CN210153588U - Large-area clear and uniform double-sided inclined projection lighting device - Google Patents
Large-area clear and uniform double-sided inclined projection lighting device Download PDFInfo
- Publication number
- CN210153588U CN210153588U CN201921015708.9U CN201921015708U CN210153588U CN 210153588 U CN210153588 U CN 210153588U CN 201921015708 U CN201921015708 U CN 201921015708U CN 210153588 U CN210153588 U CN 210153588U
- Authority
- CN
- China
- Prior art keywords
- micro
- lens
- array
- sided
- double
- 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
Abstract
The utility model discloses a clear even double-sided formula slope projection lighting device of large tracts of land. The micro-lens array combination is a micro-lens structure consisting of a double-sided micro-lens array lens and a light shielding layer with a micro-pattern array clamped between the double-sided micro-lens array lens, and the LED light source, the collimating lens and the micro-lens array combination are sequentially arranged along the direction of an optical axis; light rays emitted by the LED light source are emitted in parallel beams after passing through the collimating lens, vertically enter the micro lens array on one side, pass through the shading layer with the micro pattern array and finally are emitted to an imaging surface from the micro lens array on the other side. The utility model can realize longer depth of field, and the patterns at near and far are clear when the oblique incidence is carried out; by changing the shape of each micro-pattern, more light beams can be irradiated to far positions, and the brightness of the image on the imaging surface is consistent no matter the distance from the projection device is far or near.
Description
Technical Field
The present invention relates to a tilted projection lighting device, and more particularly to a device for realizing large-area clear and uniform tilted projection lighting using a microlens array and a microimage array.
Background
Projection technology is widely used in the fields of image display, greeting illumination, stage illumination and the like. The traditional way is to realize the image projection and illumination functions through the lens combination and the structure of the film. Film is a commonly used film with a designed design, like a photographic negative. The light source irradiates the film after being integrated by one group of lenses, and then the patterns on the film are displayed on an imaging surface by the refraction of the other group of lenses.
This conventional approach is simple but has many application limitations. As shown in fig. 1, the depth of field of the conventional projection method is small, the projected image is only clear at the focus, and the image at a certain distance from the focus becomes blurred. This method is therefore suitable only for front projection illumination. If the method is used for oblique projection illumination, the distance from the imaging surface to the projection device is different, and the image is clear only when the distance is equal to the focal length and is not clear in other places. In addition, in the case of large-area projection illumination, the brightness of the image will be lower the farther away, and the effect will be worse.
In many cases, the projection device can only be placed or mounted inclined to the image plane. Thus, there is a need for a new method for achieving a large-area, clear, and uniformly bright projected image on an imaging surface when the projection device is tilted at an angle (0-90 °) to the imaging surface, despite the fact that the distances of the projection device to different positions on the imaging surface are not uniform.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the background art, the utility model aims to provide a novel tilting projection lighting structure which can realize large area, clarity and uniform brightness by utilizing the combination of a micro-lens array and a micro-pattern array.
The utility model discloses the technical scheme who adopts as follows:
the utility model discloses a circuit board, LED light source, collimating lens and microlens array combination, microlens array combination is the microlens structure that the one deck that is adorned between two-sided microlens array lens and presss from both sides has the light shield layer of micro pattern array to constitute by a two-sided microlens array lens, and two-sided microlens array lens is current complete product, and the LED light source is installed on the circuit board, and LED light source, collimating lens, microlens array combination arrange along the optical axis direction in proper order; light rays emitted by the LED light source are emitted as parallel light beams after passing through the collimating lens, vertically enter the micro lens array on one side of the double-faced micro lens array lens, pass through the shading layer with the micro pattern array and finally are emitted to an imaging surface from the micro lens array on the other side of the double-faced micro lens array lens.
The large area is more than one meter on a side.
