CN116989287A - Matrix headlight lighting system and car light based on spatial light modulator - Google Patents

Matrix headlight lighting system and car light based on spatial light modulator Download PDF

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Publication number
CN116989287A
CN116989287A CN202310684838.6A CN202310684838A CN116989287A CN 116989287 A CN116989287 A CN 116989287A CN 202310684838 A CN202310684838 A CN 202310684838A CN 116989287 A CN116989287 A CN 116989287A
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CN
China
Prior art keywords
light
lens
array
light modulator
spatial light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310684838.6A
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Chinese (zh)
Inventor
荣四海
徐晓立
郑扬
范雨晓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Magneti Marelli Automotive Components Wuhu Co Ltd
Original Assignee
Magneti Marelli Automotive Components Wuhu Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Magneti Marelli Automotive Components Wuhu Co Ltd filed Critical Magneti Marelli Automotive Components Wuhu Co Ltd
Priority to CN202310684838.6A priority Critical patent/CN116989287A/en
Publication of CN116989287A publication Critical patent/CN116989287A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
    • F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/003—Controlling the distribution of the light emitted by adjustment of elements by interposition of elements with electrically controlled variable light transmissivity, e.g. liquid crystal elements or electrochromic devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The application provides a matrix headlight illumination system and a headlight based on a spatial light modulator, comprising: a light source, a condenser lens, a polarizer, a lens array, a spatial light modulator, and a projection lens; the light source, the condensing lens, the polarizing device, the lens array, the spatial light modulator and the projection lens are sequentially arranged along the light emitting direction; the light emitted by the light source irradiates on the condensing lens, the light is converged and collimated by the condensing lens, the parallel light is changed into parallel uniform light beam to be emitted, the parallel light is changed into quasi-straight polarized light by the polarizing device, the collimated polarized light is converged into a point light source array by the lens array, the point light source array is focused on the spatial light modulator, the projection light beam array is formed by adjusting the spatial light modulator, and the projection light beam array is emitted by the projection objective. The application does not need to adopt expensive DMD technology or special LED chip to realize high-pixel matrix illumination, and realizes man-vehicle interaction functions such as projection and the like under the basic requirement of conventional high-beam and low-beam illumination.

Description

Matrix headlight lighting system and car light based on spatial light modulator
Technical Field
The application relates to the technical field of automobile lamps, in particular to a matrix headlight illumination system based on a spatial light modulator and an automobile lamp.
Background
The existing high-pixel ADB modules mostly adopt micro LEDs or DMD devices to realize high-pixel matrix headlights.
MircoLED is a multi-chip LED combined light source, and is often composed of tens or hundreds of single micro LED light emitting chips on a common LED substrate, unlike a common single chip or multi-chip LED. The chips are different from the common multiple chips in same on-off, and can output different illumination energies simultaneously and independently on-off, so that the flexibility and the integration level of the illumination design of the headlamp matrix are improved. However, the manufacturers who master the processing and manufacturing technology of the light source are very few at present, and the purchase and use cost of the device is relatively high. Meanwhile, the number of the chip arrays is not particularly large because of the chip size and the substrate size, and the number of the illumination matrixes formed by the chip arrays is not particularly large, so that the increasingly fine and personalized matrix illumination requirements of a vehicle factory cannot be met.
DMD devices, mainly referred to as digital micro-mirror devices, are widely used in DLP projectors. It consists of many small aluminum mirrors, each of which is called a pixel. Each mirror is capable of deflecting about the diagonal or central axis of each small positive direction mirror (or pixel), the imaging pattern and its characteristics being determined by controlling the rotation of the micromirror plate about a fixed axis (yoke) and the time domain response (determining the angle of reflection and dead time of the light). The method has the characteristics of high resolution, short response time, high reliability and the like, and is gradually applied to vehicle-scale personalized ground projection and headlamp illumination. However, the DMD device has high use cost, and the design of the imaging illumination path is complex, so that the illumination path and the imaging path need to be separated to avoid light crosstalk, and the improvement of the illumination efficiency is a difficult problem in the design of such a system.
Disclosure of Invention
In view of the defects in the prior art, the application aims to provide a matrix headlamp lighting system and a vehicle lamp based on a spatial light modulator.
According to the present application, there is provided a spatial light modulator-based matrix headlight illumination system comprising: a light source, a condenser lens, a polarizer, a lens array, a spatial light modulator, and a projection lens;
the light source, the condensing lens, the polarization device, the lens array, the spatial light modulator and the projection lens are sequentially arranged along the light emitting direction;
the light emitted by the light source irradiates on the condensing lens, the light is converged and collimated by the condensing lens, the light becomes parallel uniform light beams to be emitted, the parallel light is changed into quasi-straight polarized light by the polarizer, the collimated polarized light is converged into a point light source array by the lens array, the point light source array is focused on the spatial light modulator, the projection light beam array is formed by adjusting the spatial light modulator, and the projection light beam array is emitted by the projection objective.
Preferably, the condensing lens includes a first condensing lens and a second condensing lens;
the first condensing lens and the second condensing lens are sequentially arranged between the light source and the polarization device along the light emitting direction.
Preferably, the lens array includes a plurality of micro lenses, and the plurality of micro lenses are arranged in an array.
Preferably, the micro lenses are arranged in a rectangular array or a honeycomb array.
Preferably, the spatial light modulator comprises a plurality of independently controlled pixel units;
the liquid crystal polarization state of the pixel unit is adjusted by adjusting the electronic signals input to the pixel unit, the pixel unit is adjusted to transmit or block light by adjusting the liquid crystal polarization state, bright points or dark points are formed, and a projection image formed by transmitting light beams is adjusted by adjusting the formed bright points or dark points.
Preferably, the spatial light modulator is a liquid crystal device, and the transparent region and the opaque region are formed by forming bright dots or dark dots through the pixel unit.
Preferably, the projection lens is a single lens or a multi-lens group, the multi-lens group is a zooming system, and the projection gesture is controlled by matching with a mechanical part of the headlight, so that free real-time conversion of far-field projection and near-field projection is realized.
Preferably, the light source, the condenser lens, the polarizer, the lens array, the spatial light modulator, and the projection lens are all on the same optical axis.
Preferably, the optical system further comprises a polarization converter, wherein the polarization converter is arranged between the polarization device and the lens array, and the polarization converter converts light rays emitted by the light source into elliptical polarized light rays.
Preferably, the light source is any one of the following: surface light emitters, point light emitters, and rod light emitters.
The application also provides a car lamp, which comprises the matrix headlight illumination system based on the spatial light modulator.
Compared with the prior art, the application has the following beneficial effects:
1. the system does not need to adopt expensive DMD technology or special LED chips to realize high-pixel matrix illumination, and can realize man-vehicle interaction functions such as projection and the like under the condition of meeting the basic requirements of conventional far and near light illumination;
2. the application uses the lens array to form the point light source array, modulates the emergent point light source through the spatial light modulator, and achieves the purpose of the required matrix illumination field;
3. the application can avoid the technical proposal of adopting a multi-chip light source or a DMD device, and the change of the illumination field has the characteristics of convenient realization, high response speed, individuation and the like;
4. the system does not need to adopt an off-axis light path design, and the whole optical system is on the same optical axis, so that optical devices such as a field lens or a prism and the like can be avoided, the light path length of the system can be effectively shortened, and the weight of the system can be reduced;
5. according to the application, the point light source array is formed through the spatial light modulator, so that the problem that a single LED light source forms a multi-pixel (the number of pixels is more than 20) matrix illumination field is solved, and the aim of reducing the dependence on a special light source is fulfilled;
6. the application adopts the scheme that after the light beam emitted by the common LED light source is collimated and polarized by the lens array, the light beam is modulated by the spatial light modulator, so that the illumination field or pattern required by projection is realized. The system can bypass the multi-chip LED or DMD device which is mainstream at present to realize the aim of matrix illumination, and the theory of the spatial light modulator is that the projection of any pattern can be realized only by changing an input picture, and the conversion speed depends on the input processing speed of the input picture.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is an optical path diagram of a spatial light modulator based matrix headlamp illumination system of the present application;
FIG. 2 is a schematic diagram highlighting light passing through a lens array and a spatial light modulator.
The figure shows:
light source 1 spatial light modulator 6
The first condenser lens 2 projects the lens 7
The second condenser lens 3 illuminates the receiving screen 8
Polarization device 4 beam array 9
Lens array 5 projects an array of light beams 10
Detailed Description
The present application will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present application, but are not intended to limit the application in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present application.
Example 1:
as shown in fig. 1 and 2, the present embodiment provides a spatial light modulator-based matrix headlamp illumination system, including: the light source 1, the condenser lens, the polarizing device 4, the lens array 5, the spatial light modulator 6, and the projection lens 7 are disposed in this order along the light emitting direction, and the light source 1, the condenser lens, the polarizing device 4, the lens array 5, the spatial light modulator 6, and the projection lens 7. The light emitted by the light source 1 irradiates on the condensing lens, the light is converged and collimated by the condensing lens, the parallel light is changed into parallel light to be emitted out of the uniform light beam, the parallel light is changed into collimated polarized light by the polarizing device 4, the collimated polarized light is converged into a point light source array by the lens array 5, the point light source array is focused on the spatial light modulator 6, the projection light beam array 10 is formed by adjusting the spatial light modulator 6, the projection light beam array 10 is emitted out of the projection objective 7, and the light beam emitted out of the projection objective 7 is projected onto the illumination receiving screen 8.
The light source 1, the condenser lens, the polarizing device 4, the lens array 5, the spatial light modulator 6 and the projection lens 7 are all on the same optical axis. The light source 1 is any one of the following: surface light emitters, point light emitters, and rod light emitters.
The lens array 5 includes a plurality of micro lenses, and the plurality of micro lenses are arranged in an array. The micro lenses are arranged in a rectangular array or a honeycomb array.
The condenser lens includes a first condenser lens 2 and a second condenser lens 3, and the first condenser lens 2 and the second condenser lens 3 are sequentially disposed between the light source 1 and the polarization device 4 in the light-emitting direction.
The spatial light modulator 6 includes a plurality of pixel units which are independently controlled, adjusts the liquid crystal polarization state of the pixel units by adjusting the electronic signals input to the pixel units, adjusts the pixel units to transmit or block light by adjusting the liquid crystal polarization state, forms bright points or dark points, and adjusts the projection image formed by transmitting the light beam by adjusting the formed bright points or dark points. The spatial light modulator 6 is a liquid crystal device, and forms transparent regions and opaque regions by forming bright or dark spots in pixel units.
The spatial light modulator based matrix headlamp illumination system of the present embodiment further comprises a polarization converter arranged between the polarization device 4 and the lens array 5, the polarization converter converting light emitted by the light source 1 into elliptically polarized light.
The application also provides a car lamp, which comprises the matrix headlight illumination system based on the spatial light modulator.
The embodiment provides a technology for realizing high-pixel matrix high-beam and low-beam illumination by using a mature lens array technology and a spatial light modulator based on a common LED light source.
Example 2:
the present embodiment will be understood by those skilled in the art as a more specific description of embodiment 1.
As shown in fig. 1 and 2, the present embodiment provides a spatial light modulator-based matrix headlight illumination system, which includes a light source 1, at least one condenser lens, a polarizing device 4, a lens array 5, a spatial light modulator 6, and at least one projection lens 7. In this embodiment, two condensing lenses are provided, namely, a first condensing lens 2 and a second condensing lens 3.
The light source 1 may be any one of a surface illuminant, a point illuminant or a rod illuminant, and the light emitted by the surface illuminant, the point illuminant or the rod illuminant irradiates on the condenser lens 2, is converged and collimated by the first condenser lens 2 and the second condenser lens 3 to become uniform parallel light, and then exits, the parallel light passes through the polarizing device 4 to become collimated polarized light, and is then converged into a point light source array by the lens array 5, namely, a light beam array 9 in fig. 2.
The lens array 5 is composed of a plurality of tiny lenses, the array arrangement can be rectangular or honeycomb according to the illumination requirement, and the array arrangement shape determines the arrangement shape of the point light source array.
The array of point light sources is focused on a spatial light modulator 6, which is a translucent liquid crystal device comprising a clear transparent pattern and opaque areas for forming the shape of the projection, which is composed of individually controllable small pixels, the polarization state of the liquid crystal of each pixel being adjusted by inputting an electronic signal to pass through the light beam, and the light being either adjusted or blocked to form a uniform bright or dark spot, and since each liquid crystal pixel is small, the shape of the projected image can be precisely and clearly controlled by electronically precisely controlling the liquid crystal.
The shape of the transmitted array of point light sources is adjusted by the spatial light modulator 6 to form an array of projection beams 10. The projection beam array 10 passes through the projection lens 7 and is projected onto the illumination receiving screen 8 to form a desired illumination field.
The application does not need to adopt expensive DMD technology or special LED chip to realize high-pixel matrix illumination, and can realize man-vehicle interaction functions such as projection and the like under the basic requirement of conventional high-beam and low-beam illumination.
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.

Claims (10)

1. A spatial light modulator-based matrix headlamp illumination system, comprising: a light source (1), a condenser lens, a polarizer (4), a lens array (5), a spatial light modulator (6) and a projection lens (7);
the light source (1), the condensing lens, the polarization device (4), the lens array (5), the spatial light modulator (6) and the projection lens (7) are sequentially arranged along the light emitting direction;
light emitted by the light source (1) irradiates on the condensing lens, the light is converged and collimated by the condensing lens, the light is changed into parallel uniform light beams to be emitted, the parallel light is changed into quasi-straight polarized light by the polarizing device (4), the collimated polarized light is converged into a point light source array by the lens array (5), the point light source array is focused on the spatial light modulator (6), a projection light beam array (10) is formed by adjusting the spatial light modulator (6), and the projection light beam array (10) is emitted by the projection objective (7).
2. A spatial light modulator based matrix headlight illumination system according to claim 1, characterized in that the condenser lens comprises a first condenser lens (2) and a second condenser lens (3);
the first condensing lens (2) and the second condensing lens (3) are sequentially arranged between the light source (1) and the polarization device (4) along the light emitting direction.
3. A spatial light modulator based matrix headlight illumination system according to claim 1, characterized in that the lens array (5) comprises a number of tiny lenses, which are arranged in an array.
4. A spatial light modulator based matrix headlamp illumination system according to claim 3 wherein a number of the micro lenses are arranged in a rectangular array or a honeycomb array.
5. A spatial light modulator based matrix headlight illumination system according to claim 1, wherein the spatial light modulator (6) comprises a number of independently controlled pixel units;
the liquid crystal polarization state of the pixel unit is adjusted by adjusting the electronic signals input to the pixel unit, the pixel unit is adjusted to transmit or block light by adjusting the liquid crystal polarization state, bright points or dark points are formed, and a projection image formed by transmitting light beams is adjusted by adjusting the formed bright points or dark points.
6. A spatial light modulator based matrix headlight illumination system according to claim 5, characterized in that the spatial light modulator (6) is a liquid crystal device, forming bright or dark spots by the pixel cells, forming transparent and opaque areas.
7. A spatial light modulator based matrix headlight illumination system according to claim 1, characterized in that the light source (1), the condenser lens, the polarizing device (4), the lens array (5), the spatial light modulator (6) and the projection lens (7) are all on the same optical axis.
8. A spatial light modulator based matrix headlight illumination system according to claim 1, further comprising a polarization converter arranged between the polarization device (4) and the lens array (5), the polarization converter converting light rays emitted by the light source (1) into elliptically polarized light rays.
9. A spatial light modulator based matrix headlight illumination system according to claim 1, characterized in that the light source (1) is any one of the following: surface light emitters, point light emitters, and rod light emitters.
10. A vehicle lamp comprising a spatial light modulator based matrix headlight illumination system as claimed in any one of the claims 1 to 9.
CN202310684838.6A 2023-06-08 2023-06-08 Matrix headlight lighting system and car light based on spatial light modulator Pending CN116989287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310684838.6A CN116989287A (en) 2023-06-08 2023-06-08 Matrix headlight lighting system and car light based on spatial light modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310684838.6A CN116989287A (en) 2023-06-08 2023-06-08 Matrix headlight lighting system and car light based on spatial light modulator

Publications (1)

Publication Number Publication Date
CN116989287A true CN116989287A (en) 2023-11-03

Family

ID=88520246

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310684838.6A Pending CN116989287A (en) 2023-06-08 2023-06-08 Matrix headlight lighting system and car light based on spatial light modulator

Country Status (1)

Country Link
CN (1) CN116989287A (en)

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