CN210401991U - Light-emitting device and projection display device - Google Patents
Light-emitting device and projection display device Download PDFInfo
- Publication number
- CN210401991U CN210401991U CN201921594857.5U CN201921594857U CN210401991U CN 210401991 U CN210401991 U CN 210401991U CN 201921594857 U CN201921594857 U CN 201921594857U CN 210401991 U CN210401991 U CN 210401991U
- Authority
- CN
- China
- Prior art keywords
- lens
- reflecting unit
- light
- unit
- light beam
- 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.)
- Active
Links
Images
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The embodiment of the utility model discloses illuminator and projection display device. The light emitting device includes: a light source generating an incident light beam; the first lens converges and images the incident beam on an image point of the first lens; the first reflection unit reflects the incident light beam converged at the image point to the second lens, and the incident light beam passes through the second lens and then irradiates the second reflection unit to form a reflected light beam; the second reflecting unit is a curved surface reflector, and reflects the reflected light beam and then emits the reflected light beam; the first reflection unit and the second lens are both positioned at the focal point of the second reflection unit; the first reflecting unit is opposite to the reflecting surface of the second reflecting unit; the light source, the first lens, the second lens, the first reflection unit and the second reflection unit are all arranged along the central axis of the first lens. The utility model discloses technical scheme illuminator is simple, and product illumination luminance is higher, and product processing cost is lower, application that can be better to the outdoor lighting.
Description
Technical Field
The embodiment of the utility model provides an optics light-emitting structure relates to illumination or projection field, especially relates to remote laser flashlight or similar lighting system.
Background
Laser light has been widely used as a light source in outdoor remote lighting and projection display industries because of its high brightness.
However, the conventional light emitting device is complicated, the brightness of the conventional light emitting device cannot meet the outdoor complex environment, and the conventional light emitting device is high in processing cost and expensive.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a light emitting device and projection display device to light emitting device is simple portable and product illumination luminance is higher in realizing the outdoor lighting, and the processing cost who realizes the product simultaneously is lower.
An embodiment of the utility model provides a light-emitting device, include:
a light source for generating an incident light beam;
the first lens is used for converging and imaging the incident beam on an image point of the first lens;
a first reflection unit, a second lens, and a second reflection unit;
the first reflection unit is used for reflecting the incident light beams converged at the image point to the second lens, and irradiating the incident light beams to the second reflection unit after passing through the second lens to form reflected light beams; the second reflecting unit is a curved surface reflector; the second reflecting unit reflects the reflected light beam and then emits the reflected light beam; the first reflection unit and the second lens are both positioned at the focal point of the second reflection unit; the first reflecting unit is opposite to the reflecting surface of the second reflecting unit; the light source, the first lens, the second lens, the first reflection unit and the second reflection unit are all arranged along a central axis of the first lens.
The utility model discloses technical scheme, first lens assemble the light beam that the light source produced in the image point of first lens, and the second lens will assemble incident beam reflection to second reflection unit at the image point to first reflection unit, and then the emergence realizes the illumination after the reflection of second reflection unit, chooses less lens to realize lighting device, and the device simple structure, product processing cost are low. In addition, the first reflection unit and the second lens are located at the focus of the second reflection unit, the light source, the first lens, the second lens, the first reflection unit and the second reflection unit are arranged on the same optical axis, and the first reflection unit and the second lens are located at the focus of the second reflection unit.
Drawings
Fig. 1 is a schematic structural diagram of a light-emitting device in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another light-emitting device in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another light-emitting device in an embodiment of the present invention;
fig. 4 is an imaging schematic diagram of a first lens in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another light-emitting device in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a light emitting device according to an embodiment of the present invention, as shown in fig. 1, the light emitting device includes a light source 1 for generating an incident light beam 10; the first lens 2 is used for converging and imaging the incident light beam 10 on an image point 20 of the first lens 2; a first reflecting unit 4, a second lens 3, and a second reflecting unit 5; the first reflecting unit 4 is used for reflecting the incident light beam 10 converged at the image point 20 to the second lens 3, and irradiating the incident light beam to the second reflecting unit 5 after passing through the second lens 3 to form a reflected light beam 50; the second reflecting 5 unit is a curved surface reflector; the second reflecting unit 5 reflects the reflected light beam 50 and emits it. The first reflecting unit 4 and the second lens 3 are both located at the focal point 51 of the second reflecting unit 5; the first reflecting unit 4 is opposite to the reflecting surface of the second reflecting unit 5; the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4, and the second reflecting unit 5 are disposed along a central axis of the first lens 2.
