CN217506279U - Optical display system and wearable equipment - Google Patents
Optical display system and wearable equipment Download PDFInfo
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- CN217506279U CN217506279U CN202221411776.9U CN202221411776U CN217506279U CN 217506279 U CN217506279 U CN 217506279U CN 202221411776 U CN202221411776 U CN 202221411776U CN 217506279 U CN217506279 U CN 217506279U
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Abstract
The utility model provides an optical display system and wearable equipment, a display unit, a first optical structure, a second optical structure, a third optical structure and a fourth optical structure, wherein the first optical structure is arranged on a light-emitting path of the display unit; the second optical structure is arranged on a transmission light path of the first optical structure and is obliquely arranged; the third optical structure is arranged on the reflected light path of the second optical structure; the fourth optical structure is arranged on a transmission light path of the third optical structure; the second optical structure comprises a first polarization reflecting film, a first optical substrate and a first absorption type linear polarization film which are arranged in sequence relative to the first optical structure; the third optical structure comprises a first phase delay film, a partial transmission partial reflection film, a second optical substrate and a first antireflection film which are arranged in sequence relative to the second optical structure; the imaging quality is good, no display light leakage exists, and the confidentiality is good; this wearable equipment is dressed conveniently, and the commonality is good, the security.
Description
Technical Field
The utility model belongs to the technical field of the optical imaging, more specifically say, relate to an optical display system and wearable equipment.
Background
One of core technologies in the field of Augmented Reality (AR) is a transmissive optical display system, which can superimpose a computer-generated image on the real vision of a user, so that a virtual image and a real image are seamlessly fused. The combination of the digital world and the real world brings a completely new experience to the user.
At present, the transmission optical display has the schemes of holographic grating, reflection waveguide, common reflection prism, free-form surface prism, and the like. These solutions are generally associated with problems of small eye movement, poor image quality or display leakage. When the eye movement range is small, the display image quality is deteriorated and even the image cannot be displayed when the user performs small eye movement; the leakage of the display content causes that the information watched by the user is easily perceived by the outside, and the confidentiality is poor; both of these disadvantages degrade the use experience of the augmented reality wearable device.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide an optical display system and wearable equipment to there is the technical problem that the display content reveals, shows the picture degradation in solving current wearable equipment.
In order to achieve the above object, the utility model adopts the following technical scheme: the optical display system comprises a display unit, a first optical structure, a second optical structure, a third optical structure and a fourth optical structure, wherein the first optical structure is arranged on a light emergent path of the display unit; the second optical structure is arranged on a transmission light path of the first optical structure and is obliquely arranged; the third optical structure is arranged on a reflection light path of the second optical structure; the fourth optical structure is arranged on a transmission light path of the third optical structure;
the second optical structure comprises a first optical substrate, a first absorption type linear polarization film is attached to one side, far away from the first optical structure, of the first optical substrate, and a first polarization reflection film is attached to one side, close to the first optical structure, of the first optical substrate;
the third optical structure comprises a second optical substrate, and a partial transmission and partial reflection film is plated on one side of the second optical substrate, which is close to the second optical structure; and a first phase retardation film is arranged on the side of the partial transmission and partial reflection film far away from the second optical substrate.
Optionally, the display unit includes an image display unit and a polarizing film attached to a side of the image display unit close to the first optical structure.
Optionally, the fourth optical structure comprises a third optical substrate, a second absorbing type linear polarizing film disposed on a side of the third optical substrate adjacent to the third optical structure; and a second phase retardation film is arranged on one side, far away from the third optical substrate, of the second absorption type linear polarization film, and a first antireflection film is arranged on one side, close to the third optical structure, of the second phase retardation film.
Optionally, the number of the optical elements included in the first optical structure is at least one, and the optical elements are sequentially disposed on the light-emitting path of the display unit.
Optionally, the second optical structure further comprises a third antireflection film coated or attached to the first absorbing type polarizing film on a side away from the first optical substrate.
Optionally, the third optical structure further comprises a second antireflection film plated on one side of the second optical substrate far away from the second optical structure, the birefringence characteristic Re of the second optical substrate is less than or equal to 30nm, so-called Re = (nx-ny) × d, nx refers to the refractive index in the maximum direction of the in-plane refractive index, ny refers to the refractive index in the direction orthogonal to nx, and d is the thickness of the second optical substrate.
Optionally, the third optical structure further includes a first phase retardation film attached to a side of the partially transmissive partially reflective film away from the second optical substrate, and a fourth antireflection film is coated or attached to a side of the first phase retardation film away from the second optical substrate.
