CN217821106U - Augmented reality display device - Google Patents
Augmented reality display device Download PDFInfo
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- CN217821106U CN217821106U CN202221993690.1U CN202221993690U CN217821106U CN 217821106 U CN217821106 U CN 217821106U CN 202221993690 U CN202221993690 U CN 202221993690U CN 217821106 U CN217821106 U CN 217821106U
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- 230000003190 augmentative effect Effects 0.000 title claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 230000010287 polarization Effects 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims description 42
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses an augmented reality display device, including display module assembly and anti-dazzling screen, display module assembly is used for throwing out image light to the eye box region, and display module assembly is at least including being used for conducting image light so that image light incides to the regional leaded light subassembly of eye box. The anti-dazzling screen is arranged on one side, far away from the eye box area, of the light guide assembly, the anti-dazzling screen comprises a substrate and a phase delay layer arranged on one side of the substrate, wherein when the phase delay layer enables light incident from one side, far away from the eye box area, to transmit through the phase delay layer, the phase delay amount between two polarization components orthogonal to each other of the light is increased, the phase delay amount of the light incident from one side, far away from the eye box area, is increased through the phase delay layer, more wavelength light rays incident from one side, far away from the eye box area, can penetrate through, and therefore the rainbow ripple phenomenon can be weakened. Therefore, the utility model discloses an augmented reality display device can weaken the phenomenon that the rainbow line appears when the user watches electronic display after wearing.
Description
Technical Field
The utility model relates to an augmented reality technical field especially relates to an augmented reality display device.
Background
An Augmented Reality (AR) technology is a new technology for seamlessly integrating real world information and virtual world information, and is characterized in that entity information (visual information, sound, taste, touch and the like) which is difficult to experience in a certain time space range of the real world originally is simulated and then superposed through a computer and other scientific technologies, virtual information is applied to the real world and is perceived by human senses, and therefore sensory experience beyond Reality is achieved. I.e. real environment and virtual objects are superimposed in real time onto the same picture or space.
However, for existing augmented reality display devices, rainbow stripes appear when a user watches an electronic display screen after wearing the device.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an augmented reality display device can weaken the phenomenon that the rainbow line appears when the user watches electronic display after wearing.
In order to achieve the above object, the utility model provides a following technical scheme:
an augmented reality display device comprises a display module and a shading sheet, wherein the display module is used for projecting image light rays to an eye box area, and the display module at least comprises a light guide assembly which is used for conducting the image light rays so that the image light rays are incident to the eye box area;
the light shielding sheet is arranged on one side, far away from the eye box area, of the light guide assembly, and comprises a base material and a phase delay layer arranged on one side of the base material, and the phase delay layer enables light rays incident from one side, far away from the eye box area, to be transmitted through the phase delay layer, so that the phase delay amount between two polarization components which are orthogonal to each other of the light rays is increased.
Preferably, the phase retardation layer imparts a phase retardation of greater than 3500nm to light.
Preferably, the phase retardation layer imparts a phase retardation of more than 3500nm to light having a wavelength in the range of 400nm to 700nm.
Preferably, the phase retardation layer satisfies the following relation: re = (nx-ny) × d, in which Re represents a phase retardation amount generated between two polarization components orthogonal to each other after light passes through the phase retardation layer, nx represents a refractive index in a direction in which a refractive index in a surface of the phase retardation layer is maximum, ny represents a refractive index in a direction orthogonal to the direction corresponding to nx, and d represents a thickness of the phase retardation layer.
Preferably, the phase retardation layer covers one side surface of the substrate.
Preferably, the surface of the base material is a plane, a spherical surface, an aspherical surface or a free-form surface.
Preferably, the liquid crystal display device further comprises an absorption type polarizing plate arranged on one side of the shading sheet close to the eye box area.
Preferably, an angle between an absorption axis of the absorption-type polarizer and an optical axis of the phase retardation layer is in a range of 40 ° to 50 ° or in a range of 130 ° to 140 °.
Preferably, the absorption-type polarizing plate is disposed between the light-shielding plate and the display module.
