WO2013034522A1 - A lens and an illuminating device with the lens - Google Patents
A lens and an illuminating device with the lens Download PDFInfo
- Publication number
- WO2013034522A1 WO2013034522A1 PCT/EP2012/067145 EP2012067145W WO2013034522A1 WO 2013034522 A1 WO2013034522 A1 WO 2013034522A1 EP 2012067145 W EP2012067145 W EP 2012067145W WO 2013034522 A1 WO2013034522 A1 WO 2013034522A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- region
- lens
- illuminating device
- recessed region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0955—Lenses
- G02B27/0961—Lens arrays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
Definitions
- the present invention relates to a lens for an illuminating device.
- the present invention further relates to an illuminating device with the lens.
- the LED illuminating device is used more and more as light source in various environments.
- the luminance of a real light spot formed by light emitted from the LED chip is not uniform due to the manufacturing tolerance of the LED chip.
- the illuminance is not uniform and the color is not uniform, either.
- a lens is usually needed to be installed over the LED chip to adjust light from the LED chip.
- an emergent surface of the lens is structured, that is to say, many randomly distributed bumps or concaves are formed on the emergent surface for forming a diffusive surface, and the diffusive surface ad ⁇ justs the light from the LED chip.
- Another solution is to directly equip a diffusing screen over a top of the lens so as to adjust the light from the LED chip.
- the pre- sent invention further relates to an illuminating device with such lens .
- the first object of the present invention is accomplished via a lens through the following solution.
- the lens comprises a bottom surface and a light emergent surface rising from the bottom surface, a recessed region is formed in a center of the bottom surface, a light incident surface is formed on a surface of the recessed region, a source unit of an illumi ⁇ nating device is provided in the recessed region that is ro- tationally symmetrical in relation to an optical axis of the source unit, wherein the light incident surface is provided with a plurality of annular grooves, and light from the source unit emerges through the light emergent surface after refracted by the annular grooves.
- the light from the source unit is firstly refracted by the light incident surface provided with a plu ⁇ rality of annular grooves.
- a specific configuration and ar ⁇ rangement of the annular grooves can be calculated according to a desired light distributiono
- the recessed region is configured to be conic-like
- the light incident surface is formed on an inner conical surface of the recessed region
- the plurality of annular grooves are respec ⁇ tively formed on a plane of the recessed region perpendicular to the optical axis and arranged adjacent to each other from a bottom to a top of the recessed region.
- each annular groove defines a plane parallel to the plane perpendicular to the optical X.
- Light from the source unit can be adjusted by such annular grooves to expected an ⁇ gles so as to obtain an expected light distribution.
- the top of the recessed region is configured to be spherical surface.
- a light spot generated by the light from the source unit after emerg ⁇ ing from the lens will have almost consistent luminance both at edge and in center, but will not form in the center a region brighter than the edge, so that a uniform light distri- bution is obtained.
- a cross section of the annular groove is a circular arc on a plane through which the optical axis passes.
- Such cross sec ⁇ tion in a circular arc shape is more favorable for a uniform light distribution.
- a semidiameter of the circular arc is 0.1-0.5mm.
- Circular arcs in this range can enable the light distribution to be as uniform as possible.
- the light emergent surface comprises a concave central region and a convex side region, and the central region and the side region are in a smooth transition, wherein the central region and the side region are rotationally symmetrical in relation to the optical axis, respectively.
- Such light emergent sur- face can render an illumination pattern in a specific form while being capable of obtaining a uniform light distribu ⁇ tion.
- the other object of the present invention is accomplished via an illuminating device with such type of lens.
- This illumi- nating device can produce a uniform light distribution.
- a light source of the illuminating device is an LED source unit.
- the LED source unit as a green energy source is fea- tured by a long service life and a high optical efficiency.
- Fig. 1 is a sectional view of a lens according to the present invention ;
- Fig. 2 is an optical pathway diagram of light from a source unit passing through a lens according to the present invention
- Fig. 3 is an enlarged local view of a light incident surface of a lens according to the present invention.
- Fig. 1 is a sectional view of a lens according to the present invention.
- the lens com- prises a bottom surface 1 and a light emergent surface 2 ris ⁇ ing from the bottom surface 1
- a recessed region 3 is formed in a center of the bottom surface 1
- the recessed region 3 is configured to be conic-like as seen from the figure
- a light incident surface 4 is formed on an inner conical sur ⁇ face of the recessed region 3.
- a source unit 5 (see Fig.
- the source unit 5 is an LED source unit.
- the light emergent surface 2 comprises a concave central region 2a and a convex side region 2b, and the central region 2a and the side region 2b are in a smooth transition, wherein the central region 2a and the side region 2b are rotationally symmetrical in rela ⁇ tion to the optical axis X, respectively.
- Fig. 2 is an optical pathway diagram of light from the source unit 5 passing through the lens according to the present in ⁇ vention. As can be seen from the figure, light emerges through the light emergent surface 2 after refracted by the light incident surface 1. Accordingly, light from the source unit 5 is distributed more uniformly on an object to be illu- minated.
- Fig. 3 is an enlarged local view of the light incident sur ⁇ face 4 of the lens according to the present invention.
- a cross section of the annular groove 4a is a circular arc on a plane through which the op- tical axis X passes and the circular arc has a semi diameter of 0.1-0.5mm.
- a circular-arc profile with such size can bet- ter refract light for more uniform light distribution.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lenses (AREA)
Abstract
The present invention relates to a lens, for an illuminating device, comprising a bottom surface (1) and a light emergent surface (2) rising from the bottom surface (1), a recessed region (3) being formed in a center of the bottom surface (1), a light incident surface (4) being formed on a surface of the recessed region (3), a source unit (5) of the illuminating device being provided in the recessed region (3), and the recessed region (3) being rotationally symmetrical in relation to an optical axis (X) of the source unit (5), wherein the light incident surface (4) is provided with a plurality of annular grooves (4a), and light from the source unit (5) emerges through the light emergent surface (2) after refracted by the annular grooves (4a). In addition, the present invention further relates to an illuminating device with such lens.
Description
Description
A Lens and an Illuminating Device with the Lens Technical Field
The present invention relates to a lens for an illuminating device. In addition, the present invention further relates to an illuminating device with the lens.
Background Art With the development of the LED illuminating technology, the LED illuminating device is used more and more as light source in various environments. The luminance of a real light spot formed by light emitted from the LED chip is not uniform due to the manufacturing tolerance of the LED chip. Sometimes, the illuminance is not uniform and the color is not uniform, either. In order to solve the above problems and obtain an illuminating effect as good as possible, a lens is usually needed to be installed over the LED chip to adjust light from the LED chip. In the prior art, an emergent surface of the lens is structured, that is to say, many randomly distributed bumps or concaves are formed on the emergent surface for forming a diffusive surface, and the diffusive surface ad¬ justs the light from the LED chip. Another solution is to directly equip a diffusing screen over a top of the lens so as to adjust the light from the LED chip. However, it is hard to anticipate or simulate the light distribution when the light is adjusted by the lens and diffusing screen above. The light distribution of the light adjusted by the lens and diffusing screen above is random. Summary of the Invention
In order to solve the above problems, the present invention provides a lens for an illuminating device. Light emitted from the lens can realize an expected light distribution ef¬ fect on an object to be illuminated. In addition, the pre- sent invention further relates to an illuminating device with such lens .
The first object of the present invention is accomplished via a lens through the following solution. The lens comprises a bottom surface and a light emergent surface rising from the bottom surface, a recessed region is formed in a center of the bottom surface, a light incident surface is formed on a surface of the recessed region, a source unit of an illumi¬ nating device is provided in the recessed region that is ro- tationally symmetrical in relation to an optical axis of the source unit, wherein the light incident surface is provided with a plurality of annular grooves, and light from the source unit emerges through the light emergent surface after refracted by the annular grooves. In one solution of the present invention, the light from the source unit is firstly refracted by the light incident surface provided with a plu¬ rality of annular grooves. A specific configuration and ar¬ rangement of the annular grooves can be calculated according to a desired light distributiono
According to a preferred solution of the present invention, the recessed region is configured to be conic-like, the light incident surface is formed on an inner conical surface of the recessed region, the plurality of annular grooves are respec¬ tively formed on a plane of the recessed region perpendicular to the optical axis and arranged adjacent to each other from a bottom to a top of the recessed region. By such arrange¬ ment, each annular groove defines a plane parallel to the
plane perpendicular to the optical X. Light from the source unit can be adjusted by such annular grooves to expected an¬ gles so as to obtain an expected light distribution.
Preferably, the top of the recessed region is configured to be spherical surface. With the spherical surface, a light spot generated by the light from the source unit after emerg¬ ing from the lens will have almost consistent luminance both at edge and in center, but will not form in the center a region brighter than the edge, so that a uniform light distri- bution is obtained.
According to a preferred solution of the present invention, a cross section of the annular groove is a circular arc on a plane through which the optical axis passes. Such cross sec¬ tion in a circular arc shape is more favorable for a uniform light distribution.
Preferably, a semidiameter of the circular arc is 0.1-0.5mm. Circular arcs in this range can enable the light distribution to be as uniform as possible.
According to a preferred solution of the present invention, the light emergent surface comprises a concave central region and a convex side region, and the central region and the side region are in a smooth transition, wherein the central region and the side region are rotationally symmetrical in relation to the optical axis, respectively. Such light emergent sur- face can render an illumination pattern in a specific form while being capable of obtaining a uniform light distribu¬ tion.
The other object of the present invention is accomplished via an illuminating device with such type of lens. This illumi-
nating device can produce a uniform light distribution.
According to a preferred solution of the present invention, a light source of the illuminating device is an LED source unit. The LED source unit as a green energy source is fea- tured by a long service life and a high optical efficiency.
Brief Description of the Drawings
The accompanying drawings constitute a part of the present Description and are used to provide further understanding of the present invention. Such accompanying drawings illustrate the embodiments of the present invention and are used to de¬ scribe the principles of the present invention together with the Description. In the accompanying drawings the same components are represented by the same reference numbers. As shown in the drawings : Fig. 1 is a sectional view of a lens according to the present invention ;
Fig. 2 is an optical pathway diagram of light from a source unit passing through a lens according to the present invention; and Fig. 3 is an enlarged local view of a light incident surface of a lens according to the present invention.
Detailed Description of the Embodiments
Fig. 1 is a sectional view of a lens according to the present invention. As can be seen from the figure, the lens com- prises a bottom surface 1 and a light emergent surface 2 ris¬ ing from the bottom surface 1, a recessed region 3 is formed in a center of the bottom surface 1, the recessed region 3 is
configured to be conic-like as seen from the figure, and a light incident surface 4 is formed on an inner conical sur¬ face of the recessed region 3. A source unit 5 (see Fig. 2) of an illuminating device is provided in the recessed region 3 that is rotationally symmetrical in relation to an optical axis X, wherein the light incident surface 4 is provided with a plurality of annular grooves 4a, and light from the source unit 5 emerges through the light emergent surface 2 after re¬ fracted by the annular grooves 4a. In addition, the top 4b of the recessed region 3 is configured to be spherical sur¬ face. In one solution of the present invention, the source unit 5 is an LED source unit.
As further can be seen from Fig. 1, the light emergent surface 2 comprises a concave central region 2a and a convex side region 2b, and the central region 2a and the side region 2b are in a smooth transition, wherein the central region 2a and the side region 2b are rotationally symmetrical in rela¬ tion to the optical axis X, respectively.
Fig. 2 is an optical pathway diagram of light from the source unit 5 passing through the lens according to the present in¬ vention. As can be seen from the figure, light emerges through the light emergent surface 2 after refracted by the light incident surface 1. Accordingly, light from the source unit 5 is distributed more uniformly on an object to be illu- minated.
Fig. 3 is an enlarged local view of the light incident sur¬ face 4 of the lens according to the present invention. As can be seen from the figure, a cross section of the annular groove 4a is a circular arc on a plane through which the op- tical axis X passes and the circular arc has a semi diameter of 0.1-0.5mm. A circular-arc profile with such size can bet-
ter refract light for more uniform light distribution.
The above is merely preferred embodiments of the present in¬ vention but not to limit the present invention. For the per¬ son skilled in the art, the present invention may have vari- ous alterations and changes. Any alterations, equivalent sub¬ stitutions, improvements, within the spirit and principle of the present invention, should be covered in the protection scope of the present invention.
List of reference signs
1 bottom surface
2 light emergent surface 2a central region
2b side region
3 recessed region
4 light incident surface 4a annular groove
4b top of recessed region
5 source unit
X optical axis
Claims
1. A lens, for an illuminating device, comprising a bottom surface (1) and a light emergent surface (2) rising from the bottom surface (1), a recessed region (3) being formed in a center of the bottom surface (1), a light incident surface (4) being formed on a surface of the recessed region (3), a source unit (5) of the illuminating device being provided in the recessed region (3) , and the recessed region (3) being rotationally symmetrical in relation to an optical axis (X) of the source unit (5) , wherein the light incident surface (4) is provided with a plurality of annular grooves (4a), and light from the source unit (5) emerges through the light emergent surface (2) after refracted by the annular grooves
(4a) .
2. The lens according to Claim 1, wherein the recessed region (3) is configured to be conic-like, the light incident surface (4) is formed by an inner conical surface of the re¬ cessed region (3) , the plurality of annular grooves (4a) are respectively formed on a plane of the recessed region (3) perpendicular to the optical axis (X) and arranged adjacent to each other from a bottom to a top (4b) of the recessed re gion (3) .
3. The lens according to Claim 2, wherein the top (4b) the recessed region (3) is configured to be spherical sur¬ face .
4. The lens according to Claim 2, wherein a cross section of the annular groove (4a) is a circular arc on a plane ? n 1 1 1 ft ft ? R
WO 2013/034522 PCT/EP2012/067145
9 through which the optical axis (X) passes.
5. The lens according to Claim 4, wherein a semi diameter of the circular arc is 0.1-0.5mm.
6. The lens according to any one of Claims 1-5, wherein the light emergent surface (2) comprises a concave central region (2a) and a convex side region (2b) , and the central region (2a) and the side region (2b) are in a smooth transition, and wherein the central region (2a) and the side region (2b) are rotationally symmetrical in relation to the optical axis (X) , respectively .
7. An illuminating device comprising the lens according to any one of Claims 1-6.
8. The illuminating device according to Claim 7, wherein a light source of the illuminating device is an LED source unit .
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110268286.8A CN102997178A (en) | 2011-09-09 | 2011-09-09 | Lens and lighting device with lens |
| CN201110268286.8 | 2011-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013034522A1 true WO2013034522A1 (en) | 2013-03-14 |
Family
ID=46982523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2012/067145 Ceased WO2013034522A1 (en) | 2011-09-09 | 2012-09-03 | A lens and an illuminating device with the lens |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102997178A (en) |
| WO (1) | WO2013034522A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI613473B (en) * | 2015-10-09 | 2018-02-01 | Light guiding lens, light source module and display device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015212792A (en) * | 2014-05-07 | 2015-11-26 | 株式会社エンプラス | Luminous flux control member, light-emitting device, surface light source device, and display device |
| CN105627250A (en) * | 2014-11-05 | 2016-06-01 | 东莞雷笛克光学有限公司 | Optical component and lighting device having said optical component |
| CN105020677A (en) * | 2015-07-31 | 2015-11-04 | 华侨大学 | Wide-angle lens used for uniform near-field illumination |
| CN107991807B (en) * | 2017-12-07 | 2021-03-26 | 苏州奥浦迪克光电技术有限公司 | Backlight module lens and backlight module comprising same |
| CN110349513A (en) * | 2019-07-19 | 2019-10-18 | 北京神州科鹰技术有限公司 | A kind of LED display and production method eliminated moire fringes and improve light mixing effect |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6019493A (en) * | 1998-03-13 | 2000-02-01 | Kuo; Jeffrey | High efficiency light for use in a traffic signal light, using LED's |
| US20080297020A1 (en) * | 2005-09-30 | 2008-12-04 | Osram Opto Semiconductors Gmbh | Illuminiation Arrangement |
| US20100135028A1 (en) * | 2007-08-09 | 2010-06-03 | Sharp Kabushiki Kaisha | Light emitting device and lighting device having the same |
| US20100213480A1 (en) * | 2009-02-23 | 2010-08-26 | Samsung Led Co., Ltd. | Lens for light emitting diode package and light emitting diode package having the same |
| WO2011086104A1 (en) * | 2010-01-18 | 2011-07-21 | Osram Gesellschaft mit beschränkter Haftung | Lamp cover, lamp having the same and method for manufacturing the same |
-
2011
- 2011-09-09 CN CN201110268286.8A patent/CN102997178A/en active Pending
-
2012
- 2012-09-03 WO PCT/EP2012/067145 patent/WO2013034522A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6019493A (en) * | 1998-03-13 | 2000-02-01 | Kuo; Jeffrey | High efficiency light for use in a traffic signal light, using LED's |
| US20080297020A1 (en) * | 2005-09-30 | 2008-12-04 | Osram Opto Semiconductors Gmbh | Illuminiation Arrangement |
| US20100135028A1 (en) * | 2007-08-09 | 2010-06-03 | Sharp Kabushiki Kaisha | Light emitting device and lighting device having the same |
| US20100213480A1 (en) * | 2009-02-23 | 2010-08-26 | Samsung Led Co., Ltd. | Lens for light emitting diode package and light emitting diode package having the same |
| WO2011086104A1 (en) * | 2010-01-18 | 2011-07-21 | Osram Gesellschaft mit beschränkter Haftung | Lamp cover, lamp having the same and method for manufacturing the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI613473B (en) * | 2015-10-09 | 2018-02-01 | Light guiding lens, light source module and display device | |
| US10288256B2 (en) | 2015-10-09 | 2019-05-14 | Radiant Opto-Electronics (Suzhou) Co., Ltd. | Light guide lens, light emitting module and display apparatus including the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102997178A (en) | 2013-03-27 |
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