Optionally, the third optical structure further includes a first phase retardation film clamped on a side of the partially transmissive partially reflective film away from the second optical substrate, and a fifth antireflection film is coated or bonded on a side of the first phase retardation film close to and away from the second optical structure
Optionally, the two-sided type of the second optical substrate is: the third optical base material is one of a spherical surface, an aspherical surface and a free-form surface, and the two-side surface type of the third optical base material is as follows: one of a plane, a spherical surface, an aspherical surface, and a free-form surface.
Another object of the utility model is to provide a wearable device, wearable device is including wearing the part and as above the optical display system, the optical display system set up in on wearing the part.
The utility model provides an augmented reality system's beneficial effect lies in: the display device comprises a display unit, a first optical structure, a second optical structure, a third optical structure and a fourth optical structure, wherein the first optical structure is arranged on a light emergent path of the display unit; the second optical structure is arranged on a transmission light path of the first optical structure and is obliquely arranged; the third optical structure is arranged on a reflection light path of the second optical structure; the fourth optical structure is arranged on a transmission light path of the third optical structure; the second optical structure comprises a first optical substrate, a first absorption type linear polarization film is attached to one side, far away from the first optical structure, of the first optical substrate, and a first polarization reflection film is attached to one side, close to the first optical structure, of the first optical substrate; the third optical structure comprises a second optical substrate, and a first antireflection film is plated on one side, far away from the second optical structure, of the second optical substrate; a partially transmitting and partially reflecting film is plated on one side of the second optical substrate close to the second optical structure; a first phase retardation film is arranged on one side of the partial transmission partial reflection film, which is far away from the second optical substrate; compared with the prior art, partial light of an incident image light beam is reflected by the second optical structure and the third optical structure and then sequentially passes through the first polarization reflecting film, the first optical base material and the first absorption type line polarizing film to be emitted, the rest light beam passes through the third optical structure and then reaches the fourth optical structure and is blocked by the fourth optical structure, external light beams sequentially pass through the fourth optical structure, the second optical base material, the partial transmission partial reflecting film and the first phase delay film of the third optical structure, and the first polarization reflecting film, the first optical base material and the first absorption type line polarizing film of the second optical structure and then are incident to human eyes, so that the imaging quality is good; the display light leakage is avoided, the confidentiality is good, and the use experience of a user is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an optical display system according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an optical display system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an optical display system according to a third embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-a display unit; 11-an image display unit; 12-a polarizing film; 2-a first optical structure; 3-a second optical structure; 31-a first optical substrate; 32-a first absorbing type linear polarizing film; 33-a first polarizing reflective film; 34-a third antireflection film; 4 a third optical structure; 41-a second optical substrate; 42-partially transmissive partially reflective film; 43-a first phase retardation film; 44-a second antireflection film; 45-fourth antireflection film; 46-a fifth antireflection film; 5-a fourth optical structure; 51-a third optical substrate; 52-second absorbing type linear polarizing film; 53-second phase retardation film; 54-first antireflective film.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. When an element is referred to as being "disposed" on another element, the other element may or may not be directly on the one element, but may be oppositely disposed.
It is to be understood that the terms "side," "adjacent," "remote," and the like are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, configuration, and operation in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of an optical display system according to a first embodiment of the present invention, a first embodiment of the present invention provides an optical display system, including a display unit 1, a first optical structure 2, a second optical structure 3, a third optical structure 4 and a fourth optical structure 5, wherein the first optical structure 2 is disposed on a light-emitting path of the display unit 1; the second optical structure 3 is arranged on a transmission light path of the first optical structure 2 and is obliquely arranged; the third optical structure 4 is arranged on a reflection light path of the second optical structure 3; the fourth optical structure 5 is arranged on a transmission light path of the third optical structure 4;
the second optical structure 3 comprises a first optical substrate 31, a first absorbing type linear polarization film 32 is attached to one side of the first optical substrate 31 far away from the first optical structure 2, and a first polarization reflection film 33 is attached to one side of the first optical substrate 31 near the first optical structure 2;
the third optical structure 4 comprises a second optical substrate 41, and a partially transmissive and partially reflective film 42 is plated on one side of the second optical substrate 41 close to the second optical structure 3; a first phase retardation film 43 is provided on the partially transmissive partially reflective film 42 on the side away from the second optical substrate 41.
The utility model discloses the specific working process of optical display system of first embodiment does: part of light rays of an incident image light beam are reflected by the second optical structure 3 and the third optical structure 4 and then sequentially pass through the first polarization reflection film 33, the first optical base material 31 and the first absorption type linear polarization film 32 to be emitted, the rest of light rays pass through the third optical structure 4 and then reach the fourth optical structure 5 and are blocked by the fourth optical structure 5, external light rays sequentially pass through the fourth optical structure 5, the second optical base material 41, the partial transmission partial reflection film 42 and the first phase retardation film 43 of the third optical structure 4, the first polarization reflection film 33, the first optical base material 31 and the first absorption type linear polarization film 32 of the second optical structure 3 and then enter human eyes, and therefore the human eyes can see the external light rays. Therefore, the augmented reality system of the utility model can make human eyes see the light inside the augmented reality system and the light outside simultaneously, which can make the imaging quality good; and the display light leakage can be prevented, the security is good, and the use experience of a user is improved.
Specifically, the display unit 1 includes an image display unit 11 and a polarizing film 12, the polarizing film 12 is attached to a side of the image display unit 11 close to the first optical structure 2, and an incident image beam emitted from the image display unit 11 passes through the polarizing film 12 and is corrected into a polarized incident light.
In a specific implementation, the image display unit 11 may be one of an OLED type, a DLP type, and a micro led micro display device.
It should be noted that, when the image display unit 11 is one of an LCD type and an LCOS type micro display device, the polarizing film 12 does not need to be attached to the side of the image display unit 11 close to the first optical structure 2.
In particular, the fourth optical structure 5 comprises a third optical substrate 51, on the side of which third optical substrate 51 close to the third optical structure 4 a second absorbing type linear polarizing film 52 is provided; a second phase retardation film 53 is disposed on a side of second absorbing type polarizing film 52 away from third optical substrate 51, and a first antireflection film 54 is disposed on a side of second phase retardation film 53 close to third optical structure 4.
The image light passes through the polarizing film 12, is S-linearly polarized light without loss of generality, is reflected by the first polarization reflection film 33, the reflected S-linearly polarized light passes through the fourth antireflection film 45 and the first phase retardation film 43 and then becomes left-circularly polarized light, the left-circularly polarized light passes through the second optical substrate and then still remains left-circularly polarized light without changing the polarization state of the light, and then enters the third optical substrate 51 from one side of the second phase retardation film 53, the left-circularly polarized light passes through the second phase retardation film 53 and then becomes S-linearly polarized light, the S-linearly polarized light reaches the second absorption type polarizing film 52, and the second absorption type polarizing film 52 is set to an angle capable of absorbing the S-linearly polarized light, so that absorption of leakage light can be realized, and the influence on the world brightness observed by a user is small.
Specifically, the first optical structure 2 includes at least one optical element and is sequentially disposed on the light-emitting path of the display unit 1.
Specifically, the two-sided type of the second optical substrate 41 is: one of a spherical surface, an aspherical surface, and a free-form surface, the third optical base material 51 has a two-sided type: one of a plane, a spherical surface, an aspherical surface, and a free-form surface.
Example two
Referring to fig. 2, fig. 2 is a schematic structural diagram of an optical display system according to a second embodiment of the present invention, which is different from the first embodiment only in that: second optical structure 3 further includes a third antireflection film 34 coated or otherwise applied to the side of first absorbing type polarizing film 32 away from first optical substrate 31.
Specifically, the third optical structure 4 further includes a second antireflection film 44 plated on a side of the second optical substrate 41 away from the second optical structure 3, and the birefringence Re of the second optical substrate 41 is not greater than 30nm, where Re = (nx-ny) × d, nx refers to the refractive index in the maximum direction of the in-plane refractive index, ny refers to the refractive index in the direction orthogonal to nx, and d is the thickness of the second optical substrate.
It should be noted that second antireflection film 44 may also be disposed on one side of second optical structure 3 by coating or other attaching method
Specifically, the third optical structure 4 further includes a first phase retardation film 43 attached to a side of the partially transmissive partially reflective film 42 away from the second optical substrate 41, and a fourth antireflection film 45 is coated or attached to a side of the first phase retardation film 43 away from the second optical substrate 41.
It should be noted that, the image light is reflected by the first polarization reflection film 33, the reflected S-polarized light is changed into left-handed circularly polarized light after passing through the fourth antireflection film 45 and the first phase retardation film 43, when passing through the partial transmission partial reflection film 42, a part of the light is reflected to form right-handed circularly polarized reflected light, the rest of the light is transmitted out of the third optical structure to transmit light, the right-handed circularly polarized reflected light is changed into P-polarized light after passing through the first phase retardation film 43 to enter the second optical structure, and the P-polarized light is transmitted out to reach human eyes after passing through the first polarization reflection film 33, the first optical base material 31, the first absorption type polarizing film 32, and the third antireflection film 34 in sequence, so that people can see a virtual image at a specific position and a specific magnification factor formed by the light emitted from the display unit 1.
EXAMPLE III
Referring to fig. 3 and fig. 3, a schematic structural diagram of an optical display system according to a third embodiment of the present invention is shown, in which the third embodiment of the present invention provides an optical display system, which is different from the second embodiment only in that: the third optical structure 4 further includes a first phase retardation film 43 engaged with the partially transmissive partially reflective film 42 on a side away from the second optical substrate 41, and a fifth antireflection film 46 is coated or bonded on each of the sides of the first phase retardation film 43 close to and away from the second optical structure 3.
The first phase retardation film 43 may be bonded or otherwise engaged to the partially transmissive partially reflective film 42 on the side away from the second optical substrate 41.
Example four
A fourth embodiment of the present invention provides a wearable device, which comprises a wearable component and an optical display system as described above, wherein the optical display system is disposed on the wearable component.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An optical display system comprises a display unit, a first optical structure, a second optical structure, a third optical structure and a fourth optical structure, wherein the first optical structure is arranged on a light emergent path of the display unit; the second optical structure is arranged on a transmission light path of the first optical structure and is obliquely arranged; the third optical structure is arranged on a reflection light path of the second optical structure; the fourth optical structure is arranged on a transmission light path of the third optical structure;
the second optical structure comprises a first optical substrate, a first absorption type linear polarization film is attached to one side, far away from the first optical structure, of the first optical substrate, and a first polarization reflection film is attached to one side, close to the first optical structure, of the first optical substrate;
the third optical structure comprises a second optical substrate, and a partial transmission and partial reflection film is plated on one side of the second optical substrate, which is close to the second optical structure; and a first phase retardation film is arranged on the side of the partial transmission and partial reflection film far away from the second optical substrate.
2. The optical display system of claim 1, wherein the display unit comprises an image display unit and a polarizing film attached to a side of the image display unit adjacent to the first optical structure.
3. The optical display system of claim 1, wherein the fourth optical structure comprises a third optical substrate, a second absorbing type linear polarizing film disposed on a side of the third optical substrate adjacent to the third optical structure; and a second phase retardation film is arranged on one side, far away from the third optical substrate, of the second absorption type linear polarization film, and a first antireflection film is arranged on one side, close to the third optical structure, of the second phase retardation film.
4. The optical display system according to claim 1, wherein the first optical structure comprises at least one optical element and is sequentially disposed on the light path of the display unit.
5. The optical display system of claim 1, wherein the second optical structure further comprises a third antireflection film coated or attached to the first absorbing type-polarizing film on a side away from the first optical substrate.
6. The optical display system according to claim 5, wherein the third optical structure further comprises a second antireflection film coated on a side of the second optical substrate away from the second optical structure, and the second optical substrate has a birefringence property Re ≦ 30nm, where Re = (nx-ny) × d, nx refers to a refractive index in a maximum in-plane refractive index direction, ny refers to a refractive index in a direction orthogonal to nx, and d is a thickness of the second optical substrate.
7. The optical display system according to claim 6, wherein the third optical structure further comprises a first phase retardation film attached to the partially transmissive partially reflective film on a side away from the second optical substrate, and a fourth antireflection film is coated or attached to the first phase retardation film on a side away from the second optical substrate.
8. The optical display system of claim 6, wherein the third optical structure further comprises a first phase retardation film engaged with the partially transmissive partially reflective film on a side thereof away from the second optical substrate, and a fifth antireflection film is coated or bonded on a side of the first phase retardation film adjacent to and away from the second optical structure.
9. The optical display system of claim 1, wherein the second optical substrate is two-sided: the third optical base material is one of a spherical surface, an aspherical surface and a free-form surface, and the two-side surface type of the third optical base material is as follows: one of a plane, a spherical surface, an aspherical surface, and a free-form surface.
10. A wearable device, characterized by: comprising a wearing part and an optical display system according to any one of claims 1-9, said optical display system being arranged on said wearing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221411776.9U CN217506279U (en) | 2022-06-08 | 2022-06-08 | Optical display system and wearable equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221411776.9U CN217506279U (en) | 2022-06-08 | 2022-06-08 | Optical display system and wearable equipment |
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| Publication Number | Publication Date |
|---|---|
| CN217506279U true CN217506279U (en) | 2022-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221411776.9U Active CN217506279U (en) | 2022-06-08 | 2022-06-08 | Optical display system and wearable equipment |
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| Country | Link |
|---|---|
| CN (1) | CN217506279U (en) |
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2022
- 2022-06-08 CN CN202221411776.9U patent/CN217506279U/en active Active
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