CN101373235A - Backlight module and optical film thereof - Google Patents
Backlight module and optical film thereof Download PDFInfo
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- CN101373235A CN101373235A CNA2007101423910A CN200710142391A CN101373235A CN 101373235 A CN101373235 A CN 101373235A CN A2007101423910 A CNA2007101423910 A CN A2007101423910A CN 200710142391 A CN200710142391 A CN 200710142391A CN 101373235 A CN101373235 A CN 101373235A
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- blooming
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Abstract
An optical film comprises a substrate and at least a microstructure. The microstructure is arranged on one side of the substrate and provided with a base, a first closed surface and a second closed surface, wherein, the cross section of the microstructure is provided with at least a first edge and a second edge, and the first edge and the second edge encircle a closed curve respectively so as to form a first closed surface and a second closed surface.
Description
Technical field
The present invention is about a kind of backlight module and blooming thereof, especially in regard to a kind of backlight module and blooming thereof that strengthens biaxially oriented brightness that reach.
Background technology
Along with the arriving of digital Age, the technology of flat display apparatus is also grown up fast, has become one of indispensable electronic product, so popular also more and more higher for the technology and the functional requirement of flat display apparatus.
With regard to flat display apparatus, it mainly comprises a two-d display panel and a backlight module.Wherein this two-d display panel mainly has colored optical filtering substrates, thin film transistor base plate and is located in the liquid crystal layer between two substrates; And backlight module uses as backlight, and it can be evenly distributed in the light from a light source surface of liquid crystal panel.Traditionally, be the light source that is used as backlight module with cold-cathode fluorescence lamp (CCFL), and make backlight module be divided into straight-down negative and side light type back light module according to the set-up mode of light source.Recently in order to promote the brightness of flat display apparatus, and light is contracted in positive and negative 30 to 40 degree at the emission angle by brightness enhancement film, so, become one of indispensable technology of backlight module for the brightness enhancement film function of lifting backlight module.
Described according to United States Patent (USP) 6091547, please refer to shown in Figure 1ly, this backlight module 1A comprises a light source 11, at least one diffusion barrier 14 and a brightness enhancement film (brightness enhancement film) 12.If backlight module 1 is a side light type back light module, then diffusion barrier 14 and brightness enhancement film 12 are arranged on the light guide plate 13 in regular turn.Light source 11 is launched a light L1, and is arranged at a side of light guide plate 13.Light L1 via behind the diffusion barrier 14, enters brightness enhancement film 12, as shown in Figure 1 by light guide plate 13 guiding again.If backlight module 1B is a bottom-lighting type back light module, then diffusion barrier 14 and brightness enhancement film 12 are arranged on the light source 11 in regular turn.The light L1 of light source 11 directly enters diffusion barrier 14, enters brightness enhancement film 12 again, as shown in Figure 2.
With regard to brightness enhancement film 12, it can reflect into low-angle emergent light with the light L1 that injects, and the emission angle of most light L1 can be contracted in positive and negative 30 to 40 degree, so that the audience has stronger brightness vision effect at positive and negative 30 to 40 degree of optical axis with interior.Referring again to shown in Figure 1, it is the brightness enhancement film 12 with prismatic surface structure 121, and the prismatic surface structure 121 of this brightness enhancement film 12 is to be arranged in parallel with single direction V1.Yet, use aforesaid way only can provide the single shaft direction, for example the brightening effect of horizontal direction or vertical direction.If so desire to reach biaxially oriented, it is the brightening effect of horizontal direction and vertical direction, then need adopt two brightness enhancement film 12 to coincide mutually, and the prismatic surface structure 121 of two brightness enhancement film 12 is arranged in parallel with first direction V2 and second direction V3 respectively, and first direction V2 and second direction V3 are vertical mutually, as shown in Figure 2.
Yet, use two brightness enhancement film 12 not only can increase cost, more can reduce the penetrance of light L1.
Therefore, how to provide a kind of and can reach the brightening effect of biaxially oriented simultaneously, and reduce cost and promote the backlight module and the blooming thereof of light penetration rate, become one of important topic.
Summary of the invention
Because above-mentioned problem, purpose of the present invention can reach the brightening effect of biaxially oriented simultaneously for providing a kind of, and reduces cost and promote the backlight module and the blooming thereof of penetrance.
So for reaching above-mentioned purpose, a kind of blooming of the present invention comprises a substrate and at least one microstructure.This microstructure is arranged on the one side of substrate, and has one first sealing surface and one second sealing surface.Wherein the cross section of this microstructure has at least one first limit and at least one second limit, and first limit and second limit encompass closed curve respectively to form first sealing surface and second sealing surface.
For reaching above-mentioned purpose, a kind of backlight module of the present invention comprises a light source and a blooming.Light emitted one light, blooming receives the light of incident, and has a substrate and at least one microstructure, and this microstructure is arranged on the one side of substrate, and has one first sealing surface and one second sealing surface.Wherein the cross section of this microstructure has at least one first limit and at least one second limit, and first limit and second limit respectively around one one-tenth closed curve to form first sealing surface and second sealing surface.
From the above, backlight module of the present invention and blooming thereof are that blooming is arranged on the light path of the light that light source launches, and be arranged on the substrate by each microstructure of blooming, and first limit in microstructure cross section and second limit encompass occluding surface respectively to form first sealing surface and second sealing surface.Compare with conventional art, the present invention only uses the monolithic optical film with microstructure, it not only can reduce cost, and more can just can make light the time by first sealing surface of microstructure and first limit and second limit in second sealing surface and microstructure cross section by microstructure, reach biaxially oriented brightness and strengthen effect, and then avoid the reduction of light transmittance.
Description of drawings
Fig. 1 is a kind of synoptic diagram of traditional backlight module;
Fig. 2 is the synoptic diagram of another traditional backlight module;
Fig. 3 is the synoptic diagram according to a kind of backlight module of first embodiment of the invention;
Fig. 4 is the three-dimensional diagrammatic cross-section of the blooming of Fig. 3;
Fig. 5 is the schematic top plan view according to the blooming of first embodiment of the invention;
Fig. 6 is the diagrammatic cross-section of the blooming of Fig. 5 along the AA line;
Fig. 7 A to Fig. 7 C shows the schematic cross-section according to the various different aspects of microstructure of the present invention;
Fig. 8 A to Fig. 8 D shows the synoptic diagram of blooming of the present invention;
Fig. 9 shows the synoptic diagram of the different shape microstructure of blooming of the present invention;
Figure 10 A and Figure 10 B show the synoptic diagram according to the blooming of the present invention second and the 3rd embodiment respectively;
Figure 11 shows the optical axis angle of blooming of first embodiment of the invention and the graph of a relation of brightness; And
Figure 12 is for showing the synoptic diagram according to a kind of backlight module of second embodiment of the invention.
The component symbol explanation:
1,2,7: backlight module 11,3,71: light source
12: brightness enhancement film 121: the prismatic surface structure
13,6: light guide plate 14: diffusion barrier
41: substrate
4,4A, 4B, 4C, 4D, 72: blooming
42: microstructure 421: pedestal
423: the second sealing surfaces of 422: the first sealing surfaces
424: bottom 425: top
427: the second limits, 426: the first limits
42A, 42B, 42C, 42D, 42E: end
43: optical diffusion 5,73: the first diffusion sheets
74: the second diffusion sheet X, Y, Z: axle
C1, C2, C3, C4, C5: closed curve
L1, L2, L3: light
S1, S2, S3, S4, S5: cross section
Embodiment
Hereinafter with reference to relevant drawings, a kind of backlight module and blooming thereof according to the preferred embodiment of the present invention are described.
Please refer to shown in Figure 3ly, the backlight module 2 of first embodiment of the invention comprises a light source 3, a blooming 4, one first diffusion sheet 5 and a light guide plate 6.This backlight module 2 can be a bottom-lighting type back light module or a side light type back light module, is to be that a side light type back light module is an example with backlight module 2 at this.
This first diffusion sheet 5 is arranged on a side of blooming 4, and light guide plate 6 is arranged on the opposite side of blooming 4.Light source 3 is adjacent to light guide plate 6, and light source 3 emissions one light L2 directive light guide plate 6, and light L2 sees through light guide plate 6 directive bloomings 4.
Please more simultaneously with reference to Fig. 3 and shown in Figure 4, blooming 4 receives the light L2 of incident, and has a substrate 41 and at least one microstructure 42.This microstructure 42 is arranged on the one side of substrate 41, and have one first sealing surface 422 and one second sealing surface 423, and first sealing surface 422 and second sealing surface 423 interconnect, and first sealing surface 422 and second sealing surface 423 reflect the light L2 of incident blooming 4 on the implementation respectively.The material of this blooming 4 is a light-transmitting materials, for example a polyethylene terephthalate (polyethylene terephthalate, PET), a polycarbonate (polycarbonate, PC) or a polymethylmethacrylate (PMMA).
Please extremely shown in Figure 6 with reference to Fig. 4 simultaneously again, this microstructure 42 is to be arranged with or to be convexly set on the substrate 41.As shown in Figure 4, and when the microstructure 42 of blooming 4 was convexly set in substrate, then first sealing surface 422 was to be convexly set in substrate, and second sealing surface 423 is to be arranged with in first sealing surface 422, and microstructure 42 also has a bottom 424, and it is connected with second sealing surface 423.In addition, the shape of bottom 424 is also unrestricted, can be a circle, an ellipse, a class triangle, a class rhombus or a class rectangle, more can be a polygon, and is that the circle that is shaped as with bottom 424 is an example at this.As Fig. 5 and shown in Figure 6, when the microstructure 42 of blooming 4A was arranged with in substrate 41, then first sealing surface 422 was to be arranged with in substrate 41, and second sealing surface 423 is to be convexly equipped with in first sealing surface 422.This microstructure 42 also has a top 425, be connected with second sealing surface 423, and the shape at top 425 can be a circle, an ellipse, a class triangle, a class rhombus or a class rectangle, even be a polygon, be that the circle that is shaped as with top 425 is example (as Fig. 4 and shown in Figure 5) at this.
Please more simultaneously with reference to shown in Fig. 4, Fig. 6 and Fig. 7 A to Fig. 7 E, end 42A, the 42B of this microstructure 42,42C, 42D, 42E can be pointed shape (shown in Fig. 7 C) of a pointed shape (shown in Fig. 4 and Fig. 7 A), a planar-shaped (as shown in Figure 6), a circular arc (shown in Fig. 7 B) or one.In addition, first limit 426 and second limit 427 can be straight line (shown in Fig. 4, Fig. 6 and Fig. 7 A to Fig. 7 B) on the implementation, or limit is a camber line and another side is straight line (shown in Fig. 7 C).The shape of former section S 1 by first limit 426, second limit 427 and end 42A, 42B, 42C, 42D, the formed microstructure 42 of 42E, S2, S3, S4, S5 can be a triangle (as shown in Figure 4), one trapezoidal (as shown in Figure 6), half arc (shown in Fig. 7 A), a class triangle (shown in Fig. 7 B) or a chevron (shown in Fig. 7 C).
Please refer to shown in Fig. 8 A to Fig. 8 D, the closed curve C1 of present embodiment, C2, C3, C4, the shape of C5, be a circle (as shown in Figure 4) on the implementation, one ellipse (shown in Fig. 8 A), one class triangle (shown in Fig. 8 B), an one class rhombus (shown in Fig. 8 C) or a class rectangle (shown in Fig. 8 D), certainly more can be a polygon (not shown), thus by first limit 426 and second limit 427 around the closed curve C1 of above-mentioned different shape, C2, C3, C4, C5 can respectively be a circle (as shown in Figure 4) on blooming 4B also with microstructure 42 shapes that form, one ellipse, one class triangle, an one class rhombus or a class rectangle (as shown in Figure 9).
This substrate 41 and this microstructure 42 can be formed in one or be adhesion-molded.At this is to be formed in one with substrate 41 and each microstructure 42 to be example, and the production method of microstructure 42 is also unrestricted, can use the modes such as class gold-tinted, electroforming, model processing procedure or precise and tiny processing procedure in soft pressure, hot pressing, hot roll extrusion, ultraviolet light polymerization, the micro-electromechanical technology to be formed on the substrate 41.
In addition; please refer to shown in Figure 10 A and Figure 10 B; blooming 4C, 4D also have an optical diffusion 43; be arranged on the another side of substrate 41 with respect to microstructure 42; and the material of optical diffusion 43 comprises a light-transmissive resin and particle mixture (shown in Figure 10 A), certainly more can have the light-transmitting materials (shown in Figure 10 B) of surface micro-structure for one.
These microstructure 42 set those faces at substrate 41 are exiting surface, and the other one side of substrate 41 those faces then is an incidence surface relatively.
Please refer to shown in Figure 11, when light beam incident optical film 4 and microstructure 42 thereof, light refraction becomes low-angle and penetrates, via learning from the visual angle of A direction and B direction and the relation of luminance gain after the simulation softward calculating, its as a result display view angle in positive and negative 30～40 the degree in, the yield value of its briliancy is greater than 1, so can greatly promote the brightness of light.
