CN104676465B - Lens and LED lamp applying same - Google Patents
Lens and LED lamp applying same Download PDFInfo
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- CN104676465B CN104676465B CN201310628527.4A CN201310628527A CN104676465B CN 104676465 B CN104676465 B CN 104676465B CN 201310628527 A CN201310628527 A CN 201310628527A CN 104676465 B CN104676465 B CN 104676465B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The utility model provides a lens, it is floodlight lens, includes light incident surface, locating surface, first light emergent surface, light reflection face and second light emergent surface, the light incident surface the locating surface the light reflection face, second light emergent surface reaches first light emergent surface connects gradually, the locating surface is perpendicular with the optical axis direction, incides after refracting the partial light of inciding into the light incident surface incides first light emergent surface, or incides after refracting the partial light of inciding into this light incident surface the light reflection face, incides after this light reflection face transmission second light emergent surface, second light emergent surface with first light emergent surface refracts this light and then superposes each other and jets out. The invention also provides an LED lamp applying the lens.
Description
Technical Field
The invention relates to the field of lighting, in particular to a lens and an LED (light emitting diode) lamp using the lens.
Background
As a semiconductor capable of converting electric energy into light energy, LEDs are widely used in various lighting fixtures due to their advantages of high efficiency, low energy consumption, long service life, etc., and these lighting fixtures using LEDs as light sources have become indispensable lighting appliances in people's life and work, such as roadway lamps in the metallurgical, coal, petrochemical industries, street lamps in ports and docks, landscape street lamps, etc. Unlike conventional light sources such as incandescent lamps and metal halide lamps, which emit light in 360 degrees in all directions, lamps using LEDs as light sources have their chip packages to determine the diversity of light emission. Therefore, in specific applications, in order to meet the industrial specifications and use requirements, the LED lamp needs to be subjected to secondary optical design, so that the LED lamp meets the requirements of industrial lighting lamps. However, in the secondary optical design for LED lamp applications, due to the light emitting angle, most of the light emitted from the LED is directly emitted without being reflected, which inevitably causes a great loss of the light energy of the LED. Therefore, how to effectively utilize the light energy is a problem to be solved in LED lamp applications.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a lens having a large illumination surface and uniform illuminance transition.
The invention also provides an LED lamp applying the lens.
In order to solve the technical problem, the invention provides a lens which is a floodlight lens and comprises a light incident surface, a positioning surface, a first light emergent surface, a light reflecting surface and a second light emergent surface, wherein the light incident surface, the positioning surface, the light reflecting surface, the second light emergent surface and the first light emergent surface are sequentially connected, the positioning surface is vertical to the direction of an optical axis, part of light incident to the light incident surface is incident to the first light emergent surface after being refracted, or part of light incident to the light incident surface is incident to the light reflecting surface after being refracted, is incident to the second light emergent surface after being emitted by the light reflecting surface, and the second light emergent surface and the first light emergent surface are superposed and emitted after being refracted.
The lens is made by an optical-grade polymethyl methacrylate material injection molding process.
The positioning surface is an annular plane and is connected between the light incidence surface and the light reflection surface, and the positioning surface is used as an installation reference of the lens and is used for installing and fixing the lens.
After being refracted at the light incidence surface in the range of 0 degrees to +/-70 degrees, the light rays enter the first light ray emergence surface and are refracted again at the first light ray emergence surface to form light rays with required emergence angles and illumination intensity, and the light rays are emitted from an area with an included angle of 120 degrees.
The light rays in the range of +/-70 degrees to +/-90 degrees are refracted at the light ray incidence surface, then enter the light ray reflection surface, are totally reflected at the light ray reflection surface and then enter the second light ray emergence surface, and are refracted again at the second light ray emergence surface to form light rays with required emergence angles and illumination intensities, so that 120-degree light rays are emitted.
The first light emergent surface is a convex curved surface, the second light emergent surface is a circular inclined surface, the periphery of the first light emergent surface is connected with the inner circumference of the second light emergent surface, and the first light emergent surface and the second light emergent surface are mutually overlapped to form emergent light with a half light intensity angle of 120 degrees.
The light reflecting surface is a circular inclined surface and is connected between the positioning surface and the second light emergent surface.
The light incidence surface is an inner concave surface as a whole, and the inner circumferences of the rest of the positioning surfaces are connected.
The LED lamp comprises a light source and the lens, wherein part of light rays emitted by the light source and entering the light ray incidence surface are refracted and then enter the first light ray emergence surface, or part of light rays entering the light ray incidence surface are refracted and then enter the light ray reflection surface, the light rays are emitted by the light ray reflection surface and then enter the second light ray emergence surface, and the second light ray emergence surface and the first light ray emergence surface are mutually overlapped and emitted after the light rays are refracted.
The lens is characterized in that one end of the lens is provided with an accommodating cavity, the accommodating cavity is enclosed by the light incidence surface, the light emitting part of the light source is accommodated in the accommodating cavity, and the light emitted by the light emitting part irradiates the light incidence surface.
In the LED lamp provided by the present invention, the light emitted from the light source is refracted by the light incident surface and then directly enters the first light emitting surface, or is refracted by the light incident surface and then enters the light reflecting surface, and then enters the second light emitting surface after being reflected by the light reflecting surface, and is refracted again at the second light emitting surface to form a light emitting surface with a large irradiation surface and uniform illuminance transition. Therefore, the central light intensity and the irradiation area of the LED lamp can meet the illumination requirement at the same time.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic perspective view of an LED lamp provided in an embodiment of the present invention.
Fig. 2 is a schematic perspective view of another viewing angle of the LED lamp provided in the embodiment of the present invention.
Fig. 3 is a front view of an LED lamp provided in an embodiment of the present invention.
Fig. 4 is a schematic light path diagram of an LED lamp provided in an embodiment of the present invention.
Fig. 5 is a light distribution graph (in polar form) of an LED lamp provided by an embodiment of the present invention, wherein the central light intensity is about 16 candela.
Fig. 6 is a luminance graph of an LED lamp according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the invention provides an LED (light emitting diode) lamp, which can be an illumination lamp in metallurgy, coal, petrochemical industry, tunnel lamp, port and dock street lamp, landscape street lamp, or the like. The LED lamp comprises a light source 20 and a lens 40 which corresponds to the light source 20, wherein the lens 40 forms emergent light with a large irradiation surface and uniform illumination transition for the LED lamp, and the requirement of the LED lamp on the light design is met. The light source 20 can emit light with corresponding color and brightness according to illumination requirements and irradiate the lens 40, and the lens 40 optically processes (such as reflection and refraction) the light from the light source 20 so as to form emergent light with a required half-light-intensity angle on an irradiated surface.
In the embodiment of the invention, the LED lamp further includes a lamp housing, a heat dissipation plate, a driving assembly, a lampshade, and the like, where the lamp housing is used as a main body of the LED lamp and is used to accommodate the light source 20, the lens 40, the heat dissipation plate, the driving assembly, and the like, and the lampshade is detachably covered on the lamp housing, so as to encapsulate the light source 20, the lens 40, the heat dissipation plate, the driving assembly, and the like in the lamp housing.
Referring to fig. 3 and 4, the light source 20 may be an LED chip, which is mounted on the heat sink (e.g., an aluminum substrate) by surface mounting, soldering, etc., and the heat sink can conduct and dissipate heat generated by the light source 20 during operation. The light source 20 includes a light emitting portion 22, and the light emitting portion 22 is located in the lens 40, and emits light that is irradiated onto the lens 40 and reflected or refracted by a surface of the lens 40.