The double-sided micro-lens array lens is characterized in that two sides of the double-sided micro-lens array lens are formed by arranging a plurality of micro-lenses in a plane array perpendicular to an optical axis, the light shielding layer with the micro-pattern array is formed by arranging a plurality of light shielding sheets with micro-patterns in a plane array perpendicular to the optical axis, only part of the micro-patterns are transmitted on each light shielding sheet of the micro-pattern array light shielding layer, the part outside the micro-patterns is not transmitted, and the shapes of the micro-patterns on the light shielding sheets are different/not completely the same, so that imaging on an imaging surface which is not perpendicular to the optical axis is clear and.
A micro-pattern array light shielding layer is clamped between the micro-lens arrays on two sides of the double-sided micro-lens array lens, only the micro-pattern part in the micro-pattern array light shielding layer is transparent, the other parts are opaque, and each micro-pattern in the micro-pattern array light shielding layer is different.
Each pair of microlenses corresponds to one micropattern, that is to say a plurality of different micropatterns are sandwiched between two microlens arrays. Most micropatterns are only a portion of them compared to the complete pattern illuminated on the imaging surface. By adjusting the shapes of the micro patterns on different light shielding sheets, more light beams can irradiate the far position of the imaging surface, and less light beams can irradiate the near position of the imaging surface. Therefore, the problem that the distance is darker than the near part can be avoided, the brightness of the pattern on the imaging surface is uniformly distributed, and the effect of brightness, dazzling and clearness at the distance is realized.
The micro lenses in the micro lens arrays on the two sides of the double-sided micro lens array lens and the light shielding sheets of the micro pattern array light shielding layer are the same in quantity, the micro lens arrays on the two sides of the double-sided micro lens array lens are symmetrically arranged with the micro pattern array light shielding layer, and light rays enter one micro lens on one side of the double-sided micro lens array lens and then are converged through a partial light path of the corresponding micro pattern array light shielding layer light shielding sheet shade and then are converged and emitted through the micro lens on the other side of the corresponding double-sided micro lens array lens.
The surfaces of two sides of the collimating lens are respectively a plane and a convex surface, and the convex surface faces away from the LED light source.
The two side surfaces of the micro-lenses in the micro-lens arrays on the two sides of the double-sided micro-lens array lens are respectively a plane and a convex surface: the plane of the micro lens on one side of the double-sided micro lens array lens is back to the collimating lens and the LED light source, and the convex surface of the micro lens faces the collimating lens and the LED light source; the plane of the micro lens on the other side of the double-sided micro lens array lens faces the collimating lens and the LED light source, and the convex surface faces back to the collimating lens and the LED light source.
The micro-lens array combination can be replaced by a double-sided micro-lens array lens and a micro-lens structure which is provided with a light shielding layer with a micro-pattern array and is clamped between the double-sided micro-lens array lens.
The utility model has the advantages that:
the utility model discloses when the slope throws, every microlens adds a micropattern and can all throw a relatively weak pattern at the imaging surface, and superpose these patterns together alright in order to form holistic projection effect. The projection mode can realize longer depth of field, and patterns at near and far positions can be very clear during oblique incidence, so that the oblique projection illumination with large area, clarity and uniform brightness is realized, and the oblique projection illumination device can be used in the technical fields of lamp illumination and the like.
In addition, more light beams can be irradiated to a far position by changing the shape of each micro pattern, so that the image brightness of the imaging surface is consistent no matter the distance from the projection device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the prior art of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of a conventional projection apparatus;
fig. 2 is a schematic diagram of the projection apparatus of the present invention;
wherein FIG. 2(a) is the imaging principle of a single microlens; fig. 2(b) is an imaging principle of a plurality of microlenses.
FIG. 3 is an illustration of several micropattern designs in a micropattern array;
FIG. 4 is a schematic structural diagram of an embodiment of a projection lighting apparatus according to the present invention;
in the figure: the LED light source comprises a circuit board (1), an LED light source (2), a collimating lens (3), a micro-pattern array shading layer (5) and a double-sided micro-lens array lens (7).
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The principle of the device of the present invention is shown in fig. 2(a) and 2 (b). As can be seen in fig. 2(a), the clear aperture of each microlens is very small (typically less than 1mm), and the depth of field of the image becomes very long. Therefore, the projected image in a long range before and after the focus can be made clear.
As can be seen in fig. 2(b), when light is simultaneously projected and imaged from different positions and angles by the sets of microlenses and micropatterns, image superimposition occurs before and after the focal length. The image produced at the front and rear positions of the focal distance and the image size at the focal point are brought closer by the image superimposition. The greater the number of microlenses and micropatterns in the microlens array and micropattern array, the sharper the superimposed image at off-focus distances and the closer the size of the image at focus.
In addition, if the same micro-pattern is used for each pair of micro-lenses, light is relatively strong at a position close to the projection device and light is relatively weak at a position far from the projection device during oblique projection illumination. The image thus formed will be brighter at close and dimmer at far. In this utility model, the shapes of different micro-patterns are designed, so that more light beams irradiate the far place of the imaging surface, and less light beams irradiate the near place of the imaging surface.
As shown in fig. 4, the embodied device includes a circuit board 1, an LED light source 2, a collimating lens 3 and a microlens array assembly, the microlens array assembly includes a double-sided microlens array lens 7 and a microlens structure with a light shielding layer 5 with a micropattern array sandwiched between the double-sided microlens array lens 7, the LED light source 2 is mounted on the circuit board 1, and the LED light source 2, the collimating lens 3 and the microlens array assembly are sequentially arranged along an optical axis direction; the light emitted by the LED light source 2 is emitted as parallel light beams after passing through the collimating lens 3, vertically enters the micro lens array on one side of the double-sided micro lens array lens 7, passes through the light shielding layer 5 with the micro pattern array, and finally is emitted to an imaging surface from the micro lens array on the other side of the double-sided micro lens array lens 7, and the imaging surface can be not vertical to the optical axis in specific implementation.
The two sides of the double-sided micro-lens array lens 7 are formed by arranging a plurality of micro-lenses in a plane array perpendicular to an optical axis, the light shielding layer 5 with the micro-pattern array is formed by arranging a plurality of light shielding sheets with micro-patterns in a plane array perpendicular to the optical axis, only part of the micro-patterns are transparent on each light shielding sheet of the micro-pattern array light shielding layer, the part outside the micro-patterns are opaque, and the shapes of the micro-patterns on each light shielding sheet are different/not completely the same, so that the imaging on the imaging surface which is not perpendicular to the optical axis is clear and bright, and the far and near brightness is consistent.
The micro lenses in the micro lens arrays on the two sides of the double-sided micro lens array lens 7 and the shading pieces of the micro pattern array shading layer 5 are same in quantity and are in one-to-one correspondence, the micro lenses in the micro lens arrays on the two sides of the double-sided micro lens array lens 7 and the shading pieces of the micro pattern array shading layer 5 are arranged on the same straight line parallel to the optical axis, the micro lens arrays on the two sides of the double-sided micro lens array lens 7 are symmetrically arranged with the micro pattern array shading layer 5, and light rays enter one micro lens on one side of the double-sided micro lens array lens 7 and then are converged through a shading piece shading part optical path of the corresponding micro pattern array shading layer 5 and then are converged and emitted through the micro lens on the other side of the corresponding double.
In specific implementation, the two side surfaces of the collimating lens 3 are respectively a plane and a convex surface, the plane faces the LED light source 2, and the convex surface faces away from the LED light source 2.
The two side surfaces of the micro-lenses in the micro-lens arrays on the two sides of the double-sided micro-lens array lens 7 are respectively a plane and a convex surface: the plane of the micro lens on one side of the double-sided micro lens array lens 7 is back to the collimating lens 3 and the LED light source 2, and the convex surface of the micro lens faces the collimating lens 3 and the LED light source 2; the plane of the microlens on the other side of the double-sided microlens array lens 7 faces the collimating lens 3 and the LED light source 2, and the convex surface faces away from the collimating lens 3 and the LED light source 2.
In a specific implementation, the microlens array is composed of tens, hundreds or even thousands of round convex microlenses. The microlenses are arranged in a planar array in a triangular configuration, arranged in a hexagon as shown in fig. 3, with an angle of 60 degrees between the centers of the circles.
Each pair of microlenses corresponds to a single micropattern, that is to say several tens, hundreds or even thousands of different micropatterns are sandwiched between two microlens arrays. Most micropatterns are only a portion of them compared to the complete pattern illuminated on the imaging surface.
For an oblique imaging plane which is not perpendicular to the optical axis, the transmission setting of the micro-pattern for displaying the content at the farther part of the imaging plane is more, and the transmission setting of the micro-pattern for displaying the content at the closer part of the imaging plane is less. The display region may be provided in a stepwise increasing/decreasing number of patterns as shown in fig. 3(b), such as english letters whose overall projection pattern is Happy. In the micro pattern combination, a part contains appy pattern, a part contains ppy pattern, and another part contains py only, as shown in FIG. 3 (a). After the angle between the parallel light emitted from the collimating lens and the imaging plane and the size of the imaged image are determined, the size of each micro pattern in the micro pattern array can be determined according to the energy difference of the light beam irradiating different positions on the imaging plane. The arrangement of these different micropatterns may be random, without order and positional requirements. Thus, when the projection is inclined, the distant pattern has more overlapped projected images, thereby compensating the phenomenon of weak light at a long distance.
An example of a different micropattern design is illustrated in fig. 3. Most micropatterns are only a portion of them, as compared to the complete pattern projected onto the imaging surface.
Examples
The utility model discloses an embodiment is seen in figure 4. The core component of this embodiment comprises a circuit board 1, an LED light source 2, a collimating lens 3 and a microlens structure, which is a double-sided microlens array mirror 7 and a microlens structure sandwiching a light shielding layer 5 with a micropattern array. The collimating lens 3 is arranged in front of the LED light source 2, and the double-sided micro-lens array lens 7 is arranged in front of the collimating lens 3.
Each side of the double-sided microlens array lens is provided with a plurality of identical microlenses, and the microlenses on the two sides are identical in number and correspond to one another. The diameter of each microlens is less than 1 mm.
A light shielding layer with a micro-pattern array is clamped between the double-sided micro-lens array lenses. One for each pair of microlenses. The pattern is partially transparent and the other part is opaque. And each micropattern in the array of micropatterns is different.
Each pair of microlenses plus a micropattern can project a relatively weak pattern on the imaging surface, and the patterns are superposed together to form an integral projection effect on the imaging surface.
The above description is only the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (5)
1. The utility model provides a clear even two-sided formula slope projection lighting device of large tracts of land which characterized in that: the LED light source device comprises a circuit board (1), an LED light source (2), a collimating lens (3) and a micro-lens array combination, wherein the micro-lens array combination is a micro-lens structure consisting of a double-sided micro-lens array lens (7) and a light shielding layer (5) with a micro-pattern array, the light shielding layer is clamped between the double-sided micro-lens array lens (7), the LED light source (2) is arranged on the circuit board (1), and the LED light source (2), the collimating lens (3) and the micro-lens array combination are sequentially arranged along the direction of an optical axis; light rays emitted by the LED light source (2) are emitted as parallel light beams after passing through the collimating lens (3), vertically enter the micro-lens array on one side of the double-sided micro-lens array lens (7), pass through the light shielding layer (5) with the micro-pattern array and finally are emitted to an imaging surface from the micro-lens array on the other side of the double-sided micro-lens array lens (7).
2. The large area clear uniform dual sided oblique projection illumination device of claim 1, wherein: the double-sided micro-lens array lens (7) is characterized in that two sides of the double-sided micro-lens array lens are formed by arranging a plurality of micro-lenses in a plane array perpendicular to an optical axis, the light shielding layer (5) with the micro-pattern array is formed by arranging a plurality of light shielding sheets with micro-patterns in a plane array perpendicular to the optical axis, only part of the micro-patterns are transparent on each light shielding sheet of the micro-pattern array light shielding layer, the parts outside the micro-patterns are opaque, and the shapes of the micro-patterns on each light shielding sheet are different/not completely the same, so that imaging on an imaging surface which is not perpendicular to the optical axis is clear.
3. The large area clear uniform dual sided oblique projection illumination device of claim 1, wherein: the number of the micro lenses in the micro lens arrays on the two sides of the double-sided micro lens array lens (7) is the same as that of the light shielding pieces of the micro pattern array light shielding layer (5), and the micro lens arrays on the two sides of the double-sided micro lens array lens (7) are symmetrically arranged with the micro pattern array light shielding layer (5).
4. The large area clear uniform dual sided oblique projection illumination device of claim 1, wherein: the surfaces of two sides of the collimating lens (3) are respectively a plane and a convex surface, and the convex surfaces face away from the LED light source (2).
5. The large area clear uniform dual sided oblique projection illumination device of claim 1, wherein: the two side surfaces of the micro lenses in the micro lens arrays on the two sides of the double-sided micro lens array lens (7) are respectively a plane and a convex surface: the plane of the micro lens on one side of the double-sided micro lens array lens (7) is back to the collimating lens (3) and the LED light source (2), and the convex surface faces the collimating lens (3) and the LED light source (2); the plane of the micro lens on the other side of the double-sided micro lens array lens (7) faces the collimating lens (3) and the LED light source (2), and the convex surface faces back to the collimating lens (3) and the LED light source (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015708.9U CN210153588U (en) | 2019-07-02 | 2019-07-02 | Large-area clear and uniform double-sided inclined projection lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015708.9U CN210153588U (en) | 2019-07-02 | 2019-07-02 | Large-area clear and uniform double-sided inclined projection lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210153588U true CN210153588U (en) | 2020-03-17 |
Family
ID=69765000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921015708.9U Active CN210153588U (en) | 2019-07-02 | 2019-07-02 | Large-area clear and uniform double-sided inclined projection lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210153588U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260186A (en) * | 2019-07-02 | 2019-09-20 | 杭州欧光芯科技有限公司 | A kind of clear uniform oblique projection lighting device of large area |
-
2019
- 2019-07-02 CN CN201921015708.9U patent/CN210153588U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260186A (en) * | 2019-07-02 | 2019-09-20 | 杭州欧光芯科技有限公司 | A kind of clear uniform oblique projection lighting device of large area |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102608768B (en) | LED-based two-sided stereo display device of optical grating and preparation method thereof | |
| KR0130057B1 (en) | A projection type liquid crystal | |
| JPH0351882A (en) | Projection-type image display device | |
| CN111505892A (en) | Projection system based on micro-lens array | |
| US20160178965A1 (en) | Display device and manufacturing method of the same | |
| US3302016A (en) | Optical collimating system | |
| US20180059475A1 (en) | Optics component with double-layered micro-lens array | |
| EP0507599B1 (en) | Apparatus for assembling an optical device | |
| JP2012042879A (en) | Lens sheet, surface light source device, transmission type display device, and method for manufacturing lens sheet | |
| CN210153588U (en) | Large-area clear and uniform double-sided inclined projection lighting device | |
| CN210372944U (en) | Large-area clear and uniform separated type inclined projection lighting device | |
| CN101258447B (en) | Exposure apparatus | |
| CN214174812U (en) | Novel oblique projection device | |
| CN106483734A (en) | Light fixture | |
| CN110260186A (en) | A kind of clear uniform oblique projection lighting device of large area | |
| CN116931350A (en) | Miniature imaging system and device | |
| JP2009053263A (en) | Optical control element and panel, and optical control device using the same | |
| CN212929894U (en) | Light path refraction structure of pattern lamp | |
| KR920010622B1 (en) | Optical lighting system | |
| CN209149046U (en) | A kind of projection signal's lamp | |
| CN106907650A (en) | The greeting lamp optical element and its method for designing of a kind of generation ring of light combination pattern | |
| CN217034491U (en) | Miniature imaging system and device | |
| CN114791683A (en) | Light-emitting module, display module and display device | |
| CN112008974A (en) | Optical lens group for photocuring 3D printer | |
| CN217060744U (en) | Integrated projection imaging system and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |