CN1920633A - Flat light source module - Google Patents
Flat light source module Download PDFInfo
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- CN1920633A CN1920633A CN 200510092904 CN200510092904A CN1920633A CN 1920633 A CN1920633 A CN 1920633A CN 200510092904 CN200510092904 CN 200510092904 CN 200510092904 A CN200510092904 A CN 200510092904A CN 1920633 A CN1920633 A CN 1920633A
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- light source
- source module
- light
- optical surface
- circular arc
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Abstract
The invention relates to a plane light source module, which comprises a compound optical membrane and a light resource, wherein said membrane has first optical surface and second optical surface for receiving one incident light; said light resource has surface lighting state and faces said second optical surface; the membrane has one disperse part and one collecting part; the disperse part is made from transparent material to disperse the incident light; the collecting part is made from transparent material to collect the incident light; said disperse part and collecting part are contacted parallel at the first optical surface.
Description
Technical field
The present invention relates to a kind of plane light source module, especially relate 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 arranged at same rete with diffusion component and light-collecting component.
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 image display, so must add that a planar light source can make the clear picture on the liquid crystal panel manifest at its rear.And in order to realize this purpose, the light of this planar light source must 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.Planar light source comprises 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 generally 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) case US6,091, No. 547 disclosed brilliance control films (Luminance Control Film), utilize two prismatic structures 10 and 12 of fitting to reach the purpose of control light, guide lights, made light concentrate, increased the brightness of forward light; Though this structure can be concentrated light effectively, yet can't reach the purpose of diffusion.
See also Figure 1B, be JP2001324608 number disclosed scattering sheet of Jap.P. case (Light-Diffusing Sheet).The resin particle 16 that the distribution particle size is different on a transparency carrier 14 is also fixing to stick together resin 18, produces the purpose that mixed and disorderly scattering reaches the light diffusion after making light by this scattering sheet; 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) case US6,052, No. 164 disclosed electroluminescent display (Electroluminescent display with brightness enhancement) with reinforcement brightness.This structure comprises electroluminescent panel 20, diffuser plate 22, air layer 24, structural sheet 26 and 26 ' and Liquid crystal module 28, the light that sends by electroluminescent panel 20, via the diffuser plate 22 of top and the effect of two structural sheets 26 and 26 ', with light even and concentrated shine top surface.The used structural sheet diaphragm of this kind framework is simple prismatic structures, though use prismatic structures light can be concentrated, dwindles angle, makes that easily angle produces total reflection with regard to less light originally, thereby reduces the service efficiency of light.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of plane light source module, achieves the complex optics effect that converges and spread, to reach the purpose of effective lifting optical efficiency.
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 one first optical surface and one second optical surface that can receive an incident light; This light source has the luminous form of face and faces this second optical surface.Wherein this composite optical diaphragm comprises:
One diffusion part is made and can be spread this incident light by transparent material;
One light collecting portion is made and can be concentrated this incident light by transparent material, this diffusion part and this light collecting portion each other side by side against and be positioned on this first optical surface.
This diffusion part comprises a circular arc cylindrical unit with circular arc column construction degree of depth at least.
This circular arc column construction degree of depth is in 10 microns～500 microns scope.
This light collecting portion comprises a prismatic unit with drift angle at least.
This drift angle is in the scope of 30 degree～140 degree.
This second optical surface is level and smooth optical surface.
This second optical surface is coarse optical surface.
This plane light source module comprises two composite optical diaphragms, and these two composite optical diaphragms overlap each other and present the angle that is less than or equal to 90 degree.
This light source is the micromolecule Organic Light Emitting Diode.
This light source is the macromolecule Organic Light Emitting Diode.
This light source is electroluminescence.
This light source is the plane fluorescent tube.
The present invention has light simultaneously and spreads the function that converges with light, and presents the complex light effect.And the brightness height is evenly distributed, and light utilization is good, slightly diversity.Thereby the clear picture on the liquid crystal panel is manifested.
Description of drawings
Figure 1A is the synoptic diagram of an original technology;
Figure 1B is the synoptic diagram of another original technology;
Fig. 2 is the synoptic diagram of another original technology;
Fig. 3 A is the optical characteristics synoptic diagram of prism;
Fig. 3 B is the optical characteristics synoptic diagram of spherical mirror;
Fig. 4 is the drawing in side sectional elevation of the composite optical diaphragm among the present invention;
Fig. 5 is the synoptic diagram of an alternate embodiment of the composite optical diaphragm among the present invention;
Fig. 6 is the synoptic diagram of another 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;
Fig. 9 is the folded synoptic diagram of establishing 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;
Figure 11 is the drawing in side sectional elevation of the composite optical diaphragm among the present invention.
Wherein, Reference numeral:
7-plane light source module 8-plane light source module
10-prismatic structures 12-prismatic structures
14-transparency carrier 16-resin particle
18-sticks together resin 20-electroluminescent panel
22-diffuser plate 24-air layer
26-structural sheet 26 '-structural sheet
28-Liquid crystal module 30-prism
32-incident light 34-lens
36a-incident light 36b-incident light
36c-incident light 36d-incident light
38-assembling area 40-composite optical diaphragm
The 42-first optical surface 44-second optical surface
The prismatic unit of 46-48-circular arc cylindrical unit
60-minimum unit 62-minimum unit
70-light source 72-composite optical diaphragm
80-light source 82-composite optical diaphragm
84-composite optical diaphragm 440-particle
700-incident light 800-incident light
The a-drift angle b-circular arc column construction degree of depth
θ-angle [alpha]-angle
Embodiment
Below describe conjunction with figs. in detail technical characterictic of the present invention and effect.But appended accompanying drawing and illustrated embodiment only are aid illustration, in order to deep understanding essence of the present invention, are not in order to limit the present invention.
See also Fig. 3 A, prism 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 prism 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 prism 30, if angle θ is less than the cirtical angle of total reflection, then incident light 32 is penetrating these prism 30 backs (solid arrow among Fig. 3 A) off-normal (dotted line among Fig. 3 A) once more, thereby reaches the light harvesting effect.
The spherical mirror structure then shows 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 (being the spherical mirror structure herein), 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 diffusion and the composite effect that converges 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, promptly is made up of prismatic unit and circular arc cylindrical unit.Therefore, by the combination that is staggered of these two kinds of structures, can produce light source and converge and the double effects that spreads.
See also Fig. 4, it is the drawing in side sectional elevation of the composite optical diaphragm among the present invention.This composite optical diaphragm 40 has one first optical surface 42 and one second optical surface 44.This second optical surface 44 is used to receive incident light, and a prismatic unit 46 and a circular arc cylindrical unit 48 are staggered on this first optical surface 42.This prismatic unit 46 is used for concentrating light, is light collecting portion, and 48 of this circular arc cylindrical unit are used to spread light, are diffusion part.This prismatic unit 46 has a drift angle a, and this circular arc cylindrical unit 48 has a circular arc column construction degree of depth b.By this drift angle of suitable selection a, this circular arc column construction degree of depth b, the composition material (promptly selecting suitable refractive index) of this composite optical diaphragm 40 and the number ratio of prismatic unit and circular arc cylindrical unit, 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.
Certainly, this composite optical diaphragm is non-only to be confined to the prismatic unit circular arc cylindrical unit of arranging in pairs or groups, and also can have multiple collocation to change.As Fig. 5 and shown in Figure 6, the minimum unit 60 of this composite optical diaphragm can be four circular arc cylindrical unit of a prismatic unit collocation; Or the minimum unit of this composite optical diaphragm 62 can be three circular arc cylindrical unit of two prismatic unit collocation, and the user can change according to actual needs and set fully, repeats 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 luminous form of face and can launch an incident light 70), this composite optical diaphragm 72 be positioned at this light source 70 on; So, this incident light 700 (level or vertical) on single direction can be converged and the double effects that spreads (for example horizontal visibility or the vertical visibility in order to promote display) display characteristic that makes this plane optical module 7 can promote optical efficiency and have excellence by this composite optical diaphragm 72.
Fig. 8 is the schematic cross section of plane light source module of the present invention, and it shows another embodiment.Among Fig. 8, each assembly 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, this incident light 800 can be converged on two directions and the double effects that spreads (for example horizontal visibility and the vertical visibility in order to promote display simultaneously) simultaneously by this composite optical diaphragm 82 and 84, the display characteristic that makes this plane light source module 8 can promote optical efficiency and have excellence.
In the present invention, the circular arc column construction degree of depth of this circular arc cylindrical unit is in 10 microns～500 microns scope, and this circular arc column construction degree of depth and width each other can (promptly this circular arc cylindrical unit can have different curvature radius or non-single radius-of-curvature structure) inequality, and the drift angle of this prismatic unit is in the scopes of 30 degree～140 degree and this prismatic unit can have symmetrical or asymmetric structure and its width to each other can be inequality; 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 to be coated with the different particle 440 of particle size or integrally formed when making this composite optical diaphragm 40 on the composite optical diaphragm 40 in this microstructure optical modulation assembly, as Figure 10 and shown in Figure 11; When stacked two composite optical diaphragms, this composite optical diaphragm can present each other greater than 0 degree and smaller or equal to the special angles of 90 degree.In addition, this light source can be the light source that micromolecule Organic Light Emitting Diode (SMOLED), macromolecule Organic Light Emitting Diode (PLED), electroluminescence (EL) or plane fluorescent tube (FFL) etc. have the luminous form of face.
From the above, plane light source module proposed by the invention has diffusion and the composite effect that converges 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, become the product that has competitive power in the technical field.
The above only is preferred embodiment of the present invention, when not limiting the scope that the present invention implements.The i.e. equivalence of doing according to claim of the present invention generally changes and revises, and all should still belong in the scope that the present invention contains.
Claims (12)
1, a kind of plane light source module is characterized in that, comprises:
One composite optical diaphragm, it has one first optical surface and one second optical surface that can receive an incident light, and first optical surface has:
One diffusion part is made and can be spread this incident light by transparent material;
One light collecting portion is made and can be concentrated this incident light by transparent material, this light collecting portion and above-mentioned diffusion part each other side by side against and be positioned on this first optical surface;
One has the light source of the luminous form of face, and its light source can be launched an incident light to this second optical surface.
2, plane light source module as claimed in claim 1 is characterized in that, this diffusion part comprises at least one circular arc cylindrical unit.
3, plane light source module as claimed in claim 2 is characterized in that, this circular arc cylindrical unit has a circular arc column construction degree of depth.
4, plane light source module as claimed in claim 3 is characterized in that, this circular arc column construction degree of depth is in 10 microns～500 microns scope.
5, plane light source module as claimed in claim 1 is characterized in that, this light collecting portion comprises at least one prismatic unit.
6, plane light source module as claimed in claim 5 is characterized in that, this prismatic unit has a drift angle.
7, plane light source module as claimed in claim 6 is characterized in that, this drift angle is in the scope of 30 degree～140 degree.
8, plane light source module as claimed in claim 1 is characterized in that, comprises two composite optical diaphragms, and these two composite optical diaphragms overlap each other and present the angle that is less than or equal to 90 degree.
9, plane light source module as claimed in claim 1 is characterized in that, this first optical surface is made up of four circular arc cylindrical unit of a prismatic unit collocation.
10, plane light source module as claimed in claim 1 is characterized in that, this first optical surface is made up of three circular arc cylindrical unit of two prismatic unit collocation.
11, plane light source module as claimed in claim 1 is characterized in that, this composite optical diaphragm is made up of two composite optical diaphragms.
12, plane light source module as claimed in claim 11 is characterized in that, these two composite optical diaphragms overlap each other and can be a special angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100929042A CN100445831C (en) | 2005-08-24 | 2005-08-24 | Flat light source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100929042A CN100445831C (en) | 2005-08-24 | 2005-08-24 | Flat light source module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1920633A true CN1920633A (en) | 2007-02-28 |
| CN100445831C CN100445831C (en) | 2008-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100929042A Active CN100445831C (en) | 2005-08-24 | 2005-08-24 | Flat light source module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100445831C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427975C (en) * | 2006-12-21 | 2008-10-22 | 友达光电股份有限公司 | Backlight module and diffusion board structure used thereby |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5948744A (en) * | 1982-09-13 | 1984-03-21 | Mitsubishi Rayon Co Ltd | Back projection screen |
| EP0941500A1 (en) * | 1997-09-26 | 1999-09-15 | Koninklijke Philips Electronics N.V. | Image projection screen |
| KR100725011B1 (en) * | 2003-11-12 | 2007-06-04 | 엘지전자 주식회사 | Prism sheet and back light assembly |
| KR100717499B1 (en) * | 2003-11-12 | 2007-05-14 | 엘지전자 주식회사 | Prism sheet, back light assembly and display device |
| KR100487105B1 (en) * | 2004-06-04 | 2005-05-04 | 주식회사 엘지에스 | Optical film |
-
2005
- 2005-08-24 CN CNB2005100929042A patent/CN100445831C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427975C (en) * | 2006-12-21 | 2008-10-22 | 友达光电股份有限公司 | Backlight module and diffusion board structure used thereby |
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| Publication number | Publication date |
|---|---|
| CN100445831C (en) | 2008-12-24 |
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