinding machine to make.
Compare prior art, the invention has the beneficial effects as follows: have thread projection on the light guide plate exiting surface of the present invention, fully scattering is from the light of exiting surface outgoing, thereby makes the briliancy homogenising more of emergent ray; And this thread projection and light guide plate are one-body molded, have reduced the optics interface, have improved light utilization efficiency; In addition, this thread projection is made simple, only needs to utilize mechanical grinding machine to produce the wire drawing structure and get final product on die.
[description of drawings]
Fig. 1 is the side schematic view of prior art backlight module.
Fig. 2 is the stereographic map of light guide plate of the present invention.
Fig. 3 is the outboard profile of light guide plate of the present invention.
Fig. 4 is the partial enlarged drawing of Fig. 3.
Fig. 5 is the process flow diagram of method for manufacturing light guide plate of the present invention.
[embodiment]
See also Fig. 2, Fig. 3, light guide plate 200 of the present invention comprises a light-passing board 20, the exiting surface 221 that this light-passing board 20 comprises an incidence surface 223, intersect vertically with incidence surface 223 and with these exiting surface 221 opposed bottom surface 222.Light guide plate 200 of the present invention also comprises a plurality of scattering points 240.These a plurality of scattering points 240 are uniformly distributed in the bottom surface 222 of light-passing board 20, and the material that it adopted is high diverging light material, and its shape can be column, spherical or tetrahedron.These a plurality of scattering points 240 can make light beam generation scattering and the reflection by side direction incident, and broken beam makes the exiting surface 221 even outgoing of light beam by light-passing board 20 at the total reflection condition of light-passing board 20 inside.
Please consult Fig. 4 together, exiting surface 221 is provided with thread projection 230, and this thread projection 230 is irregular distributions.
The spacing of thread projection 230 is less, and fully scattering is from the light of exiting surface 221 outgoing, thereby makes the briliancy homogenising more of emergent ray.
Light guide plate of the present invention is not limited to present embodiment and describes.For example, the light-passing board that is adopted can be the wedge shape light-passing board; Thread projection is that regular distribution is in the light guide plate surface; The size of a plurality of scattering points, density can be along increasing gradually away from the light incident direction.
See also Fig. 5, method for manufacturing light guide plate of the present invention comprises step 90 that master mold makes, forms the step 91 of die, makes the step 92 of wire drawing structure and utilize jet forming method to make the step 93 of light guide plate on die.At first, produce the required master mold of manufacturing light guide plate.Then, on this master mold, produce die.Utilize mechanical grinding machine to make the wire drawing structure on die, this wire drawing structure is even distribution.Again, utilize jet forming method to make light guide plate, the light-passing board shape that wherein forms light guide plate is plate shaped, and material is lucite or glass.
Manufacturing method of light conducting board of the present invention also is included in the step that formed bottom surface of light guide plate forms a plurality of equally distributed scattering points, and wherein the method that is adopted is a printing treatment.The material that this a plurality of scattering point adopted is high diverging light material, and its shape is a column, also can be spherical or tetrahedron.
Manufacturing method of light conducting board of the present invention also has other numerous embodiments, and for example, the light-passing board of making can be the wedge shape light-passing board; The wire drawing structure can be non-homogeneous distribution; The formation method of scattering point also can be used the method for chemical etching or mechanical texture; The size of a plurality of scattering points, density can be along increasing gradually away from the light incident direction.
Claims (10)
1. light guide plate, comprise a light-passing board, this light-passing board comprises that an incidence surface, is used for the exiting surface and the bottom surface with respect to this exiting surface of outgoing beam, it is characterized in that: be distributed with thread projection on this exiting surface, this thread projection is to utilize mechanical grinding machine to obtain with jet forming method after making the wire drawing structure on the light guiding board mould core again, and this thread projection is used for the light of scattering from this exiting surface outgoing.
2. light guide plate as claimed in claim 1 is characterized in that: this thread projection regular distribution is at this exiting surface.
3. light guide plate as claimed in claim 1 is characterized in that: the shape of this light-passing board is plate shaped or wedge shape.
4. light guide plate as claimed in claim 1 is characterized in that: this light guide plate also includes a plurality of scattering points, and these a plurality of scattering point regular distribution are in the bottom surface of light-passing board.
5. light guide plate as claimed in claim 4 is characterized in that: the size of these a plurality of scattering points, density increase or evenly distribution along a direction gradually in the bottom surface of light-passing board.
6. manufacturing method of light conducting board, it may further comprise the steps: make master mold; In master mold, form die; On die, make the wire drawing structure; Utilize jet forming method to make light guide plate.
7. method for manufacturing light guide plate as claimed in claim 6 is characterized in that: the wire drawing structure on this die is to utilize mechanical grinding machine to make.
8. method for manufacturing light guide plate as claimed in claim 6 is characterized in that: this wire drawing structure is a regular distribution.
9. method for manufacturing light guide plate as claimed in claim 6 is characterized in that: this method for manufacturing light guide plate also is included in the step of a plurality of scattering points that the bottom surface formation rule of produced light guide plate distributes.
10. method for manufacturing light guide plate as claimed in claim 9 is characterized in that: these a plurality of scattering points are to adopt printing treatment method or chemical method for etching to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310117597XA CN100395611C (en) | 2003-12-20 | 2003-12-20 | Light conducting plate and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310117597XA CN100395611C (en) | 2003-12-20 | 2003-12-20 | Light conducting plate and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1629692A CN1629692A (en) | 2005-06-22 |
| CN100395611C true CN100395611C (en) | 2008-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200310117597XA Expired - Fee Related CN100395611C (en) | 2003-12-20 | 2003-12-20 | Light conducting plate and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100395611C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100454101C (en) * | 2005-09-21 | 2009-01-21 | 鸿富锦精密工业（深圳）有限公司 | light guide plate |
| JP5545068B2 (en) * | 2010-06-25 | 2014-07-09 | ソニー株式会社 | Light source device and stereoscopic display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09101521A (en) * | 1995-10-06 | 1997-04-15 | Shin Etsu Polymer Co Ltd | Light transmission body for surface light source and its production |
| CN2496052Y (en) * | 2001-04-13 | 2002-06-19 | 宋义 | Improved, uniform and high efficiency side lighting type back light source |
| CN1379270A (en) * | 2001-04-05 | 2002-11-13 | 住友化学工业株式会社 | Light conducting plate |
| CN1453610A (en) * | 2002-04-23 | 2003-11-05 | 诠兴开发科技股份有限公司 | Manufacturing method of light guide plate mold |
| CN2613768Y (en) * | 2003-04-21 | 2004-04-28 | 鸿富锦精密工业（深圳）有限公司 | Lighting guiding board and area source |
-
2003
- 2003-12-20 CN CNB200310117597XA patent/CN100395611C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09101521A (en) * | 1995-10-06 | 1997-04-15 | Shin Etsu Polymer Co Ltd | Light transmission body for surface light source and its production |
| CN1379270A (en) * | 2001-04-05 | 2002-11-13 | 住友化学工业株式会社 | Light conducting plate |
| CN2496052Y (en) * | 2001-04-13 | 2002-06-19 | 宋义 | Improved, uniform and high efficiency side lighting type back light source |
| CN1453610A (en) * | 2002-04-23 | 2003-11-05 | 诠兴开发科技股份有限公司 | Manufacturing method of light guide plate mold |
| CN2613768Y (en) * | 2003-04-21 | 2004-04-28 | 鸿富锦精密工业（深圳）有限公司 | Lighting guiding board and area source |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1629692A (en) | 2005-06-22 |
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Granted publication date: 20080618 Termination date: 20151220 |
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| EXPY | Termination of patent right or utility model |