The backlight module 2 of present embodiment does not only need by monolithic optical film 4, first sealing surface 422 and second sealing surface 423 of its microstructure 42 match, the brightness that just can make light L2 reach biaxially oriented (vertical direction and horizontal direction) by microstructure 42 time strengthens effect, more can reduce cost and avoid the reduction of light transmittance.
Please refer to shown in Figure 12ly, the backlight module 7 of second embodiment of the invention comprises a light source 71, a blooming 72 and one first diffusion sheet 73.Light source 3, blooming 4 and first diffusion sheet 5 in the backlight module 2 of this light source 71, blooming 72 and first diffusion sheet 33 and above-mentioned first embodiment (as shown in Figure 3) have identical formation and effect, so do not repeat them here.And backlight module 2 (as shown in Figure 3) difference of the backlight module 7 of present embodiment and first embodiment is that the former also comprises one second diffusion sheet 74.This first diffusion sheet 73 is arranged on a side of blooming 72, second diffusion sheet, 74 relative first diffusion sheets 73 are arranged at the opposite side of blooming 72, and light source 71 emissions one light L3, and relatively blooming is arranged at a side of second diffusion sheet 74, so the backlight module 7 of present embodiment is a bottom-lighting type back light module.
In sum, backlight module of the present invention and blooming thereof are that blooming is arranged on the light path of the light that light source launches, and be arranged on the substrate by each microstructure of blooming, and interconnective at least the first limit in the cross section of microstructure and at least the second side ring around occluding surface to form first sealing surface and second sealing surface respectively.Compare with conventional art, the present invention only uses monolithic optical film and its to have microstructure.This kind mode not only can reduce cost, and more can be by first sealing surface and second sealing surface of microstructure, and first limit in microstructure cross section and second limit, just can make light by microstructure the time, reach biaxially oriented brightness and strengthen effect, and then avoid the reduction of light transmittance.
The above only is an illustrative, but not is restricted.Anyly do not break away from spirit of the present invention and category, and, all should comprise in the present invention its equivalent modifications of carrying out or change.
Claims (22)
1. blooming comprises:
One substrate; And
At least one microstructure, be arranged on the one side of this substrate, and have one first sealing surface and one second sealing surface, wherein the cross section of this microstructure has at least one first limit and at least one second limit, this first limit and this second limit respectively around a closed curve to form this first sealing surface and this second sealing surface.
2. blooming according to claim 1, wherein this first sealing surface and this second sealing surface reflect a light that is incident in this blooming respectively.
3. blooming according to claim 1, wherein this closed curve is shaped as polygon, circle, ellipse, class triangle, class rhombus or class rectangle.
4. blooming according to claim 1, wherein this first limit or this second limit are a hypotenuse or arc limit, perhaps this first limit and this second limit are straight line, or one for camber line another is a straight line.
5. blooming according to claim 1, wherein the cross section of this microstructure also has an end, is provided with and is connected between this first limit and this second limit.
6. blooming according to claim 5, wherein this end is pointed shape, falls pointed shape, circular arc or planar-shaped.
7. blooming according to claim 1, wherein the cross sectional shape of this microstructure is triangle, trapezoidal, circular arc, class triangle or chevron.
8. blooming according to claim 1, wherein this microstructure is to be arranged with or to be convexly set in this substrate.
9. blooming according to claim 8, wherein this first sealing surface is to be convexly set in this substrate, and this second sealing surface is to be arranged with in this first sealing surface, and wherein this microstructure also has a bottom, is connected with this second sealing surface.
10. blooming according to claim 8, wherein this first sealing surface is to be arranged with in this substrate, and this second sealing surface is to be convexly set in this first sealing surface, and wherein this microstructure also has a top, is connected with this second sealing surface.
11. according to claim 9 or 10 described bloomings, wherein this bottom or this top is shaped as polygon, circle, ellipse, class triangle, class rhombus or class rectangle.
12. blooming according to claim 1, wherein these microstructures are to arrange arbitrarily with the structure of different size or shape to form.
13. blooming according to claim 1, wherein this substrate and this microstructure are formed in one or are adhesion-molded.
14. blooming according to claim 1, wherein the material of this blooming is a polyethylene terephthalate, a polycarbonate, a polymethylmethacrylate or its composition, and perhaps the material of this blooming is a light-transmitting materials.