Specifically, the first reflection unit 4 reflects the incident light beam 10 focused at the image point 20 to the second lens 3, irradiates the second reflection unit 5 through the second lens 3 to form a reflected light beam 50, and emits the reflected light beam 50. The second lens 3 can perform angle constraint on the light beam reflected by the first reflecting unit 4, so that the aperture of the second reflecting unit 5 is reduced, and the volume of the light-emitting device is further reduced. The embodiment of the utility model provides a light emitting device just can form reflected light beam 50 and outgoing through first lens 2, second lens 3, first reflection unit 4 and second reflection unit 5, and light source 1, second lens 3, first reflection unit 4 and second reflection unit 5 all set up along the center pin of first lens 2, compare in other products, have simple structure, the installation degree of difficulty is little, convenient to use, the higher advantage of reliability.
Fig. 1 exemplarily sets the image point 20 of the first lens 2 to coincide with the focal point 51 of the second reflecting unit, referring to fig. 1, the image point 20 of the first lens 2 coincides with the focal point 51 of the second reflecting unit, so that after the first reflecting unit 4 receives the incident light beam 10 of the light source 1, the incident light beam 10 of the light source 1 converges on the image point 20 and is irradiated to the second reflecting unit 5 through the second lens 3, and the reflected light beam 50 reflected by the second reflecting unit 5 is emitted as a light beam parallel to the central axis of the first lens 2, and the brightness is high.
In other embodiments, the image point 20 of the first lens 2 may not coincide with the focal point 51 of the second reflecting unit. Referring to fig. 2, the image point 20 of the first lens 2 is located at the right side of the focal point 51 of the second reflecting unit 5, and the incident light beam 10 of the light source 1 is not completely converged into one image point when being incident on the first reflecting unit 4. The first reflecting unit 4 receives the incident light beam 10 from the light source 1 and then irradiates the second reflecting unit 5 through the second lens 3, and the reflected light beam 50 reflected by the second reflecting unit 5 exits in a direction converging on the central axis of the first lens 2. Therefore, the light beam finally emitted by the light-emitting device has a small illumination spot irradiated to the outside, and the brightness is higher during short-distance illumination.
Referring to fig. 3, the image point 20 of the first lens 2 may also be located to the left of the focal point 51 of the second reflecting unit. The incident beam 10 of the light source 1 converges at the image point 20 of the first lens 2 and then diverges, and the beam reaching the first reflecting unit 4 has a certain divergence, so that the first reflecting unit 4 receives the incident beam 10 of the light source 1 and then irradiates the second reflecting unit 5 through the second lens 3, the reflected beam 50 reflected by the second reflecting unit 5 is emitted in a diverging manner, and the illumination spot of the reflected beam 50 irradiating an external light path becomes larger. When the light emitting device is used for long-distance illumination, the illumination light spots of the light beams finally emitted by the light emitting device are enlarged, and long-distance illumination can be met.
Optionally, with reference to fig. 1, the first reflecting unit 4 includes a phosphor coating 40 and a substrate 41, a plane of the substrate 41 is perpendicular to a central axis of the first lens 2, the phosphor coating 40 is located on a side surface of the substrate 41 facing the second reflecting unit 5, the phosphor coating 40 receives the incident light beam 10 emitted from the light source 1, and the surface of the phosphor coating 40 reflects light beams of different colors to the second lens 3.
It should be noted that, after receiving the incident light beam 10 emitted from the light source 1, the phosphor coating 40 excites the surface of the phosphor coating 40 to generate a light beam, and the light beam passes through the second lens 3 and then irradiates the second reflecting unit 5. The fluorescent powder layers 40 of different materials can be selected to excite to generate light beams of different colors. The light emitting device can be a flashlight, light beams emitted by a flashlight light source irradiate on the surface of the fluorescent powder layer to excite the light beams to generate different colors, in order to meet market requirements, the light beams which can be excited by the selected fluorescent powder layer are white light, blue light, purple light and the like, the light beams with different colors irradiate the second reflecting unit 5 through the first lens 3, the reflected light beams 50 with different colors are generated through the second reflecting unit 5, and further the market requirements for the color irradiation of the flashlight are met. The light emitting device may also be a projection device, the light beam emitted by the light source of the projection device excites the phosphor layer to generate light beams with different colors, the light beams with different colors are irradiated to the second reflecting unit 5 through the first lens 3, and the second reflecting unit 5 reflects the reflected light beams 50 with different colors to form a color effect of a picture of the projection device.
Specifically, with continued reference to fig. 1, the curved surface of the second reflecting unit 5 is a paraboloid or a sphere, the first lens 2 is a biconvex lens, the second lens 3 is a plano-convex lens, and the convex surface of the second lens 3 faces the second reflecting unit 5.
Fig. 1 exemplarily sets the curved surface of the second reflecting unit 5 to be a paraboloid, and obtains specific parameters of the paraboloid according to the selected surface type of the paraboloid, thereby calculating the position of the focal point 51 of the second reflecting unit 5. The first lens 2 is a biconvex lens, an incident light beam 10 generated by the light source 1 is converged at an image point 20 of the first lens 2 after passing through the first lens 2, and the biconvex lens is selected to converge the incident light beam 10 generated by the light source 1. The second lens 3 is a plano-convex lens, and the second lens 3 mainly irradiates the light beam reflected by the first reflecting unit 4 to the second reflecting unit 5 to form a reflected light beam 50. The plane of the second lens 3 is next to the first reflection unit 4, and the convex surface faces the second reflection unit 5, and is used for performing angle constraint on the light beam reflected by the first reflection unit 4, and reducing the divergence of the light beam, so that the aperture of the second reflection unit 5 is reduced, and the volume of the light-emitting device is further reduced.
Fig. 4 is a schematic diagram of an imaging principle of the first lens according to an embodiment of the present invention, and as shown in fig. 4, distances between the light source 1, the second lens 3, and the first reflection unit 4 and the image point 20 of the first lens 2 are all fixed. The distance between the image point 20 of the first lens 2 and the focal point 51 of the second reflecting unit 5 in a direction parallel to the central axis of the first lens 2 is adjustable. The distance between the light source 1 and the first lens 2 is an object distance, which is represented by H1, the distance between the image point 20, which is a point imaged by the first lens 2, and the first lens 2 is an image distance, which is represented by H2.
Specifically, when the position of the first lens 2 relative to the light source 1 is determined, the object distance H1 is determined, and the position where the incident light 10 of the light source 1 converges on a point through the first lens 2 is the image point 20 of the first lens 2. When the image point 20 of the first lens 2 coincides with the focal point 51 of the second reflecting unit 5, the incident light beam 10 of the light source 1 reaches the second reflecting unit 5 through the light beam reflected by the first reflecting unit 3 and is reflected, and the reflected light beam 50 exits in a direction parallel to the central axis of the first lens 2. When the light source 1 moves leftward along the central axis of the first lens 2, the position of the incident light beam 10 of the light source 1 passing through the image point 20 of the first lens 2 is located on the left side of the focal point 51 of the second reflecting unit 5, the incident light beam 10 reaching the focal point 50 after converging at the image point 20 has a certain divergence, the incident light beam 10 of the light source 1 passing through the first reflecting unit 3 is reflected after reaching the second reflecting unit 5, and the reflected light beam 50 exits in the divergence direction. When the light source 1 moves rightward along the central axis of the first lens 2, the position of the incident beam 10 of the light source 1 passing through the image point 20 of the first lens 2 is located on the right side of the focal point 51 of the second reflecting unit 5, the incident beam 10 reaching the focal point 51 of the second reflecting unit 5 is not completely converged at the image point, the incident beam 10 of the light source 1 passes through the beam reflected by the first reflecting unit 3 and then reaches the second reflecting unit 5 to be reflected, and the reflected beam 50 is emitted in the direction converging on the central axis of the first reflecting unit 2.
Fig. 5 is a schematic structural diagram of another light emitting device according to an embodiment of the present invention, and as shown in fig. 5, the light emitting device further includes a protective cover 6, and a plane of the protective cover 6 is perpendicular to a central axis of the first lens.
Specifically, the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover 6 can be in an assembly linkage form, and the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover 6 are controlled to move along a direction parallel to the central axis of the first lens through the integral linkage of the assemblies. The light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover plate 6 can also be made into independent adjustable structures, namely, a non-component linkage mode is adopted, the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover plate 6 are respectively grouped to form independent adjustable mechanisms, and the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover plate 6 are adjusted to move along the direction parallel to the central axis of the first lens.
Illustratively, referring to fig. 5, the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover 6 are arranged in an assembly linkage manner, the second reflecting unit 5 is in a fixed structure, and when the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover 6 are adjusted in a linkage manner, so that the second lens 3 and the first reflecting unit 4 are located at a focal point of the second reflecting unit and an image point 20 of the first lens 2 coincides with a focal point 51 of the second reflecting unit 5, a reflected light beam 50 of the second reflecting unit 5 is a collimated light beam. When the linkage adjusting light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover plate 6 move rightwards along the central axis of the first lens 2, the image point 20 of the first lens 2 is positioned on the right side of the focus 50 of the second reflecting unit, and the light beam 50 reflected by the second reflecting unit 5 is a converged light beam, so that the requirement of short-distance illumination is met. When the linkage adjusting light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover 6 move leftwards along the central axis of the first lens 2, the image point 20 of the first lens 2 is positioned on the left side of the focal point 51 of the second reflecting unit 5, and the light beam 50 reflected by the second reflecting unit 5 is a diverging light beam, so that the requirement of illumination at a longer distance is met.
Optionally, the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover 6 are respectively arranged in an independent adjustable structure, the mutual positions of the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover 6 are respectively and independently adjusted, and when the image point 20 of the first lens 2 coincides with the focus 51 of the second reflecting unit 5, the reflected light beam 50 of the second reflecting unit 5 is a collimated light beam; when the mutual positions among the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4 and the protective cover 6 are adjusted so that the image point 20 of the first lens 2 is positioned at the right side of the focal point 50 of the second reflecting unit, the second reflecting unit 5 reflects the light beam 50 as a convergent light beam; when mutual positions among the light source 1, the first lens 2, the second lens 3, the first reflecting unit 4, and the protective cover 6 are adjusted such that the image point 20 of the first lens 2 is located to the left of the focal point 51 of the second reflecting unit 5, the second reflecting unit 5 reflects the light beam 50 as a divergent light beam.
It should be noted that the light source 1, the first lens 2, the second lens 3, the first reflection unit 4, and the protective cover 6 may be set to be in an assembly linkage form or in an independently adjustable structure, the second reflection unit 5 is a fixed position, or the light source 1, the first lens 2, the second lens 3, the first reflection unit 4, and the protective cover 6 may be set to be a fixed position, and the second reflection unit 5 is an adjustable structure, as long as it is ensured that the distance between the image point 20 of the first lens 2 and the focal point 51 of the second reflection unit 5 is adjustable along a direction parallel to the central axis of the first lens 2.
Preferably, the light source 1 is a laser. The light source 1 is selected as a laser, and compared with a common light source, the laser has the advantages of good monochromaticity, high brightness and good directivity.
Preferably, the distance between the light source 1 and the first lens 2 ranges from 4mm to 6 mm; the curvature radius of the second lens 3 ranges from 1mm to 5 mm. The distance between the light source 1 and the first lens 2 is an object distance, the object distance is set to be 4 mm-6 mm, and the position of the image point 20 of the first lens 2 can be determined according to an object image formula, so that the overall length of the device is reduced, and the volume of the light-emitting device is further reduced. The curvature radius range of the second lens 3 is selected to be 1 mm-5 mm, and according to the curvature radius range of the second lens 3, the irradiation range of the incident beam 10 which is reflected by the first reflection unit 4 and then irradiates the reflected beam to the second reflection unit 5 through the second lens 3 can be determined. The light-emitting device has a more compact overall structure by selecting a proper curvature radius.
The beneficial effects of the utility model are that first reflection unit will assemble incident beam reflection to the second lens at the image point, shine to second reflection unit formation reflected light beam through the second lens to jet out the reflected light beam. The second lens can carry out angle constraint on the light beam reflected by the first reflecting unit, so that the aperture of the second reflecting unit is reduced, and the volume of the light-emitting device is further reduced. The reflecting light beam can be formed and emitted through the first lens, the second lens, the first reflecting unit and the second reflecting unit, the light source, the second lens, the first reflecting unit and the second reflecting unit are arranged along the central shaft of the first lens, the whole structure is simple, the installation difficulty is small, the use is convenient, the reliability is high, and the application prospect is good.
The embodiment of the utility model provides a projection display device is still provided, including any one light emitting device in the above-mentioned embodiment. Because this projection display device has adopted the utility model discloses the embodiment provides a light-emitting device, consequently possesses the beneficial effect that this light-emitting device has equally. Alternatively, the projection display device provided by the present invention may be an illumination device, such as a flashlight. The utility model provides a projection display device can also be projection arrangement, for example projecting apparatus etc..
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A light-emitting device, comprising:
a light source for generating an incident light beam;
the first lens is used for converging and imaging the incident beam on an image point of the first lens;
a first reflection unit, a second lens, and a second reflection unit;
the first reflection unit is used for reflecting the incident light beams converged at the image point to the second lens, and irradiating the incident light beams to the second reflection unit after passing through the second lens to form reflected light beams; the second reflecting unit is a curved surface reflector; the second reflecting unit reflects the reflected light beam and then emits the reflected light beam; the first reflection unit and the second lens are both positioned at the focal point of the second reflection unit; the first reflecting unit is opposite to the reflecting surface of the second reflecting unit; the light source, the first lens, the second lens, the first reflection unit and the second reflection unit are all arranged along the central axis of the first lens.
2. The light-emitting device according to claim 1, wherein the first reflecting unit includes a phosphor coating and a substrate;
the plane of the substrate is vertical to the central axis of the first lens; the fluorescent powder coating is positioned on one side surface of the substrate facing the second reflecting unit.
3. The lighting device as claimed in claim 2, wherein the phosphor coating receives the incident light beam emitted from the light source, and the surface of the phosphor coating reflects the light beam with different colors to the second lens.
4. The lighting device as claimed in claim 1, wherein the curved surface of the second reflecting unit is a paraboloid or a sphere.
5. The light-emitting device according to claim 1, wherein the first lens is a biconvex lens, and the second lens is a planoconvex lens; the convex surface of the second lens faces the second reflecting unit.
6. The light-emitting device according to claim 1, wherein distances between the light source, the second lens, and the first reflecting unit and an image point of the first lens are fixed in a direction parallel to a central axis of the first lens;
the distance between the image point of the first lens and the focal point of the second reflecting unit is adjustable along the direction parallel to the central axis of the first lens.
7. The lighting device of claim 1, wherein the light source is a laser.
8. The light-emitting device according to claim 1, wherein a distance between the light source and the first lens is in a range of 4mm to 6 mm; the curvature radius range of the second lens is 1 mm-5 mm.
9. The lighting device according to claim 1, further comprising a protective cover plate, wherein a plane of the protective cover plate is perpendicular to a central axis of the first lens.
10. A projection display device comprising the light-emitting device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921594857.5U CN210401991U (en) | 2019-09-24 | 2019-09-24 | Light-emitting device and projection display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921594857.5U CN210401991U (en) | 2019-09-24 | 2019-09-24 | Light-emitting device and projection display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210401991U true CN210401991U (en) | 2020-04-24 |
Family
ID=70341993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921594857.5U Active CN210401991U (en) | 2019-09-24 | 2019-09-24 | Light-emitting device and projection display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210401991U (en) |
-
2019
- 2019-09-24 CN CN201921594857.5U patent/CN210401991U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6767111B1 (en) | Projection light source from light emitting diodes | |
| US7185985B2 (en) | Illumination apparatus and image projection apparatus using the illumination apparatus | |
| JP4792486B2 (en) | Optical system for Fresnel lens light, especially spotlight or floodlight | |
| CN108291702B (en) | Light source device, lighting device, and vehicle lamp | |
| US8905578B2 (en) | Laser array illumination for bright projectors | |
| JPH09281413A (en) | Illumination optical device | |
| JP2012220821A (en) | Light guide, lighting device, and electronic apparatus | |
| CN210401991U (en) | Light-emitting device and projection display device | |
| US11519586B2 (en) | Lamp | |
| US9904161B2 (en) | Lighting device for generating light by means of wavelength conversion | |
| JP2009053263A (en) | Optical control element and panel, and optical control device using the same | |
| JP6749084B2 (en) | LED lighting device | |
| JP2007114459A (en) | Light source device and video display apparatus using same | |
| JP2010140745A (en) | Illuminating device and projection type image display device | |
| WO2013118272A1 (en) | Illumination optical system and projection-type display device | |
| US20140369023A1 (en) | Laser-phosphor device with laser array | |
| TWI547667B (en) | Light-emitting module and light-emitting device | |
| US11251347B2 (en) | Semiconductor light source | |
| CN111947054A (en) | Laser light source device | |
| TW200408784A (en) | Multiple lamps illumination system | |
| TW201000822A (en) | Optical adder | |
| JP6659240B2 (en) | LED lighting device | |
| CN213903968U (en) | Light beam splitting device | |
| CN105318239B (en) | Light emitting device for vehicle | |
| CN213237059U (en) | Lighting device and lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |