CN217932279U - Augmented reality optical system and head-mounted display - Google Patents

Abstract

The utility model discloses an augmented reality optical system and head-mounted display, install augmented reality display module in the main mirror holder of head-mounted display, augmented reality display module sends the image light beam by the display screen, leads to first part to penetrate partial reflection element and second part to penetrate partial reflection element downwards, assembles the formation of image through the reflection of many times, and produces the effect of augmented reality; meanwhile, the detachable diopter adjusting module is arranged on the inner side or the outer side of the main spectacle frame and comprises at least one diopter adjusting lens so as to realize diopter adjustment, further provide a clearer image for a user with ametropia, flexibly detach or replace the diopter adjusting module and greatly improve the use convenience.

Description

Augmented Reality Optical System and Head Mounted Display

technical field

The utility model relates to the technical field of augmented reality, in particular to an augmented reality optical system and a head-mounted display.

Background technique

Augmented reality (augmented reality, referred to as AR) is a technology derived from virtual reality (virtual reality, referred to as VR). Computing, adding virtual objects and information to the real space, and then presenting the combination of virtual and real information through the display.

Currently, a head-mounted display (HMD) is the most common augmented reality device. The head-mounted display is usually in the form of an eye mask or a helmet, so that the display is close to the wearer's eyes, and the virtual image output by the display is projected into the wearer's eyes, so that the virtual image can be combined with the surrounding environment to obtain Information that cannot be obtained directly in reality.

However, the optical display module of the current head-mounted display cannot adjust the diopter, which cannot meet the viewing needs of users with abnormal vision. Users with abnormal vision, especially those with refractive errors including myopia, hyperopia, presbyopia, or astigmatism, must wear vision correction glasses to correct their vision when using head-mounted displays to see the displayed screen clearly. Vision correction glasses It occupies a certain amount of space and weight, which increases the trouble for the user and makes it easy to feel uncomfortable; and there may also be structural conflicts between the vision correction glasses and the head-mounted display, and they may not be worn at the same time, which greatly affects the user experience.

Utility model content

The main purpose of the utility model is to provide an augmented reality optical system and a head-mounted display, which combines the augmented reality display module and the refraction adjustment module, and installs them on the main mirror frame and the head-mounted display respectively. The detachable sub-frame allows users with refractive errors to watch clear virtual images without having to wear vision correction glasses, so as to obtain a complete augmented reality experience.

Another object of the present utility model is to provide an augmented reality optical system and a head-mounted display. Disassembly and replacement to improve the convenience of use and reduce the cost of use.

In order to achieve the above purpose, the utility model provides an augmented reality optical system, which is applied to a head-mounted display with a main frame and a sub-frame, and the sub-frame is detachably installed on the inside or outside of the main frame , the augmented reality optical system includes an augmented reality display module and a diopter adjustment module, the augmented reality display module is installed in the main lens frame, and includes: a display screen for emitting image light beams; a first part through A partially penetrating reflective element, arranged below the display screen, receives the image beam from the display screen, and makes the image beam partially penetrate and partially reflect; and a second partially penetrating partially reflective element, adjacent to the first partially penetrating partially reflective element, The image beam reflected by the first part of the penetrating partial reflection element is received by the second part of the penetrating partial reflection element, and then reflected by the second part of the penetrating partial reflection element back to the first part of the penetrating partial reflection element and penetrates the first part of the penetrating part of the reflection element Part of the reflective element, then shoots into the human eye. The refraction adjustment module is installed in the sub-frame. The refraction adjustment module includes at least one refraction adjustment lens. The refraction adjustment lens is set corresponding to the first part of the penetrating partial reflection element or the second part of the penetrating part of the reflection element.

According to an embodiment of the present invention, the aforementioned sub-frame is mounted on the inner side of the main frame, and the diopter adjustment lens is located between the first part of the penetrating part of the reflective element and the human eye.

According to an embodiment of the present invention, the aforementioned display screen is fixed at the position of the shortest optical path of the image beam.

According to an embodiment of the present invention, the aforementioned sub-frame is mounted on the outside of the main frame, and the diopter adjustment lens is located on the side of the second part of the penetrating part of the reflective element away from the human eye.

According to an embodiment of the present invention, the aforementioned display screen can be displaced up and down to adjust the distance of the display screen relative to the first part of the penetrating part of the reflective element, so as to adjust the focal length.

According to an embodiment of the present invention, the aforesaid first part of the transmissive part of the reflective element has an inclination angle so as to bend the optical path of the image beam.

According to an embodiment of the present invention, the aforementioned first part of the penetrating part of the reflection element and the second part of the penetrating part of the reflection element are plane or curved surfaces, and their surfaces are coated or pasted with a film.

According to an embodiment of the present invention, the aforementioned diopter adjustment lens satisfies the condition of f<-0.1 meter or f>0.1 meter, where f is the focal length of the refraction adjustment lens.

According to an embodiment of the present invention, the aforementioned refraction adjustment lens is a myopia lens, a hyperopia lens, an astigmatism lens or a presbyopia lens.

According to an embodiment of the present invention, a lens is further provided between the aforementioned display screen and the first partially transmissive reflective element, so as to guide the image beam into the first partially transmissive reflective element.

In addition, the present invention also provides a head-mounted display, including the aforementioned augmented reality optical system, a main frame and a sub-frame, and the sub-frame is detachably mounted on the inside or outside of the main frame.

According to an embodiment of the present invention, the aforementioned sub-frame is magnetically adsorbed or clamped to the main frame.

The specific examples are described in detail below, when it is easier to understand the purpose, technical content, characteristics and effects of the present utility model.

Description of drawings

FIG. 1 is a cross-sectional view of a head-mounted display according to a first embodiment of the present invention.

FIG. 2 is an exploded view of the augmented reality optical system of the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a head-mounted display according to a second embodiment of the present invention.

FIG. 4 is an exploded view of the augmented reality optical system of the second embodiment of the present invention.

FIG. 5 is an exploded view of an augmented reality optical system according to a third embodiment of the present invention.

FIG. 6 is an exploded view of an augmented reality optical system according to a fourth embodiment of the present invention.

Explanation of reference numerals: 10-augmented reality optical system; 20-main mirror frame; 30-sub-frame; 40-human eye; 110-augmented reality display module; 111-display screen; 112-first part wear 113-the second part penetrates the partial reflection element; 114-coating; 115-coating; 116-lens; 120-diopter adjustment module; 121-diopter adjustment lens; 130-image beam; 140-environment beam.

Detailed ways

Embodiments of the present utility model will be further explained in conjunction with related drawings below. Wherever possible, the same reference numerals have been used in the drawings and description to refer to the same or similar components. In the drawings, the shape and thickness may be exaggerated for the sake of simplification and convenient labeling. It should be understood that elements not particularly shown in the drawings or described in the specification are forms known to those skilled in the art. Those skilled in the art can make various changes and modifications according to the content of the present utility model.

Please refer to FIG. 1 and FIG. 2 , which are respectively a cross-sectional view and an exploded view of a head-mounted display and its augmented reality optical system 10 according to a first embodiment of the present invention. The augmented reality optical system 10 of the present embodiment is arranged in a head-mounted display, the head-mounted display has a main mirror frame 20 and a sub-frame 30, and the sub-frame 30 is detachably mounted on the main frame 20. On the outside (the right side of FIG. 1 ), for example, the sub-frame 30 can be magnetically adsorbed or clamped to the main frame 20 . The augmented reality optical system 10 includes an augmented reality display module 110 and a diopter adjustment module 120, and the augmented reality display module 110 is installed in the main mirror frame 20 (left side of FIG. 1 ), and the diopter adjustment module 120 is installed in the sub-frame 30. A display screen 111 is arranged above the augmented reality display module 110 , a first part of the penetrating partial reflective element 112 is arranged below the display screen 111 , and a second part is arranged on the side of the first part of the penetrating partial reflective element 112 away from the human eye 40 penetrating partially reflective element 113 . The refraction adjustment module 120 includes a refraction adjustment lens 121 . The refraction adjustment lens 121 is disposed corresponding to the second part of the transmissive part reflective element 113 and located on the side of the second part of the transmissive part reflective element 113 away from the human eye 40 .

As shown in FIG. 2 , in the first embodiment, the display screen 111 emits an image beam 130 , which is transmitted down to the first part of the transmissive part reflective element 112 . The first part of the transmissive part reflective element 112 receives the image beam 130 and partially reflects the passed image beam 130 to the second part of the transmissive part reflective element 113 , and the rest passes through the first part of the transmissive part reflective element 112 . The second part of the transmissive partial reflective element 113 receives the image beam 130 reflected by the first part of the transmissive partial reflective element 112, and reflects part of the passed image beam 130 back to the first part of the transmissive partial reflective element 112, and the rest passes through The second part penetrates the partially reflective element 113, and the image beam 130 reflected back to the first partially penetrated partially reflective element 112 is partially reflected by the first partially penetrated partially reflective element 112, and the rest of the image beam 130 then penetrates the first partially penetrated The partially reflective element 112 is introduced into the human eye 40 . On the other hand, the ambient light beam 140 will pass through the dioptric adjustment lens 121, and after being partially reflected by the second part penetrating the partial reflection element 113, the rest of the environmental light beam 140 will pass through the second part penetrating part reflection element 113 and the first part in sequence. It penetrates the partial reflective element 112 and partly reflects to the display screen 111 through the first part of the penetrating partial reflective element 112 , and the remaining part passes through the first part of the penetrating partial reflective element 112 and is introduced into the human eye 40 . In this way, the human eye 40 can watch the virtual image from the display screen 111 superimposed on the real environment after being corrected by the refraction adjustment lens 121 .

The first part of the penetrating partial reflection element 112 and the second part of the penetrating partial reflection element 113 provided in the present invention can be flat or curved respectively, and can be formed by coating on the surface of the flat or curved substrate with functional Permanent coating or sticking film. In the first embodiment, the first part penetrates the partial reflection element 112 to form a single-sided coating 114, and the second part penetrates the partial reflection element to form a double-sided coating 115, so as to partially penetrate the image beam 130 and partially The function of reflection, and the first part of the penetrating partial reflection element 112 has an inclination angle, so that the optical path of the image beam 130 can be turned, so that the image beam 130 of the display screen 111 can be received and reflected to the second part of the penetrating partial reflection element 113 .

The refraction adjustment module 120 set in the utility model can be provided with one or more refraction adjustment lenses 121 correspondingly according to the needs of users. The light adjustment lenses 121, and other myopia degrees are the refraction adjustment lenses 121 of other corresponding degrees. In addition, the refraction adjustment lens 121 in the present invention can be a myopia lens, a hyperopia lens, an astigmatism lens or a presbyopia lens. Generally speaking, the refraction adjustment lens 121 satisfies the condition of f<−0.1 m or f>0.1 m, where f is the focal length of the refraction adjustment lens 121 .

In the first embodiment, the display screen 111 is configured to be able to move up and down to adjust the distance of the display screen 111 relative to the first part of the penetrating part of the reflective element 112, and the effect is to adjust the focal length; disassembled), users with refractive errors will not be able to see the virtual image from the display screen 111 clearly, and the external environment will also be unclear. When the sub-frame 30 is installed, the user can see the external environment clearly , but if the virtual image still looks blurry, at this time, the position of the display screen 111 can be adjusted up and down to adjust the focus, and the clarity of viewing the virtual image can be corrected.

Please refer to FIG. 3 and FIG. 4 , which are respectively a cross-sectional view and an exploded view of a head-mounted display and its augmented reality optical system 10 according to a second embodiment of the present invention. The difference from the first embodiment is that in the head-mounted display of this embodiment, the sub-frame 30 is detachably installed on the inner side of the main frame 20, so that the refraction adjustment lens 121 in the refraction adjustment module 120 It is set corresponding to the first part of the transmissive part reflective element 112 and located between the first part of the transmissive part reflective element 112 and the human eye 40 .

As shown in FIG. 4 , in the second embodiment, the display screen 111 emits an image light beam 130 , which is transmitted down to the first part of the transmissive part reflective element 112 . The first part of the transmissive part reflective element 112 receives the image beam 130 and partially reflects the passed image beam 130 to the second part of the transmissive part reflective element 113 , and the rest passes through the first part of the transmissive part reflective element 112 . The second part of the transmissive partial reflective element 113 receives the image beam 130 reflected by the first part of the transmissive partial reflective element 112, and part of the passed image beam 130 is reflected back to the first part of the transmissive partial reflective element 112, and the rest is transmitted through the partial reflective element 112. The second part penetrates the partially reflective element 113, and the image beam 130 reflected back to the first partially penetrated partially reflective element 112 is partially reflected by the first partially penetrated partially reflective element 112, and the rest of the image beam 130 then penetrates the first partially penetrated The partial reflection element 112 is introduced into the human eye 40 through the diopter adjustment lens 121 . On the other hand, after the ambient light beam 140 is partially reflected by the second part of the penetrating partial reflection element 113, the rest of the ambient light beam 140 passes through the second part of the penetrating partial reflection element 113 and the first part of the penetrating partial reflection element 112 in sequence, and Partially reflected to the display screen 111 through the first part of the penetrating part of the reflective element 112, and the rest of the part passes through the first part of the penetrating part of the reflecting element 112, and then is introduced into the human eye 40 through the diopter adjustment lens 121, so that the human eye 40 can Watch the virtual image from the display screen 111 superimposed on the real environment after being corrected by the diopter adjustment lens 121 .

In the second embodiment, the display screen 111 can be directly fixed at the position of the shortest optical path of the image beam 130, thereby shortening the distance between the display screen 111 and the first part of the penetrating partial reflection element 112, so as to reduce the size of the augmented reality optics. The size of the system 10 miniaturizes the size of the head-mounted display; when the sub-frame 30 is not installed (that is, when it is disassembled), users with refractive errors will not be able to see clearly the virtual display on the display screen 111. image, and the external environment will also be unclear. When the sub-frame 30 is installed, the refractive error of the human eye has been corrected by the refraction adjustment lens 121. All can be seen clearly. In addition, the display screen 111 can also be set to be able to move up and down to adjust the distance of the display screen 111 relative to the first part of the penetrating part of the reflective element 112; At this time, the upper and lower positions of the display screen 111 can be adjusted to help adjust the focus.

In addition, the augmented reality display module 110 in the present invention may further include a lens 116 for guiding light. As shown in Fig. 5 and Fig. 6, in the third embodiment and the fourth embodiment, a lens 116 is arranged between the display screen 111 and the first part of the transmissive part reflective element 112, and this lens 116 can be a single lens or A lens group composed of multiple lenses, the lens 116 can be a convex lens, a concave lens, or any combination of a convex lens and a concave lens, etc., and the concave-convex direction can also be changed arbitrarily. The lens 116 can guide the image beam 130 emitted by the display screen 111 into the first part of the transmissive part reflective element 112 , and cooperate with other elements to complete the imaging together.

To sum up, the augmented reality optical system and the head-mounted display provided by the present invention are mainly based on the augmented reality display module in the main mirror frame, and then through the movable and detachable sub-mirror The function of a refractive adjustment module can be optionally added to the frame, so that users with refractive errors do not need to wear vision correction glasses at the same time in addition to the head-mounted display, so that they can clearly see the images superimposed in the real environment. The virtual image from the display screen can improve the comfort and convenience of the augmented reality experience. In addition, users can easily disassemble and replace the refraction adjustment module by themselves according to different purposes and vision levels. It is easy to operate and highly flexible, and can even be shared by multiple people. Both users and ordinary users with normal eyesight can enjoy the full augmented reality experience.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the implementation scope of the present utility model. Therefore, all equivalent changes or modifications based on the features and spirit described in the claims of the utility model shall be included in the scope of the utility model.

Claims (12)

1. An augmented reality optical system is applied to a head-mounted display, and is characterized in that the head-mounted display is provided with a main lens frame and a sub lens frame, the sub lens frame is detachably arranged on the inner side or the outer side of the main lens frame, and the augmented reality optical system comprises:

an augmented reality display module mounted within the main frame and comprising:

a display screen for emitting an image beam;

a first partially-transmissive partially-reflective element disposed below the display screen for receiving the image beam from the display screen and partially transmitting and partially reflecting the image beam; and

a second partially transmitting partially reflecting element adjacent to the first partially transmitting partially reflecting element for receiving the image beam reflected by the first partially transmitting partially reflecting element, reflecting the image beam back to the first partially transmitting partially reflecting element by the second partially transmitting partially reflecting element, transmitting the image beam through the first partially transmitting partially reflecting element, and emitting the image beam into human eyes; and

a refractive adjustment module mounted within the sub-frame, the refractive adjustment module comprising at least one refractive adjustment lens disposed in correspondence with the first partially transmissive partially reflective element or the second partially transmissive partially reflective element.

2. The augmented reality optical system of claim 1, wherein the sub-frame is mounted inside the main frame, the diopter adjustment lens being positioned between the first partially transmissive partially reflective element and the human eye.

3. The augmented reality optical system of claim 2, wherein the display screen is fixed at a position of a shortest optical path of the image beam.

4. The augmented reality optical system of claim 1, wherein the sub-frame is mounted on the outside of the main frame, the diopter adjustment lens being located on the side of the second partially transmissive partially reflective element away from the human eye.

5. The augmented reality optical system of claim 1, wherein the display screen is capable of being displaced up and down to adjust a distance of the display screen relative to the first partially transmissive partially reflective element to adjust a focal length.

6. The augmented reality optical system of claim 1, wherein the first partially transmissive partially reflective element has an inclination angle to bend the optical path of the image beam.

7. The augmented reality optical system of claim 1, wherein the first partially transmissive partially reflective element and the second partially transmissive partially reflective element are flat or curved and have a surface coated with a film or a film.

8. The augmented reality optical system of claim 1, wherein the dioptric accommodation lens satisfies the condition of f < -0.1 m or f >0.1 m, f being the focal length of the dioptric accommodation lens.

9. The augmented reality optical system of claim 1, wherein the dioptric accommodation lens is a near vision lens, a far vision lens, an astigmatic lens or a presbyopic lens.

10. The augmented reality optical system of claim 1, further comprising a lens between the display screen and the first partially transmissive partially reflective element to direct the image beam into the first partially transmissive partially reflective element.

11. A head-mounted display comprising the augmented reality optical system of any one of claims 1 to 10, and the main frame and the sub-frame, wherein the sub-frame is detachably attached to the inside or outside of the main frame.

12. A head-mounted display as recited in claim 11, wherein the sub-frame is magnetically attached or held to the main frame.

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