CN102364359A - Brightening film - Google Patents
Brightening film Download PDFInfo
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- CN102364359A CN102364359A CN2011103466404A CN201110346640A CN102364359A CN 102364359 A CN102364359 A CN 102364359A CN 2011103466404 A CN2011103466404 A CN 2011103466404A CN 201110346640 A CN201110346640 A CN 201110346640A CN 102364359 A CN102364359 A CN 102364359A
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Abstract
The invention relates to a brightening film, which comprises a substrate and a microstructural layer, wherein the substrate is provided with a first optical surface and a second optical surface; the second optical surface is positioned on the back surface of the first optical surface; the microstructural layer is arranged on the first optical surface and comprises a master microstructure and a slave microstructure; the master microstructure comprises a plurality of master microstructural units; the slave microstructure comprises a plurality of slave microstructural units; and the master microstructural units and the slave microstructural units extend along a first direction and are arranged alternately along a second direction. The brightening film is easy to prepare, and can enhance the luminance of light sources and adjust the convergent angle of light beams.
Description
Technical field
The present invention relates to a kind of brightness enhancement film, be specifically related to a kind of brightness enhancement film that strengthens light-source brightness and adjustment light beam convergence angle.
Background technology
At present, brightness enhancement film is widely used in illuminating module to be used for converging the light that light source is sent.Especially in display devices such as monitor, use brightness enhancement film always, to increase display brightness and the energy of practicing thrift the display battery apparatus.The principle of brightness enhancement film is through reflection the light outside the directive observer visual angle to be adjusted within the observer visual angle, has so just improved the utilization factor of luminous energy that light source sends.
Common brightness enhancement film (BEF) is to constitute in order to the prism that converges light by many, and these prisms are arranged according to a direction, form a prism array.Because prism array is only arranged according to single direction, light only converges in a direction after passing this brightness enhancement film; Usually need use two common brightness enhancement film quadratures to place in order to make light obtain convergence effect simultaneously, increase production cost in level and vertical direction.
U.S. Pat 20100265588A1 discloses that a kind of this brightness enhancement film comprises a substrate in order to converge the brightness enhancement film with compound texture structure that emits beam from light source, at least a first lines pattern and at least a second lines pattern.Substrate has one first optical surface and one and is positioned at aspectant second optical surface of first optics.The first lines pattern is arranged on first optical surface, and on first optical surface, forms the first lines unit by the first order direction.The second lines pattern is close to the first lines pattern, and is arranged on first optical surface.The second lines pattern forms the second lines unit by the second order direction.The first lines unit that the first lines pattern is constituted is connected with the second lines unit that the second lines pattern is constituted mutually.Can adjust the light convergence angle of illuminating module and the luminosity that increases specific direction through this structure.But; The large tracts of land brightness enhancement film is all used with the complementary structure wheel of this brightness enhancement film microstructure and is produced through press mold transfer printing mode at present; The structure wheel then forms through the rolling cut; And the complementary structure of the said structure of this United States Patent (USP) wheel is because of having the microstructure of both direction at least, so plant comparatively difficulty of the corresponding structure wheel processing of structure brightness enhancement film.For this reason, the present invention aims to provide a kind of be easy to produce and brightness enhancement film of can be simultaneously level and vertical direction convergence angle being adjusted.
Summary of the invention
In order to overcome above-mentioned defective, the purpose of this invention is to provide a kind of be easy to produce, can strengthen light-source brightness and the adjustment send the level of light beam and the brightness enhancement film of vertical direction convergence angle from light source.
Brightness enhancement film according to the invention comprises: substrate and microstructured layers, said substrate have first optical surface and second optical surface, and second optical surface is positioned at the back side of first optical surface; Said microstructured layers is arranged on first optical surface;
Wherein, said microstructured layers comprises: main microstructure and less important microstructure;
Said main microstructure comprises a plurality of main microstructure units;
Said less important microstructure comprises a plurality of less important microstructure units;
Said main microstructure unit and less important microstructure unit stretch, alternately arrange in second direction along first direction.
In addition, said first direction is vertical with second direction.
