CN110568617B - Synchronous display system based on light and display device thereof - Google Patents
Synchronous display system based on light and display device thereof Download PDFInfo
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- CN110568617B CN110568617B CN201910878745.0A CN201910878745A CN110568617B CN 110568617 B CN110568617 B CN 110568617B CN 201910878745 A CN201910878745 A CN 201910878745A CN 110568617 B CN110568617 B CN 110568617B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
Abstract
The invention provides a synchronous display system based on light, which is detachably attached to head-mounted display equipment and comprises a spectroscope and an imaging lens group, wherein the upper surface of the spectroscope is plated with a light splitting film with preset transmittance inverse ratio, reflects image light incident on the spectroscope and transmits the image light to the imaging lens group; and the imaging lens group comprises at least one magnifying imaging lens, magnifies the image light and projects the image light to a preset direction to carry out aerial imaging. The invention also provides a synchronous display device, and the synchronous display system and the synchronous display device can synchronously display the content displayed by the head-mounted display equipment to observers except the user.
Description
Technical Field
The invention belongs to the field of optical imaging, and particularly relates to a synchronous display system and a synchronous display device using the same.
Background
Since the concept of Augmented Reality (AR) has been proposed, a head-mounted display device based on an AR mode has been developed. The application scenarios of the head-mounted display device are also more and more extensive. In many situations, for example, a user sees content of interest, wanting to share with others; alternatively, the user may use the near-eye display device for the first time, and may be less skilled in the operation thereof, requiring another person to perform a guidance or demonstration operation on the user. Although the synchronous display of a non-wearer is realized by relying on the transmission of electric signals under a predetermined network, and the synchronous display is carried out by relying on another device with a power supply, an operating system, network connection conditions and a display interface, the application field and the range of the near-eye display device are limited to a certain extent, and inconvenience is brought to an operator and a director.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a synchronous display system and device based on light, which can display the display screen of the head-mounted display device to the outside and be visible to people other than the user.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a synchronous display system based on light is detachably attached to a head-mounted display device and comprises a spectroscope and an imaging lens group, wherein the upper surface of the spectroscope is plated with a light splitting film with a preset transmittance inverse ratio, reflects image light incident on the spectroscope and transmits the image light to the imaging lens group; and the imaging lens group comprises at least one magnifying imaging lens, magnifies the image light and projects the image light to a preset direction to carry out aerial imaging.
Further, the inverse transmittance ratio of the spectroscope is adjusted as required, and/or
The spectroscope is controlled by a switch.
Further, the beam splitting surface of the beam splitter is oriented to a predetermined direction of the environment side.
Further, the synchronous display system further comprises a catadioptric lens group; the deflection mirror group comprises at least one reflector and is used for deflecting the light path to a preset direction; the refractor group is positioned behind the spectroscope and in front of the imaging lens group; or behind the imaging lens group.
Further, the microdisplays of the attached head mounted display device are located between one and two focal lengths of the set of imaging lenses.
Furthermore, the spectroscope is positioned behind the micro display and forms a preset included angle with the micro display; or a total reflection of the image light incident thereon, behind a transmissive lens of the head-mounted display device.
Further, the optical axis of the imaging lens group passes through the center of the spectroscope.
Further, the included angle between the spectroscope and the microdisplay is 0< a <180d degrees, and preferably, the included angle is more than 50 degrees.
The invention also provides a synchronous display device, which comprises a synchronous display system and an attachment; the attachment comprises a socket and a connecting part; the head-mounted display equipment at one end of the connecting part is clamped and connected; the other end is fixedly connected with the bearing part.
Further, the middle part of the bearing part is cylindrical, and the bearing part rotates by taking the axis of the cylinder as an axis.
By adopting the display system and the device, the picture of the head-mounted display equipment can be imaged in the air without depending on any electric signal, and the operation and the carrying are convenient. In addition, through the matching use of the orientation of the spectroscope splitting surface and the refractor set, the display system and the device can be flexibly arranged in different directions of the head-mounted display equipment, and more convenient for an observer or a director to use.
Drawings
FIG. 1 is a diagram of a synchronous display system according to a first embodiment of the present invention;
FIG. 2 is a diagram of a synchronous display system according to a second embodiment of the present invention;
FIG. 3 and FIG. 4 are schematic diagrams of a synchronous display system according to a third embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a synchronous display device according to the present invention;
FIG. 6 is a schematic diagram of an internal structure of a receiving portion of the synchronous display device according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings.
The invention provides a light-based synchronous display system which is detachably attached to a head-mounted display device, images projected by the head-mounted display device to a user of the head-mounted display device are displayed outside a shell of the head-mounted display device through the synchronous system, and real images are generally formed at preset spatial positions, so that an observer except the user can directly and synchronously see contents displayed in the head-mounted display device at present. The synchronous display system mainly comprises: a spectroscope and an imaging lens group.
First embodiment
As shown in fig. 1, 11 is a microdisplay commonly used in a head-mounted display device, 12 is a beam splitter of the synchronization system of the present invention, 13 is an imaging lens group, and 14 is a plane where an imaging position of the imaging lens group is located, i.e., an image plane. The spectroscope 12 is a plane mirror, one surface facing the micro display 11 is an upper surface, a light splitting film with certain transmittance inverse ratio is plated on the spectroscope, the image brightness of the head-mounted display device seen by a user and an observer can be adjusted by adjusting the transmittance inverse ratio, the opening and closing of the light splitting function can be controlled by a switch or by adjusting the transmittance inverse ratio, and the switch is controlled by an electric signal or a machine.
The image light emitted from the microdisplay 11 passes through the spectroscope 12, the partial image light is split by the spectroscope 12 and transmitted to the imaging lens group 13, the light path is amplified and transmitted by the imaging lens group 13, and then aerial imaging is performed on the imaging surface 14, and an observer can directly see the image near the imaging position. The beam splitter 12 transmits another portion of the image light to the optical system of the head-mounted display device, and the other portion of the image light is transmitted to the human eye through the optical system in the head-mounted display device and imaged in front of the eye of the user of the head-mounted display device. So that the user and an external observer can synchronously watch the display content of the head-mounted display system.
In particular, the beam splitter 12 is located behind the microdisplay 11 of the head mounted display device. The spectroscope 12 and the microdisplay 11 form a predetermined included angle a, the spectroscopic surface of the spectroscope faces the environment side, the direction can be adjusted as required, and the range of the included angle a is as follows: 0< a < 180. By adjusting the orientation of the beam splitter 12 and the included angle between the beam splitter and the microdisplay 11, the position of the aerial image can be controlled, so as to avoid interference with the optical path of the head-mounted display device. In this embodiment, the splitting plane faces the side of the eye and forms an angle of 45 degrees with the microdisplay. It will be appreciated that while the splitting plane of the beam splitter 12 can also be selected to be oriented towards the front of the user, or left and right front, it is preferred that the included angle is greater than 50 degrees so that the split beam path is out of the line of sight of the user of the head mounted display device and does not interfere with its use.
The optical axis of the imaging lens group 13 passes through the center of the spectroscope 12. The imaging lens group 13 includes at least one magnifying imaging lens, and the number and surface type of the lenses in the imaging lens group are not limited as long as image light of the light splitting path can be magnified and imaged in the air. In this embodiment, as shown in fig. 1, the imaging lens assembly 13 includes a lens 131, a lens 132 and a curved mirror 133. The lens 131 is a convex lens, the lens 132 is a meniscus lens, and is curved toward the environment side, and the surface type of the curved mirror 133 is not limited, and may be a free-form surface, a spherical surface, or an aspheric surface. The magnifying imaging lens in the imaging lens group 13 is used to magnify the image light transmitted by the spectroscope, and the magnification ratio is generally not less than 10 times, so that the image light can be viewed by human eyes. The microdisplay 11 is between one focal length and two focal lengths of the imaging lens group 13, so that the optical path can be focused in the air through the imaging lens group 13, and aerial imaging is realized.
Second embodiment
Similar to the first embodiment, as shown in fig. 2, the microdisplay 21, the beam splitter 22 and the imaging lens group 23, 24 are imaging surfaces, the beam splitter 22 is a flat mirror, one surface facing the microdisplay 21 is coated with a light splitting film with a certain transmittance ratio, the brightness of the image of the head-mounted display device seen by the user and the observer can be adjusted by adjusting the transmittance ratio, and the on and off of the light splitting function can be controlled by a switch, or by adjusting the transmittance ratio, the switch can be controlled by an electric signal or a machine.
The imaging lens group 23 includes at least one magnifying imaging lens, and the number and surface type of the lenses in the imaging lens group are not limited as long as image light of the light splitting path can be magnified to form an image in the air. In the present embodiment, as shown in fig. 2, the imaging lens group 23 includes a lens 231, a lens 232 and a curved mirror 233. The lens 231 is a convex lens, the lens 232 is a meniscus lens, and is curved toward the environment side, and the surface type of the curved mirror 233 is not limited, and may be a free-form surface, a spherical surface, or an aspheric surface. The magnifying imaging lens in the imaging lens group 23 is used for magnifying the light path transmitted by the spectroscope, and the magnification ratio is generally not less than 10 times, so that the user can see the light path by human eyes.
The synchronous display system further comprises a refractor set 25; the beam splitter 22 splits a part of the received image light of the microdisplay 21 into optical paths, and the optical paths are amplified by the imaging lens group 23 and then transmitted to the refractor group 25, and the refractor group 25 refracts the optical paths to a predetermined direction to form an image on the imaging surface 24.
In the present embodiment, the direction of the beam splitter 22 is fixed, and the adjustment of the imaging position is realized by the turning mirror group 25, where the turning mirror group 25 includes at least one reflecting mirror, and the reflecting mirror is a plane mirror or a curved mirror, and in the present embodiment, is a curved mirror. The change of the imaging position in the space is realized by the refractor set 25, the orientation of the spectroscope 22 is not limited, and only the light of the micro display 21 is guided out, thereby reducing the complexity of the light path design.
Through first embodiment and second embodiment, spectroscope and the cooperation of refractor group, perhaps spectroscope exclusive use, with beam split optical path direction predetermined direction, like this, synchronous display system fix wear display device wear suitable position can, it is more convenient nimble to use. Meanwhile, the imaging surface in the embodiment of the invention is the position of the synchronous display device for imaging in the air, and in order to obtain a clearer imaging effect, an imaging bearing surface can be arranged on the imaging surface, and the imaging bearing surface can be a paperboard or other flat visible objects.
Third embodiment
In the head-mounted display device, in the process of refraction and transmission of the optical system of the head-mounted display device, part of light is lost in transmission in the process of refraction and transmission of the optical path, and in order to improve the utilization rate of the light, the spectroscope can be arranged on a lens generating light loss, namely behind the transmission lens, and the light to be lost is reflected to the optical path of an observer.
As shown in fig. 3, the micro display 31, the beam splitter 32 and the imaging lens group 33 are included, the beam splitter 32 is a flat mirror, the upper surface of the flat mirror is coated with a light splitting film with a certain transmission inverse ratio, the brightness of the image of the head-mounted display device seen by the user and the observer can be adjusted through the transmission inverse ratio, the on and off of the light splitting function can be controlled by a switch, or by adjusting the light splitting ratio, and the switch can be an electric signal or a mechanical switch. In the embodiment of the present invention, the beam splitter 32 may be selectively located inside the head-mounted display device or attached to the head-mounted display device together with the imaging lens group. The imaging lens assembly 33 has the same structure as that of the imaging lens assembly in the previous embodiment, and thus the description thereof is omitted.
The image light of the microdisplay 31 passes through the optical system of the head-mounted display device, and the optical system transmits the image light to be transmitted and lost to the beam splitter 32, and the beam splitter 32 is located behind the transmission lens, totally reflects the image light incident thereon, and then is magnified and imaged at the image plane 34 by the imaging lens group 33, and the magnification is generally not less than 10 times. The angle and orientation of the beam splitter 32 can be adjusted to reflect the image light into a predetermined direction. Preferably, in this embodiment, the beam splitter 32 forms an angle of 45 degrees with the horizontal plane, and reflects the image light incident thereon to the imaging lens group 33 to form an image in the horizontal plane direction. The synchronous display system improves the utilization rate of light by amplifying and imaging the image light.
Further, in the present embodiment, the synchronous display system may further include a turning mirror group, as shown in fig. 4, the turning mirror group 35 includes at least one reflecting mirror, the reflecting mirror is a plane mirror or a curved mirror, the turning mirror group 35 is located behind the beam splitter 32 and in front of the imaging mirror group 33; or behind the imaging optics 33 as shown in fig. 4. The deflecting mirror group 35 is used in cooperation with the spectroscope 32 to deflect the image light to a predetermined direction, and the imaging mirror group 33 amplifies, transmits and images the light path.
The invention also provides a synchronous display device, which comprises the synchronous display system and the attachment, wherein the spectroscope can be selectively arranged in the attachment or in the head-mounted display equipment according to the position of the spectroscope. As shown in fig. 5, in the present embodiment, the synchronous display system including the spectroscope is built in an attachment including a receiving portion 51 and a connecting portion 52. The synchronous display system is housed in the receiving portion 51, and as shown in fig. 6, lenses and mirrors of respective portions of the synchronous display system are engaged and fixed to the receiving portion 51.
The receiving portion 51 and the head mounted display device are fixed by a connecting portion 52. The connection portion 52 is connected to the head-mounted display device by snap-fitting. In this embodiment, as shown in fig. 5 and 6, the middle portion of the receiving portion 51 is cylindrical, one end of the receiving portion extends outward, a spectroscope is disposed inside the receiving portion, the angle of the extending portion and the cylinder is adjustable, a turning mirror is disposed inside the other end of the receiving portion and is connected to the connecting portion 52 through a rotating shaft, and the angle of the extending portion and the cylinder and the rotating connecting portion are adjusted to achieve more precise adjustment of the light transmission direction, so that the imaging position is better adjusted.
The connecting portion 52 is connected to the head-mounted display device by a snap fit, specifically, a U-shaped buckle is snapped, an inward protrusion is provided on an upper portion of the U-shaped buckle, and a length of the U-shaped buckle is adapted to a thickness of a portion of the head-mounted display device to be snapped. Elastic materials can be selected for use to the U-shaped buckle, so that the U-shaped buckle is convenient to mount and dismount.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (9)
1. A synchronous display system based on light is used for being detachably attached to a head-mounted display device and is characterized by comprising a spectroscope and an imaging lens group, wherein a light splitting film with preset transmittance inverse proportion is plated on the upper surface of the spectroscope, and a light splitting surface faces to the preset direction of an environment side, reflects image light incident on the light splitting surface and transmits the image light to the imaging lens group;
the imaging lens group comprises at least one magnifying imaging lens, magnifies and projects image light to a preset direction, and aerial imaging is carried out on an imaging surface;
the synchronous display system also comprises an imaging bearing surface arranged on the imaging surface, so that an observer can directly see the enlarged real image near the imaging position;
the imaging lens group comprises a convex lens, a meniscus lens and a curved mirror, and the meniscus lens is bent towards the environment side; the magnification of the imaging lens group is not less than 10 times.
2. A simultaneous display system according to claim 1, characterised in that the trans-refraction ratio of the beam splitter is adjusted as required, and/or
The spectroscope is controlled by a switch.
3. The simultaneous display system according to claim 2 further comprising a set of refractors;
the deflection mirror group comprises at least one reflector and is used for deflecting the light path to a preset direction;
the refractor group is positioned behind the spectroscope and in front of the imaging lens group; or the like, or, alternatively,
behind the imaging lens group.
4. The simultaneous display system according to claim 2 wherein the microdisplays of the attached head mounted display device are located between one and two focal lengths of the set of imaging mirrors.
5. The simultaneous display system according to claim 3 or 4, wherein the beam splitter is located behind the microdisplay at a predetermined angle to the microdisplay; or
A total reflection of image light incident thereon, located behind a transmissive lens of the head-mounted display device.
6. A simultaneous display system according to claim 2 or 3, wherein the optical axis of the imaging optics passes through the centre of the beam splitter.
7. A simultaneous display system according to claim 6, wherein the beam splitter is at an angle of more than 50 degrees to the microdisplay.
8. A simultaneous display device comprising the simultaneous display system of any one of claims 1 to 7 and an attachment; the attachment comprises a socket and a connecting part;
one end of the connecting part is clamped and connected with the head-mounted display equipment; the other end is connected with the bearing part through a rotating shaft.
9. The synchronous display device according to claim 8,
the middle part of the bearing part is cylindrical, one end of the bearing part, which is close to the head-mounted display device, extends outwards, a spectroscope is arranged in the bearing part, and the extending part and the cylinder form a variable included angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910878745.0A CN110568617B (en) | 2019-09-17 | 2019-09-17 | Synchronous display system based on light and display device thereof |
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| CN201910878745.0A CN110568617B (en) | 2019-09-17 | 2019-09-17 | Synchronous display system based on light and display device thereof |
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| CN110568617B true CN110568617B (en) | 2022-02-11 |
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| CN102096194B (en) * | 2010-12-24 | 2016-04-13 | 北京理工大学 | A kind of optical transmission projection type three-dimensional helmet display |
| US9921413B2 (en) * | 2015-10-02 | 2018-03-20 | Deepsee Inc. | 3D image system, method, and applications |
| TWI667495B (en) * | 2017-03-13 | 2019-08-01 | 宏達國際電子股份有限公司 | Head mounted display device, object tracking apparatus and method for tracking object thereof |
| CN207780369U (en) * | 2017-12-22 | 2018-08-28 | 潍坊歌尔电子有限公司 | Virtual reality helmet |
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