CN219392381U - Lighting system and display device - Google Patents

Abstract

The application provides a lighting system and display device relates to augmented reality and shows technical field. Wherein the illumination system comprises: a light source unit for emitting light of the light source to provide illumination to the display unit; a light guide comprising: the light guide unit is arranged in the irradiation area of the light source light; a first polarization unit including a plurality of first polarization beam splitters arranged at intervals along a first direction; the light source light comprises first polarized light and second polarized light, the polarization direction of the first polarized light is intersected with that of the second polarized light, the light guide unit is used for conducting the light source light to the polarization unit along the direction of conduction, and the plurality of first polarization light splitters are used for sequentially reflecting part of the first polarized light and respectively transmitting the second polarized light.

Description

Lighting system and display device

Technical Field

The application relates to the technical field of augmented reality display, in particular to a lighting system and a display device.

Background

The augmented reality near-to-eye display device is used as equipment combining reality and virtual, so that a user can perform related operations in a paravirtual environment, the human can be helped to receive information more conveniently, better cognize surrounding environment and improve working efficiency more, and the augmented reality near-to-eye display device is estimated to be most likely to replace a mobile phone to become an information interaction platform of the next generation.

The optical module is a core element of the augmented reality near-eye display device, and the optical display scheme with the highest competitiveness is the optical waveguide scheme at present, and the polarized array optical waveguide scheme is most widely applied. The core bottleneck of the polarization array optical waveguide technology is the design processing of the waveguide lens, but due to the high-precision glass cold processing technology, the accurate lamination of the laminated inclined prism, the extremely complex film system design of the surface of the laminated inclined prism and the accurate control of the thickness of tens of layers of nanometer-level films, the waveguide lens widely applied in the market can only singly couple out light for S-polarized light waves (the polarization vector is perpendicular to the plane) or P-polarized light waves (the polarization vector is in the plane), so that the light flux coupled into the waveguide lens is directly reduced by half, the light efficiency is greatly reduced, and the final incoming brightness is greatly reduced, so that the incoming brightness requirement in the operation of certain specific working occasions cannot be met.

At present, a method for obtaining a picture source with higher brightness is to additionally add an illumination system to illuminate the image source, wherein the illumination system generally comprises an illumination light source, a collimating lens, a dodging lens, a converging lens, a polarization beam splitter prism and the like, so that the whole illumination system has larger volume, and the volume and the weight of a display device for enhancing display experience are larger, thereby influencing the use experience of a user.

Disclosure of Invention

The embodiment of the application provides the following technical scheme:

a first aspect of the present application provides a lighting system comprising: a light source unit for emitting light of the light source to provide illumination to the display unit;

a light guide comprising:

the light guide unit is arranged in the irradiation area of the light source light;

a first polarizing unit including a plurality of first polarizing beam splitters arranged at intervals along a first direction;

the light source light comprises first polarized light and second polarized light, the polarization direction of the first polarized light is intersected with that of the second polarized light, the light guide unit is used for conducting the light source light to the polarization unit along the direction of conduction, and the plurality of first polarization light splitters are used for sequentially reflecting part of the first polarized light and respectively transmitting the second polarized light.

In some variation embodiments of the first aspect of the present application, the light source unit includes: a light source body;

the light homogenizing and collimating unit is arranged in the irradiation area of the light source body and is positioned between the light source body and the light guide unit.

In some variation embodiments of the first aspect of the present application, the optical waveguide further includes: a second polarizing unit disposed at an interval from the first polarizing unit in the first direction, the second polarizing unit including a plurality of second polarizing beam splitters disposed at intervals along the first direction;

a polarized light conversion unit disposed between the first and second polarization units;

the polarization conversion unit is used for converting the second polarized light transmitted by the first polarization unit into first polarized light, and the plurality of second polarization splitters are used for sequentially reflecting part of the first polarized light converted by the polarization conversion unit.

In some variations of the first aspect of the present application, the polarized light conversion unit comprises a half slide.

In some variation embodiments of the first aspect of the present application, the light guiding unit includes: at least one beam splitter;

when the light guide unit comprises at least two light splitting sheets, the at least two light splitting sheets are arranged at intervals along the first direction.

In some variation embodiments of the first aspect of the present application, the optical waveguide further includes: and a base prism extending along the first direction, wherein the at least one light splitting sheet, the plurality of first polarization light splitting sheets, the polarization light conversion unit and the plurality of second polarization light splitting sheets are respectively arranged in the base prism at respective angles.

In some variations of the first aspect of the present disclosure, the reflectivity and transmissivity of the plurality of first polarizing beamsplitters are the same; and/or the number of the groups of groups,

the reflectivity and the transmissivity of the plurality of second polarization light splitting sheets are the same.

A second aspect of the present application provides a near-eye display device comprising: a waveguide unit including coupling-in regions and coupling-out regions arranged at intervals in a first direction;

the illumination system corresponds to the coupling-in area;

a display unit for generating image light corresponding to image data according to the image data;

an optical unit disposed between a light-emitting portion of the illumination system and the display unit;

the first polarized light emitted by the illumination system is converged to the display unit through the optical unit, and the image light forms an amplified virtual image through the optical unit and enters the coupling-in region of the waveguide unit through the waveguide of the illumination system and exits from the coupling-out region.

In some variant embodiments of the second aspect of the present application, the optical unit includes: the display device comprises a first lens and a second lens, wherein the first lens and the second lens are arranged at intervals in the direction from the light guide to the display unit, a composite polarizing film is arranged on the surface of the first lens facing the second lens, and a semi-transparent and semi-reflective film is arranged on the surface of the second lens facing away from the first lens.

In some modified embodiments of the second aspect of the present application, the composite polarizing film includes a polarizing plate, a polarizing reflection film, and a quarter-phase retarder sequentially stacked on the first lens surface.

Compared with the prior art, the illumination system and the display device provided by the application have the advantages that the polarization waveguide light transmission is introduced into the illumination system, the existing polarization beam splitting prism is replaced, the light energy utilization rate can be improved, the volume and the weight of the illumination system can be greatly reduced, meanwhile, the optical unit of the display device adopts the polarization turn-back scheme, the number of lenses can be reduced by utilizing the polarization turn-back light path, the volume and the weight of the optical unit and the whole near-to-eye display device can be reduced, and the volume and the weight of the whole display device applying the illumination system can be greatly reduced, so that the display device is more suitable for being worn by a human body.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings, in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 schematically illustrates a schematic structure of an illumination system according to a first embodiment of the present utility model;

fig. 2 schematically illustrates another structural diagram of an illumination system according to a first embodiment of the present utility model;

fig. 3 schematically illustrates another structural diagram of an illumination system according to a first embodiment of the present utility model;

fig. 4 schematically illustrates a structural diagram of a display device according to a second embodiment of the present utility model;

fig. 5 schematically illustrates a schematic structural diagram of an optical unit of a display device according to a second embodiment of the present utility model;

fig. 6 schematically illustrates a schematic structure of a composite polarizing film in a display device according to a second embodiment of the utility model;

reference numerals illustrate:

the light source unit 1, the light source body 11, the light-homogenizing collimating unit 12, the light guide 2, the light guide unit 21, the first polarizing beam splitter 22, the second polarizing beam splitter 23, the polarized light conversion unit 24, the base prism 25, the waveguide unit 3, the coupling-in region 31, the coupling-out region 32, the display unit 4, the optical unit 5, the first lens 51, the composite polarizing film 511, the polarizing plate 5111, the polarizing reflection film 5112, the quarter-phase retarder 5113, the antireflection film 5114, the second lens 52, the transflective film 521, and the first direction a.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.

Example 1

Referring to fig. 1-3, an embodiment of the present utility model proposes a lighting system comprising: a light source unit 1 for emitting light source light to provide illumination to a display unit 4; a light guide 2, comprising: a light guide unit 21 disposed in an irradiation region of the light source light; and a first polarization unit including a plurality of first polarization light splitters 22 disposed at intervals along a first direction a, wherein the light source light includes a first polarized light and a second polarized light, a polarization direction of the first polarized light intersects with a polarization direction of the second polarized light, the light guiding unit 21 is configured to guide the light source light to the polarization unit, and the plurality of first polarization light splitters 22 are configured to sequentially reflect a portion of the first polarized light and transmit the second polarized light respectively.

In particular, the illumination system provided in this embodiment may be applied to, but not limited to, an augmented reality (Augmented Reality, AR) near-eye display device, and may be used to provide illumination for a display unit 4, i.e., a picture source, of the near-eye display device to obtain a picture source with higher brightness. The lighting system specifically includes: a light source unit 1 and a light guide waveguide 2, the light guide waveguide 2 including: the light guiding unit 21 and the first polarization unit, the light source unit 1 is configured to emit light source light, where the light source light includes two polarization states of first polarized light and second polarized light, and polarization directions of the first polarized light and the second polarized light intersect, for example: referring to fig. 1-3, as shown in the figures, the first polarized light may be S polarized light and the second polarized light may be P polarized light; the light guiding unit 21 is disposed in the irradiation area of the light source light, and can conduct the light source light to the polarization unit, and a uniform medium can be disposed between the light guiding unit 21 and the polarization unit, so that the light source light is conducted to the polarization unit in a straight line along the first direction a, the polarization unit includes a plurality of first polarization splitters 22 disposed at intervals along the first direction a, the first polarization splitters 22 can reflect the first polarized light and transmit the second polarized light, the transmittances of the plurality of first polarization splitters 22 can be the same respectively, and the reflectances can be the same respectively, so that uniformity of illumination provided by the illumination system can be ensured, and the number of the first polarization splitters 22 can be determined according to the transmittance of the first polarization splitters 22, and the first polarized light with a partial proportion can be reflected in turn by the plurality of first polarization splitters 22 until all or nearly all the first polarized light is emitted after being reflected, and is transmitted to the display unit 4, so as to provide sufficient illumination for the display unit 4. Wherein fig. 1-3 respectively illustrate different arrangements of the illumination system, i.e. three possible embodiments; the first direction a is indicated by the double-headed arrow a in fig. 1-3.

Specifically, the direction of the reflected first polarized light may be determined by setting the angle of the first polarizing beam splitter 22, for example: the first polarizing beam splitter 22 may be disposed at an angle of 45 degrees with respect to the light source light that is linearly transmitted to the polarizing unit along the first direction a, so that the reflected first polarized light may be transmitted to the display unit 4 along the second direction perpendicular to the first direction a.

The specific arrangement and principle of the first polarization unit are illustrated below: with the energy of the light source light being 100%, the light source light comprises 50% of first polarized light and 50% of second polarized light, referring to fig. 1, two first polarized light splitters 22 can be arranged, after the light source light passes through the first polarized light splitters 22, 25% of the first polarized light is reflected and emitted, all the second polarized light is transmitted, the remaining 25% of the first polarized light and all the second polarized light are transmitted to another first polarized light splitter 22, the remaining 25% of the first polarized light is emitted after being continuously reflected, all the second polarized light is transmitted, and the two parts of the emitted first polarized light are 25% of the light source light, so that the uniformity of the illumination light beam is ensured.

According to the above-mentioned embodiments, an illumination system is provided, wherein the light source unit 1 emits light source light, the light guide unit 21 guides the light source light to the first polarization unit, and the plurality of first polarization light splitters 22 of the first polarization unit can reflect part of the first polarized light and transmit the second polarized light at a time, so that the first polarized light is emitted to the display unit 4, and sufficient and uniform illumination is provided for the display unit 4; by introducing polarized waveguide light transmission into the illumination system and replacing the existing polarized light splitting prism, the volume and weight of the illumination system can be greatly reduced, and the volume and weight of the near-to-eye display device applying the illumination system can be greatly reduced, so that the device is more suitable for being worn by a human body.

Further, referring to fig. 1 to 3, in an implementation, the light source unit 1 includes: a light source body 11; the dodging collimation unit 12 is disposed in the irradiation area of the light source body 11, and is located between the light source body 11 and the light guiding unit 21.

Specifically, in the technical scheme adopted by the utility model, the light source unit 1 specifically can comprise a light source body 11 and a uniform light collimation unit 12, and the light source body 11 specifically can be a single LED or can also be a three-color LED which is used as a light source to emit light; the light-homogenizing and collimating unit 12 is arranged in the irradiation area of the light source body 11 and is positioned between the light source body 11 and the light guide unit 21, the light-homogenizing and collimating unit 12 can redirect the light emitted by the light source body 11 and has two functions of homogenizing and collimating, wherein the homogenizing is to enable the light emitted by the light source body 11 to be approximately uniformly emitted on the emitting surface of the light-homogenizing and collimating unit 12, the collimating is to enable the divergent light emitted by the light source body 11 to be converted into parallel light when emitted from the emitting surface of the light-homogenizing and collimating unit 12, and the light-homogenizing and collimating unit 12 can be divided into two parts or can be of an integral structure, so that the aim of homogenizing and collimating the light emitted by the light source body 11 can be achieved; when the light source body 11 is a three-color LED, the number of the light-homogenizing collimating units 12 may be one, and simultaneously correspond to the three-color LED, or as shown in fig. 3, the number of the light-homogenizing collimating units 12 may be three, and respectively correspond to the three-color LED; wherein, the outgoing direction of the light source light rays which are emitted by the light source unit 1 after being subjected to uniform light and collimation is opposite to the outgoing direction of the first polarized light reflected by the first polarization beam splitter 22.

Further, referring to fig. 1 to fig. 3, in the implementation, the optical waveguide 2 further includes: a second polarizing unit disposed at an interval from the first polarizing unit in the first direction a, the second polarizing unit including a plurality of second polarizing beam splitters 23 disposed at an interval along the first direction a; and a polarized light converting unit 24 disposed between the first and second polarizing units; the polarization conversion unit 24 is configured to convert the second polarized light transmitted by the first polarization unit into first polarized light, and the plurality of second polarization splitters 23 are configured to sequentially reflect the first polarized light partially converted by the polarization conversion unit 24.

Specifically, since the first polarizing beam splitter 22 can reflect only the first polarized light and then emit the first polarized light, and transmit the second polarized light, 50% of the polarized energy is lost, and the light-availability is greatly reduced, in order to improve the light energy utilization rate, in the technical scheme adopted by the present utility model, the light guide waveguide 2 further includes: the second polarization unit 24 is disposed between the first polarization unit and the second polarization unit, and is capable of converting the second polarized light transmitted by the first polarization unit into the first polarized light, the second polarization unit includes a plurality of second polarization splitters 23 disposed at intervals along the first direction a, and the second polarization splitters 23 are the same as the first polarization splitters 22 in function, i.e., capable of reflecting the first polarized light and transmitting the second polarized light, and in this scheme, after the second polarized light is converted into the first polarized light by the polarization conversion unit 24, a part of the first polarized light converted by the polarization conversion unit 24 is sequentially reflected by the plurality of second polarization splitters 23 until all or nearly all of the first polarized light converted by the polarization conversion unit 24 is reflected and emitted, so that the light energy utilization rate can be effectively improved, and the illumination brightness of the illumination system can be further improved, and the brightness finally transmitted to the display unit 4 can be improved by nearly one time. Wherein the polarized light converting unit 24 may be a half glass slide; the second polarization beam splitter 23 is disposed in parallel with the first polarization beam splitter 22.

The specific arrangement and principle of the light guide 2 are illustrated below: with the energy of the light source light being 100%, the light source light comprises 50% of first polarized light and 50% of second polarized light, referring to fig. 1, two first polarized light splitters 22 and two second polarized light splitters 23 can be arranged, a polarized light conversion unit 24 is arranged between the two first polarized light splitters 22 and the two second polarized light splitters 23, each first polarized light splitter 22 and each second polarized light splitter 23 can respectively reflect 25% of first polarized light, after the light source light passes through the first polarized light splitters 22, 25% of first polarized light is reflected and emitted, all second polarized light is transmitted, the remaining 25% of first polarized light and all second polarized light are transmitted to the other first polarized light splitters 22, the remaining 25% of first polarized light is emitted after being continuously reflected, all second polarized light is transmitted and converted into first polarized light by the polarized light conversion unit 24, 25% of first polarized light emitted after passing through the first polarized light splitters 23 is reflected, the remaining 25% of first polarized light is emitted after being reflected by the other second polarized light splitters 23, and the light uniformity of the light is ensured by using the other polarized light, and the light source light has the uniform light transmittance.

Further, referring to fig. 1 to 3, in an implementation, the light guiding unit 21 includes: at least one beam splitter; when the light guide unit 21 includes at least two of the light splitting sheets, the at least two light splitting sheets are disposed at intervals along the first direction a.

Specifically, in the technical solution adopted in the present utility model, the light guiding unit 21 plays a role of conducting the light source light emitted by the light source unit 1 to the first polarization unit, and may specifically include at least one light splitting sheet for reflecting the light source light so as to reflect the light source light emitted by the light source unit 1 and perpendicular to the first direction a to propagate along the first direction a, where the light splitting sheet is arranged in a manner that: symmetrically arranged with the first polarization beam splitter 22; the number of light splitting sheets may be set according to the light emitting range of the light source light emitted from the light source unit 1 in the first direction a, and when two or more light splitting sheets are provided, the light splitting sheets are parallel to each other and are arranged at intervals along the first direction a.

Further, referring to fig. 1 to fig. 3, in the implementation, the optical waveguide 2 further includes: a base prism 25 extending along the first direction a, the at least one light splitting sheet, the plurality of first polarization splitting sheets 22, the polarization conversion unit 24, and the plurality of second polarization splitting sheets 23 being disposed in the base prism 25 at respective angles.

Specifically, in the technical scheme adopted by the utility model, the substrate prism 25 can be used for carrying the light splitting sheet, the first polarization splitting sheet 22, the polarization conversion unit and the second polarization sheet 5111, and the interior of the substrate prism 25 can be used for transmitting light; specifically, the base prism 25 may be configured as a plurality of portions, where adjacent portions are fit and matched with each other, and the plurality of portions may be spliced to form a prism extending along the first direction a, where each portion includes a bearing surface having a preset angle, and the preset angle is an angle required to be set by a structure used for bearing the portion, for example: taking the portion carrying the first light splitting sheet as an example, the cross section of the portion may be parallelogram, and two acute angles formed by the portion are 45 degrees, and two adjacent first light splitting sheets may be respectively attached to two inclined surfaces of the portion.

Example two

Referring to fig. 4, a second embodiment of the present utility model provides a display device, which includes: the waveguide unit 3 includes a coupling-in region 31 and a coupling-out region 32 disposed at intervals in the first direction a; the illumination system described above corresponds to the coupling-in region 31; a display unit 4 for generating image light corresponding to image data from the image data; and an optical unit 5 disposed between the light-emitting portion of the illumination system and the display unit 4; the first polarized light emitted by the illumination system is converged to the display unit 4 by the optical unit 5, and the image light forms an enlarged virtual image by the optical unit 5 and enters the coupling-in region of the waveguide unit 3 through the light guide 2 of the illumination system and exits from the coupling-out region 32.

Specifically, the near-eye display device provided in this embodiment is an augmented reality (Augmented Reality, AR) near-eye display device, which is an apparatus combining display and virtualization, and includes: the waveguide unit 3, the above-mentioned illumination system, the display unit 4 and the optical unit 5, the waveguide unit 3 includes a coupling-in area 31 and a coupling-out area 32 which are disposed at intervals in the first direction a, the coupling-in area 31 corresponds to the position of the illumination system, the optical unit 5 and the display unit 4, the display unit 4 is used for generating image light corresponding to the image data according to the image data, specifically may be a liquid crystal display screen, the first polarized light emitted from the above-mentioned illumination system is converged to the display unit 4 through the optical unit 5, so as to play a role of illuminating the display unit 4 and improving the brightness of the image light, the image light forms an amplified virtual image through the optical unit 5 and enters the coupling-in area of the waveguide unit 3 through the waveguide 2 of the illumination system, propagates in the waveguide unit 3 according to the total reflection theorem, and finally exits through the coupling-out area 32 of the waveguide unit 3 and enters the human eye to image.

Further, referring to fig. 5 to 6, in an implementation, the optical unit 5 includes: a first lens 51 and a second lens 52, the first lens 51 and the second lens 52 being disposed at intervals in a direction from the light guide 2 to the image processing unit, a composite polarizing film 511 being disposed on a surface of the first lens 51 facing the second lens 52, and a transflective film 521 being disposed on a surface of the second lens 52 facing away from the first lens 51.

Specifically, the optical unit 5 is formed by combining a group of lenses, which plays two roles, namely, converging the light beam emitted from the illumination system to the display unit 4 to play a role of converging the illumination light beam, and amplifying the image light modulated by the display unit 4 into a virtual image to the coupling-in area 31 of the waveguide unit 3, wherein the lens group is generally formed by a plurality of lenses according to different optical indexes, the arrangement of the plurality of lenses can certainly increase the whole volume and the weight of the near-eye display device, so as to limit the volume and the weight of the optical unit 5. The first lens 51 and the second lens 52 are arranged at intervals in the outgoing direction of the illumination beam of the illumination system, the compound polarization film 511 is arranged on the surface of the first lens 51 facing the second lens 52, the semi-transparent and semi-reflective film 521 is arranged on the surface of the second lens 52 facing away from the first lens 51, the first polarized light emitted by the illumination system is reflected to the surface of the second lens 52 by the semi-transparent and semi-reflective film 521 on the surface of the second lens 52 after passing through the first lens 51, the compound polarization film 511 on the surface reflects the beam back to the second lens 52, the times of the relation beam passing through the first lens 51 and the second lens 52 can be increased through the return of the optical path, so that the number of lenses can be reduced by utilizing the polarized return optical path, and the whole volume and weight of the optical unit 5 and the near-eye display device can be reduced. Among them, the composite polarizing film 511 may include: the polarizer 5111, the polarization reflecting film 5112 and the quarter-phase retarder 5113 which are sequentially laminated on the surface of the first lens 51, and an antireflection film 5114 can be added on the surface of the quarter-phase retarder 5113 optimally; it should be noted that the optical unit 5 is not limited to include only the first lens 51 and the second lens 52, and the number of lenses may be increased according to actual situations and needs.

It should be noted that, in the description of the present specification, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model; the terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. A lighting system, comprising:

a light source unit for emitting light of the light source to provide illumination to the display unit;

a light guide comprising:

the light guide unit is arranged in the irradiation area of the light source light;

a first polarizing unit including a plurality of first polarizing beam splitters arranged at intervals along a first direction;

the light source light comprises first polarized light and second polarized light, the polarization direction of the first polarized light is intersected with that of the second polarized light, the light guide unit is used for conducting the light source light to the polarization unit along the direction of conduction, and the plurality of first polarization light splitters are used for sequentially reflecting part of the first polarized light and respectively transmitting the second polarized light.

2. The lighting system according to claim 1, wherein the light source unit comprises:

a light source body;

the light homogenizing and collimating unit is arranged in the irradiation area of the light source body and is positioned between the light source body and the light guide unit.

3. The lighting system according to claim 1 or 2, wherein the light guide further comprises:

a second polarizing unit disposed at an interval from the first polarizing unit in the first direction, the second polarizing unit including a plurality of second polarizing beam splitters disposed at intervals along the first direction;

a polarized light conversion unit disposed between the first and second polarization units;

the polarization conversion unit is used for converting the second polarized light transmitted by the first polarization unit into the first polarized light, and the plurality of second polarization splitting sheets are used for sequentially reflecting part of the first polarized light converted by the polarization conversion unit.

4. A lighting system as recited in claim 3, wherein,

the polarized light converting unit includes a half glass slide.

5. A lighting system as recited in claim 3, wherein,

the light guide unit includes: at least one beam splitter;

when the light guide unit comprises at least two light splitting sheets, the at least two light splitting sheets are arranged at intervals along the first direction.

6. A lighting system as recited in claim 5, wherein said light guide further comprises:

and a base prism extending along the first direction, wherein the at least one light splitting sheet, the plurality of first polarization light splitting sheets, the polarization light conversion unit and the plurality of second polarization light splitting sheets are respectively arranged in the base prism at respective angles.

7. A lighting system as recited in claim 3, wherein,

the reflectivity and the transmissivity of the plurality of first polarization light splitting sheets are the same; and/or the number of the groups of groups,

the reflectivity and the transmissivity of the plurality of second polarization light splitting sheets are the same.

8. A display device, comprising:

a waveguide unit including coupling-in regions and coupling-out regions arranged at intervals in a first direction;

the illumination system of any of claims 1-7, corresponding to the incoupling region;

a display unit for generating image light corresponding to image data according to the image data;

an optical unit disposed between a light-emitting portion of the illumination system and the display unit;

the first polarized light emitted by the illumination system is converged to the display unit through the optical unit, and the image light forms an amplified virtual image through the optical unit and enters the coupling-in region of the waveguide unit through the waveguide of the illumination system and exits from the coupling-out region.

9. The display device of claim 8, wherein the display device comprises a display device,

the optical unit includes:

the display device comprises a first lens and a second lens, wherein the first lens and the second lens are arranged at intervals in the direction from the light guide to the display unit, a composite polarizing film is arranged on the surface of the first lens facing the second lens, and a semi-transparent and semi-reflective film is arranged on the surface of the second lens facing away from the first lens.

10. The display device of claim 9, wherein the display device comprises a display device,

the composite polarizing film includes a polarizing plate, a polarizing reflection film, and a quarter-phase retarder sequentially laminated on the surface of the first lens.