CN106646928A - Anti-dazzling device and control method thereof - Google Patents
Anti-dazzling device and control method thereof Download PDFInfo
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- CN106646928A CN106646928A CN201610973964.3A CN201610973964A CN106646928A CN 106646928 A CN106646928 A CN 106646928A CN 201610973964 A CN201610973964 A CN 201610973964A CN 106646928 A CN106646928 A CN 106646928A
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- magnetic field
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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
- G02F1/0136—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 for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
-
- 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
- G02F1/09—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 magneto-optical elements, e.g. exhibiting Faraday effect
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The embodiment of the invention provides an anti-dazzling device and a control method thereof, and relates to the field of optics. The polarization direction of incident light entering the anti-dazzling device can be changed, and then the intensity of emission light is reduced. The anti-dazzling device comprises a reflecting layer, a transparent magnetic medium layer and a linear polarized piece which are arranged in a stacked mode in sequence, the anti-dazzling device further comprises a magnetic field supplying part used for providing a magnetic field for the transparent magnetic medium layer, and the magnetic medium layer is used for changing the polarization direction of polarized light penetrating through the linear polarized piece under the action of the magnetic field.
Description
Technical field
The present invention relates to optical field, more particularly to a kind of anti-dazzle apparatus and its control method.
Background technology
When dazzling the eyes phenomenon to refer to that the eyes of people are subject to strong illumination suddenly, lose to eyes because optic nerve is stimulated
Control, eyes are closed by the light of nature or the physiological phenomenon of dark place object is not seen.
By taking the rearview mirror of automobile as an example, especially in driving at night, when car irradiates in the car followed by the headlight of vehicle
When on rearview mirror, front truck driver is often affected when rearview mirror is seen by glare, cause human eye receive light at this
There are greatest differences in the brightness before and after quarter, occur dazzling the eyes phenomenon, so as to causing moment blinding or forming local blind area, Jin Erzao
In pairs the perception of road speed and distance declines, and easily causes the generation of accident.
The content of the invention
Embodiments of the invention provide a kind of anti-dazzle apparatus and its control method, can change and be incident to the anti-glare dress
The polarization direction of the incident illumination in putting, so as to reduce the intensity of emergent light.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
On the one hand the embodiment of the present invention provides a kind of anti-dazzle apparatus, including the reflecting layer being cascading, transparent magnetic
Change medium layer, linear polarizer plate；The anti-dazzle apparatus also include magnetic field offer portion, for carrying to the transparent magnetization medium layer
For magnetic field；The transparent magnetization medium layer is used in the presence of the magnetic field, changes the polarization through the linear polarizer plate
The polarization direction of light.
Further, the magnetic direction is parallel with the plane that the linear polarizer plate is located or less parallel, and described
Magnetic direction is α with the transmission direction of principal axis angulation of the linear polarizer plate, wherein, α ≠ 0 °, 90 °.
Further, magnetic direction of the magnetic field at each position of the transparent magnetization medium layer is identical or approximate
It is identical.
Further, transmission direction of principal axis angulation α=45 ° of the magnetic direction and the linear polarizer plate.
Further, the magnetic field offer portion is magnetic field generator.
Further, the anti-dazzle apparatus also include optical sensor, for sensing the light intensity of incident illumination；The anti-glare
Device also includes controller, and the controller is connected with the optical sensor and the magnetic field generator, enters for basis
The light intensity magnitude for penetrating light controls whether to be powered to the magnetic field generator.
Further, the controller is additionally operable to control what the magnetic field generator was produced according to the light intensity magnitude of incident illumination
The size of magnetic field intensity.
Further, the magnetic field offer portion is permanent magnet.
On the other hand the embodiment of the present invention also provides a kind of rearview mirror, it is characterised in that including any of the above-described kind of anti-glare
Device.
Present aspect embodiment another further aspect also provides a kind of control method of anti-dazzle apparatus, and the anti-dazzle apparatus include light
Sensor and magnetic field generator, the control method includes：Obtain the light intensity value of incident illumination；When the light intensity value is more than or equal to
During the Intensity threshold, magnetic field generator is opened.
Further, described when the light intensity value is more than or equal to Intensity threshold, opening magnetic field generator includes：From pre-
If at least two light intensity interval in, determine that light intensity at the light intensity value is interval, at least two light intensity interval
Minima be the Intensity threshold；Obtain the interval corresponding signal of telecommunication size of light intensity at the light intensity value；According to institute
Signal of telecommunication size is stated, to the magnetic field generator input electrical signal.
The embodiment of the present invention provides a kind of anti-dazzle apparatus and its control method, and the anti-dazzle apparatus include stacking gradually setting
Reflecting layer, transparent magnetization medium layer, the linear polarizer plate put, wherein, when incident ray passes through linear polarizer plate, only with this
The parallel polarized light of linear polarizer plate between axlemolecules could be passed through, and be incident to transparent magnetization medium layer.The anti-dazzle apparatus are also wrapped
Magnetic field offer portion is included, for providing magnetic field to transparent magnetization medium layer so that whole magnetization medium layer is carried positioned at magnetic field offer portion
For magnetic field in.Because the transparent magnetization medium layer under the influence of a magnetic field, can change the polarization direction of polarized light, so that
When obtaining transparent magnetization medium layer of the polarized light of above-mentioned transmission linear polarizer plate in by being located at magnetic field, its polarization direction can
Change.On this basis, the polarized light that above-mentioned polarization direction changes is incident to reflecting layer, and reflected layer occurs instead
Penetrate, again by this transparent magnetization medium layer in magnetic field is located at, its polarization direction further changes, and again by line
Property polaroid, now, due to the polarization direction of the polarized light and the transmission direction of principal axis of linear polarizer plate it is different so that part
Polarization by reflection light can not pass through the linear polarizer plate, and then can reduce the flux of reflected light, and then reduce the intensity of emergent light.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of anti-dazzle apparatus provided in an embodiment of the present invention；
Fig. 2 a are the structural representation of another kind of anti-dazzle apparatus provided in an embodiment of the present invention；
Fig. 2 b are the structural representation of another kind of anti-dazzle apparatus provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of anti-dazzle apparatus including optical sensor provided in an embodiment of the present invention；
Fig. 4 is a kind of control method of anti-dazzle apparatus provided in an embodiment of the present invention；
Fig. 5 is the control method of another kind of anti-dazzle apparatus provided in an embodiment of the present invention.
Reference：
100- anti-dazzle apparatus；101- reflecting layer；The transparent magnetization medium layers of 102-；103- linear polarizer plates；104- magnetic fields
Offer portion；1041- magnetic field generators；105- optical sensors.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, the embodiment of the present invention provides a kind of anti-dazzle apparatus 100, including the reflecting layer being cascading
101st, transparent magnetization medium layer 102, linear polarizer plate 103, when when incident ray passes through linear polarizer plate 103, only with this
Linear polarizer plate 103 could be passed through through the first parallel polarized light A-A ' of direction of principal axis O-O ', and be incident to transparent magnetization medium
Layer 102.
Additionally, as shown in figure 1, the anti-dazzle apparatus 100 also include magnetic field offer portion 104, for transparent magnetization medium
Layer 102 provides magnetic field so that whole magnetization medium layer 102 is located in the magnetic field that magnetic field offer portion 104 provides.Due to the transparent magnetic
Changing medium layer 102 under the influence of a magnetic field, can change the polarization direction of polarized light, so that above-mentioned transmission linear polarizer plate
When by transparent magnetization medium layer 102 in the magnetic field, under the influence of a magnetic field, its is inclined for 103 the first polarized light A-A '
The direction that shakes changes, and forms the second polarized light B-B '.
On this basis, the second polarized light B-B ' that above-mentioned polarization direction changes, through in magnetic field
Reflecting layer 101 is incident to after transparent magnetization medium layer 102, and reflected layer 101 reflects, and is located in magnetic field again by this
Transparent magnetization medium layer 102, its polarization direction further changes, and the 3rd polarized light C-C ' is formed, and again by line
Property polaroid 103, now, due to the transmission direction of principal axis O- of polarization direction and the linear polarizer plate 103 of the 3rd polarized light C-C '
O ' is different, so that part polarization by reflection light C-C ' can not pass through the linear polarizer plate 103, and then can reduce reflected light
Flux, and then reduce the intensity of emergent light.
Herein it should be noted that first, above-mentioned transparent magnetization medium layer 102 is to refer to be presented every in magnetic field
The opposite sex, Jie of phase velocity that can be different with the polarized light generation perpendicular to magnetic direction to the polarized light parallel to magnetic direction
Matter, namely meet a class transparent medium of Cotton-Mouton effet (Cotton-Mouton Effect).Specifically, magnetization matchmaker
Matter layer can be made up of glass magneto-optic material, it is also possible to but crystalline ceramics magneto-optic memory technique is constituted, and the present invention is not limited this.
Wherein, Cotton-Mouton effet refers to, when the direction of propagation of light is vertical with magnetic field, parallel to the line of magnetic direction
The phase velocity of polarized light is different from the birefringent phenomenon produced perpendicular to the phase velocity of the line polarized light of magnetic direction, and parallel to magnetic
The phase contrast (△ nd) of the line polarized light of field direction and the line polarized light perpendicular to magnetic direction, with magnetic field intensity B size
Quadratic power is directly proportional, i.e. △ nd ∝ B2, wherein, d is the thickness of transparent magnetization medium layer, and B is magnetic field intensity, due to polarized light
After medium, there is phase in the linearly polarized light component parallel to magnetic direction with the linearly polarized light component perpendicular to magnetic direction
Potential difference (△ nd), so that the polarization direction of the polarized light deflects relative to original polarization direction.
Herein also, it should be noted that the deflection angle that above-mentioned polarization light polarization direction is produced is generally less than 90 °, will not wait
In 90 °, therefore for incident ray, be not in incidence be 90 ° of deflection, deflect 90 ° of feelings after the reflection of reflected layer again
Condition, so that polarized light is deflected after 180 ° completely through the phenomenon of linear polarizer plate 103.
Second, above-mentioned magnetic field offer portion 104 can be permanent magnet, such as Magnetitum or artificial metal's magnet etc.；Can also
It is electromagnet, such as magnetic field generator.
The magnetic field produced due to permanent magnet cannot manual control, so as to can cause the light of incidence no matter power in outgoing
Can weaken, so that the range of application of the anti-dazzle apparatus is restricted.And electromagnet is adopted, can be with manual control
The break-make of the signal of telecommunication being applied on the electromagnet, and then control whether to provide magnetic field to transparent magnetization medium layer 102.For example,
When incident ray is stronger, can be by opening above-mentioned magnetic field generator, so that transparent magnetization medium layer 102 is located at the magnetic field
In the magnetic field that generator is produced so that the polarization direction and the linear polarizer plate 103 through the polarized light of linear polarizer plate 103
It is different through direction of principal axis, so that exiting light beam intensity weakens.In the case of incident intensity is normal, the electromagnet is closed,
The polarization direction of the light of reflected layer reflection is parallel with the between axlemolecules of linear polarizer plate 103, such that it is able to completely through.
Therefore, currently preferred employing magnetic field generator, to realize the manual control to magnetic field, such that it is able to according to reality
Border need control emergent light power.
3rd, above-mentioned magnetic field can be the identical nonuniform magnetic fields of the identical uniform magnetic field in direction or direction, or side
To incomplete same magnetic field, as long as ensureing that there is the component vertical with incident light propagation direction in the magnetic field, enable to
Bright magnetization medium layer 102 changes the polarization direction of polarized light in the magnetic field.
Due to magnetic direction it is parallel with incident light propagation direction when, when polarized light through it is transparent magnetization medium layer 102 when, partially
The direction that shakes can not change；And when magnetic direction and incident light propagation direction are in a certain angle, only pass perpendicular to incident illumination
Broadcasting the magnetic-field component in direction can play a role；Meanwhile, pass with incident illumination in the component direction for meeting magnetic direction or magnetic field
Broadcast direction it is vertical when, in addition it is also necessary to so that the polarization direction of polarized light and the magnetic direction are not parallel also out of plumb, could meet
When polarized light transmission should be located at transparent magnetization medium layer 102 in the magnetic field, polarization direction changes.
Therefore, in order that transparent magnetization medium layer 102 can effectively change the polarization direction of polarized light in magnetic field, this
Invention is preferred, and the magnetic direction is parallel with the plane that linear polarizer plate 103 is located or less parallel, due to passing through linearly
The optical propagation direction of polaroid 103 is substantially distributed on the direction of the vertical linear polarizer plate 103 or near normal is linearly inclined
On the direction of mating plate 103, so by magnetic direction is set to linear polarizer plate 103 is located plane is parallel or less parallel
When, enable to that magnetic direction is vertical with the direction of propagation of light or near normal.Simultaneously in order to meet the magnetic direction with it is inclined
Shake light polarization direction with should i.e. uneven also out of plumb, the transmission direction of principal axis of the setting magnetic direction and linear polarizer plate into
Angle be α, and α ≠ 0 °, 90 °.
On this basis, in order to avoid in parallel or less parallel linear polarizer plate 103 graphic memory in different directions
Magnetic field when, between different magnetic directions occur interference, and then cause polarized light polarization direction adjustment when occur offset
Or influence each other, it is currently preferred, as shown in figure 1, magnetic field of the magnetic field at each position of transparent magnetization medium layer
Direction is identical or approximately the same such that it is able to enable the transparent magnetization medium layer 102 in the magnetic field further effective
The polarization direction of polarized light is adjusted.
Below to it is above-mentioned can provide parallel with the place plane of linear polarizer plate 103 or approximately parallel magnetic direction and
Concrete setting of the magnetic direction in the identical or approximately uniform magnetic field offer portion 104 of the position of transparent magnetization medium layer
Situation is described further.
For example, (can not affect away from the side of linear polarizer plate 103 in transparent magnetization medium layer 102 as shown in Figure 2 a
The incident and outgoing of light) magnetic field offer portion 104 is set, specifically, the magnetic field offer portion 104 can be solenoid, by the helical
Circle provide magnetic direction is parallel with the plane that linear polarizer plate 103 is located or less parallel.
Again for example, magnetic field offer portion 104 can be set in the transparent side of magnetization medium layer 102, specifically as shown in Figure 2 b
, in the transparent magnetization medium layer 102 relative both sides, opposite magnetic pole, magnetic direction and the linear polarizer plate 103 of formation are set
The plane at place is parallel or less parallel.
Herein it should be noted that the opposite magnetic pole of the above-mentioned both sides relative positioned at transparent magnetization medium layer 102 can be
Opposite magnetic pole on two different magnets；Can also be located at a magnet on two opposite magnetic poles, such as U-shaped magnet
Two opposite magnetic pole ends, the present invention this is not construed as limiting, can be set according to the actual needs.
On this basis, it is currently preferred, angle formed by the transmission direction of principal axis of above-mentioned magnetic direction and linear polarizer plate
Degree α=45 °, in the case where magnetic field intensity is certain, the polarized light is in the component parallel to magnetic direction and perpendicular to magnetic field side
To component it is equal with the angle of magnetic direction be 45 °, enable to polarized light component parallel to magnetic direction with it is vertical
Maximum is reached in the phase contrast of the polarized light component of magnetic direction, and then the change of polarized direction of polarized light is maximum.
Additionally, in order to realize the intelligentized control method to the anti-dazzle apparatus 100, in the case where incident illumination is relatively strong, without the need for
The break-make of above-mentioned magnetic field generator is manually controlled, as shown in figure 3, the anti-dazzle apparatus 100 also include optical sensor 105, is used for
The light intensity of sensing incident illumination；Meanwhile, the anti-dazzle apparatus also include controller (not shown), and controller and optical sensor
105 and magnetic field generator 1041 be connected, for being controlled whether to magnetic field generator 1041 according to the light intensity magnitude of incident illumination
Power supply.
Specifically, current light intensity value is detected by optical sensor 105, if the light intensity value is more than default light intensity threshold
Value, controller control magnetic field generator 1041 is opened, and magnetic field generator 1041 produces magnetic field so that whole magnetization medium layer 102
In this magnetic field, and this is under the influence of a magnetic field, changes the polarization direction of the polarized light through linear polarizer plate 103.Example
Such as, default Intensity threshold is 100cd, when it is 150cd that optical sensor 105 detects current light intensity value, then controller control
Magnetic field generator 1041 is opened.
Further, controller noted above is additionally operable to control what magnetic field generator 1041 was produced according to the light intensity magnitude of incident illumination
The size of magnetic field intensity, so that the anti-dazzle apparatus 100 can control magnetic field according to the intensity size of extraneous incident ray
The size of intensity, and then the deflection size to the polarization direction of the polarized light through linear polarizer 103 is controlled, so as to reality
The control of the light intensity of existing emergent light.
For example, when by optical sensor 105 detect current light intensity value be 150cd when, controller by control the signal of telecommunication
The size for making magnetic field intensity B of the generation of magnetic field generator 1041 is 50A/m；When detecting current light intensity by optical sensor 105
Be worth for 250cd when, controller by control the signal of telecommunication make magnetic field generator 1041 produce magnetic field intensity B size be 80A/m；
When by optical sensor 105 detect current light intensity value for 50cd (less than Intensity threshold) when, controller is not by sending out to magnetic field
Raw device 1041 provides the signal of telecommunication, and magnetic field generator 1041 is remained off, and now magnetizes the direction of medium 102 pairs of polarized light of layer
Do not make any change, by after the reflected layer 101 of the polarized light of linear polarizer plate 103 all through the linear polarizer plate 103.
It should be noted that due to the line polarized light in polarized light parallel to magnetic direction and the line perpendicular to magnetic direction
The phase contrast (△ nd) of polarized light, is directly proportional, i.e. △ nd ∝ B with the quadratic power of magnetic field intensity B size2, i.e. phase contrast △
Nd is controlled by magnetic field intensity B, as △ nd=λ/4+m λ, through linear polarizer plate 103 polarized light in Jing
After crossing before and after reflecting layer 101 the transparent magnetization medium layer 102 twice in positioned at magnetic field, polarization direction and linear polarizer
103 between axlemolecules are vertical, now dull thread outgoing.In the case, in for some applications, it should avoid △ nd=as far as possible
The situation of λ/4+m λ, such as application of the anti-dazzle apparatus in automobile rearview mirror, then should control the size of magnetic field intensity B,
Avoid △ nd=λ/4+m λ, so as to avoid incident illumination cannot outgoing, cause human eye cannot by rearview mirror observe rear car
Condition.
The embodiment of the present invention also provides a kind of rearview mirror, including aforesaid anti-dazzle apparatus, with carrying with previous embodiment
For anti-dazzle apparatus identical structure and beneficial effect.Due to previous embodiment structure to anti-dazzle apparatus and beneficial
Effect is described in detail, and here is omitted.
The embodiment of the present invention also provides a kind of control method of anti-dazzle apparatus, the anti-dazzle apparatus include optical sensor and
Controller, as shown in figure 4, the control method of the anti-dazzle apparatus includes：
Step S101, the light intensity value for obtaining incident illumination.
Specifically, the light intensity value of current incident illumination is obtained by optical sensor 105.
Step S102, when light intensity value be more than or equal to Intensity threshold when, open magnetic field generator.
Specifically, it is assumed that the Intensity threshold of systemic presupposition is 100cd, when the light of the current incident illumination obtained in step S101
When intensity values are 50cd (being less than Intensity threshold 100cd), magnetic field generator 1041 is remained off, and now magnetizes medium layer 102
Any change is not made to the direction of polarized light, by after the reflected layer 101 of the polarized light of linear polarizer plate 103 all through the line
Property polaroid 103.When the light intensity value of the current incident illumination obtained in step S101 is 150cd, controller control magnetic field occurs
Device 1041 is opened, and magnetic field generator 1041 produces magnetic field so that whole magnetization medium layer 102 is located in the magnetic field, and in the magnetic
In the presence of, change the polarization direction of the polarized light through linear polarizer 103 so that the polarization direction of emergent ray and line
Property polaroid 103 transmission direction of principal axis it is different so that the intensity decreases of emergent ray.
In addition, it is necessary to explanation, when can be that current light intensity value is more than Intensity threshold in this step, opens magnetic field and occurs
Device；When current light intensity value is less than or equal to Intensity threshold, magnetic field generator is closed.Current light is can also be in this step
When intensity values are more than or equal to Intensity threshold, magnetic field generator is opened；When current light intensity value is less than Intensity threshold, magnetic field generator is in
Closed mode.
Further, as shown in figure 5, in above-mentioned steps 102 when light intensity value is more than or equal to Intensity threshold, opening magnetic field
Generator is specifically included：
Step S1021, from default at least two light intensity interval, determine that light intensity at light intensity value is interval, at least
Minima in two light intensity intervals is Intensity threshold.
For example, three light intensity of systemic presupposition it is interval be respectively [100cd～200cd), [200cd～300cd), [300cd
～∞), and minima is that Intensity threshold 100cd is Intensity threshold in three light intensity intervals.
The interval corresponding signal of telecommunication size of light intensity at step S1022, acquisition light intensity value.
For example, the light intensity of systemic presupposition it is interval [100cd～200cd), [200cd～300cd), [300cd～∞) correspondence
Signal of telecommunication size be respectively 10A, 15A, 20A, for example, when obtain in step S101 current incident illumination light intensity value be 150cd
When, light intensity value 150cd be located at light intensity it is interval [100cd～200cd), controller is obtained and the interval corresponding value of electrical signals
10A；When the light intensity value that current incident illumination is obtained in step S101 is 250cd, it is interval that light intensity value 250cd is located at light intensity
[200cd～300cd), controller is obtained and interval corresponding value of electrical signals 15A；When obtaining current incident illumination in step S101
Light intensity value when being 350cd, light intensity value 350cd be located at light intensity it is interval [300cd～∞), controller obtains corresponding with the interval
Value of electrical signals 20A.
Step S1023, according to signal of telecommunication size, to magnetic field generator input electrical signal.
Specifically, for example, when the value of electrical signals obtained in step 1022 is 10A, controller is to magnetic field generator 1041
The signal of telecommunication of 10A is provided, so that the magnetic field intensity that magnetic field generator 1041 is produced is 50A/m.When what is obtained in step 1022
Value of electrical signals is 15A, and controller provides the signal of telecommunication of 10A to magnetic field generator 1041, so that magnetic field generator 1041 is produced
Magnetic field intensity be 80A/m.When the value of electrical signals obtained in step 1022 is 20A, controller is to magnetic field generator 1041
The signal of telecommunication of 20A is provided, so that the magnetic field intensity that magnetic field generator 1041 is produced is 100A/m.
So, can according in different magnetic field intensity control polarized light parallel to magnetic direction line polarized light with
Control perpendicular to the phase contrast (△ nd) of the line polarized light of magnetic direction, and then the variable quantity to the polarization direction of polarized light
System, realizes the strong and weak control of emergent ray.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the scope of the claims.
Claims (11)
1. a kind of anti-dazzle apparatus, it is characterised in that including the reflecting layer being cascading, transparent magnetization medium layer, linear
Polaroid；
The anti-dazzle apparatus also include magnetic field offer portion, for providing magnetic field to the transparent magnetization medium layer；
The transparent magnetization medium layer is used in the presence of the magnetic field, and change is through the polarized light of the linear polarizer plate
Polarization direction.
2. anti-dazzle apparatus according to claim 1, it is characterised in that the magnetic direction and the linear polarizer plate institute
Plane is parallel or less parallel, and the magnetic direction is with the transmission direction of principal axis angulation of the linear polarizer plate
α, wherein, α ≠ 0 °, 90 °.
3. anti-dazzle apparatus according to claim 2, it is characterised in that the magnetic field is in the transparent magnetization medium layer
Magnetic direction at each position is identical or approximately the same.
4. anti-dazzle apparatus according to claim 3, it is characterised in that the magnetic direction and the linear polarizer plate
Through direction of principal axis angulation α=45 °.
5. anti-dazzle apparatus according to any one of claim 1-4, it is characterised in that the magnetic field offer portion is that magnetic field is sent out
Raw device.
6. anti-dazzle apparatus according to claim 5, it is characterised in that the anti-dazzle apparatus also include optical sensor,
For sensing the light intensity of incident illumination；
The anti-dazzle apparatus also include controller, and the controller is connected with the optical sensor and the magnetic field generator
Connect, for being controlled whether to be powered to the magnetic field generator according to the light intensity magnitude of incident illumination.
7. anti-dazzle apparatus according to claim 6, it is characterised in that the controller is additionally operable to the light according to incident illumination
The powerful little size for controlling the magnetic field intensity that the magnetic field generator is produced.
8. anti-dazzle apparatus according to claim 1, it is characterised in that the magnetic field offer portion is permanent magnet.
9. a kind of rearview mirror, it is characterised in that including the anti-dazzle apparatus described in any one of claim 1-8.
10. a kind of control method of the anti-dazzle apparatus described in any one of claim 6 to 7, it is characterised in that the controlling party
Method includes：
Obtain the light intensity value of incident illumination；
When the light intensity value is more than or equal to Intensity threshold, magnetic field generator is opened.
11. control methods according to claim 10, it is characterised in that described when the light intensity value is more than or equal to described
During Intensity threshold, opening magnetic field generator includes：
From default at least two light intensity interval, determine that the light intensity at the light intensity value is interval, at least two light
Minima in strong interval is the Intensity threshold；
Obtain the interval corresponding signal of telecommunication size of light intensity at the light intensity value；
According to the signal of telecommunication size, to the magnetic field generator input electrical signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610973964.3A CN106646928A (en) | 2016-10-28 | 2016-10-28 | Anti-dazzling device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610973964.3A CN106646928A (en) | 2016-10-28 | 2016-10-28 | Anti-dazzling device and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106646928A true CN106646928A (en) | 2017-05-10 |
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| CN201610973964.3A Pending CN106646928A (en) | 2016-10-28 | 2016-10-28 | Anti-dazzling device and control method thereof |
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| CN (1) | CN106646928A (en) |
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| CN108382308A (en) * | 2018-01-23 | 2018-08-10 | 信利光电股份有限公司 | A kind of anti-glare vehicular rear mirror |
| CN115032832A (en) * | 2022-05-12 | 2022-09-09 | 重庆惠科金渝光电科技有限公司 | Backlight module and display device |
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| CN108382308A (en) * | 2018-01-23 | 2018-08-10 | 信利光电股份有限公司 | A kind of anti-glare vehicular rear mirror |
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| CN115032832A (en) * | 2022-05-12 | 2022-09-09 | 重庆惠科金渝光电科技有限公司 | Backlight module and display device |
| CN115032832B (en) * | 2022-05-12 | 2024-05-17 | 重庆惠科金渝光电科技有限公司 | Backlight module and display device |
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