CN217543646U - Optical projection structure based on micro-lens array - Google Patents
Optical projection structure based on micro-lens array Download PDFInfo
- Publication number
- CN217543646U CN217543646U CN202221226366.7U CN202221226366U CN217543646U CN 217543646 U CN217543646 U CN 217543646U CN 202221226366 U CN202221226366 U CN 202221226366U CN 217543646 U CN217543646 U CN 217543646U
- Authority
- CN
- China
- Prior art keywords
- sub
- array
- projection
- lens array
- collimating
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 20
- 239000003086 colorant Substances 0.000 claims abstract description 6
- 238000003491 array Methods 0.000 claims description 20
- 239000006185 dispersion Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 8
- 125000006850 spacer group Chemical group 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 241000777300 Congiopodidae Species 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Landscapes
- Projection Apparatus (AREA)
Abstract
The utility model discloses an optics projection structure based on microlens array, including one or more microlens array projection module, microlens array projection module includes light source and microlens array, and the light source includes the LED array, and the LED array comprises a plurality of sub-LED of the same colour or different colours, and the microlens array includes collimating lens array, field lens array, projection source array, projection mirror array, prism array that set gradually along the light propagation direction; the number of the sub-collimating lenses of the collimating lens array is less than or equal to the number of the sub-LEDs of the LED array and the number of the sub-field lenses of the field lens array, each sub-collimating lens corresponds to at least one sub-LED and at least one sub-field lens, and each sub-field lens of the field lens array, each sub-projection source of the projection source array, each sub-projection lens of the projection lens array and each sub-prism of the prism array correspond to each other one by one. The optical projection structure solves the problem that the projection source has off-axis large field difference, and can realize colorful projection patterns.
Description
Technical Field
The utility model relates to an optics projection structure based on microlens array.
Background
The micro lens array is an array formed by lenses with micron-sized clear aperture and relief depth, and can be applied to an optical projection structure. The minimum functional unit can be a spherical mirror, an aspherical mirror, a cylindrical mirror, a prism and the like as well as a traditional lens, and can realize functions such as focusing, imaging, light beam conversion and the like at a micro-optical angle.
The existing optical projection structure based on the micro-lens array generally has two layers of micro-lens arrays, micro-lens units of the two layers of micro-lens arrays correspond to each other to form a plurality of imaging light paths, in order to avoid influencing definition of projection patterns due to deviation of each imaging light path, a layer of micro-prism array can be additionally arranged, and targeted deflection can be realized on each imaging light path through a micro-prism.
In addition, the existing optical projection structure can only project a fixed pattern, and the pattern can only be monochromatic.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing an optics projection structure based on microlens array solves the problem that the big visual field of off-axis differs in the projection source that current microlens array optics projection structure exists to can realize the transform projection pattern of colored projection pattern and race horse lamp formula.
In order to realize the purpose, the utility model adopts the following technical scheme:
an optical projection structure based on a micro-lens array comprises one or more micro-lens array projection modules, wherein each micro-lens array projection module comprises a light source and a micro-lens array, each light source comprises an LED array, each LED array is composed of a plurality of sub-LEDs with the same color or different colors, and each micro-lens array comprises a collimating lens array, a field lens array, a projection source array, a projection lens array and a prism array which are sequentially arranged along the light propagation direction;
the number of sub-collimating lenses of the collimating lens array is less than or equal to the number of sub-LEDs of the LED array and the number of sub-field lenses of the field lens array, each sub-collimating lens of the collimating lens array corresponds to at least one sub-LED and at least one sub-field lens, each sub-field lens of the field lens array, each sub-projection source of the projection source array, each sub-projection lens of the projection lens array and each sub-prism of the prism array correspond to each other one by one, and the sub-collimating lenses, the sub-field lenses, the sub-projection sources, the sub-projection lenses and the sub-prisms which correspond to each other jointly form a sub-optical projection channel;
after being collimated by the corresponding sub collimating lens, light rays emitted by each sub LED are focused by the corresponding sub collimating lens and then strike the corresponding sub projection source, the light rays passing through each sub projection source are imaged by the corresponding sub projection lens and the transmission direction of the corresponding sub prism is turned, finally, sub projection patterns are formed in a target area, the sub projection patterns formed by all the sub projection sources of the same micro lens array projection module in the target area jointly form projection patterns of the micro lens array projection module, different micro lens array projection modules form respective projection patterns in different areas, and the projection patterns are spliced or partially overlapped with one another to form a complete pattern.
Furthermore, the number of sub-collimating lenses of the collimating lens array is equal to the number of sub-LEDs of the LED array and the number of sub-field lenses of the field lens array, and each sub-collimating lens of the collimating lens array, each sub-LED of the LED array, and each sub-field lens of the field lens array correspond to each other one by one.
Furthermore, the divergence angle of emergent light of each sub-collimating mirror of the collimating mirror array is-5 degrees to 5 degrees.
Furthermore, a spacing layer is arranged between the LED array and the collimating mirror array or between the collimating mirror array and the field lens array, and is used for preventing light crosstalk between adjacent sub-optical projection channels.
Furthermore, spacing layers are arranged between the LED array and the collimating lens array and between the collimating lens array and the field lens array, and are used for preventing light crosstalk between adjacent sub-optical projection channels.
Furthermore, the collimating mirror array is one layer or a plurality of layers, the plurality of layers of collimating mirror arrays are sequentially arranged along the light propagation direction, and the plurality of layers of collimating mirror arrays are made of different materials and have different refractive indexes and dispersion coefficients.
Furthermore, the field lens array is one layer or a plurality of layers, the multi-layer field lens array is sequentially arranged along the light propagation direction, and the multi-layer field lens array is made of different materials and has different refractive indexes and dispersion coefficients.
Furthermore, the projection lens array is one layer or a plurality of layers, the plurality of layers of projection lens arrays are sequentially arranged along the light propagation direction, and the plurality of layers of projection lens arrays are made of different materials and have different refractive indexes and dispersion coefficients.
Furthermore, the prism array is one layer or a plurality of layers, the multilayer prism array is sequentially arranged along the light propagation direction, and the multilayer prism array is made of different materials and has different refractive indexes and dispersion coefficients.
Furthermore, the turning angles of the light rays of the sub-prisms on the sub-optical projection channels where the sub-prisms are located are configured, so that sub-projection patterns formed by the sub-projection sources of the same micro-lens array projection module in the target area are completely overlapped, partially overlapped or spliced together.
Has the advantages that: according to the optical projection structure, the prism array is arranged behind the projection mirror array, and projection sources are incident from a small visual field on the axis relative to the projection mirror array, so that the phase difference is minimum; the light source adopts the LED arrays with the same color or different colors, and the color patterns and the horse race lamp type pattern conversion can be realized by controlling the on-off state, the luminous brightness and the time sequence of different sub-LEDs.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of a microlens array projection module.
FIG. 3 is a first schematic view of a spacer layer structure.
FIG. 4 is a second schematic diagram of a spacer layer structure.
FIG. 5 is a third schematic view of a spacer layer structure.
In the figure: 1-a micro-lens array projection module; 2-an array of LEDs; 3-a first substrate; 4-an array of collimating mirrors; 5-a field lens array; 6-an array of projection sources; 7-an array of projection mirrors; 8-a second substrate; 9-a prism array; 10-a third substrate; 11-spacer layer.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the present invention relates to an optical projection structure based on a microlens array, which includes one or more microlens array projection modules 1. As shown in fig. 2, the microlens array projection module 1 includes a light source and a microlens array, the light source includes an LED array 2, the LED array 2 is composed of a plurality of sub-LEDs of the same color or different colors, and the microlens array includes a collimating lens array 4, a field lens array 5, a projection source array 6, a projection lens array 7, and a prism array 9, which are sequentially arranged along a light propagation direction.
The LED array 2 is arranged on the first substrate 3 and connected with the LED control circuit, and the switches of all the sub-LEDs can be controlled in a unified mode or the switches of all the sub-LEDs can be controlled respectively through the LED control circuit.
The collimating lens array 4 is arranged between the first substrate 3 and the second substrate 8, the field lens array 5, the projection source array 6 and the projection lens array 7 are arranged on the second substrate 8, and the prism array 9 is arranged on the third substrate 10. The number of the sub-collimating lenses of the collimating lens array 4 is less than or equal to the number of the sub-LEDs of the LED array 2 and the number of the sub-field lenses of the field lens array 5, each sub-collimating lens of the collimating lens array 4 corresponds to at least one sub-LED and at least one sub-field lens, and the surface type of each sub-collimating lens and the distance from the LED array 2 to the collimating lens array 4 are configured, so that light rays emitted by at least one sub-LED corresponding to the same sub-collimating lens can only pass through at least one sub-field lens corresponding to the sub-collimating lens after passing through the sub-collimating lens. The sub-field lenses of the field lens array 5, the sub-projection sources of the projection source array 6, the sub-projection lenses of the projection lens array 7 and the sub-prisms of the prism array 9 are in one-to-one correspondence, and the sub-collimating lenses, the sub-field lenses, the sub-projection sources, the sub-projection lenses and the sub-prisms which correspond to each other form a sub-optical projection channel.
When the micro-lens array projection module works, light rays emitted by each sub-LED are collimated by the corresponding sub-collimating lens and then focused on the corresponding sub-projection source through the corresponding sub-field lens, the light rays passing through each sub-projection source are imaged by the corresponding sub-projection lens and the transmission direction of the corresponding sub-prism is turned, and finally sub-projection patterns are formed in a target area, the sub-projection patterns formed in the target area by all the sub-projection sources of the same micro-lens array projection module jointly form projection patterns of the micro-lens array projection module, the different micro-lens array projection modules form respective projection patterns in different areas, and the projection patterns are spliced or partially overlapped with one another to form a complete pattern.
Furthermore, the light turning angles of the sub prisms on the sub optical projection channels where the sub prisms are located are configured, so that sub projection patterns formed by the sub projection sources of the same micro lens array projection module in the target area are completely overlapped, partially overlapped or spliced together to form the projection pattern of the micro lens array projection module.
Preferably, the number of sub-collimating mirrors of the collimating mirror array 4 is equal to the number of sub-LEDs of the LED array 2 and the number of sub-field mirrors of the field mirror array 5, and each sub-collimating mirror of the collimating mirror array 4, each sub-LED of the LED array 2, and each sub-field mirror of the field mirror array 5 correspond to each other one by one. The light rays are changed into light beams with small divergence angles after passing through the collimating mirror array 4, and the divergence angles of emergent light of the sub collimating mirrors of the collimating mirror array are-5 degrees.
As shown in fig. 3 and 4, a spacer layer is disposed between the LED array 2 and the collimator lens array 4 or between the collimator lens array 4 and the field lens array 5, and the spacer layer is made of a light-absorbing material and is used to prevent crosstalk between adjacent sub-optical projection channels. Alternatively, as shown in fig. 5, spacer layers are disposed between the LED array 2 and the collimator lens array 4 and between the collimator lens array 4 and the field lens array 5, so as to prevent crosstalk between light beams of adjacent sub-optical projection channels.
The collimating lens array 4 can be arranged into one layer or a plurality of layers, the plurality of layers of collimating lens arrays 4 are sequentially arranged along the light propagation direction, and the plurality of layers of collimating lens arrays 4 are made of different materials and have different refractive indexes and different dispersion coefficients. The field lens array 5 can be set to one layer or multiple layers, the multiple layers of field lens arrays 5 are sequentially set along the light propagation direction, and the multiple layers of field lens arrays 5 are made of different materials and have different refractive indexes and different dispersion coefficients. The projection lens array 7 can be arranged into one layer or a plurality of layers, the plurality of layers of projection lens arrays 7 are sequentially arranged along the light propagation direction, and the plurality of layers of projection lens arrays 7 are made of different materials and have different refractive indexes and different dispersion coefficients. The prism array 9 can be arranged into one layer or a plurality of layers, the multilayer prism array 9 is sequentially arranged along the light propagation direction, and the multilayer prism array 9 is made of different materials and has different refractive indexes and different dispersion coefficients. When the collimating lens array 4, the field lens array 5, the projecting lens array 7 and the prism array 9 are arranged in a multilayer structure, the effect of eliminating chromatic aberration is achieved by utilizing the chromatic aberration of different substances and the surface type mutual compensation of different curved surfaces.
