CN218995801U - Light engine image turns to structure and AR equipment - Google Patents
Light engine image turns to structure and AR equipment Download PDFInfo
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- CN218995801U CN218995801U CN202320170142.7U CN202320170142U CN218995801U CN 218995801 U CN218995801 U CN 218995801U CN 202320170142 U CN202320170142 U CN 202320170142U CN 218995801 U CN218995801 U CN 218995801U
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The utility model discloses a light engine image steering structure and AR equipment, the light engine image steering structure comprises: the light engine is used for emitting initial image light; and the turning structure is arranged on the transmission light path of the initial image light and comprises a reflecting surface for turning the initial image light into turned image light. The utility model changes the propagation direction of the initial image light by using the turning structure arranged on the propagation light path of the initial image light, so that the initial image light is turned to the required position direction, and the problem of different image directions caused by different arrangement positions of the light engines in different structures is solved.
Description
Technical Field
The utility model relates to the technical field of optical display, in particular to an optical engine image steering structure and AR equipment.
Background
Augmented Reality (AR) is a technology for increasing the perception of the real world by a user through information provided by a computer system, and superimposes computer-generated virtual objects, scenes or system prompt information into the real scene, thereby realizing the enhancement of reality.
The current AR display devices mostly use optical waveguides and light engines to display, the display panel of the light engines is generally rectangular and needs to be placed in the correct direction, after the image sent by the display panel passes through the relay optical device, the finally output image can also be rectangular in the forward direction, but the placement direction of the light engines needs to consider the appearance and the volume of the light engines. In AR complete machines, the light engine is usually placed horizontally or laterally, and the light engine cannot output a desired image direction due to the influence of the shape and the volume on the placement direction of the light engine.
Disclosure of Invention
The embodiment of the utility model provides a light engine image steering structure and AR equipment, which aim to solve the problem that the image direction is not satisfied due to the limitation of the arrangement direction of light engines in different structures.
The utility model provides a light engine image steering structure, comprising:
the light engine is used for emitting initial image light;
and the turning structure is arranged on the transmission light path of the initial image light and comprises a reflecting surface for turning the initial image light into turned image light.
Further, the steering structure is a steering prism group, the steering prism group comprises at least 3 steering prisms with the same structure, the 3 steering prisms are arranged in a split mode or an integrated mode, and each steering prism is provided with an entrance pupil surface, a reflecting surface and an exit pupil surface.
Further, the 3 steering prisms are a first steering prism, a second steering prism and a third steering prism respectively;
the first steering prism comprises a first entrance pupil surface, a first reflecting surface and a first exit pupil surface which are positioned on the same optical path; the second turning prism comprises a second entrance pupil surface, a second reflecting surface and a second exit pupil surface which are positioned on the same optical path; the third turning prism comprises a third entrance pupil plane, a third reflection plane and a third exit pupil plane which are positioned on the same optical path;
the first entrance pupil plane is arranged opposite to the exit pupil position of the light engine, and the first reflection plane reflects the image light for the first time and exits from the first exit pupil plane; the second entrance pupil plane is stacked on the first exit pupil plane, and the second reflection plane reflects the image light for the second time and exits from the second exit pupil plane; the third entrance pupil plane is stacked on the second exit pupil plane, and the third reflection plane performs third reflection on the image light and exits from the third exit pupil plane.
Further, the third exit pupil plane is oriented to coincide with the exit pupil orientation of the light engine.
Further, the steering prism is made of glass or resin, and the reflection surface of the steering prism is plated with a reflection enhancing film.
Further, the turning prism is arranged to absorb light except for an entrance pupil plane, an exit pupil plane and a reflecting plane.
Furthermore, the steering prism is an isosceles right triangular prism, two rectangular surfaces which are arranged at right angles in the isosceles right triangular prism are respectively an entrance pupil surface and an exit pupil surface, and the other rectangular surface is a reflecting surface.
Further, the steering structure is a reflector group, and the reflector group at least comprises one reflector.
Furthermore, the steering structure is arranged at the exit pupil position of the light engine through a fixing structure, and the fixing structure is a clamping structure.
The embodiment of the utility model also provides AR equipment, which comprises the light engine image steering structure.
The embodiment of the utility model provides a light engine image steering structure and AR equipment, wherein the light engine image steering structure comprises: the light engine is used for emitting initial image light; and the turning structure is arranged on the transmission light path of the initial image light and comprises a reflecting surface for turning the initial image light into turned image light. Compared with the prior art, the utility model changes the propagation direction of the initial image light by using the steering structure arranged on the propagation light path of the initial image light, so that the initial image light is steered to the required position direction, and the problem of different image directions caused by different arrangement positions of the light engines in different structures is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a light engine image steering structure according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a first steering prism according to an embodiment of the present utility model;
FIG. 3 is a schematic view of an optical path of a light engine image steering structure according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a light engine image steering structure according to an embodiment of the present utility model;
FIG. 5 is a schematic view of a light engine image steering structure according to an embodiment of the present utility model;
FIG. 6 is a schematic view of another embodiment of a light engine image steering structure according to the present utility model;
fig. 7 is a schematic structural diagram of an application of a light engine image steering structure to AR equipment according to an embodiment of the present utility model;
fig. 8 is a schematic diagram of another structure of an optical engine image steering structure applied to an AR device according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1, an optical engine image steering structure provided in an embodiment of the present utility model specifically includes:
a light engine 100 for emitting initial image light;
and a turning structure provided on the propagation light path of the initial image light, the turning structure including a reflection surface for turning the initial image light into a turned image light OUT1.
In this embodiment, the steering structure is disposed on a propagation path of the initial image light emitted from the light engine 100, and the steering structure is used to steer the initial image light, so as to obtain the steered image light OUT1. The utility model changes the propagation direction of the initial image light by using the turning structure arranged on the propagation light path of the initial image light, so that the initial image light is turned to the required position direction, and the problem of different image directions caused by different placement positions of the light engine 100 in different structures is solved.
In an embodiment, the steering structure is a steering prism group, the steering prism group includes at least 3 steering prisms with the same structure, the 3 steering prisms are separately or integrally arranged, and each steering prism is provided with an entrance pupil plane, a reflection plane and an exit pupil plane.
In this embodiment, the initial image light emitted from the light engine 100 is turned by a turning prism group formed by at least 3 turning prisms with the same structure, and the initial image light is turned by each of an entrance pupil plane, a reflection plane and an exit pupil plane disposed on the turning prism, so as to obtain the turned image light OUT1.
When the steering prism group is in split arrangement, the position of the steering prism group can be fixed by adding the fixing glue between the steering prisms, and preferably, the fixing glue is added on the side edge of the steering prism, so that the influence on the light path part of the steering prism group can be avoided. Of course, in other application scenarios, the contact surfaces between the steering prisms can be adhered and fixed together by directly using the fixing glue with the same refractive index as the steering prisms.
In one embodiment, the 3 steering prisms are a first steering prism 10, a second steering prism 20 and a third steering prism 30, respectively;
as shown in connection with fig. 2, the first turning prism 10 includes a first entrance pupil plane 110, a first reflection plane 120, and a first exit pupil plane 130 that are in the same optical path; the second turning prism 20 includes a second entrance pupil plane, a second reflection plane, and a second exit pupil plane on the same optical path; the third turning prism 30 includes a third entrance pupil plane, a third reflection plane, and a third exit pupil plane on the same optical path;
the first entrance pupil plane is arranged in front of the exit pupil position of the light engine 100, and the first reflection plane 120 reflects the initial image light for the first time and emits the initial image light from the first exit pupil plane 130; the second entrance pupil plane is stacked on the first exit pupil plane 130, and the second reflection plane reflects the initial image light for the second time and exits from the second exit pupil plane; the third entrance pupil plane is stacked on the second exit pupil plane, and the third reflection surface performs third reflection on the initial image light and exits from the third exit pupil plane.
Further, the orientation of the third exit pupil plane coincides with the exit pupil orientation of the light engine 100.
In this embodiment, the light engine 100 emits the initial image light, after passing through the first entrance pupil plane 110, the initial image light is reflected for the first time by the first reflection plane 120 and then enters the second entrance pupil plane of the second turning prism 20, then the initial image light enters the third entrance pupil plane of the third turning prism 30 after being reflected for the second time by the second reflection plane located in the same optical path, and then the initial image light emitted by the light engine 100 is reflected for the third time by the third reflection plane located in the same optical path.
As shown in fig. 3, the first entrance pupil surface 110 in the first turning prism 10 is opposite to the exit pupil position of the light engine 100, the initial image light emitted by the light engine 100 passes through the first reflection surface 120 of the first turning prism 10 and is reflected for the first time, and is emitted by the first exit pupil surface 130, then the initial image light reaches the second reflection surface of the second turning prism 20 along the optical path to be reflected for the second time, and is emitted by the second exit pupil surface, then reaches the third reflection surface of the third turning prism 30 to complete the third reflection, the lifting of the optical path is completed in the third reflection, and finally is emitted by the third exit pupil surface, so that the image of the initial image light emitted by the third turning prism OUT1 changes with the image of the initial image light emitted by the first light engine 100, and the change of the initial image light direction is completed. And since the orientation of the third exit pupil plane coincides with the exit pupil orientation of the light engine 100, the orientation of the diverted image light OUT1 that is finally emitted by the third exit pupil plane also coincides with the light engine 100. Of course, in other embodiments, the direction of the initial image light emitted from the exit pupil plane may be adjusted by changing the angle of the reflecting surface according to the actual application requirement, or the mutual positional relationship between the turning prisms may be adjusted, so that the angle of the initial image light emitted from the light engine is not limited to be consistent with the direction of the initial image light emitted from the light engine 100.
In a specific application scenario, the light engine 100 may output the horizontal screen image light (i.e. the initial image light), and then emit the vertical screen image light (i.e. the diverted image light OUT 1) through the diverting structure, or the vertical screen image light (i.e. the initial image light) is converted into the horizontal screen image light (i.e. the diverted image light OUT 1) through the diverting structure, i.e. the picture of the initial image light is changed by 90 °. In addition, the picture angle change of the initial image light is not limited to 90 degrees, and the angle of the reflecting surface of each steering prism in the steering structure can be changed according to actual requirements.
Here, as shown in fig. 1, a position relationship diagram of each turning prism in the turning prism group when the light engine 100 is placed horizontally is provided, where the first reflecting surface in the first turning prism 10 forms an angle of 45 ° with both the XZ plane and the YZ plane, the first exit pupil surface 130 faces in the negative X-axis direction, the second exit pupil surface in the second turning prism 20 faces in the positive Z-axis direction, the third exit pupil surface in the third turning prism 30 faces in the positive Y-axis direction, and the final horizontal screen image light (i.e., the initial image light) is output as vertical screen image light (i.e., the turning image light OUT 1) after passing through the turning structure.
In a specific application scenario, as shown in fig. 4, another position relationship diagram of each turning prism in the turning prism group when the light engine 100 is placed horizontally is provided, the first exit pupil surface of the first turning prism 10 faces the positive direction of the Z axis in the coordinate axis, the second turning prism 20 is stacked on the first exit pupil surface 130, the second exit pupil surface of the second turning prism 20 faces the negative direction of the X axis, the third turning prism 30 is stacked on the second exit pupil surface, the third exit pupil surface of the third turning prism 30 faces the positive direction of the Y axis, that is, the direction of the finally outgoing turning image light OUT1 of the turning structure is the positive direction of the Y axis, and the horizontal screen image light (that is, the initial image light) is output as the vertical screen image light (that is, the turning image light OUT 1) after passing through the turning structure.
In another specific application scenario, as shown in fig. 5, a position relationship diagram of each turning prism in the turning prism group when the light engine 100 is placed vertically is provided, the first exit pupil surface 130 of the first turning prism 10 faces the negative direction of the Y axis in the coordinate axis, the second exit pupil surface of the second turning prism 20 faces the positive direction of the Z axis, the third exit pupil surface of the third turning prism 30 faces the positive direction of the X axis, that is, the direction of the finally emitted turning image light OUT1 of the turning structure is the positive direction of the X axis, and the vertical screen image light (that is, the initial image light) is output as the horizontal screen image light (that is, the turning image light OUT 1) after passing through the turning structure.
As shown in fig. 6, another positional relationship diagram of each turning prism in the turning prism group when the light engine 100 is placed vertically is provided, wherein the first exit pupil plane 130 in the first turning prism 10 faces the positive Z-axis direction, the second exit pupil plane in the second turning prism 20 faces the negative Y-axis direction, the third exit pupil plane in the third turning prism 30 faces the positive X-axis direction, that is, the direction of the finally emitted turning image light OUT1 of the turning structure is the positive X-axis direction, and the vertical screen image light (that is, the initial image light) is output as the horizontal screen image light (that is, the turning image light OUT 1) after passing through the turning structure.
In an embodiment, the steering prism is made of glass or resin, and the reflection surface of the steering prism is plated with a reflection enhancing film.
In this embodiment, the steering prism is made of glass or resin, and may be selected according to different requirements for light transmittance, weight, visual permeability, etc., and in a specific application scenario, the steering prism is not limited to glass or resin. And the reflection surface of the steering prism is plated with a reflection enhancing film, and the reflection enhancing film has the function of increasing interface reflection between media, reducing the loss of initial image light and improving the reflectivity.
In one embodiment, the turning prism is arranged to absorb light in other surfaces than the entrance pupil surface, the exit pupil surface and the reflecting surface.
In this embodiment, the other surfaces of the turning prism except the entrance pupil surface, the exit pupil surface and the reflection surface are side surfaces of the turning prism, and the light absorption setting is performed on the side surfaces, specifically, the side surfaces are coated with light absorption ink, so that the reflection and divergence of the initial image light can be reduced through the light absorption setting, and the imaging definition of the turning image light is improved 。
In a specific embodiment, the steering prism is an isosceles right triangular prism, two rectangular surfaces in the isosceles right triangular prism, which are arranged at right angles, are an entrance pupil surface and an exit pupil surface, respectively, and the other rectangular surface is a reflecting surface.
In this embodiment, the steering prism is an isosceles right triangular prism, and includes three rectangular surfaces and two triangular surfaces, where the two rectangular surfaces arranged at right angles are an entrance pupil surface and an exit pupil surface, respectively, for emitting and entering image light, and the other rectangular surface is a reflective surface, for completing reflection of the initial image light at a certain angle.
In an embodiment, the steering structure is a mirror group, and the mirror group includes at least one mirror.
In this embodiment, the turning structure may be a mirror group including at least one mirror, and reflects the initial image light emitted from the light engine 100 by the mirror, where the initial image light propagates in air, and reflects the initial image light to other directions according to a designed optical path by a mirror with a preset angle. For example, a mirror may be disposed in the initial image light emitting direction of the light engine 100, through which the initial image light is reflected into the diverted image light OUT1, and further, in order to enable the diverted image light OUT1 to be accurately incident on the optical waveguide 200, the angle of the mirror may be adjusted in advance, and/or the number of mirrors may be adjusted.
In an embodiment, the steering structure is disposed at the exit pupil position of the light engine 100 through a fixing structure, and the fixing structure is a clamping structure.
In this embodiment, the fixing manner between the steering structure and the light engine 100 is a clamping fixing manner, and the fixing manner is implemented by a clamping structure, and the clamping structure is disposed at the exit pupil of the light engine 100. In addition, the fixing structure may be a fixing glue added to the side of the turning prism, that is, the light engine 100 is adhered to the turning structure by using the fixing glue.
The embodiment of the utility model also provides AR equipment, which comprises the light engine image steering structure, and can realize the effects of the embodiment.
As shown in fig. 7 and 8, fig. 7 is a schematic diagram of an application of an image turning structure of a light engine provided in an embodiment of the present utility model to a single-optical-machine binocular AR device, where the single-optical-machine binocular refers to that the waveguide board is a binocular waveguide board, one light engine may correspond to two exit pupil areas in the binocular waveguide board, where the light engine 100 with the turning structure is horizontally disposed on the single-optical-machine binocular AR device, the light engine 100 outputs a transverse screen image light (i.e. the initial image light), three reflections are performed by the turning structure to change the direction of the initial image light, and a vertical screen image (i.e. the turning image light OUT 1) is emitted through a third exit pupil plane, then the vertical screen image light enters the optical waveguide 200 along an optical path, and the waveguide light OUT2 is output by the optical waveguide 200, where the role of the optical waveguide 200 in the AR device is responsible for transferring the turning image light and transmitting the turning image light to human eyes.
Fig. 8 is a schematic diagram of an optical engine image turning structure applied to a bi-optical machine binocular AR device according to an embodiment of the present utility model, where an optical engine 100 and another optical engine (for clarity of description, the optical engine mark 101 is used herein) output a vertical screen image light (i.e. the initial image light), and the turning structure performs three reflections to change the direction of the image light, and finally, the optical waveguide 200 (corresponding to the optical engine 100) and the optical waveguide 201 (corresponding to the optical engine 101) output waveguide light OUT2. In this embodiment, compared with the manner of placing the light engine 100 (or 101) horizontally, the manner of placing the light engine 100 (or 101) vertically can make the temples in the whole structure of the AR device thinner, more in line with the structure of the human body, and can improve the wearing experience of the AR device.
In a specific embodiment, different placement modes can be selected to place the light engine 100 and the steering structure according to the actual requirements of the AR device on the image emitting direction, and meanwhile, the included angle between the reflecting surface of the steering prism and each coordinate axis can be changed to achieve the required emitting angle requirement of the steering image light.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (9)
1. A light engine image steering structure, comprising:
the light engine is used for emitting initial image light;
a turning structure disposed on a propagation light path of the initial image light, the turning structure including a reflection surface for turning the initial image light into a turned image light;
the steering structure is a steering prism group, the steering prism group comprises at least 3 steering prisms with the same structure, the 3 steering prisms are arranged in a split mode or an integrated mode, and each steering prism is provided with an entrance pupil surface, a reflection surface and an exit pupil surface;
when the initial image light emitted by the light engine is horizontal screen image light, the steering image light emitted by the steering structure is vertical screen image light;
when the initial image light emitted by the light engine is vertical screen image light, the steering image light emitted by the steering structure is horizontal screen image light.
2. A light engine image steering arrangement according to claim 1, wherein the 3 steering prisms are a first steering prism, a second steering prism and a third steering prism, respectively;
the first steering prism comprises a first entrance pupil surface, a first reflecting surface and a first exit pupil surface which are positioned on the same optical path; the second turning prism comprises a second entrance pupil surface, a second reflecting surface and a second exit pupil surface which are positioned on the same optical path; the third turning prism comprises a third entrance pupil plane, a third reflection plane and a third exit pupil plane which are positioned on the same optical path;
the first entrance pupil plane is arranged opposite to the exit pupil position of the light engine, and the first reflection plane reflects the image light for the first time and exits from the first exit pupil plane; the second entrance pupil plane is stacked on the first exit pupil plane, and the second reflection plane reflects the image light for the second time and exits from the second exit pupil plane; the third entrance pupil plane is stacked on the second exit pupil plane, and the third reflection plane performs third reflection on the image light and exits from the third exit pupil plane.
3. A light engine image turning structure as recited in claim 2, wherein said third exit pupil plane is oriented to coincide with an exit pupil orientation of said light engine.
4. The light engine image steering structure according to claim 1, wherein the steering prism is made of glass or resin, and the reflection surface of the steering prism is coated with a reflection enhancing film.
5. A light engine image turning structure as recited in claim 1, wherein said turning prism is light absorbing in planes other than an entrance pupil plane, an exit pupil plane and a reflecting plane.
6. The light engine image steering structure according to claim 1, wherein the steering prism is an isosceles right triangular prism, two rectangular surfaces arranged at right angles in the isosceles right triangular prism are an entrance pupil surface and an exit pupil surface, respectively, and the other rectangular surface is a reflecting surface.
7. A light engine image turning structure as recited in claim 1, wherein said turning structure is a mirror assembly comprising at least one mirror.
8. The light engine image steering structure of claim 1, wherein the steering structure is disposed at an exit pupil position of the light engine by a fixing structure, and the fixing structure is a detent structure.
9. An AR device comprising a light engine image steering structure as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320170142.7U CN218995801U (en) | 2023-02-09 | 2023-02-09 | Light engine image turns to structure and AR equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320170142.7U CN218995801U (en) | 2023-02-09 | 2023-02-09 | Light engine image turns to structure and AR equipment |
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| CN218995801U true CN218995801U (en) | 2023-05-09 |
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| CN202320170142.7U Active CN218995801U (en) | 2023-02-09 | 2023-02-09 | Light engine image turns to structure and AR equipment |
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