CN209265082U - Virtual display device - Google Patents
Virtual display device Download PDFInfo
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- CN209265082U CN209265082U CN201920075048.7U CN201920075048U CN209265082U CN 209265082 U CN209265082 U CN 209265082U CN 201920075048 U CN201920075048 U CN 201920075048U CN 209265082 U CN209265082 U CN 209265082U
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Abstract
The utility model discloses a kind of virtual display devices, comprising: display module, the first wave plate and the second wave plate, display module emit linearly polarized light or non-polarized light for emitting imaging beam, imaging beam；The imaging beam direction of propagation is disposed with the first wave plate and the second wave plate；Imaging beam injects the first wave plate and the second wave plate；First wave plate and the second wave plate are quarter-wave plate, and quarter-wave plate has fast axle and a slow axis, the fast axle of the fast axle of the first wave plate and the second wave plate is orthogonal or the slow axis of the first wave plate and the slow axis of the second wave plate it is orthogonal.The utility model provides a kind of virtual display device, can effectively reduce the formation of ghost image.
Description
Technical field
The utility model relates to optical image technology field more particularly to a kind of virtual display devices.
Background technique
Virtual reality (Virtual Reality) abbreviation VR is a kind of simulated environment generated using computer, and used
Family is immersed to the technology in the environment, such as wearing display equipment is current VR technology prior development direction, in order to increase VR system
The visual field of system improves resolution ratio, reduces the volume of VR system, passes through polarizing film, wave plate and fractional transmission reflector plate and optics
Eyeglass forms imaging optical path, is reflected imaging optical path and is reflected, so realizes the big visual field of VR system, the mesh of small size
, but the transmission and reflection characteristic and ideal due to polarizing film and wave plate are variant, produce by the optical path of these optical elements
Raw phase difference, thus using the virtual display device ghost image easily generated of these optical elements composition, the presence of ghost image is seriously affected
Final image quality.
Utility model content
Based on this, there are problems that phase difference causes ghost image virtual display device in current VR system, it is necessary to
A kind of virtual display device is provided, the formation of ghost image can be reduced, improves image quality.
To achieve the above object, the utility model proposes virtual display device, comprising:
Display module, for emitting imaging beam, the imaging beam is non-polarized light；
The imaging beam direction of propagation of the non-polarized light is disposed with the first wave plate and the second wave plate；It is described unpolarized
The imaging beam of light is converted into linearly polarized light beam and injects first wave plate and second wave plate；
First wave plate and second wave plate are quarter-wave plate, the quarter-wave plate have fast axle and
The fast axle of slow axis, the fast axle of first wave plate and second wave plate is orthogonal or the slow axis and described of first wave plate
The slow axis of two wave plates is orthogonal；
Or
Display module, for emitting imaging beam, the imaging beam is linearly polarized light；
The imaging beam direction of propagation of the linearly polarized light is disposed with the first wave plate and the second wave plate；The linear polarization
The imaging beam of light injects first wave plate and second wave plate；
First wave plate and second wave plate are quarter-wave plate, the quarter-wave plate have fast axle and
The fast axle of slow axis, the fast axle of first wave plate and second wave plate is orthogonal or the slow axis and described of first wave plate
The slow axis of two wave plates is orthogonal.
Optionally, the virtual display device includes the part being set between first wave plate and second wave plate
Transflector structure, the virtual display device further include reflection of polarization structure, and the reflection of polarization structure setting is in described second
Wave plate deviates from first wave plate side, and the reflection of polarization structure has a transmission polarization direction, and the imaging beam passes through
Form the first linearly polarized light after second wave plate, the polarization direction of first linearly polarized light and the reflection of polarization structure
Transmission polarization direction is orthogonal, and first linearly polarized light is reflected by the reflection of polarization structure, and successively penetrates described second
The reflection of wave plate and the part transflector structure is again passed through second wave plate and forms the second linearly polarized light, and described the
The polarization direction of two linearly polarized lights is identical with the transmission polarization direction of the reflection of polarization structure.
Optionally, when the imaging beam be linearly polarized light when, then the transmission polarization direction of the reflection of polarization structure with
The polarization direction of the imaging beam is orthogonal, the fast axle or slow axis and imaging beam polarization direction angle of first wave plate
It is 45 °.
Optionally, when the imaging beam is non-polarized light, then the display module is between first wave plate
Polarization structure, the transmission polarization direction of the reflection of polarization structure and the polarization transmission side of the polarization structure are provided in optical path
To orthogonal, the fast axle or slow axis of first wave plate and the polarization of the polarization structure are 45 ° through angular separation.
Optionally, the virtual display device includes the first lens set gradually along the imaging beam direction of propagation
Group, the second lens group and the third lens group, first lens group are set to the part transflector structure to second wave
In optical path between piece, second lens group is set to second wave plate to the optical path between the reflection of polarization structure
In, the third lens group is set to the reflection of polarization structure in the optical path of second lens group side.
Optionally, the virtual display device includes the 4th lens group set gradually along the imaging beam direction of propagation
With the 5th lens group, the 4th lens group is set to the part transflector structure to the optical path between second wave plate
In, the 5th lens group is set to the 4th lens group into the optical path between second wave plate.
Optionally, the virtual display device includes the 6th lens group set gradually along the imaging beam direction of propagation
With the 7th lens group, the 6th lens group is set to the part transflector structure to the optical path between second wave plate
In, the 7th lens group is set to second wave plate into the optical path between the reflection of polarization structure.
Optionally, the virtual display device includes the 8th lens group set gradually along the imaging beam direction of propagation
With the 9th lens group, the 8th lens group is set to the part transflector structure to the optical path between second wave plate
In, the 9th lens group is set to the reflection of polarization structure in the optical path of second wave plate side.
Optionally, the virtual display device includes the tenth lens group, and it is saturating that the tenth lens group is set to the part
Catoptric arrangement is into the optical path between second wave plate.
Optionally, the virtual display device includes several lens groups, first wave plate, second wave plate, described
Part transflector structure and the reflection of polarization structure are to be set to the film layer on the lens group surface.
The utility model proposes technical solution in, display module emits imaging beam, and the imaging beam successively passes through
First wave plate and the second wave plate pass through the first wave plate of setting wherein the first wave plate and the second wave plate are quarter-wave plate
Fast axle and the fast axle of the second wave plate is orthogonal or the slow axis of the first wave plate and the slow axis of the second wave plate it is orthogonal, guarantee that virtual display is set
The phase difference of standby middle generation is cancelled out each other, and realizes zero phase difference, thus reduces the generation of ghost image.The utility model virtually shows and sets
Standby and virtual display device can reduce the formation of ghost image, improve image quality.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of an embodiment in the utility model virtual display device；
Fig. 2 is the structural schematic diagram of second embodiment in the utility model virtual display device；
Fig. 3 is the structural schematic diagram of 3rd embodiment in the utility model virtual display device；
Fig. 4 is the structural schematic diagram of fourth embodiment in the utility model virtual display device；
Fig. 5 is the structural schematic diagram of the 5th embodiment in the utility model virtual display device.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 110 | Display module | 300 | First lens group |
| 111 | Imaging beam | 310 | Second lens group |
| 112 | First linearly polarized light | 320 | The third lens group |
| 113 | Second linearly polarized light | 330 | 4th lens group |
| 120 | First wave plate | 340 | 5th lens group |
| 130 | Part transflector structure | 350 | 6th lens group |
| 140 | Second wave plate | 360 | 7th lens group |
| 150 | Reflection of polarization structure | 370 | 8th lens group |
| 160 | Polarization structure | 380 | 9th lens group |
| 200 | Emergent pupil | 390 | Tenth lens group |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and cannot manage
Solution is its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.It is " more in the description of the present invention,
It is a " it is meant that at least two, such as two, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. should do broad sense reason
Solution, for example, " fixation " may be a fixed connection, may be a detachable connection, or integral；It can be mechanical connection, it can also
To be electrical connection；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary
Or the interaction relationship of two elements, unless otherwise restricted clearly.It for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
It in addition, the technical solution between each embodiment of the utility model can be combined with each other, but must be with ability
Based on domain those of ordinary skill can be realized, it will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of this technical solution is not present, also not within the protection scope of the requires of the utility model.
Referring to Fig. 1, the utility model proposes virtual display device, comprising: display module 110,120 and of the first wave plate
Second wave plate 140.
Display module 110 is non-polarized light for emitting imaging beam 111, imaging beam 111；
111 direction of propagation of imaging beam of non-polarized light is disposed with the first wave plate 120 and the second wave plate 140；It is non-inclined
The imaging beam 111 of vibration light is converted into linearly polarized light beam and injects the first wave plate 120 and the second wave plate 140；
First wave plate 120 and the second wave plate 140 are quarter-wave plate, and quarter-wave plate has fast axle and slow axis,
The fast axle of first wave plate 120 and the fast axle of the second wave plate 140 is orthogonal or the slow axis of the first wave plate 120 and the second wave plate 140 it is slow
Axis is orthogonal；
Alternatively, display module 110 is linearly polarized light for emitting imaging beam 111, imaging beam 111；
111 direction of propagation of imaging beam of linearly polarized light is disposed with the first wave plate 120 and the second wave plate 140；Line is inclined
The imaging beam 111 of vibration light injects the first wave plate 120 and the second wave plate 140；
First wave plate 120 and the second wave plate 140 are quarter-wave plate, and quarter-wave plate has fast axle and slow axis,
The fast axle of first wave plate 120 and the fast axle of the second wave plate 140 is orthogonal or the slow axis of the first wave plate 120 and the second wave plate 140 it is slow
Axis is orthogonal.
Wherein quarter-wave plate (quarter-wave plate) be certain thickness birefringent monocrystalline thin slice or film,
When light normal incidence penetrates, the phase difference between ordinary light (o light) and non-ordinary light (e light) is equal to pi/2 or its odd-multiple, in this way
Chip or film be known as quarter-wave plate.
Display module 110 is LCD (Liquid Crystal Display) liquid crystal display or OLED (Organic
Light-Emitting Diode) the self luminous display device such as Organic Light Emitting Diode, display module 110 or LCOS
(Liquid Crystal on Silicon) reflection type liquid crystal projection display device, furthermore the second the reflected beams 113 are incident in out
200 position of pupil.
The utility model proposes technical solution in, display module 110 emit imaging beam 111, the imaging beam 111
Successively pass through the first wave plate 120 and the second wave plate 140, wherein the first wave plate 120 and the second wave plate 140 are quarter-wave
Piece, by be arranged the first wave plate 120 fast axle and the second wave plate 140 fast axle is orthogonal or the slow axis and second of the first wave plate 120
The slow axis of wave plate 140 is orthogonal, guarantees that the phase difference generated in virtual display device is cancelled out each other, that is to say, that pass through first wave
The phase difference of the phase difference of piece 120 and the second wave plate 140 subtracts each other, and realizes zero phase difference, thus reduces the generation of ghost image.This is practical
New Virtual shows equipment and virtual display device, can reduce the formation of ghost image, improves image quality.In addition, this is practical new
Type is applicable in the spectrum of different wave length, and the light of different wave length can pass through 140 phase of the first wave plate 120 and the second wave plate
Difference is cancelled out each other, and realizes that zero phase difference reduces ghost image and generates.
Further, virtual display device 111 includes the part being set between the first wave plate 120 and the second wave plate 140
Transflector structure 130, part transflector structure 130 is used for transmissive portion light beam, and reflects remainder light beam；Virtual display is set
Standby 111 further include reflection of polarization structure 150, and reflection of polarization structure 150 has a transmission polarization direction, and imaging beam 111 passes through
Form the first linearly polarized light 112 after second wave plate 140, the polarization direction of the first linearly polarized light 112 and reflection of polarization structure 150
Transmission polarization direction is orthogonal, and the first linearly polarized light 112 is reflected by reflection of polarization structure 150, and successively penetrates the second wave plate
140 and part transflector structure 130 reflection, be again passed through the second wave plate 140 formed the second linearly polarized light 113, the second line
The polarization direction of polarised light 113 is identical with the transmission polarization direction of reflection of polarization structure 150, passes through part transflector structure 130
It is convenient for catadioptric optical path with reflection of polarization structure 150, convenient for imaging display, while guarantees the second linearly polarized light 113 through polarization
Catoptric arrangement 150.
Further, when imaging beam 111 be linearly polarized light when, the transmission polarization direction of reflection of polarization structure 150 at
As the polarization direction of light beam 110 is orthogonal, the fast axle or slow axis of the first wave plate 120 are with 111 polarization direction angle of imaging beam
45 °, guarantee that imaging beam 111 is converted to circularly polarized light after the first wave plate 120.
In addition to this, the optical path when imaging beam 111 is non-polarized light, between 110 to the first wave plate 120 of display module
In be provided with polarization structure 160, the transmission polarization direction of reflection of polarization structure 150 and the polarization of polarization structure 160 penetrate direction
Orthogonal, it is 45 ° that the fast axle or slow axis of the first wave plate 120, which penetrate angular separation with the polarization of polarization structure 160, polarization structure 160
For non-polarized light to be converted to linearly polarized light, it is further ensured that, the imaging beam 111 across the first wave plate 120 is converted to circle
Polarised light, it can thus be appreciated that imaging beam 111 by polarization structure 160 generate linearly polarized light, after the second wave plate 140 again by
Circularly polarized light is converted to linearly polarized light.
Virtual display device includes first set gradually along 111 direction of propagation of imaging beam as a preferred method,
Lens group 300, the second lens group 310 and the third lens group 320, the first lens group 300 be set to part transflector structure 130 to
In optical path between second wave plate 140, the second lens group 310 is set to the second wave plate 140 between reflection of polarization structure 150
In optical path, the third lens group 320 is set to reflection of polarization structure 150 in 180 side optical path of the second lens group.
Wherein the first lens group 300, the second lens group 310 and the third lens group 320 are imaged for showing, such as first saturating
Microscope group 300, the second lens group 310 and the third lens group 320 are plano-convex lens, wherein the first lens group 300 and the second lens
For the crowning of group 310 towards 111 incident direction of imaging beam, the crowning of the third lens group 320 is incident backwards to imaging beam 111
Direction includes by single lens or multiple eyeglasses in the first lens group 300, the second lens group 310 and the third lens group 320.
Referring to Fig.2, in a second embodiment, virtual display device includes setting gradually along 111 direction of propagation of imaging beam
The 4th lens group 330 and the 5th lens group 340, the 4th lens group 330 is set to 130 to the second wave plate of part transflector structure
In optical path between 140, the 5th lens group 340 is set in the optical path between 170 to the second wave plate 140 of the first lens group.
Refering to Fig. 3, in the third embodiment, virtual display device includes setting gradually along 111 direction of propagation of imaging beam
The 6th lens group 350 and the 7th lens group 360, the 6th lens group 350 is set to 130 to the second wave plate of part transflector structure
In optical path between 140, the 7th lens group 360 is set to the second wave plate 140 into the optical path between reflection of polarization structure 150.
Refering to Fig. 4, in the fourth embodiment, virtual display device includes setting gradually along 111 direction of propagation of imaging beam
The 8th lens group 370 and the 9th lens group 380, the 8th lens group 370 is set to 130 to the second wave plate of part transflector structure
In optical path between 140, the 9th lens group 380 is set to the optical path that reflection of polarization structure 150 deviates from 140 side of the second wave plate
In.
Refering to Fig. 5, in the 5th embodiment, virtual display device includes the tenth lens group 390, and the tenth lens group 390 is set
It is placed in the optical path between 130 to the second wave plate 140 of part transflector structure.
Virtual display device includes several lens groups of shell, the first wave plate 120, the second wave plate as a preferred method,
140, part transflector structure 130 and reflection of polarization structure 150 are to be set to the film layer on the lens group surface.
First wave plate 120 and the second wave plate 140, part transflector structure 130, reflection of polarization structure 150 and polarization structure
160 can be optical crystal chip, that is to say, that the first wave plate 120 and the second wave plate 140, part transflector structure 130, reflection of polarization knot
Structure 150 can be the optical element being independently arranged, the film layer that can also be coated with or stick on lens group optical mirror plane.Similarly, partially
Vibration structure 160 can be the optical element being independently arranged or the film layer that is coated on microscope group optical mirror plane.
The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all
Under the utility model design of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (10)
1. a kind of virtual display device characterized by comprising
Display module, for emitting imaging beam, the imaging beam is non-polarized light；
The imaging beam direction of propagation of the non-polarized light is disposed with the first wave plate and the second wave plate；The non-polarized light
Imaging beam is converted into linearly polarized light beam and injects first wave plate and second wave plate；
First wave plate and second wave plate are quarter-wave plate, and the quarter-wave plate is with fast axle and slowly
The fast axle of axis, the fast axle of first wave plate and second wave plate is orthogonal or the slow axis and described second of first wave plate
The slow axis of wave plate is orthogonal；
Or
Display module, for emitting imaging beam, the imaging beam is linearly polarized light；
The imaging beam direction of propagation of the linearly polarized light is disposed with the first wave plate and the second wave plate；The linearly polarized light
Imaging beam injects first wave plate and second wave plate；
First wave plate and second wave plate are quarter-wave plate, and the quarter-wave plate is with fast axle and slowly
The fast axle of axis, the fast axle of first wave plate and second wave plate is orthogonal or the slow axis and described second of first wave plate
The slow axis of wave plate is orthogonal.
2. virtual display device as described in claim 1, which is characterized in that the virtual display device is described including being set to
Part transflector structure between first wave plate and second wave plate, the virtual display device further include reflection of polarization knot
Structure, the reflection of polarization structure setting deviate from first wave plate side, the reflection of polarization structure tool in second wave plate
There is a transmission polarization direction, the imaging beam forms the first linearly polarized light after second wave plate, and the First Line is inclined
The polarization direction of vibration light and the transmission polarization direction of the reflection of polarization structure are orthogonal, and first linearly polarized light is by described inclined
The catoptric arrangement that shakes reflects, and is successively again passed through institute through the reflection of second wave plate and the part transflector structure
It states the second wave plate and forms the second linearly polarized light, the transmission of the polarization direction of second linearly polarized light and the reflection of polarization structure
Polarization direction is identical.
3. virtual display device as claimed in claim 2, which is characterized in that when the imaging beam is linearly polarized light, then
The transmission polarization direction of the reflection of polarization structure is orthogonal with the polarization direction of the imaging beam, the fast axle of first wave plate
Or slow axis and imaging beam polarization direction angle are 45 °.
4. virtual display device as claimed in claim 2, which is characterized in that when the imaging beam is non-polarized light, then
The display module is provided with polarization structure into the optical path between first wave plate, and the transmission of the reflection of polarization structure is inclined
Vibration direction is orthogonal through direction with the polarization of the polarization structure, the fast axle or slow axis of first wave plate and the polarization structure
Polarization through angular separation be 45 °.
5. virtual display device as described in claim 3 or 4, which is characterized in that the virtual display device includes along described
The first lens group, the second lens group and the third lens group that the imaging beam direction of propagation is set gradually, first lens group are set
The part transflector structure is placed in into the optical path between second wave plate, second lens group is set to described second
For wave plate into the optical path between the reflection of polarization structure, the third lens group is set to the reflection of polarization structure away from institute
It states in the second lens group side optical path.
6. virtual display device as described in claim 3 or 4, which is characterized in that the virtual display device includes along described
The 4th lens group and the 5th lens group that the imaging beam direction of propagation is set gradually, the 4th lens group are set to the part
For transflector structure into the optical path between second wave plate, the 5th lens group is set to the 4th lens group to described
In optical path between second wave plate.
7. virtual display device as described in claim 3 or 4, which is characterized in that the virtual display device includes along described
The 6th lens group and the 7th lens group that the imaging beam direction of propagation is set gradually, the 6th lens group are set to the part
Transflector structure into the optical path between second wave plate, the 7th lens group be set to second wave plate to it is described partially
In optical path between vibration catoptric arrangement.
8. virtual display device as described in claim 3 or 4, which is characterized in that the virtual display device includes along described
The 8th lens group and the 9th lens group that the imaging beam direction of propagation is set gradually, the 8th lens group are set to the part
Into the optical path between second wave plate, the 9th lens group is set to the reflection of polarization structure and deviates from transflector structure
In the optical path of second wave plate side.
9. virtual display device as described in claim 3 or 4, which is characterized in that the virtual display device includes the tenth saturating
Microscope group, the tenth lens group are set to the part transflector structure into the optical path between second wave plate.
10. virtual display device as described in claim 3 or 4, which is characterized in that if the virtual display device includes parching
Microscope group, first wave plate, second wave plate, the part transflector structure and the reflection of polarization structure is are set to
State the film layer on lens group surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075048.7U CN209265082U (en) | 2019-01-16 | 2019-01-16 | Virtual display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920075048.7U CN209265082U (en) | 2019-01-16 | 2019-01-16 | Virtual display device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764266A (en) * | 2019-11-13 | 2020-02-07 | 歌尔股份有限公司 | Optical system and virtual reality equipment |
| CN111443491A (en) * | 2020-04-30 | 2020-07-24 | 京东方科技集团股份有限公司 | Optical display system, control method and display device |
| CN111650758A (en) * | 2020-08-03 | 2020-09-11 | 曹旸 | Light splitting module and waveguide display structure |
| CN113050275A (en) * | 2019-12-27 | 2021-06-29 | 宏碁股份有限公司 | Near-to-eye display device |
| WO2022111601A1 (en) * | 2020-11-27 | 2022-06-02 | 华为技术有限公司 | Eye movement tracking apparatus and electronic device |
-
2019
- 2019-01-16 CN CN201920075048.7U patent/CN209265082U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764266A (en) * | 2019-11-13 | 2020-02-07 | 歌尔股份有限公司 | Optical system and virtual reality equipment |
| CN110764266B (en) * | 2019-11-13 | 2022-07-22 | 歌尔光学科技有限公司 | Optical system and virtual reality equipment |
| CN113050275A (en) * | 2019-12-27 | 2021-06-29 | 宏碁股份有限公司 | Near-to-eye display device |
| CN111443491A (en) * | 2020-04-30 | 2020-07-24 | 京东方科技集团股份有限公司 | Optical display system, control method and display device |
| CN111650758A (en) * | 2020-08-03 | 2020-09-11 | 曹旸 | Light splitting module and waveguide display structure |
| WO2022111601A1 (en) * | 2020-11-27 | 2022-06-02 | 华为技术有限公司 | Eye movement tracking apparatus and electronic device |
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Effective date of registration: 20201015 Address after: 261031 north of Yuqing street, east of Dongming Road, high tech Zone, Weifang City, Shandong Province (Room 502, Geer electronic office building) Patentee after: GoerTek Optical Technology Co.,Ltd. Address before: 266104 Laoshan Qingdao District North House Street investment service center room, Room 308, Shandong Patentee before: GOERTEK TECHNOLOGY Co.,Ltd. |