CN112879867A - Light projector capable of increasing light reflection area - Google Patents

Light projector capable of increasing light reflection area Download PDF

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Publication number
CN112879867A
CN112879867A CN201911201495.3A CN201911201495A CN112879867A CN 112879867 A CN112879867 A CN 112879867A CN 201911201495 A CN201911201495 A CN 201911201495A CN 112879867 A CN112879867 A CN 112879867A
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CN
China
Prior art keywords
light
cover body
releasing
hole
cover
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Pending
Application number
CN201911201495.3A
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Chinese (zh)
Inventor
江庆峯
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Individual
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Individual
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Priority to CN201911201495.3A priority Critical patent/CN112879867A/en
Publication of CN112879867A publication Critical patent/CN112879867A/en
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • 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
    • 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
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H10K50/822—Cathodes characterised by their shape
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • 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)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Geometry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Inorganic Chemistry (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention provides a light projector capable of increasing light reflection area, which comprises a light guide cover and a light transmission solid cover body, wherein the surface of the cover body comprises a light incident surface, a light releasing surface and at least one reflection surface, a shielding layer is covered on the outer surface of the at least one reflection surface, a plurality of light emitting elements are distributed on the light incident surface, the at least one reflection surface comprises a characteristic reflection surface with light condensation curvature, a plurality of reflection parts which are convex towards the inner arc of the cover body are formed on the characteristic reflection surface, the plurality of light emitting elements provide light which is projected into the cover body from the light incident surface, and the light in the cover body is reflected by the characteristic reflection surface and the plurality of reflection parts and is projected outwards through the light releasing surface. Therefore, the problem that the light projected by the traditional light projector is difficult to be uniformly distributed is solved.

Description

Light projector capable of increasing light reflection area
Technical Field
The present invention relates to a light projector structure, and more particularly to a light projector capable of increasing the light reflection area.
Background
The light projector is an object for reflecting light emitted by light emitting elements such as a bulb, a lamp tube, a Light Emitting Diode (LED) and the like and then emitting the light, and the light projector can limit a light source to project into a specific area so as to increase the illumination of the specific area.
In order to increase the illumination of the light projected by the conventional light projector, two methods are generally adopted as shown in fig. 1 and 2. Fig. 1 shows that the number of light emitting elements 2 is increased to increase the illumination when the light projector projects to a specific area; fig. 2 shows that the light emitting device 2 is disposed at one end of a light guide cover 1 having an arc-shaped reflecting surface, and the illumination intensity projected to a specific area by the light projector is increased by the light condensing effect of the arc-shaped reflecting surface.
However, in the method of using a large number of light emitting devices 2 to increase the illumination intensity in fig. 1, besides increasing the construction cost and the occupied space of the light projector, a large amount of electric energy is consumed during the use; in addition, although only a small number of light emitting elements 2 need to be used in the manner of increasing the illumination intensity by the arc-shaped reflecting surface in fig. 2, most of the light projected by the light projector is concentrated at the central position of the specific region due to the arc-shaped structure of the arc-shaped reflecting surface, so that the light is not uniformly distributed in the specific region, and thus the improvement is needed.
Disclosure of Invention
In view of the above, the present invention aims to solve the problem of non-uniform distribution of light projected by the conventional light projector, and further provides a light projector capable of increasing the light reflection area.
In a preferred embodiment, the technical means of the present invention comprises: the light guide cover is composed of a light-transmitting solid cover body, the surface of the cover body comprises a light incident surface, a light release surface and at least one reflecting surface, and the outer surface of the at least one reflecting surface is covered with a shielding layer; a plurality of light emitting elements arranged on the light incident surface; the light emitting elements provide light rays to be projected into the cover body from the light incident surface, and the light rays in the cover body are reflected by the characteristic reflecting surface and the reflecting parts and are projected outwards through the light releasing surface.
In further implementation, the cover body is a conical body with at least one taper, the light-gathering curvature of the characteristic reflecting surface is formed by the conical profile of the cover body, a hollow image-taking channel is formed in the center of the cover body, and an image-taking hole and a light-releasing hole are respectively formed at two ends of the image-taking channel. The light incident surface is annularly located at the periphery of the image capturing hole, the characteristic reflecting surface and the light releasing surface are separated by the thickness of the cover body, so that the characteristic reflecting surface is conical and serves as the outer surface of the cover body, and the light releasing surface is conical and is located in the image capturing channel and serves as the inner surface of the cover body. The aperture of the image taking hole is smaller than that of the light releasing hole, and the characteristic reflecting surface and the light releasing surface are respectively expanded and inclined from the image taking hole to the light releasing hole. The plurality of light-emitting elements are annularly arranged in an annular shell at intervals, and the annular shell is arranged on the light incident surface.
In a further embodiment, the conical cover comprises a plurality of covers with different tapers connected in series. Wherein the cover parts with different tapers comprise a first cover part and a second cover part, the image capture hole is located on the first cover part, the light release hole is located on the second cover part, the image capture channel has a central line, and the inclination angle theta of the first cover part relative to the central line1Is relatively smaller or larger than the inclination angle theta of the second cover part relative to the central line2。
In further implementation, the cover body is in an arc cup shape, the light-gathering curvature of the characteristic reflecting surface is formed by the arc cup profile of the cover body, a hollow image capturing channel is formed in the center of the cover body, and an image capturing hole and a light releasing hole are formed at two ends of the image capturing channel respectively. The light incident surface is annularly located at the periphery of the light releasing hole, the characteristic reflecting surface and the light releasing surface pass through the interval of the thickness of the cover body, so that the characteristic reflecting surface is in an arc convex cup shape and is used as the outer surface of the cover body, and the light releasing surface is in an arc concave cup shape and is located in the image capturing channel and is used as the inner surface of the cover body. The aperture of the image taking hole is smaller than that of the light releasing hole, and the characteristic reflecting surface and the light releasing surface are respectively expanded towards the light releasing hole from the image taking hole in an arc shape. The plurality of light-emitting elements are annularly arranged in an annular shell at intervals, and the annular shell is arranged on the light incident surface. The plurality of light-emitting elements are annularly arranged in an annular shell at intervals, and the annular shell is arranged on the light incident surface.
In a further embodiment, the shroud has a shape of a segment of an arc, and the concentration curvature of the characteristic reflecting surface is defined by the segment profile of the shroud. The light incident surface is located between the light releasing surface and the characteristic reflecting surface in a planar manner, and the characteristic reflecting surface and the light releasing surface are separated by the thickness of the cover body, so that the characteristic reflecting surface and the light releasing surface are in the same arc-shaped form.
According to the technology, the invention can produce the technical effects that: the reflecting area of the light source is increased by the reflecting part, so that light rays provided by the light emitting element can be projected outwards in a uniformly distributed mode, and the illumination of the light projector is further improved.
The details of the above-described technical means and the specific implementation of the effective performance thereof are described with reference to the following embodiments and drawings.
Drawings
Fig. 1 is a schematic diagram of a first example of a conventional projector.
Fig. 2 is a schematic diagram of a second example of a conventional projector.
Fig. 3 is a cross-sectional view of a first embodiment of the light projector of the present invention.
FIG. 3a is an enlarged partial cross-sectional view of the light guide cover of FIG. 3.
Fig. 4 is a schematic view of the light projected to the reflection portion.
Fig. 5 is a cross-sectional view of a second embodiment of the light projector of the present invention.
Fig. 6 is a cross-sectional view of a third embodiment of the light projector of the present invention.
Fig. 7 is a cross-sectional view of a fourth embodiment of the light projector of the present invention.
Description of reference numerals: 1. 10-a light guide cover; 10a, 10b, 10c, 10 d-cover; 101-a first cover; 102-a second cover; 11a, 11c, 11 d-the light incident surface; 12a, 12c, 12 d-light release surfaces; 13-a reflective surface; 13a, 13c, 13 d-characteristic reflecting surfaces; 14-a reflective portion; 15-image capture channel; 151-imaging aperture; 152-a light release hole; 2. 20-a light emitting element; 21-shell; 211-a through hole; 30-a shielding layer; c-center line; theta1、θ2-an angle of inclination.
Detailed Description
First, referring to fig. 3 and fig. 3a together, a first embodiment of the light projector capable of increasing the light reflection area according to the present invention is provided, which illustrates that the light projector capable of increasing the light reflection area includes a light guide cover 10 and a plurality of light emitting elements 20, wherein:
the light guide cover 10 is composed of a light-transmitting solid cover body 10a, and the material of the cover body 10a is glass or acrylic or other light-transmitting materials. The surface of the cover 10a includes an incident surface 11a, a light-releasing surface 12a and at least one reflecting surface 13, wherein light enters the cover 10a from the incident surface 11a, and is reflected by the reflecting surface 13 to be projected to the outside through the light-releasing surface 12 a. Furthermore, a shielding layer 30 made of metal paint is coated on the outer surface of the reflective surface 13, so that the reflective surface 13 can reflect light.
The reflecting surface 13 includes a characteristic reflecting surface 13a having a light-condensing curvature, and the light-condensing curvature means that when the light is projected to the characteristic reflecting surface 13a, the light is reflected to a specific area to form a light-condensing phenomenon. The characteristic reflection surface 13a is formed with a plurality of reflection parts 14 that are convex inward toward the cover 10a, and light enters the cover 10a from the light incident surface 11a, is reflected by the characteristic reflection surface 13a and the reflection parts 14, and is projected outward through the light emitting surface 12 a. In addition, the reflection part 14 is implemented by forming a plurality of spherical particle-shaped grooves on the characteristic reflection surface 13a of the cover 10a, and forming the reflection part 14 on the groove walls of the spherical particle-shaped grooves by coating the shielding layer 30 on the outer surface of the characteristic reflection surface 13 a.
Referring to fig. 3 again, the mask body 10a is illustrated as a conical body with at least one taper, and the light-gathering curvature of the characteristic reflection surface 13a is formed by the conical contour of the mask body 10 a. The central portion of the housing 10a forms a hollow image capturing channel 15, both ends of the image capturing channel 15 extend to the surface of the housing 10a to form an image capturing hole 151 and a light releasing hole 152, the aperture of the image capturing hole 151 is smaller than that of the light releasing hole 152, and the characteristic reflecting surface 13a and the light releasing surface 12a are respectively inclined from the image capturing hole 151 to the light releasing hole 152. The light incident surface 11a is located at the periphery of the image capturing hole 151 in a ring shape. Further, the characteristic reflection surface 13a and the light release surface 12a are separated by the thickness of the cover 10a, such that the characteristic reflection surface 13a is conical as the outer surface of the cover 10a, and the light release surface 12a is conical and is located in the image capturing passage 15 as the inner surface of the cover 10 a. In addition, the image capturing hole 151 is used for assembling an image capturing unit (not shown).
The light emitting elements 20 are arranged on the light incident surface 11a, and the light emitting elements 20 are Light Emitting Diodes (LEDs) in implementation. Furthermore, the light emitting elements 20 are annularly arranged in an annular housing 21 at intervals, and the annular housing 21 is disposed on the light incident surface 11a, so that the light emitted from the light emitting elements 20 can enter the cover 10a through the light incident surface 11 a. Further, the annular housing 21 has a through hole 211, and the image capturing unit is assembled to the image capturing hole 151 through the through hole 211.
Referring to fig. 4, it is illustrated that when a plurality of light beams are respectively projected to different positions on the reflection portion 14 in the same direction, due to the arc-convex shape of the reflection portion 14, the incident angles of the light beams when contacting the reflection portion 14 are different, and the reflection angles of the light beams are different according to the principle that the incident angles are equal to the reflection angles, so that the projection directions of the light beams are increased by the multi-angle light beams reflected by the reflection portion 14, and the light beams are not concentrated in a certain direction and position.
Referring to fig. 5, a second embodiment of the light projector according to the present invention is provided, which illustrates that the conical cover 10b is formed by connecting a plurality of covers with different tapers in series. More specifically, the cover portions include a first cover portion 101 and a second cover portion 102, the image capturing hole 151 is located on the first cover portion 101, the light releasing hole 152 is located on the second cover portion 102, and an inclination angle θ is formed between the first cover portion 101 and a center line C of the image capturing channel 151The second cover portion 102 and the central line C of the image capturing channel 15 have an inclined angle θ therebetween2The angle of inclination theta1Is smaller than the angle of inclination theta2(i.e. theta)1＜θ2). Thus, the reflection area of the cover 10b for reflecting light can be increased, and the light projection area with different angles can be increased. In addition, the present invention can also be implemented such that the inclination angle θ1Is greater than the angle of inclination theta2(i.e. theta)1＜θ2) The aspect (not shown) of (A) is a simple transformation of the invention, which is summarized and clarified by the present invention.
Referring to fig. 6, a third embodiment of the light projector according to the present invention is provided, which illustrates that the housing 10c is an arc cup-shaped body, and the light-gathering curvature of the characteristic reflecting surface 13c is formed by the arc cup contour of the housing 10 c. The characteristic reflection surface 13c and the light emitting surface 12c of the housing 10c are respectively expanded from the image capturing hole 151 to the light emitting hole 152 in an arc shape, and the light incident surface 11c is annularly located at the periphery of the light emitting hole 152, that is, the light emitting element 20 is disposed at the periphery of the light emitting hole 152, so that the light is projected to the outside through the light emitting hole 152 and the through hole 211. Further, the characteristic reflection surface 13c and the light release surface 12c are separated by the thickness of the housing 10c, such that the characteristic reflection surface 13c is in an arc convex cup shape and serves as the outer surface of the housing 10c, and the light release surface 12c is in an arc concave cup shape and is located in the image capturing passage 15 and serves as the inner surface of the housing 10 c. Compared with the conventional light guide cover 1 shown in fig. 2, the light guide cover 10 in the present embodiment can increase the reflection area of the light source by the reflection portion 14, so that the light provided by the light emitting element 20 can be projected outwards in a uniformly distributed manner, thereby increasing the illuminance of the light projector.
Referring to fig. 7, a fourth embodiment of the light projector according to the present invention is provided, which illustrates that the cover 10d is an arc-petal shape, and the light-condensing curvature of the characteristic reflecting surface 13d is formed by the arc-petal profile of the cover 10 d. Furthermore, the light incident surface 11d is located between the light emitting surface 12d and the characteristic reflection surface 13d in a planar manner, and the characteristic reflection surface 13d and the light emitting surface 12 are separated by the thickness of the cover 10d, so that the characteristic reflection surface 13d and the light emitting surface 12 present the same arc-shaped form. The light provided by the light emitting element 20 is reflected by the characteristic reflecting surface 13d and the reflecting part 14 to be projected to the outside in a uniform distribution mode, so that the illumination of the projector is improved.
The above examples are only for illustrating the preferred embodiments of the present invention, but should not be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the invention, and these changes and modifications are within the scope of the invention.

