JPH10227907A - Antidazzle mirror - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evade a dimming element from being fixed in an antidazzle state even when electric fault is caused. SOLUTION: In this antidazzle mirror provided with the dimming element 2 which enters a light-transmissive state when applied with a voltage from the main power source 41 and decreases in light transmissivity when applied with no voltage to enter a translucent state, the dimming element 2 is provided with a preliminary power source 46 which applies a voltage preliminarily in addition to the main power source 41. The dimming element 2 is normally in the light-transmissive state when the voltage from the main power source 41 is applied, so this mirror functions as a normal mirror which has a large reflection factor and when the voltage is not applied, the dimming element 2 enters the translucent state, so the reflection factor becomes small to provided antidazzle effect. If the main power source 41 gets out of order, the dimming element 2 can be applied with the voltage from the preliminary power source 46. The dimming element 2 which is applied with the voltage from the preliminary power source 6 enters the light-transmissive state, so the antidazzle mirror enters a non-antidazzle state wherein the reflection factor is large.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-glare mirror that can be used as a vehicle interior mirror or the like, and more particularly to an anti-glare mirror whose presence or absence of an anti-glare effect can be adjusted by the presence or absence of an applied voltage.

[0002]

2. Description of the Related Art Generally, an anti-glare mirror having an anti-glare function for reducing glare caused by a headlight of a following vehicle during night driving is used as a vehicle interior mirror. Conventionally, such an anti-glare mirror exhibits a glare effect by changing the reflectivity by mechanically changing the mirror surface angle, and a glare effect by changing the reflectivity of the mirror by electrical control. What is known is.

A typical example of an anti-glare mirror that exhibits an anti-glare effect by the above electrical control is a liquid crystal anti-glare mirror having a liquid crystal cell and an optical film provided in front of a mirror surface (Japanese Patent Laid-Open No. 58-37601). Etc.). In this liquid crystal anti-glare mirror, the liquid crystal cell and the optical film function as a light control element by controlling the voltage applied to the liquid crystal cell. That is, in a state where a voltage is applied to the liquid crystal cell, the dimming part composed of the liquid crystal cell and the optical film is in a translucent state due to the relationship between the liquid crystal cell in which the liquid crystal molecules are oriented in a specific direction and the optical film. Transmits most of the light. Therefore, when a voltage is applied, the anti-glare mirror has a large reflectance and does not exhibit an anti-glare effect. On the other hand, when no voltage is applied to the liquid crystal cell, the liquid crystal molecules are diffused, and the light modulating portion composed of the liquid crystal cell and the optical film has a reduced translucency due to the relationship with the optical film and is in a semi-transparent state. Only light that vibrates in a certain direction is transmitted. Therefore, when no voltage is applied, the anti-glare mirror has a low reflectance and exhibits an anti-glare effect.

[0004]

As described above, the liquid crystal anti-glare mirror functions as a normal mirror having a large reflectivity when a voltage is applied, and has a low reflectivity when no voltage is applied to exhibit an anti-glare effect. . However, according to such an embodiment, there are the following inconveniences when an electrical failure occurs.
In other words, if an electrical failure occurs, no voltage is applied from the power supply to the liquid crystal cell, so immediately after the failure occurs, the anti-glare mirror is always in an anti-glare state in which the reflectance is reduced,
This fixed anti-glare condition cannot be avoided unless the electrical fault is repaired.

The present invention has been made in view of the above circumstances, and provides an anti-glare mirror which can be prevented from being fixed in an anti-glare state even when an electrical failure occurs. Is a technical problem to be solved.

[0006]

[Means for Solving the Problems]

(1) The anti-glare mirror according to claim 1, which solves the above-mentioned problem, has a translucent state when a voltage is applied from a main power supply, and has a translucent state with a reduced transmissivity when no voltage is applied. An anti-glare mirror provided with a dimming element, characterized in that a separate power supply for applying a voltage to the dimming element is provided separately from the main power supply.

(2) The anti-glare mirror according to the second aspect of the present invention comprises a dimming element in which a particle-dispersed dimming material having fluidity is sealed in a transparent cell. The element has an anti-glare mirror in which, when the particle-dispersed light modulating material is electrically controlled, the light-transmitting state is applied when a voltage is applied, and the light-transmitting property is reduced when a voltage is not applied, resulting in a semi-transmissive state. Wherein a discharging mechanism for opening the cell and discharging the particle-dispersed light control material from the cell is provided.

(3) The anti-glare mirror according to the third aspect of the present invention comprises a dimming element in which a particle-dispersed dimming material having fluidity is sealed in a transparent cell. The element is in a translucent state when a voltage is applied and the translucency is reduced when no voltage is applied, and the semi-transparent state is obtained when the particle-dispersed light modulating material is electrically controlled from a main power supply. In the anti-glare mirror, a standby power supply for preliminarily applying a voltage to the light control element when the main power supply stops operating, and opening the cell to discharge the particle-dispersed light control material from the cell And a discharge mechanism for causing the discharge.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) The anti-glare mirror according to claim 1, which is in a light-transmitting state when a voltage is applied from a main power supply, and has a semi-transmissive state in which the light-transmitting property is reduced when no voltage is applied. It has. This light control device may be installed separately from the mirror on the front side of the mirror surface, or by vapor-depositing a reflective material such as aluminum on the back surface of the transparent substrate on the back side constituting the cell of the light control device. Alternatively, the mirror and the dimming element may be integrally formed.

The light control element is not particularly limited as long as the light control element is in a light-transmitting state when a voltage is applied, and is reduced in a light-transmitting state when no voltage is applied to be in a semi-light-transmitting state.
For example, a dimming element used for the anti-glare mirror according to claim 2, that is, a dimming element in which a particle-dispersed dimming material having fluidity is sealed in a transparent cell, and has a fluidity. It is also possible to adopt a light control element using a solid light control material that is not used.

A so-called SPD (Suspended Particle) is used as a light control element in which the above-mentioned fluid dispersion particle light control material is sealed in a transparent cell.
(Display) element, a liquid crystal element, an electrophoretic element, or the like can be used. The SPD element is such that, when a voltage is applied, the particles are oriented in a direction perpendicular to the cell substrate and decolored, and when the voltage is not applied, the particle orientation is lost and the particles are randomly dispersed and colored. A particle-dispersed light modulating material is sealed in a transparent cell.
More specifically, the particle-dispersed light modulating material is obtained by dispersing suspended particles of a rod-like, needle-like, or thin platelet-like polarizing substance in a dispersion medium. As the polarizing substance, for example, a crystal of periodate of quinine sulfate called herapatite,
Fine needle-like polarizing crystals having dichroism and exhibiting an electric dipole moment can be given. Examples of the dispersion medium include organic solvents such as fatty acid esters, aromatic esters, and aliphatic halides, and water. A transparent electrode made of a transparent conductive film such as an ITO film is formed on each of the opposed inner surfaces of the cell, and a voltage is applied between these electrodes from a main power supply.

The above-mentioned liquid crystal element is a particle-dispersed dimming material composed of liquid crystal whose molecular orientation is twisted by 90 degrees from a direction parallel to a cell substrate to a direction perpendicular thereto by application of a voltage, specifically, a dye-containing material. It is composed of a liquid crystal cell in which a guest host liquid crystal, a twisted nematic liquid crystal and the like are sealed in a transparent cell, and an optical film such as a polarizing plate. In addition,
Transparent electrodes are formed on the opposing inner surfaces of the liquid crystal cell, similarly to the SPD element. Further, a polarizing film as an optical film may be formed directly on the substrate of the liquid crystal cell.

The above-mentioned electrophoretic element is obtained by enclosing a dispersion in which positively or negatively charged electrophoretic particles are dispersed using an insulating liquid as a dispersion medium in a transparent cell. Transparent electrodes are respectively formed on opposed inner surfaces of the cell, and at least one of the transparent electrodes is formed in a stripe shape or a mesh shape. In this electrophoretic element, when no voltage is applied, the electrophoretic particles are uniformly dispersed in the dispersion and colored, and when the voltage is applied, the particles move by electrophoresis and are formed into a stripe or mesh shape. The color is erased by attaching to the transparent electrode. Examples of the electrophoretic particles include various organic pigments and inorganic pigments. Examples of the dispersion medium include halides such as tetrachloroethylene.

In the anti-glare mirror according to the first aspect of the present invention, the dimming element is provided separately from a main power supply for applying a voltage between the electrodes of the dimming element in a normal time when no electrical failure occurs. Is provided with a preliminary power supply for preliminarily applying a voltage. The spare power supply may be a capacitor or a rechargeable battery provided in the middle of an electric circuit for applying a voltage between the electrodes from the main power supply.

In the anti-glare mirror according to the first aspect, it is preferable to provide a display means for notifying a driver or the like that an electric failure has occurred in the main power supply. According to this aspect, the driver or the like can immediately recognize that an electrical failure has occurred in the main power supply by looking at the display means,
Drivers can take emergency measures safely. As this display means, a light emitting diode (LED) or the like can be adopted.

In the anti-glare mirror according to the first aspect of the present invention, the dimming element is in a light-transmitting state when a voltage is applied from the main power supply during a normal time when no electrical failure occurs in the main power supply. It functions as a normal mirror having a large reflectance, and the light control element is in a semi-transmissive state when no voltage is applied. Then, when the main power supply fails electrically, a voltage can be applied to the light control element from the backup power supply. Since the dimming element to which a voltage is applied from the standby power supply is in a light transmitting state, the anti-glare mirror is in a non-glare state having a large reflectance. Therefore, this anti-glare mirror can ensure a non-glare state while a voltage is applied to the dimming element from the standby power supply even when an electrical failure occurs, and It is possible to temporarily avoid being fixed in the anti-glare state due to the semi-transparent state.

(Embodiment 2) The anti-glare mirror according to the second aspect is provided with a light control element in which a particle-dispersed light control material having fluidity is sealed in a transparent cell. This light control device may be installed separately from the mirror on the front side of the mirror surface, or by vapor-depositing a reflective material such as aluminum on the back surface of the transparent substrate on the back side constituting the cell of the light control device. Alternatively, the mirror and the dimming element may be integrally formed.

The light modulating element has a semi-transmissive state in which the particle-dispersed light modulating material is electrically controlled to be in a light transmissive state when a voltage is applied and to have a low light transmissivity when no voltage is applied. As such a light control element, various light control elements in which the particle-dispersed light control material described in the first embodiment is sealed in a transparent cell can be used.

The anti-glare mirror according to a second aspect of the present invention includes a discharge mechanism for opening the cell and discharging the particle-dispersed light modulating material from the cell. The discharge mechanism is not particularly limited as long as it is a mechanism capable of discharging the particle-dispersed light modulating material having fluidity enclosed in the cell. For example, a through-hole is provided in the cell substrate, and the through-hole is normally closed with a pad made of rubber or resin, and the pad is removed from the through-hole in the event of an electrical failure. Or by forcibly peeling off one of a pair of cell substrates joined via a spacer from the spacer, thereby causing the particle-dispersed light modulating material in the cell to flow out of the cell. Outflow. Incidentally, the former means for providing a through hole is a dimming element having a relatively large cell gap,
That is, it is preferable that the means for peeling off the entire cell substrate, which is applied to the SPD element or the electrophoretic element, be applied to a light control element having a relatively small cell gap, that is, the liquid crystal element. Also, the pad in the former means or the one cell substrate in the latter means is normally urged by an elastic member and pressed against the through-hole or the spacer, and in the event of an electrical failure, this elastic member is The pad or one of the cell substrates may be removed from the pressing portion against the urging force. Further, in the event of an electrical failure, when the pad in the former means or one of the cell substrates in the latter means is to be removed in an emergency, it may be performed manually by operating a switch or automatically by using an actuator. You may.

Further, in the anti-glare mirror according to the second aspect, similarly to the anti-glare mirror according to the first aspect, display means for notifying a driver or the like that an electric failure has occurred in the main power supply is provided. Is preferred. According to this aspect, the driver or the like can immediately recognize that an electrical failure has occurred in the main power supply by looking at the display means. Actions can be taken.

In the anti-glare mirror having the above structure, when a normal state in which no electric failure occurs, the particle-dispersed dimming material sealed in the cell of the dimming element is electrically controlled, so that the voltage is reduced. The dimming element is in a light-transmitting state when voltage is applied, and thus functions as a normal mirror having a large reflectance. When the voltage is not applied, the light-modulating element is in a semi-light-transmitting state, so that the reflectance is small and the glare is reduced. It is effective.

If an electrical failure occurs, no voltage is applied from the power supply to the light control element. Immediately after the failure occurs, the anti-glare mirror enters an anti-glare state in which the reflectance is reduced. . At this time, by operating the discharge mechanism, the particle-dispersed light modulating material sealed in the cell of the light modulating element can be discharged from the cell. When the particle-dispersed dimming device is discharged, the dimming device formed of a transparent cell is in a translucent state, and thus the anti-glare mirror is in a non-glare state having a large reflectance. Therefore, this anti-glare mirror, even if an electrical failure occurs, the dimming element is in a semi-transparent state and is fixed in the anti-glare state, by operating the discharge mechanism, The anti-glare state can be restored to the non-glare state.

(Embodiment 3) An anti-glare mirror according to a third embodiment is a combination of the anti-glare mirror according to the first embodiment and the anti-glare mirror according to the second embodiment. And a combination of the configurations described in the second embodiment. Therefore, the anti-glare mirror operates in the same manner as the anti-glare mirror according to the second aspect in a normal state where no electrical failure occurs in the main power supply.

