CN101008683A - Brightening piece and back light module - Google Patents
Brightening piece and back light module Download PDFInfo
- Publication number
- CN101008683A CN101008683A CN 200610007002 CN200610007002A CN101008683A CN 101008683 A CN101008683 A CN 101008683A CN 200610007002 CN200610007002 CN 200610007002 CN 200610007002 A CN200610007002 A CN 200610007002A CN 101008683 A CN101008683 A CN 101008683A
- Authority
- CN
- China
- Prior art keywords
- light
- brightening piece
- curved surface
- emitting face
- stripe prisms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005282 brightening Methods 0.000 title claims description 76
- 238000009792 diffusion process Methods 0.000 claims description 9
- 229910052708 sodium Inorganic materials 0.000 claims description 9
- 239000011734 sodium Substances 0.000 claims description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 8
- 230000001154 acute effect Effects 0.000 claims description 4
- 230000005142 aphototropism Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 13
- 230000002708 enhancing effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 150000003385 sodium Chemical class 0.000 description 1
Images
Abstract
This invention relates to one light enhance slice, which comprises one light exit surface and multiple bar prism at light exit surface in parallel setting, wherein, each bar prism has one light incidence curve surface, one light reflection inclination and one plane; light incidence curve is connected between light reflection inclination and plane relative to the light reflection inclination for outer protruding curve; light reflection inclination is suitable for light incidence beam to send out. This invention provides one light enhance slice aphototropism module set.
Description
[technical field]
The invention relates to a kind of optical element, and particularly (brightness enhancement film is BEF) with the module backlight with this brightening piece relevant for a kind of brightening piece.
[background technology]
Figure l is the synoptic diagram of known module backlight, and Fig. 2 A is the stereographic map of two brightening pieces among Fig. 1, and Fig. 2 B is the synoptic diagram of the light path of light in the brightening piece.Please refer to Fig. 1 and Fig. 2, known module backlight 100 comprises a light source 110, a light guide plate 120, two diffusion sheets (diffuser film) 130a, 130b, two brightening piece 140a, 140b and a reflector plate 150, it is other that wherein light guide plate 120 is disposed at light source 110, and diffusion sheet 130a, 130b and brightening piece 140a, 140b are disposed at light-emitting face 122 tops of light guide plate 120, and brightening piece 140a, 140b are disposed between diffusion sheet 130a, the 130b.
In the above-mentioned module backlight 100, the light 112 that light source 110 is provided is after light-emitting face 122 outgoing of light guide plate 120, can pass through diffusion sheet 130a, brightening piece 140a, brightening piece 140b and diffusion sheet 130b in regular turn, and light 112 is by the parallel haply Z axle of direction of the directive property behind the diffusion sheet 130b.Wherein, brightening piece 140a uses so that the light of Y-Z in-plane is concentrated, and brightening piece 140b uses so that the light of X-Z in-plane is concentrated.
In known techniques, the light that needs to use two brightening piece 140a, 140b just can make Y-Z in-plane and X-Z in-plane is concentrated, and therefore the production cost of module 100 backlight is higher, and thickness is also thicker.In addition,, part light (as light 112 ') injects in the light guide plate 120, so can reduce the brightness of the backlight that module 100 backlight provided owing to producing total reflection easily in brightening piece 140a, 140b.
[summary of the invention]
The purpose of this invention is to provide a kind of brightening piece that promotes light enhancing effect.
Another object of the present invention is to propose a kind of module backlight that reduces production costs.
For reaching above-mentioned purpose, the present invention proposes a kind of brightening piece, it is characterized in that: a plurality of stripe prisms that it has a light-emitting face and is positioned at this light-emitting face opposite side, and these a plurality of stripe prisms are parallel to each other in fact, respectively this stripe prisms has a smooth incident curved surface and a smooth reflecting slant, wherein this light incident curved surface is relative with this light reflecting slant, and this light incident curved surface is outer convex surface, this light reflecting slant will be from the reflection of the light of this light incident curved surface incident, makes the direction of the directive property after this light reflection be parallel to the normal direction of this light-emitting face and penetrates from this light-emitting face.
The present invention proposes a kind of module backlight in addition, it is characterized in that: comprising:
One light source provides a light;
One light guide plate is disposed at by this light source; And
One brightening piece, be disposed at a side of this light guide plate, and this light is this brightening piece of incident via this light guide plate, a plurality of stripe prisms that this brightening piece has a light-emitting face and is positioned at this light-emitting face opposite side, and this each stripe prisms is parallel to each other in fact, respectively this stripe prisms has a smooth incident curved surface and a smooth reflecting slant, wherein this light incident curved surface is relative with this light reflecting slant, and this light incident curved surface is outer convex surface, this light reflecting slant will make this light from this light-emitting face outgoing from the light reflection of this light incident curved surface incident.
In the brightening piece of the present invention,, therefore can improve the light enhancing effect of brightening piece because the light incident curved surface of column prism has preferable light harvesting effect.In addition, module backlight of the present invention only need use a slice brightening piece, therefore not only can reduce production costs, and also can reduce thickness.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
[description of drawings]
Fig. 1 is the synoptic diagram of known module backlight.
Fig. 2 A is the stereographic map of two brightening pieces among Fig. 1.
Fig. 2 B is the synoptic diagram of the light path of light in the known brightening piece.
Fig. 3 is the synoptic diagram of the module backlight of one embodiment of the invention.
Fig. 4 is the stereographic map of brightening piece among Fig. 3.
Fig. 5 is the synoptic diagram of the light path of the light in the stripe prisms of the present invention.
Fig. 6 is the light intensity of light of the present invention after the brightening piece outgoing and the graph of a relation at visual angle.
Fig. 7 is the synoptic diagram of the brightening piece of another embodiment of the present invention.
Fig. 8 is the enlarged drawing of sodium meter level microstructure among Fig. 7.
Fig. 9 is light is passed to the light path of the light-emitting face that disposes microstructure and do not dispose microstructure with equal angular a synoptic diagram.
Figure 10 is the synoptic diagram of the brightening piece of further embodiment of this invention.
[embodiment]
Fig. 3 is the synoptic diagram of the module backlight of one embodiment of the invention, and Fig. 4 is the stereographic map of brightening piece among Fig. 3, and Fig. 5 is the synoptic diagram of the light path of the light in the stripe prisms.Please refer to Fig. 3 to Fig. 5, the module backlight 200 of present embodiment comprises a light source 210, a light guide plate 220 and a brightening piece 300.Wherein, it is other that light guide plate 220 is disposed at light source 210, and brightening piece 300 is disposed at a side of light guide plate 220.A plurality of stripe prisms 320 that brightening piece 300 has a light-emitting face 310 and is positioned at light-emitting face 310 offsides, and these stripe prisms 320 are parallel to each other in fact.In addition, each stripe prisms 320 has a smooth incident curved surface 322 and a smooth reflecting slant 324, and light incident curved surface 322 is relative with light reflecting slant 324, and light incident curved surface 322 is outer convex surface.
In a preferred embodiment, each stripe prisms 320 more comprises a plane 326, and the light incident curved surface 322 of each stripe prisms 320 is to be connected between light reflecting slant 324 and the plane 326.In addition, folded acute angle theta for example is between 50 degree～67.5 degree between the light reflecting slant 324 of above-mentioned stripe prisms 320 and the light-emitting face 310.The proportionality of the radius of curvature R of the breadth extreme p of stripe prisms 320 and light incident curved surface 322 is in this way between 1.3～2, i.e. 1.3≤P/R≤2.In addition, the proportionality of the radius of curvature R of the thickness H of stripe prisms 320 and light incident curved surface 322 is in this way between 1.3～1.7, i.e. 1.3≤H/R≤1.7.
In the above-mentioned module backlight 200, light source 210 can be cold cathode fluorescent lamp pipe, light-emittingdiode or other light sources that is suitable for, and it is suitable for providing a light 212.Light 212 can be via light-emitting face 224 outgoing after light entrance face 222 incidents of light guide plate 220, and from the light incident curved surface 322 incident brightening pieces 300 of stripe prisms 320.After, light 212 can be via the total reflection of the light reflecting slant 324 of stripe prisms 320 from light-emitting face 310 outgoing.Wherein, light incident curved surface 322 can be with light 212 convergences of X-Z in-plane and Y-Z in-plane, and light reflecting slant 324 can make the parallel haply Z axle of the direction of the directive property after light 212 total reflections, and the Z axle is the normal direction of light-emitting face 310 in the present embodiment.In addition, in order further to improve the quality of the backlight that module 200 backlight provided, can dispose a diffusion sheet 230 in brightening piece 300 tops.
Fig. 6 be light after the brightening piece outgoing of present embodiment light intensity and the graph of a relation at visual angle.Please refer to Fig. 5 and Fig. 6, by among Fig. 6 as can be known, from the light 212 of light guide plate 220 outgoing by behind the brightening piece 300, in the angular field of view on the X-Z plane approximately between-16 degree between 16 degree, and in the angular field of view on the Y-Z plane approximately between-8 degree between 8 degree.In addition, on the X-Z plane and the pairing visual angle, strength of the light intensity on Y-Z plane all be about 0 degree, that is light angle distributes strength all in the normal direction (being Z-direction) of light-emitting face 310.Therefore, the brightening piece 300 of present embodiment can improve the center brightness value of the backlight that entire aphototropism mould 200 provided.
Compared to known techniques, because the module backlight 200 of present embodiment only need use a slice brightening piece 300 that the light 212 of X-Z in-plane and Y-Z in-plane is concentrated, so can save the material cost of brightening piece 300, and then reduce the production cost of entire aphototropism mould 200.In addition, owing to only have a slice brightening piece 300 in the module 200 backlight, so the thinner thickness of module backlight 200.
It should be noted that the shown figure that goes out only is usefulness for example among Fig. 6, is not in order to limit the present invention.In fact, the relation at the light intensity of light 212 after brightening piece 300 outgoing of the present invention and visual angle can be along with different or other factors of the radius of curvature R of breadth extreme P, the thickness H of stripe prisms 320 and light incident curved surface 322 and some elementary errors is different.
Fig. 7 is the synoptic diagram of the brightening piece of another embodiment of the present invention.Please refer to Fig. 7, the brightening piece 300 that brightening piece 300a and Fig. 4 of present embodiment are illustrated is similar, and difference is in and disposes a plurality of sodium meter level microstructures 330 on the light-emitting face 310 of brightening piece 300a.These sodium meter level microstructures 330 for example are trickle structures such as little knuckling, ball, pyramid, and referring to Fig. 8, its microstructure size is about the category of hundreds of sodium rice.The structure of this sodium rice grade can produce polarization phenomena to incident light, causes light-emitting face 310 to have antireflection (Antireflection) function, referring to Fig. 9, can increase the penetrance of light at light-emitting face 310, and then improves whole brightening piece 330a light extraction efficiency.
Figure 10 is the synoptic diagram of the brightening piece of further embodiment of this invention.Please refer to Figure 10, the brightening piece 300b of present embodiment is similar to brightening piece 300 (as shown in Figure 4), below only is introduced at not existing together.Compared to brightening piece 300, the brightening piece 300b of present embodiment has more a plurality of lens pillars 340.These lens pillars 340 are disposed on the light-emitting face 310 in fact parallel to each other.Wherein, stripe prisms 320 for example is to be arranged in parallel along a first direction (Y-axis), and lens pillar 340 for example is to be arranged in parallel along a second direction (X-axis), and first direction is vertical with second direction.
Above-mentioned lens pillar 340 for example is the semi-cylindrical lens, and owing to these lens pillars 340 are to be parallel on the light-emitting face 310 along X-axis, therefore can further restrain the light on the X-Z in-plane, make light more concentrated, to promote the light enhancing effect of brightening piece 300b.
In sum, brightening piece of the present invention and module backlight have following advantage at least:
1. because the light incident curved surface of column prism can make the light of X-Z plane and Y-Z in-plane concentrate simultaneously, so brightening piece of the present invention has preferable light enhancing effect, to improve the center brightness value of the backlight that entire aphototropism mould was provided.
2. compared to known techniques, module backlight of the present invention only needs a slice brightening piece that the light of X-Z plane and Y-Z in-plane is concentrated, and therefore not only can reduce production costs, and also can reduce thickness.
3. in one embodiment, can on the light-emitting face of brightening piece, dispose sodium meter level microstructure, to promote the light extraction efficiency of brightening piece.
4. in one embodiment, can on the light-emitting face of brightening piece, dispose lens pillar, with the light enhancing effect of further lifting brightening piece.
Though the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention, and is any to a little change and retouching that the present invention did, must belong to protection scope of the present invention.
[main element symbol description]
100,200: backlight module
110,210: light source
112,112 ', 212: light
120,220: LGP
122,224,310: light-emitting face
130a, 130b, 230: diffusion sheet
140a, 140b, 300,300a, 300b: brightening piece
150: reflector plate
222: light entrance face
320: stripe prisms
322: light incident curved surface
324: the light reflecting slant
326: the plane
330: sodium meter level microstructure
340: lens pillar
H: thickness
P: breadth extreme
R: radius-of-curvature
θ: acute angle.
Claims (20)
1. brightening piece, it is characterized in that: a plurality of stripe prisms that it has a light-emitting face and is positioned at this light-emitting face opposite side, and these a plurality of stripe prisms are parallel to each other in fact, respectively this stripe prisms has a smooth incident curved surface and a smooth reflecting slant, wherein this light incident curved surface is relative with this light reflecting slant, and this light incident curved surface is outer convex surface, this light reflecting slant will be from the reflection of the light of this light incident curved surface incident, makes the direction of the directive property after this light reflection be parallel to the normal direction of this light-emitting face and penetrates from this light-emitting face.
2. brightening piece as claimed in claim 1 is characterized in that: respectively this stripe prisms has a plane, and respectively this light incident curved surface of this stripe prisms is to be connected between this light reflecting slant and this plane.
3. brightening piece as claimed in claim 1 is characterized in that: respectively folded acute angle is spent between 50 degree～67.5 between this light reflecting slant of this stripe prisms and this light-emitting face.
4. brightening piece as claimed in claim 1 is characterized in that: respectively the breadth extreme of this stripe prisms is P, and respectively the radius-of-curvature of this light incident curved surface is R, and 1.3≤P/R≤2.
5. brightening piece as claimed in claim 1 is characterized in that: respectively the thickness of this stripe prisms is H, and respectively the radius-of-curvature of this light incident curved surface is R, and 1.3≤H/R≤1.7.
6. brightening piece as claimed in claim 1 is characterized in that: have more a plurality of sodium meter level microstructures, be disposed on this light-emitting face.
7. brightening piece as claimed in claim 1 is characterized in that: have more a plurality of lens pillars, be disposed on this light-emitting face, and this each lens pillar is parallel to each other in fact.
8. brightening piece as claimed in claim 7 is characterized in that: this each stripe prisms is to be arranged in parallel along a first direction, and this each lens pillar is to be arranged in parallel along a second direction, and this first direction is vertical with this second direction.
9. brightening piece as claimed in claim 7 is characterized in that: this each lens pillar is the semi-cylindrical lens.
10. module backlight is characterized in that: comprising:
One light source provides a light;
One light guide plate is disposed at by this light source; And
One brightening piece, be disposed at a side of this light guide plate, and this light is this brightening piece of incident via this light guide plate, a plurality of stripe prisms that this brightening piece has a light-emitting face and is positioned at this light-emitting face opposite side, and this each stripe prisms is parallel to each other in fact, respectively this stripe prisms has a smooth incident curved surface and a smooth reflecting slant, wherein this light incident curved surface is relative with this light reflecting slant, and this light incident curved surface is outer convex surface, this light reflecting slant will make this light from this light-emitting face outgoing from the light reflection of this light incident curved surface incident.
11. module backlight as claimed in claim 10 is characterized in that: respectively this stripe prisms has more a plane, and respectively this light incident curved surface of this stripe prisms is to be connected between this light reflecting slant and this plane.
12. module backlight as claimed in claim 10 is characterized in that: respectively folded acute angle is spent between 50 degree～67.5 between this light reflecting slant of this stripe prisms and this light-emitting face.
13. module backlight as claimed in claim 10 is characterized in that: respectively the breadth extreme of this stripe prisms is P, and respectively the radius-of-curvature of this light incident curved surface is R, and 1.3≤P/R≤2.
14. module backlight as claimed in claim 10 is characterized in that: respectively the thickness of this stripe prisms is H, and respectively the radius-of-curvature of this light incident curved surface is R, and 1.3≤H/R≤1.7.
15. module backlight as claimed in claim 10 is characterized in that: this brightening piece has more a plurality of sodium meter level microstructures, is disposed on this light-emitting face.
16. module backlight as claimed in claim 10 is characterized in that: this brightening piece has more a plurality of lens pillars, be disposed on this light-emitting face, and this each lens pillar is parallel to each other in fact.
17. module backlight as claimed in claim 16 is characterized in that: this each stripe prisms is to be arranged in parallel along a first direction, and this each lens pillar is to be arranged in parallel along a second direction, and this first direction is vertical with this second direction.
