CN100403110C - Light guide board - Google Patents
Light guide board Download PDFInfo
- Publication number
- CN100403110C CN100403110C CNB2004100513475A CN200410051347A CN100403110C CN 100403110 C CN100403110 C CN 100403110C CN B2004100513475 A CNB2004100513475 A CN B2004100513475A CN 200410051347 A CN200410051347 A CN 200410051347A CN 100403110 C CN100403110 C CN 100403110C
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- light guide
- guide plate
- vee
- material layer
- light
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- Planar Illumination Modules (AREA)
Abstract
The present invention relates to a light conducting plate which comprises a base plate and a refraction material layer, wherein the base plate comprises a bottom face and a surface. The bottom face is provided with a plurality of V-shaped grooves, the fluctuating heights of the tops of the V-shaped grooves are different, and the surface is provided with groove arrays. The refractive index of the refraction material layer is greater than the refractive index of the base plate. The surface is arranged oppositely to the bottom face, and the refraction material layer is arranged on the surface. The light conducting plate has high light emitting brightness, and can control the emitting direction of light rays.
Description
[technical field]
The invention relates to a kind of light guide plate that is used for liquid crystal indicator.
[background technology]
Advantage such as that liquid crystal indicator has is frivolous, little power consumption, radiation are low is widely used in electronic display units such as notebook computer, mobile phone, electronic dictionary, LCD TV.Along with the continuous development of lcd technology and apply, variation has also taken place in its environment for use in recent years, constantly increases in the frequency of outdoor application, and people also improve constantly visual demand, and hope can be developed the higher liquid crystal indicator of brightness.
In recent years, the module invention backlight that improves emitting brightness constantly is suggested, and wherein a kind of prior art module backlight can be consulted disclosed TOHKEMY 2004-111384 communique on April 8th, 2004.As shown in Figure 1, this module 1 backlight comprises a light guide plate 2 and a light source 3, and this light guide plate 2 comprises an exiting surface 4 and a bottom surface 5, and this bottom surface 5 has a plurality of grooves 6 along circular-arc arrangement, the top 7 of these a plurality of grooves 6 is at conplane circular arc, and this plane parallel is in this bottom surface 5.
The texture ratio of a plurality of grooves 6 of this light guide plate 2 is than homogeneous, light incides the incident angle difference of these a plurality of grooves 6, the part light that is incident to this groove 6 passes through exiting surface 4 outgoing of the reflection of this groove 6 from light guide plate 2, part light loses because of less bottom surface 5 outgoing that take place to reflect from light guide plate 2 on groove 6 of incident angle, and its emitting brightness is lower.
In this module 1 backlight, the direct of travel of the difficult control incident ray of the homogeneous structural of this groove 6, light is via light guide plate 2 outgoing, its visual angle secundly, after diffusion sheet is with divergence of beam, via a slice or two prismatic lenses light is concentrated again, do collocation with the visual angle of liquid crystal panel, usually its arranging effect is relatively poor, and cost is higher.
[summary of the invention]
In order to overcome the low problem of prior art light guide plate emitting brightness, the invention provides a kind of emitting brightness height, the light guide plate of may command beam projecting direction.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of light guide plate is provided, this light guide plate comprises a substrate and a refractive material layer, this substrate comprises a bottom surface and a surface, this bottom surface has a plurality of vee-cuts, the fluctuating at this vee-cut top is highly different, this surface has groove array, the refractive index of this refractive material layer is greater than the refractive index of this substrate, this surface and this bottom surface are oppositely arranged, this refractive material layer is arranged on this surface, and this refractive material layer is concordant with this groove array.
Compare with prior art, the invention has the beneficial effects as follows: the vee-cut top of light guide plate of the present invention rises and falls highly different, the fluctuating height change at this top, the incident angle that is incident to this vee-cut light is changed, control is incident to the incident angle of this vee-cut light, make incident angle after the total reflection of this vee-cut, incide this surface, be incident to from this surperficial groove array and be arranged at this surperficial refractive material layer greater than the light of critical angle.Because the refractive index of this refractive material layer is greater than the refractive index of this substrate, so, part light is directly outgoing from this refractive material layer, total reflection takes place in part light on the interface of this refractive material layer and this Surface Groove array, light is converged, make light see through the whole outgoing of this refractive material layer.A part of light less than critical angle incides this surface after the reflection of this vee-cut, a part of light incides next vee-cut and is recovered utilization after refraction, light can not slatterned because of refraction, improves the emitting brightness of light guide plate.
This light guide plate also can change the fluctuating height at this vee-cut top, and control is incident to the reflection direction of this vee-cut light, makes light be incident to this surface, sees through this surperficial groove array, is incident in this refractive material layer.Part light is directly outgoing from this refractive material layer, and part light on the interface of this refractive material layer and this Surface Groove array total reflection takes place, this groove array may command light converge direction.At last, make light see through this refractive material layer, do collocation, control beam projecting direction with liquid crystal panel all from the view directions outgoing of forward or liquid crystal panel.
[description of drawings]
Fig. 1 is the synoptic diagram of a kind of prior art module backlight.
Fig. 2 is the vertical view of light guide plate first embodiment of the present invention.
Fig. 3 is the upward view of light guide plate first embodiment of the present invention.
Fig. 4 is the side view of light guide plate first embodiment of the present invention.
Fig. 5 is the sectional perspective enlarged diagram of the vee-cut of light guide plate first embodiment of the present invention.
Fig. 6 is the partial top view at the vee-cut top of light guide plate first embodiment of the present invention.
Fig. 7 is the partial elevation view at the vee-cut top of light guide plate first embodiment of the present invention.
Fig. 8 is the upward view of light guide plate second embodiment of the present invention.
Fig. 9 is the side view of light guide plate second embodiment of the present invention.
Figure 10 is the sectional perspective enlarged diagram of the vee-cut of light guide plate second embodiment of the present invention.
Figure 11 is the vertical view of light guide plate the 3rd embodiment of the present invention.
Figure 12 is the sectional perspective enlarged diagram of the vee-cut of light guide plate the 3rd embodiment of the present invention.
Figure 13 is the upward view of light guide plate the 4th embodiment of the present invention.
Figure 14 is the sectional perspective enlarged diagram of the vee-cut of light guide plate the 4th embodiment of the present invention.
Figure 15 is the vertical view of light guide plate the 5th embodiment of the present invention.
Figure 16 is the upward view of light guide plate the 5th embodiment of the present invention.
Figure 17 is the side view of light guide plate the 5th embodiment of the present invention.
Figure 18 is the upward view of light guide plate the 6th embodiment of the present invention.
[embodiment]
Please together consult Fig. 2, Fig. 3 and Fig. 4, Fig. 2 is the vertical view of light guide plate first embodiment of the present invention, and Fig. 3 is the upward view of light guide plate first embodiment of the present invention, and Fig. 4 is the side view of light guide plate first embodiment of the present invention.This light guide plate 10 comprises a substrate 11 and a refractive material layer 12, this substrate 11 comprises a bottom surface 13 and a surface 14, and this bottom surface 13 has a plurality of vee-cuts 15, and the fluctuating at the top 16 of this vee-cut 15 is highly different, this surface 14 has groove array 17, the refractive index n of this refractive material layer 12
1Refractive index n greater than this substrate 11
2, this surface 14 is oppositely arranged with this bottom surface 13, and this refractive material layer 12 is arranged on this surface 14.
This light guide plate 10 also comprises an incidence surface 18, and this incidence surface 18 is a corner of this light guide plate 10.This refractive material layer 12 is concordant with this groove array 17.This groove array 17 is triangular groove arrays, the angle α that a side 141 on the groove base of this groove array 17 and this surface 14 forms
1Be 40 degree, and evenly distributed on this surface 14.These a plurality of vee-cuts 15 are that the center roughly is the concentric circles arcuation and distributes with this incidence surface 18, these a plurality of vee-cuts 15 with away from incidence surface 18 by dredging to the solid matter row, and the fluctuating at this a plurality of vee-cuts 15 tops 16 is highly with arranging from low to high away from incidence surface 18.
See also Fig. 5, Fig. 6 and Fig. 7, Fig. 5 is the sectional perspective enlarged diagram of the vee-cut 15 of light guide plate first embodiment of the present invention, Fig. 6 is the partial top view at vee-cut 15 tops 16 of light guide plate first embodiment of the present invention, and Fig. 7 is the partial elevation view at vee-cut 15 tops 16 of light guide plate first embodiment of the present invention.The top 16 of this vee-cut 15 is three-dimensional curves, and this top 16 is to a plurality of direction bendings.The degree of depth W and the tilt length P of the incident curved surfaces 19 of this vee-cut 15 are different, and the fluctuating height H and the corrugation pitch L at these vee-cut 15 tops 16 are different, and two bases 151 of these a plurality of vee-cuts 13 are the identical two-dimensional curves of two shapes.
The top 16 of this light guide plate 10V shape groove 15 rises and falls highly different, change degree of depth W, the tilt length P of incident curved surfaces 19, the fluctuating height H and the corrugation pitch L at these vee-cut 15 tops 16 of the incident curved surfaces 19 of this vee-cut 15, can change the size of this vee-cut 15 drift angle Θ, control is incident to the incident angle of these vee-cut 15 light, make incident angle after the total reflection of this vee-cut 15, incide this surface 14, be incident to the refractive material layer 12 that is arranged at this surface 14 from the groove array 17 on this surface 14 greater than the light of critical angle.Refractive index n because of this refractive material layer 12
1Refractive index n greater than this substrate 11
2Gu part light is directly outgoing from this refractive material layer 12, total reflection takes place in part light on the interface of this refractive material layer 12 and these surface 14 groove arrays 17, light is converged, and makes light see through this refractive material layer 12 whole outgoing.A part of light less than critical angle incides this surface 14 after the reflection of this vee-cut 15, a part of light incides next vee-cut and is recovered utilization after refraction, light can not slatterned because of refraction, improves the emitting brightness of light guide plate 10.
This light guide plate 10 also can change the fluctuating height at these vee-cut 15 tops 16, and control is incident to the reflection direction of these vee-cut 15 light, makes light be incident to this surface 14, sees through the groove array 17 on this surface 14, is incident in this refractive material layer 12.Part light is directly outgoing from this refractive material layer 12, and part light on the interface of this refractive material layer 12 and these surface 14 groove arrays 17 total reflection takes place.Control the angle α that the side 141 on the groove base of this groove array 17 and this surface 14 forms
1Angle changes the drift angle angle of this groove array 17 and its groove pitch, may command light converge direction.At last, make light see through this refractive material layer 12, do collocation, control beam projecting direction with liquid crystal panel all from the view directions outgoing of forward or liquid crystal panel.
See also Fig. 8 and Fig. 9, Fig. 8 is the upward view of light guide plate second embodiment of the present invention, and Fig. 9 is the side view of light guide plate second embodiment of the present invention.The difference of this light guide plate 20 and the first embodiment light guide plate 10 is: the angle (figure does not show) that the groove base of this groove array 27 and a side on this surface 24 (figure does not show) form is 45 degree.These a plurality of vee-cuts 25 are that the center is the concentric circles arcuation and distributes with this incidence surface 28, and this a plurality of vee-cut 25 is evenly distributed on this bottom surface 23.
Seeing also Figure 10, is the sectional perspective enlarged diagram of the vee-cut of light guide plate second embodiment of the present invention.This vee-cut 25 is with the difference of the first embodiment vee-cuts 15: this top 26 is positioned on the cambered surface vertical with this bottom surface 23, and bending up and down, and two bases 251 of these a plurality of vee-cuts 25 are two isocentric circular arc.
See also Figure 11 and Figure 12, Figure 11 is the vertical view of light guide plate the 3rd embodiment of the present invention, and Figure 12 is the sectional perspective enlarged diagram of the vee-cut of light guide plate the 3rd embodiment of the present invention.The difference of this light guide plate 30 and the second embodiment light guide plate 20 is: the angle α that a side 341 on the groove base of this groove array 37 and this surface 34 forms
3Be 50 degree.Swell to the centre gradually from two ends at the top 36 of this vee-cut 35.
See also Figure 13 and Figure 14, Figure 13 is the upward view of light guide plate the 4th embodiment of the present invention, and Figure 14 is the sectional perspective enlarged diagram of the vee-cut of light guide plate the 4th embodiment of the present invention.The difference of this light guide plate 40 and the second embodiment light guide plate 20 is: the top 46 of this vee-cut 45 is two-dimensional curves, and be positioned on the plane vertical with this bottom surface 43, the base 451 of these a plurality of vee-cuts 45 be two with this parallel plane parallel lines in 46 places, top, and with angled being arranged in parallel in a side of this light guide plate 40.
Please together consult Figure 15, Figure 16 and Figure 17, Figure 15 is the vertical view of light guide plate the 5th embodiment of the present invention, and Figure 16 is the upward view of light guide plate the 5th embodiment of the present invention, and Figure 17 is the side view of light guide plate the 5th embodiment of the present invention.This light guide plate 50 is with the difference of the first embodiment light guide plate 10: this incidence surface 58 is a side of this light guide plate 50.This groove array 57 is arc-shaped groove arrays, the angle α that a side 541 on the groove base of this groove array 57 and this surface 54 forms
5Be 90 degree, these a plurality of vee-cuts 55 are arranged on the direction parallel with this incidence surface 58 continuously.
Seeing also Figure 18, is the intention of facing upward of light guide plate the 6th embodiment of the present invention.This light guide plate 60 is with the difference of the 4th embodiment light guide plate 40: this incidence surface 68 is a side of this light guide plate 60.These a plurality of vee-cuts 65 are arranged on the direction parallel with this incidence surface 68 continuously.
It is described that light guide plate of the present invention is not limited to present embodiment, two bases as this vee-cut of this light guide plate also can be the different curve of two strips, and the angle angle that the groove base of this groove array and a side on this surface form is arbitrarily angled between 40～50 and 85～95 degree also.
Claims (7)
1. light guide plate, comprise a substrate, this substrate comprises a bottom surface and one and the surface that is oppositely arranged, this bottom surface, this bottom surface is formed with a plurality of vee-cuts, it is characterized in that: the fluctuating at this vee-cut top is highly different, and this surface has groove array, and this light guide plate comprises that also one is arranged at this lip-deep refractive material layer, this refractive material layer is concordant with this groove array, and the refractive index of this refractive material layer is greater than the refractive index of this substrate.
2. light guide plate according to claim 1 is characterized in that: this groove array is triangle or arc-shaped groove array.
3. light guide plate according to claim 1 is characterized in that: this groove array is evenly distributed in this surface.
4. light guide plate according to claim 1 is characterized in that: the groove base of this groove array and a side on this surface form the angle of a size between 40～50 degree or 85～95 degree.
5. light guide plate according to claim 1 is characterized in that: this vee-cut top is two-dimensional curve or three-dimensional curve.
6. light guide plate according to claim 1 is characterized in that: the corrugation pitch that this top rises and falls is different.
7. light guide plate according to claim 1 is characterized in that: these a plurality of vee-cuts are listed as by dredging to solid matter along a direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100513475A CN100403110C (en) | 2004-08-31 | 2004-08-31 | Light guide board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100513475A CN100403110C (en) | 2004-08-31 | 2004-08-31 | Light guide board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1743911A CN1743911A (en) | 2006-03-08 |
| CN100403110C true CN100403110C (en) | 2008-07-16 |
Family
ID=36139349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100513475A Expired - Fee Related CN100403110C (en) | 2004-08-31 | 2004-08-31 | Light guide board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100403110C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016098985A1 (en) * | 2014-12-15 | 2016-06-23 | Samsung Electronics Co., Ltd. | Backlight apparatus and display apparatus having the same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133266B (en) * | 2014-08-20 | 2017-08-25 | 上海向隆电子科技有限公司 | Light guide plate with part of trench |
| JP6478050B2 (en) * | 2015-05-15 | 2019-03-06 | パナソニックＩｐマネジメント株式会社 | Surface light source lighting device |
| CN108169949A (en) * | 2016-12-07 | 2018-06-15 | 群创光电股份有限公司 | Show equipment |
| CN108387968A (en) * | 2018-03-23 | 2018-08-10 | 上海徕尼智能科技有限公司 | A kind of backlight module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000305073A (en) * | 1999-04-22 | 2000-11-02 | Mitsubishi Electric Corp | Backlight for liquid crystal display device |
| CN1378632A (en) * | 1999-10-08 | 2002-11-06 | 3M创新有限公司 | Optical element having programmed optical structures |
| CN1388400A (en) * | 2001-05-30 | 2003-01-01 | 恩普乐股份有限公司 | Light conducting plate, area source device and liquid crystal display device |
| US20030090888A1 (en) * | 2001-11-15 | 2003-05-15 | Minebea Co., Ltd. | Spread illuminating apparatus without light conductive bar |
| US20030117793A1 (en) * | 2001-12-24 | 2003-06-26 | Shin Hyun Ho | Backlight unit |
-
2004
- 2004-08-31 CN CNB2004100513475A patent/CN100403110C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000305073A (en) * | 1999-04-22 | 2000-11-02 | Mitsubishi Electric Corp | Backlight for liquid crystal display device |
| CN1378632A (en) * | 1999-10-08 | 2002-11-06 | 3M创新有限公司 | Optical element having programmed optical structures |
| CN1388400A (en) * | 2001-05-30 | 2003-01-01 | 恩普乐股份有限公司 | Light conducting plate, area source device and liquid crystal display device |
| US20030090888A1 (en) * | 2001-11-15 | 2003-05-15 | Minebea Co., Ltd. | Spread illuminating apparatus without light conductive bar |
| US20030117793A1 (en) * | 2001-12-24 | 2003-06-26 | Shin Hyun Ho | Backlight unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016098985A1 (en) * | 2014-12-15 | 2016-06-23 | Samsung Electronics Co., Ltd. | Backlight apparatus and display apparatus having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1743911A (en) | 2006-03-08 |
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Granted publication date: 20080716 Termination date: 20160831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |