CN100480813C - Planar light source module - Google Patents
Planar light source module Download PDFInfo
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- CN100480813C CN100480813C CNB2005101048668A CN200510104866A CN100480813C CN 100480813 C CN100480813 C CN 100480813C CN B2005101048668 A CNB2005101048668 A CN B2005101048668A CN 200510104866 A CN200510104866 A CN 200510104866A CN 100480813 C CN100480813 C CN 100480813C
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- light source
- source module
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- composite optical
- plane light
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Abstract
The invention relates to a plane light source module, which comprises a composite optical film and a light source, wherein the composite optical film is provided with a first optical surface and a second optical surface capable of receiving incident light, the light source is of a surface light-emitting type and faces the second optical surface, the composite optical film also comprises at least one microstructure unit, the microstructure unit is positioned on the first optical surface and is made of light-permeable materials, and the microstructure unit is provided with a first side surface capable of diffusing the incident light and a second side surface capable of concentrating the incident light.
Description
Technical field
The present invention relates to a kind of plane light source module, relate in particular to a kind of plane light source module of the composite optical diaphragm of arranging in pairs or groups, wherein this composite optical diaphragm is that diffusion component and light-collecting component are arranged at same rete.
Background technology
In society now, LCD applies to personal computer widely and all kinds of image shows in the product, because this class display is the passive type video display, so must add that a planar light source can make the image on the liquid crystal surfactant clearly be seen at its rear, in order to reach this purpose, this planar light source must be able to make light have certain degree of divergence and brightness even.
As from the foregoing, in backlight module, most important two parts are light source and are placed on optical diaphragm group on the light source.Present planar light source is in respect of micromolecule Organic Light Emitting Diode (SMOLED), macromolecule Organic Light Emitting Diode (PLED), electroluminescence (EL) and plane fluorescent tube (FEL) etc.; And be to obtain good light to distribute (effectively visual angle and homogeneity etc.), the optical diaphragm group that need place on planar light source comprises down diffusion sheet, light-collecting piece, goes up diffusion sheet and polar biased reflector plate or the like.
See also Figure 1A, United States Patent (USP) US6,091, No. 547 briliancy control film (LuminanceControl Film) utilize two diamond structures 10 and 12 of fitting to reach the effect of control light, guide lights, make light concentrate, increase the briliancy of forward light; Though this structure can be concentrated light effectively, yet can't reach the purpose of diffusion.
Please refer to Figure 1B again, the scattering sheet that Jap.P. is JP2001324608 number (Light-DiffusingSheet) discloses the resin particle 16 of distribution different-grain diameter size on a transparency carrier 14 and has fixed it to stick together resin 18, can produce the purpose that mixed and disorderly scattering reach the light diffusion after making light by this transparency carrier 14; But can make the light service efficiency of diffusion sheet reduce owing to add these molecules, and this technology is only simple used for diffusion, can't reach concentrated purpose.
Fig. 2 is United States Patent (USP) US6,052, No. 164 electroluminescent display (Electroluminescent display with brightness enhancement) with reinforcement brightness, in this structure, comprise electroluminescent panel 20, diffuser plate 22, air layer 24, structural sheet 26 and 26 ' and grating 28, the light that sends by electroluminescent panel 20, via the diffuser plate 22 of top and the effect of double-layer structure layer 26 and 26 ', with light evenly and cover to the surface, top, the used structural sheet diaphragm of this kind framework is simple prismatic structure, though using prismatic structure can concentrate light, dwindle angle, but make that easily angle produces total reflection with regard to less light originally, thereby reduce the service efficiency of light.
Therefore, needed is a kind of plane light source module, and it can overcome the shortcoming of prior art, and the present invention can satisfy this demand.
Summary of the invention
Fundamental purpose of the present invention provides a kind of plane light source module, and it utilizes the mode of microstructure to reach the combined optical effect of light harvesting and diffusion, to reach the purpose of effective lifting optical efficiency.
