CN218824993U - Lighting system, head-up display and vehicle - Google Patents

Abstract

The utility model provides a lighting system, new line display and vehicle, include: the device comprises a light source, a reflection module, a beam expanding module, a shaping module and a diffusion module; the light source and a first transmission surface of the reflection module are sequentially arranged along a first direction, a second transmission surface of the reflection module, the beam expanding module, the shaping module and the diffusion module are sequentially arranged along a second direction, and the first direction and the second direction are not parallel to each other; the illuminating light beam generated by the light source is emitted out through the first transmission surface of the reflection module, the first reflection surface of the reflection module, the second transmission surface of the reflection module, the beam expanding module, the shaping module and the diffusion module. In the illuminating system, the reflecting module is adopted to reflect light, so that the illuminating system can adapt to a special-shaped space, a reflecting mirror is not required to be adopted to turn a light path, and the energy utilization efficiency is improved.

Description

Lighting system, head-up display and vehicle

Technical Field

The embodiment of the utility model provides a relate to optics technical field, in particular to lighting system, new line display and vehicle.

Background

A Head-Up Display (HUD) backlight illumination system is used for illuminating image information containing an instrument and navigation, so that the part of information can be projected to the vicinity of the sight of a driver through an imaging light path, frequent Head lowering during driving is avoided for watching an instrument panel, a virtual image projected to the front of an automobile windshield needs to require uniform brightness perceived by human eyes, glare is avoided, and driving safety is guaranteed.

At present, when a current HUD system is loaded, the HUD system is usually disposed in a narrow irregular space with an irregular shape in a vehicle, that is, a non-regular rectangular parallelepiped space, in order to adapt to the narrow space in the vehicle, please refer to fig. 1, a reflector 51 is usually used to turn a light path, and the reflectivity of a common reflector is 87%, which means that 13% of energy is absorbed by the reflector when the reflector is used to turn the light path, and the utilization efficiency of the energy is low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at provides an illumination system, new line display and vehicle need not to adopt the speculum to turn over the special-shaped space of light path in with the adaptation car, improves energy utilization.

In order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides a lighting system, including: the device comprises a light source, a reflection module, a beam expanding module, a shaping module and a diffusion module; the light source and the first transmission surface of the reflection module are sequentially arranged along a first direction, the second transmission surface of the reflection module, the beam expanding module, the shaping module and the diffusion module are sequentially arranged along a second direction, and the first direction and the second direction are not parallel to each other; wherein the light source is used for providing an illumination light beam; the reflection module is used for receiving the illumination light beam through the first transmission surface, transmitting the illumination light beam to the first reflection surface of the reflection module through the first transmission surface, reflecting the illumination light beam through the first reflection surface, and transmitting the illumination light beam to the beam expansion module through the second transmission surface; the beam expanding module is used for expanding the illumination light beam; the shaping module is used for adjusting the propagation angle of the illumination light beam; the diffusion module is used for diffusing the illumination light beams.

In some embodiments, the first reflective surface is configured to totally reflect the illumination beam to the second transmissive surface.

In some embodiments, the shaping module comprises a first shaping unit and/or a second shaping unit; if the shaping module comprises the first shaping unit, the first shaping unit is arranged between the beam expanding module and the diffusion module along the second direction; if the shaping module comprises the second shaping unit, the second shaping unit is arranged between the beam expanding module and the diffusion module along the second direction; if the shaping module comprises the first shaping unit and the second shaping unit, the beam expanding module, the first shaping unit, the second shaping unit and the diffusion module are sequentially arranged along the second direction; the first shaping unit is used for adjusting the longitudinal propagation angle of the illumination light beam, and the second shaping unit is used for adjusting the transverse propagation angle of the illumination light beam.

In some embodiments, if the shaping module comprises the second shaping unit, the second shaping unit is further configured to adjust a propagation direction of the illumination beam.

In some embodiments, the first shaping unit comprises a first shaping lens and the second shaping unit comprises a second shaping lens; the first shaping lens is arranged between the beam expanding module and the diffusion module along the second direction; the second shaping lens is arranged between the beam expanding module and the diffusion module along the second direction.

In some embodiments, the beam expanding module has an incident surface and an exit surface sequentially arranged along the second direction, and a first polarization splitting film array and a second polarization splitting film array are arranged inside the beam expanding module; the emergent surface is used for converting the first polarized light into second polarized light and transmitting the second polarized light; the first polarization light splitting film array and the second polarization light splitting film array are symmetrical relative to the second direction, the first polarization light splitting film array comprises at least two first polarization light splitting films which are parallel to each other, the second polarization light splitting film array comprises at least two second polarization light splitting films which are parallel to each other, and each first polarization light splitting film and each second polarization light splitting film are used for reflecting first polarization light and transmitting second polarization light.

In some embodiments, the illumination system further comprises a collimated dodging module; the light source, the collimation and dodging module and the reflection module are sequentially arranged along the first direction, and the collimation and dodging module is used for collimating and dodging the illumination light beams.

In a second aspect, embodiments of the present invention further provide a head up display, which includes the lighting system according to any one of the first aspect.

In some embodiments, the heads-up display further comprises an LCD; the LCD is arranged on the light-emitting side of the lighting system.

In a third aspect, embodiments of the present invention further provide a vehicle including a windshield and the head up display according to any one of the second aspects.

Compared with the prior art, the beneficial effects of the utility model are that: be different from the prior art's condition, the embodiment of the utility model provides a lighting system, new line display and vehicle, include: the device comprises a light source, a reflection module, a beam expanding module, a shaping module and a diffusion module; the light source and a first transmission surface of the reflection module are sequentially arranged along a first direction, a second transmission surface of the reflection module, the beam expanding module, the shaping module and the diffusion module are sequentially arranged along a second direction, and the first direction and the second direction are not parallel to each other; wherein, the light source is used for providing an illuminating light beam; the reflection module is used for receiving the illumination light beams through the first transmission surface, enabling the illumination light beams to be transmitted to the first reflection surface of the reflection module through the first transmission surface, enabling the illumination light beams to be reflected through the first reflection surface, and enabling the illumination light beams to be transmitted to the beam expansion module through the second transmission surface; the beam expanding module is used for expanding the illumination light beam; the shaping module is used for adjusting the propagation angle of the illumination light beam; the diffusion module is used for diffusing the illumination light beam. In the lighting system, the light is reflected by the reflection module, so that the lighting system can adapt to a special-shaped space, a reflector is not required to be used for turning a light path, and the energy utilization efficiency is improved.

Drawings

One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.

Fig. 1 is a schematic structural diagram of an illumination system provided in the prior art;

fig. 2 is a schematic structural diagram of an illumination system provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a reflection module according to an embodiment of the present invention;

fig. 4 is a schematic partial structural diagram of an illumination system provided in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a beam expanding module according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that, if not conflicted, the various features of the embodiments of the invention can be combined with each other and are within the scope of protection of the present application. In addition, although the functional blocks are divided in the device diagram, in some cases, the blocks may be divided differently from those in the device. Further, the terms "first," "second," and the like, as used herein, do not limit the data and the execution order, but merely distinguish the same items or similar items having substantially the same functions and actions.

Compared with the regular space (regular cuboid space) of the traditional backlight system, in order to adapt to the narrow and irregular space (i.e. non-regular cuboid space) in the vehicle, the backlight system needs to turn light in the irregular space, please refer to fig. 1, a reflector 51 is usually adopted to reflect the light after passing through the collimating optical element 21, the dodging optical element 31 and the light angle control optical element 41 to the diffusion element 61, and finally the light illuminates the LCD through the diffusion element 61, and the illuminated LCD becomes a virtual image with uniform brightness in front of the windshield glass through an imaging light path. In this illumination system, since the reflectivity of the common reflector is 87%, which means that 13% of energy is absorbed by the reflector, the use of the reflector 51 to reflect light reduces the utilization efficiency of energy, and the reflector 51 has only one optical surface, so that the control capability of light is weak, and the illumination system is not suitable for the backlight illumination design in a small space.

In addition, the light irradiated to the LCD first passes through a "lower polarizer" that transmits only P light in the LCD, and by the action of this polarizer, the incident light becomes P light that vibrates only in the incident plane (half of the energy is lost in the process); the electrified LCD can rotate the vibration direction of the light rays by 90 degrees to become S light; the S light can pass almost without loss through an "upper polarizer" that transmits only S light within the LCD. That is, half of the energy is lost when the light passes through the LCD, and the lost energy not only causes the energy utilization rate to be reduced, but also can be changed into heat inside the LCD, so that the LCD works in a high-temperature environment, and the service life of the LCD is shortened. With the increasing demand of the market for the brightness of the virtual image, in order to achieve the required brightness value of the virtual image, the power of the backlight system must be increased, but the increased power has the risk of burning out the LCD, so it is necessary to provide a HUD illumination system which is adapted to a narrow special-shaped space and has a large size, and on the premise of being adapted to the special-shaped space, the required brightness value is achieved, the power is reduced, and the LCD is prevented from being burned out.

In order to solve the technical problem, the embodiment of the utility model provides an illumination system, new line display and vehicle, can the narrow and small and special-shaped space of adaptation, can adapt to jumbo size LED and show, can improve energy utilization efficiency moreover and solve the easy overheated scheduling problem that burns out of LCD.

In a first aspect, an embodiment of the present invention provides a lighting system, please refer to fig. 2 and fig. 3, the lighting system includes: the device comprises a light source 1, a reflection module 2, a beam expanding module 3, a shaping module 4 and a diffusion module 5.

The light source 1 and the first transmission surface M1 of the reflection module 2 are sequentially arranged along a first direction, the second transmission surface M3 of the reflection module 2, the beam expanding module 3, the shaping module 4 and the diffusion module 5 are sequentially arranged along a second direction, and the first direction and the second direction are not parallel to each other. Wherein the light source 1 is used to provide an illumination beam. The reflection module 2 is configured to receive the illumination light beam through the first transmission surface M1, transmit the illumination light beam to the first reflection surface M2 of the reflection module 2 through the first transmission surface M1, reflect the illumination light beam through the first reflection surface M2, and transmit the illumination light beam to the beam expansion module 3 through the second transmission surface M3. The beam expanding module 3 is used for expanding the illumination light beams. The shaping module 4 is used for adjusting the propagation angle of the illumination light beam. The diffusing module 5 is used to diffuse the illumination beam.

The light source 1 may be an LED, and the wavelength of the illumination light beam emitted by the LED can be set according to actual needs, which is not limited herein. The reflection module 2 may be a reflection lens, and by designing the curvatures and the surface types of the first transmission surface M1, the second transmission surface M3, and the first reflection surface M2, the illumination beam may enter a subsequent optical device according to a predetermined spatial and angular distribution, and the specific curvatures and the surface types may be set according to actual needs, specifically, the first transmission surface M1, the second transmission surface M3, and the first reflection surface M2 may be free curved surfaces. The diffusion module 5 may employ a diffusion sheet, a microlens array or any suitable diffusion device known in the art.

In the illumination system, an illumination light beam emitted by a light source 1 enters the reflection module 2 through a first transmission surface M1 of the reflection module 2, is reflected to a second transmission surface M3 of the reflection module 2 through a first reflection surface M2 of the reflection module 2, and is transmitted to a beam expansion module 3 through a second transmission surface M3 of the reflection module 2; and then, the beam is expanded by the beam expanding module 3, shaped by the shaping module 4 and diffused by the diffusing module 5 to be output.

In fig. 2, the dotted line represents an irregular space, i.e., an irregular space (non-rectangular space) in the vehicle, in which the devices in the backlight module cannot be arranged in a "straight cylinder type", and some of the backlight devices need to be slightly turned so that the entire backlight module can be placed in the irregular space. In the lighting system, the lighting beam can be deflected from the first direction to the second direction for propagation after passing through the reflection module 2, so that the lighting system can adapt to narrow and special-shaped space, a reflector is not required to be adopted to turn a light path, the size of an optical part is reduced, and the energy utilization efficiency is improved.

The reflecting module 2 has three surfaces, i.e., a first transmitting surface M1, a first reflecting surface M2, and a second transmitting surface M3, so that the curvatures of the first transmitting surface M1, the first reflecting surface M2, and the second transmitting surface M3 can be changed, and for example, the first transmitting surface M1, the first reflecting surface M2, and the second transmitting surface M3 can be designed to be a spherical surface, an aspherical surface, or a free-form surface, thereby shaping light.

In some of these embodiments, the first reflective surface M2 is used to totally reflect the illumination beam to the second transmissive surface M3. Specifically, through optical design, the illumination light beams can be totally reflected to the second transmission surface M3 through the first reflection surface M2, so that no fresnel loss exists on the first reflection surface M2, and the energy utilization efficiency is further improved.

In some embodiments, please continue to refer to fig. 2, the shaping module 4 includes a first shaping unit 41 and/or a second shaping unit 42; if the shaping module 4 includes the first shaping unit 41, the first shaping unit 41 is disposed between the beam expanding module 3 and the diffusion module 5 along the second direction; if the shaping module 4 includes the second shaping unit 42, the second shaping unit 42 is disposed between the beam expanding module 3 and the diffusion module 5 along the second direction; if the shaping module 4 comprises the first shaping unit 41 and the second shaping unit 42, the beam expanding module 3, the first shaping unit 41, the second shaping unit 42 and the diffusion module 5 are sequentially arranged along the second direction; the first shaping unit 41 is configured to adjust a longitudinal propagation angle of the illumination light beam, and the second shaping unit 42 is configured to adjust a transverse propagation angle of the illumination light beam. Where the longitudinal propagation angle is the propagation angle in the vertical direction in fig. 2, and the lateral propagation angle is the propagation angle in the direction perpendicular to the paper in fig. 2.

In this lighting system, can design first plastic unit 41 and second plastic unit 42 according to the required illumination area of LCD, with the width of adjustment illuminating beam on horizontal and vertical direction, thereby make illuminating beam can match the light-emitting width of horizontal and vertical direction of formation of image light beam, wherein, adjust the vertical propagation angle and the horizontal propagation angle of illuminating beam respectively through designing two plastic units, can reduce the dispersion that is caused by single plastic unit to the vertical propagation angle and the horizontal propagation angle adjustment together of illuminating beam, thereby improve the display effect of virtual image.

In some of these embodiments, if the shaping module 4 comprises the second shaping unit 42, the second shaping unit 42 is also used for adjusting the propagation direction of the illumination light beam. That is, in the present embodiment, the second shaping unit 42 is also used to deflect the illumination beam, and the deflection angle of the illumination beam is smaller than the deflection angle of the illumination beam by the reflection module 2, so that the degree of further matching with the LCD can be improved.

Specifically, in some embodiments, the first shaping unit 41 includes a first shaping lens, and the second shaping unit 42 includes a second shaping lens; the first shaping lens is arranged between the beam expanding module 3 and the diffusion module 5 along the second direction; the second shaping lens is arranged between the beam expanding module 3 and the diffusion module 5 along the second direction.

Referring to fig. 4, the first shaping lens included in the first shaping unit 41 may be a cuboid structure, a cross section of the first shaping lens in a direction perpendicular to the second direction is rectangular, the first shaping lens has a first surface and a second surface, the illumination beam enters the first shaping lens through the first surface of the first shaping lens and finally exits through the second surface of the first shaping lens, and the longitudinal propagation angle of the illumination beam can be adjusted by designing curvatures of the first surface and the second surface of the first shaping lens.

The second shaping unit 42 may include a second shaping lens having a triangular prism-like structure, and an interface in the second direction of the second shaping lens is triangular, the second shaping lens has a first surface and a second surface, the illumination beam enters the second shaping lens through the first surface of the second shaping lens and finally exits through the second surface of the second shaping lens, and by designing curvatures of the first surface and the second surface of the second shaping lens, a lateral propagation angle of the illumination beam and/or a deflection angle of the illumination beam may be adjusted.

In this embodiment, the first shaping lens and the second shaping lens are matched to well match the imaging beam. And the function of matching the light beams is separated by the two lenses, so that the ground dispersion caused by the fact that the single lens simultaneously realizes the matching in the transverse direction and the longitudinal direction is relieved, the overlarge dispersion caused by the overlarge deflection of incident light and emergent light is avoided, and the display effect of the virtual image is improved.

In some embodiments, referring to fig. 2 and 5 in combination, the beam expanding module 3 has an incident surface N1 and an exit surface N2 sequentially arranged along a second direction, and a first polarization splitting film array and a second polarization splitting film array are arranged inside the beam expanding module 3; the emergent surface N2 is used for converting the first polarized light into second polarized light and transmitting the second polarized light; the first polarization light-splitting film array and the second polarization light-splitting film array are symmetrical about a second direction, the first polarization light-splitting film array comprises at least two first polarization light-splitting films X1 which are parallel to each other, the second polarization light-splitting film array comprises at least two second polarization light-splitting films X2 which are parallel to each other, and each first polarization light-splitting film X1 and each second polarization light-splitting film X2 are used for reflecting first polarization light and transmitting second polarization light.

Specifically, the first polarized light may be S polarized light, and the second polarized light is P polarized light, so that the illumination light beam enters through the entrance plane N1 of the beam expanding module 3, exits through the first polarization splitting film array and the second polarization splitting film array to the exit plane, and finally exits through the exit plane N2. The P polarized light in the illumination light beam can be directly transmitted to the exit surface N2 through the first polarization splitting film array and the second polarization splitting film array, and is directly transmitted through the exit surface N2; after being reflected by the first polarization light-splitting film X1 and the second polarization light-splitting film X2, the S polarized light in the illumination light beam is reflected to the emergent surface N2 through the next first polarization light-splitting film X1 and the next second polarization light-splitting film X2, and is converted into P polarized light through the emergent surface N2 and then is transmitted through the emergent surface N2.

Therefore, the beam expanding module 3 can realize the function of expanding the emergent light beam by at least 2 times in the direction vertical to the second direction in a short distance, so that the expanded illuminating light beam is matched with the large-size LCD for display, and the illuminating light beam emitted by the beam expanding module 3 is all P polarized light.

In some embodiments, referring to fig. 2, the illumination system further includes a collimating and dodging module 6; the light source 1, the collimation dodging module 6 and the reflection module 2 are sequentially arranged along a first direction, and the collimation dodging module 6 is used for collimating and dodging the illumination light beams. The collimating and dodging module 6 may be a collimating and dodging lens, and the specific structure thereof is not limited herein, referring to the prior art. In this embodiment, the illumination light beam generated by the light source 1 is collimated and homogenized by the collimated and homogenized light module 6, so that the emitted illumination light beam can be adapted to the reflection module 2. Further, in some embodiments, the collimated dodging module 6 is also used for shrinking the light beam, for example, the collimated dodging module 6 can be used for shrinking the divergence angle of the illumination light beam to within ± 5 degrees, so that the illumination light beam is incident on the reflection module 2 at a small angle, which not only can reduce the volume of the reflection module 2, but also can improve the accurate control of the illumination light beam by the reflection module 2, so that the illumination light beam is deflected according to the predetermined direction.

The lighting system provided by the embodiment of the present invention is described in detail below with reference to the embodiment shown in fig. 2. The light source 1 may be an LED light source.

In fig. 2, after the illumination light beam emitted by the light source 1 is collimated and homogenized by the collimating and homogenizing module 6, the illumination light beam enters the reflection module 2 at a small angle of incidence, and after being reflected by the reflection module 2, the illumination light beam is deflected from the first direction to the second direction. The first transmission surface M1, the first reflection surface M2, and the second transmission surface M2 of the reflection module 2 may be free curved surfaces, and the illumination beam is totally reflected and deflected on the first reflection surface M2, so that no fresnel loss exists in the surfaces, and the energy utilization efficiency is improved. And the first transmission surface M1, the first reflection surface M2 and the second transmission surface M2 of the reflection module 2 are all used for control during light deflection, and have the advantages of low fresnel loss and strong light control capability relative to the direction of light deflected by the reflector, and can be adapted to optical elements with high requirements on incident light angles, such as the beam expanding module 3.

The beam expanding module 3 has very high requirement to the incident ray angle of divergence, and big angle of divergence can lead to beam expanding module 3 to be difficult to realize expanding the beam function according to predetermined outgoing direction, and light is after reflection module 2's deflection control to be close to 0 degree the angle of divergence, be close to the parallel light promptly and incide beam expanding module 3. As shown in fig. 5, the light incident on the beam expanding module 3 as near-collimated light is composed of S-polarized light and P-polarized light, each of which occupies 1/2 of the total energy, and the P-polarized light directly passes through the first polarization splitting film X1 and the second polarization splitting film X2 of the beam expanding module 3 and is emitted to the shaping module 4 through the emitting surface N2; the S polarized light is reflected to the next first polarization splitting film X1 and the second polarization splitting film X2, the S polarized light is reflected to the exit surface N2 through the next first polarization splitting film X1 and the second polarization splitting film X2, and the S polarized light is converted into the P polarized light through the exit surface N2 and is emitted to the shaping module 4. This beam expanding module 3 has not only realized in the short distance outgoing beam enlarge 2 times function matching large size LCD show, and the light beam of outgoing is P light entirely moreover, has avoided adopting the S light that natural light directly shines LCD appearance to be absorbed the energy loss that brings and the difficult problem of LCD heat dissipation by lower polarization piece, improves energy utilization efficiency, can not appear LCD because the heat accumulation leads to burning out the scheduling problem.

Then, after the illumination light beams are shaped by the first shaping unit 41 and/or the second shaping unit 42, the longitudinal width and the transverse width of the LCD can be adapted, so that the illumination light beams are coupled to form a large image, and the functions of transverse matching and longitudinal matching of the light beams are separated by the two shaping units, thereby relieving the dispersion caused by the fact that the single lens simultaneously realizes the transverse and longitudinal matching, and improving the display effect of the virtual image. In addition, the second shaping unit 42 can also control the deflection direction of the light, so that the emitted illumination light beam not only couples the width of the illumination light beam into the imaging light, but also the deflection angle of the illumination light beam can be matched with the imaging light.

Then, the illumination beam emitted by the shaping module 4 is incident to the diffusion module 5, is diffused by the diffusion module 5 and then is emitted to the LCD10, finally, the LCD10 can display an image according to image information after receiving the illumination beam, and the image can form a clear and uniform image on the virtual image surface after passing through a subsequent imaging optical path.

To sum up, the embodiment of the utility model provides an illumination system not only can adapt in narrow and small special-shaped space in a poor light, compares in traditional illumination system moreover, can improve energy utilization efficiency under equal lighting power, and can avoid the overheated damage of system, helps simplifying heat radiation structure's design.

In a second aspect, embodiments of the present invention further provide a head up display, which includes the lighting system according to any one of the first aspect. In this embodiment, the lighting system has the same structure and function as the lighting system according to any one of the first aspect, and will not be described herein again.

In some embodiments, the heads-up display further comprises an LCD. The LCD is arranged on the light-emitting side of the illumination system. Specifically, the LCD is arranged on the light emitting side of the diffusion module, and the LCD can generate image light with image information after receiving the illumination light beams. For the specific structure of the LCD, reference is made to the prior art, and the detailed description is omitted here.

In a third aspect, embodiments of the present invention further provide a vehicle including a windshield and the heads-up display according to any one of the second aspects. In this embodiment, the head-up display has the same structure and function as the head-up display according to any one of the second aspects, and the description thereof is omitted here. The vehicle can be a vehicle, a train, an airplane and the like, and the windshield glass is used for reflecting image light emitted by the head-up display to human eyes.

It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. An illumination system, comprising: the device comprises a light source, a reflection module, a beam expanding module, a shaping module and a diffusion module;

the light source and the first transmission surface of the reflection module are sequentially arranged along a first direction, the second transmission surface of the reflection module, the beam expanding module, the shaping module and the diffusion module are sequentially arranged along a second direction, and the first direction and the second direction are not parallel to each other;

wherein the light source is used for providing an illumination light beam;

the reflection module is used for receiving the illumination light beam through the first transmission surface, transmitting the illumination light beam to the first reflection surface of the reflection module through the first transmission surface, reflecting the illumination light beam through the first reflection surface, and transmitting the illumination light beam to the beam expansion module through the second transmission surface;

the beam expanding module is used for expanding the illumination light beam;

the shaping module is used for adjusting the propagation angle of the illumination light beam;

the diffusion module is used for diffusing the illumination light beams.

2. The illumination system of claim 1, wherein the first reflective surface is configured to totally reflect the illumination beam to the second transmissive surface.

3. The lighting system according to claim 1 or 2, wherein the shaping module comprises a first shaping unit and/or a second shaping unit;

if the shaping module comprises the first shaping unit, the first shaping unit is arranged between the beam expanding module and the diffusion module along the second direction;

if the shaping module comprises the second shaping unit, the second shaping unit is arranged between the beam expanding module and the diffusion module along the second direction;

if the shaping module comprises the first shaping unit and the second shaping unit, the beam expanding module, the first shaping unit, the second shaping unit and the diffusion module are sequentially arranged along the second direction;

the first shaping unit is used for adjusting the longitudinal propagation angle of the illumination light beam, and the second shaping unit is used for adjusting the transverse propagation angle of the illumination light beam.

4. The illumination system of claim 3, wherein the second shaping unit is further configured to adjust a propagation direction of the illumination beam if the shaping module comprises the second shaping unit.

5. The illumination system of claim 3, wherein the first shaping unit comprises a first shaping lens and the second shaping unit comprises a second shaping lens;

the first shaping lens is arranged between the beam expanding module and the diffusion module along the second direction;

the second shaping lens is arranged between the beam expanding module and the diffusion module along the second direction.

6. The illumination system according to claim 1 or 2, wherein the beam expanding module has an incident surface and an exit surface which are sequentially arranged along the second direction, and a first polarization splitting film array and a second polarization splitting film array are arranged inside the beam expanding module;

the emergent surface is used for converting the first polarized light into second polarized light and transmitting the second polarized light;

the first polarization light splitting film array and the second polarization light splitting film array are symmetrical relative to the second direction, the first polarization light splitting film array comprises at least two first polarization light splitting films which are parallel to each other, the second polarization light splitting film array comprises at least two second polarization light splitting films which are parallel to each other, and each first polarization light splitting film and each second polarization light splitting film are used for reflecting first polarization light and transmitting second polarization light.

7. The illumination system of claim 1 or 2, further comprising a collimated dodging module;

the light source, the collimation and dodging module and the reflection module are sequentially arranged along the first direction, and the collimation and dodging module is used for collimating and dodging the illumination light beams.

8. A head-up display comprising an illumination system as claimed in any one of claims 1 to 7.

9. The heads-up display of claim 8 further comprising an LCD;

the LCD is arranged on the light-emitting side of the illumination system.

10. A vehicle comprising a windscreen and a head-up display as claimed in claim 8 or 9.

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