CN111288306A - LED illumination unit and optical system - Google Patents

LED illumination unit and optical system Download PDF

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Publication number
CN111288306A
CN111288306A CN201811496868.XA CN201811496868A CN111288306A CN 111288306 A CN111288306 A CN 111288306A CN 201811496868 A CN201811496868 A CN 201811496868A CN 111288306 A CN111288306 A CN 111288306A
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CN
China
Prior art keywords
free
optical lens
light source
led
form surface
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.)
Pending
Application number
CN201811496868.XA
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Chinese (zh)
Inventor
张尚婷
王媛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Aviation Electric Co Ltd
Original Assignee
Shanghai Aviation Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Aviation Electric Co Ltd filed Critical Shanghai Aviation Electric Co Ltd
Priority to CN201811496868.XA priority Critical patent/CN111288306A/en
Publication of CN111288306A publication Critical patent/CN111288306A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • 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
    • F21V5/02—Refractors for light sources of prismatic shape
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention discloses an LED lighting unit adopting a free-form surface optical lens, which is characterized by comprising an LED light source, a free-form surface optical lens and a plane lampshade. The invention has the beneficial effects that: the LED illumination system with warm color temperature and high brightness and specific emergent angles is realized, the light path design of LED illumination is realized by utilizing the characteristics of optical elements, the reliability of the light path design is improved, the light path design structure is simple, and the design space is saved.

Description

LED illumination unit and optical system
Technical Field
The invention relates to an LED illumination unit and an optical system.
Background
The LED is used as a new generation of direct current flash-free high-light-efficiency illumination light source, and has great potential in writing illumination application. The LED has the obvious advantages of energy conservation, high efficiency, environmental protection and long service life, and is one of the high and new technical fields with development prospects in the whole world. The LED is used as a light source with a small light emitting surface, is suitable for light distribution and secondary optical optimization design, can accurately control the emergent light direction, improves the light utilization rate and the illumination uniformity, and can effectively prevent glare, light pollution and the like.
For a typical LED lighting system, conventional lenses or reflector cups are typically used to meet the requirements. However, for the lighting system with asymmetric light distribution in XY directions, it is difficult for the conventional rotationally symmetric optical element to consider the shape and uniformity of the light spot and the optical efficiency of the system, and at this time, a free-form optical element with asymmetric light distribution needs to be adopted. Free-form surfaces generally refer to those surfaces that are not rotationally symmetric, irregular, or represented by mathematical equations. The design technology of free-form surface quadratic optics is a cross discipline, breaks through the concept of traditional optics, completely integrates optics and complex three-dimensional space mechanical curved surfaces, and can integrate a complex system into one element. In the illumination system, the free-form surface secondary optical element can not only improve the utilization of light energy, but also realize light distribution at a strict angle, and can redistribute all light rays of each degree emitted from the LED, thereby realizing high optical efficiency and good uniformity of light spots.
Disclosure of Invention
In order to solve the problem that the traditional rotationally symmetrical optical element in the prior art is difficult to take the shape and uniformity of light spots into account and the optical efficiency of the system into consideration, the invention provides a novel LED lighting unit and an optical system.
In order to achieve the purpose, the technical scheme of the invention is as follows: an LED illumination unit, comprising,
an LED light source printed board having an LED light source on a top surface thereof;
the free-form surface optical lens is arranged above the LED light source printed board, the bottom surface of the free-form surface optical lens is an incident surface of the free-form surface optical lens, the top surface of the free-form surface optical lens is an emergent surface of the free-form surface optical lens, and the bottom surface of the free-form surface optical lens corresponds to the LED light source; and the number of the first and second groups,
a flat lamp cover disposed above the free-form surface lens;
the LED light source is used for emitting light beams; the free-form surface optical lens is used for receiving the light beam from the LED light source, shaping the light beam and emitting the shaped light beam; the planar lamp shade is used for receiving the shaped light beam, further shaping the shaped light beam and emitting the further shaped light beam.
Preferably, the free-form optical lens has a refractive prism portion formed on a top surface thereof.
Preferably, in the LED lighting unit, the free-form optical lens has a microstructure portion formed on a top surface thereof.
Preferably, the top surface of the planar lampshade is provided with a refraction prism part.
Preferably, the LED light source is a warm color temperature light source.
As a preferable scheme of the LED lighting unit, the free-form optical lens is a TIR optical lens, and an inner curved surface thereof is an asymmetric free-form surface.
The invention also provides an optical system, and the array is provided with the LED lighting units.
Compared with the prior art, the invention has the beneficial effects that: the LED illumination system with warm color temperature and high brightness and specific emergent angle is realized, the simple and compact LED illumination light path design is realized by utilizing the characteristics of optical elements, the reliability of the light path design is improved, the light path design structure is simple, and the design space is saved.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions, and the advantageous effects brought by the technical features of the technical solutions described above, other technical problems solved by the present invention, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 4 of the present invention.
Fig. 5 is a layout diagram of the optical system design of the LED lighting unit of the present invention.
Fig. 6 is a schematic structural diagram of embodiment 5 of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and drawings. Here, the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1:
fig. 1 includes components such as an LED light source printed board 1, an LED light source 10, a free-form surface lens 2, and a flat lampshade 3. The specific light path is designed to be an LED light source 10, a light beam of the LED light source 10 is shaped through the free-form surface lens 2, and the light distribution of the shaped light beam in the XY axis direction meets specific requirements. The inner surface of the free-form surface lens 2 is asymmetrically distributed, and light beams passing through the free-form surface lens 2 can be further shaped so as to meet the requirement of specific light distribution.
The free-form surface lens 2 is a TIR optical lens, the inner curved surface of the free-form surface lens is an asymmetric free-form surface, and the specific design form can be determined according to actual needs. The design of the free-form lens 2 with respect to asymmetric free-form surfaces is well known to those skilled in the art.
Example 2:
fig. 2 includes components such as an LED light source printed board 1, an LED light source 10, a free-form surface lens 2, a plane lampshade 3, a prism 4, and the like. The specific light path is designed into an LED light source 10, a light beam of the LED light source 10 is shaped through a free-form surface lens 2, the shaped light beam is further shaped through a refraction prism 4, and the light distribution of the emergent light beam shaped through the optical element in the XY axis direction after passing through a plane lampshade 3 meets the specific requirement. The inner surface of the free-form surface lens 2 is in free-form surface asymmetric distribution, and the dioptric prisms 4 are arranged in a specific sequence and can further shape the light beams passing through the free-form surface lens 2 so as to meet the requirement of specific light distribution.
Example 3:
fig. 3 includes components such as an LED light source printed board 1, an LED light source 10, a free-form surface lens 2, and a flat lampshade 3. The specific light path is designed to be an LED light source 10, a light beam of the LED light source 10 is shaped through the free-form surface lens 2, and the light distribution of the shaped light beam in the XY axis direction meets specific requirements. The inner surfaces of the free-form surface lenses 2 are symmetrically distributed, and the upper surface microstructures 4 can further shape the light beams passing through the free-form surface lenses 2 so as to meet the requirement of specific light distribution. Fig. 2 is a sectional view of the light path design, further illustrating that the LED light source 10 finally reaches the surface of the flat lampshade 3 through the focusing and shaping of the free-form surface lens 2, and exits through the flat lampshade 3.
Example 4:
fig. 4 includes components such as an LED light source printed board 1, an LED light source 10, a free-form surface lens 2, and a flat lampshade 3. The specific light path is designed to be an LED light source 10, a light beam of the LED light source 10 is shaped through the free-form surface lens 2, and the light distribution of the shaped light beam in the XY axis direction meets specific requirements. The inner surface of the free-form surface lens 2 is asymmetrically distributed, and light beams passing through the free-form surface lens 2 can be further shaped so as to meet the requirement of specific light distribution. The free-form surface lens 3 is a TIR optical lens, the inner curved surface of the free-form surface lens is an asymmetric free-form surface, and the specific design form can be determined according to actual needs. The design of the free-form lens 3 with respect to asymmetric free-form surfaces is well known to those skilled in the art.
In embodiments 1 to 4, referring to fig. 5, the LED light sources 10 can be distributed in an array.
Example 5:
in fig. 6, a light source system, which may be a landing glide light, has a plurality of LED lighting units.
The foregoing merely represents embodiments of the present invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (7)

  1. An LED lighting unit, comprising,
    an LED light source printed board having an LED light source on a top surface thereof;
    the free-form surface optical lens is arranged above the LED light source printed board, the bottom surface of the free-form surface optical lens is an incident surface of the free-form surface optical lens, the top surface of the free-form surface optical lens is an emergent surface of the free-form surface optical lens, and the bottom surface of the free-form surface optical lens corresponds to the LED light source; and the number of the first and second groups,
    a flat lamp cover disposed above the free-form surface lens;
    the LED light source is used for emitting light beams; the free-form surface optical lens is used for receiving the light beam from the LED light source, shaping the light beam and emitting the shaped light beam; the planar lamp shade is used for receiving the shaped light beam, further shaping the shaped light beam and emitting the further shaped light beam.
  2. 2. The LED lighting unit of claim 1, wherein the free-form optical lens has a top surface formed with a refractive prism portion.
  3. 3. The LED lighting unit of claim 1, wherein the free-form optical lens has a top surface formed with microstructures.
  4. 4. The LED lighting unit of claim 1, wherein the top surface of the planar lamp housing is formed with a refractive prism portion.
  5. 5. The LED lighting unit of any of claims 1 to 4, wherein the LED light source is a warm color temperature light source.
  6. 6. The LED lighting unit of any one of claims 1 to 4, wherein the free-form optical lens is a TIR optical lens, and the inner surface thereof is an asymmetric free-form surface.
  7. 7. Optical system, characterized in that an array has an LED lighting unit according to any one of claims 1 to 6.
CN201811496868.XA 2018-12-07 2018-12-07 LED illumination unit and optical system Pending CN111288306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811496868.XA CN111288306A (en) 2018-12-07 2018-12-07 LED illumination unit and optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811496868.XA CN111288306A (en) 2018-12-07 2018-12-07 LED illumination unit and optical system

Publications (1)

Publication Number Publication Date
CN111288306A true CN111288306A (en) 2020-06-16

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CN201811496868.XA Pending CN111288306A (en) 2018-12-07 2018-12-07 LED illumination unit and optical system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115307076A (en) * 2022-07-15 2022-11-08 合肥工业大学 Anti-glare optical film for LED light source and design method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101532644A (en) * 2008-03-14 2009-09-16 鸿富锦精密工业（深圳）有限公司 Lamp
CN201526868U (en) * 2009-08-07 2010-07-14 广东昭信光电科技有限公司 Direct type backlight system
CN101986018A (en) * 2010-11-03 2011-03-16 吴峰 Wide light distribution angle lens unit and module of light-emitting diode street lamp
CN201925856U (en) * 2011-03-21 2011-08-10 惠州市纯英半导体照明科技有限公司 LED (light-emitting diode) lens
CN104075237A (en) * 2013-03-29 2014-10-01 海洋王（东莞）照明科技有限公司 Optical system and illuminating device with same
CN104676370A (en) * 2013-12-03 2015-06-03 深圳市邦贝尔电子有限公司 Light emitting diode (LED) lamp bead and LED light emitting module and LED street lamp with same
CN204853331U (en) * 2015-07-30 2015-12-09 厦门华联电子有限公司 Emitting diode lens, emitting diode light source module, emitting diode lamps and lanterns

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101532644A (en) * 2008-03-14 2009-09-16 鸿富锦精密工业（深圳）有限公司 Lamp
CN201526868U (en) * 2009-08-07 2010-07-14 广东昭信光电科技有限公司 Direct type backlight system
CN101986018A (en) * 2010-11-03 2011-03-16 吴峰 Wide light distribution angle lens unit and module of light-emitting diode street lamp
CN201925856U (en) * 2011-03-21 2011-08-10 惠州市纯英半导体照明科技有限公司 LED (light-emitting diode) lens
CN104075237A (en) * 2013-03-29 2014-10-01 海洋王（东莞）照明科技有限公司 Optical system and illuminating device with same
CN104676370A (en) * 2013-12-03 2015-06-03 深圳市邦贝尔电子有限公司 Light emitting diode (LED) lamp bead and LED light emitting module and LED street lamp with same
CN204853331U (en) * 2015-07-30 2015-12-09 厦门华联电子有限公司 Emitting diode lens, emitting diode light source module, emitting diode lamps and lanterns

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115307076A (en) * 2022-07-15 2022-11-08 合肥工业大学 Anti-glare optical film for LED light source and design method thereof

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Application publication date: 20200616