CN217085427U - Double-screen display optical device and head-mounted display equipment - Google Patents
Double-screen display optical device and head-mounted display equipment Download PDFInfo
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- CN217085427U CN217085427U CN202220919920.3U CN202220919920U CN217085427U CN 217085427 U CN217085427 U CN 217085427U CN 202220919920 U CN202220919920 U CN 202220919920U CN 217085427 U CN217085427 U CN 217085427U
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Abstract
The utility model relates to a wear display device technical field, especially, relate to a two screen display optical device and be furnished with this optical device's wear display device. The double-screen display optical device comprises an optical assembly, a first display screen arranged above the optical assembly and a second display screen arranged in front of the optical assembly, wherein the optical assembly comprises a first lens group, a second lens group and a waveguide lens group which are sequentially arranged from front to back, and image light of the first display screen enters human eyes after being reflected and/or refracted by the waveguide lens group and the second lens group; and the image light of the second display screen enters human eyes after being reflected and/or refracted by the first lens group, the second lens group and the waveguide lens group. The utility model discloses a set up two display screens, present different images in the people's eye through optical assembly respectively to through the configuration to optical assembly, the image effect of different depth of field can be realized to the adjustment focus that forms images.
Description
Technical Field
The utility model relates to a wear display device technical field, especially, relate to a two screen display optical device and be furnished with this optical device's wear display device.
Background
In the field of virtual reality, head-mounted display devices such as VR glasses and AR glasses are necessary components. The head-mounted display device projects an image on a small display screen onto the retina of human eyes through a set of optical components, and presents an effect of viewing a large-screen image. The existing head-mounted display device mostly adopts a display screen, a user can only see an image of one depth of field, the resolutions of the center and the edge of the field of view are completely the same, and in fact, the large-view head display needs the resolution of the center to be very high, and the edge needs only low resolution.
At present, to the problem of single depth of field of images of a head-mounted display device, patent document (CN209417426U) discloses a pair of VR glasses with adjustable focus on independent display screens, which can achieve the purpose of independent focus adjustment for left and right eye images by separately setting an eyepiece and a display screen with adjustable focus corresponding to the left and right eyes. However, this method cannot solve the problem of multiple depths of field, and the angles of view of the two display screens are the same, so that the effect of fusion and superposition of images with multiple angles of view cannot be achieved, and the problem of different resolution requirements of the central area and the edge area of the large angle of view cannot be solved.
Disclosure of Invention
In order to solve the above problem, the utility model provides a two-screen display optical device through setting up two big little display screens, realizes multiple angle of vision image fusion superimposed effect, can demonstrate the image of a plurality of depth of field simultaneously.
A double-screen display optical device comprises an optical assembly, a first display screen arranged above the optical assembly and a second display screen arranged in front of the optical assembly, wherein the optical assembly comprises a first lens group, a second lens group and a waveguide lens group which are sequentially arranged from front to back, and image light of the first display screen enters human eyes after being reflected and/or refracted by the waveguide lens group and the second lens group; and the image light of the second display screen enters human eyes after being reflected and/or refracted by the first lens group, the second lens group and the waveguide lens group. The utility model discloses a set up two display screens in optical assembly the place ahead and top to select suitable optical assembly, ensure that the image of two display screens gets into people's eye after reflection and refraction, form the image of enlargeing in people's eye, thereby can realize the fusion stack of two images.
The selection of the first display screen and the second display screen can be the same resolution or different resolutions, can be the same or different visual angles, and can also be the same or different optical axes, and virtual images formed in human eyes can be avoided or not avoided, but content matching is always needed for splicing. Namely, after the images of the first display screen and the second display screen are reflected and/or refracted by the optical assembly, the images are superposed at the positions of human eyes, the display contents are matched with each other, and the display pictures are positioned on the same plane or different planes.
Further, the first lens group comprises a first lens and a first partial reflector, the first lens is an arc-shaped lens with uniform thickness, the first lens comprises a convex surface and a concave surface, the convex surface is close to the second display screen, the concave surface is close to the second lens group, and the first partial reflector is arranged on the concave surface of the first lens. The second lens group comprises a second lens and a second partial reflector, the second lens is an arc-shaped lens with uniform thickness, the second lens comprises a convex surface and a concave surface, the convex surface is close to the first lens group, the concave surface is close to the waveguide lens group, and the second partial reflector is arranged on the convex surface of the second lens. The first lens and the second lens are set to be uniform in thickness, and image light rays cannot be distorted during perspective. Meanwhile, the requirements of transmission and reflection amplification imaging of light rays in different directions can be met by combining the concave reflecting surface and the convex reflecting surface and arranging the partial reflector.