Preferably, the display module further includes a display, the light guide assembly includes a lens group, a first optical element and a second optical element, the lens group is disposed on a light outgoing path of the display, light emitted by the display is transmitted through the lens group and enters the first optical element, the first optical element is configured to reflect light from the lens group to the second optical element and transmit light from the second optical element, the second optical element is configured to reflect light from the first optical element back to the first optical element, and the light shielding sheet is disposed on a side of the second optical element away from the eye box region;
or, the display module assembly still includes the display, the leaded light subassembly includes the waveguide, the anti-dazzling screen set up in the waveguide is kept away from the regional one side of eyebox.
According to the above technical scheme, the utility model provides an augmented reality display device includes display module assembly and anti-dazzling screen, and display module assembly is used for throwing out image light to the eye box region, and display module assembly is at least including being used for conducting image light so that image light incides to the regional leaded light subassembly of eye box. The anti-dazzling screen sets up in the regional one side of keeping away from eye box of light guide assembly, the anti-dazzling screen includes the substrate and sets up in the phase delay layer of substrate one side, wherein, the phase delay layer makes when passing through the phase delay layer from the light of keeping away from the regional one side incidence of eye box, increase the phase delay volume between the two polarization components of the mutual quadrature of light, increased the phase delay volume from the light of keeping away from regional one side incidence of eye box through the phase delay layer, can make and see through light guide assembly and get into people's eye from more wavelength light of keeping away from regional one side incidence of eye box, thereby can weaken rainbow line phenomenon. Therefore, the utility model discloses an augmented reality display device can weaken the phenomenon that the rainbow line appears when the user watches electronic display after wearing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an augmented reality display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an augmented reality display device according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an augmented reality display device according to another embodiment of the present invention.
Reference numerals in the drawings of the specification include:
eye box area-100, display module-101, substrate-102, phase delay layer-103, display-104, lens group-105, first optical element-106, second optical element-107 and waveguide-108.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
The current augmented reality display device can set up the anti-dazzling screen in the light guide assembly one side of keeping away from the eye box region, and the anti-dazzling screen plays shading, pleasing to the eye effect. However, the light-shielding sheet has a birefringence characteristic due to stress caused by injection molding, and thus a dispersion phenomenon occurs when polarized light is transmitted. Then, if the user wears augmented reality display device to watch the electronic display screen, the polarized light that the electronic display screen sent incides the shading sheet and can produce the dispersion phenomenon, and only the light of specific wavelength can see through light guide component and get into the people's eye, consequently can observe the rainbow line phenomenon. To this, this embodiment provides an augmented reality display device, through set up phase delay layer at the anti-dazzling screen, can weaken the phenomenon that the rainbow line appears when the user watches electronic display after wearing.
Specifically, referring to fig. 1, fig. 1 is a schematic structural diagram of an augmented reality display device according to an embodiment, as shown in the figure, the augmented reality display device includes a display module 101 and a light shielding sheet, the display module 101 is configured to project image light to an eye box region 100, and the display module 101 at least includes a light guide assembly configured to guide the image light so that the image light is incident to the eye box region 100;
the light shielding sheet is disposed on a side of the light guide assembly away from the eye box area 100, the light shielding sheet includes a substrate 102 and a phase retardation layer 103 disposed on a side of the substrate 102, and the phase retardation layer 103 increases a phase retardation amount between two polarization components orthogonal to each other of a light ray when the light ray incident from the side away from the eye box area 100 is transmitted through the phase retardation layer 103.
The image light refers to light carrying image information, the display module 101 projects the image light to the eye box area 100, the image light enters the eyes of a user, and the user can watch an image. Solid lines with arrows in fig. 1 to 3 indicate the traveling direction of image light.
Light incident from a side away from the eye box area 100 can be incident on the eye box area 100 by passing through the light shielding sheet and the light guide member. The dotted lines with arrows in fig. 1 to 3 indicate the traveling direction of light incident from the side away from the eye box region 100. The phase retardation layer 103 increases the phase retardation amount of two polarization components orthogonal to each other of the light when the light incident from the side far from the eye box area 100 is transmitted through the phase retardation layer 103, so that if the base material 102 has a birefringence characteristic and a dispersion phenomenon occurs when the polarized light incident from the side far from the eye box area 100 is transmitted, the phase retardation amount of the light incident from the side far from the eye box area 100 is increased by the phase retardation layer 103, and more light of the wavelength incident from the side far from the eye box area 100 can be transmitted through the light guide assembly to enter human eyes, thereby reducing the rainbow interference phenomenon. Therefore, the augmented reality display device of the embodiment can weaken the phenomenon that rainbow stripes appear when a user watches the electronic display screen after wearing the display device.
In this embodiment, the phase retardation amount generated between the two polarization components of the phase retardation layer 103 that enable the light to be orthogonal to each other is not limited, and in practical application, the phase retardation amount may be set according to the requirement for the effect of eliminating the rainbow fringes. Alternatively, the phase retardation layer 103 may impart a phase retardation of greater than 3500nm to light. The phase retardation layer 103 has a birefringence characteristic, and thus a phase retardation amount can be generated between two polarization components in which transmitted light is orthogonal to each other.
Specifically, the phase retardation layer 103 satisfies the following relational expression: re = (nx-ny) × d, where Re represents the amount of phase retardation generated between two polarization components orthogonal to each other after light passes through the phase retardation layer, nx represents the refractive index in the direction where the refractive index is the largest in the surface of the phase retardation layer, ny represents the refractive index in the direction orthogonal to the direction corresponding to nx, and d represents the thickness of the phase retardation layer. In practical applications, the thickness d of the retardation layer 103 can be determined according to nx, ny and the phase retardation to be achieved according to the above relation.
The phase retardation layer 103 may specifically generate a phase retardation greater than 3500nm for light with a wavelength in a range of 400nm to 700nm, that is, the phase retardation layer 103 may generate a phase retardation for light in a visible light band.
Alternatively, the phase retardation layer 103 may be disposed on the side of the substrate 102 close to the cell region 100, as shown in fig. 1, so that light incident from the side far from the cell region 100 is transmitted through the substrate 102 and the phase retardation layer 103 in this order. Specifically, the retardation layer 103 may cover a surface of one side of the substrate 102. In this embodiment, the manner of forming the phase retardation layer 103 on one side surface of the substrate 102 is not limited, and the phase retardation layer 103 may be disposed on the substrate 102 by film injection or lamination.
The substrate 102 may have a birefringence due to stress caused by injection molding, such that when an incident light is transmitted through the substrate 102, a phase retardation is generated between two polarization components orthogonal to each other. The substrate 102 provides a phase retardation greater than 100nm for light having at least a first wavelength in the range of 400nm to 700nm.
In this embodiment, the surface type of the base material 102 is not limited, and may be, but not limited to, a plane, a spherical surface, an aspherical surface, or a free-form surface, and may be designed according to application requirements in practical applications.
Further preferably, the augmented reality display apparatus may further include an absorption-type polarizer disposed on a side of the light-shielding sheet near the eye box region 100. By arranging the absorption type polarizing film, light rays from one side far away from the eye box area 100 can penetrate through the light guide assembly more uniformly to enter human eyes, and the phenomenon of rainbow stripes when a user watches the electronic display screen after wearing the electronic display screen is further weakened. Because there are various angles of the absorption axis of the polarizer of the electronic display panel, the angle between the optical axis of the phase retardation layer 103 and the absorption axis of the polarizer on the electronic display panel is not fixed, and if no absorption polarizer is provided, there is still a slight rainbow effect at a specific angle. The absorption polarizer may specifically have an operating wavelength range of 400 to 700nm.
The absorbing polarizer may be disposed between the light-shielding sheet and the display module 101, the absorbing polarizer may be attached to the side of the phase retardation layer 103 away from the substrate 102, may be separately disposed between the light-shielding sheet and the display module 101, or may be disposed on the side of the display module 101 close to the light-shielding sheet. Preferably, the angle between the absorption axis of the absorbing polarizer and the optical axis of the phase retardation layer 103 is in the range of 40 ° to 50 ° or in the range of 130 ° to 140 °.
In this embodiment, the structure of the display module 101 is not limited, and the structure of the light guide element of the display module 101 is not limited. Optionally, as an implementation manner, the display module 101 may include a display, the light guide assembly includes a lens group, a first optical element and a second optical element, the lens group is disposed on a light outgoing path of the display, light emitted by the display is transmitted through the lens group and enters the first optical element, the first optical element is configured to reflect light from the lens group to the second optical element and transmit light from the second optical element, and the second optical element is configured to reflect light from the first optical element back to the first optical element. Referring to fig. 2, fig. 2 is a schematic structural diagram of an augmented reality display apparatus according to another embodiment, as shown in the figure, the lens group 105 is disposed on a light-emitting path of the display 104, an image light emitted by the display 104 is transmitted through the lens group 105 to enter the first optical element 106, and is reflected by the first optical element 106 to the second optical element 107, the second optical element 107 reflects the image light back to the first optical element 106, and the image light further transmits through the first optical element 106 and then enters the eye box region 100. The light-shielding sheet (including the substrate 102 and the phase retardation layer 103) is disposed on a side of the second optical element 107 away from the eye box area 100.
Optionally, as another embodiment, the display module 101 includes a display, the light guide assembly includes a waveguide, and image light emitted from the display is coupled into the waveguide, and the light propagates through the waveguide and is coupled out from the waveguide to be incident on the eye box area 100. Referring to fig. 3, fig. 3 is a schematic structural diagram of an augmented reality display device according to yet another embodiment, as shown in the figure, image light emitted from the display 104 is coupled into the waveguide 108, and the light propagates through the waveguide 108 and is coupled out from the waveguide 108 to be incident on the eye box region 100. The light-shielding sheet (including the substrate 102 and the phase retardation layer 103) is disposed on a side of the waveguide 108 away from the cell region 100.
It is right above the utility model provides an augmented reality display device has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.
Claims (10)
1. The augmented reality display equipment is characterized by comprising a display module and a shading sheet, wherein the display module is used for projecting image light rays to an eye box area, and the display module at least comprises a light guide assembly which is used for conducting the image light rays so that the image light rays are incident to the eye box area;
the light shielding sheet is arranged on one side, far away from the eye box area, of the light guide assembly and comprises a base material and a phase delay layer arranged on one side of the base material, and the phase delay layer enables light incident from one side, far away from the eye box area, to be transmitted through the phase delay layer, so that the phase delay amount between two mutually-orthogonal polarization components of the light is increased.
2. The augmented reality display device of claim 1, wherein the phase retardation layer imparts a phase retardation of greater than 3500nm to the light.
3. The augmented reality display device of claim 2, wherein the phase retardation layer produces a phase retardation of greater than 3500nm for light having a wavelength in the range of 400nm to 700nm.
4. The augmented reality display device of claim 1, wherein the phase retardation layer satisfies the following relationship: re = (nx-ny) × d, in which Re represents a phase retardation amount generated between two polarization components orthogonal to each other after light passes through the phase retardation layer, nx represents a refractive index in a direction in which a refractive index in a surface of the phase retardation layer is maximum, ny represents a refractive index in a direction orthogonal to the direction corresponding to nx, and d represents a thickness of the phase retardation layer.
5. The augmented reality display device of claim 1, wherein the phase retardation layer is coated on a side surface of the substrate.
6. The augmented reality display device of claim 5, wherein the substrate has a surface type that is a plane, a spherical surface, an aspherical surface, or a free-form surface.
7. The augmented reality display apparatus of claim 1, further comprising an absorption-type polarizing plate disposed on a side of the light-shielding plate near the eye box region.
8. The device of claim 7, wherein an angle between an absorption axis of the absorbing polarizer and an optical axis of the phase retardation layer is in a range of 40 ° to 50 ° or in a range of 130 ° to 140 °.
9. The device according to claim 7, wherein the absorption-type polarizer is disposed between the light-shielding sheet and the display module.
10. The augmented reality display device of any one of claims 1 to 9, wherein the display module further comprises a display, the light guide assembly comprises a lens group, a first optical element and a second optical element, the lens group is disposed on a light emergent path of the display, light emitted by the display is transmitted through the lens group and incident on the first optical element, the first optical element is used for reflecting the light from the lens group to the second optical element and transmitting the light from the second optical element, the second optical element is used for reflecting the light from the first optical element back to the first optical element, and the light shielding sheet is disposed on a side of the second optical element away from the eye box region;
or, the display module assembly still includes the display, the leaded light subassembly includes the waveguide, the anti-dazzling screen set up in the waveguide is kept away from one side in the eyebox region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221993690.1U CN217821106U (en) | 2022-07-28 | 2022-07-28 | Augmented reality display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221993690.1U CN217821106U (en) | 2022-07-28 | 2022-07-28 | Augmented reality display device |
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| Publication Number | Publication Date |
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| CN217821106U true CN217821106U (en) | 2022-11-15 |
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| CN202221993690.1U Active CN217821106U (en) | 2022-07-28 | 2022-07-28 | Augmented reality display device |
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