CN115076653A - Vehicle lamp system - Google Patents
Vehicle lamp system Download PDFInfo
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- CN115076653A CN115076653A CN202210772202.2A CN202210772202A CN115076653A CN 115076653 A CN115076653 A CN 115076653A CN 202210772202 A CN202210772202 A CN 202210772202A CN 115076653 A CN115076653 A CN 115076653A
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- 206010049155 Visual brightness Diseases 0.000 abstract description 3
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
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- 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
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/14—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing polarised light
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- 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
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The application discloses car light system, including car light, polaroid, grating film and time schedule controller. The polaroid is arranged on a light-emitting path of the car lamp, the grating film has a polarization state, the polarization direction of the grating film is parallel to the polarization direction of the polaroid, and light beams emitted by the car lamp enter eyes of a driver after being modulated by the polaroid and the grating film in sequence. The preparation material of the grating film comprises a polymer dispersed liquid crystal material, and the time sequence controller outputs a time sequence signal to the grating film to control the time ratio of a voltage adding state to a voltage not adding state in a response period so as to adjust the average light intensity of the emergent light beam in the response period. The average light intensity of the emergent light beams in the response period is adjusted by utilizing the special attribute of the grating film in the vehicle lamp system and matching with the timing controller, so that the requirements of different use scenes on the ratio of attenuation to the brightness of the vehicle lamp and the visual brightness of the own vehicle lamp on the road surface are met.
Description
Technical Field
The embodiment of the application relates to the technical field of optics, in particular to a car lamp system.
Background
In the process of driving the motor vehicles, particularly in the process of driving at night, when two motor vehicles meet in opposite directions, strong light dizziness can be caused to eyes of opposite drivers to influence safe driving due to the fact that some drivers habitually forget to adjust high beam lamps into low beam lamps or some drivers are not good to use the high beam lamps intentionally when meeting, or some drivers privately modify the lamps into strong light lamps with larger power; other variations in driving conditions, such as: the brightness changes between daytime and nighttime when the driver drives for a long time, the driver frequently drives the road sections with good and poor road condition and visual field, the intensity of the vehicle lamp needs to be manually switched by the driver, the driver is very inconvenient, and the driving safety is easily influenced.
In order to solve the above problems, the prior art has a polarization device placed in front of the car lamp to make the light-emitting polarization of the car lamp be polarized light, so as to reduce the light-emitting brightness of the car lamp. And then a polarizing device is attached to the car window glass so as to achieve the effect of extinction of weak light. However, the utilization rate of light energy irradiated on the road surface by the own vehicle lamp of the driver can be reduced by at least half, and the driving safety of the driver can be seriously influenced at night or under the driving condition of poor visual field brightness.
Disclosure of Invention
In view of this, the present application provides a vehicle lamp system.
A car light system comprises a car light, a polaroid, a grating film and a time schedule controller;
the polaroid is arranged on a light-emitting path of the car lamp, the grating film has a polarization state, the polarization direction of the grating film is parallel to the polarization direction of the polaroid, and light beams emitted by the car lamp enter eyes of a driver after being modulated by the polaroid and the grating film in sequence;
the preparation material of the grating film comprises a polymer dispersed liquid crystal material, and the time sequence controller outputs a time sequence signal to the grating film to control the time ratio of a voltage adding state to a voltage not adding state in a response period so as to adjust the average light intensity of the emergent light beam in the response period.
In one embodiment, the response period of the timing controller is 42ms to 100 ms.
In one embodiment, the applied voltage state is an applied threshold voltage state.
In one embodiment, the average refractive index of the liquid crystal in the polymer dispersed liquid crystal material is the same as the refractive index of the polymer when in the applied threshold voltage state.
In one embodiment, the method for manufacturing the grating film comprises the following steps:
generating a first light beam by using a laser light source;
selecting a polarization state of the first light beam as a linear polarization state by using a linear polarization device;
splitting the first light beam into reference light and object light using a light path adjustment assembly;
and providing a grating recording plate, and carrying out primary exposure on the grating recording plate by using the reference light and the object light.
In one embodiment, the optical path adjusting component comprises a beam splitter, a first mirror, a first spatial filter, a second mirror, and a second spatial filter;
the step of splitting the first light beam into reference light and object light using the optical path adjusting member includes:
splitting the first light beam by using the beam splitter;
transmitting the split beam of light to the first spatial filter by using the first reflector for modulation so as to form the reference light;
and transmitting the other beam of split light to the second spatial filter by using the second reflecting mirror for modulation so as to form the object light.
In one embodiment, the linear polarizer is a wire grid or polarizer.
In one embodiment, the grating film is attached to a vehicle window pane.
In one embodiment, the lenticular film is attached to the eyewear.
In one embodiment, the polarizer is provided with a bracket fixed in front of the vehicle lamp.
In one embodiment, the polarizer is a quartz crystal with dichroism.
The application provides a car lamp system, including car lamp, polaroid, grating film and time schedule controller. The polaroid is arranged on a light-emitting path of the car lamp, the grating film has a polarization state, the polarization direction of the grating film is parallel to the polarization direction of the polaroid, and light beams emitted by the car lamp enter eyes of a driver after being modulated by the polaroid and the grating film in sequence. The preparation material of the grating film comprises a polymer dispersed liquid crystal material, and the time sequence controller outputs a time sequence signal to the grating film to control the time ratio of a voltage adding state to a voltage not adding state in a response period so as to adjust the average light intensity of the emergent light beam in the response period. The average light intensity of the emergent light beam in the response period is adjusted by utilizing the special properties of the grating film in the vehicle lamp system and matching with the timing controller, so that the brightness of the eye-entering light beam is adjusted, and the requirements of different use scenes on the ratio of attenuation to the brightness of the vehicle lamp and the visual brightness of the road surface illuminated by the vehicle lamp in the own party are met.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a vehicle lamp system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a vehicle lamp according to an embodiment of the present disclosure;
FIG. 3 is a simplified diagram of the structure of FIG. 1 provided by an embodiment of the present application;
fig. 4 is a schematic diagram illustrating a continuous period of a grating film controlled by a timing controller according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating the propagation path and polarization of an opposing vehicle light when the opposing vehicle light is directed into the human eye according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating a propagation path of diffuse reflection returning to eyes of a driver of the own party and a polarization condition of light when a first lamp provided by an embodiment of the present application is irradiated on a road surface;
FIG. 7 is a schematic structural diagram of a system for fabricating a grating film according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram illustrating the use of the grating film prepared by using fig. 6 according to an embodiment of the present disclosure.
Description of the reference numerals of the main elements
10. A vehicle lamp; 11. a lamp housing; 20. a polarizing plate; 21. a bracket; 30. a grating film; 40. a time schedule controller.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail through specific embodiments in conjunction with the accompanying drawings in the embodiments of the present application. It is obvious that the described embodiments are a part of the present application, not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without inventive work fall within the scope of protection of the present application.
Referring to fig. 1-8, the present application provides a vehicle lamp system. The vehicular lamp system includes a vehicular lamp 10, a polarizing plate 20, a grating film 30, and a timing controller 40.
The polarizer 20 is disposed on the light-emitting path of the car light 10, the grating film 30 has a polarization state, the polarization direction of the grating film 30 is parallel to the polarization direction of the polarizer 20, and the light emitted by the car light 10 sequentially passes through the polarizer 20 and the grating film 30 and then enters the eyes of the driver after being modulated. The preparation material of the grating film 30 includes polymer dispersed liquid crystal material. The timing controller 40 controls the ratio of the time of the voltage-applied state to the time of the voltage-unapplied state in a response period by outputting a timing signal to the grating film 30 to adjust the average light intensity of the emergent light beam in the response period.
The polarizer 20 is disposed on the light-emitting path of the vehicle lamp 10, and it is understood that the light emitted from the vehicle lamp may be polarized light. Referring to fig. 2, in an alternative embodiment, the vehicle lamp 10 and the polarizer 20 may be integrated inside the lamp housing 11. Alternatively, the polarizer 20 may be fixed inside the lamp housing 11 by using a bracket 21. The polarizing plate 20 may be formed by coating a polyethylene film with dichroic crystal iodine and sandwiching the coated film with a common glass. The polarizer 20 may also be a quartz crystal or other type of polarizer 20 having dichroism.
The grating film 30 may be a reflective holographic film or a transmissive holographic film. The grating film 30 may also be a reflective diffraction film or a transmissive diffraction film. The grating film 30 may include a substrate and a grating photosensitive layer disposed on the substrate. The substrate may be Indium Tin Oxide (ITO) conductive glass or other conductive substrate. The grating photosensitive layer can be a Holographic Polymer Dispersed Liquid Crystal (H-PDLC).
The grating portions of the grating film 30 formed based on HPDLC or PDLC are specifically a liquid crystal-rich region and a (polymer) polymer region, and the average refractive index of the liquid crystal for polarized light is different between two states of voltage application (exceeding a certain threshold voltage) and no voltage application, and even if a voltage below the threshold voltage is applied, the average refractive index of the liquid crystal for polarized light is partially changed (the average refractive index is smaller when the voltage value is larger, which is intermediate between the average refractive indices of the voltage application and the voltage application). After the average refractive index of the liquid crystal changes, the difference value between the average refractive index of the liquid crystal and the refractive index of the polymer part changes, namely the modulation degrees of the refractive indexes of the liquid crystal enrichment area and the polymer area of the grating change, and the final diffraction efficiency is further influenced. And different average intensities of diffracted light in a period are obtained through different duty ratios, namely different time duty ratios with different diffraction efficiencies, so that the modulation effect on brightness is realized.
The structure of the timing controller 40 is not limited as long as it can output a timing signal to the grating film 30. Alternatively, referring to fig. 4, the timing controller 40 may be a TFT thin film field effect transistor. The TFT thin film field effect transistor controls whether the voltage loaded on the grating thin film 30 is loaded (the voltage is applied to the threshold voltage of the liquid crystal) through the timing signals of the data line and the gate line to control the deflection orientation of the liquid crystal, and further controls the average refractive index of the liquid crystal in the grating thin film 30, that is, the average light intensity of the emergent light beam in the response period is adjusted, so that the grating thin film 30 forms two states: 1. when no voltage is loaded, the liquid crystal orientation is disordered, the average refractive index of the liquid crystal is different from that of the polymer, grating modulation is formed, and diffraction effect is generated; 2. when the threshold voltage of the liquid crystal is applied, the liquid crystal orientation is deflected, the average refractive index of the liquid crystal is the same as the refractive index of the polymer, the grating modulation disappears, and no diffraction effect occurs. Finally, in a response period, the TFT controls the time ratio of two states of pressurization and non-pressurization by outputting a time sequence signal, so that the time ratio of the grating film 30 playing a diffraction role is realized, and the average intensity of the light emitting time is finally controlled. The average intensity of time is based on the principle of human visual persistence, that is, a small time exists continuously when an optical signal enters human eyes and falls on retinas, and the individual difference is generally about 0.1-0.4 seconds, that is, the time less than 0.1 second is taken as a TFT timing control period in the future, that is, the time average intensity of light emission can be controlled by the ratio of two states of the grating film 30 in the period, and thus the non-uniform modulation of the light emission intensity is realized. In one embodiment, the response period of the timing controller may be set to 42ms to 100ms in consideration of the liquid crystal response time and the TFT refresh frequency.
Further, the timing controller 40 is utilized to output a timing signal to the grating film 30 to control the ratio of the time of the voltage state to the time of the non-voltage state in a response period, so as to adjust the average light intensity of the emergent light beam in the response period, and adjust the average light intensity of the emergent light beam in the response period, so as to attenuate the ratio of the brightness of the opposite vehicle lamp 10 according to different specific use scenes. It can be understood that, because the grating film 30 contains liquid crystal, the liquid crystal will be in two orientations when the grating film is electrified and not electrified, and then will show two refractive index matching degrees, and when the time ratio of the time sequence control pressurized state in a response period is 100%, and the average refractive index of the selected liquid crystal is the same as the refractive index of the polymer, at this time, the refractive index modulation degree is 0, the grating effect disappears, and the diffraction efficiency is considered to be 0, and when the time ratio of the time sequence control non-pressurized state in a response period is 100%, the difference between the average refractive index of the liquid crystal and the refractive index of the glass substrate is the largest, the grating effect is most obvious, the diffraction efficiency is the largest, and the preset diffraction efficiency value during preparation can be up to 100%. When the time ratio of the time sequence control pressurization state in one response period is any value between 0 and 100 percent, the refractive index modulation degree is between 0 and the maximum, namely the diffraction efficiency is between 0 and 100 percent, and the average light intensity in the response period is between the maximum value and the minimum value.
In one embodiment, when the gate film 30 is energized to a voltage exceeding the threshold voltage of the H-PDLC in a case where the luminance of the driving field environment is good and the attenuation function is not required, such as in the daytime, the time ratio of the pressurized state in one response period can be controlled in a time-series manner to be 100%, and the average refractive index of the liquid crystal in the polymer-dispersed liquid crystal material is the same as the refractive index of the polymer. At this time, the refractive index of the liquid crystal is the same as that of the polymer, and the light and dark stripes of the grating formed by the difference in refractive index disappear, and the diffraction effect on light disappears, which is equivalent to ordinary glass. Therefore, the situation that the driving safety is affected by reducing the brightness of light outside the vehicle window by nearly half under the conditions that the brightness of the driving visual field environment is good in daytime and the like and the attenuation function is not needed can be avoided.
As an example, referring to fig. 5, light emitted from a car is polarized light in a vertical direction, and enters eyes of a driver after being irradiated on a window glass of an opposite car, and since the polarization direction of the grating film 30 is also vertical, a light of the car lamp 10 is diffracted, and at this time, the reflective holographic grating device diffracts incident light. The diffraction efficiency of the reflective holographic grating device can be controlled (0-100%) by its fabrication.
Referring to fig. 6, the propagation path and the polarization of light are shown when the vehicle lamp 10 irradiates the road surface and the diffuse reflection returns to the eyes of the driver. The light emitted by the car light 10 is polarized light in the vertical direction, but after the car light irradiates on the road surface, due to the occurrence of diffuse reflection, the polarization state changes and changes into a natural light state (no specific polarization state), which is shown by the combination of arrows in all directions in the figure, and finally the diffuse reflection irradiates on the window glass and returns to the eyes of the driver in the own direction, so that the driver can clearly see the road surface condition. In the light intensity attenuation situation of the road, diffuse reflection loss occurs after the vehicle lamp 10 irradiates the road surface (but the attenuation is caused by the diffusion of the diffuse reflection direction, and also occurs when the vehicle lamp irradiates the road surface in the prior art or a common vehicle), and then the vehicle lamp irradiates the vehicle window glass, the light intensity can be divided into 50% of vertical polarization component and 50% of horizontal polarization component during calculation, the light intensity (50%) of the horizontal polarization component does not change and directly enters the eyes of the driver, the vertical polarization component (50%) acts on the grating film 30, and 100% of the light intensity is diffracted to other directions, namely the light intensity entering the eyes of the driver is 50%. However, the intensity of light finally entering the eyes of the driver can be changed by changing the voltage applied to the ITO conductive glass substrate, and the description is given by taking only one case (when the diffraction efficiency is 100% without voltage) as an example.
The final result is: the brightness of the opposite car light is 0%, and the brightness of the road surface irradiated by the own car light is 50%. (the best aim is to reduce the brightness and influence of the opposite car lights as much as possible, and not reduce the rear eye brightness of the road surface irradiated by the own car lights as much as possible). In addition, in the above case, the average light intensity in a response period is changed according to the ratio of the time of the voltage state and the time of the voltage state in the response period controlled by the timing controller 40 outputting the timing signal to the grating film 30, and there are the following cases: (many cases, just to name a few)
Compared with the prior art, the technical scheme of the application can change the brightness of the opposite vehicle lamp 10 and the brightness of the own vehicle lamp 10 irradiating the road surface to the eye when in use. And the technical scheme of the application provides more application scenes (under different driving conditions, the brightness of the opposite vehicle lamp 10 and the road surface incidence brightness irradiated by the own vehicle lamp 10 may be required to be different). For example, the diffraction efficiencies of 50% and 70% are also applicable.
In one embodiment, the method for manufacturing the grating film 30 includes:
generating a first light beam by using a laser light source;
selecting a polarization state of the first light beam as a linear polarization state by using a linear polarization device;
splitting the first light beam into reference light and object light using a light path adjustment assembly;
and providing a grating recording plate, and carrying out primary exposure on the grating recording plate by using the reference light and the object light.
In one embodiment, the linear polarizer device is a wire grid or polarizer 20.
In one embodiment, the optical path adjusting component comprises a beam splitter, a first mirror, a first spatial filter, a second mirror, and a second spatial filter;
the step of splitting the first light beam into reference light and object light using the optical path adjusting member includes:
splitting the first light beam by using the beam splitter;
transmitting the split beam of light to the first spatial filter by using the first reflector for modulation so as to form the reference light;
and transmitting the other beam of split light to the second spatial filter by using the second reflecting mirror for modulation so as to form the object light.
Specifically, referring to fig. 7, after combining the RGB three-color lasers into white light, the polarization state of the white light combined from RGB is selected as linear polarization by using a linear polarization device, the polarization state is in a vertical direction (the direction of the polarization state is the same as the polarization direction of the polarizer 20 in front of the car light 10 in future use, in this case, the vertical direction), the polarization state is split by a beam splitter, and then the split light is respectively turned by a corresponding reflector and filtered and expanded by a spatial filter, wherein a beam of expanded spherical wave is irradiated onto the grating recording plate (unexposed polymer dispersed liquid crystal material), the beam of light is defined as reference light, and the direction of the beam of light is also the direction of diffracted light in future use, and the direction of the future diffracted light is controlled by controlling the direction of the reference light. Another beam of spherical wave after being expanded is collimated into parallel light by the Fourier collimating lens, and then the parallel light irradiates on the grating recording plate, and the beam of light is defined as object light. The reason why the parallel light photographing is used is that the distance between the two cars is more than ten meters when the car lamp 10 is used, and the light emitted from the car lamp is approximate to parallel light. After the manufacturing is completed, the function of the grating film 30 can be realized, the exposure time is controlled by the exposure timer to reach the optimal exposure time of the polymer dispersed liquid crystal material, the diffraction efficiency is the maximum, and can basically reach or approach 100 percent, so as to realize the change requirement of the diffraction efficiency.
In one embodiment, the grating film 30 is attached to the window glass. Referring to fig. 8, the manufactured grating film 30 is attached to the window glass.
In one embodiment, the lenticular film 30 is attached to the glasses. The grating film 30 manufactured by exposure shooting is attached to the glasses to be manufactured into a glasses shape, and the manufacturing process of the grating film 30, the overall basic principle and the realized effect are not changed. But requires less area when attached to the eyeglasses, and is less costly to manufacture and less time-consuming to repair or replace. When the environment brightness of the driving vision field is better, the electric conduction can be selected to ensure that the average refractive index of the liquid crystal is the same as the refractive index of the exposed polymer of the photosensitive material so as to eliminate the grating effect, and the glasses can be directly taken off to eliminate the effect of attenuating the environmental brightness, so that the method is more direct and convenient. And the glasses are manufactured into a glasses form, so that the application scene can be expanded, and the glasses-free motorcycle, the trolley bicycle and even the bicycle can be worn for use when running.
The vehicle lamp system prepared by the application solves the problems that the vehicle lamp 10 and the ambient brightness and the whole light energy utilization rate are low in the human eyes of a driver cannot be adjusted in the prior art, and simultaneously solves the problem that the ambient brightness can be greatly attenuated under the condition of good driving visual field brightness such as daytime in the prior art.
In addition, in the prior art, the brightness of the opposite vehicle lamp and the brightness attenuation proportion of the own vehicle lamp irradiating the road surface are changed more singly, and a new technical path is provided in the application, so that more design conditions can be provided to match different attenuation proportions and use conditions.
In addition, when the timing controller 40 outputs the timing signal to the grating film 30 to control the time ratio of the voltage state to the non-voltage state in a response period during use, the modulation change of the average light intensity of 0-100% in the response period can be realized to adapt to the requirements of different use scenes on the ratio of the attenuation of the brightness of the front-view lamp 10 and the visual brightness of the road surface illuminated by the square vehicle lamp.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. Those skilled in the art will appreciate that the present application is not limited to the specific embodiments described herein, and that the features of the various embodiments of the present application may be partially or fully coupled or combined with each other and may be coordinated with each other and technically driven in various ways. Numerous variations, rearrangements, combinations, and substitutions will now become apparent to those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims (10)
1. A car light system is characterized by comprising a car light, a polaroid, a grating film and a time schedule controller;
the polaroid is arranged on a light-emitting path of the car lamp, the grating film has a polarization state, the polarization direction of the grating film is parallel to that of the polaroid, and light beams emitted by the car lamp enter eyes of a driver after being modulated by the polaroid and the grating film in sequence;
the preparation material of the grating film comprises a polymer dispersed liquid crystal material, and the time sequence controller outputs a time sequence signal to the grating film to control the time ratio of a voltage adding state to a voltage not adding state in a response period so as to adjust the average light intensity of the emergent light beam in the response period.
2. The vehicle light system according to claim 1, wherein a response period of the timing controller is 42ms to 100 ms.
3. The vehicle light system according to claim 1, wherein the voltage-added state is a threshold voltage-added state.
4. The vehicular lamp system according to claim 1, wherein an average refractive index of the liquid crystal in the polymer dispersed liquid crystal material is the same as a refractive index of the polymer when in the threshold voltage added state.
5. The vehicular lamp system according to claim 1, wherein the method of manufacturing the grating film comprises:
generating a first light beam by using a laser light source;
selecting a polarization state of the first light beam as a linear polarization state by using a linear polarization device;
splitting the first light beam into reference light and object light using a light path adjustment assembly;
and providing a grating recording plate, and carrying out primary exposure on the grating recording plate by using the reference light and the object light.
6. The lamp system of claim 5, wherein the optical path adjustment assembly includes a beam splitter, a first mirror, a first spatial filter, a second mirror, and a second spatial filter;
the step of splitting the first light beam into reference light and object light using the optical path adjusting member includes:
splitting the first light beam by using the beam splitter;
transmitting the split beam of light to the first spatial filter by using the first reflector for modulation so as to form the reference light;
and transmitting the other beam of split light to the second spatial filter by using the second reflector for modulation so as to form the object light.
7. The vehicular lamp system according to claim 5, wherein the linear polarizing device is a wire grid or a polarizing plate.
8. The vehicular lamp system according to claim 1, wherein the grating film is attached to a window glass.
9. The vehicular lamp system according to claim 1, wherein the grating film is attached to the glasses.
10. The lamp system of claim 1 wherein the polarizer is provided with a bracket secured to a front face of the lamp.
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| CN202210772202.2A CN115076653B (en) | 2022-06-30 | 2022-06-30 | Car light system |
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| CN202210772202.2A CN115076653B (en) | 2022-06-30 | 2022-06-30 | Car light system |
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| CN115076653B (en) | 2024-06-25 |
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