In the embodiment of the present invention, the lens 40 is generally disc-shaped, and may be made of polymethyl methacrylate (PMMA) material, and specifically, the lens 40 may be made of optical grade PMMA material by an injection molding process. The lens 40 may be a dish-shaped flood lens, and its surface includes a light incident surface 42, a positioning surface 43, a light reflecting surface 44, a first light emitting surface 45 and a second light emitting surface 46. The light incident surface 42, the positioning surface 43, the light reflecting surface 44, the second light emitting surface 46 and the first light emitting surface 45 are connected in sequence, thereby constituting an outer surface of the lens 40.
In the embodiment of the present invention, the lens 40 has a receiving cavity 48, the receiving cavity 48 is disposed at the light incident end of the lens 40, the light source 20 is aligned with the receiving cavity 48, and the light emitting portion 22 of the light source 20 is received in the receiving cavity 48. The light incident surface 42 encloses the receiving cavity 48, and the light emitted from the light emitting portion 22 in the receiving cavity 48 is irradiated onto the light incident surface 42.
In the embodiment of the present invention, the light incident surface 42 is substantially a concave surface, and after the light emitted from the light source 20 is refracted at the light incident surface 42, a part of the light directly enters the first light exiting surface 45, and is refracted again at the first light exiting surface 45 to form a light exit with a desired exit angle and illumination (such as the light ray ① shown in fig. 4).
In addition, after the light emitted from the light source 20 is refracted at the light incident surface 42, a part of the light enters the light reflecting surface 44, is totally reflected at the light reflecting surface 44 and enters the second light exiting surface 46, and is refracted again at the second light exiting surface 46 to form a light (such as the light ② shown in fig. 4) with a desired exit angle and illumination intensity.
The positioning surface 43 serves as a mounting reference for the lens 40, and is used for mounting and fixing the lens 40. In the embodiment of the present invention, the positioning surface 43 is an annular plane and is connected between the light incident surface 42 and the second light emitting surface 46, that is, the light incident surface 42 is connected to the inner circumferential edge of the positioning surface 43, and the second light emitting surface 46 is connected to the outer circumferential edge of the positioning surface 43. The positioning surface 43 is perpendicular to the optical axis of the light source 20, and the light emitted from the light source 20 does not pass through or irradiate the positioning surface 43.
The second light exit surface 46 is connected between the light reflection surface 44 and the first light exit surface 45. In the embodiment of the present invention, the light reflection surface 44 is a circular slope that reflects the light refracted by the light incidence surface 42 and emits the reflected light to the second light exit surface 46.
In the embodiment of the present invention, the first light exiting surface 45 is an outward convex arc surface or a spherical surface, which is connected to the inner circumference of the second light exiting surface 46 and can reflect the light emitted from the light incident surface 42. specifically, the light in the range of 0 ° -70 ° emitted from the light source 20 is refracted at the light incident surface 42 and then directly enters the first light exiting surface 45, and is refracted again at the first light exiting surface 45 to form the light with the required exit angle and illumination, and then exits from the region (shown as light rays ① and ② in fig. 4) with the included angle of 120 °.
In the embodiment of the present invention, the second light exiting surface 46 is a circular inclined surface, the outer circumference of which is connected to the light reflecting surface 44, and the light emitted from the light incident surface 42 can be refracted, specifically, the light in the area of ± 70 ° to ± 90 ° emitted from the light source 20 is refracted at the light incident surface 42, and then a part of the light enters the light reflecting surface 44, and then is totally reflected and then enters the second light exiting surface 46, and is refracted again at the second light exiting surface 46 to form a light exiting with an included angle of 120 ° (such as the light ③ shown in fig. 4).
As an embodiment of the present invention, one of the designs of the lens 40 may be: the lens 40 is a dish-shaped floodlight lens which is manufactured by an injection molding process of an optical-grade PMMA material; the light incident surface 42, the positioning surface 43, the first light emitting surface 45, the light reflecting surface 44 and the second light emitting surface 46 are sequentially connected to form an outer surface of the lens 40; the light incident surface 42 is generally an inner concave surface, and the positioning surface 43 is an annular plane, connected between the light incident surface 42 and the light reflecting surface 44, and perpendicular to the optical axis of the light source 20; the light reflecting surface 44 is an inclined surface; the first light emitting surface 45 is an outward convex arc surface or a spherical surface, the second light emitting surface 46 is an inclined circular ring surface, the inner circumference of the inclined circular ring surface is connected with the periphery of the first light emitting surface 45, and the outer circumference of the inclined circular ring surface is connected with the light reflecting surface 44. It should be understood that the above design is only one specific embodiment of the lens 40, the present application is not limited to the above design, the size of the lens 40 is designed according to the structural size of the LED lamp, and the design parameters satisfying such optical performance are within the protection scope of the present application, and will not be described herein again.
Referring to fig. 1 to 6, in use, the light source 20 is mounted on the heat dissipating plate (e.g., aluminum substrate) by surface mounting, welding, etc., after being powered on, the light source 20 emits light with corresponding color and brightness according to illumination requirements, the light emitting portion 22 of the light source 20 is accommodated in the accommodating cavity 48 and aligned with the light incident surface 42, the light rays emitted by the light source 20 in the range of 0 ° -70 ° are refracted at the light incident surface 42 and directly incident on the first light emitting surface 45, and are refracted again at the first light emitting surface 45 to form light with required exit angle and illumination, and are emitted from a region with an included angle of 120 ° (i.e., light rays ① and ② shown in fig. 4), the light rays emitted by the light source 20 in the region of ± 70 ° -90 ° are refracted at the light incident surface 42, a portion of the light rays are emitted into the light reflecting surface 44, and then are incident on the second light emitting surface 46 after being totally reflected, and are reflected by the light reflecting surface 46, and are reflected by the light reflecting surface 44, and the light emitting lens system, so that the light spot of the light emitted from the light source 20 is formed by the light source 46, and the light emitting lens system can be illuminated uniformly, and the light emitting surface 120 ° and the light emitting lens can be illuminated by the LED lighting system with the light distribution of the light emitting surface 636, so that the light distribution is large illumination requirement that the lighting system can be provided, and the lighting system can be illuminated uniformly.
In summary, in the LED lamp provided by the present invention, the light emitted from the light source 20 is refracted by the light incident surface 42 and then directly enters the first light emitting surface 45, or is refracted by the light incident surface 42 and then enters the light reflecting surface 44, and is reflected by the light reflecting surface 44 and then enters the second light emitting surface 46, and is refracted again at the second light emitting surface 46 to form a light emitting with a large illumination surface and uniform illuminance transition. Therefore, the central light intensity and the irradiation area of the LED lamp can meet the illumination requirement at the same time.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. The lens is characterized in that the lens is a floodlight lens and comprises a light incident surface, a positioning surface, a first light emergent surface, a light reflecting surface and a second light emergent surface, wherein the light incident surface, the positioning surface, the light reflecting surface, the second light emergent surface and the first light emergent surface are sequentially connected, the first light emergent surface is an outer convex arc-shaped surface or a spherical curved surface, the second light emergent surface is a circular inclined surface, the periphery of the first light emergent surface is circumferentially connected with the inner periphery of the second light emergent surface, the first light emergent surface and the second light emergent surface are mutually overlapped to form emergent light with a half-intensity angle of 120 degrees, the positioning surface is vertical to the direction of an optical axis, the incident light incident surface is refracted at the light incident surface within a range of 0 degrees to +/-70 degrees, and then incident to the first light emergent surface and form required emergent light after the incident light is refracted at the first light emergent surface again The light rays with the angle and the illumination intensity or the light rays which are incident to the light ray incidence surface and are within the range of +/-70 degrees to +/-90 degrees are refracted on the light ray incidence surface, then are incident to the light ray reflection surface, are incident to the second light ray outgoing surface after being totally reflected on the light ray reflection surface, are refracted on the second light ray outgoing surface again to form the light rays with the required outgoing angle and the illumination intensity, and are mutually superposed after being refracted on the second light ray outgoing surface and the first light ray outgoing surface and then are emitted from an area with the included angle of 120 degrees.
