CN110260268B - Uniform light illumination module and application thereof - Google Patents

Uniform light illumination module and application thereof Download PDF

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Publication number
CN110260268B
CN110260268B CN201910552034.4A CN201910552034A CN110260268B CN 110260268 B CN110260268 B CN 110260268B CN 201910552034 A CN201910552034 A CN 201910552034A CN 110260268 B CN110260268 B CN 110260268B
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light
lighting module
shell
dodging
substrate
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CN110260268A (en
Inventor
杨华
李燕
杨宇铭
郑怀文
于飞
裴艳荣
李璟
伊晓燕
王军喜
李晋闽
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Institute of Semiconductors of CAS
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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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/05—Optical design plane
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • 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)
  • Led Device Packages (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A dodging lighting module and application thereof, the dodging lighting module includes: a housing having an inner wall with a diffusely reflective surface characteristic and an inner bottom surface with a specularly reflective surface characteristic; a light emitting element mounted inside the housing for providing a light source; a light homogenizing element installed inside the housing for homogenizing the light source; and the light emitting surface is arranged at the top of the shell and used for outputting the light source. The near-field light uniformizing module is simple in structure and low in manufacturing difficulty and cost, the total height of the light uniformizing module is lower than 10mm, and high-quality near-field light uniformizing is realized under the condition of smaller thickness and smaller volume.

Description

Uniform light illumination module and application thereof
Technical Field
The invention belongs to the field of semiconductor illumination and wearable photoelectron, and mainly relates to a uniform light illumination module and application thereof.
Background
The LED light source has wide application in the fields of illumination, display, decoration, medical treatment, environmental cleaning, sterilization, disinfection and the like. In these applications, it is desirable to have the light source form a uniform illumination distribution of regular shape and size on the target plane. However, the LED light source is Lambertian, and when used directly, has cos illumination on the target surface4Theta rapidly decreases and the central part of the illumination intensityThe illumination of the peripheral part is obviously reduced, and especially in a short distance, the irradiation range of a single chip is very small, so that uniform light spots are difficult to obtain.
The traditional dodging modes include dodging by a fly-eye lens, dodging by a dodging rod and dodging by a free-form surface lens. The fly-eye lens is formed by combining a series of small lenses, light beams parallel to an optical axis need to pass through the first lens and then are focused at the center of the second lens, the optical axes of the two rows of fly-eye lenses are parallel to each other, the collecting lens is arranged behind the second row of fly-eye lenses, and the receiving screen is arranged on a focal plane of the collecting lens to form a uniform illumination system. The light homogenizing rod is made of quartz glass generally, light is reflected for multiple times in the light homogenizing rod, a virtual light source image can be formed after each reflection, and a two-dimensional virtual light source matrix is formed after multiple reflections, so that the light is more uniform. The length of the light-homogenizing rod is increased, the uniformity is increased in oscillation, and therefore, the length needs to be set to be long in order to obtain a good light-homogenizing effect. The free-form surface lens can realize the redistribution to the light energy, has advantages such as small, efficient, the accurate controllable and design degree of freedom of light type, but the receiving face just can realize large tracts of land uniform lighting apart from the light source to have certain distance, and to ultraviolet ray LED, the quartz glass processing degree of difficulty that is suitable for is great moreover.
Disclosure of Invention
In view of the above, one of the main objectives of the present invention is to provide a uniform illumination module and applications thereof, so as to at least partially solve at least one of the above technical problems.
In order to achieve the above object, as one aspect of the present invention, there is provided a dodging lighting module including:
a housing having an inner wall with a diffusely reflective surface characteristic and an inner bottom surface with a specularly reflective surface characteristic;
a light emitting element mounted inside the housing for providing a light source;
a light homogenizing element installed inside the housing for homogenizing the light source;
and the light emitting surface is arranged at the top of the shell and used for outputting the light source.
As another aspect of the invention, the application of the dodging lighting module as described above in the fields of semiconductor lighting and wearable optoelectronics is also provided.
Based on the above technical solution, the uniform light illumination module and the application thereof of the present invention have at least one of the following advantages compared with the prior art:
(1) the invention has simple structure, low manufacturing difficulty and cost, and the total height of the light-homogenizing module is less than 10mm, and the light-homogenizing module has smaller thickness (6-10mm) and volume (4200-3) The near-field dodging with higher quality is realized.
(2) According to the short-distance dodging lighting module, light emitted by a single LED is uniformly distributed on a receiving screen at a position 1mm away from a light-emitting surface through the diffuse reflection effect of the frosting sheet and the inner wall of the shell and the reflection effect of the inner bottom surface of the shell, and the light is distributed in an area with the diameter of 30-50mm, so that the purpose of short-distance large-area dodging is achieved.
(3) The near-field light homogenizing device is simple in structure, simple to manufacture and low in cost, and can realize high-quality near-field light homogenizing.
Drawings
Fig. 1 is a schematic perspective view of a short-distance dodging lighting module in embodiment 1 of the present invention;
fig. 2 is a schematic cross-sectional structure view of a short-distance uniform illumination module according to embodiment 1 of the present invention;
fig. 3 is a diagram illustrating a distribution of simulated illuminance of the short-distance dodging lighting module in embodiment 1 of the present invention;
fig. 4 is a schematic cross-sectional view of a short-distance dodging lighting module in embodiment 2 of the present invention.
In the above figures, the reference numerals have the following meanings:
1-a housing; 2-a substrate; 3-a light emitting element; 4-a light homogenizing element; 5-reflective paper; 6-light emitting surface; 7-accept screen.
Detailed Description
In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments.
The invention discloses a dodging lighting module, which comprises:
a housing having an inner wall with a diffusely reflective surface characteristic and an inner bottom surface with a specularly reflective surface characteristic;
a light emitting element mounted inside the housing for providing a light source;
a light homogenizing element installed inside the housing for homogenizing the light source;
and the light emitting surface is arranged at the top of the shell and used for outputting the light source.
The light emitting surface is made of a light-transmitting material;
wherein, the dodging element is parallel to the bottom surface of the shell.
The light-homogenizing illumination module comprises a substrate used for providing electrical connection for a light-emitting element, the substrate is arranged at the bottom of the shell, and the light-emitting element is arranged on the substrate;
wherein the substrate is fixed at the bottom of the shell through a viscous material;
wherein, a metal reflecting layer is evaporated on the substrate or reflecting paper is arranged on the substrate.
The bottom of the shell is provided with an opening, and a substrate lead for electrically connecting the light-emitting element is arranged in the opening in a penetrating manner;
wherein the diameter of the open pore is 2-4 mm.
Wherein, the shell is made of any one of metal, plastic, glass or ceramic;
the diffuse reflection surface characteristic of the inner wall of the shell is realized by evaporating a metal diffuse reflection layer or sticking diffuse reflection paper;
wherein, the specular reflection surface characteristic of the inner bottom surface of the shell is realized by evaporating a metal reflection layer or sticking reflection paper.
Wherein the light emitting element comprises an LED light source;
wherein the LED light source comprises any one or combination of ultraviolet light, visible light or infrared light;
wherein the LED light source comprises an LED chip or an LED package;
wherein the LED chip has a size of 0.2 × 0.2 × 0.1-1 × 1 × 0.5mm3The LED chip structure is a forward mounting, inverted mounting or vertical structure;
wherein the light emitting element is connected with the substrate by gold wires or by soldering.