Another object of the present invention provides a kind of plane light source module, and it sees through the making of microstructure cylinder and utilize roll extrusion to produce once-forming and reaches the purpose that reduces production costs.
For reaching above-mentioned purpose, the invention provides a kind of plane light source module, it comprises a composite optical diaphragm and a light source, this composite optical diaphragm has first optical surface and can receive second optical surface of incident light, make this blooming piece material so long as state of the art material that can printing opacity all can; This light source has the surface-emitting type attitude, and in the face of this second optical surface, wherein this composite optical diaphragm also comprises at least one microstructure unit, this microstructure unit is positioned on this first optical surface and by transparent material, for example the acrylic acid of printing opacity (arcylic) based material or ultraviolet hardening resin, polymethylmethacrylate (Polymethyl Methacrylate, PMMA), polycarbonate (PC), cyclic olefin polymer (COC; Cyclicolefin copolymers) or macromolecule transparent resin (Arton) made, this microstructure unit has first side that can spread this incident light and second side that can concentrate this incident light.
Preferably, this first side and this second side are adjacent one another are.
Preferably, this first side is camber line shape.
Preferably, the radius-of-curvature of this first side is in 5 microns～500 microns scope.
Preferably, this first side has non-single curvature.
Preferably, this second side assumes diamond in shape, and this rhombus is chosen as vertical this camber line shape first side or this camber line shape first side of out of plumb.
Preferably, this second side has a vertical height
Preferably, this vertical height is greater than 0 micron and be not more than in 500 microns the scope.
Preferably, this second optical surface is level and smooth optical surface.
Preferably, this second optical surface is coarse optical surface.
Preferably, this composite optical diaphragm comprises two microstructure units adjacent one another are, and is an angle between first side of these microstructure units.
Preferably, this angle is in the scope of 30 degree～140 degree.
Preferably, this plane light source module comprises two composite optical diaphragms, and these composite optical diaphragms overlap each other and are the angle of cut that is not more than 90 degree.
Preferably, this composite optical diaphragm is coating one deck ultraviolet photocureable material on plastic base, then by microstructure mould rolling forming, then forms with UV-irradiation curing.Described ultraviolet photocureable material is the state of the art common used material.
Preferably, this light source is the micromolecule Organic Light Emitting Diode.
Preferably, this light source is the macromolecule Organic Light Emitting Diode.
Preferably, this light source is an electroluminescent panel.
Preferably, this light source is the plane fluorescent tube.
Further understand and approval for having for structure of the present invention and effect thereof, now conjunction with figs. describe in detail as after.
Description of drawings
Figure 1A is the synoptic diagram of a prior art;
Figure 1B is the synoptic diagram of another prior art;
Fig. 2 is the synoptic diagram of another prior art;
Fig. 3 A is the optical characteristics synoptic diagram of rhombus lens;
Fig. 3 B is the optical characteristics synoptic diagram of arc shaped lens;
Fig. 4 A is the composite optical diaphragm stereographic map among the present invention;
Fig. 4 B among Fig. 4 A along drawing in side sectional elevation that A-A looked;
Fig. 4 C among Fig. 4 A along drawing in side sectional elevation that B-B looked;
Fig. 5 is the processing synoptic diagram of the composite optical diaphragm among the present invention;
Fig. 6 is the synoptic diagram of an alternate embodiment of the composite optical diaphragm among the present invention;
Fig. 7 is the schematic cross section of plane light source module of the present invention;
Fig. 8 is the schematic cross section of plane light source module of the present invention, and it shows another embodiment;
Fig. 9 is the storehouse synoptic diagram of the composite optical diaphragm among the present invention;
Figure 10 is the drawing in side sectional elevation of the composite optical diaphragm among the present invention, and it shows another embodiment; And
Figure 11 is the drawing in side sectional elevation of the composite optical diaphragm among the present invention, and it shows another embodiment.
Drawing reference numeral explanation: 7-plane light source module; The 8-plane light source module; The 10-diamond structure; The 12-diamond structure; The 14-transparency carrier; The 16-resin particle; 18-sticks together resin; The 20-electroluminescent panel; The 22-diffuser plate; The 24-air layer; The 26-structural sheet; 26 '-structural sheet; The 28-grating; 30-water chestnut mirror; The 32-incident light; The 34-lens; The 36a-incident light; The 36b-incident light; The 36c-incident light; The 36d-incident light; The 38-assembling area; The 40-composite optical diaphragm; 42-first optical surface; 44-second optical surface; The 46-diamond-shaped element; 48-camber line shape unit; The 50-plastic base; The 52-ultraviolet photocureable material; 54-microstructure mould; The 56-cylinder; The 60-minimum unit; The 70-light source; The 72-composite optical diaphragm; The 80-light source; The 82-composite optical diaphragm; The 84-composite optical diaphragm; The 400-microstructure unit; The 402-side; The 404-side; The 440-particle; The 700-incident light; The 800-incident light; The a-angle; The b-radius-of-curvature; The h-vertical height; θ-angle; α-angle.
Embodiment
Describes the present invention hereinafter with reference to the accompanying drawing of enclosing and be employed technological means and the effect of achieving the goal, and the cited embodiment of the following drawings only is an aid illustration that in order to understanding, but technological means of the present invention is not limited to cited accompanying drawing.
See also Fig. 3 A, diamond structure has good collection characteristics (dwindling the dispersion angle of dispersing light source) on optical effect; According to taking charge of like this law (Snell ' s Law), after incident light 32 is injected water chestnut mirror 30, if angle θ is greater than the cirtical angle of total reflection, then incident light 32 can be by total reflection (dotted arrow among Fig. 3 A) in this water chestnut mirror 30, if angle θ is less than the cirtical angle of total reflection, then incident light 32 is penetrating these water chestnut mirror 30 backs (solid arrow among Fig. 3 A) off-normal (dotted line among Fig. 3 A) once more, thereby reaches the light harvesting effect.
Arcuate structure then can show the scattering nature of effective range because of lens peculiarity on optical effect, shown in Fig. 3 B, as incident light 36a, when after incident light 36b, the incident light 36c of axle and incident light 36d inject lens 34, can converge at assembling area 38 earlier and then disperse; Utilize this characteristic can reach the beam angle convergence of big incident angle light and the purpose of homogenising (obfuscation).
Composite optical diaphragm proposed by the invention has the composite effect that spreads with light harvesting to light source, and the surface of this composite optical diaphragm mainly is made up of the microstructure with above-mentioned two kinds of geometric properties, and meaning promptly is made up of diamond structure and arcuate structure.Therefore, see through the combination that is staggered of these two kinds of structures, can produce the double effects of light harvesting and diffusion light source.
Fig. 4 A is the stereographic map of the composite optical diaphragm among the present invention, this composite optical diaphragm 40 has first optical surface 42 (seeing also Fig. 4 B and Fig. 4 C) and second optical surface 44 (seeing also Fig. 4 B and Fig. 4 C), this second optical surface 44 is used to receive incident light (not shown), be formed with several microstructure units 400 on this first optical surface 42, but this microstructure unit 400 has the side 402 that can concentrate incident light and the another side 404 of diffusion into the light emitted, this side 402 is adjacent one another are with this side 404, in present embodiment, this microstructure unit 400 has relative two side faces 402 and relative two side faces 404.Fig. 4 B among Fig. 4 A along drawing in side sectional elevation that A-A looked, wherein this side 402 (not shown) is to assume diamond in shape and have a vertical height h, and two 400 adjacent of microstructure units have an angle a (meaning the angle of 404 of two adjacent sides), and this angle a is preferably in the scope of 30 degree～140 degree.
Fig. 4 C among Fig. 4 A along the drawing in side sectional elevation that B-B looked, wherein this side 404 (not shown) is camber line shape.And have a radius-of-curvature b, this radius-of-curvature b is preferably in 5 microns～500 microns scope.
As from the foregoing, composition material by suitable selection angle a, radius-of-curvature b, vertical height h and this composite optical diaphragm 40, and utilizing the quantity and the permutations of this microstructure unit 400, we can adjust the light harvesting degree that this composite optical diaphragm 40 shown and the strong and weak ratio of diffusibleness according to the different needs of product.
Fig. 5 is the processing synoptic diagram of the composite optical diaphragm among the present invention.When desire is made this composite optical diaphragm, be prior to coating one deck ultraviolet photocureable material 52 on the plastic base 50, cross this ultraviolet photocureable material 52 with cylinder 56 roll extrusion that are equiped with microstructure mould 54 then, can on this ultraviolet photocureable material 52, form required pattern, shine this ultraviolet photocureable material 52 with ultraviolet light (not shown) then and make its curing, can obtain employed composite optical diaphragm among the present invention.
Certainly, the composite optical diaphragm among the present invention also can have the variation of multiple appearance structure.As shown in Figure 6, the microstructure unit 60 of this composite optical diaphragm also can have less angle and bigger radius-of-curvature; These variations are to set according to the actual needs situation according to the user fully, repeat no more in this.
Fig. 7 is the schematic cross section of plane light source module of the present invention.In Fig. 7, plane light source module 7 comprises a light source 70 and a composite optical diaphragm 72; This light source 70 has the surface-emitting type attitude and can launch an incident light 700, and this composite optical diaphragm 72 is positioned on this light source 70; So, this incident light 700 double effects (for example horizontal visibility or vertical visibility) that (level or vertical) can be concentrated and spread by this composite optical diaphragm 72 on single direction in order to promote display, the display characteristic that makes this plane optical module 7 can promote optical efficiency and have excellence.
Fig. 8 is the schematic cross section of plane light source module of the present invention, and it shows another embodiment.In Fig. 8, each is formed assembly and all is similar to shown in Fig. 7, so repeat no more in this, institute's difference part is that this plane light source module 8 comprises two composite optical diaphragms 82 and 84, and this composite optical diaphragm 82 also can be a special angle α with this composite optical diaphragm 84 except that overlapping each other, as shown in Figure 9; So, the double effects (for example horizontal visibility and vertical visibility) that this incident light 800 can be concentrated simultaneously on two directions and spread by this composite optical diaphragm 82 and 84 in order to promote display simultaneously, the display characteristic that makes this plane light source module 8 can promote optical efficiency and have excellence.
In the present invention, this second optical surface can be level and smooth or coarse optical surface (better for making diffusion effect), when desire is made as rough surface with this second optical surface 44, can be in the particle 440 that is coated with the different-grain diameter size on this composite optical diaphragm 40 or integrally formed when making this composite optical diaphragm 40, as Figure 10 and shown in Figure 11; When repeatedly putting two composite optical diaphragms, these composite optical diaphragms can be the special angle that is not more than 90 degree greater than 0 degree each other.In addition, this light source can be the light source that micromolecule Organic Light Emitting Diode (SMOLED), macromolecule Organic Light Emitting Diode (PLED), electroluminescent panel (EL) or plane fluorescent tube (FFL) etc. have the surface-emitting type attitude.
From the above, plane light source module proposed by the invention has the composite effect of diffusion and light harvesting to light source, can show the optics diffusion function of height controllability, to reach the purpose that replaces traditional light-collecting piece and diffusion sheet simultaneously, when this kind plane light source module is applied in the display, can promote optical efficiency, simplify module architectures and reduce the module cost, have the product of competitive power for this reason in the technical field.
The above only is preferred embodiment of the present invention, can not with the scope implemented of qualification the present invention.Be that all equalizations of doing according to claim of the present invention change and modify, all should still belong in the scope that claim of the present invention contains.
Claims (11)
1. a plane light source module is characterized in that, comprises:
One composite optical diaphragm, it has first optical surface that is oppositely arranged and second optical surface that receives incident light, and this composite optical diaphragm also comprises the microstructure unit of a plurality of longitudinal and transverse arrangements, this microstructure unit is positioned on this first optical surface and is made by transparent material, and this microstructure unit has first side of this incident light of diffusion and second side of concentrating this incident light; Wherein, this first side and this second side are adjacent to each other successively, and
One provides the light source of surface-emitting type attitude, and this surface of light source is to this second optical surface.
2. plane light source module as claimed in claim 1 is characterized in that, this first side is camber line shape, and the radius-of-curvature of this first side is in 5 microns～500 microns scope.
3. plane light source module as claimed in claim 1 is characterized in that, this first side has non-single curvature.
4. plane light source module as claimed in claim 2 is characterized in that, this second side assumes diamond in shape, and this rhombus is chosen as vertical this and is first side of camber line shape or out of plumb this is first side of camber line shape.
5. plane light source module as claimed in claim 1 is characterized in that, this second side has a vertical height, and this vertical height is greater than 0 micron and be not more than in 500 microns the scope.
6. plane light source module as claimed in claim 1 is characterized in that, comprises two microstructure units adjacent one another are, and is an angle between second side of these microstructure units, and this angle is in the scope of 30 degree～140 degree.
7. plane light source module as claimed in claim 1, it comprises two composite optical diaphragms, and these composite optical diaphragms overlap each other and are the angle of cut that is not more than 90 degree.
8. plane light source module as claimed in claim 1 is characterized in that, this composite optical diaphragm is coating one deck ultraviolet photocureable material on plastic base, then by microstructure mould rolling forming, then solidifies with UV-irradiation.
9. plane light source module as claimed in claim 1 is characterized in that, this light source be micromolecule Organic Light Emitting Diode and macromolecule Organic Light Emitting Diode one of them.
10. plane light source module as claimed in claim 1 is characterized in that, this light source is an electroluminescent panel.
11. plane light source module as claimed in claim 1 is characterized in that, this light source is the plane fluorescent tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101048668A CN100480813C (en) | 2005-09-21 | 2005-09-21 | Planar light source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101048668A CN100480813C (en) | 2005-09-21 | 2005-09-21 | Planar light source module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1936674A CN1936674A (en) | 2007-03-28 |
| CN100480813C true CN100480813C (en) | 2009-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101048668A Expired - Fee Related CN100480813C (en) | 2005-09-21 | 2005-09-21 | Planar light source module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI738458B (en) * | 2020-08-12 | 2021-09-01 | 達運精密工業股份有限公司 | Optical plate and display apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020003593A1 (en) * | 1997-02-18 | 2002-01-10 | Fumihiro Arakawa | Polarization light splitting film, backlight system and liquid crystal display |
| US6538819B2 (en) * | 1997-03-10 | 2003-03-25 | Semiconductor Energy Laboratory Co., Ltd. | Laser optical apparatus |
| US20050002204A1 (en) * | 2003-07-04 | 2005-01-06 | Kun-Lung Lin | Module for uniforming light |
-
2005
- 2005-09-21 CN CNB2005101048668A patent/CN100480813C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020003593A1 (en) * | 1997-02-18 | 2002-01-10 | Fumihiro Arakawa | Polarization light splitting film, backlight system and liquid crystal display |
| US6538819B2 (en) * | 1997-03-10 | 2003-03-25 | Semiconductor Energy Laboratory Co., Ltd. | Laser optical apparatus |
| US20050002204A1 (en) * | 2003-07-04 | 2005-01-06 | Kun-Lung Lin | Module for uniforming light |
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|---|---|
| CN1936674A (en) | 2007-03-28 |
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Correction item: Fourth inventor Correct: Fu Chunneng False: Bo Chunneng Number: 16 Page: 1447 Volume: 25 |
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Correction item: Fourth inventor Correct: Fu Chunneng False: Bo Chunneng Number: 16 Page: The title page Volume: 25 |
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Free format text: CORRECT: THE FOURTH INVENTOR; FROM: BO CHUNNENG TO: FU CHUNNENG |
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Granted publication date: 20090422 |