CN100395564C - Light conducting plate and its producing method - Google Patents
Light conducting plate and its producing method Download PDFInfo
- Publication number
- CN100395564C CN100395564C CNB021606579A CN02160657A CN100395564C CN 100395564 C CN100395564 C CN 100395564C CN B021606579 A CNB021606579 A CN B021606579A CN 02160657 A CN02160657 A CN 02160657A CN 100395564 C CN100395564 C CN 100395564C
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- guide plate
- light guide
- arc
- light
- shaped surface
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- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
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Abstract
The present invention relates to a light guiding plate which comprises an incident surface, a bottom surface and an emergent surface, wherein the incident surface is used for receiving an incident light beam from the outside, the bottom surface is used for scattering and reflecting the incident light beam, and the emergent surface leads out the light beam which is scattered and reflected by the bottom surface; the emergent surface of the light guiding plate forms a plurality of circular arc curved surfaces which are distributed regularly. The circular arc curved surfaces have a certain light converging function and can enhance the light emergent brightness of the light guiding plate.
Description
[technical field]
The present invention relates to a kind of light guide plate and manufacture method thereof, particularly a kind of light guide plate and manufacture method thereof with higher bright dipping briliancy.
[background technology]
Liquid crystal display systems is a kind of non-self-emission display apparatus, it shows mainly passing through or the obstructed realization of coming by control light beam that external light source sends, therefore need corresponding backlight or preceding photosystem, this backlight or preceding photosystem can be realized Presentation Function with the beam direction display panel that external light source sent.
Please refer to Fig. 1, is a kind of prior art back light system 100, this back light system 100 comprise a light source 101, a light source cover 102, a reflecting plate 104, a light guide plate 103 and a blast sheet 105 (Brightness Enhance Film, BEF).This light guide plate 103 is roughly plate shaped, and it comprises a plane of incidence 1031, a bottom surface 1032 and an exit facet 1033, and bottom surface 1032 is distributed with a plurality of sites 1034.Wherein this light source 101 is provided with respect to the plane of incidence 1031 of light guide plate 103, this light source cover 102 is positioned at the opposite side of light source 101 relative light guide plate 103, to increase the light intensity of guiding light guide plate 103, this reflecting plate 104, light guide plate 103 and blast sheet 105 stack gradually placement, this blast sheet 105 contiguous light guide plate 103 exit facets 1033 and be positioned at light guide plate 103 with a liquid crystal panel (scheming not show) between.By the light beam that light source 101 sends, this blast sheet 105 of guiding after light guide plate 103 and reflecting plate 104 effects, these blast sheet 105 surfaces are evenly distributed with a plurality of parallel prism structures 1051, and this prism structure 1051 is assembled this light beam and the guiding liquid crystal panel.But because these back light system 100 employing component numbers are more and each element is all discrete, it increases the optical energy loss of light beam boundary reflection, reduce this back light system 100 bright dipping briliancy, and the price of blast sheet 105 is higher, causes these back light system 100 costs higher.
Please refer to Fig. 2, is a kind of back light system 200 that the United States Patent (USP) of on October 31st, 2000 bulletin discloses for the 6th, 139, No. 162, and it comprises a light source 201, one and this light source 201 corresponding light source covers 202 and a light guide plate 203.The exit facet 2031 of this light guide plate 203 is distributed with a plurality of V-arrangement prism structures 2032, and the drift angle value of this V-arrangement prism structure 2032 is roughly the 60-120 degree, and the angle of its best is 90 degree.The a plurality of network point distribution of bottom surface 2033 tools of this light guide plate 203 (figure does not show) also can adopt reflecting plate (figure does not show) or reflecting plate and modes such as the site combines.The light beam that this light source 201 sends enters light guide plate 203, after the scattering of 2033 sites, light guide plate 203 bottom surfaces, reflection, the exit facet 2031 of guiding light guide plate 203, this exit facet 2031 carries out optically focused with this scattering, beam reflected, forms the higher output beam of briliancy.But, this light guide plate 203 is formed in one with the V-arrangement prism structure 2032 of its exit facet 2031, its bright dipping briliancy depends on the drift angle angle of V-arrangement prism structure 2032 and the smoothness on prism inclined-plane, its die permissible accuracy scope is the 1-2 micron, make this kind die and roughly need 7 day time, thereby the cost of this die is higher, thereby improves the manufacturing cost of light guide plate 203 and back light system 200.
[summary of the invention]
Make the deficiency difficult, that cost is high in order to overcome the prior art light guide plate, the invention provides a kind of light guide plate simple, that cost is low of making.
The technical solution adopted for the present invention to solve the technical problems provides a kind of light guide plate, this light guide plate comprises a plane of incidence, a bottom surface and an exit facet, this plane of incidence is used for receiving outside incident beam, this bottom surface is distributed with a plurality of sites, be used for scattering, reflect this incident beam, this exit facet is derived this bottom surface scattering, beam reflected, wherein, the exit facet of this light guide plate forms the arc-shaped surface of a plurality of regular distribution, and this arc-shaped surface is used for and will is incident to the refraction of optical beam of this arc-shaped surface and converges on vertical direction.
Manufacturing method of light conducting board of the present invention may further comprise the steps: die is made; Etching forms the circular arc projection of a plurality of regular distribution on die; Master mold is made; Utilize and penetrate or hot-forming making light guide plate, form a plurality of sites in the bottom surface of the light guide plate of being made.
Compared with prior art, the present invention has the following advantages: because of the even a plurality of arc-shaped surfaces that distribute of the exit facet of light guide plate of the present invention, this arc-shaped surface can effectively improve the briliancy of this exit facet; And the accuracy requirement of die of making this arc-shaped surface is relatively low, more easily realizes with etch process, can save the cost of making light guide plate.
[description of drawings]
Fig. 1 is a kind of three-dimensional exploded view of prior art back light system.
Fig. 2 is the stereographic map of another kind of prior art back light system.
Fig. 3 is the stereographic map of light guide plate of the present invention.
Fig. 4 is the sectional view of light guide plate shown in Figure 3.
Fig. 5 is the index path of the arc-shaped surface of light guide plate amplification shown in Figure 4.
Fig. 6 is the making process flow diagram of light guide plate of the present invention.
[embodiment]
Please refer to Fig. 3 and Fig. 4, be light guide plate 300 of the present invention.This light guide plate 300 is roughly plate shaped, it comprises a plane of incidence 301, a bottom surface 302 and an exit facet 303, this plane of incidence 301 receives the light beam that sidepiece light source (figure does not show) sends, this bottom surface 302 is evenly distributed with a plurality of sites 3032, these bottom surface 302 scatterings, reflect the light beam that this light beam forms even guiding light guide plate 300 exit facets 303, this exit facet 303 forms the arc-shaped surface 3031 of a plurality of regular distribution, this arc-shaped surface 3031 can carry out optically focused to light beam, thereby increases the briliancy of light guide plate 300 exit facets 303 outgoing beams.
Please in the lump with reference to Fig. 5, by bottom surface 302 scatterings, beam reflected 10 with respect to arc-shaped surface 3031 with the incident of α angle, when α angle during less than the angle of total reflection, this light beam 10 through this arc-shaped surface 3031 with the outgoing of β angle.When supposing not have this arc-shaped surface 3031, then the incident angle of these light beam 10 relative light guide plate exit facets 3 (shown in the dotted line) is γ, and when γ angle during less than the angle of total reflection, its emergence angle is η.This light beam 10 by refractive index be the high refractive index medium light guide plate 300 of n (n＞1) to enter refractive index be 1 air dielectric, by formula:
n＝sini/sinω
Wherein, n is the refractive index of high refractive index medium, n＞1, i is an emergence angle, and ω is an incident angle, as can be known, the incident angle α angle of light beam 10 relative arc-shaped surfaces 3031 is less than the incident angle γ of light beam 10 with respect to plane 3, and then the pass at its relative emergence angle β angle and η angle is:
β＜η
The arc-shaped surface 3031 relative exit facets that are light guide plate 300 exit facets 303 are the function of plane tool optically focused in certain ranges of incidence angles, and this certain incident angle depends on the radian of dielectric material and arc-shaped surface 3031.Simultaneously, in designated length L, the radian of this arc-shaped surface 3031 increases gradually, promptly embed light guide plate 300 exit facets 303 depth d when deepening gradually, the emergence angle β of light beam 10 will reduce gradually, when this arc-shaped surface 3031 is hemisphere face, can obtain best spotlight effect.
As above-mentioned light guide plate, it also can be a wedge shape, and its bottom surface is along a plurality of changing from small to big or from sparse to dense site is set away from light guide plate plane of incidence direction.
Please refer to Fig. 6, manufacturing method of light conducting board of the present invention may further comprise the steps: die is made; Etching forms the circular arc projection of a plurality of regular distribution on die; Master mold is made; Utilize the step of ejaculation or hot-forming making light guide plate.At first, make a die.Then, etching forms the circular arc projection of a plurality of regular distribution on this die, and this circular arc projection can be hemisphere face or spherical calotte.Produce and make the required master mold of light guide plate.Again, utilize to penetrate or hot-forming making light guide plate, wherein this light guide plate is roughly plate shapedly, and material is transparent synthetic resin material or glass.
Manufacturing method of light conducting board of the present invention also is included in the step that the bottom surface of light guide plate that forms forms a plurality of even distributions site, and wherein the method that is adopted can be screen painting.The material that adopt this a plurality of site is high diverging light material, and its shape can be column, spherical or tetrahedron.
Manufacturing method of light conducting board of the present invention also has other numerous embodiments.As, the light guide plate of making can be wedge shape; A plurality of sites also can adopt the method for chemical etching or mechanical texture to form; The distribution of a plurality of sites can have various ways, as its size, density can be along increasing gradually away from the plane of incidence.
Claims (8)
1. light guide plate, comprise that a plane of incidence, that is used for receiving the incident beam of outside is used for scattering, reflects the exit facet that bottom surface scattering, beam reflected are derived in the bottom surface and of this incident beam, this bottom surface is distributed with a plurality of sites, it is characterized in that: the exit facet regular distribution of this light guide plate has a plurality of arc-shaped surfaces, and this arc-shaped surface is used for and will is incident to the refraction of optical beam of this arc-shaped surface and converges on vertical direction.
2. light guide plate as claimed in claim 1 is characterized in that: this arc-shaped surface and light guide plate are one-body molded.
3. light guide plate as claimed in claim 2 is characterized in that: the material of this light guide plate is synthetic resin or glass.
4. light guide plate as claimed in claim 2 is characterized in that: this arc-shaped surface is a hemisphere face.
5. light guide plate as claimed in claim 2 is characterized in that: this arc-shaped surface is a spherical calotte.
6. manufacturing method of light conducting board, it may further comprise the steps: die is made; Etching forms the circular arc projection of a plurality of regular distribution on die; Master mold is made; Utilize and penetrate or hot-forming making light guide plate, form a plurality of sites in the bottom surface of the light guide plate of being made.
7. manufacturing method of light conducting board as claimed in claim 6 is characterized in that: the shape of these a plurality of circular arc projections is that semisphere or part are spherical.
8. manufacturing method of light conducting board as claimed in claim 6 is characterized in that: these a plurality of sites can adopt printing treatment method, chemical method for etching or mechanical texture method to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021606579A CN100395564C (en) | 2002-12-27 | 2002-12-27 | Light conducting plate and its producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021606579A CN100395564C (en) | 2002-12-27 | 2002-12-27 | Light conducting plate and its producing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1512200A CN1512200A (en) | 2004-07-14 |
| CN100395564C true CN100395564C (en) | 2008-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021606579A Expired - Fee Related CN100395564C (en) | 2002-12-27 | 2002-12-27 | Light conducting plate and its producing method |
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| CN (1) | CN100395564C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158633B (en) * | 2011-12-19 | 2015-08-26 | 比亚迪股份有限公司 | A kind of mark of motor vehicle |
| CN102297383A (en) * | 2011-08-16 | 2011-12-28 | 东莞雷笛克光学有限公司 | Light source diffusing structure |
| KR101366501B1 (en) * | 2012-09-28 | 2014-02-25 | 엘지디스플레이 주식회사 | Apparatus and method for manufacturing light guide plate |
| CN104571658B (en) * | 2013-10-17 | 2020-03-17 | 鸿富锦精密工业（深圳）有限公司 | Reflective display module and electronic device using same |
| CN108572411A (en) * | 2017-03-09 | 2018-09-25 | 先益电子工业股份有限公司 | Light guide plate, the mode device of moulding light guide plate and its manufacturing method |
| CN110068880A (en) * | 2019-04-28 | 2019-07-30 | 深圳市洲明科技股份有限公司 | Display screen and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07294745A (en) * | 1994-04-25 | 1995-11-10 | Fanuc Ltd | Back light panel |
| JPH09197400A (en) * | 1996-01-23 | 1997-07-31 | Hitachi Ltd | Liquid crystal display device |
| JPH10123329A (en) * | 1996-10-16 | 1998-05-15 | Seiko Epson Corp | Lighting device and liquid crystal display device |
| JP2001051125A (en) * | 1999-08-05 | 2001-02-23 | Nippon Denyo | Light guide plate and plane lighting system |
-
2002
- 2002-12-27 CN CNB021606579A patent/CN100395564C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07294745A (en) * | 1994-04-25 | 1995-11-10 | Fanuc Ltd | Back light panel |
| JPH09197400A (en) * | 1996-01-23 | 1997-07-31 | Hitachi Ltd | Liquid crystal display device |
| JPH10123329A (en) * | 1996-10-16 | 1998-05-15 | Seiko Epson Corp | Lighting device and liquid crystal display device |
| JP2001051125A (en) * | 1999-08-05 | 2001-02-23 | Nippon Denyo | Light guide plate and plane lighting system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1512200A (en) | 2004-07-14 |
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