CN217954844U - Near-to-eye display device and wearable equipment - Google Patents

Abstract

The utility model is suitable for an optics technical field provides a nearly eye display device and wearing equipment. The near-eye display device comprises a micro display, a first doublet-cemented lens, a polarization beam splitter prism, a second doublet-cemented lens, a first plano-convex lens and an illumination module positioned on one side of the polarization beam splitter prism, wherein the micro display, the first doublet-cemented lens, the polarization beam splitter prism, the second doublet-cemented lens and the first plano-convex lens are sequentially arranged along a first direction; the micro display comprises an LCOS display chip, wherein the LCOS display chip is used for displaying a virtual image, receiving and reflecting light rays so that the light rays carry all image information carried by the virtual image and change the polarization state of the light rays; the first cemented doublet and the second cemented doublet both have positive focal power and are respectively cemented by a positive lens and a negative lens; the illumination module is used for providing illumination light with a first polarization state. The utility model provides a near-to-eye display device and wearing equipment, small, contrast height, display effect are good.

Description

Near-to-eye display device and wearable equipment

Technical Field

The utility model belongs to the technical field of optics, especially, relate to a nearly eye display device and wearing equipment.

Background

In recent years, augmented Reality (AR) technology is rapidly developed, virtual images are overlaid on a real world perceived by a user by the technology, vivid experience can be created, and the technology has a great application prospect in the aspects of military affairs, security, industry, medical treatment and the like. In the conventional AR optical system, the microdisplay source mainly includes LCOS (Liquid Crystal on Silicon), LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), DLP (Digital Light processing), micro-led (Micro Light Emitting Diode), and the like. The LCOS is a novel reflective display technology in which an LCD and a CMOS (Complementary Metal Oxide Semiconductor) integrated circuit are organically combined, inherits the advantages of the LCD, overcomes the disadvantages of the LCD, and is an optimal solution currently applied to the AR field. However, since the LCOS is a passive light emitting device, developers need to design an additional illumination system to provide illumination for the LCOS, so that the volume of the whole optical system is increased, and the LCOS has different responses to the polarized lights with different angles incident on its surface, so that when the stray light with larger angles in the illumination system is incident on the LCOS, the contrast of the whole system is reduced, thereby reducing the display effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a near-to-eye display device and wearing equipment aims at solving among the prior art near-to-eye display device bulky, the contrast is low, the poor technical problem of display effect.

The present invention is achieved as such, and in a first aspect, provides a near-to-eye display device, including a micro display, a first doublet lens, a polarization splitting prism, a second doublet lens, and a first plano-convex lens, which are sequentially arranged along a first direction, and an illumination module located on one side of the polarization splitting prism; the micro display comprises an LCOS display chip, and the LCOS display chip is used for displaying a virtual image, receiving and reflecting light rays so that the light rays carry all image information carried by the virtual image and change the polarization state of the light rays; the first double cemented lens and the second double cemented lens both have positive focal power and are respectively cemented by a positive lens and a negative lens; the polarization beam splitter prism is used for reflecting the light in the first polarization state and transmitting the light in the second polarization state; the illumination module is used for providing illumination light with a first polarization state;

the illumination light can be reflected by the polarization beam splitter prism, then irradiated onto the LCOS display chip through the first double cemented lens, and reflected by the LCOS display chip to form image light, wherein the image light has a second polarization state and can sequentially pass through the first double cemented lens, the polarization beam splitter prism, the second double cemented lens and the first plano-convex lens to correct aberration and emit after amplification.

In an optional embodiment, the illumination module comprises an illumination light source and a polarizer, which are sequentially arranged along a second direction perpendicular to the first direction, the illumination light source is used for emitting first light, and the polarizer is used for receiving the first light and modulating the first light into the illumination light.

In an optional embodiment, the illumination light source includes a light uniformizing assembly, and a green light source, a red light source and a blue light source surrounding the light uniformizing assembly, and the light uniformizing assembly is configured to receive light emitted by the green light source, the red light source and the blue light source, and emit the three light rays uniformly to form the first light ray.

In an optional embodiment, the light uniformizing assembly includes a light guide plate, the light guide plate has a first plate surface and a second plate surface opposite to the first plate surface, a diffuse reflection structure is disposed on the first plate surface, a light uniformizing and brightness enhancing film is attached to the second plate surface, and the green light source, the red light source and the blue light source are disposed around a sidewall of the light guide plate.

In an alternative embodiment, the polarization splitting prism comprises a first prism and a second prism which are arranged in sequence; the oblique edge face of the first prism is glued with the oblique edge face of the second prism, a semi-transparent semi-reflective dielectric film is plated on the glued face to form a light splitting face of the polarization light splitting prism, and the light splitting face is arranged at an angle of 45 degrees with the first direction and the second direction respectively.

In an optional embodiment, an area of a light emitting surface of the illumination light source is less than or equal to 15mm ² 。

In an alternative embodiment, the first cemented double lens includes a first plano-concave lens and a double convex lens arranged in this order in a first direction, the first plano-concave lens is arranged close to the microdisplay, and a radius of curvature of a convex surface of the double convex lens for cementing with the first plano-concave lens is smaller than that of the other convex surface.

In an alternative embodiment, the second cemented double lens includes a second plano-concave lens and a plano-convex lens sequentially arranged along the first direction, the second plano-concave lens is cemented with a plane of the plano-convex lens, the second plano-concave lens is arranged near the polarization splitting prism, and a radius of curvature of the second plano-concave lens is smaller than a radius of curvature of the plano-convex lens.

In an optional embodiment, the near-eye display device further comprises a diaphragm disposed on the light exit side of the first plano-convex lens.

In a second aspect, a wearable device is provided, which includes the near-eye display device provided in the above embodiments.

Compared with the prior art, the utility model the technical effect be: the embodiment of the utility model provides a near-to-eye display device and wearing equipment, include the micro display, first pair cemented lens, polarization beam splitter prism, second pair cemented lens and the first plano-convex lens that set gradually along the first direction to and be located the illumination module of polarization beam splitter prism one side, illumination module, polarization beam splitter prism, first pair cemented lens form lighting system, micro display, first pair cemented lens, polarization beam splitter prism, second pair cemented lens and first plano-convex lens form imaging system. Wherein the first cemented doublet and the polarization splitting prism are optical elements common to the illumination system and the imaging system. The embodiment of the utility model provides a nearly eye display device and wearing equipment have carried out the coincidence design with the partial optical element among lighting system and the imaging system, can effectively reduce optical system and holistic volume and weight among the nearly eye display device, improve light efficiency and contrast, and then promote display effect, reduce cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a near-eye display device according to an embodiment of the present invention;

FIG. 2 is a schematic front view of the near-eye display device of FIG. 1, wherein the dashed arrows indicate the propagation direction of illumination light and the solid arrows indicate the propagation direction of image light;

fig. 3 is a schematic structural diagram of an illumination light source used in the embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of the near-eye display device of FIG. 1;

fig. 5 is a schematic cross-sectional view of a near-eye display device according to another embodiment of the present invention.

Description of reference numerals:

100. a microdisplay; 200. a first cemented doublet lens; 210. a first plano-concave lens; 220. a lenticular lens; 300. a polarization splitting prism; 310. a first prism; 320. a second prism; 330. a light splitting surface; 400. a second cemented doublet lens; 410. a second plano-concave lens; 420. a plano-convex lens; 500. a first plano-convex lens; 600. an illumination module; 610. an illumination light source; 611. a light guide plate; 612. a diffuse reflective structure; 613. a light-homogenizing brightness enhancement film; 614. a green light source; 615. a red light source; 616. a blue light source; 620. a polarizer; 700. a diaphragm; x, a first direction; y, second direction.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, 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 to implicitly indicate 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. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, in an embodiment of the present invention, a near-eye display device is provided, which includes a microdisplay 100, a first doublet lens 200, a polarization splitting prism 300, a second doublet lens 400, and a first plano-convex lens 500 sequentially arranged along a first direction X, and an illumination module 600 located at one side of the polarization splitting prism 300. Specifically, the illumination module 600 and the polarization splitting prism 300 are arranged in a second direction Y perpendicular to the first direction X.

The microdisplay 100 comprises an LCOS display chip. The LCOS display chip is a spatial light modulator with polarization properties, which is mainly used to display a virtual image (i.e. to provide image information), and at the same time is capable of receiving and reflecting light, and during this time, making the light carry all the image information carried by the virtual image and changing the polarization state of the light.

The first cemented doublet 200 and the second cemented doublet 400 each have positive optical power. Specifically, the first cemented doublet 200 and the second cemented doublet 400 are formed by cementing a convex lens and a concave lens, wherein the concave lens is disposed close to the microdisplay 100, and the convex lens is disposed far from the microdisplay 100, and the structures of the two cemented doublets can be the same or different, and can be flexibly selected according to the light emitting effect.

The polarization splitting prism 300 is used for reflecting light in a first polarization state and transmitting light in a second polarization state. Specifically, the main function of the polarization splitting prism 300 in this embodiment is to completely transmit the P-polarized light (linearly polarized light with a polarization direction parallel to the incident plane) in the second polarization state and completely reflect the S-polarized light (linearly polarized light with a polarization direction perpendicular to the incident plane) in the first polarization state.

The illumination module 600 is used for providing illumination light having a first polarization state. The illumination source 610 in this embodiment may be a small LED light source, or other light source, combined with a polarizer, as long as the above-mentioned functions can be achieved, and is not limited herein.

The first cemented doublet 200, the second cemented doublet 400, and the first plano-convex lens 500 in this embodiment are mainly used to correct aberrations and magnify and image light to infinity. The first plano-convex lens 500 is mainly used for contributing coma and distortion with positive numerical values, and the plano-convex lens 420 is easy to process, so that the processing cost can be reduced, the assembly of the whole machine is facilitated, the assembly precision is easy to guarantee, and the volume of the system can be effectively reduced.

The embodiment of the utility model provides a near-to-eye display device's work flow as follows:

in use, the illumination module 600 and the microdisplay 100 are activated, the LCOS chip in the microdisplay 100 emits a virtual image, and at the same time, the illumination module 600 emits an illumination light having a first vibration state. The illumination light is reflected by the polarization beam splitter 300, is subjected to aberration correction by the first doublet lens 200, is irradiated onto the LCOS display chip, is reflected by the LCOS display chip, and is in contact with a virtual image emitted by the LCOS display chip during the reflection so as to carry all image information thereon and change the polarization state to form image light. At this time, the polarization state of the image light is the second polarization state, and then the image light sequentially passes through the first cemented doublet 200, the polarization splitting prism 300, the second cemented doublet 400 and the first plano-convex lens 500 to be emitted, during which the aberration is corrected and amplified, and the emitted image light can be imaged to infinity.

The embodiment of the utility model provides a near-to-eye display device's theory of operation as follows:

the illumination module 600, the polarization beam splitter prism 300, and the first cemented doublet 200 in this embodiment form an illumination system, and the microdisplay 100, the first cemented doublet 200, the polarization beam splitter prism 300, the second cemented doublet 400, and the first plano-convex lens 500 form an imaging system. Among them, the first cemented doublet 200 and the polarization splitting prism 300 are optical elements common to the illumination system and the imaging system. The first cemented doublet 200 functions as follows:

in the imaging system, the first cemented doublet 200 functions as a "field lens", i.e. it can correct curvature of field, and at the same time, the element introduces positive distortion, which can cancel out the negative distortion of the second cemented doublet 400, and furthermore, the cemented doublet structure does not introduce additional spherical aberration and aberration such as chromatic aberration.

In lighting system, first doublet 200 can collect and shine on the LCOS display chip after the collimation to the light that light source 610 sent, so, both can improve the light efficiency, can incide the light collimation on the LCOS display chip simultaneously, and incident light can improve the contrast in the best working angle scope of LCOS display chip promptly, and then promotes the display effect.

The polarizing beam splitter 300 functions as follows:

the polarization splitting prism 300 can be used as an illumination prism in an illumination system to reflect illumination light to an LCOS display chip, or as an imaging prism in an imaging system to share a part of the focal length.

The advantage of this special design of the coincidence of the imaging system and the illumination system is that:

on the first hand, if the illumination light emitted from the illumination module 600 can vertically enter the LCOS display chip, the LCOS display chip can return the light as a reflector, the reflected light becomes convergent light after passing through the first cemented doublet 200, that is, the light at the light exit surface of the polarization beam splitter 300 is convergent light, according to the principle of reversible light path, the light at the light entrance surface of the polarization beam splitter 300 is divergent light, and the size of the cross section of the light bundle at the light entrance surface of the polarization beam splitter 300 and the size of the cross section of the light bundle at the light exit surface of the polarization beam splitter 300 should be equal, so that the size of the light exit surface of the illumination module 600 can be controlled by controlling the incident angle of the light entering the LCOS display chip and optimizing the relevant parameters of the polarization beam splitter 300 and the first cemented doublet 200. Therefore, the area of the light emitting surface of the illumination module 600 is reduced by designers, so that the size of an optical system in the near-eye display device can be reduced, and the optical transmission efficiency of the near-eye display device is improved.

In the second aspect, when illumination light incidents perpendicularly on the LCOS display chip, the efficiency that LCOS display chip turned into the second polarization state with light by first polarization state is the highest, consequently can improve the contrast of system, simultaneously because illumination light's emitting direction and image light's emitting direction are the vertically, and the polarization direction is also the vertically, also can improve the contrast equally, and then promote display effect. Finally, the first cemented doublet 200 and the second cemented doublet 400 combined by the positive and negative lenses and the first plano-convex lens 500 can effectively inhibit the aberrations such as spherical aberration, chromatic aberration, field curvature, distortion and the like in the system, and effectively improve the imaging quality of the system.

In a third aspect, the method for designing the imaging system and the illumination system in a coincident manner greatly reduces the volume of the system, and avoids additional cost in a multi-purpose manner.

To sum up, the embodiment of the present invention provides a near-to-eye display device, including the microdisplay 100, the first cemented lens 200, the polarization beam splitter 300, the second cemented lens 400 and the first plano-convex lens 500 that set gradually along the first direction X, and the illumination module 600 that is located the polarization beam splitter 300 one side, the illumination module 600, the polarization beam splitter 300, the first cemented lens 200 form an illumination system, and the microdisplay 100, the first cemented lens 200, the polarization beam splitter 300, the second cemented lens 400 and the first plano-convex lens 500 form an imaging system. Among them, the first cemented doublet 200 and the polarization splitting prism 300 are optical elements common to the illumination system and the imaging system. The embodiment of the utility model provides a near-to-eye display device has carried out the coincidence design with the partial optical element in lighting system and the imaging system, can effectively reduce optical system and holistic volume and weight among the near-to-eye display device, improves light efficiency and contrast, and then promotes display effect, reduce cost.

In an alternative embodiment, as shown in fig. 2, the illumination module 600 includes an illumination source 610 and a polarizer 620 sequentially arranged along a second direction Y perpendicular to the first direction X. The illumination light source 610 is used for emitting a first light. Polarizer 620 is used to receive the first light and modulate it into illumination light.

The first light in this embodiment may be a color light or a monochromatic light, and may be flexibly selected according to the use requirement. The polarizer 620 is a polarizing device, and is mainly used to modulate light incident to the polarizer 620 into linearly polarized light, and the polarization direction is determined by the polarization direction of the polarizer 620.

