CN214202033U - Projection display - Google Patents
Projection display Download PDFInfo
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- CN214202033U CN214202033U CN202120423870.5U CN202120423870U CN214202033U CN 214202033 U CN214202033 U CN 214202033U CN 202120423870 U CN202120423870 U CN 202120423870U CN 214202033 U CN214202033 U CN 214202033U
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Abstract
The utility model discloses a projection display, which comprises a light source, a screen and an optical channel array arranged between the light source and the screen, the optical channel array sequentially comprises a first optical curved surface array, an object plane array, a second optical curved surface array and a prism array along the light propagation direction, wherein mutually corresponding sub-optical light-gathering curved surfaces, sub-object planes, sub-optical projection curved surfaces and sub-prisms jointly form a sub-optical projection channel, light passing through the sub-object planes is imaged by the sub-projection curved surfaces and then deflected in the propagation direction by the sub-prisms, forming an image of a sub-object plane on the screen, wherein the optical axes of the sub-optical condensing curved surface, the sub-object plane and the sub-optical projection curved surface are all superposed with the optical axis of the sub-optical projection channel, configuring the deflection angle of the sub-prism relative to the optical axis of the sub-optical projection channel, so that the images of all the sub-object planes on the screen are superposed or combined into a complete pattern to be projected. The utility model overcomes the problem that produces the off-axis aberration when the light incident optics projection curved surface that current product exists.
Description
Technical Field
The utility model relates to a projection display, this projection display is based on the microlens array framework.
Background
DE 102009024894 a1 discloses a projection display based on a microlens array framework, which includes a light source and a regularly arranged optical channel array, where the optical channel array includes a first optical curved surface array, an object plane array and a second optical curved surface array, each sub-optical light-gathering curved surface in the first optical curved surface array corresponds to each sub-object plane in the object plane array and each sub-optical projection curved surface in the second optical curved surface one-to-one, the distance from the sub-optical projection curved surface to the sub-object plane is equal to the focal length of the sub-optical projection curved surface, and the distance from the sub-object plane to the sub-optical light-gathering curved surface satisfies kohler illumination mode. The projection display is arranged by utilizing the micro-lens array to form a multi-channel framework, images transmitted by the sub-optical projection curved surfaces are overlapped on a screen, and compared with a traditional single-channel projection display with the same imaging brightness, the total length of the whole system is greatly reduced, and the projection display can have very high imaging brightness under the condition that the total length of the projection system is limited.
The projection display is characterized in that: the optical axis of the optical projection curved surface and the optical axis of the optical condensing curved surface are deviated, so that imaging aberration is generated when light enters the optical projection curved surface.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing a projection display produces the problem of off-axis aberration when overcoming the light incident optics projection curved surface that current product exists.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a projection display comprising a light source, a screen, and an array of optical channels disposed between the light source and the screen, characterized in that: the optical channel array sequentially comprises a first optical curved surface array, an object surface array, a second optical curved surface array and a prism array along the light propagation direction, wherein each sub-optical light-gathering curved surface in the first optical curved surface array respectively corresponds to each sub-object surface in the object surface array, each sub-optical projection curved surface in the second optical curved surface and each sub-prism in the prism array one by one, the sub-optical light-gathering curved surfaces, the sub-object surfaces, the sub-optical projection curved surfaces and the sub-prisms which correspond to each other jointly form a sub-optical projection channel, the diopter of the sub-optical light-gathering curved surfaces is configured to enable light passing through the sub-optical light-gathering curved surfaces to sequentially pass through the corresponding sub-object surfaces, the sub-optical projection curved surfaces and the sub-prisms, the light passing through the sub-object surfaces is firstly imaged by the sub-projection curved surfaces and then deflected by the sub-prisms in the propagation direction, and forming images of sub object planes on a screen, wherein the optical axes of the sub optical condensation curved surfaces, the optical axes of the sub object planes and the optical axes of the sub optical projection curved surfaces are all superposed with the optical axes of the sub optical projection channels, the optical axes of all the sub optical projection channels are parallel to each other, and the deflection angles of the sub prisms relative to the optical axes of the sub optical projection channels are configured, so that the images of all the sub object planes on the screen are superposed with each other or combined into a complete pattern to be projected.
Furthermore, the light source adopts a uniform plane light source lighting structure.
Furthermore, the diopter of the sub-optical light-gathering curved surface and the distance from the sub-optical light-gathering curved surface to the sub-object surface meet a critical illumination mode, so that an image of the light source passing through the sub-optical light-gathering curved surface is superposed with the sub-object surface.
Furthermore, the same light-transmitting material is filled between the first optical curved surface array and the object plane array.
Furthermore, N layers of different light-transmitting materials are filled between the object plane array and the second optical curved surface array, wherein N is an integer greater than or equal to 1.
Furthermore, the same light-transmitting material is filled between the second optical curved surface array and the prism array.
Has the advantages that: compare in prior art, the regional unable for the optical axis symmetry of optical curved surface of effective refraction light of projection lens, can produce great off-axis aberration, the structure, optics spotlight curved surface, object plane and the optical projection curved surface of sub-optics projection passageway have adopted the optical axis of sharing to arrange, do not have eccentric settings each other, furthest's reduction the imaging aberration.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1-a light source; 2-a sub-optical light-gathering curved surface; 3-a-son noodle; 4-a sub-optical projection surface; 5-screen; 6-optical axis; 7-sub-prisms.
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 projection display of the present invention comprises a light source, a screen and an optical channel array disposed between the light source and the screen, wherein the optical channel array sequentially comprises a first optical curved surface array, an object surface array, a second optical curved surface array and a prism array along a light propagation direction, each sub-optical condensing curved surface in the first optical curved surface array respectively corresponds to each sub-object surface in the object surface array, each sub-optical projection curved surface in the second optical curved surface and each sub-prism in the prism array one-to-one, the sub-optical condensing curved surfaces, the sub-object surfaces, the sub-optical projection curved surfaces and the sub-prisms which correspond to each other jointly form a sub-optical projection channel, and the diopter of the sub-optical condensing curved surfaces is configured such that the light passing through the sub-optical condensing curved surfaces only sequentially passes through the corresponding sub-object surfaces, sub-optical projection curved surfaces and sub-prisms, the light rays passing through the sub object plane are imaged by the sub projection curved surface and then deflected in the transmission direction by the sub prism, an image of the sub object plane is formed on the screen, the optical axis of the sub optical light-gathering curved surface, the optical axis of the sub object plane and the optical axis of the sub optical projection curved surface are all overlapped with the optical axis of the sub optical projection channel, the optical axes of all the sub optical projection channels are parallel to each other, and the deflection angle of the sub prism relative to the optical axis of the sub optical projection channel is configured, so that the images of all the sub object planes on the screen are overlapped or combined into a complete pattern to be projected.
In this embodiment, for each sub-optical projection channel, the position of the sub-object plane on the screen can be changed by adjusting the deflection angle of the sub-prism with respect to the optical axis of the sub-optical projection channel, as shown in fig. 1, when all the sub-optical projection channel sub-prisms are in a horizontal state, the images of all the sub-object planes on the screen are in a dispersed state, the deflection angles of the sub-prisms are adjusted according to the positions of the sub-optical projection channels, the sub-prisms in the sub-optical projection channels on the left side deflect towards the right side, so that the image of the sub-object plane on the screen translates to the right, the sub-prisms in the sub-optical projection channels on the right deflect to the left, the image of the sub object plane on the screen is translated leftwards, the deflection angle adjustment amount of the sub prism can be obtained by calculation with the translation amount required by the image of the sub object plane, and finally the images of all the sub object planes on the screen are mutually overlapped.
The utility model discloses in, the image of sub-object plane divide into two kinds of circumstances, one kind is that the image of each sub-object plane is unanimous with treating the projection pattern, is in the same place the image of each sub-object plane is complete overlapping this moment, and another kind is the image of each sub-object plane and regards as a part of treating the projection pattern, is to assemble the complete projection pattern of treating with the image of each sub-object plane this moment.
In the embodiment, the light source adopts a uniform plane light source illumination structure, so that the projection light path can be arranged to be Kohler illumination or critical illumination. For the critical illumination mode, the image of the light source passing through the sub-optical condensing curved surface is coincided with the sub-object surface by limiting the diopter of the sub-optical condensing curved surface and the distance from the sub-optical condensing curved surface to the sub-object surface.
The same light-transmitting material is filled between the first optical curved surface array and the object plane array. The distance between the first optical curved surface array and the object plane array is limited by the light-transmitting material, and the light-transmitting material is used as a conduction channel of light rays.
N layers of different light-transmitting materials are filled between the object plane array and the second optical curved surface array, wherein N is an integer greater than or equal to 1. The distance between the object plane array and the second optical curved surface array is defined by N layers of different kinds of light-transmitting materials, and the N layers of different kinds of light-transmitting materials include but are not limited to: ultraviolet light curing glue and glass.
And the same light-transmitting material is filled between the second optical curved surface array and the prism array. The distance between the second optical curved surface array and the prism array is limited by the light-transmitting material, and the light-transmitting material is used as a transmission channel of light rays.
For the projection display structure disclosed in the prior patent (DE 102009024894 a1), the chief ray of each point on the wavefront of the light-emitting surface of the sub-optical light-gathering curved surface passes through the corresponding optical projection curved surface, and the optical projection curved surfaces are not symmetrical when the chief ray enters due to the deviation of the optical projection curved surfaces, so that off-axis phase difference occurs.
The utility model discloses a projection display structure, optics spotlight curved surface, object plane and the optics projection curved surface of sub-optics projection passageway have adopted the optical axis of sharing to arrange, do not have eccentric settings each other, and fundamentally has avoided above-mentioned aberration, not only is applicable to kohler's lighting system, is applicable to ordinary critical lighting system equally. The patterns on each sub-object plane are magnified and imaged and then are superposed on the screen, the displayed image is clear, each part in the light source image is magnified and imaged on the screen, the image of the light source on the screen is uniform (fuzzy), and the definition of the target image cannot be obviously influenced.
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 (6)
1. A projection display comprising a light source, a screen, and an array of optical channels disposed between the light source and the screen, characterized in that: the optical channel array sequentially comprises a first optical curved surface array, an object surface array, a second optical curved surface array and a prism array along the light propagation direction, wherein each sub-optical light-gathering curved surface in the first optical curved surface array respectively corresponds to each sub-object surface in the object surface array, each sub-optical projection curved surface in the second optical curved surface and each sub-prism in the prism array one by one, the sub-optical light-gathering curved surfaces, the sub-object surfaces, the sub-optical projection curved surfaces and the sub-prisms which correspond to each other jointly form a sub-optical projection channel, the diopter of the sub-optical light-gathering curved surfaces is configured to enable light passing through the sub-optical light-gathering curved surfaces to sequentially pass through the corresponding sub-object surfaces, the sub-optical projection curved surfaces and the sub-prisms, the light passing through the sub-object surfaces is firstly imaged by the sub-optical projection curved surfaces and then deflected by the sub-prisms in the propagation direction, and forming images of sub object planes on a screen, wherein the optical axes of the sub optical condensation curved surfaces, the optical axes of the sub object planes and the optical axes of the sub optical projection curved surfaces are all superposed with the optical axes of the sub optical projection channels, the optical axes of all the sub optical projection channels are parallel to each other, and the deflection angles of the sub prisms relative to the optical axes of the sub optical projection channels are configured, so that the images of all the sub object planes on the screen are superposed with each other or combined into a complete pattern to be projected.
2. A projection display according to claim 1, wherein: the light source adopts a uniform plane light source lighting structure.
3. A projection display according to claim 1 or 2, wherein: the diopter of the sub-optical light-gathering curved surface and the distance from the sub-optical light-gathering curved surface to the sub-object surface meet a critical illumination mode, so that an image of the light source passing through the sub-optical light-gathering curved surface is superposed with the sub-object surface.
4. A projection display according to claim 1, wherein: and the same light-transmitting material is filled between the first optical curved surface array and the object plane array.
5. A projection display according to claim 1, wherein: n layers of different light-transmitting materials are filled between the object plane array and the second optical curved surface array, and N is an integer greater than or equal to 1.
6. A projection display according to claim 1, wherein: and the same light-transmitting material is filled between the second optical curved surface array and the prism array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120423870.5U CN214202033U (en) | 2021-02-26 | 2021-02-26 | Projection display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120423870.5U CN214202033U (en) | 2021-02-26 | 2021-02-26 | Projection display |
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| Publication Number | Publication Date |
|---|---|
| CN214202033U true CN214202033U (en) | 2021-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120423870.5U Active CN214202033U (en) | 2021-02-26 | 2021-02-26 | Projection display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114924415A (en) * | 2022-05-12 | 2022-08-19 | 拾斛科技(南京)有限公司 | Virtual display equipment |
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2021
- 2021-02-26 CN CN202120423870.5U patent/CN214202033U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114924415A (en) * | 2022-05-12 | 2022-08-19 | 拾斛科技(南京)有限公司 | Virtual display equipment |
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