CN103791440A - Lens and light source module provided with lens - Google Patents
Lens and light source module provided with lens Download PDFInfo
- Publication number
- CN103791440A CN103791440A CN201210423123.7A CN201210423123A CN103791440A CN 103791440 A CN103791440 A CN 103791440A CN 201210423123 A CN201210423123 A CN 201210423123A CN 103791440 A CN103791440 A CN 103791440A
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- Prior art keywords
- lens
- light source
- curved surface
- light
- joint face
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Abstract
The invention relates to a lens for correcting light rays emitted by a light source. The lens comprises a first curved surface and a second curved surface which sequentially cover the light source, wherein the bottom peripheries of the first curved surface and the second curved surface are connected through a connecting face. The first curved surface comprises a bottom and a middle portion, wherein the bottom sinks from the connecting face to the inside of the lens, and the middle portion further sinks from the top end of the bottom to the lens. The first curved surface further comprises a platform portion, wherein the platform portion is located at the top end of the middle portion of the first curved surface. The invention further relates to a light source module provided with the lens.
Description
Technical field
The present invention relates to optical field, relate in particular to a kind of lens and there is the light source module of these lens.
Background technology
Utilize its effect of light fixture of conventional light source substantially can meet the demand of various aspects, still power consumption is too large, and therefore light emitting diode (LED, Light Emitting Diode) has the trend that replaces gradually conventional light source as light source of new generation.
In existing LED light source module conventionally light source outside covering one lens with the angular distribution of original light of being used for changing light source and sending.Existing lens generally comprise two curved surfaces, near a less curved surface of light source and away from light source one compared with large curved surface, compared with large curved surface, less curved surface is covered at completely compared with large curved surface inside.In order to make forward light that light emitting diode sends towards lateral deflection, increase side direction light thereby reduce forward light intensity simultaneously, less curved surface forms a tip conventionally away from the position on light source top.But this tip is because thereby the excessive tip that makes of curved surface slope around, summit is too sharp-pointed, and easily cause not easy-formation, or in the time of ejection formation demoulding, easily produce defect and cause the change of optical effect.
Summary of the invention
In view of this light source module that, is necessary to provide a kind of lens of easily moulding and adopts these lens.
A kind of lens, it is proofreaied and correct for the light that light source is sent, these lens comprise for being located at successively first surface and the second curved surface on light source, the bottom peripheral edge of this first surface and the second curved surface is connected by a joint face, this first surface comprises bottom and middle part, and this bottom is from joint face to lens sunken inside, further caves in to lens from the top of bottom in this middle part, this first surface also comprises platform part, and this platform part is positioned at the top at the middle part of first surface.
A kind of lens, it is proofreaied and correct for the light that light source is sent, these lens comprise for being located at successively first surface and the second curved surface on light source, this first surface comprises bottom and middle part, this distance from bottom light source is nearest, and this middle part is from the top of bottom to lens recess, and this first surface also comprises platform part, this platform part is positioned at the top at the middle part of first surface, parallel with light source just right.
A kind of light source module that comprises lens as above.
The light source module of the lens of embodiment of the present invention and this kind of lens of employing, because the top at the middle part of the first surface of lens forms a platform part, form a summit because the formation of this platform part does not intersect the top at middle part, thereby can there is not easy-formation, the demoulding because of the existence on this summit in the process of making these lens time, produce the problem of defect.
Accompanying drawing explanation
The schematic perspective view of the lens in the light source module that Fig. 1 provides for embodiment of the present invention.
Fig. 2 is that the lens in Fig. 1 coordinate the light source module of light source composition along the cutaway view of II-II direction in Fig. 1.
Main element symbol description
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100 |
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10 |
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20 |
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21 |
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211 |
| Middle part | 212 |
| Platform part | 213 |
| The second |
22 |
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221 |
| Cambered |
222 |
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223 |
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23 |
The following specific embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
The specific embodiment
Refer to Fig. 1 and Fig. 2, the light source module 100 that embodiment of the present invention provides comprises light source 10 and lens 20.Described light source 10 is light emitting diode.
Described lens 20 comprise first surface 21, the second curved surface 22 and the joint face 23 that is connected this first surface 21 and the second curved surface 22.Described the second curved surface 22 is located at first surface 21 tops, and both bottom peripheral edge is in the same plane and connected by joint face 23.
Described first surface 21 is directly located on light source 10.This first surface 21 comprises a bottom 211, middle part 212 and platform part 213.This bottom 211 is from joint face 23 to lens 20 inner recess, and this bottom 211 is nearest apart from light source 10, and in the present embodiment, the profile of this bottom 211 is an ellipsoid.This middle part 212 is the further entity inner recess to lens 20 from the top of bottom 211.The slope in the cross section of this bottom 211 reduces on the optical axis direction along lens 20 gradually from joint face 23, and the slope in the cross section at this middle part 212 from the top of bottom 211 along increasing gradually on the optical axis direction of lens 20.That is to say, bottom 211 is positioned at middle part 212 convergents of 211 tops, bottom along optical axis direction from joint face 23, and the convergent of this bottom 211 is to mild by precipitous; 212 tops from bottom 211, middle part are positioned at platform part 213 convergents on 212 tops, middle part along optical axis direction, the convergent at this middle part 212 is to have gently to precipitous.This platform part 213 is formed at 212 top, middle part, that is, middle part 212, is continued horizontal-extending and formed this platform part 213 along caving in after certain distance on the optical axis direction of lens 20 from the top of bottom 211.In the present embodiment, this platform part 213 parallels with joint face 23, and this platform part 213 is parallel with light source 10 just right.The plan view shape of this platform part 213 is roughly a circle that radius is less.
Described the second curved surface 22 is located at first surface 21 tops.This second curved surface 22 comprises the cambered surface 222 of the concave surface 221, concave surface 221 peripheries that are positioned at center of top and the side 223 around lens 20 sidepieces.This concave surface 221 is positioned at the central authorities of lens 20, and the platform part 213 to first surface 21 just.This concave surface 221 can be the arc surface of indent etc., for dispersing the forward light that arrives concave surface 221.This cambered surface 222 is the curved surface protruding to the direction away from light source 10, and the curvature of this cambered surface 222 is greater than the curvature of concave surface 221.The bottom peripheral edge of the bottom peripheral edge of this second curved surface 22 and first surface 21 is co-located on joint face 23, and both are connected by joint face 23.
Described joint face 23 is near light source 10, and it connects the bottom peripheral edge of first surface 21 and the second curved surface.
When this first surface 21 of light directive that light source 10 sends, reflect through bottom 211, middle part 212 and the platform part 213 of first surface 21 respectively.Because platform part 213 is positioned at first surface 21 center, and the area of this platform part 213 is less, therefore a small amount of forward light A that light source 10 sends is through the concave surface 221 of direct directive second curved surface 22 of refraction of platform part 213, and further under the refraction of this concave surface 221 to lateral deflection.Be positioned at other light middle part 212 and bottom 211 of directive first surface 21 respectively of this light A periphery.Because the slope at middle part 212 increases gradually from the top of bottom 211, after the refraction action at middle part 212, there is larger deflection to lens 20 sidepieces in the light B at directive middle part 212, thereby the light B at directive middle part 212 is disperseed to lens 20 side direction, and the cambered surface 222 of further directive the second curved surface 22, thereby further disperse to side direction, be conducive to make outgoing equalizing light rays.Be positioned at the light C of light B periphery through the cambered surface 222 of refraction directive second curved surface 22 of the bottom 211 of first surface 21, through the refraction of cambered surface 222, disperse to the side direction of lens 20.
The light source module 100 of the lens 20 of embodiment of the present invention and this kind of lens 20 of employing, because the top at the middle part 212 of its first surface 21 forms a platform part 213, form a summit because the formation of this platform part 213 does not intersect the top at the middle part 212 that slope increases gradually, thereby can there is not easy-formation, the demoulding because of the existence on this summit in the process of making these lens 20 time, produce the problem of defect.Meanwhile, owing to being positioned at the top at the middle part 212 of first surface 21 to platform part 213, its area is less, and the function influence that therefore 212 pairs, middle part light is carried out to lateral deflection is little, can meet the uniform requirement of bright dipping.
Be understandable that, for the person of ordinary skill of the art, can make change and the distortion that other various pictures are answered 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 (9)
1. lens, it is proofreaied and correct for the light that light source is sent, these lens comprise for being located at successively first surface and the second curved surface on light source, the bottom peripheral edge of this first surface and the second curved surface is connected by a joint face, this first surface comprises bottom and middle part, and this bottom is from joint face to lens sunken inside, further caves in to lens from the top of bottom in this middle part, it is characterized in that: this first surface also comprises platform part, this platform part is positioned at the top at the middle part of first surface.
2. lens as claimed in claim 1, is characterized in that: the slope in the cross section of described bottom reduces on the optical axis direction along lens gradually from joint face, the slope in the cross section at this middle part by the top of bottom along increasing gradually on the optical axis direction of lens.
3. lens as claimed in claim 1, is characterized in that: the profile of described bottom is an ellipsoid.
4. the lens as described in claims 1 to 3 any one, is characterized in that: described platform part parallels with joint face.
5. lens as claimed in claim 4, is characterized in that: described platform part be shaped as a circle.
6. lens as claimed in claim 1 or 2, it is characterized in that: described the second curved surface is located at first surface top, this second curved surface comprises the cambered surface of the concave surface, the concave surface periphery that are positioned at center of top and the side around lens sidepiece, this concave surface is towards the direction depression of light source, this cambered surface is protruded to the direction away from light source, and the bottom margin of this side is positioned on joint face.
7. lens, it is proofreaied and correct for the light that light source is sent, these lens comprise for being located at successively first surface and the second curved surface on light source, this first surface comprises bottom and middle part, this distance from bottom light source is nearest, and this middle part, is characterized in that: this first surface also comprises platform part to lens recess from the top of bottom, this platform part is positioned at the top at the middle part of first surface, parallel with light source just right.
8. a light source module, it comprises light source and the lens as described in claim 1-7.
9. light source module as claimed in claim 8, is characterized in that: described light source is light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423123.7A CN103791440A (en) | 2012-10-30 | 2012-10-30 | Lens and light source module provided with lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210423123.7A CN103791440A (en) | 2012-10-30 | 2012-10-30 | Lens and light source module provided with lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103791440A true CN103791440A (en) | 2014-05-14 |
Family
ID=50667357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210423123.7A Pending CN103791440A (en) | 2012-10-30 | 2012-10-30 | Lens and light source module provided with lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103791440A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090225552A1 (en) * | 2008-03-10 | 2009-09-10 | National Central University | Light source-modulating device having composite curved surfaces |
| JP2010186142A (en) * | 2009-02-13 | 2010-08-26 | Panasonic Corp | Lens for illumination, light emitter, surface light source, and liquid crystal display device |
| CN101852388A (en) * | 2010-06-23 | 2010-10-06 | 深圳市九洲光电科技有限公司 | Wide-angle light-distribution lens for LEDs and application thereof |
| CN102369390A (en) * | 2010-02-02 | 2012-03-07 | 松下电器产业株式会社 | Flat light source device, liquid crystal display device, and lens |
| CN202371634U (en) * | 2011-12-28 | 2012-08-08 | 东莞雷笛克光学有限公司 | Uniform light lens |
-
2012
- 2012-10-30 CN CN201210423123.7A patent/CN103791440A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090225552A1 (en) * | 2008-03-10 | 2009-09-10 | National Central University | Light source-modulating device having composite curved surfaces |
| JP2010186142A (en) * | 2009-02-13 | 2010-08-26 | Panasonic Corp | Lens for illumination, light emitter, surface light source, and liquid crystal display device |
| CN102369390A (en) * | 2010-02-02 | 2012-03-07 | 松下电器产业株式会社 | Flat light source device, liquid crystal display device, and lens |
| CN101852388A (en) * | 2010-06-23 | 2010-10-06 | 深圳市九洲光电科技有限公司 | Wide-angle light-distribution lens for LEDs and application thereof |
| CN202371634U (en) * | 2011-12-28 | 2012-08-08 | 东莞雷笛克光学有限公司 | Uniform light lens |
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Application publication date: 20140514 |