Wherein, the light homogenizing element consists of a plurality of frosting sheets;
wherein the diameter of the sanding sheet is 3-50mm, and the thickness of the sanding sheet is 0.4-2 mm;
wherein, the material adopted by the sanding sheet comprises any one of sapphire, quartz and glass;
wherein the sanding sheet is a single-sided sanding sheet or a double-sided sanding sheet;
the frosting sheet is a single-sided frosting sheet, the frosting direction of the frosting sheet inside the shell faces the light-emitting element, and the frosting direction of the frosting sheet outside the shell faces the light-emitting surface;
wherein, a layer of mirror reflection metal or reflective paper is evaporated on the abrasive sheet.
The height of the uniform light illumination module is less than or equal to 10 mm;
the thickness of the uniform light illumination module is 6-10 mm;
wherein, the volume of the light-homogenizing illumination module is 4200-20000mm3。
The uniformity of illumination of the uniform illumination module on the receiving screen at a position 1mm away from the light emitting surface in an area with the diameter of 30-50mm is larger than or equal to 0.7.
The invention also discloses application of the uniform light illumination module in the fields of semiconductor illumination and wearable photoelectron.
In one embodiment, the present invention adopts, for example, the following technical solutions:
a close-range light-homogenizing illumination module comprises a shell, a substrate, a light-emitting element and a light-homogenizing element. The inner wall of the shell has the characteristic of a diffuse reflection surface, and the inner bottom surface has the characteristic of a specular reflection surface; the substrate is fixed on the bottom surface of the shell and provides electrical connection for the light-emitting element; the light emitting element is an LED; emergent light of the LED light source is reflected for multiple times in the shell and the light uniformizing element and is emitted from the light emergent surface, so that light uniformization is realized. In a preferred embodiment, the present invention adopts the following technical solutions, for example:
a short-range dodging lighting module comprising: the light-emitting device comprises a shell, a substrate, a light-emitting element and a light homogenizing element;
the inner wall of the shell has diffuse reflection surface characteristics, and the inner bottom surface of the shell has specular reflection surface characteristics;
the substrate is arranged at the bottom of the shell, can be embedded in the shell in a hollow way, and has the supporting function of interconnecting and mounting a bare chip or a packaged chip and the function of conducting heat generated by the light-emitting element to air;
the light emitting element is mounted on the substrate;
the light homogenizing element is arranged in the shell and is parallel to the bottom surface of the shell.
Wherein, the bottom of shell is equipped with the trompil for making the base plate lead wire pass through.
The light-emitting element comprises different types of LED light sources such as ultraviolet light, visible light and infrared light.
Wherein the LED light source comprises an LED chip or an LED package.
The light homogenizing element is composed of a plurality of abrasive sheets, and the abrasive sheets can be made of materials such as sapphire, quartz, glass and the like.
The frosted sheet in the light uniformizing element can be single-side frosted or double-side frosted, if the frosted sheet is single-side frosted, the frosted direction of the frosted sheet in the shell faces to the light emitting element, and the frosted direction of the frosted sheet at the outermost part of the shell faces to the light emitting surface.
Wherein, the diameter range of the frosted sheet in the dodging element is 3-50 mm.
In another embodiment, the present invention adopts, for example, the following technical solutions:
a short-range dodging lighting module comprising: the light-emitting device comprises a shell, a substrate, a light-emitting element and a light homogenizing element; the inner wall of the shell has the characteristic of a diffuse reflection surface, the inner bottom surface of the shell has the characteristic of a mirror reflection surface, the shell can be made of metal or plastic, and the bottom of the shell is provided with a hole for allowing a lead on the substrate to pass through; the substrate is arranged at the bottom of the shell and has the supporting function of interconnecting and mounting a bare chip or a packaged chip and the function of conducting heat generated by the light-emitting element to the air; the light-emitting element is arranged on the substrate and comprises different types of LED light sources such as ultraviolet light, visible light and infrared light, and the light sources comprise LED chips or LED packaging chips; the light homogenizing element is arranged in the shell and is parallel to the bottom surface of the shell, the light homogenizing element is composed of a plurality of abrasive sheets, the abrasive sheets can be made of materials such as sapphire, quartz and glass, the abrasive sheets are single-side abrasive, the abrasive direction of the abrasive sheet in the shell faces the light-emitting element, and the abrasive direction of the abrasive sheet at the outermost part of the shell faces the light-emitting surface. The light emitted from the light source is diffused and reflected for many times by the sanding sheet and the inner wall of the shell, and the reflection effect of the inner bottom surface of the shell is achieved, so that the effect of light uniformization is achieved.
The technical solution of the present invention is clearly and completely described below with reference to the accompanying drawings in the specific embodiments. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention. 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.
Example 1
A short-distance dodging lighting module, which is described in detail with reference to fig. 1-2, according to an embodiment of the present application. The structure includes: a shell 1, a substrate 2, a light emitting element 3 and a light homogenizing element 4.
The diameter of the shell 1 is 30-50mm, the height is less than or equal to 10mm, the shell is made of metal, plastic, glass or ceramic materials, the inner wall of the shell has the characteristic of a diffuse reflection surface, and a metal diffuse reflection layer can be evaporated or diffuse reflection paper can be attached to the inner wall of the shell. The bottom in the casing has mirror reflection characteristic, and can be coated with metal reflection layer or reflection paper. An opening, approximately 3mm in diameter, was made in the bottom of the housing to allow the wires on the substrate to pass through.
The substrate 2 is mounted at the bottom center of the housing 1, and has a supporting function of interconnecting and mounting a bare chip or a packaged chip and a function of conducting heat generated from the light emitting element to the air. The base plate 2 is fixed at the bottom of the shell 1 through a sticky material, and a metal reflecting layer is evaporated or reflecting paper is pasted on the base plate 2.
The light-emitting element 3 is arranged in the center of the substrate 2, the light-emitting element 3 comprises different types of LED light sources such as ultraviolet light, visible light and infrared light, the light sources comprise LED chips or LED packaging chips, the size of each chip is millimeter, and the structure is a forward mounting structure, an inverted mounting structure or a vertical structure. The light emitting element 1 is connected to the substrate by gold wire or soldering, thereby realizing electrical connection to the substrate.
The light homogenizing element 4 is composed of a plurality of abrasive sheets, the positions of the abrasive sheets can be fixed by a metal support or a plastic support, the abrasive sheets can be made of materials such as sapphire, quartz, glass and the like, the direction of the abrasive sheets can face to the left or the right, the abrasive sheets can be single-side ground or double-side ground, if the abrasive sheets are single-side ground, the grinding direction of the abrasive sheets in the shell faces to the light-emitting element, and the grinding direction of the abrasive sheets at the outermost part of the shell faces to the light-emitting surface. The position of the outermost abrasive sheet is fixed, and the position of the abrasive sheet in the shell 1 can be changed between the chip and the outermost abrasive sheet. The number of the abrasive disk is more than 2 and the diameter is changed between 3mm and 50 mm. The light emitted from the light source is diffused and reflected for many times by the sanding sheet and the inner wall of the shell, and the reflection effect of the inner bottom surface of the shell is achieved, so that the effect of light uniformization is achieved. Fig. 3 is an optical simulation result of the short-distance dodging lighting module of the present embodiment, where the distance between the receiving screen and the light exit surface is 1mm, it can be seen that uniform illumination distribution is formed within 50mm of the diameter, the number of light sources is greatly reduced, and the cost is saved.
