CN116224703A - Projection optical engine structure, projection device and wearable equipment - Google Patents
Projection optical engine structure, projection device and wearable equipment Download PDFInfo
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- CN116224703A CN116224703A CN202310517948.3A CN202310517948A CN116224703A CN 116224703 A CN116224703 A CN 116224703A CN 202310517948 A CN202310517948 A CN 202310517948A CN 116224703 A CN116224703 A CN 116224703A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
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Abstract
The embodiment of the application provides a projection optical engine structure, a projection device and wearable equipment; the projection optical engine structure comprises a curved light-emitting screen and a projection lens; the luminous surface of the curved luminous screen is a concave surface, so that outgoing light rays can be gathered, and the curvature K of the curved luminous screen is as follows: k is more than 0 and less than pi/L 1 ，L 1 The aperture of the effective luminous area of the curved luminous screen is set; the projection lens is positioned on the light-emitting path of the curved light-emitting screen, light emitted by the curved light-emitting screen is obliquely projected to the projection lens, and the projection lens is used for directly projecting and imaging the light. The projection light engine structure provided by the embodiment of the application can have higher brightness under the condition of small volume.
Description
Technical Field
The embodiment of the application relates to the technical field of optical imaging, in particular to a projection optical engine structure, a projection device and wearable equipment.
Background
In the AR optical field, as a core component of an AR product, an optical engine structure is required to provide sufficient brightness on the basis of a small size. At present, the display screen in the AR product is a planar structure, light rays emitted by the display screen are distributed in parallel, namely, the incident angle (CRA) of the chief ray is almost 0 degrees and is incident to the projection system, thus, the light rays received by the projection system are very limited, the light entering amount of the projection system is limited, and therefore, the brightness of the product is influenced, and the imaging effect is further influenced.
Disclosure of Invention
The purpose of this application is to provide a projection optical engine structure, projection arrangement and wearable equipment's new technical scheme, and curved surface luminescent screen can realize the spotlight effect of light, does benefit to the light inlet quantity that increases projection lens to can improve projection imaging's luminance.
In a first aspect, the present application provides a projection optical engine architecture. The projection optical engine structure includes:
the curved surface luminescent screen, the light emitting area of curved surface luminescent screen is the concave surface, can make the light gathering that goes out, the camber K of curved surface luminescent screen is: k is more than 0 and less than pi/L 1 ，L 1 The aperture of the effective luminous area of the curved luminous screen is set; and
the projection lens is positioned on the light-emitting path of the curved light-emitting screen, light emitted by the curved light-emitting screen is obliquely projected to the projection lens, and the projection lens is used for directly projecting and imaging the light.
Optionally, the curved luminescent screen is provided as one.
Optionally, in the case that the curved light emitting screen is provided with at least two curved light emitting screens, the projection optical engine structure further includes a light combining device, the light combining device is located between the light outgoing paths of the curved light emitting screens, and the light combining device is configured to combine the light emitted by the curved light emitting screens into one beam of light and project the light into the projection lens.
Optionally, the curved surface luminous screen is three, and the light combining device is a light combining prism and comprises three light incident surfaces and one light emergent surface;
the curved light-emitting screens are arranged in one-to-one correspondence with the light incident surfaces, and the light incident surfaces are arranged adjacently with the corresponding curved light-emitting screens;
the projection lens is arranged adjacent to the light emergent surface.
Optionally, the light combining device comprises a light combining prism or a light combining lens;
the light combining lens comprises an optical lens and a film material arranged on the optical lens.
Optionally, the curved luminous screen comprises a curved substrate and a light source arranged on the curved substrate; the light source comprises a plurality of light emitting units which are arranged in a target array, and each light emitting unit can emit visible light.
Optionally, the curved substrate is a silicon substrate, and the silicon substrate includes a concave surface, and the plurality of light emitting units are disposed on the concave surface.
Optionally, the curved substrate includes a planar silicon substrate and a lens layer disposed on one side of the planar silicon substrate, and a surface of the lens layer facing away from the planar silicon substrate is a concave surface;
the plurality of light emitting units are arranged on the planar silicon substrate, and the lens layer covers the plurality of light emitting units.
