CN111090172A - Near-to-eye display system and device for adjusting transparency by using electrochromic material - Google Patents
Near-to-eye display system and device for adjusting transparency by using electrochromic material Download PDFInfo
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- CN111090172A CN111090172A CN202010023131.7A CN202010023131A CN111090172A CN 111090172 A CN111090172 A CN 111090172A CN 202010023131 A CN202010023131 A CN 202010023131A CN 111090172 A CN111090172 A CN 111090172A
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- 238000002834 transmittance Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229920001940 conductive polymer Polymers 0.000 claims description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 3
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 3
- 150000002602 lanthanoids Chemical class 0.000 claims description 3
- 239000002086 nanomaterial Substances 0.000 claims description 3
- 150000002894 organic compounds Chemical class 0.000 claims description 3
- 229920000767 polyaniline Polymers 0.000 claims description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims 1
- 230000003190 augmentative effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- G02B27/0101—Head-up displays characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/1514—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
- G02F1/155—Electrodes
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The invention relates to the technical field of near-eye display, in particular to a near-eye display system and a device for adjusting transparency by using an electrochromic material, wherein the near-eye display system comprises: a micro display screen displaying an image; a waveguide system including a waveguide sheet that renders the natural light for viewing and renders an image displayed from the micro display screen on the natural light into a human eye; an adjustable transparency system comprising electrode layers with electrochromic material disposed therebetween, the adjustable transparency system darkening or rendering invisible portions of the waveguide sheet that present natural light. The adjustable transparency system in the near-eye display system can adjust the transparency of the near-eye display system according to the intensity of external light and can switch between AR and VR modes.
Description
Technical Field
The invention relates to the technical field of near-eye display, in particular to a near-eye display system and device for adjusting transparency by using electrochromic materials.
Background
Augmented reality is a technology for fusing virtual information and a real world, wherein a near-eye display device is a key link in the augmented reality technology. The near-eye display device can enable a user to see a real world and simultaneously see a virtual image constructed by a computer, the brightness of the virtual image seen by human eyes is limited due to the light source brightness of the micro display screen image, when the user uses the near-eye display device outdoors, the contrast of the virtual image is reduced due to the fact that an external light source is too strong, and therefore the user experience is influenced due to the fact that the virtual image superimposed on the real world is difficult to see clearly. The current common mode is to add a filter in front of the near-eye display device to reduce the light inlet amount of an external light source, and the scheme has obvious defects that the transparency is not adjustable, the intensity change of the external light cannot be correspondingly adjusted, the applicable scene range is limited, the filter needs to be taken down when the near-eye display device is used indoors with insufficient light, and the operation is complicated.
Patent US20190324274a1 proposes an adjustable transparency head-mounted display in which an ultraviolet light source and a photochromic layer are provided, the emission of which can be controlled to adjust the transparency of the photochromic layer, thereby improving the contrast of the virtual image. However, this patent is too complicated, and not only need to add the ultraviolet light source, still need to add the ultraviolet absorption layer and prevent that ultraviolet ray from getting into user's eyes, still need design extra optical device in addition, add heating element, obviously promoted display device's cost, volume and consumption.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks of the prior art, the present invention provides a near-eye display system and a near-eye display apparatus using electrochromic material to adjust transparency, so as to solve the above-mentioned problems in the background art.
The technical scheme adopted by the invention for solving the problems in the prior art is as follows: a near-eye display system and apparatus for adjusting transparency using an electrochromic material, the near-eye display system comprising:
a micro display screen displaying an image;
a waveguide system including a waveguide sheet that renders the natural light for viewing and renders an image displayed from the micro display screen on the natural light into a human eye;
an adjustable transparency system comprising electrode layers with electrochromic material disposed therebetween, the adjustable transparency system darkening or rendering invisible portions of the waveguide sheet that present natural light.
As a preferable aspect of the present invention, the adjustable transparency system is disposed above the waveguide sheet, and the natural light sequentially passes through the adjustable transparency system and the waveguide sheet.
As a preferred scheme of the present invention, the electrode layer includes an upper electrode and a lower electrode, the lower electrode is disposed above the waveguide sheet, the electrochromic material is disposed between the upper electrode and the lower electrode, the upper electrode, the electrochromic material, and the lower electrode form the adjustable transparency system, and the natural light sequentially passes through the upper electrode, the electrochromic material, the lower electrode, and the waveguide sheet to enter human eyes.
As a preferable aspect of the present invention, the adjustable transparency system further includes a power supply configured to supply power to the electrode layer, and adjust the voltage of the electrode layer.
In a preferred embodiment of the present invention, the electrode layer is made of a transparent conductive material.
As a preferred embodiment of the present invention, the transparent conductive material may be indium tin oxide, aluminum-doped zinc oxide, conductive polymer, and nanomaterial.
In a preferred embodiment of the present invention, the electrochromic material is a material capable of reversibly changing transmittance and reflectance of light under the action of an applied electric field.
In a preferred embodiment of the present invention, the electrochromic material may be an inorganic transition metal oxide such as WO3, NiO, IrO, etc., or an organic compound such as viologen compound, polyaniline, lanthanide phthalocyanine, etc.
As a preferable embodiment of the present invention, the waveguide sheet may be an array waveguide, an embossed grating waveguide, a hologram grating waveguide, or the like.
A near-eye display apparatus provided with the near-eye display system of any one of the above.
Compared with the prior art, the invention has the following technical effects:
the invention relates to a near-eye display system and a device for adjusting transparency by using an electrochromic material, wherein the near-eye display system has the following technical effects:
1. the transparency of the near-eye display system is adjustable, when the external light is too strong, the transparency of the near-eye display system is reduced through the adjustable transparency system, so that a user can normally use the near-eye display system under the action of outdoor strong light, and the scene application range of the near-eye display device is expanded.
2. When the transparency of the near-eye display system is converted from the highest to the lowest, the conversion from an Augmented Reality (AR) mode to a Virtual Reality (VR) mode is equivalent, and the instant conversion of the AR and VR modes can be realized.
Drawings
FIG. 1 is a block diagram of a near-eye display system and apparatus for adjusting transparency using electrochromic materials in accordance with the present invention;
FIG. 2 is a block diagram of an adjustable transparency layer in a near-eye display system and apparatus utilizing electrochromic materials to adjust transparency in accordance with the present invention;
fig. 3 is a block diagram of an adjustable transparency system in a near-eye display system and apparatus utilizing electrochromic materials to adjust transparency according to the present invention.
Reference numbers in the figures: 10. a micro display screen; 20. a lens group; 30. a waveguide sheet; 40. an adjustable transparency system; 50. an eye; 60. natural light; 70. an image; 41. an electrode layer; 42. an electrochromic material; 411. an upper electrode; 412. and a lower electrode.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the near-eye display system includes a microdisplay 10, where the microdisplay 10 may be used to display an image 70 for a user of the near-eye display system. The microdisplay 10 may be a transparent microdisplay 10 so that a user can view real world objects through the microdisplay 10 while computer-generated content is overlaid on the real world objects by presenting a computer-generated image 70 on the display. The micro-display 10 may be formed from a transparent pixel array (e.g., a transparent organic light emitting diode display panel) or may be formed from a display device that provides an image 70 to a user through a beam splitter, holographic coupler, or other optical coupler (e.g., a display device such as liquid crystal on a silicon display).
The near-eye display system includes a waveguide system by which the image 70 created by the microdisplay 10 is reflected into the user's eye 50. The waveguide system includes a waveguide sheet 30 for presenting the natural light 60 to be viewed and presenting the image 70 displayed on the micro display screen 10 on the natural light 60 to enter human eyes, in this embodiment, the waveguide sheet 30 is an array waveguide, besides, the waveguide sheet 30 may be an embossed grating waveguide, a holographic grating waveguide, and the like.
If desired, a lens assembly 20 may be disposed between the microdisplay 10 and the waveguide system, and an image 70 created by the microdisplay 10 is adjusted by the lens assembly 20 and reflected by the waveguide system into the user's eye 50.
As shown in fig. 2: the near-eye display system includes an adjustable transparency system 40, the adjustable transparency system 40 being disposed above the waveguide sheet 30, the adjustable transparency system 40 being an adjustable transparency layer stacked in series with the waveguide sheet 30 such that the adjustable transparency layer overlies the waveguide sheet 30 and such that a user can view real world objects by adjusting the adjustable transparency layer and the microdisplay screen 10. The power supply regulated voltage may be used to implement a real-time regulated adjustable transparency system 40.
The adjustable transparency system 40 may be electrode layers 41 with an electrochromic material 42 disposed between the electrode layers 41. The adjustable transparency system 40 may include a light source that selectively exposes the adjustable transparency system 40 to light. The adjustable transparency layer may be controlled by a power source to adjust the regions between a transparent state and an opaque state. In the transparent state, the transmission may be 100% or near 100% (e.g., greater than 99%, greater than 95%, etc.). In the opaque state, the transmission is 0% or close to 0% (e.g., less than 1%, less than 5%, etc.). The electrode voltage may be adjusted to selectively produce an intermediate level of light transmission (e.g., a transmission value between 0% and 100%).
As shown in fig. 3: further, the electrode layer 41 includes an upper electrode 411 and a lower electrode 412, the lower electrode 412 is disposed above the waveguide sheet 30, the electrochromic material 42 is disposed between the upper electrode 411 and the lower electrode 412, the upper electrode 411, the electrochromic material 42 and the lower electrode 412 form the adjustable transparency system 40, and the natural light 60 sequentially passes through the upper electrode 411, the electrochromic material 42, the lower electrode 412 and the waveguide sheet 30 to enter human eyes. During operation, light from the microdisplay 10 can be directed to the waveguide sheet 30. The waveguide sheet 30 may direct light toward the user's eye 50. Natural light 60 from the real world may also pass through the adjustable transparency layer and the waveguide sheet 30 to reach the user's eye 50. In this way, the user can simultaneously see the real-world content and the overlay image 70 (e.g., the computer-generated image 70), thereby enabling the overlay of the virtual image with the real-world environment.
The upper electrode 411 and the lower electrode 412 are respectively connected with the positive electrode and the negative electrode of a power supply, and a voltage is applied to the upper electrode 411 and the lower electrode 412 by using the power supply, so that an external electric field is generated between the upper electrode 411 and the lower electrode 412, and the transmittance and the reflectivity of the electrochromic material 42 to light are reversibly changed under the action of the external electric field; by controlling the magnitude of the power voltage, the magnitude of the external electric field generated between the upper electrode 411 and the lower electrode 412 is changed, so that the electrochromic material 42 can change the transmittance and the reflectance of light under the action of the external electric fields with different magnitudes, and the transparency of the adjustable transparency layer can be adjusted.
Further, the adjustable transparency system 40 and the waveguide system may be placed in front of the user's eye 50 and transparent such that the user may view external objects through the adjustable transparency system 40 and the waveguide system.
In particular, to achieve that the adjustable transparency system 40 and the waveguide system can be placed in front of the user's eye 50 and be transparent, the electrode layer 41 is of a transparent conductive material, preferably indium tin oxide, aluminium doped zinc oxide, conductive polymers and nanomaterials.
Specifically, the electrochromic material 42 needs to realize the characteristic that the transmittance and reflectance of light can be reversibly changed under the action of an external electric field, and the material can be selected from inorganic transition metal oxides such as WO3, NiO, IrO and the like; in addition, the material can also adopt organic compounds such as viologen compounds, polyaniline, lanthanide phthalocyanines and the like.
A near-eye display system deployed at a near-eye display device may be used to provide computer-generated content overlaid on top of real-world content to a user. The real world content may be viewed directly by a user (e.g., by viewing real world objects through a transparent display panel, or by a waveguide system in a transparent display system that combines light from real world objects with light from a display panel). Configurations may also be used in which an image 70 of a real-world object is captured by a forward-facing camera and displayed to the user on a display.
The near-eye display system may be used for a near-eye display device. These devices may include portable consumer electronic devices (e.g., portable electronic devices such as mobile phones, tablets, glasses, other wearable devices), overhead displays in cockpit, vehicles, etc., display-based devices (projectors, televisions, etc.). Devices such as these may include transparent displays and other optical components. Device configurations in which virtual reality and/or augmented reality content is provided to a user having a head-mounted display are described herein as examples. However, this is merely exemplary. Any suitable device may be used to provide virtual reality and/or augmented reality content to a user).
Compared with the prior art, the invention has the following technical effects:
the invention relates to a near-eye display system and a device for adjusting transparency by using an electrochromic material, wherein the near-eye display system has the following technical effects:
1. the transparency of the near-eye display system is adjustable, when the external light is too strong, the transparency of the near-eye display system is reduced through the adjustable transparency system 40, so that a user can normally use the near-eye display system under the action of outdoor strong light, and the scene application range of the near-eye display device is expanded.
2. When the transparency of the near-eye display system is converted from the highest to the lowest, the conversion from an Augmented Reality (AR) mode to a Virtual Reality (VR) mode is equivalent, and the instant conversion of the AR and VR modes can be realized.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A near-eye display system for adjusting transparency using an electrochromic material, the near-eye display system comprising:
a micro display screen displaying an image;
a waveguide system including a waveguide sheet that renders the natural light for viewing and renders an image displayed from the micro display screen on the natural light into a human eye;
an adjustable transparency system comprising electrode layers with electrochromic material disposed therebetween, the adjustable transparency system darkening or rendering invisible portions of the waveguide sheet that present natural light.
2. A near-to-eye display system using electrochromic materials to adjust transparency according to claim 1, wherein: the adjustable transparency system is arranged above the waveguide sheet, and the natural light sequentially penetrates through the adjustable transparency system and the waveguide sheet.
3. A near-to-eye display system using electrochromic materials to adjust transparency according to claim 2, wherein: the electrode layer comprises an upper electrode and a lower electrode, the lower electrode is arranged above the waveguide sheet, the electrochromic material is arranged between the upper electrode and the lower electrode, the upper electrode, the electrochromic material and the lower electrode form the adjustable transparency system, and the natural light sequentially penetrates through the upper electrode, the electrochromic material, the lower electrode and the waveguide sheet to enter human eyes.
4. A near-to-eye display system using electrochromic materials to adjust transparency according to claim 3, wherein: the adjustable transparency system further comprises a power supply configured to supply power to the electrode layer, and adjust the voltage of the electrode layer.
5. A near-to-eye display system using electrochromic materials to adjust transparency according to claim 1 or 3, wherein: the electrode layer is made of transparent conductive materials.
6. The near-eye display system for adjusting transparency using an electrochromic material as claimed in claim 5, wherein: the transparent conductive material may be indium tin oxide, aluminum-doped zinc oxide, conductive polymers, and nanomaterials.
7. A near-to-eye display system using electrochromic materials to adjust transparency according to claim 1 or 3, wherein: the electrochromic material is a material capable of generating reversible change on light transmittance and reflectance under the action of an external electric field.
8. A near-to-eye display system using electrochromic materials to adjust transparency according to claim 7, wherein: the electrochromic material can be inorganic transition metal oxides such as WO3, NiO, IrO and the like or organic compounds such as viologen compounds, polyaniline, lanthanide phthalocyanines and the like.
9. A near-to-eye display system using electrochromic materials to adjust transparency according to claim 1, wherein: the waveguide sheet can adopt array waveguide, relief grating waveguide, holographic grating waveguide and the like.
10. A near-eye display device, characterized by: the near-eye display device is provided with the near-eye display system according to any one of claims 1 to 9.
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| CN202010023131.7A CN111090172A (en) | 2020-01-09 | 2020-01-09 | Near-to-eye display system and device for adjusting transparency by using electrochromic material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019680A (en) * | 2021-11-05 | 2022-02-08 | 苏州伯宇科技有限公司 | Imaging optimization system and method for AR glasses |
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