Claims (10)

1. A light projector capable of increasing the light reflection area, comprising:
the light guide cover is composed of a light-transmitting solid cover body, the surface of the cover body comprises a light incident surface, a light release surface and at least one reflecting surface, and the outer surface of the at least one reflecting surface is covered with a shielding layer;
a plurality of light emitting elements arranged on the light incident surface;
the light emitting elements provide light rays to be projected into the cover body from the light incident surface, and the light rays in the cover body are reflected by the characteristic reflecting surface and the reflecting parts and are projected outwards through the light releasing surface.
2. The light projector as claimed in claim 1, wherein the housing has a conical shape with at least one taper, the light-gathering curvature of the characteristic reflection surface is defined by the conical contour of the housing, a hollow image-capturing channel is formed at the center of the housing, and an image-capturing hole and a light-releasing hole are formed at two ends of the image-capturing channel respectively.
3. The light projector as claimed in claim 2, wherein the light incident surface is located at the periphery of the image capturing hole in a ring shape, the characteristic reflecting surface and the light releasing surface are separated by the thickness of the cover body, so that the characteristic reflecting surface is conical and is used as the outer surface of the cover body, and the light releasing surface is conical and is located in the image capturing channel and is used as the inner surface of the cover body.
4. The light projector as claimed in claim 3, wherein the aperture of the image capturing hole is smaller than that of the light releasing hole, and the characteristic reflection surface and the light releasing surface are respectively inclined toward the light releasing hole from the image capturing hole.
5. The light projector of claim 1, wherein the light emitting elements are annularly spaced in an annular housing, and the annular housing is disposed on the light incident surface.
6. The light projector as claimed in any of claims 2 to 5, wherein the conical cover comprises a plurality of covers with different tapers connected in series.
7. The light projector as claimed in claim 6, wherein the cover portions have different tapers, and the image capturing hole is located in the first cover portion and the light releasing hole is located in the second cover portion.
8. The light projector as claimed in claim 7, wherein the image capturing channel has a central line, and the first cover portion has an inclination angle θ relative to the central line1Is relatively smaller or larger than the inclination angle theta of the second cover part relative to the central line2。
9. The light projector as claimed in claim 1, wherein the housing is an arc cup, the curvature of the light spot of the characteristic reflection surface is defined by the arc cup profile of the housing, a hollow image capturing channel is formed at the center of the housing, and an image capturing hole and a light releasing hole are formed at two ends of the image capturing channel respectively.
10. The light projector as claimed in claim 9, wherein the light incident surface is annularly located at the periphery of the light-releasing hole, the characteristic reflection surface and the light-releasing surface are separated by the thickness of the cover body, so that the characteristic reflection surface is in an arc convex cup shape and is used as the outer surface of the cover body, and the light-releasing surface is in an arc concave cup shape and is located in the image-capturing channel and is used as the inner surface of the cover body.
CN201911201495.3A 2019-11-29 2019-11-29 Light projector capable of increasing light reflection area Pending CN112879867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911201495.3A CN112879867A (en) 2019-11-29 2019-11-29 Light projector capable of increasing light reflection area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911201495.3A CN112879867A (en) 2019-11-29 2019-11-29 Light projector capable of increasing light reflection area

Publications (1)

Publication Number Publication Date
CN112879867A true CN112879867A (en) 2021-06-01

Family

ID=76039247

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911201495.3A Pending CN112879867A (en) 2019-11-29 2019-11-29 Light projector capable of increasing light reflection area

Country Status (1)

Country Link
CN (1) CN112879867A (en)

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