18. module backlight as claimed in claim 16 is characterized in that: this each lens pillar is the semi-cylindrical lens.
19. module backlight as claimed in claim 10 is characterized in that: more wrap z and draw together diffusion sheet, be disposed at this brightening piece top.
20. module backlight as claimed in claim 10 is characterized in that: the normal direction that is parallel to this light-emitting face from the direction of the directive property of the light of this light reflecting slant reflection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610007002 CN101008683A (en) | 2006-01-25 | 2006-01-25 | Brightening piece and back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610007002 CN101008683A (en) | 2006-01-25 | 2006-01-25 | Brightening piece and back light module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101008683A true CN101008683A (en) | 2007-08-01 |
Family
ID=38697208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610007002 Pending CN101008683A (en) | 2006-01-25 | 2006-01-25 | Brightening piece and back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101008683A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916009A (en) * | 2010-08-02 | 2010-12-15 | 苏州汉朗光电有限公司 | Smectic-state liquid crystal display |
| CN103797406A (en) * | 2011-09-20 | 2014-05-14 | 3M创新有限公司 | Backlight device |
| CN103851537A (en) * | 2012-11-30 | 2014-06-11 | 海洋王（东莞）照明科技有限公司 | LED lamp and lens thereof |
| CN105044808A (en) * | 2015-08-05 | 2015-11-11 | 苏州华徕光电仪器有限公司 | Multi-reflection micro-structure surveying and mapping prism |
| CN107533188A (en) * | 2015-04-24 | 2018-01-02 | 3M创新有限公司 | Optical film |
-
2006
- 2006-01-25 CN CN 200610007002 patent/CN101008683A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916009A (en) * | 2010-08-02 | 2010-12-15 | 苏州汉朗光电有限公司 | Smectic-state liquid crystal display |
| CN103797406A (en) * | 2011-09-20 | 2014-05-14 | 3M创新有限公司 | Backlight device |
| CN103797406B (en) * | 2011-09-20 | 2016-08-17 | 3M创新有限公司 | Back lighting device |
| CN103851537A (en) * | 2012-11-30 | 2014-06-11 | 海洋王（东莞）照明科技有限公司 | LED lamp and lens thereof |
| CN107533188A (en) * | 2015-04-24 | 2018-01-02 | 3M创新有限公司 | Optical film |
| CN105044808A (en) * | 2015-08-05 | 2015-11-11 | 苏州华徕光电仪器有限公司 | Multi-reflection micro-structure surveying and mapping prism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9329328B2 (en) | Light guide plate and backlight module using the same | |
| CN101896765B (en) | Illuminating device and liquid crystal display device | |
| CN100370329C (en) | Light conducting plate and back light module | |
| CN101684927B (en) | High-collimation face type light source module and light output method thereof | |
| CN101675361A (en) | Optical prism sheet having a certain roughness thereon | |
| GB2432428A (en) | Brightness enhancement film with parallel prisms | |
| KR20100024752A (en) | Prism sheet and liquid crystal display having the same | |
| CN101680635B (en) | Light guide unit, illuminating device and liquid crystal display device | |
| US20090129078A1 (en) | Prism sheet and backlight module using the same | |
| US20090080218A1 (en) | Prism sheet and backlight module using the same | |
| CN102767768A (en) | Side-light type backlight module and LCD (liquid crystal display) | |
| CN101008683A (en) | Brightening piece and back light module | |
| CN101694285A (en) | Light guide plate and backlight module provided therewith | |
| CN101520522B (en) | Integrated brightening diffusion sheet | |
| CN101369031A (en) | Glass prism sheet and LCD device adopting the same | |
| CN103375732A (en) | Backlight module, light guide plate of backlight module, and display comprising the backlight module | |
| CN100386680C (en) | Back light module | |
| CN100454101C (en) | Light-guide plate | |
| CN102644889B (en) | Backlight module | |
| US20090142021A1 (en) | Composite light guiding film module | |
| CN201218442Y (en) | Backlight module and LCD device containing the same | |
| CN102053418A (en) | Brightness enhancement film (BEF) and backlight module | |
| KR20130126546A (en) | Optical films laminate and backlight unit having enhanced optical performance | |
| US9772439B2 (en) | Thin backlight with reduced bezel width | |
| EP2619612B1 (en) | Optical sheet, optical unit and lighting device using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |