CN103901523A - Light guide plate - Google Patents
Light guide plate Download PDFInfo
- Publication number
- CN103901523A CN103901523A CN201210577726.2A CN201210577726A CN103901523A CN 103901523 A CN103901523 A CN 103901523A CN 201210577726 A CN201210577726 A CN 201210577726A CN 103901523 A CN103901523 A CN 103901523A
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- China
- Prior art keywords
- guide plate
- light guide
- light
- curved surface
- circular arc
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Abstract
The invention relates to a light guide plate. The light guide plate comprises a light incidence surface, a light emergence surface, a bottom surface arranged opposite to the light emergence surface and net points arranged on the bottom surface, the net points comprise a first curved surface and a second curved surface, and two flat surfaces located on the first curved surface and the second curved surface, the first curved surface reflects light incident thereto to the light emergence surface with an angle vertical to the light emergence surface, the second curved surface radiates light incident thereto back to the inside of the light guide plate, and the two flat surfaces reflect and radiate light incident thereto to two sides of an initial incidence path of the light incident to the flat surfaces. The light guide plate has the advantages of both having relatively good luminance and uniformity.
Description
Technical field
The present invention relates to the light guide plate that a kind of back light system is used, relate in particular to a kind of light guide plate of tool network point distribution.
Background technology
Because the liquid crystal of panel of LCD itself is not had a characteristics of luminescence, thereby, for reaching display effect, need provide a planar light source device to panel of LCD, as back light system, its role is to area source abundant to panel of LCD supply briliancy and that be evenly distributed.The back light system of prior art is mainly made up of light source, light guide plate.This light source can be arranged at light guide plate one side or two opposite sides and by light emission to this light guide plate.The effect of this light guide plate is to guide light transmission direction, makes the exiting surface uniform of light by light guide plate.For increasing light extraction efficiency and the homogeneity of light guide plate, conventionally in the one side of light guide plate, V-shaped groove or configuration site are set, the distance that this V-shaped groove or site distribute in light guide plate has different designs with large I.When light transmission is during to V-shaped groove or site, will there is reflection and scattering in light, and to each different directions transmission, finally be penetrated by the exiting surface of light guide plate.Utilize various density, the V-shaped groove varying in size or site, can make light guide plate luminous evenly.
Because light guide plate is by light scattering as much as possible, makes the light various direction of directive dispersedly via light guide plate conduction, thereby inevitably produce the defect that is dispersed the briliancy deficiency causing because of light.
Conventionally, for overcoming the defect of briliancy deficiency, the exiting surface of this light guide plate is also provided with prism plate, the refraction action of prism plate can be assembled light to light guide plate dead ahead, to promote the briliancy of light guide plate, but, the structure that is arranged so that of this kind of prism plate increased with regard to the number of elements of the back light system of more complicated originally, be unfavorable for lightweight, the slimming design of back light system, and, the convergence of rays effect of prism also may cause the homogeneity of light guide plate to maintain, and affects the quality of back light system.
Summary of the invention
In view of this, be necessary to provide one can make to have concurrently better briliancy and inhomogeneity light guide plate.
A kind of light guide plate, the bottom surface that it comprises incidence surface, exiting surface, be oppositely arranged with exiting surface and be arranged on the site on bottom surface, this site comprises first surface and the second curved surface, and be positioned at two tabular surfaces of first surface and the second curved surface, this first surface by be incident to light on it with the angle reflection perpendicular to exiting surface to exiting surface, this second curved surface will be incident to the divergence of beam on it and be reflected back light guide plate inside, and these two tabular surfaces will be incident to the light reflection on it and be dissipated into this both sides that are incident to the initial incident path of the light of tabular surface.
Light guide plate provided by the invention, its first surface guiding light vertical sand shooting to light guide plate exiting surface to promote light guide plate briliancy, its the second curved surface divergent rays to multiple different directions have homogeneity to guarantee light guide plate, its tabular surface is by the extremely initial incident path of divergence of beam both sides, further promote the homogeneity of light guide plate effectively to increase the diversified direction of emergent ray, thereby this light guide plate can have better briliancy and homogeneity concurrently.
Accompanying drawing explanation
Fig. 1 is the light guide plate perspective view that the embodiment of the present invention provides.
Fig. 2 is the light guide plate vertical view that the embodiment of the present invention provides.
Fig. 3 is the light guide plate mesh point reflection ray schematic diagram that the embodiment of the present invention provides.
Main element symbol description
| |
10 |
| Incidence surface | 100 |
| Exiting surface | 102 |
| |
104 |
| Depression | 13 |
| Interior circular arc | 131 |
| |
132 |
| |
133 |
| First surface | 14 |
| Bottom margin | 140 |
| The second curved surface | 15 |
| Tabular surface | 16 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of light guide plate 10 that the embodiment of the present invention provides comprises multiple sites disposed thereon.
This light guide plate 10 is made up of light transmissive material, and it comprises incidence surface 100, exiting surface 102 and the bottom surface 104 being oppositely arranged with exiting surface 102.
This site is arranged on bottom surface 104, for being reflected into the light being incident upon on it.In the present embodiment, this site is the multiple depressions 13 that are formed on bottom surface 104.
Each 13 openings that form on bottom surface 104 that cave in are for fan ring-type, and this fan ring comprises that interior circular arc 131, radius that radius is less are greater than the external arc 132 of interior circular arc 131 and connect two straight lines 133 of interior circular arc 131 and external arc 132.
Four sidewalls of this depression 13 are respectively a first surface 14, the second curved surfaces 15 and two tabular surfaces 16.
The part that this first surface 14 is frustum cone side, its circle take interior circular arc 131 places is as round platform end face is towards inner extension of entity of light guide plate 10, and this first surface 14 forms a bottom margin 140 in the bottom of depression 13, this bottom margin 140 is positioned on the bottom surface of round platform, and the bottom surface diameter of these bottom margin 140 round platforms of living in is greater than the diameter of interior circular arc 131 round platform end face of living in.
This second curved surface 15 is arcwall face, it is extended to the bottom margin 140 of first surface 14 by the external arc 132 of fanning ring, thereby this second curved surface 15 crosses at bottom margin 140 places with first surface 14, and this second curved surface 15 caves in towards light guide plate 10 entity inside (, towards the direction away from first surface 14).
These two tabular surfaces 16 extend to bottom margin 140 by two straight lines 133 of fan ring respectively.
Referring to Fig. 3, in the time that this light guide plate 10 is worked, enter from the light forward of light source in the one in four sidewalls that can be incident to depression 13 after the incidence surface 100 of light guide plate 10, wherein: the light being incident on first surface 14 will be reflected into as vertical sand shooting is to the light of exiting surface 102; Being incident to light on the second curved surface 15 will be reflected and disperse the light becoming along multiple different directions directive exiting surfaces 102, be incident to two light on tabular surface 16 and will reflect and be dissipated into the both sides continuation propagation forward of initial incident path, thereby continue outgoing again after light guide plate 10 inside are by multiple reflections, to increase the diversified exit direction of light of directive exiting surface 102, further promote the homogeneity of light guide plate 10.
So, be directed to vertical sand shooting and be positioned to the light of exiting surface 102 dead ahead of light guide plate light direction under the reflex of first surface 14, this part light can effectively improve the briliancy of light guide plate 10; Under the reflex of the second curved surface 15, dispersed to the light of multiple different directions and can effectively be guaranteed that light guide plate 10 has predetermined homogeneity; And under the reflex of tabular surface 16, be dissipated into the light of initial incident path both sides, to continue outgoing again after light guide plate 10 inside are by multiple reflections, can effectively increase the diversified direction of emergent ray, further promote the homogeneity of light guide plate 10, thereby this light guide plate 10 can have better briliancy and homogeneity concurrently.
Preferably, for improving the reflectivity of first surface 14, the second curved surface 15 and two tabular surfaces 16, in this enforcement, on first surface 14, the second curved surface 15 and two tabular surfaces 16, all scribble reflectorized material (not shown).
It should be noted that, depression 13 in the present embodiment also can adopt reflection block to replace, thereby described first surface 14, the second curved surface 15 and two 16 of tabular surfaces are set to reflect four sides of block, and the bottom surface of this reflection block is set to bottom surface of light guide plate 104 coplanar simultaneously.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.
Claims (8)
1. a light guide plate, it comprises incidence surface, exiting surface, the bottom surface being oppositely arranged with exiting surface and be arranged on the site on bottom surface, it is characterized in that: this site comprises first surface and the second curved surface, and be positioned at two tabular surfaces of first surface and the second curved surface, this first surface by be incident to light on it with the angle reflection perpendicular to exiting surface to exiting surface, this second curved surface will be incident to the divergence of beam on it and be reflected back light guide plate inside, these two tabular surfaces will be incident to the light reflection on it and be dissipated into this both sides that are incident to the initial incident path of the light of tabular surface.
2. light guide plate as claimed in claim 1, is characterized in that, this site is the depression being formed on bottom surface of light guide plate.
3. light guide plate as claimed in claim 2, is characterized in that, this is recessed in the opening forming on bottom surface is fan ring-type, and this fan ring comprises that interior circular arc, radius are greater than the external arc of interior circular arc and connect two straight lines of interior circular arc and external arc.
4. light guide plate as claimed in claim 3, it is characterized in that, this first surface is a part for frustum cone side, and this second curved surface is arcwall face, and the end face of this first surface round platform of living in is positioned on bottom surface of light guide plate and this first surface is extended towards light guide plate inside by the circular arc of fanning ring; This second curved surface is extended to the bottom margin of first surface by the external arc of fanning ring, and this second curved surface is towards light guide plate entity inner recess, and these two tabular surfaces are extended to respectively the intersection of first surface and the second curved surface by two straight lines of fan ring.
5. light guide plate as claimed in claim 4, is characterized in that, on this first surface, the second curved surface and two tabular surfaces, all scribbles reflectorized material.
6. light guide plate as claimed in claim 1, is characterized in that, this site is the reflection block being embedded on bottom surface of light guide plate.
7. light guide plate as claimed in claim 6, it is characterized in that, bottom surface and the bottom surface of light guide plate of this reflex block are coplanar, and the bottom surface of this reflex block is fan ring-type, and this fan ring comprises that interior circular arc, radius are greater than the external arc of interior circular arc and connect two straight lines of interior circular arc and external arc.
8. light guide plate as claimed in claim 7, it is characterized in that, this first surface is a part for frustum cone side, and this second curved surface is arcwall face, and the end face of this first surface round platform of living in is positioned on bottom surface of light guide plate and this first surface is extended towards light guide plate inside by the circular arc of fanning ring; This second curved surface is extended to the bottom margin of first surface by the external arc of fanning ring, and this second curved surface is towards light guide plate entity internal protrusion, and these two tabular surfaces are extended to respectively the intersection of first surface and the second curved surface by two straight lines of fan ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210577726.2A CN103901523A (en) | 2012-12-27 | 2012-12-27 | Light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210577726.2A CN103901523A (en) | 2012-12-27 | 2012-12-27 | Light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103901523A true CN103901523A (en) | 2014-07-02 |
Family
ID=50992964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210577726.2A Pending CN103901523A (en) | 2012-12-27 | 2012-12-27 | Light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103901523A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678701A (en) * | 2015-11-09 | 2017-05-17 | 南京德朔实业有限公司 | Illuminating device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040042753A1 (en) * | 2002-05-17 | 2004-03-04 | Steenblik Richard A. | Planar optical waveguide |
| CN1543549A (en) * | 2001-07-19 | 2004-11-03 | 固态奥普托有限公司 | Light redirecting films and film systems |
| CN1710472A (en) * | 2004-06-19 | 2005-12-21 | 鸿富锦精密工业（深圳）有限公司 | Backlight module group and its ligh-guide plate |
| TW200925681A (en) * | 2007-12-07 | 2009-06-16 | Au Optronics Corp | Light guide plate with spring-shaped light-guiding units for use in a liquid crystal display device |
| TW201017242A (en) * | 2008-10-30 | 2010-05-01 | Coretronic Corp | Light guide plate and backlight module |
| CN102621622A (en) * | 2011-01-26 | 2012-08-01 | 中强光电股份有限公司 | Light guide plate and light source module |
-
2012
- 2012-12-27 CN CN201210577726.2A patent/CN103901523A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1543549A (en) * | 2001-07-19 | 2004-11-03 | 固态奥普托有限公司 | Light redirecting films and film systems |
| US20040042753A1 (en) * | 2002-05-17 | 2004-03-04 | Steenblik Richard A. | Planar optical waveguide |
| CN1710472A (en) * | 2004-06-19 | 2005-12-21 | 鸿富锦精密工业（深圳）有限公司 | Backlight module group and its ligh-guide plate |
| TW200925681A (en) * | 2007-12-07 | 2009-06-16 | Au Optronics Corp | Light guide plate with spring-shaped light-guiding units for use in a liquid crystal display device |
| TW201017242A (en) * | 2008-10-30 | 2010-05-01 | Coretronic Corp | Light guide plate and backlight module |
| CN102621622A (en) * | 2011-01-26 | 2012-08-01 | 中强光电股份有限公司 | Light guide plate and light source module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678701A (en) * | 2015-11-09 | 2017-05-17 | 南京德朔实业有限公司 | Illuminating device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140702 |