Example 2
As shown in fig. 4, embodiment 2 differs from embodiment 1 in that: in the design, part of light emitted from the light-emitting element 3 is subjected to diffuse reflection by the side wall of the shell, the other part of light is subjected to the mirror reflection in the center of the frosting sheet and the scattering of the residual frosting surface at the periphery, and no light directly irradiates the center of the light-emitting surface through the reflecting layer, so that the central illumination value is reduced. Wherein the diameter of the reflective layer may vary.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (18)

1. A dodging lighting module, comprising:
a housing having an inner wall with a diffusely reflective surface characteristic and an inner bottom surface with a specularly reflective surface characteristic;
a light emitting element, which is a single LED light source, installed inside the housing for providing a light source;
the light homogenizing element consists of a plurality of frosting sheets, is arranged in the shell and is parallel to the bottom surface of the shell, and is used for homogenizing the light source; wherein the diameter of the sanding sheet is 3-50mm, and the thickness of the sanding sheet is 0.4-2 mm;
the light emitting surface is arranged at the top of the shell and used for outputting a light source;
the height of the uniform light illumination module is less than or equal to 10 mm;
the volume of the light-homogenizing illumination module is 4200-3。
2. The dodging lighting module of claim 1,
the light-emitting surface is made of a light-transmitting material.
3. The dodging lighting module of claim 1,
the dodging lighting module comprises a substrate used for providing electrical connection for the light-emitting elements, the substrate is installed at the bottom of the shell, and the light-emitting elements are installed on the substrate.
4. The dodging lighting module of claim 3,
the substrate is fixed at the bottom of the shell through a viscous material;
a metal reflecting layer is evaporated on the substrate or reflecting paper is arranged on the substrate;
the light-emitting element is connected with the substrate through a gold wire or a welding mode.
5. The dodging lighting module of claim 1,
the bottom of the shell is provided with an opening, and a substrate lead used for electrically connecting the light-emitting element is arranged in the opening in a penetrating manner.
6. The dodging lighting module of claim 5,
the diameter of the open pore is 2-4 mm.
7. The dodging lighting module of claim 1,
the shell is made of any one of metal, plastic, glass or ceramic.
8. The dodging lighting module of claim 1,
the diffuse reflection surface characteristic of the inner wall of the shell is realized by evaporating a metal diffuse reflection layer or sticking diffuse reflection paper;
the specular reflection surface characteristic of the inner bottom surface of the shell is realized by evaporating a metal reflection layer or sticking reflection paper.
9. The dodging lighting module of claim 1,
the LED light source comprises any one or combination of ultraviolet light, visible light or infrared light.
10. The dodging lighting module of claim 1,
the LED light source comprises an LED chip or an LED packaging body.
11. The dodging lighting module of claim 10,
the LED chip has a size of 0.2 × 0.2 × 0.1-1 × 1 × 0.5mm3The LED chip structure is a forward mounting structure, an inverted mounting structure or a vertical structure.
12. The dodging lighting module of claim 1,
the material adopted by the abrasive sheet comprises any one of sapphire, quartz and glass.
13. The dodging lighting module of claim 1,
the grinding sheet is a single-side grinding sheet or a double-side grinding sheet.
14. The dodging lighting module of claim 13,
the frosting piece is a single-side frosting piece, the frosting direction of the frosting piece inside the shell faces the light-emitting element, and the frosting direction of the frosting piece outside the shell faces the light-emitting surface.
15. The dodging lighting module of claim 1,
the frosted sheet is evaporated with a layer of mirror reflection metal or provided with reflection paper.
16. The dodging lighting module of claim 1,
the thickness of the uniform light illumination module is 6-10 mm.
17. The dodging lighting module of claim 1,
the uniformity of the illuminance of the dodging lighting module on the receiving screen at a position 1mm away from the light emitting surface in an area with the diameter of 30-50mm is larger than or equal to 0.7.
18. Use of a dodging lighting module according to any one of claims 1 to 17 in the fields of semiconductor lighting and wearable optoelectronics.
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CN110680937B (en) * 2019-11-08 2023-05-02 中国科学院半导体研究所 Ultraviolet LED light homogenizing device and application thereof
CN111271657A (en) * 2020-03-06 2020-06-12 中国科学院半导体研究所 Regular N-edge intelligent LED light guide plate illumination device for aquaculture and manufacturing method
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