The waveguide lens group comprises a waveguide prism, a waveguide compensation mirror and a third partial reflector, the waveguide prism is close to the first display screen, the waveguide compensation mirror is located below the waveguide prism and attached to the waveguide prism along an inclined plane to form a uniform-thickness optical lens, and the third partial reflector is arranged between the waveguide prism and the waveguide compensator. The function of waveguide prism realizes the multiple reflection of light in the prism, the utility model discloses a stop the reflection of light in prism inside, make light jet out from the prism to the next light lens of directive has pasted partial reflector on the waveguide prism trailing flank. Meanwhile, the uniform thickness of the lens is realized by arranging the waveguide compensation mirror, and the vision is not distorted.
The first, second and third partial reflectors partially transmit and partially reflect light, and are semi-transparent and semi-reflective films or reflective polarizing films.
If the requirements of high resolution of a central small field angle and low resolution of a peripheral large field angle are to be met, the image display area of the first display screen can be set to be smaller than that of the second display screen, and the resolution of the first display screen is larger than that of the second display screen. Therefore, the differential display effect of different definitions of the double screens under the same focal length can be realized.
The utility model discloses except can realizing the stack of the same depth of field, different resolution ratio, not equidimension image, can also show the image (two screen image show around promptly) of different depth of field, this kind can be realized through setting up two display screens through the focus difference of optical assembly formation of image. Specifically, the following two schemes can be adopted:
1. the second lens group can move back and forth and is used for adjusting the imaging positions of the images of the first display screen and the second display screen on human eyes after passing through the optical assembly, so that the display effect that the images of the first display screen and the second display screen are in the same focal plane or have larger depth-of-field contrast at the human eyes is achieved.
2. The first display screen is movable, and when the first display screen is moved, the imaging focal length of the first display screen at the human eyes through the optical assembly is changed.
Further, the first lens group further comprises a first 1/4 glass sheet arranged behind the first lens, and/or the second lens group further comprises a second 1/4 glass sheet arranged behind the second lens. 1/4 the glass slide is used to correct the distortion of the light rays of the mirror plate and prevent the distortion of the image, which is a ghost image when 1/4 glass slide is not used.
The utility model discloses except that the image for first display screen and second display screen provides the light path, still can provide the light path for external environment optics. Namely, the second display screen is a rotary scanning screen, and external environment light can penetrate through the display screen and the optical assembly to enter human eyes, so that the images of the second display screen and the external environment are displayed simultaneously.
A head-mounted display device is provided with the double-screen display optical device.
The utility model has the advantages that:
1. the utility model discloses a set up two display screens, present different images in the people's eye through optical assembly respectively to through the configuration to optical assembly, the image effect of different depth of field can be realized to the adjustment focus that forms images.
2. The utility model discloses can be through setting up the angle of vision and the resolution ratio that two display screens are different, realize the requirement of big angle of vision center high resolution, marginal zone low resolution.
Drawings
FIG. 1 is a schematic view of the optical structure of example 1;
FIG. 2 is a schematic view of the optical structure of example 2;
FIG. 3 is a schematic view of an image forming effect of embodiment 3;
FIG. 4 is a schematic view of another imaging effect of embodiment 3;
FIG. 5 is a schematic view of an image forming effect of embodiment 4;
FIG. 6 is a schematic view of the optical structure of example 5;
FIG. 7 is a schematic view of a rotary scanning screen in example 5.
In the figure, 1, a second display screen, 2, a first lens, 3, a second lens, 4, a waveguide prism, 5, a first display screen, 6, a first partial reflector, 7, a second partial reflector, 8, a waveguide compensation mirror, 9, a human eye, 10, a third partial reflector, 11, 1/4 glass slides.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings and examples.
Example 1
A dual-screen display optical device is shown in figure 1 and comprises an optical assembly, a first display screen 5 and a second display screen 1, wherein the optical assembly comprises a first lens group, a second lens group and a waveguide lens group. The first lens group is positioned at the foremost side and comprises a first lens 2 and a first partial reflector 6, the first lens 2 is an arc-shaped lens with uniform thickness and comprises a convex surface and a concave surface, the convex surface is close to the first display screen, the concave surface is close to the second lens group, and the first partial reflector 6 adopts a semi-transparent semi-reflective film or a reflective polarizing film and is attached/plated on the concave surface to form a concave reflecting surface for amplifying an image. The second lens group is arranged in the middle and comprises a second lens 3 and a second partial reflector 7, the second lens 3 is an arc-shaped lens with uniform thickness and comprises a convex surface and a concave surface, wherein the convex surface is close to the first lens group, the concave surface is close to the waveguide lens group, the second partial reflector 7 adopts a semi-transparent semi-reflective film or a reflective polarizing film, and is attached/plated on the convex surface to form a convex reflecting surface for reducing an image. The waveguide lens group is positioned on the rear side and comprises a waveguide prism 4 and a waveguide compensation mirror 8, the section of the waveguide prism 4 is triangular, the front side face is vertically arranged, the top face and the rear side face are obliquely arranged, and waveguide films are attached to the front side face and the top face of the waveguide prism 4 and used for reflecting light rays. The waveguide compensation mirror 8 is provided with an inclined plane with the same angle with the back side of the waveguide prism, the front side and the back side are vertically arranged in parallel, the waveguide compensation mirror 8 is positioned below the waveguide prism 4, a third partial reflector 10 is arranged on the interface of the waveguide prism and the back side, the third partial reflector 10 can be a semi-transparent semi-reflective film or a reflective polarizing film, and the waveguide prism and the waveguide compensation mirror are glued together after being pasted with films to form a lens with uniform thickness. The light transmitted in the waveguide prism is reflected out of the waveguide prism by the semi-transparent semi-reflective film at the interface and is emitted to the second lens.
The first display screen 5 is positioned above the waveguide prism 4, and the placement direction is parallel to the top surface of the waveguide prism. The second display screen 1 is positioned in front of the first lens group and is arranged in parallel with the waveguide prism group. The double-screen display device is installed on the head-mounted display equipment for application.
The transmission path of the first display screen light is as follows: the image light of the first display screen enters the waveguide prism, is reflected in the waveguide prism for one or more times and then strikes a partial reflector at the rear side of the waveguide prism, and partial light is reflected and penetrates out of the waveguide prism, strikes a partial reflector of the second lens, is amplified by reflection of the concave surface of the second lens, passes through the waveguide prism and the waveguide compensation lens, and then enters human eyes.
The transmission path of the light of the second display screen is as follows: the image light of the second display screen passes through the first lens, reaches the second lens, reaches the concave surface of the first lens after being reflected by the convex surface of the front side, and enters human eyes after passing through the second lens, the waveguide prism and the waveguide compensating mirror in sequence after being reflected and amplified again.
Example 2
A double-screen display optical device is disclosed, as shown in figure 2, an 1/4 slide glass 11 is respectively arranged behind a first lens 2 and a second lens 3, so that the light of the lenses can be corrected and the image distortion can be prevented.
Example 3
In this embodiment, on the basis of embodiment 2, the optical assembly and the positions of the first display screen and the second display screen are configured, so that the focal lengths of the two display screens imaged in human eyes are the same or similar, and the two display screens image in the same plane, as shown in fig. 3 and 4. Fig. 3 is an imaging effect of setting the image areas of two display screens to be equal. Fig. 4 is an imaging effect of setting the image areas of two display screens to be unequal. For example, the first display screen viewing angle is set to 40-60 degrees, the second display screen viewing angle is set to 60 degrees or more, and the first display screen has a high resolution and the second display screen has a low resolution. Therefore, the second display screen can play large-screen pictures (suitable for displaying image pictures) with low requirements on definition, the first display screen can play small-screen pictures (suitable for displaying characters) with high requirements on definition, and the requirements of high resolution of a central small field angle and low resolution of a peripheral large field angle can be met. By adopting the scheme, the requirement of different resolutions of the images and the characters can be met by a double-screen display mode, and the images and the characters can be displayed in a superposition manner. The small screen may be in the middle of the large screen (as shown in fig. 4) or in the edge of the large screen.
Example 4
In this embodiment, on the basis of embodiment 2, some components are arranged to be movable, so that the focal lengths of the first display screen and the second display screen can be adjusted, and imaging effects of different planes can be realized (as shown in fig. 5). Specifically, the first display screen may be configured to move up and down, or the second lens group may be configured to move back and forth. When the first display screen moves upwards or downwards, the light path of the light of the first display screen is lengthened or shortened, and the imaging focal length is enlarged or shortened, so that the imaging focal length is different from that of the second display screen, and the imaging effects of tandem are achieved. When the second lens group moves forwards or backwards, the light paths of the image light rays of the first display screen and the second display screen are simultaneously influenced, one is lengthened, the other is shortened, and then the respective focal length is adjusted. When the eye attention is focused on the display content of the front screen, the display content of the front screen is clearly imaged in eyes, and the display content of the rear screen is blurred at the moment; when the eye attention is focused on the display content of the rear screen, the display content of the front screen is blurred, and the display content of the rear screen is clearly displayed. The scheme is suitable for relevant game application or image display effect.
Example 5
On embodiment 2's basis, set up the second display screen into rotatory scanning screen (like fig. 6, 7), rotatory scanning screen rotation in-process can show the image, supplies optical component formation of image, also can see the outside environment light, sees the outside scene, and this kind of double screen display device is fit for installing on AR glasses, reaches mixed reality effect.
Claims (12)
1. A dual-screen display optical device comprising an optical assembly, characterized in that: the display screen also comprises a first display screen arranged above the optical component and a second display screen arranged in front of the optical component, wherein the optical component comprises a first lens group, a second lens group and a waveguide lens group which are sequentially arranged from front to back, and image light of the first display screen enters human eyes after being reflected and/or refracted by the waveguide lens group and the second lens group; and the image light of the second display screen enters human eyes after being reflected and/or refracted by the first lens group, the second lens group and the waveguide lens group.
2. The dual screen display optical apparatus of claim 1, wherein: after the images of the first display screen and the second display screen are reflected and/or refracted by the optical assembly, the images are superposed at the positions of human eyes, the display contents are matched with each other, and the display pictures are positioned on the same plane or different planes.
3. The dual screen display optical apparatus of claim 1, wherein: the first lens group comprises a first lens and a first partial reflector, the first lens is an arc-shaped lens with uniform thickness, the first lens comprises a convex surface and a concave surface, the convex surface is close to the second display screen, the concave surface is close to the second lens group, and the first partial reflector is arranged on the concave surface of the first lens.
4. The dual screen display optical apparatus of claim 3, wherein: the second lens group comprises a second lens and a second partial reflector, the second lens is an arc-shaped lens with uniform thickness, the second lens comprises a convex surface and a concave surface, the convex surface is close to the first lens group, the concave surface is close to the waveguide lens group, and the second partial reflector is arranged on the convex surface of the second lens.
5. The dual-screen display optical device according to claim 4, wherein: the waveguide lens group comprises a waveguide prism, a waveguide compensation mirror and a third partial reflector, the waveguide prism is close to the first display screen, the waveguide compensation mirror is located below the waveguide prism and is attached to the waveguide prism along an inclined plane to form an optical lens with uniform thickness, and the third partial reflector is arranged between the waveguide prism and the waveguide compensator.
6. The dual screen display optical apparatus of claim 3, 4 or 5, wherein: the first, second and third partial reflectors partially transmit and partially reflect light, and are semi-transparent and semi-reflective films or reflective polarizing films.
7. The dual screen display optical apparatus according to any one of claims 1 or 2, wherein: the image display area of the first display screen is smaller than that of the second display screen, and the resolution of the first display screen is larger than that of the second display screen.
8. The dual screen display optical apparatus according to claim 1 or 2, wherein: the second lens group can move back and forth and is used for adjusting the imaging positions of the images of the first display screen and the second display screen on human eyes after passing through the optical assembly, so that the display effect that the images of the first display screen and the second display screen are in the same focal plane or have larger depth-of-field contrast at the human eyes is achieved.
9. The dual screen display optical apparatus according to claim 1 or 2, wherein: the first display screen is movable, and when the first display screen is moved, the imaging focal length of the first display screen at the human eyes through the optical assembly is changed.
10. The dual screen display optical device of claim 6, wherein: the first lens group further comprises a first 1/4 glass sheet arranged behind the first lens, and/or the second lens group further comprises a second 1/4 glass sheet arranged behind the second lens.
11. The dual screen display optical apparatus according to claim 1 or 2, wherein: the second display screen is a rotary scanning screen, and external environment light can penetrate through the display screen and the optical assembly to enter human eyes, so that images of the second display screen and images of an external environment can be displayed simultaneously.
12. A head-mounted display device, characterized in that: having a dual screen display optical device as claimed in any one of claims 1 to 11.
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| CN202220919920.3U CN217085427U (en) | 2022-04-19 | 2022-04-19 | Double-screen display optical device and head-mounted display equipment |
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| CN202220919920.3U CN217085427U (en) | 2022-04-19 | 2022-04-19 | Double-screen display optical device and head-mounted display equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115145041A (en) * | 2022-08-10 | 2022-10-04 | 南昌黑鲨科技有限公司 | Near-to-eye display system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115145041A (en) * | 2022-08-10 | 2022-10-04 | 南昌黑鲨科技有限公司 | Near-to-eye display system |
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