15. blooming according to claim 1, wherein this microstructure is with soft pressure, hot pressing, hot roll extrusion, ultraviolet light polymerization, class gold-tinted, electroforming, model or the moulding of precise and tiny processing procedure mode.
16. blooming according to claim 1, it also comprises an optical diffusion, is arranged on the another side of this substrate, and this another side of this substrate is an incidence surface.
17. blooming according to claim 16, wherein the material of this optical diffusion comprises that the material of a light-transmissive resin and particle mixture or this optical diffusion is a light-transmitting materials.
18. blooming according to claim 16, wherein this optical diffusion has a surface micro-structure.
19. a backlight module comprises:
One light source is launched a light; And
One blooming, receive the light of this incident, and have a substrate and an at least one microstructure, this microstructure is arranged on the one side of this substrate, and have one first sealing surface and one second sealing surface, wherein the cross section of this microstructure has at least one first limit and at least one second limit, and this first limit and this second limit encompass a closed curve respectively to form this first sealing surface and this second sealing surface.
20. backlight module according to claim 19, it also comprises one first diffusion sheet, is arranged on a side of this blooming.
21. backlight module according to claim 20, it also comprises a light guide plate, and this first diffusion sheet is arranged at the opposite side of this blooming relatively, and is arranged at a side of this light source, and this light sees through this light guide plate and penetrates this blooming to wear.
22. backlight module according to claim 20, it also comprises one second diffusion sheet, and this first diffusion sheet is arranged at the opposite side of this blooming relatively, and relative this blooming of this light source is arranged at a side of this second diffusion sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101423910A CN101373235A (en) | 2007-08-22 | 2007-08-22 | Backlight module and optical film thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101423910A CN101373235A (en) | 2007-08-22 | 2007-08-22 | Backlight module and optical film thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101373235A true CN101373235A (en) | 2009-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101423910A Pending CN101373235A (en) | 2007-08-22 | 2007-08-22 | Backlight module and optical film thereof |
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| CN (1) | CN101373235A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107563A (en) * | 2009-12-25 | 2011-06-29 | 鸿富锦精密工业（深圳）有限公司 | Imprinting component, manufacturing method thereof and method for forming brightness enhancement film |
| CN102654260A (en) * | 2011-09-29 | 2012-09-05 | 北京京东方光电科技有限公司 | Backlight source and liquid crystal display (LCD) |
| CN108008576A (en) * | 2018-01-02 | 2018-05-08 | 京东方科技集团股份有限公司 | A kind of diffusion sheet and preparation method thereof, backlight module and display device |
| CN108761628A (en) * | 2015-05-28 | 2018-11-06 | 江苏双星彩塑新材料股份有限公司 | A kind of optical diaphragm for light guide plate |
| CN109358447A (en) * | 2018-01-08 | 2019-02-19 | 友达光电股份有限公司 | Optical film and display device with optical film |
| CN112951078A (en) * | 2021-01-28 | 2021-06-11 | 业成科技（成都）有限公司 | Cover plate for display device and manufacturing method thereof |
-
2007
- 2007-08-22 CN CNA2007101423910A patent/CN101373235A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107563A (en) * | 2009-12-25 | 2011-06-29 | 鸿富锦精密工业（深圳）有限公司 | Imprinting component, manufacturing method thereof and method for forming brightness enhancement film |
| CN102654260A (en) * | 2011-09-29 | 2012-09-05 | 北京京东方光电科技有限公司 | Backlight source and liquid crystal display (LCD) |
| US9121984B2 (en) | 2011-09-29 | 2015-09-01 | Beijing Boe Optoelectronics Technology Co., Ltd. | Backlight unit and liquid crystal display using the same |
| CN108761628A (en) * | 2015-05-28 | 2018-11-06 | 江苏双星彩塑新材料股份有限公司 | A kind of optical diaphragm for light guide plate |
| CN108008576A (en) * | 2018-01-02 | 2018-05-08 | 京东方科技集团股份有限公司 | A kind of diffusion sheet and preparation method thereof, backlight module and display device |
| CN109358447A (en) * | 2018-01-08 | 2019-02-19 | 友达光电股份有限公司 | Optical film and display device with optical film |
| CN109358447B (en) * | 2018-01-08 | 2021-08-20 | 友达光电股份有限公司 | Optical film and display device having the same |
| CN112951078A (en) * | 2021-01-28 | 2021-06-11 | 业成科技（成都）有限公司 | Cover plate for display device and manufacturing method thereof |
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Open date: 20090225 |