In addition, said main microstructure unit is a prism structure, and said prism structure is that triangle, trapezoidal or drift angle are rounded triangle by the section that cuts perpendicular to the plane of first direction.
In addition, said less important microstructure unit has the wavy curved surface that rises and falls along direction of extension, and curved surface crest line direction is a second direction.
In addition, the side of said less important microstructure unit closely is connected with adjacent main microstructure unit.
In addition, the wavy curved surface of said less important microstructure unit is sine or cosine curve by the outline line that cuts perpendicular to the plane of second direction.
In addition, the amplitude of the sine of said a plurality of microstructure units or cosine curve, frequency are identical or different.
In addition; The said triangle of said main microstructure unit, trapezoidal or drift angle are that the summit of rounded triangle is H1 to the distance on base; The crest of the wavy curved surface of said less important microstructure unit and the distance of trough are H2; And trough overlaps H1 with first optical surface: H2 is 1: 0.1～0.5.
In addition, said substrate is selected from one or more in polyethylene terephthalate, polycarbonate, polymethylmethacrylate, tygon, PVC, the polypropylene.
In addition, said microstructured layers is a UV-cured resin; Said UV-cured resin is epoxy resin, carbamates, polyethylene kind or polyesters UV-cured resin.
After light gets into brightness enhancement film; In main microstructure; Part light reflects at the prismatic side surface of main microstructure unit, and total reflection can take place a part of light, and then light is recycled through reflection effect again in illuminating module; And this part light is reflected at the prismatic side surface of main microstructure unit; The angle of adjustment side surface and the substrate first optical surface angle can be adjusted the rising angle of light after refraction, and light is assembled towards user's direction, can adjust the convergence angle of emergent ray like this; In less important microstructure unit; Part light reflects in less important microstructure unit contoured surface, and total reflection can take place a part of light, and then light is recycled through reflection effect again in illuminating module; And this part light is reflected in less important microstructure unit contoured surface; The frequency and the amplitude of adjustment contoured surface outline line can be adjusted the rising angle of light after refraction, and light is assembled towards user's direction, can adjust the convergence angle of emergent ray like this.Thereby this brightness enhancement film can be adjusted the light of both direction simultaneously; Thereby the lighting angle of regulating display device distributes; Use two common brightness enhancement film quadratures to place with tradition; To realize that this invention can reduce the use of a slice brightness enhancement film, has practiced thrift production cost to the compared with techniques of both direction light adjustment.
Description of drawings
Fig. 1 is the first embodiment brightness enhancement film synoptic diagram.
Fig. 2 is main microstructure synoptic diagram.
Fig. 3 is the side schematic view of the less important microstructure unit of less important microstructure.
Fig. 4 is the synoptic diagram of the less important microstructure unit of less important microstructure.
Fig. 5 is that main microstructure unit is along the second direction diagrammatic cross-section.
Fig. 6 A moves towards synoptic diagram for expression light in main microstructure unit.
Fig. 6 B moves towards synoptic diagram for expression light in less important microstructure unit.
Fig. 7 A is the second embodiment brightness enhancement film synoptic diagram.
Fig. 7 B is that the second embodiment brightness enhancement film is along the second direction diagrammatic cross-section.
Among the figure: 10: brightness enhancement film; 100: substrate; 101: the first optical surfaces; 102: the second optical surfaces; 200: microstructured layers; 202: main microstructure; 204: less important microstructure; 206: main microstructure unit; 208 less important microstructure units; 302: first direction; 304: second direction; 212: the side of less important microstructure unit; 214: wavy curved surface; 210: main microstructure unit side; 218: the trough of wavy curved surface; 220: the crest of wavy curved surface; 20: brightness enhancement film.
Embodiment
Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
Embodiment 1
Fig. 1 is a first embodiment of the invention.As shown in Figure 1, at first choose polyethylene terephthalate as substrate 100.A face with substrate is first optical surface 101, and its opposite is second optical surface 102.Coating polyethylene UV-cured resin layer on first optical surface 101 of substrate carries out press mold with mold wheel to UV-cured resin, and with UV-irradiation, and it is solidified, and obtains being arranged at the microstructured layers 200 on first optical surface 101 of substrate 100.
The microstructured layers 200 that makes through above-mentioned press mold comprises main microstructure 202 and less important microstructure 204.
Shown in the main microstructure synoptic diagram of Fig. 2, main microstructure 202 is made up of along second direction 304 arranged a plurality of main microstructure unit 206 that stretches along first direction 302, and first direction 302 is perpendicular to second direction 304; Main microstructure unit 206 is the rectangular prism structure in the present embodiment, and this prism structure is an isosceles right triangle by the section that is cut perpendicular to the first direction plane.Like Fig. 3 and shown in Figure 4, less important microstructure 204 has a plurality of less important microstructure units 208, and less important microstructure unit 208 stretches along first direction 302, alternately arranges at second direction 304 and main microstructure unit 206.Fig. 4 representes that a less important microstructure unit 208 is embedded between two main microstructure units 206; Less important microstructure unit 208 sides 212 closely are connected with adjacent main microstructure unit side 210; Another face is the wavy curved surface 214 that only rises and falls in this less important microstructure unit direction of extension, and less important microstructure unit 208 stretches along first direction 302; The wavy curved surface of less important microstructure unit 208 is by the definite sinusoidal curve of trigonometric equation y=sin (2x) by the outline line that cuts perpendicular to the second direction plane.
Fig. 5 is that main microstructure unit is along the first direction diagrammatic cross-section.Main microstructure unit 206 prism structure summits and its bottom surface distance H 1, H1 is 25um; The trough 218 of the wavy curved surface of less important microstructure unit 208 overlaps with first optical surface 101, and the crest 220 of the wavy curved surface of less important microstructure unit 208 is H2 with the distance of trough 218, and H2 is 5um.
Fig. 6 A is a light in main microstructure unit moves towards synoptic diagram.Light main microstructure unit 206 by the trend in the section that is cut perpendicular to the first direction plane shown in Fig. 6 A; It shows that incident ray is when the side of the main microstructure unit 206 of process; An incident light splitter is because of the refraction effect outgoing, and emergent ray converges with respect to incident ray; Another part light is reflected because of total reflection effect, and then those reflection rays are recycled through reflection effect again in illuminating module, and this part light is reflected at main microstructure unit side surface.In addition; When press mold makes microstructured layers 200; The angle that can adjust side surface and the substrate first optical surface angle makes light assemble towards user's direction with the rising angle of adjustment light after refraction, can be adjusted at the convergence angle of emergent ray in the said section like this.
Light less important microstructure prism elements by the trend in the section that is cut perpendicular to the second direction plane shown in Fig. 6 B; It shows that incident ray is through less important microstructure unit relief the time; Part incident ray is because of the refraction effect outgoing, and emergent ray converges with respect to incident ray; Another part light is reflected because of total reflection effect; Then these reflection rays are recycled through reflection effect again in illuminating module; And this part light is reflected at less important microstructure relief; Frequency, the amplitude of adjustment relief outline line can be adjusted the rising angle of light after refraction, and light is assembled towards user's direction, can be adjusted at the convergence angle of emergent ray in the said section like this.
Embodiment 2
Fig. 7 A and Fig. 7 B are the synoptic diagram of second embodiment of the invention.Brightness enhancement film 20 is similar with brightness enhancement film 10 shown in Figure 1 shown in Fig. 7 A; In addition like Fig. 7 B second embodiment brightness enhancement film along shown in the second direction diagrammatic cross-section; Their difference is that main microstructure is that drift angle has the isosceles triangle that radius is the 2um fillet at the section perpendicular to first direction; The main microstructure of this kind is prismatic can to play anti-scraping effect owing to have the circular arc faceted pebble when brightness enhancement film is assembled, to improve product assembling yield.
Though the present invention sets forth as above with preferred embodiment; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under the present invention; In spirit that does not break away from the present invention and scope, can do various changes and modification, so the claim scope person of defining that protection scope of the present invention is attached is as the criterion after looking.
Claims (10)
1. a brightness enhancement film is characterized in that, comprising: substrate and microstructured layers, said substrate have first optical surface and second optical surface, and second optical surface is positioned at the back side of first optical surface; Said microstructured layers is arranged on first optical surface;
Wherein, said microstructured layers comprises: main microstructure and less important microstructure;
Said main microstructure comprises a plurality of main microstructure units;
Said less important microstructure comprises a plurality of less important microstructure units;
Said main microstructure unit and less important microstructure unit stretch, alternately arrange in second direction along first direction.
2. brightness enhancement film according to claim 1 is characterized in that said first direction is vertical with second direction.
3. brightness enhancement film according to claim 1 and 2 is characterized in that, said main microstructure unit is a prism structure, and said prism structure is that triangle, trapezoidal or drift angle are rounded triangle by the section that cuts perpendicular to the plane of first direction.
4. according to the arbitrary described brightness enhancement film of claim 1～3, it is characterized in that said less important microstructure unit has the wavy curved surface that rises and falls along direction of extension, and curved surface crest line direction is a second direction.
5. according to the arbitrary described brightness enhancement film of claim 1～4, it is characterized in that the side of said less important microstructure unit closely is connected with adjacent main microstructure unit.
6. according to the arbitrary described brightness enhancement film of claim 1～5, it is characterized in that the wavy curved surface of said less important microstructure unit is sine or cosine curve by the outline line that cuts perpendicular to the plane of second direction.
7. according to the arbitrary described brightness enhancement film of claim 1～6, it is characterized in that the sine of said a plurality of microstructure units or the amplitude of cosine curve, frequency are identical or different.
8. according to the arbitrary described brightness enhancement film of claim 1～7; It is characterized in that; The said triangle of said main microstructure unit, trapezoidal or drift angle are that the summit of rounded triangle is H1 to the distance on base; The crest of the wavy curved surface of said less important microstructure unit and the distance of trough are H2, and trough overlaps H1 with first optical surface: H2 is 1: 0.1～0.5.
9. according to the arbitrary described brightness enhancement film of claim 1～8, it is characterized in that said substrate is selected from one or more in polyethylene terephthalate, polycarbonate, polymethylmethacrylate, tygon, PVC, the polypropylene.
10. according to the arbitrary described brightness enhancement film of claim 1～9, it is characterized in that said microstructured layers is a UV-cured resin; Said UV-cured resin is epoxy resin, carbamates, polyethylene kind or polyesters UV-cured resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103466404A CN102364359A (en) | 2011-11-04 | 2011-11-04 | Brightening film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103466404A CN102364359A (en) | 2011-11-04 | 2011-11-04 | Brightening film |
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| Publication Number | Publication Date |
|---|---|
| CN102364359A true CN102364359A (en) | 2012-02-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103466404A Pending CN102364359A (en) | 2011-11-04 | 2011-11-04 | Brightening film |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100046200A1 (en) * | 2008-08-22 | 2010-02-25 | Nano Precision Corporation | Prism sheet and backlight module |
| CN101852876A (en) * | 2009-04-02 | 2010-10-06 | 财团法人工业技术研究院 | Composite optical diaphragm and surface light source module |
| CN202256735U (en) * | 2011-09-20 | 2012-05-30 | 北京康得新复合材料股份有限公司 | Composite structure brightness enhancing film |
| CN202256749U (en) * | 2011-09-26 | 2012-05-30 | 北京康得新复合材料股份有限公司 | Brightening film with composite structure |
-
2011
- 2011-11-04 CN CN2011103466404A patent/CN102364359A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100046200A1 (en) * | 2008-08-22 | 2010-02-25 | Nano Precision Corporation | Prism sheet and backlight module |
| CN101852876A (en) * | 2009-04-02 | 2010-10-06 | 财团法人工业技术研究院 | Composite optical diaphragm and surface light source module |
| CN202256735U (en) * | 2011-09-20 | 2012-05-30 | 北京康得新复合材料股份有限公司 | Composite structure brightness enhancing film |
| CN202256749U (en) * | 2011-09-26 | 2012-05-30 | 北京康得新复合材料股份有限公司 | Brightening film with composite structure |
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Application publication date: 20120229 |