CN114839773A - Interface structure, display device and head-mounted visual equipment - Google Patents
Interface structure, display device and head-mounted visual equipment Download PDFInfo
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- CN114839773A CN114839773A CN202210787811.5A CN202210787811A CN114839773A CN 114839773 A CN114839773 A CN 114839773A CN 202210787811 A CN202210787811 A CN 202210787811A CN 114839773 A CN114839773 A CN 114839773A
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- 230000000007 visual effect Effects 0.000 title claims description 10
- 230000010287 polarization Effects 0.000 claims abstract description 154
- 238000001514 detection method Methods 0.000 claims description 20
- 230000000903 blocking effect Effects 0.000 claims description 17
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 5
- 230000001902 propagating effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 238000001914 filtration Methods 0.000 description 7
- 239000002096 quantum dot Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 210000001508 eye Anatomy 0.000 description 2
- 230000004424 eye movement Effects 0.000 description 2
- 210000005252 bulbus oculi Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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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
- G02B27/0093—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
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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
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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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
- G06F3/013—Eye tracking input arrangements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The present disclosure relates to the field of optical systems, and in particular, to an interface structure, a display device, and a head-mounted video device. Interface structure, including the interface, interface structure is still including setting up infrared transmitter, infrared receiver, first polarization selector and the second polarization selector at the interface inboard, infrared transmitter's signal emission window is equipped with the infrared light of first polarization selector in order to send first polarization direction, infrared receiver's signal reception window is equipped with the infrared light of second polarization selector in order to receive the second polarization direction, first polarization direction and second polarization direction mutually perpendicular, interface structure still includes polarization converter, the interface is equipped with polarization converter to the infrared light that will pass through the first polarization direction at interface converts the infrared light of second polarization direction into. The technical scheme can reduce the space occupied by the infrared transmitter and the infrared receiver under the condition of ensuring the correct measurement result.
Description
Technical Field
The present disclosure relates to the field of optical systems, and in particular, to an interface structure, a display device, and a head-mounted video device.
Background
A Head-Mounted visual Display (Head-Mounted Display) on which a user can wear the device for a virtual reality experience. Eyeball tracking technology is often applied to head-mounted visual equipment, and generally needs to be realized by an infrared eye movement tracker.
The infrared eye tracker mainly comprises infrared transmitter and infrared receiver two parts, and in prior art, infrared transmitter and infrared receiver can be separated set up side by side in display interface's side, need occupy the inside great size of head-mounted visual equipment.
Disclosure of Invention
To solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides an interface structure, a display device, and a head-mounted visual apparatus that can reduce the size occupied by an infrared transmitter and an infrared receiver.
In a first aspect, the present disclosure provides an interface structure, including an interface, the interface structure further includes an infrared transmitter, an infrared receiver, a first polarization selector and a second polarization selector which are arranged inside the interface, a signal transmitting window of the infrared transmitter is provided with the first polarization selector to transmit infrared light in a first polarization direction, a signal receiving window of the infrared receiver is provided with the second polarization selector to receive infrared light in a second polarization direction, the first polarization direction and the second polarization direction are perpendicular to each other, the interface structure further includes a polarization converter, and the interface is provided with the polarization converter to convert the infrared light in the first polarization direction passing through the interface into infrared light in the second polarization direction.
In a second aspect, the present disclosure provides a display device, including displaying the interface, display device still includes infrared detection unit, infrared detection unit is including setting up infrared transmitter, infrared receiver, first polarization selector, second polarization selector and the polarization converter at the display interface inboard, infrared transmitter's signal emission window is equipped with first polarization selector in order to send the infrared light of first polarization direction, infrared receiver's signal reception window is equipped with the infrared light of second polarization selector in order to receive the second polarization direction, first polarization direction and second polarization direction mutually perpendicular, display interface is equipped with the polarization converter and converts the infrared light of the first polarization direction through the display interface into the infrared light of second polarization direction.
Optionally, the infrared detection unit further includes a first blocking layer, where the first blocking layer and the first polarization selector cover the signal emission window of the infrared emitter, so that the infrared emitter emits infrared light with a first polarization direction in a specific propagation direction.
Optionally, the infrared detection unit further includes a first blocking layer, where the first blocking layer covers a periphery of the infrared receiver to prevent infrared light received by a signal window of the infrared receiver from propagating to other directions.
Optionally, the infrared detection unit further includes a filter structure, and the filter structure is disposed between the second polarization selector and the signal receiving window of the infrared receiver to filter and output the infrared light emitted by the infrared emitter to the signal receiving window of the infrared receiver.
Optionally, the filter structure comprises a grating waveguide structure.
Optionally, the infrared detector further includes a second blocking layer, and the second blocking layer covers the filtering structure, so that only infrared light passing through the second polarization selector enters the filtering structure.
Optionally, the second barrier layer includes a shielding layer made of a black organic colloid material or a total reflection metal material.
In a third aspect, the present disclosure provides a head-mounted visual device comprising the display apparatus according to any one of the second aspect.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
compared with the prior art, the technical scheme can integrate the infrared transmitter and the infrared receiver which are depended by the infrared eye movement tracking technology under the display interface under the condition of ensuring the correct measurement result, and reduce the space occupied by the infrared transmitter and the infrared receiver.
Drawings
Fig. 1 is a schematic structural diagram of an interface structure according to an embodiment of the disclosure;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the disclosure;
fig. 3 is a schematic view of the polarization direction of infrared light according to an embodiment of the disclosure.
Wherein, 1, interface; 2. an infrared emitter; 3. an infrared receiver; 4. a first polarization selector; 5. a second polarization selector; 6. a polarization converter; 7. a first barrier layer; 8. a second barrier layer; 9. a filtering structure; 10. displaying an interface; 11. the back plate is driven.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Fig. 1 is a schematic structural diagram of an interface structure according to an embodiment of the present disclosure. As shown in fig. 1, in this embodiment, the interface structure includes an interface 1, the interface structure further includes an infrared emitter 2, an infrared receiver 3, a first polarization selector 4, and a second polarization selector 5, which are disposed inside the interface 1, a signal emission window of the infrared emitter 2 is provided with the first polarization selector 4 to emit infrared light in a first polarization direction, a signal reception window of the infrared receiver 3 is provided with the second polarization selector 5 to receive infrared light in a second polarization direction, and the first polarization direction and the second polarization direction are perpendicular to each other.
In the present embodiment, the inside of the interface 1 refers to an internal space partitioned by the interface 1, which is a space with respect to an external object to be detected. The infrared emitter 2 is an infrared quantum dot laser. The infrared receiver 3 is a GaN infrared detector. The interface 1 is a lens made of glass or resin, and in some other embodiments, the interface 1 is a plane or a curved surface that can pass infrared light and reflect part of the infrared light. The first polarization selector 4 is a polarizer, and the second polarization selector 5 is a polarizer having a polarization selection direction perpendicular to the polarization selection direction of the first polarization selector 4.
Referring to fig. 3, fig. 3 is a schematic diagram of the polarization direction of infrared light according to an embodiment of the disclosure. In fig. 3, a rectangular spatial coordinate system xyz is established, the interface 1 being arranged parallel to the xy-plane.
The infrared emitter 2 can emit infrared light, and after passing through the first polarization selector 4, the infrared emitter 2 can only emit infrared light in a first polarization direction, as shown in fig. 3, a dotted line is a polarization direction of light, the first polarization direction is parallel to the y-axis, and the second polarization direction is parallel to the x-axis, so that the first polarization direction and the second polarization direction form a mutually perpendicular relationship. Since the first polarization selector 4 can only selectively transmit the infrared light with the first polarization direction, and the second polarization selector 5 can only selectively transmit the infrared light with the second polarization direction, in the embodiment of the disclosure, the first polarization direction and the second polarization direction are perpendicular to each other, so that it can be ensured that no component of the infrared light with the first polarization direction can be converted into the infrared light with the second polarization direction after the infrared light with the first polarization direction transmits through the second polarization selector 5.
If the infrared emitter 2 and the infrared receiver 3 are directly arranged on the inner side of the interface 1, after the infrared emitter 2 emits infrared light, part of the infrared light will not pass through the interface 1 but be reflected by the interface 1, and the reflected infrared light will be received by the infrared receiver 3, so that the final infrared measurement result is inaccurate.
In the technical scheme, the infrared transmitter 2 can only emit infrared light in the first polarization direction by arranging the first polarization selector 4, the infrared receiver 3 can only receive infrared light in the second polarization direction by arranging the second polarization selector 5, and the first polarization direction and the second polarization direction are perpendicular to each other, so that the infrared light in any first polarization direction is not converted into the infrared light in the second polarization direction after passing through the second polarization selector 5, the infrared light emitted by the infrared transmitter 2 is not received by the infrared receiver 3 after being reflected by the interface 1, and the final infrared measurement result can be ensured to be more accurate while the infrared transmitter 2 and the infrared receiver 3 are integrated in the inner space of the interface 1.
The interface structure further comprises a polarization converter 6, and the interface 1 is provided with the polarization converter 6 to convert the infrared light passing through the interface 1 in the first polarization direction into the infrared light in the second polarization direction. Specifically, the infrared light passing through the interface 1 in the first polarization direction is converted into infrared light in the second polarization direction by the polarization converter 6, and the infrared light in the second polarization direction is reflected by the external detector, and is received by the infrared receiver 3 after being selected by the second polarization selector 5 through the interface 1, so that the whole detection process is completed. In the present embodiment, the polarization converter 6 is a polarization rotator.
In other embodiments, the polarization converter 6 may not be disposed on the interface 1, but the polarization converter 6 is disposed on the object to be detected, and after the infrared light in the first polarization direction contacts the object to be detected, the infrared light in the second polarization direction is converted by the polarization converter 6 disposed on the object to be detected and reflected back, and is received by the infrared receiver 3 after being selected by the second polarization selector 5 through the interface 1, thereby completing the whole detection process.
Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the disclosure. As shown in fig. 2, the display device includes a display interface 10, an infrared detection unit and a driving backplane 11, the infrared detection unit includes an infrared emitter 2, an infrared receiver 3, a first polarization selector 4, a second polarization selector 5 and a polarization converter 6, which are disposed inside the display interface 10 and above the driving backplane 11, the infrared emitter 2 and the infrared receiver 3 are respectively connected to the driving backplane 11, so that the driving backplane 11 can control the infrared emitter 2 to emit infrared light and obtain an infrared signal received by the infrared receiver 3, and specifically, the infrared emitter 2 and the infrared receiver 3 are respectively connected to the driving backplane through a hybrid bonding (hybrid bonding) connection manner. The signal emission window of the infrared emitter 2 is provided with a first polarization selector 4 for emitting infrared light in a first polarization direction, the signal reception window of the infrared receiver 3 is provided with a second polarization selector 5 for receiving infrared light in a second polarization direction, the first polarization direction and the second polarization direction are perpendicular to each other, and the display interface 10 is provided with a polarization converter 6 for converting the infrared light in the first polarization direction passing through the display interface 10 into the infrared light in the second polarization direction.
The display interface 10 of the display device also has a diffraction grating to present a three-dimensional image to the outside. The display device may comprise a plurality of infrared detection units, and in a preferred embodiment, the display device comprises 1920 x 1080 infrared detection units, and the transverse length of each infrared detection unit is below 15 um.
The structure, the cooperation and the effect of the infrared emitter 2, the infrared receiver 3, the first polarization rotator, the second polarization selector 5 and the polarization converter 6 in the infrared detection unit are the same as those of the interface structure of the above embodiment.
The infrared detection unit further comprises a first blocking layer 7, and the first blocking layer 7 and the first polarization selector 4 coat the periphery of the signal emission window of the infrared emitter 2 so that the infrared emitter 2 emits infrared light with a first polarization direction along a specific propagation direction.
In the present embodiment, the first barrier layer 7 is named as DBR (distributed Bragg reflection): in the distributed bragg reflector, in this embodiment, the DBR is selected as the first blocking layer 7, and the reflected light emitted from the signal emission window of the infrared emitter 2 in other directions except for the specific direction can be reflected back, so that the infrared emitter 2 is prevented from emitting infrared light in other directions, and a blocking effect is achieved.
Similarly, the first barrier layer 7 also covers the periphery of the infrared receiver 3 to prevent the infrared light with the second polarization direction received by the infrared receiver from propagating to other directions. If the periphery of the infrared receiver 3 is not covered, the infrared light with the second polarization direction received by the infrared receiver may propagate to other directions, and may be reflected back by the display interface 10, so that the infrared receiver receives the received infrared light again, thereby causing a measurement error.
Specifically, in this embodiment, the propagation direction of the specific direction is a direction from inside the interface to outside the interface. In other embodiments, the first blocking layer 7 may also be made of a material that blocks only infrared light from propagating, such as a black organic colloid or a total reflection metal material.
The infrared detection unit further comprises a filter structure 9, wherein the filter structure 9 is arranged between the second polarization selector 5 and the signal receiving window of the infrared receiver 3, so as to specifically output the infrared light emitted by the infrared emitter 2 to the signal receiving window of the infrared receiver 3.
In this embodiment, the infrared emitter 2 is an infrared quantum dot laser, the infrared quantum dot laser can emit infrared light with a specific wavelength to the outside, in this embodiment, the filtering structure 9 is arranged between the signal receiving windows of the second polarization selector 5 and the infrared receiver 3, the filtering structure 9 can specifically select the infrared light with the specific wavelength emitted by the infrared quantum dot laser, the infrared light with the second polarization direction of other wavelengths does not pass through, it can be ensured that no clutter generated from the outside is detected by the infrared receiver 3, and the accuracy of the infrared measurement result is improved.
Specifically, in this embodiment, the filter structure 9 is a blazed grating waveguide structure that allows only light with a wavelength emitted by the infrared quantum dot laser to pass through. In this embodiment, the thickness included in the blazed grating waveguide structure only allows light with a wavelength emitted by the infrared quantum dot laser to propagate, and only light with a certain wavelength can be propagated in the waveguide by total reflection under the action of the optical waveguide, so that the blazed grating waveguide structure has a filtering function on one hand, and can couple out infrared light at any position on the other hand, so that the infrared receiver 3 can be arranged at any position. In other embodiments, the surface of the grating waveguide structure may be metallized to increase the diffraction efficiency, and the filter structure 9 may be replaced by other filter structures according to the prior art and the common general knowledge, for example, only by plating, but the infrared receiver can be disposed under the second polarization selector. Of course, other structures having optical waveguide function can be selected by those skilled in the art.
The infrared detector further comprises a second blocking layer 8, the second blocking layer 8 covering the filter structure 9, such that only infrared light passing through the second polarization selector 5 enters the filter structure 9.
Specifically, in this embodiment, the second blocking layer 8 is a shielding layer made of a black organic colloid material, so as to block infrared light that does not pass through the second polarization selector 5 in other directions from entering the filtering structure 9. In other embodiments, the shielding layer may be made of a total reflection metal material, or a combination of a total reflection metal material and a black organic colloid material.
In this embodiment, the display device may be integrated with any of the infrared detectors described in the above embodiments to achieve infrared eye tracking.
A head-mounted visual apparatus comprising the display device of any of the above embodiments.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. Interface structure, including the interface, its characterized in that, interface structure is still including setting up infrared transmitter, infrared receiver, first polarization selector and the second polarization selector at the interface inboard, infrared transmitter's signal emission window is equipped with the infrared light of first polarization selector in order to send first polarization direction, infrared receiver's signal reception window is equipped with the infrared light of second polarization selector in order to receive the second polarization direction, first polarization direction and second polarization direction mutually perpendicular, interface structure still includes polarization converter, the interface is equipped with polarization converter to the infrared light that will pass through the first polarization direction of interface converts the infrared light of second polarization direction into.
2. Display device, including showing interface, its characterized in that, display device still includes infrared detection unit, infrared detection unit is including setting up at inboard infrared transmitter, infrared receiver, first polarization selector, second polarization selector and the polarization converter of showing interface, infrared transmitter's signal emission window is equipped with first polarization selector in order to send the infrared light of first polarization direction, infrared receiver's signal reception window is equipped with the infrared light of second polarization selector in order to receive the second polarization direction, first polarization direction and second polarization direction mutually perpendicular, show interface is equipped with the polarization converter in order to convert the infrared light of the first polarization direction through showing interface into the infrared light of second polarization direction.
3. The display device according to claim 2, wherein the infrared detection unit further comprises a first blocking layer covering the signal emission window of the infrared emitter with a first polarization selector so that the infrared emitter emits infrared light of a first polarization direction of a specific propagation direction.
4. The display device according to claim 2, wherein the infrared detection unit further comprises a first blocking layer covering a periphery of the infrared receiver to prevent infrared light received by a signal window of the infrared receiver from propagating to other directions.
5. The display device according to claim 2, wherein the infrared detection unit further comprises a filter structure disposed between the second polarization selector and the signal receiving window of the infrared receiver to filter and output the infrared light emitted from the infrared emitter to the signal receiving window of the infrared receiver.
6. A display device as claimed in claim 5, characterised in that the filter structure comprises a grating waveguide structure.
7. A display device as claimed in claim 5, wherein the infrared detector further comprises a second blocking layer that encapsulates the filter structure such that only infrared light that passes through the second polarization selector enters the filter structure.
8. The display device according to claim 7, wherein the second barrier layer includes a shielding layer made of a black organic colloidal material or a total reflection metal material.
9. Head mounted visual apparatus, characterized in that the head mounted visual apparatus comprises a display device according to any of claims 2-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210787811.5A CN114839773B (en) | 2022-07-06 | 2022-07-06 | Interface structure, display device and head-mounted visual equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210787811.5A CN114839773B (en) | 2022-07-06 | 2022-07-06 | Interface structure, display device and head-mounted visual equipment |
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| CN114839773A true CN114839773A (en) | 2022-08-02 |
| CN114839773B CN114839773B (en) | 2022-09-30 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116566A (en) * | 2018-09-06 | 2019-01-01 | 北京理工大学 | A kind of nearly eye display device |
| CN109581655A (en) * | 2019-01-08 | 2019-04-05 | 北京七鑫易维信息技术有限公司 | A kind of eyeball tracking system and eyeball tracking method inhibiting lens retroreflective |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116566A (en) * | 2018-09-06 | 2019-01-01 | 北京理工大学 | A kind of nearly eye display device |
| CN109581655A (en) * | 2019-01-08 | 2019-04-05 | 北京七鑫易维信息技术有限公司 | A kind of eyeball tracking system and eyeball tracking method inhibiting lens retroreflective |
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Effective date of registration: 20230719 Address after: 518000 room 402, building 24, Lianhua second village, No. 5002, Hongli West Road, Lianhua second village community, Huafu street, Futian District, Shenzhen, Guangdong Province Patentee after: Shenzhen Aoshi Micro Technology Co.,Ltd. Address before: No.28 Huandao South Road, Guicheng Street, Nanhai District, Foshan City, Guangdong Province Patentee before: Ji Hua Laboratory |
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