CN104251395A - Lens, light source device adopting same and light source module - Google Patents
Lens, light source device adopting same and light source module Download PDFInfo
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- CN104251395A CN104251395A CN201310264328.XA CN201310264328A CN104251395A CN 104251395 A CN104251395 A CN 104251395A CN 201310264328 A CN201310264328 A CN 201310264328A CN 104251395 A CN104251395 A CN 104251395A
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- lens
- light source
- oblique section
- main exiting
- periphery
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Abstract
The invention discloses a lens which is used for being matched with an LED (light-emitting diode) light source. The lens comprises a mounting surface, a main light outlet surface oppositely arranged with the mounting surface, a connecting surface connected with the mounting surface and the main light outlet surface, and a light inlet surface positioned on the mounting surface and concaved to the lens, wherein the main light outlet adopts a convex curved surface; the light inlet surface adopts a concave curved surface; the connecting surface of the lens comprises a plurality of inclined sections arranged along the periphery of the lens; each inclined section inward extends obliquely towards the mounting surface from one side, close to the main light outlet surface, of the connecting surface; the inclined sections are intersected with the mounting surface. In the lens, rays emitted to the inclined sections of the lens and larger than the critical angle of the lens are totally reflected through the inclined sections and then are transmitted to the main light outlet surface, and the density of the rays emitted to the periphery of the main light outlet surface is further improved, so that the LED light source forms polygonal light field with uniformly distributed intensity after being subjected to the refraction of the lens. The invention also relates to a light source device adopting the lens and a light source module.
Description
Technical field
The present invention relates to a kind of lens, use the light supply apparatus of these lens and light source module.
Background technology
Light emitting diode (light emitting diode, LED) as a kind of light emitting source efficiently, there is environmental protection, power saving, life-span length, the more high various features of luminous efficiency, light source usually used as backlight module, room lighting or billboard uses, to replace traditional CCFL(Cold-Cathode Florescent Lamps, cold cathode fluorescent tube) and fluorescent tube.
Light emitting diode has the feature of the narrower and high directivity of high brightness, radiation spectrum, can realize the illumination of given area, and manage and the three-dimensional illumination light source such as fluorescent tube compared to traditional CCFL, the light utilization ratio of light emitting diode is higher.
But the uneven intensity distribution of lambert's type that the luminous far-field distribution due to light emitting diode has, the hot spot that light emitting diode far field is formed is circular, and the middle of hot spot can be brighter, can be dimmed gradually to surrounding.So, enough uniformitys are had in order to keep the illumination of given area, light emitting diode must obtain uniform bright dipping to superpose by close-packed arrays, this will increase the usage quantity of light emitting diode, cause cost increase, or the distance increased between light emitting diode and given area is to produce enough light mixing distance, but this will occupy larger space undoubtedly, be unfavorable for the miniaturization of the devices such as backlight module, room lighting or billboard.
Summary of the invention
In view of this, be necessary to provide a kind of LED light source that can make to reflect the rear lens, the light supply apparatus using these lens and the light source module that form uniform light field and distribute.
A kind of lens, in order to LED light source with the use of, these lens comprise an installed surface, the main exiting surface be oppositely arranged with installed surface, the joint face being connected this installed surface and this main exiting surface and to be positioned on installed surface and towards the incidence surface of lens indent, this main exiting surface is the curved surface of an evagination, this incidence surface is the curved surface of an indent, the joint face of these lens comprises multiple oblique section arranged along lens periphery, each oblique section to slope inwardly extension towards installed surface near the side of main exiting surface from joint face, and described oblique section is all crossing with installed surface.
A kind of light supply apparatus, comprise at least one LED light source and at least one lens, this kind of lens in order to LED light source with the use of, these lens comprise an installed surface, the main exiting surface be oppositely arranged with installed surface, connect the joint face of this installed surface and this main exiting surface and to be positioned on installed surface and towards the incidence surface of lens indent, this main exiting surface is the curved surface of an evagination, this incidence surface is the curved surface of an indent, the joint face of these lens comprises multiple oblique section arranged along lens periphery, each oblique section to slope inwardly extension towards installed surface near the side of main exiting surface from joint face, described oblique section is all crossing with installed surface, this LED light source is arranged towards the incidence surface of lens.
A kind of light source module, comprise multiple substrate be arranged side by side and the light supply apparatus be arranged at respectively on substrate, this light supply apparatus comprises at least one LED light source and at least one lens, this kind of lens in order to LED light source with the use of, these lens comprise an installed surface, the main exiting surface be oppositely arranged with installed surface, connect the joint face of this installed surface and this main exiting surface and to be positioned on installed surface and towards the incidence surface of lens indent, this main exiting surface is the curved surface of an evagination, this incidence surface is the curved surface of an indent, the joint face of these lens comprises multiple oblique section arranged along lens periphery, each oblique section to slope inwardly extension towards installed surface near the side of main exiting surface from joint face, described oblique section is all crossing with installed surface, this LED light source is arranged towards the incidence surface of lens, light supply apparatus in adjacent substrate becomes to be staggered.
Compared with prior art, the oblique section of directive lens in the present invention and the light being greater than lens critical angle are propagated towards main exiting surface after the total reflection of oblique section, and then increase the ray density of the main exiting surface periphery of directive, make LED light source after lens reflection, form the polygon light field of uniform intensity distribution.
Accompanying drawing explanation
Fig. 1 is the perspective view of the light supply apparatus of one embodiment of the invention.
The inverted perspective view that Fig. 2 is light supply apparatus shown in Fig. 1, wherein LED light source is hidden.
Fig. 3 is for light supply apparatus shown in Fig. 1 is along the cross-sectional schematic in III-III line direction.
Fig. 4 is for light supply apparatus shown in Fig. 1 is along the cross-sectional schematic in IV-IV line direction.
The optical field distribution schematic diagram of the light source module that Fig. 5 for light supply apparatus shown in Fig. 1 is arranged in, substrate is formed.
Main element symbol description
| Light supply apparatus | 1 |
| Lens | 2 |
| LED light source | 3 |
| Substrate | 4 |
| Light source module | 5 |
| Installed surface | 20 |
| Main exiting surface | 21 |
| Joint face | 22 |
| Incidence surface | 201 |
| Depressed part | 211 |
| Periphery | 221 |
| Oblique section | 222 |
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Refer to Fig. 1 to Fig. 4, the lens 2 that the light supply apparatus 1 of one embodiment of the invention comprises a LED light source 3 and covers at above this LED light source 3.The main exiting surface 21 that these lens 2 comprise an installed surface 20, be oppositely arranged with installed surface 20, be connected this installed surface 20 and main exiting surface 21 joint face 22 and to be positioned on installed surface 20 and towards the incidence surface 201 of this lens 2 inner recess.The light that this LED light source 3 sends enters lens 2 through incidence surface 201 refraction of these lens 2, wherein inject the most of light in these lens 2 to penetrate from lens 2 after the main exiting surface 21 of lens 2 reflects, the small part light injected in lens 2 then penetrates from lens 2 after the refraction of the joint face 22 of lens 2.The joint face 22 of these lens 2 comprises multiple oblique section 222 arranged along lens 2 periphery.Each oblique section 222 to slope inwardly extension towards installed surface 20 near the side of main exiting surface 21 from joint face 22.Described oblique section 222 is all crossing with installed surface 20, and adjacent intersection head and the tail connect and compose a regular hexagon.
This main exiting surface 21 is the curved surface of an evagination.This incidence surface 201 is positioned at the central authorities of this installed surface 20 and towards the inner recess of these lens 2, this incidence surface 201 is the curved surface of an indent.This LED light source 3 is arranged towards the incidence surface 201 of these lens 2.Main exiting surface 21 and the incidence surface 201 of these lens 2 are axial symmetry face.This incidence surface 201 is symmetrical about the optical axis X of LED light source 3.This main exiting surface 21 is symmetrical about the optical axis X of this LED light source 3.
This incidence surface 201 is an ellipsoid, and the major axis of this incidence surface 201 is positioned on the optical axis X of this LED light source 3; In other embodiments, the shape of this incidence surface 201 can need to adjust according to the bright dipping of reality, such as hemisphere face, parabola or taper seat.This main exiting surface 21 is just forming the depressed part 211 of a back taper towards lens 2 indent to the central authorities of incidence surface 201.Distance between the main exiting surface 21 of these lens 2 and installed surface 20 first increases rear reduction from the periphery of this main exiting surface 21 towards the central authorities of main exiting surface 21.
Described six oblique sections 222 are about the optical axis X Rotational Symmetry of LED light source 3.This installed surface 20 is a horizontal plane, and the angle theta between each oblique section 222 with installed surface 20 is all equal, and this angle theta is an obtuse angle.Preferably, the size of this obtuse angle θ is more than or equal to the critical angle of these lens 2 and direct sum, Ji θ≤θ
c+ 90 °, thus the light of this oblique section 222 of LED light source 3 directive is totally reflected on main exiting surface 21, increase the ray density of directive main exiting surface 21 periphery, improve the light field of LED light source 3 after lens 2 reflect, obtain comparatively uniform light distribution.The critical angle θ of these lens 2
csize relevant with the refractive index of lens 2, such as when the material of lens 2 is PC plastics (polycarbonate plastic), the refractive index of lens 2 is about 1.58, then the critical angle θ of lens 2
cbe about 39.26 °.
This joint face 22 also comprises the periphery 221 connecting described oblique section 222 and main exiting surface 21.The periphery of the autonomous exiting surface 21 of this periphery 221 extends towards installed surface 20.The shape of each oblique section 222 is arc.Each oblique section 222 of this joint face 22 is an arc curve with the intersection of periphery 221.The height that this periphery 221 corresponds to each arc curve position reduces towards the central authorities of arc curve gradually from the two-end-point of this arc curve.
Refer to Fig. 5, for light supply apparatus 1 of the present invention is arranged in the optical field distribution schematic diagram of the light source module 5 that substrate 4 is formed.In Figure 5, multiple substrate 4 is arranged side by side, multiple light supply apparatus 1 to be then installed on substrate 4 and (to be embedded in substrate with the circuit structure on substrate 4, figure does not show) electrical connection, become cycle staggering to arrange to make this light supply apparatus 1 obtain the comparatively large and light field of uniform intensity distribution of an area between the light supply apparatus 1 in adjacent substrate 4.In the present embodiment, the optical field distribution of this light supply apparatus 1 is regular hexagon, by being staggered of light supply apparatus 1 can be formed the uniform light field of a seamless link, avoids occurring illumination dead angle (light fails to irradiate the dark space formed) in light field.
Understandably, oblique section 222 described in the embodiment of the present invention is six, described multiple oblique section 222 is crossing with installed surface 20, and adjacent intersection head and the tail are connected to form regular hexagon, the shape that the number of this oblique section 222 and the intersection head and the tail of oblique section 222 and installed surface 20 are connected to form in other embodiments can be made adjustment as required, the such as number of described oblique section 222 is four or eight, and described oblique section 222 is connected to form quadrangle or octagon with the intersection head and the tail of installed surface 20 accordingly, and according to incidence surface 201 and the change of main exiting surface 21 concrete shape, described multiple oblique section 222 might not about the optical axis X Rotational Symmetry of LED light source 3, such as when ray density skewness in incidence surface 201 and asymmetric the caused lens 2 of main exiting surface 21, now correspond to the ray density larger part in lens 2, angle theta between the oblique section 222 of this lens 2 this position corresponding and installed surface 20 is large compared with the angle theta between the oblique section 222 of other positions of lens 2 and installed surface 20, to improve the ray density distribution in lens 2, obtain uniform optical field distribution.
In the present invention, the joint face 22 of these lens 2 comprises the oblique section 222 of multiple periphery along lens 2 setting, each oblique section 222 to slope inwardly extension towards installed surface 20 near the side of main exiting surface 21 from this joint face 22, described oblique section 222 is all crossing with installed surface 20, and the light that LED light source 3 sends is greater than the critical angle θ of lens 2
clight propagate towards main exiting surface 21 after oblique section 222 is totally reflected, and then increase the ray density of directive main exiting surface 21 periphery, make LED light source 3 after lens 2 reflect, form the polygon light field of a uniform intensity distribution.
Will also be appreciated that for the person of ordinary skill of the art, the change and distortion that other various picture answers can be made by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.
Claims (12)
1. lens, in order to LED light source with the use of, these lens comprise an installed surface, the main exiting surface be oppositely arranged with installed surface, the joint face being connected this installed surface and this main exiting surface and to be positioned on installed surface and towards the incidence surface of lens indent, this main exiting surface is the curved surface of an evagination, this incidence surface is the curved surface of an indent, it is characterized in that: the joint face of these lens comprises multiple oblique section arranged along lens periphery, each oblique section to slope inwardly extension towards installed surface near the side of main exiting surface from joint face, and described oblique section is all crossing with installed surface.
2. lens as claimed in claim 1, is characterized in that: this main exiting surface and incidence surface are axial symmetry face, and this incidence surface is symmetrical about the optical axis of LED light source, and this main exiting surface is symmetrical about the optical axis of described LED light source.
3. lens as claimed in claim 2, is characterized in that: the intersection head and the tail of described oblique section and installed surface connect and compose a polygon, and this polygon is regular polygon, and described multiple oblique section is about the optical axis Rotational Symmetry of LED light source.
4. lens as claimed in claim 3, is characterized in that: this installed surface is a horizontal plane, and the angle between each oblique section with installed surface is equal.
5. lens as claimed in claim 4, it is characterized in that: the angle between each oblique section and this installed surface is obtuse angle, and the size at this obtuse angle are more than or equal to critical angle and the right angle sum of these lens.
6. lens as claimed in claim 4, is characterized in that: this joint face also comprises the periphery connecting described multiple oblique section and main exiting surface, this periphery from this main exiting surface periphery extend towards installed surface.
7. lens as claimed in claim 6, it is characterized in that: the shape of each oblique section is arc, each oblique section of this joint face and the intersection of periphery are an arc curve.
8. lens as claimed in claim 2, is characterized in that: the main exiting surface of these lens just caves inward towards lens to the central authorities of incidence surface.
9. lens as claimed in claim 8, is characterized in that: the incidence surface of these lens is an ellipsoid, and the major axis of this incidence surface is positioned on the optical axis of this LED light source.
10. lens as claimed in claim 8, is characterized in that: the distance between the main exiting surface of these lens and installed surface first increases rear reduction from the periphery of this main exiting surface towards the central authorities of main exiting surface.
11. 1 kinds of light supply apparatuses, comprise at least one LED light source and at least one lens, it is characterized in that: the lens of described lens according to any one of such as claim 1 to 10, described LED light source is arranged towards the incidence surface of lens.
12. 1 kinds of light source modules, comprise multiple substrate be arranged side by side and the light supply apparatus be arranged at respectively on substrate, it is characterized in that: described light supply apparatus is light supply apparatus as claimed in claim 11, and the light supply apparatus in adjacent substrate becomes to be staggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264328.XA CN104251395A (en) | 2013-06-28 | 2013-06-28 | Lens, light source device adopting same and light source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310264328.XA CN104251395A (en) | 2013-06-28 | 2013-06-28 | Lens, light source device adopting same and light source module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104251395A true CN104251395A (en) | 2014-12-31 |
Family
ID=52186544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310264328.XA Pending CN104251395A (en) | 2013-06-28 | 2013-06-28 | Lens, light source device adopting same and light source module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104251395A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056839A (en) * | 2019-04-02 | 2019-07-26 | 福建华佳彩有限公司 | A kind of secondary lens structure with reflecting effect |
| CN110962741A (en) * | 2019-12-26 | 2020-04-07 | 珠海市唯能车灯实业有限公司 | Automobile indoor illuminating lamp capable of uniformly emitting light |
-
2013
- 2013-06-28 CN CN201310264328.XA patent/CN104251395A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056839A (en) * | 2019-04-02 | 2019-07-26 | 福建华佳彩有限公司 | A kind of secondary lens structure with reflecting effect |
| CN110962741A (en) * | 2019-12-26 | 2020-04-07 | 珠海市唯能车灯实业有限公司 | Automobile indoor illuminating lamp capable of uniformly emitting light |
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Application publication date: 20141231 |