The workflow of the near-eye display device provided by the embodiment is as follows:

the illumination light source 610 emits a first light ray, the first light ray passes through the polarizer 620 and then becomes S-polarized light with a first polarization state, and then enters the polarization beam splitter 300 to be totally reflected, and then the illumination light ray passes through the first doublet lens 200 and then enters the LCOS display chip in the microdisplay 100, the LCOS display chip reflects the S-polarized light entering the surface thereof and converts the S-polarized light into P-polarized light with a second polarization state, and then the P-polarized light passes through the first doublet lens 200, the polarization beam splitter 300, the second doublet lens 400 and the first plano-convex lens 500 in sequence, and finally exits from the exit pupil.

The lighting module 600 adopts the structure provided by the embodiment, and has a simple structure and is convenient to assemble.

In an optional embodiment, the illumination light source is used for homogenizing light rays emitted by the three-color LED and converging the light emitting angle of the LED lamp, so that an image emitted by the near-eye display device is a color image, and the user experience is improved.

In a specific embodiment, as shown in fig. 3, the illumination source 610 includes a light uniformizing assembly and a green light source 614, a red light source 615 and a blue light source 616 surrounding the light uniformizing assembly, and the light uniformizing assembly is configured to receive the light emitted from the green light source 614, the red light source 615 and the blue light source 616 and to emit the three lights after being uniformized, so as to form a first light.

The light homogenizing assembly in this embodiment may adopt one or more light homogenizing sheets, may also adopt an assembly of the light homogenizing sheet and other optical elements (such as a brightness enhancement film, etc.), may also adopt a combined structure of glass and a light homogenizing film, etc., or other combined structures, and specifically may be flexibly selected according to a light emitting effect, which is not limited uniquely here.

The illumination light source 610 adopts the structure provided by the embodiment, and is simple in structure and convenient to assemble.

In an exemplary embodiment, as shown in fig. 3, the light uniformizing assembly includes a light guide plate 611, the light guide plate 611 has a first plate surface and a second plate surface opposite to the first plate surface, the first plate surface is provided with a diffuse reflection structure 612, the second plate surface is attached with a light uniformizing and brightness enhancing film 613, and a green light source 614, a red light source 615 and a blue light source 616 are disposed around a sidewall of the light guide plate 611.

Specifically, the light guide plate 611 may be a glass light guide plate, an acrylic/PC plate, or another plate body capable of guiding light, and may be flexibly selected according to the use requirement, which is not limited herein. The diffuse reflection structure 612 may be prepared on the first board surface by etching, spraying, or the like, or may be attached to the first board surface by using a diffuse reflection film, a diffuse reflection plate, or the like, and may be flexibly selected according to the use requirement, which is not limited herein. The light-equalizing and brightness-enhancing film 613 may be a light-equalizing film and a brightness-enhancing film stacked together, or may be a film having both a light-equalizing effect and a brightness-enhancing effect, and may be flexibly selected according to the use requirement.

The light homogenizing assembly adopts the structure provided by the embodiment, has a simple structure, can convert a side light source into a surface light source and homogenize light through the diffuse reflection structure 612, can converge the light emitting angle of each monochromatic light source, and can enhance the light effect through the light homogenizing brightness enhancement film 613.

In an optional embodiment, the light guide plate is made of glass, has high stability, is not easy to deform in a high-temperature and high-humidity environment, and can keep the illumination light source to stably work in a cold and hot environment. The single-color light sources adopt LED light sources, so that the illumination light source has the advantages of energy conservation, environmental protection, long service life, small volume and the like.

In an alternative embodiment, as shown in fig. 2, the polarization splitting prism 300 includes a first prism 310 and a second prism 320 arranged in sequence.

The inclined prism surface of the first prism 310 is bonded to the inclined prism surface of the second prism 320, and the bonded surface is plated with a semi-transparent and semi-reflective dielectric film to form a light splitting surface 330 of the polarization beam splitter prism 300, and the light splitting surface 330 is arranged at 45 degrees with respect to the first direction X and the second direction Y, respectively.

Thus, the illumination light can vertically irradiate onto the LCOS display chip after passing through the splitting plane 330, and then is vertically reflected by the LCOS display chip, so as to ensure that the near-eye display device has a sufficiently small volume and a sufficiently high contrast.

In an optional embodiment, the light emitting surface of the illumination module is less than or equal to 15mm ² . Compared with other light engines based on LCOS display chip design with the same parameters, the area of the light-emitting surface of the illumination module provided in the present embodiment is reduced by about 50%, and the design of overlapping the illumination system and the imaging system is equivalent to omitting a part of illumination system components, which also means that the volume of the whole light engine is reduced, i.e. the volume of the near-eye display device is reduced.

In an alternative embodiment, as shown in fig. 4, the first cemented double lens 200 includes a first plano-concave lens 210 and a double convex lens 220 arranged in sequence along the first direction X, the first plano-concave lens 210 is arranged near the microdisplay 100, and a radius of curvature of a convex surface (named a first convex surface for convenience of description) of the double convex lens 220 for cementing with the first plano-concave lens 210 is smaller than a radius of curvature of another convex surface (named a second convex surface for convenience of description).

Referring to fig. 4, the first plano-concave lens 210 provides negative power, and is used as a field lens of an imaging system, so that the size of all lenses in the imaging system can be effectively reduced, light can be made compact, and the volume of the imaging system can be reduced.

Referring to fig. 4, the double convex lens 220 provides positive optical power, the side with the larger curvature radius is close to the image side, and is mainly used for contributing positive curvature of field and distortion, and the side with the larger curvature radius is close to the object side, and is mainly used for joining the light rays emitted from the concave surface of the first plano-concave lens 210, so that the light rays can be corrected more compactly, and the volume of the imaging system can be effectively reduced.

The first cemented doublet 200 has a simple and compact structure, and can further reduce aberrations, and effectively reduce the volumes of the illumination system and the imaging system, thereby reducing the volume of the whole near-eye display device.

In a specific embodiment, the radius of curvature of the second convex surface of the biconvex lens is 5.52mm, the radius of curvature of the first convex surface is 12.4mm, the thickness of the biconvex lens is 2.97mm, the material is H-ZLAF89L, the radius is 4.02mm, and the thickness of the first plano-concave lens is 0.589mm, the material is H-ZF6, and the radius is 4.00mm.

In an alternative embodiment, as shown in fig. 4, the second cemented double lens 400 includes a second plano-concave lens 410 and a second plano-convex lens 420 arranged in sequence along the first direction X, the planes of the second plano-concave lens 410 and the second plano-convex lens 420 are cemented, the second plano-concave lens 410 is arranged near the polarization splitting prism 300, and the radius of curvature of the second plano-concave lens 410 is smaller than that of the second plano-convex lens 420.

Referring to fig. 4, the second plano-concave lens 410, which provides negative power and mainly contributes negative spherical aberration, astigmatism, field curvature, and distortion, can correct the aberration generated by the first cemented doublet 200.

Referring to fig. 4, the second plano-convex lens 420 provides positive optical power, and is mainly used to contribute positive spherical aberration, field curvature, and distortion, so as to control the spherical aberration and the field curvature of the imaging system within a range as small as possible, thereby improving the imaging quality.

The second cemented doublet 400 has a simple and compact structure, can further reduce aberration, and can effectively reduce the volume of the imaging system, thereby reducing the volume of the whole near-to-eye display device and improving the imaging quality.

In order to further adjust the light intensity of the light exiting through the optical system provided in the above embodiments, in an alternative embodiment, as shown in fig. 5, the near-eye display device further includes a stop 700 disposed on the light exiting side of the first plano-convex lens 500.

The utility model discloses a further embodiment provides a wearing equipment, and this wearing equipment can specifically can be selected according to the use needs is nimble for AR intelligence glasses, intelligent head hoop, intelligent face guard etc.. The wearing equipment that this embodiment provided, including the near-to-eye display device that each above-mentioned embodiment provided, can effectively reduce wearing equipment's volume and weight, improve light efficiency and contrast, and then promote display effect, reduce cost.

The foregoing is considered as illustrative only of the preferred embodiments of the invention, and not as limiting the scope of the invention in any way. Any modifications, equivalents and improvements made within the spirit and principles of the invention and other embodiments of the invention without the creative effort of those skilled in the art are intended to be included within the protection scope of the invention.

Claims (10)

1. A near-to-eye display device is characterized by comprising a micro display, a first doublet lens, a polarization beam splitter prism, a second doublet lens, a first plano-convex lens and an illumination module, wherein the micro display, the first doublet lens, the polarization beam splitter prism, the second doublet lens and the first plano-convex lens are sequentially arranged along a first direction; the micro display comprises an LCOS display chip, and the LCOS display chip is used for displaying a virtual image, receiving and reflecting light rays so that the light rays carry all image information carried by the virtual image and change the polarization state of the light rays; the first double cemented lens and the second double cemented lens both have positive focal power and are respectively cemented by a positive lens and a negative lens; the polarization beam splitter prism is used for reflecting the light in the first polarization state and transmitting the light in the second polarization state; the illumination module is used for providing illumination light with a first polarization state;

the illumination light can be reflected by the polarization beam splitter prism, then irradiated onto the LCOS display chip through the first double cemented lens, and reflected by the LCOS display chip to form image light, wherein the image light has a second polarization state and can sequentially pass through the first double cemented lens, the polarization beam splitter prism, the second double cemented lens and the first plano-convex lens to correct aberration and emit after amplification.

2. The near-eye display device of claim 1, wherein the illumination module comprises an illumination source and a polarizer sequentially arranged along a second direction perpendicular to the first direction, the illumination source being configured to emit a first light ray, and the polarizer being configured to receive the first light ray and modulate it into the illumination light ray.

3. The near-eye display device of claim 2, wherein the illumination source comprises a light uniformizing assembly and a green light source, a red light source and a blue light source surrounding the light uniformizing assembly, and the light uniformizing assembly is configured to receive light emitted by the green light source, the red light source and the blue light source and to emit the three light rays after being uniformized, so as to form the first light ray.

4. The near-eye display device of claim 3, wherein the light-homogenizing assembly comprises a light guide plate, the light guide plate has a first plate surface and a second plate surface opposite to the first plate surface, the first plate surface is provided with a diffuse reflection structure, the second plate surface is provided with a light-homogenizing brightness enhancement film, and the green light source, the red light source and the blue light source are arranged around a side wall of the light guide plate.

5. The near-eye display device of claim 2, wherein the polarization splitting prism comprises a first prism and a second prism arranged in sequence; the oblique edge face of the first prism is glued with the oblique edge face of the second prism, a semi-transparent semi-reflective dielectric film is plated on the glued face to form a light splitting face of the polarization light splitting prism, and the light splitting face is arranged at an angle of 45 degrees with the first direction and the second direction respectively.

6. The near-to-eye display device of any one of claims 2-5 wherein the area of the light emitting surface of the illumination source is less than or equal to 15mm ² 。

7. The near-eye display device of any one of claims 1-5, wherein the first cemented doublet comprises a first plano-concave lens and a biconvex lens arranged in sequence along a first direction, the first plano-concave lens being arranged proximate to the microdisplay, and a radius of curvature of a convex surface of the biconvex lens for cementing with the first plano-concave lens is smaller than a radius of curvature of the other convex surface.

8. The near-eye display device according to any one of claims 1-5, wherein the second cemented doublet comprises a second plano-concave lens and a plano-convex lens arranged in sequence along the first direction, the second plano-concave lens is cemented with a plane of the plano-convex lens, the second plano-concave lens is arranged near the polarization splitting prism, and a radius of curvature of the second plano-concave lens is smaller than a radius of curvature of the plano-convex lens.

9. The near-eye display device of any one of claims 1-5, further comprising a stop disposed on an exit side of the first plano-convex lens.

10. A wearable device comprising the near-eye display apparatus of any one of claims 1-9.

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