2. The lens of claim 1, wherein the lens is made by an injection molding process of an optical grade polymethylmethacrylate material.
3. The lens of claim 1, wherein the positioning surface is an annular flat surface connected between the light incident surface and the light reflecting surface, and the positioning surface is used as a mounting reference of the lens for mounting and fixing the lens.
4. The lens of claim 1 wherein the light reflecting surface is an annular bevel that is connected between the positioning surface and the second light exit surface.
5. The lens of claim 1 wherein the light entry surface is generally a concave surface that is continuous with the inner circumference of the positioning surface.
6. An LED lamp, comprising a light source, characterized in that the lamp further comprises the lens of any one of claims 1 to 5, wherein a part of light emitted by the light source and incident on the light incident surface is refracted and then incident on the first light emergent surface, or a part of light incident on the light incident surface is refracted and then incident on the light reflecting surface, and then incident on the second light emergent surface after being reflected by the light reflecting surface, and the second light emergent surface and the first light emergent surface are superposed and emitted after refracting the light.
7. The LED lamp as claimed in claim 6, wherein the lens has a receiving cavity defined by the light incident surface at one end, and the light source has a light emitting portion received in the receiving cavity and emitting light to the light incident surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628527.4A CN104676465B (en) | 2013-11-29 | 2013-11-29 | Lens and LED lamp applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628527.4A CN104676465B (en) | 2013-11-29 | 2013-11-29 | Lens and LED lamp applying same |
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| Publication Number | Publication Date |
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| CN104676465A CN104676465A (en) | 2015-06-03 |
| CN104676465B true CN104676465B (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310628527.4A Active CN104676465B (en) | 2013-11-29 | 2013-11-29 | Lens and LED lamp applying same |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109427948B (en) * | 2017-08-24 | 2020-07-24 | 嘉兴敏德汽车零部件有限公司 | High-voltage chip light emitting unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900291A (en) * | 2010-07-22 | 2010-12-01 | 李瑞坤 | LED street lamp lens |
| CN102080805A (en) * | 2009-12-01 | 2011-06-01 | 深圳市斯派克光电科技有限公司 | LED array street lamp lens module and manufacturing method thereof |
| CN102162625A (en) * | 2011-01-30 | 2011-08-24 | 深圳市众明半导体照明有限公司 | Large-angle LED and LED lamp |
| CN202188357U (en) * | 2011-08-17 | 2012-04-11 | 惠州雷士光电科技有限公司 | Led lighting module |
| CN202884798U (en) * | 2012-11-03 | 2013-04-17 | 甘柏枝 | Lens used for light-emitting diode (LED) lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2010001604A1 (en) * | 2008-07-01 | 2011-12-15 | ハリソン東芝ライティング株式会社 | Lighting device |
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2013
- 2013-11-29 CN CN201310628527.4A patent/CN104676465B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080805A (en) * | 2009-12-01 | 2011-06-01 | 深圳市斯派克光电科技有限公司 | LED array street lamp lens module and manufacturing method thereof |
| CN101900291A (en) * | 2010-07-22 | 2010-12-01 | 李瑞坤 | LED street lamp lens |
| CN102162625A (en) * | 2011-01-30 | 2011-08-24 | 深圳市众明半导体照明有限公司 | Large-angle LED and LED lamp |
| CN202188357U (en) * | 2011-08-17 | 2012-04-11 | 惠州雷士光电科技有限公司 | Led lighting module |
| CN202884798U (en) * | 2012-11-03 | 2013-04-17 | 甘柏枝 | Lens used for light-emitting diode (LED) lamp |
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| Publication number | Publication date |
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| CN104676465A (en) | 2015-06-03 |
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