When the micro-lens array projection module works, the LED arrays 2 of different micro-lens array projection modules are turned on or off in time sharing. If the LED array 2 is composed of sub-LEDs with the same color, the horse race lamp type pattern conversion can be realized by controlling the on-off state, the luminous brightness and the time sequence of different sub-LEDs. If the LED array 2 is formed by sub-LEDs with different colors, such as a blue LED and a yellow LED, the light emitting intensities of the blue sub-LED and the yellow sub-LED are respectively adjusted, and the sub-blue LED and the sub-yellow LED are configured to illuminate at the same position, different color patterns can be realized, and a plurality of such different color patterns form a complete color pattern.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An optical projection structure based on a micro-lens array is characterized in that: the micro-lens array projection module comprises a light source and a micro-lens array, wherein the light source comprises an LED array, the LED array is composed of a plurality of sub-LEDs with the same color or different colors, and the micro-lens array comprises a collimating lens array, a field lens array, a projection source array, a projection lens array and a prism array which are sequentially arranged along the light propagation direction;
the number of sub-collimating lenses of the collimating lens array is less than or equal to the number of sub-LEDs of the LED array and the number of sub-field lenses of the field lens array, each sub-collimating lens of the collimating lens array corresponds to at least one sub-LED and at least one sub-field lens, each sub-field lens of the field lens array, each sub-projection source of the projection source array, each sub-projection lens of the projection lens array and each sub-prism of the prism array correspond to each other one by one, and the sub-collimating lenses, the sub-field lenses, the sub-projection sources, the sub-projection lenses and the sub-prisms which correspond to each other jointly form a sub-optical projection channel;
after being collimated by the corresponding sub collimating lenses, light rays emitted by each sub LED are focused by the corresponding sub collimating lenses and then are projected on the corresponding sub projection sources, the light rays passing through each sub projection source are imaged by the corresponding sub projection lenses and the transmission directions of the corresponding sub prisms are turned, sub projection patterns are finally formed in a target area, the sub projection patterns formed in the target area by all the sub projection sources of the same micro lens array projection module jointly form projection patterns of the micro lens array projection module, the different micro lens array projection modules form respective projection patterns in different areas, and the projection patterns are spliced or partially overlapped with one another to form a complete pattern.
2. A microlens array based optical projection arrangement as claimed in claim 1, wherein: the number of the sub-collimating lenses of the collimating lens array is equal to the number of the sub-LEDs of the LED array and the number of the sub-field lenses of the field lens array, and each sub-collimating lens of the collimating lens array, each sub-LED of the LED array and each sub-field lens of the field lens array correspond to one another.
3. A microlens array based optical projection arrangement as claimed in claim 2, wherein: the divergence angle of emergent light of each sub-collimating mirror of the collimating mirror array is-5 degrees.
4. A microlens array based optical projection arrangement as claimed in claim 3, wherein: and a spacing layer is arranged between the LED array and the collimating lens array or between the collimating lens array and the field lens array and is used for preventing light crosstalk between adjacent sub-optical projection channels.
5. A microlens array based optical projection arrangement as claimed in claim 3, wherein: and spacing layers are arranged between the LED array and the collimating lens array and between the collimating lens array and the field lens array and are used for preventing light crosstalk between adjacent sub-optical projection channels.
6. A microlens array based optical projection arrangement as claimed in claim 1, wherein: the collimating lens array is one layer or multiple layers, the multiple layers of collimating lens arrays are sequentially arranged along the light propagation direction, and the multiple layers of collimating lens arrays are made of different materials and have different refractive indexes and dispersion coefficients.
7. A microlens array based optical projection arrangement as claimed in claim 1, wherein: the field lens array is one layer or multiple layers, the multiple layers of field lens arrays are sequentially arranged along the light propagation direction, and the multiple layers of field lens arrays are made of different materials and have different refractive indexes and dispersion coefficients.
8. A microlens array based optical projection arrangement as claimed in claim 1, wherein: the projection lens array is one layer or a plurality of layers, the plurality of layers of projection lens arrays are sequentially arranged along the light propagation direction, and the plurality of layers of projection lens arrays are made of different materials and have different refractive indexes and dispersion coefficients.
9. A microlens array based optical projection arrangement as claimed in claim 1, wherein: the prism array is one layer or a plurality of layers, the multilayer prism array is sequentially arranged along the light propagation direction, and the multilayer prism array is made of different materials and has different refractive indexes and dispersion coefficients.
10. A microlens array based optical projection arrangement as claimed in claim 1, wherein: and configuring the light turning angle of each sub-prism to the sub-optical projection channel where the sub-prism is located, so that sub-projection patterns formed by each sub-projection source of the same micro-lens array projection module in a target area are completely overlapped, partially overlapped or spliced together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221226366.7U CN217543646U (en) | 2022-05-20 | 2022-05-20 | Optical projection structure based on micro-lens array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221226366.7U CN217543646U (en) | 2022-05-20 | 2022-05-20 | Optical projection structure based on micro-lens array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217543646U true CN217543646U (en) | 2022-10-04 |
Family
ID=83441580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221226366.7U Active CN217543646U (en) | 2022-05-20 | 2022-05-20 | Optical projection structure based on micro-lens array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217543646U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699788A (en) * | 2023-07-04 | 2023-09-05 | 苏州晶方光电科技有限公司 | Manufacturing method and packaging structure of microlens packaging structure |
| CN119189864A (en) * | 2024-11-27 | 2024-12-27 | 福尔达(宁波)智能光电有限公司 | Vehicle with ambient projection lights |
-
2022
- 2022-05-20 CN CN202221226366.7U patent/CN217543646U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699788A (en) * | 2023-07-04 | 2023-09-05 | 苏州晶方光电科技有限公司 | Manufacturing method and packaging structure of microlens packaging structure |
| CN119189864A (en) * | 2024-11-27 | 2024-12-27 | 福尔达(宁波)智能光电有限公司 | Vehicle with ambient projection lights |
| CN119189864B (en) * | 2024-11-27 | 2025-04-08 | 福尔达(宁波)智能光电有限公司 | Vehicle with atmosphere projection lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216896898U (en) | Automobile projection lamp based on super lens | |
| US9404629B2 (en) | Pattern-projecting light-output system | |
| US7645054B2 (en) | Illuminating unit comprising an optical element | |
| US8810752B2 (en) | Thin backlight system and liquid crystal display device using the same | |
| EP3052982B1 (en) | Collimation and homogenization system for an led luminaire | |
| JP4895141B2 (en) | Light color separation system | |
| KR101146705B1 (en) | Composite color separation system | |
| TWI711840B (en) | Led backlight | |
| ITTO950906A1 (en) | COLOR AND IMAGE SELECTIVE MICROFILTER DEVICES. | |
| US5612821A (en) | Micro lens system for controlling an optical beam pattern | |
| US20120218776A1 (en) | Composite color separation system | |
| CN113446572B (en) | Microlens system for motor vehicle headlight | |
| HK1210256A1 (en) | Universal traffic light luminaire | |
| JP5429475B2 (en) | Lighting device and projector | |
| RU2502918C2 (en) | Light-emitting device and method of light emission | |
| CN215728913U (en) | Micro-lens array structure and projection device comprising same | |
| CN216308923U (en) | Point floodlight switching projection module and camera module | |
| US11821608B2 (en) | Lighting device having light-transmissive cover layer between a lens array and a light source array | |
| TWI452402B (en) | Display device | |
| CN114607979A (en) | Light module for a motor vehicle headlight | |
| US10436417B2 (en) | Signalling apparatus for command and/or reporting devices | |
| CN215259364U (en) | Light source device | |
| CN214202033U (en) | Projection display | |
| WO1999020054A1 (en) | Color image projection system | |
| CN213122578U (en) | Light-homogenizing element and projection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |