CN115437145A - Augmented reality display system and augmented reality display equipment - Google Patents

Abstract

The embodiment of the application discloses augmented reality display system and augmented reality display equipment. The polarization module modulates the light rays converged by the light ray convergence module into polarized light in a first direction or polarized light in a second direction; the light splitting delay module converts the transmitted polarized light in the first direction into elliptically polarized light and then emits the elliptically polarized light to the plane reflection module; the light is reflected to the light splitting delay module through the plane reflection module; the light splitting delay module converts the elliptical polarized light into polarized light in a second direction, and then the polarized light in the second direction is converted into elliptical polarized light and then is incident to the curved surface reflection module; the light is reflected to the light splitting delay module by the curved surface reflection module; the light splitting delay module modulates the elliptical polarized light into polarized light in a first direction and then the polarized light is incident into human eyes to form a virtual image; the curved surface reflection module transmits external light rays, and the external light rays are incident into human eyes to form a real object image after passing through the light splitting delay module; the included angle between the plane of the light splitting delay module and the plane of the plane reflection module is between 30 and 60 degrees.

Description

Augmented reality display system and augmented reality display equipment

Technical Field

The embodiment of the application relates to the technical field of display, in particular to an augmented reality display system and augmented reality display equipment.

Background

Augmented Reality (AR) can integrate a virtual world and a real world on a screen, achieves sensory experience beyond and increasing Reality by real-time superposition of multi-sensory simulation information such as vision, hearing and the like and real environment information, and has a very wide application prospect in various fields such as entertainment, medical treatment, military and the like.

Augmented reality display systems in the prior art generally belong to head-mounted systems, and therefore, the requirements of compact structure and light weight need to be satisfied to enhance the comfort of users.

However, the augmented reality display system in the prior art has the problems of overweight, low light energy utilization rate, ghost image and the like.

Disclosure of Invention

The application provides an augmented reality display system and augmented reality display equipment to it is less to realize the augmented reality display system volume, and compact structure is favorable to the lightweight effect of augmented reality display system.

In a first aspect, an embodiment of the present application provides an augmented reality display system, including: the device comprises a display module, a light converging module, a polarization module, a light splitting delay module, a plane reflection module and a curved surface reflection module;

the light converging module is used for converging the light emitted by the display module;

the polarization module is used for modulating the converged light into polarized light in a first direction or polarized light in a second direction;

the light splitting delay module is used for transmitting polarized light in a first direction, reflecting polarized light in a second direction, and converting the polarized light in the first direction into elliptically polarized light so that the elliptically polarized light is incident to the plane reflection module;

the plane reflection module is used for reflecting the elliptical polarized light to the light splitting delay module;

the light splitting delay module is also used for converting the elliptically polarized light into polarized light in a second direction, and then converting the polarized light in the second direction into elliptically polarized light to be incident to the curved surface reflection module;

the curved surface reflection module is used for reflecting the elliptical polarized light to the light splitting delay module;

the light splitting delay module is also used for modulating the elliptical polarized light into polarized light in the first direction and then enabling the polarized light to enter human eyes to form a virtual image;

the curved surface reflection module is used for transmitting external light rays, and then the external light rays enter human eyes through the light splitting delay module to form a real object image;

the plane where the light splitting delay module is located and the plane where the plane reflection module is located form a first included angle, and the first included angle is larger than or equal to 30 degrees and smaller than or equal to 60 degrees.

Optionally, the light converging module and the polarizing module are integrally disposed.

Optionally, the light converging module includes at least one negative lens and one positive lens;

the polarizing module includes a polarizing plate;

the polarizing plate is located on a surface of the negative lens or the positive lens.

Optionally, a second included angle is formed between the normal of the light splitting delay module and the normal of the curved surface reflection module, and the second included angle is greater than or equal to 30 ° and less than or equal to 60 °.

Optionally, a normal of the light converging module is parallel to a normal of the plane reflection module;

the optical axis of the light ray convergence module is vertical to the plane of the plane reflection module;

and the normal of the light ray convergence module is coincident with the normal of the display module.

Optionally, the spectral delay module includes a beam splitter, a polarizing reflective film, and a phase retarder;

the spectroscope comprises a first surface and a second surface, the phase retarder is positioned on the first surface, and the polarized reflecting film is positioned on one side of the phase retarder, which faces away from the first surface;

the polarization reflection film is used for transmitting polarized light in a first direction and reflecting polarized light in a second direction;

the phase retarder is used for converting the polarized light in the first direction into elliptical polarized light, the elliptical polarized light enters the first surface, passes through the spectroscope and the second surface and then enters the plane reflection module; the elliptical polarized light sequentially passes through the plane reflection module, the second surface, the spectroscope and the first surface is converted into polarized light in a second direction and then is incident to the polarization reflection film;

the polarization reflection film is used for reflecting the polarized light in the second direction to the phase retarder;

the phase retarder is further configured to convert the polarized light in the second direction into elliptically polarized light, so that the elliptically polarized light enters the curved surface reflection module after passing through the first surface, the beam splitter and the second surface.

Optionally, the spectral delay module includes a beam splitter, a polarizing reflective film, and a phase retarder;

the spectroscope comprises a first surface and a second surface, the polarization reflection film is positioned on the second surface, and the phase retarder is positioned on one side, away from the second surface, of the polarization reflection film;

the polarization reflection film is used for transmitting the polarized light in the first direction after sequentially passing through the first surface, the spectroscope and the second surface and reflecting the polarized light in the second direction so as to enable the polarized light in the first direction to be incident to the phase retarder;

the phase retarder is used for converting the polarized light in the first direction into elliptical polarized light and enabling the elliptical polarized light to be incident to the plane reflection module; the plane reflection module is used for reflecting the elliptical polarized light to the elliptical polarized light source and converting the elliptical polarized light sequentially reflected by the plane reflection module into polarized light in a second direction so that the polarized light in the second direction is incident to the polarization reflection film;

the polarization reflection film is also used for reflecting the polarized light in the second direction to the phase retarder;

the phase retarder is further configured to convert the polarized light in the second direction into elliptically polarized light, so that the elliptically polarized light is incident on the curved surface reflection module.

Optionally, the planar reflection module includes a third surface and a fourth surface;

the third surface and the fourth surface are both optical planes, and the augmented reality display system further comprises a second antireflection film; the third surface is provided with the second antireflection film, and the fourth surface is provided with a total reflection film; alternatively, the first and second liquid crystal display panels may be,

the third surface is an optical plane and is provided with a total reflection film.

In the alternative,

the curved surface reflection module comprises a fifth surface and a sixth surface; the fifth surface and the sixth surface are the same aspheric surface;

the sixth surface is provided with a light splitting film; alternatively, the first and second electrodes may be,

and the fifth surface is provided with a light splitting film.

In a second aspect, an embodiment of the present application further provides an augmented reality display device, where the augmented reality display device includes the augmented reality display system of the first aspect.

In the scheme of the application, the light emitted by the display module is converged by the light converging module, then the converged light is modulated into linearly polarized light by the polarization module, and meanwhile, the included angle between the plane where the light splitting delay module is located and the plane where the plane reflection module is located is set to be between 30 degrees and 60 degrees, namely, the augmented reality display system of the embodiment has the advantages of small volume and compact structure through folding of the light path, and is beneficial to light weight of the augmented reality display system; meanwhile, the light energy utilization rate of the image to be displayed can be improved; in addition, ghost images can be eliminated by the augmented reality display system provided by the embodiment of the application.

Drawings

Fig. 1 is a schematic structural diagram of an augmented reality display system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of an augmented reality display device according to an embodiment of the present application.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of an augmented reality display system provided in an embodiment of the present application, and as shown in fig. 1, an augmented reality display system 100 provided in an embodiment of the present application includes: the device comprises a display module 10, a light converging module 20, a polarization module 30, a light splitting delay module 40, a plane reflection module 50 and a curved surface reflection module 60; the light converging module 20 is configured to converge light emitted by the display module 10; the polarization module 30 is configured to modulate the converged light into polarized light in a first direction or polarized light in a second direction; the beam splitting delay module 40 is configured to transmit polarized light in a first direction, reflect polarized light in a second direction, and convert the polarized light in the first direction into elliptically polarized light, so that the elliptically polarized light is incident to the plane reflection module 50; the plane reflection module 50 is used for reflecting the elliptically polarized light to the light splitting delay module; the light splitting delay module 40 is further configured to convert the elliptically polarized light into polarized light in the second direction, and then convert the polarized light in the second direction into elliptically polarized light and enter the curved surface reflection module 60; the curved surface reflection module 60 is configured to reflect the elliptically polarized light to the spectroscopic delay module 40; the light splitting delay module 40 is further configured to modulate the elliptically polarized light into polarized light in a first direction and then enter human eyes to form a virtual image; the curved surface reflection module 60 is used for transmitting external light rays, and then the external light rays enter human eyes through the light splitting delay module 40 to form a real object image; the plane where the spectral delay module 40 is located and the plane where the plane reflection module 50 is located form a first included angle α, and the first included angle α is greater than or equal to 30 ° and less than or equal to 60 °.

The Display module 10 may include, for example, an Organic Light-Emitting Diode (OLED) Display panel, a Liquid Crystal Display (LCD), a matrix Liquid Crystal On Silicon (LCOS) Display panel, a Digital Light Processing (DLP) Display, and the like. It should be noted that the type of the display module 10 includes, but is not limited to, the above examples, and those skilled in the art can select the type according to the actual situation. The size of the display module 10 can be, for example, between 0.1 inch and 2 inches, so as to ensure a smaller size and reduce the volume of the augmented reality display system, thereby making the augmented reality display system lightweight. The resolution of the display module 10 is greater than 720P, for example, to ensure the display effect of the augmented reality display system.

The light converging module 20 may be composed of a plurality of lenses, and at least includes a negative lens and a positive lens, so that even if the field angle is large, the optical effect is good and the chromatic aberration is small. In the present embodiment, the absolute value of the focal length of the combination of the plurality of lenses is, for example, 10mm to 35 mm.

The polarizing module 30 includes an optical device having a polarization selection effect, and may be a polarizing plate, for example.

The first direction polarized light may be P light, and correspondingly, the second direction polarized light is S light; alternatively, the first direction polarized light may be S light, and correspondingly, the second direction polarized light may be P light.

In this embodiment, the light emitted by the display module 10 is converged by the light converging module 20, and then the converged light is modulated into polarized light in the first direction or polarized light in the second direction by the polarizing module 30, and an included angle between the plane where the light splitting delay module 40 is located and the plane where the plane reflection module 50 is located is set between 30 ° and 60 °, that is, the augmented reality display system of this embodiment has a smaller volume and a compact structure due to the folding of the light path, and is beneficial to the light weight of the augmented reality display system 100; meanwhile, the light energy utilization rate of the image to be displayed can be improved, and ghost images can be eliminated. In addition, the augmented reality display system 100 provided by the embodiment can also simultaneously satisfy the conditions of the optical system, such as the field of view, the exit pupil distance, the large exit pupil diameter, and the short focal length.

Optionally, with continued reference to fig. 1, the light converging module 20 is integrated with the polarizing module 30. For example, the polarization module 30 may be disposed on the surface of the light converging module 20. By integrating the light converging module 20 and the polarization module 30, the volume of the augmented reality display system 100 can be further reduced, which is beneficial to the light weight of the augmented reality display system 100.

Optionally, fig. 2 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application, and as shown in fig. 2, the light converging module 20 includes at least one negative lens 21 and one positive lens 22; the polarizing module 30 includes a polarizing plate; the polarizing plate is located on the surface of the negative lens 21 or the positive lens 22, i.e., the polarizing plate is located on the surface of a certain lens. Fig. 2 illustrates an example in which a polarizing plate is provided on one surface of the negative lens 21.

In this embodiment, the light converging module 20 includes at least one negative lens 21 and one positive lens 22, that is, a combination of the positive and negative lenses, so that the augmented reality display system 100 provided by this embodiment has a good optical effect and a small chromatic aberration when having a large field angle; further, by attaching a polarizer to a surface of a certain lens, the volume of the augmented reality display system 100 may be reduced compared to when the polarizing module 30 and the light converging module 20 are separately provided.

Optionally, with reference to fig. 1, a normal of the spectroscopic delay module 40 and a normal of the curved surface reflection module 60 form a second included angle β, and the second included angle β is greater than or equal to 30 ° and less than or equal to 60 °. The advantage of setting up like this is on guaranteeing that the light beam propagates and energy loss is less basis, can make augmented reality display system 100 of this embodiment further reduce in size, and compact structure is favorable to augmented reality display system 100's lightweight.

Optionally, with continued reference to fig. 1, the normal of the light converging module 20 is parallel to the normal of the planar reflecting module 50; the optical axis of the light converging module 20 is perpendicular to the plane of the plane reflection module 50; the normal of the light converging module 20 coincides with the normal of the display module 10. Through the reasonable arrangement of the display module 10, the light converging module 20 and the plane reflection module 50, on the basis of ensuring light beam propagation and small energy loss, the augmented reality display system of the embodiment can be further reduced in size and compact in structure, and the light weight of the augmented reality display system 100 is facilitated.

Optionally, with continued reference to fig. 1, the planar reflective module 50 includes a third surface 51 and a fourth surface 52; the third surface 51 is an optical plane; the third surface 51 is provided with a total reflection film; the fourth surface 52 may be a surface of any shape, for example, a spherical surface, an aspherical surface, or the like.

Specifically, the elliptically polarized light emitted from the spectral delay module 40 enters the plane reflection module 50, and when the third surface 51 is coated with the total reflection film, the elliptically polarized light is reflected to the spectral delay module 40 on the third surface 51.

Optionally, fig. 3 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application, and as shown in fig. 3, the planar reflection module 50 includes a third surface 51 and a fourth surface 52; the third surface 51 and the fourth surface 52 are both optical planes; optionally, the augmented reality display system 100 further includes a second antireflection film 70; third surface 51 is provided with second antireflection film 70 and fourth surface 52 is provided with a total reflection film.

Specifically, the elliptically polarized light emitted from the spectral delay module 40 enters the plane reflection module 50, and when the third surface 51 is provided with the second antireflection film 70 and the fourth surface 52 is plated with the total reflection film, the elliptically polarized light passes through the third surface 51, is then reflected at the fourth surface 52, and then passes through the third surface 51 to leave the plane reflection module 50. The second antireflection film 70 may be provided to increase the light transmission amount and reduce or eliminate stray light. Optionally, with continued reference to fig. 1, the curved reflective module 60 includes a fifth surface 61 and a sixth surface 62; the fifth surface 61 and the sixth surface 62 are the same aspheric surface, and may be a special effect aspheric surface, for example; the sixth surface 62 is provided with a light splitting film; alternatively, the fifth surface 61 is provided with a spectroscopic film.

Optionally, with continued reference to fig. 1, augmented reality display system 100 further includes a third antireflection film 80; the third antireflection film 80 is located on the fifth surface 61, and the sixth surface 62 is provided with a spectroscopic film.

The elliptically polarized light emitted from the light splitting delay module 40 reaches the curved surface reflection module 60 after being emitted, when the fifth surface 61 is plated with the third antireflection film 80 and the sixth surface 62 is plated with the light splitter, the elliptically polarized light passes through the fifth surface 61, is partially reflected and partially transmitted on the sixth surface 62, and finally leaves the curved surface reflection module 60 through the fifth surface 61. In addition, the external light is partially reflected and partially transmitted at the sixth surface 62, and the transmitted light leaves the curved reflective module 60 through the fifth surface 61. The third antireflection film 80 may be provided to increase the light transmittance and reduce or eliminate stray light.

Optionally, fig. 4 is a schematic structural diagram of another augmented reality display system provided in the embodiment of the present application, and as shown in fig. 4, the augmented reality display system 100 further includes a third antireflection film 80; the third antireflection film 80 is located on the sixth surface 62, and the fifth surface 61 is provided with a spectroscopic film.

The elliptical polarized light emitted by the light splitting delay module 40 reaches the curved surface reflection module 60 after being emitted, and when the fifth surface 61 is plated with the light splitter and the sixth surface 62 is plated with the third antireflection film 80, the elliptical polarized light is partially reflected and partially transmitted on the fifth surface 61. In addition, the external light enters the curved reflective module 60 through the sixth surface 62, is partially reflected at the fifth surface 61, is partially transmitted, and exits the curved reflective module 60 through the fifth surface 61. The third antireflection film 80 may be provided to increase the light transmission amount and reduce or eliminate stray light.

Optionally, the thickness between the fifth surface 61 and the sixth surface 62 is greater than or equal to 1mm and less than or equal to 5mm. The advantage of this arrangement is that it can ensure the lightness of the curved surface reflection module 60, and is beneficial to the processing of the curved surface reflection module 60.

Optionally, fig. 5 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application, and as shown in fig. 5, the light splitting retardation module 40 includes a light splitter 41, a polarizing reflective film 42, and a phase retardation plate 43; optionally, a first antireflection film 44 may be further included, and by providing the first antireflection film 44, the light transmission amount may be increased, and stray light may be reduced or eliminated; the beam splitter 41 comprises a first surface 411 and a second surface 412, the phase retarder 43 is located on the first surface 411, and the polarization reflection film 42 is located on the side, away from the first surface 411, of the phase retarder 43; when first antireflection film 44 is included, first antireflection film 44 may be located on second surface 412; the polarizing reflective film 42 is used for transmitting the first direction polarized light and reflecting the second direction polarized light; the phase retarder 43 is configured to convert the polarized light in the first direction into elliptically polarized light, and the elliptically polarized light enters the first surface 411, passes through the beam splitter 41, the second surface 412, and the first antireflection film 44, and then enters the plane reflection module 50; the elliptical polarization light source is also used for converting elliptical polarization light which sequentially passes through the plane reflection module 50, the first antireflection film 44, the second surface 412, the beam splitter 41 and the first surface 411 into polarized light in the second direction and then is incident to the polarization reflection film 42; the polarization reflection film 42 is used for reflecting the polarized light in the second direction to the phase retarder 43; the phase retarder 43 is further configured to convert the polarized light in the second direction into elliptically polarized light, so that the elliptically polarized light enters the curved reflection module 60 after passing through the first surface 411, the beam splitter 41, and the second surface 412.

Illustratively, light emitted by the display module 10 is converged by the light converging module 20, and if the polarization module 30 is integrated in the light converging module 20, because the polarization module 30 is included in the light converging module 20, the light passing through the light converging module 20 becomes linearly polarized light, which may be polarized light in a first direction or polarized light in a second direction, where the polarized light in the first direction may be P light, and correspondingly, the linearly polarized light in the second direction is S light; alternatively, the first-direction polarized light may be S light, and correspondingly, the second-direction polarized light may be P light; the first direction polarized light is taken as P light as an example.

The polarization reflection film 42 on the first surface 411 is used for transmitting the P light and reflecting the S light, the light is the P light, and enters the phase retardation film 42 into the phase retardation film 43, the phase retardation film 43 may be a quarter wave plate, for example, because of the phase retardation of the quarter wave plate, the light leaves the quarter wave plate and is changed from the P light to an elliptical light, enters the beam splitter 41 through the first surface 411, and then leaves the beam splitter 41 through the first surface 412. Then, the light reaches the plane reflection module 50, and when the third surface 51 is coated with a total reflection film, the light is reflected on the third surface 51; when the third surface 51 is coated with the second antireflection film 70 and the fourth surface 52 is coated with the total reflection film, the light passes through the third surface 51, is then reflected at the fourth surface 52, and then exits the planar reflection module 50 through the third surface 51.

The light reflected by the plane reflection module 50 is still elliptically polarized light, the light enters the beam splitter 41 from the second surface 412, then reaches the quarter-wave plate through the first surface 411, the light passes through the quarter-wave plate again, when leaving the quarter-wave plate, the light is changed into S light, because the polarization reflection film 42 of the first surface 411 is P light transmission S light reflection, the light is reflected at the polarization reflection film 42 and enters the quarter-wave plate, because the phase delay of the quarter-wave plate, the light leaves the wave plate and is changed into elliptically polarized light from the S light, then the light enters the beam splitter 41 through the first surface 411, and then the light leaves the beam splitter 41 through the second surface 412. The light reaches the curved surface reflection module 60, and when the fifth surface 61 is plated with the light splitting film, the light is partially reflected and partially transmitted on the fifth surface 61; when the fifth surface 61 is coated with the third antireflection film 80 and the sixth surface 62 is coated with the light splitting film, light passes through the fifth surface 61, is partially reflected and partially transmitted by the sixth surface 62, and then exits the curved surface reflection module 60 through the fifth surface 61.

The light reflected by the curved surface reflection module 60 is still elliptically polarized light, the light enters the spectroscope 41 from the second surface 412, then passes through the first surface 411 to the quarter-wave plate, the light passes through the quarter-wave plate again, when leaving the quarter-wave plate, the light is changed into P light, because the polarization reflection film 42 on the first surface 411 is the P light transmission S light reflection, the light passes through the polarization reflection film 42, and finally enters human eyes to form a virtual image.

The external light enters the curved surface reflection module 60 through the sixth surface 62, then leaves the curved surface reflection module 60 through the fifth surface 61 (when the fifth surface 61 is coated with the third antireflection film 80, and the sixth surface 62 is coated with the spectroscopic film, the light is partially reflected and partially transmitted on the sixth surface 62, and the transmitted light leaves the curved surface reflection module 60 through the fifth surface 61; when the fifth surface 61 is coated with the spectroscopic film and the sixth surface 62 is coated with the third antireflection film 80, the light is partially reflected and partially transmitted at the fifth surface 61 after passing through the sixth surface 62, and the transmitted light leaves the curved surface reflection module 60 through the fifth surface 61), then passes through the light splitting delay module 40, and finally enters human eyes to form a real object image, and the superposition of the virtual image and the real object image achieves the effect of augmented reality.

Optionally, fig. 6 is a schematic structural diagram of another augmented reality display system provided in the embodiment of the present application, and as shown in fig. 6, the beam splitting retardation module 40 includes a beam splitter 41, a polarization reflective film 42, and a phase retardation plate 43; optionally, the spectral retardation module 40 further includes a first antireflection film 44, wherein the phase retardation plate 43 may be, for example, a quarter-wave plate; when the spectroscopic retardation module 40 includes the first antireflection film 44, the first antireflection film 44 is located on the first surface 411, the polarization reflection film 42 is located on the second surface 412, and the phase retardation plate 43 is located on the side of the polarization reflection film 42 away from the second surface 412; the polarization reflection film 42 is used for transmitting the polarized light in the first direction after passing through the first antireflection film 44, the first surface 411, the beam splitter 41 and the second surface 412 in sequence and reflecting the polarized light in the second direction, so that the polarized light in the first direction is incident to the phase retarder 43; the phase retarder 43 is used for converting the polarized light in the first direction into elliptically polarized light and enabling the elliptically polarized light to be incident on the plane reflection module 50; and is further configured to convert the elliptically polarized light sequentially reflected by the plane reflection module 50 into polarized light of the second direction, so that the polarized light of the second direction is incident to the polarization reflection film 42; the polarizing reflective film 42 is also used to reflect the second-direction polarized light to the phase retarder 43; the phase retarder 43 is further configured to convert the second-direction polarized light into elliptically polarized light, so that the elliptically polarized light is incident on the curved reflection module 60.

Exemplarily, light emitted by the display module 10 is converged by the light converging module 20, and if the polarization module 30 is integrated in the light converging module 20, since the light converging module 20 includes the polarization module 30, the light passing through the light converging module 20 is changed into linearly polarized light, which may be polarized light in a first direction or polarized light in a second direction, where the polarized light in the first direction may be P light, and correspondingly, the polarized light in the second direction is S light; alternatively, the first-direction polarized light may be S light, and correspondingly, the second-direction polarized light may be P light; the first direction polarized light is taken as P light as an example.

The P light enters the beam splitter 41 from the first surface 411, and then enters the film layer through the second surface 412, at this time, the polarization reflection film 42 on the second surface 412 transmits the S light for the P light to reflect, and the light ray enters the quarter-wave plate through the polarization reflection film 42 for the P light, because of the phase delay of the quarter-wave plate, the light ray changes from the P light to the elliptically polarized light after leaving the wave plate. Then, the light reaches the plane reflection module 50, and when the third surface 51 is coated with the total reflection film, the light is reflected on the third surface 51; when the third surface 51 is coated with the second antireflection film 70 and the fourth surface 52 is coated with the total reflection film, the light passes through the third surface 51, is then reflected at the fourth surface 52, and then exits the planar reflection module 50 through the third surface 51.

The light reflected by the planar reflection module 50 is still elliptically polarized light, the light passes through the quarter-wave plate again, the light is changed into S light when leaving the quarter-wave plate, the light is reflected at the polarization reflection film 42 and enters the quarter-wave plate because the polarization reflection film 42 on the second surface 412 transmits the S light for the P light, and the light is changed into elliptically polarized light from the S light after leaving the quarter-wave plate because of the phase delay of the quarter-wave plate, and then the light reaches the curved surface reflection module 60. When the fifth surface 61 is plated with the spectroscopic film, light is partially reflected and partially transmitted on the fifth surface 61; when the fifth surface 61 is coated with the third antireflection film 80 and the sixth surface 62 is coated with the light splitting film, light passes through the fifth surface 61, is partially reflected and partially transmitted by the sixth surface 62, and then exits the curved surface reflection module 60 through the fifth surface 61.

The light reflected by the curved surface reflection module 60 is still elliptically polarized light, the light passes through the quarter wave plate again, when leaving the quarter wave plate, the light is changed into P light, because the polarization reflection film 42 on the second surface 412 is P light transmission S light reflection, the light passes through the polarization reflection film 42, enters the spectroscope 41 from the second surface 412, then leaves the spectroscope 41 through the first surface 411, and finally enters human eyes, so as to form a virtual image.

The light reflected by the curved surface reflection module 60 is still elliptically polarized light, the light enters the spectroscope 41 from the second surface 412, then passes through the first surface 411 to the quarter-wave plate, the light passes through the quarter-wave plate again, when leaving the quarter-wave plate, the light is changed into P light, because the polarization reflection film 42 on the first surface 411 is the P light transmission S light reflection, the light passes through the polarization reflection film 42, and finally enters human eyes to form a virtual image.

The external light enters the curved surface reflection module 60 through the sixth surface 62, and then leaves the curved surface reflection module 60 through the fifth surface 61 (when the fifth surface 61 is coated with the third antireflection film 80 and the sixth surface 62 is coated with the spectroscopic film, the light is partially reflected and partially transmitted on the sixth surface 62, and the transmitted light leaves the curved surface reflection module 60 through the fifth surface 61; when the fifth surface 61 is coated with the spectroscopic film and the sixth surface 62 is coated with the third antireflection film 80, the light is partially reflected and partially transmitted at the fifth surface 61 after passing through the sixth surface 62, and the transmitted light leaves the curved surface reflection module 60 through the fifth surface 61), then passes through the beam splitting delay module 40, and finally enters the human eye, so as to form an image of a real object. The superposition of the virtual image and the real image achieves the effect of augmented reality.

It should be noted that, when the spectroscopic delay module 40 includes the spectroscope 41, the polarization reflection film 42 and the phase retardation plate 43, the positions of the spectroscope 41, the polarization reflection film 42 and the phase retardation plate 43 include but are not limited to the above examples, and those skilled in the art can set the positions of the spectroscope 41, the polarization reflection film 42 and the phase retardation plate 43 respectively according to actual situations. For example, fig. 7 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application, and as shown in fig. 7, a beam splitting retardation module 40 includes a beam splitter 41, a polarizing reflective film 42, and a phase retardation plate 43; the retardation plate 43 is located on the first surface 411 of the beam splitter 41, and the polarization reflection film 42 is located on a side of the retardation plate 43 opposite to the first surface 411. For example, fig. 8 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application, and as shown in fig. 8, a beam splitting retardation module 40 includes a beam splitter 41, a polarizing reflective film 42, and a phase retardation plate 43; the polarizing reflective film 42 is disposed on a first surface 411 of the beam splitter 41, and the phase retarder 43 is disposed on a second surface 412 of the beam splitter 41. For example, fig. 9 is a schematic structural diagram of another augmented reality display system provided in an embodiment of the present application, and as shown in fig. 9, the beam splitting retardation module 40 includes a beam splitter 41, a polarizing reflective film 42, and a phase retardation plate 43; the polarizing reflective film 42 is disposed on the second surface 412 of the beam splitter 41, and the phase retarder 43 is disposed on a side of the polarizing reflective film 42 facing away from the second surface 412 of the beam splitter 41. On this basis, optionally, when the spectral retardation module 40 further includes a first antireflection film 44, in fig. 7, the first antireflection film 44 may be located on a side of the polarization reflection film 42 facing away from the phase retardation plate 43, or on the second surface 412 of the beam splitter 41; in fig. 8, the first antireflection film 44 may be located on the side of the polarization reflection film 42 facing away from the first surface 411 of the beam splitter 41, or on the side of the phase retardation plate 43 facing away from the second surface 412 of the beam splitter 41; in fig. 9, the first antireflection film 44 may be located on the first surface 411 of the beam splitter 41, or on the side of the phase retardation plate 43 facing away from the polarization reflection film 42.

Based on the same inventive concept, the embodiment of the application further provides an augmented reality display device, which comprises the augmented reality display system of any one of the embodiments. For example, fig. 10 is a schematic structural diagram of an augmented reality display device provided in an embodiment of the present application, and as shown in fig. 10, an augmented reality display device 1000 includes the augmented reality display system 100 in the foregoing embodiment, so that the augmented reality display device 1000 provided in the present embodiment also has the beneficial effects described in the foregoing embodiment, and details are not repeated here. For example, the Augmented Reality display apparatus 1000 may be an Augmented Reality display apparatus such as an AR (Augmented Reality) display device. The AR display device may be, for example, AR glasses, and it is understood that the AR glasses further include some elements having functions of connecting, fixing, assembling, and wearing the augmented reality display system 100, which is not limited herein.

It is to be noted that the foregoing is only illustrative of the presently preferred embodiments and application of the principles of the present invention. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims (10)

1. An augmented reality display system, comprising: the device comprises a display module, a light converging module, a polarization module, a light splitting delay module, a plane reflection module and a curved surface reflection module;

the light converging module is used for converging the light emitted by the display module;

the polarization module is used for modulating the converged light into polarized light in a first direction or polarized light in a second direction;

the light splitting delay module is used for transmitting polarized light in a first direction, reflecting polarized light in a second direction, and converting the polarized light in the first direction into elliptically polarized light so that the elliptically polarized light is incident to the plane reflection module;

the plane reflection module is used for reflecting the elliptical polarized light to the light splitting delay module;

the light splitting delay module is also used for converting the elliptical polarized light into polarized light in a second direction, and then converting the polarized light in the second direction into elliptical polarized light to be incident to the curved surface reflection module;

the curved surface reflection module is used for reflecting the elliptical polarized light to the light splitting delay module;

the light splitting delay module is also used for modulating the elliptical polarized light into polarized light in a first direction and then enabling the polarized light to enter human eyes to form a virtual image;

the curved surface reflection module is used for transmitting external light rays and then enabling the external light rays to enter human eyes through the light splitting delay module to form a real object image;

the plane where the light splitting delay module is located and the plane where the plane reflection module is located form a first included angle, and the first included angle is larger than or equal to 30 degrees and smaller than or equal to 60 degrees.

2. The augmented reality display system of claim 1, wherein the light converging module is integrally disposed with the polarizing module.

3. The augmented reality display system of claim 2, wherein the light converging module comprises at least one negative lens and one positive lens;

the polarizing module includes a polarizing plate;

the polarizing plate is located on a surface of the negative lens or the positive lens.

4. The augmented reality display system of claim 1, wherein a normal of the beam splitting delay module and a normal of the curved reflection module form a second included angle, and the second included angle is greater than or equal to 30 ° and less than or equal to 60 °.

5. The augmented reality display system of claim 1, wherein a normal of the light converging module and a normal of the planar reflecting module are parallel;

the optical axis of the light ray convergence module is vertical to the plane of the plane reflection module;

and the normal of the light ray convergence module is coincident with the normal of the display module.

6. The augmented reality display system of claim 1, wherein the beam splitting delay module comprises a beam splitter, a polarizing reflective film, and a phase retarder;

the spectroscope comprises a first surface and a second surface, the phase retarder is positioned on the first surface, and the polarizing reflection film is positioned on one side, away from the first surface, of the phase retarder;

the polarization reflection film is used for transmitting polarized light in a first direction and reflecting polarized light in a second direction;

the phase retarder is used for converting the polarized light in the first direction into elliptical polarized light, the elliptical polarized light is incident to the first surface, passes through the spectroscope and the second surface and then is incident to the plane reflection module; the elliptical polarized light sequentially passes through the plane reflection module, the second surface, the spectroscope and the first surface is converted into polarized light in a second direction and then is incident to the polarization reflection film;

the polarization reflection film is used for reflecting the polarized light in the second direction to the phase retarder;

the phase retarder is further configured to convert the polarized light in the second direction into elliptically polarized light, so that the elliptically polarized light enters the curved surface reflection module after passing through the first surface, the beam splitter and the second surface.

7. The augmented reality display system of claim 1, wherein the beam splitting delay module comprises a beam splitter, a polarizing reflective film, and a phase retarder;

the spectroscope comprises a first surface and a second surface, the polarizing reflection film is positioned on the second surface, and the phase retarder is positioned on the side, away from the second surface, of the polarizing reflection film;

the polarization reflection film is used for transmitting the polarized light in the first direction after sequentially passing through the first surface, the spectroscope and the second surface and reflecting the polarized light in the second direction so as to enable the polarized light in the first direction to be incident to the phase retarder;

the phase retarder is used for converting the polarized light in the first direction into elliptical polarized light and enabling the elliptical polarized light to be incident to the plane reflection module; the plane reflection module is used for reflecting the elliptical polarized light to the elliptical polarized light source and converting the elliptical polarized light sequentially reflected by the plane reflection module into polarized light in a second direction so that the polarized light in the second direction is incident to the polarization reflection film;

the polarization reflection film is also used for reflecting the polarized light in the second direction to the phase retarder;

the phase retarder is further used for converting the polarized light in the second direction into elliptically polarized light so that the elliptically polarized light is incident to the curved surface reflection module.

8. The augmented reality display system of claim 1, wherein the planar reflection module comprises a third surface and a fourth surface;

the third surface and the fourth surface are both optical planes, and the augmented reality display system further comprises a second antireflection film; the third surface is provided with the second antireflection film, and the fourth surface is provided with a total reflection film; alternatively, the first and second electrodes may be,

the third surface is an optical plane and is provided with a total reflection film.

9. The augmented reality display system of claim 1,

the curved surface reflection module comprises a fifth surface and a sixth surface; the fifth surface and the sixth surface are the same aspheric surface;

the sixth surface is provided with a light splitting film; alternatively, the first and second electrodes may be,

the fifth surface is provided with a light splitting film.

10. An augmented reality display apparatus comprising the augmented reality display system of any one of claims 1 to 9.

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