Optionally, the lens layer comprises a glass material.
In a second aspect, the present application provides a projection apparatus, the projection apparatus comprising:
a housing; and
the optical module of the first aspect.
In a third aspect, the present application provides a wearable device comprising:
a housing; and
the optical module of the first aspect.
The beneficial effects of this application are:
according to the projection optical engine structure provided by the embodiment of the application, the light-emitting mode of the curved surface light-emitting screen is adopted, the light-gathering effect of emitted light is improved, and the light-entering quantity of the projection lens can be improved, so that the brightness of projection imaging is improved.
Other features of the present specification and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and together with the description, serve to explain the principles of the specification.
Fig. 1 is a schematic structural diagram of a curved luminescent screen according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a projection optical engine according to an embodiment of the present disclosure;
FIG. 3 is a second schematic diagram of a projection optical engine according to an embodiment of the present disclosure;
fig. 4 is a schematic structural view of a curved luminescent screen according to another embodiment of the present application;
FIG. 5 is a third schematic diagram of a projection optical engine according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a projection optical engine according to an embodiment of the present disclosure;
FIG. 7 is a diagram showing the relationship between the light emission intensity and the light emission angle of the light emitting unit;
FIG. 8 is a graph of the light-emitting effect of a curved light-emitting screen and a planar screen;
FIG. 9 is a second view of the light-emitting effect of a curved light-emitting screen and a planar screen;
FIG. 10 is a third view of the light-emitting effect of a curved light-emitting screen and a planar screen;
FIG. 11 is a diagram showing the light-emitting effect of a curved light-emitting screen and a planar screen;
FIG. 12 is a fifth view of the light-emitting effect of a curved light-emitting screen and a planar screen;
FIG. 13 is a diagram showing the light-emitting effect of a curved light-emitting panel and a flat panel.
Reference numerals illustrate:
1. curved surface luminous screen; 11. a curved substrate; 111. a planar silicon substrate; 112. a lens layer; 12. a light emitting unit; 2. a projection lens; 3. a light combining device; 31. a light incident surface; 32. a light-emitting surface; 01. light rays; 02. a planar screen.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The projection optical engine structure, the projection device and the wearable device provided by the embodiment of the application are described in detail below with reference to the accompanying drawings.
According to an embodiment of the present application, a projection optical engine structure is provided, which may be, for example, an optical engine applied in an AR device, but of course, also be applied in products having a projection imaging function, such as home projectors.
According to the projection optical engine structure provided in the embodiment of the application, referring to fig. 1, 2, and fig. 4 and 5, the projection optical engine structure includes a curved light emitting screen 1 and a projection lens 2. Wherein, the light emitting surface of curved surface luminescent screen 1 sets up to the concave surface, can make the light 01 gathering of outgoing, the camber K of curved surface luminescent screen 1 is: k is more than 0 and less than pi/L 1 ，L 1 Is the caliber of the effective luminous area of the curved luminous screen 1. The projection lens 2 is located on the light-emitting path of the curved luminous screen 1, the light 01 emitted by the curved luminous screen 1 is projected to the projection lens 2 in an inclined manner, and the projection lens 2 is used for directly projecting and imaging the light 01.
According to the projection optical engine structure provided in the above embodiment of the present application, the curved luminescent screen 1 is adopted therein, and the use of the curved luminescent screen 1 can increase the collecting capability of the emitted light 01. And, arrange the projection lens 2 and lay on the light-emitting path of the said curved surface luminescent screen 1, the light 01 that is launched via the said curved surface luminescent screen 1 can be projected and imaged in the said projection lens 2 directly.
It should be emphasized that the light emitting surface of the curved light emitting screen 1 has a certain curvature, such as the curvature range mentioned in the above embodiment, so as to improve the light gathering effect, so that the light entering amount of the projection lens 2 can be increased, and thus the brightness condition of the whole projection optical engine structure can be improved, which is beneficial to improving the final projection imaging quality.
Referring to fig. 2 and 5, the projection lens 2 can shape the incident light 01 and emit the light in a nearly parallel light form, and finally can form projection images at a certain distance, that is, form an enlarged virtual image. So that the user can see the imaged picture.
Wherein the curved luminescent screen 1 comprises for example a plurality of light emitting units 12. The light emitting unit 12 is, for example, an LED lamp bead.
Taking the curved surface luminous screen 1 with 0.13 inch as an example, when the curvature K of the luminous surface is 0.2, the brightness of the formed projection optical engine structure (such as an AR ray machine) can be improved by about 10%, and meanwhile, the volume of the whole projection optical engine structure is not remarkably increased, so that the scheme design with small volume and high brightness is realized.
In the embodiment of the present application, the light receiving device may include a separate projection lens 2, or may include a projection lens and a light combining device 3 according to the number and the position distribution of the curved luminescent screen 1.
The projection optical engine structure provided in the above embodiment of the present application adopts the curved light emitting screen 1, which brings advantages in two aspects: on the one hand, the brightness of the whole projection optical engine structure can be increased by arranging the light emitting units to the maximum extent; on the other hand, the curved luminous screen 1 improves the light-gathering effect of the light emission, and can increase the light-entering quantity under the condition that the diaphragm of the projection lens 2 is fixed, thereby improving the brightness.
The projection optical engine structure provided in the above embodiment of the present application can increase the light entering amount of the projection lens 2 on the basis of a predetermined small volume.
In some examples of the present application, referring to fig. 2 and 5, the curved luminescent screen 1 is provided as one.
According to the above example, the projection optical engine structure includes, for example, a curved light emitting screen 1 and a projection lens 2, where the projection lens 2 is designed to be located on the light emitting path of the curved light emitting screen 1, and the light ray 01 emitted by the curved light emitting screen 1 can directly enter the projection lens 2 to perform projection imaging. The projection lens 2 may shape the light ray 01, and finally form a visible virtual image at a certain distance.
When the curved luminous screen 1 is arranged as one, the projection lens 2 does not need to be provided with a light combining device.
In addition, the curved luminous screen 1 may be a single-color light source or a full-color light source.
In some examples of the present application, referring to fig. 3 and fig. 6, in the case where the curved luminescent screens 1 are provided in at least two, the projection optical engine structure further includes a light combining device 3, where the light combining device 3 is located between the light outgoing paths of the curved luminescent screens 1, and the light combining device 3 is configured to combine the light rays 01 emitted by the curved luminescent screens 1 into one beam of light rays, and project the light rays into the projection lens 2.
According to the above example, the projection optical engine structure includes, but is not limited to, only providing a single curved luminescent screen 1, wherein two or more curved luminescent screens 1 may also be provided as desired. Along with the increase of the number of the curved luminous screens 1, the brightness of the projection optical engine structure can be increased, the quality of projection imaging can be better improved, and the immersion experience of a user is further improved.
When the projection optical engine structure includes two or more curved luminescent screens 1, based on that the curved luminescent screens 1 are distributed at different positions/directions, before the light rays 01 emitted by the curved luminescent screens 1 are incident on the projection lens 2, the light rays 01 emitted by the curved luminescent screens 1 are subjected to beam combination treatment, and then enter the projection lens 2 to perform projection imaging. Therefore, the light combining device 3 in the above example needs to be provided between the light-outgoing paths of the different curved luminescent screens 1.
The different curved luminous screens 1 can be designed, for example, to emit light in different wavelength bands, and each curved luminous screen 1 can be designed, for example, to emit light in one wavelength band.
Of course, each curved luminescent screen 1 may emit light in a different wavelength band.
Referring to fig. 7, the intensity of the light emitted from the light emitting unit 12 is related to the light emitting angle. For example, when the light emission angle (CRA angle) is 0 degrees, the intensity of the emitted light is maximum, and as the light emission angle increases, the intensity of the emitted light tends to be significantly reduced. In the case where the size of the projection lens 2 or the light combining device 3 is fixed, the light of the marginal field of view may enter at an incidence angle of 0 degrees, and a portion of the chief ray of greater than 0 degrees may enter, see the views shown on the left side of fig. 8 and 9.
In one example, as shown in fig. 3 and fig. 6, the curved luminous screen 1 is three, the light combining device 3 is a light combining prism, and the light combining prism includes, for example, three light incident surfaces 31 and one light emergent surface 32. The curved luminous screens 1 and the light incident surfaces 31 are arranged in a one-to-one correspondence, and the light incident surfaces 31 and the corresponding curved luminous screens 1 are arranged adjacently; the projection lens 2 is disposed adjacent to the light-emitting surface 32.
The design of the curved luminous screen 1 is three, so that the projection optical engine structure can obviously increase the light entering quantity of the projection lens 2 on the basis of a given small volume.
In some examples of the present application, the light combining device 3 includes a light combining prism or a light combining lens;
the light combining lens comprises an optical lens and a film material arranged on the optical lens.
That is, the light combining device 3 may be a light combining prism. Of course, the light combining device 3 may be an optical lens, and a corresponding filter film may be attached to the optical lens.
In some examples of the present application, referring to fig. 1 and 3, the curved luminescent screen 1 includes a curved substrate 11 and a light source disposed on the curved substrate 11; the light source comprises a plurality of light emitting units 12 arranged in a target array, and each light emitting unit 12 can emit visible light.
On the same curved luminescent screen 1, the plurality of light emitting units 12 may emit light of the same wavelength band (same color). Of course, on the same curved luminous screen 1, the plurality of luminous units 12 may emit light rays of different wavebands, which is not limited in this application.
In one example, referring to fig. 1, the curved substrate 11 is a silicon substrate, and the silicon substrate includes a concave surface, and the plurality of light emitting units 12 are disposed on the concave surface.
According to the above example, a structure of a curved light emitting screen is proposed, in which the curved substrate 11 is a silicon substrate having a curved surface, and the plurality of light emitting units 12 are arranged in a target array on the surface of the silicon substrate, increasing the light extraction and collection capability.
Referring to fig. 2, a projection optical engine structure is proposed, which includes the structure of the curved luminescent screen 1 shown in the above example, and referring to fig. 1, the curved luminescent screen 1 has a simple structure, and the light emitting units 12 are directly arranged on the silicon substrate with a curved surface, so that the light entering amount of the projection lens 2 can be increased on the basis of a given small volume.
Referring to fig. 3, the projection optical engine structure shown in fig. 3 is a three-color projection optical engine structure that is combined by a light combining device 3 (X-cube), and includes a curved light emitting screen as shown in fig. 1.
In another example, referring to fig. 4, the curved substrate 11 includes a planar silicon substrate 111 and a lens layer 112 disposed on one side of the planar silicon substrate 111, and a surface of the lens layer 112 facing away from the planar silicon substrate 111 is concave. The plurality of light emitting units 12 are disposed on the planar silicon substrate 111, and the lens layer 112 covers the plurality of light emitting units 12.
Wherein the lens layer 112 comprises a glass material.
According to the above example, another curved luminescent screen structure is proposed, see fig. 4, which is a lens layer 112 with an arc surface added to the planar luminescent screen structure. The lens layer 112 may allow light emitted from the light emitting units 12 to pass through, and may also protect the respective light emitting units 12.
Alternatively, the lens layer 112 may be attached to the surface of the planar silicon substrate 111 using, for example, optical cement, and the lens layer 112 may be formed on the surface of the planar silicon substrate 111 using plastic injection molding.
Since the surface of the lens layer 112 facing away from the planar silicon substrate 111 is concave, the lens layer 112 increases the light collection capability.
Referring to fig. 5, a projection optical engine structure is proposed, which includes the structure of the curved light emitting screen 1 shown in the above example, and referring to fig. 4, the light emitting units 12 are arranged on the planar silicon substrate 111, and a lens layer 112 with a cambered surface is covered thereon, so that the light entering amount of the projection lens 2 can be increased on the basis of a given small volume.
Referring to fig. 6, the projection optical engine structure shown in fig. 6 is a three-color projection optical engine structure for combining colors by a light combining device 3 (X-cube), which includes a curved light emitting screen as shown in fig. 4.
It should be emphasized that, in the case of ensuring that the 0 degree CRA light direction and the optical axis direction are smaller than 90 degrees, the light-collecting capability of the lens layer 112 of the curved surface increases with the increase of the refractive index, and the material of the lens layer 112 is preferably glass.
According to the embodiment of the application, a projection optical engine structure is provided, wherein a curved light-emitting screen is adopted, and on one hand, the brightness of the projection optical engine structure is increased by arranging the light-emitting units 12 to the maximum extent; on the other hand, the curved surface design of the light emitting surface improves the light gathering effect of the light emitting screen, and can increase the light incoming quantity under the condition that the diaphragm of the projection lens 2 is fixed, thereby improving the brightness.
According to the projection optical engine structure provided by the embodiment of the application, the projection optical engine structure has the following beneficial effects:
first, the brightness of the projection optical engine structure is improved.
In the embodiment of the present application, the curved luminous screen 1 is adopted, see fig. 1 and fig. 4, respectively, and the curved luminous screen 1 adopts two different structural designs, but is based on that the light sources are all arranged on a curved surface, and the light sources comprise a plurality of luminous units 12, so that the brightness of the projection optical engine structure can be increased by arranging the luminous units 12 to the maximum extent. On the other hand, the plurality of light emitting units 12 are distributed on a curved surface to improve the light condensing effect of the light emitting screen, and can increase the light entering amount under the condition that the diaphragm of the projection lens 2 is fixed, thereby improving the brightness of the projection optical engine structure.
Taking a 0.13 inch curved surface luminous screen as an example, when the curvature K is 0.2, the brightness of the projection optical engine structure is improved by about 10 percent.
Second, the volume of the projection optical engine structure is reduced.
Under the condition that the brightness requirement of the projection optical engine structure is certain, the light rays emitted by the curved luminous screen 1 are more concentrated, so that the size of a light receiving device such as the light combining device 3 can be smaller after the light rays 01 are emitted from the curved luminous screen 1.
Referring to fig. 10 and fig. 11, the size of the light combining device 3 corresponding to the flat panel 02 is taken as a reference, where the light combining device 3 may be a light combining lens, referring to fig. 10, and the light combining device 3 may be a light combining prism, referring to fig. 11. With continued reference to the right side of fig. 10 and 11, when the curved luminescent screen 1 is used, the size of the light combining device 3 is obviously reduced relatively, and the reduction of the side length is as follows:
2H=L 2 * tan α, where α is an angle between an edge tangent line of the curved luminescent screen 1 and a vertical direction, L 2 The distance from the light-emitting screen 1 to the light incident surface 31 is set to be the curved surface.
The size of the light combining device 3 is reduced, so that the size of the whole projection optical engine structure is smaller.
Thirdly, the light efficiency of the projection optical engine structure is improved.
Referring to the right side of fig. 12 and 13, in the manner of the curved light emitting screen 1, when the light receiving unit, that is, the light combining device 3 has a certain size, the light with the edge view field except for 0 degree CRA enters the projection lens, and some CRA with the edge view field larger than 0 degree may enter the light machine.
On the one hand, by arranging the light emitting units 12 to the maximum, the light utilization rate is increased; on the other hand, the curved surface distribution improves the light condensing effect of the light emitting screen, and the light inlet quantity can be increased under the condition that the lens diaphragm is fixed, so that the light efficiency is improved. Taking a curved luminous screen 1 with 0.13 inch as an example, when the curvature K is 0.2, the luminous efficiency of the projection optical engine structure is improved by about 10 percent.
According to another embodiment of the present application, a projection apparatus is provided. The projection device includes: a housing and a projection optical engine structure as described above.
The projection device is, for example, a projector in various forms, such as a home projector and a vehicle-mounted projector, which is not limited in the embodiment of the present application.
The housing may have a different structure based on the type of the projection device. The projection optical engine structure is arranged in the shell.
According to yet another embodiment of the present application, a wearable device is provided. The wearable device includes a housing and a projection optical engine structure as described above.
The wearable device comprises a head mounted display device, such as AR glasses or AR helmets, in which case the projection optical engine structure may form an AR light engine, for example. Of course, the wearable device may also be a VR product, etc., which is not limited in this embodiment of the present application.
The specific implementation manner of the projection device and the wearable device in the embodiments of the present application may refer to each embodiment of the projection optical engine structure, so that the projection device and the wearable device at least have all the beneficial effects brought by the technical solutions of the embodiments, which are not described in detail herein.
The foregoing embodiments mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in consideration of brevity of line text, no further description is given here.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (11)
1. A projection optical engine structure, comprising:
the curved surface luminescent screen (1), the light emitting surface of curved surface luminescent screen (1) is the concave surface, can make the light (01) gathering of outgoing, the camber K of curved surface luminescent screen (1) is: k is more than 0 and less than pi/L 1 ，L 1 The aperture of the effective luminous area of the curved luminous screen (1); and
the projection lens (2), projection lens (2) are located on the light-emitting path of curved surface luminescent screen (1), through projection that curved surface luminescent screen (1) outgoing light (01) slope reaches projection lens (2), projection lens (2) are used for with light (01) direct projection formation of image.
2. A projection optical engine arrangement according to claim 1, characterized in that the curved luminescent screen (1) is provided as one.
3. The projection optical engine structure according to claim 1, wherein in the case that the curved light emitting screens (1) are provided in at least two, the projection optical engine structure further comprises a light combining device (3), the light combining device (3) is located between the light emitting paths of the curved light emitting screens (1), and the light combining device (3) is used for combining the light rays (01) emitted by the curved light emitting screens (1) into one beam of light rays and projecting the light rays into the projection lens (2).
4. A projection optical engine structure according to claim 3, wherein the number of the curved light emitting screens (1) is three, and the light combining device (3) is a light combining prism and comprises three light incident surfaces (31) and one light emergent surface (32);
the curved luminous screens (1) and the light incident surfaces (31) are arranged in one-to-one correspondence, and the light incident surfaces (31) and the corresponding curved luminous screens (1) are arranged adjacently;
the projection lens (2) is arranged adjacent to the light emitting surface (32).
5. A projection optical engine arrangement according to claim 3, characterized in that the light combining means (3) comprises a light combining prism or a light combining lens;
the light combining lens comprises an optical lens and a film material arranged on the optical lens.
6. The projection optical engine arrangement according to any of claims 1-5, characterized in that the curved luminescent screen (1) comprises a curved substrate (11) and a light source arranged on the curved substrate (11); the light source comprises a plurality of light emitting units (12) which are arranged in a target array, and each light emitting unit (12) can emit visible light.
7. The projection optical engine structure according to claim 6, wherein the curved substrate (11) is a silicon substrate, and the silicon substrate includes a concave surface, and the plurality of light emitting units (12) are disposed on the concave surface.
8. The projection optical engine structure according to claim 6, wherein the curved substrate (11) comprises a planar silicon substrate (111) and a lens layer (112) disposed on one side of the planar silicon substrate (111), and a surface of the lens layer (112) facing away from the planar silicon substrate (111) is a concave surface;
the plurality of light emitting units (12) are disposed on the planar silicon substrate (111), and the lens layer (112) covers the plurality of light emitting units (12).
9. The projection optical engine structure of claim 8, wherein the lens layer (112) comprises a glass material.
10. A projection apparatus, comprising:
a housing; and
the projection optical engine architecture of any one of claims 1-9.
11. A wearable device, comprising:
a housing; and
the projection optical engine architecture of any one of claims 1-9.
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| JP2015138148A (en) * | 2014-01-22 | 2015-07-30 | 株式会社リコー | Projection optical system, image projection device, and expanded image shift adjustment method |
| CN115793357A (en) * | 2021-09-10 | 2023-03-14 | 深圳光峰科技股份有限公司 | Liquid crystal projection system |
| CN114384741A (en) * | 2021-12-23 | 2022-04-22 | 广景视睿科技（深圳）有限公司 | Double-reflection type micro-projection optical engine |
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