When an electrical failure occurs in the main power supply, a voltage is applied to the dimming element from the standby power supply immediately after the occurrence of the failure, so that the anti-glare mirror operates in the same manner as before the occurrence of the electrical failure. In addition, a non-glare state having a large reflectance can be maintained. Then, during the application of the voltage from the standby power supply,
By operating the discharge mechanism and discharging the particle-dispersed light modulating material sealed in the cell of the light-modulating element from the cell, even if the voltage application from the standby power supply is stopped, the particle-dispersed light modulating material is removed. Since light transmission can be ensured by the dimming element formed of a transparent cell that has been discharged, the anti-glare mirror can ensure a non-glare state with a large reflectance.

Therefore, even if an electrical failure occurs, the anti-glare mirror prevents the dimming element from being in a semi-transparent state and being fixed to the anti-glare state immediately after the occurrence of the failure. It is possible to maintain the non-glare state by operating the discharge mechanism during the application of the voltage from the standby power supply, so that the non-glare state is maintained even after the application of the voltage from the standby power supply is stopped. Can be.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the anti-glare mirror of the present invention will be described specifically. (Embodiment 1) As shown in the schematic cross-sectional view of FIG. 1 and the plan view of FIG. 4, the anti-glare mirror of this embodiment was fixed and held in a mirror case 1 made of resin. A light control device 2 with a mirror and a discharge mechanism 3 are provided.

The mirror-equipped dimming element 2 is a device in which a particle-dispersed dimming material having fluidity is sealed in a transparent cell, and a pair of dimming elements arranged to face each other with a spacer 21 interposed therebetween. Of transparent glass substrates 22a and 22b, and I
Transparent electrodes 23a and 23b made of a TO film and a transparent glass substrate 22 on the back side (the left side in FIGS. 2 and 3; the same applies hereinafter).
b, and an SPD liquid 25 as a particle-dispersed light modulating material enclosed in a closed space formed by a pair of transparent glass substrates 22a and 22b and a spacer 21. I have. The cell gap is set to about 20 to 100 μm by the spacer 21.

The SPD liquid 25 is obtained by dispersing herapatite and phenanthroline as polarizing substances in ditridecyl phthalate as an organic solvent. Also,
The transparent glass substrate 21b on the back side has an aluminum film 24 as a reflective material formed on the back side thereof,
Functions as a mirror. This transparent glass substrate 21b on the back side
The transparent electrode 23b and the aluminum film 24 formed on the transparent glass substrate 21b are respectively provided with through holes 26 at upper and lower portions, respectively.

The discharge mechanism 3 is fixed to a flat plate 31 made of resin disposed on the back side of the dimming element 2 and upper and lower portions of the flat plate 31, respectively.
Rubber pads 32, 3 capable of closing liquid-tight 6, 6
2, fixed to the lower end of the flat plate 31, extended below the dimming element 2, and its tip projects forward from the front side of the mirror case 1 (the right side in FIGS. 2 and 3; the same applies hereinafter). And a pair of springs 3 disposed on the rear side of the flat plate 31 to press and urge the flat plate 31 toward the front side.
4 and 34.

A voltage is supplied to the light control element 2 from the electric circuit 4 shown in FIG. The electric circuit includes a main power supply 41 for applying a voltage to the dimming element 2 in a normal state, and a voltage stabilizing circuit section 42 for stabilizing the voltage from the main power supply 41.
A DC / DC converter 43 for boosting the voltage stabilized by the voltage stabilization circuit 42, an oscillation circuit 44 for oscillating the voltage boosted by the DC / DC converter 43,
A standby power supply 46 for applying a voltage to the dimming element 2 in an emergency when the main power supply 41 fails, and a driver confirming that the main power supply 41 has failed and a voltage is applied to the dimming element 2 from the standby power supply 6. Warning LED as display means to inform the user
(Issue diode) 47 and anti-glare / non-glare switch 48 of main power supply 41. The backup power supply 46 is composed of a capacitor.

With the configuration of the electric circuit 4, the main power supply 41
When a failure occurs, a voltage can be temporarily applied to the light control element 2 from the standby power supply 46 immediately. At this time, since the voltage is also supplied from the standby power supply 46 to the warning LED 47, the warning LED 47 is turned on immediately when the main power supply 41 fails. The warning LED 47 is installed on the front side of the mirror cover 1 as shown in FIG. 4 so that a driver or the like can easily recognize that the main power supply 41 has failed. The anti-glare / non-glare switch 48 of the main power supply 41 is installed on the front side of the mirror cover 1 as shown in FIG.

The anti-glare mirror of the present embodiment having the above-described structure operates in the cell of the dimming element 2 by operating the anti-glare / non-glare switching switch 48 in a normal state when no failure occurs in the main power supply 41. The SPD liquid 25 as a particle-dispersion type light control material enclosed in is subjected to electrical control. That is, when the anti-glare / non-glare switch 48 is turned on and a voltage is applied to the light control element 2 from the main power supply 41, the particles made of the polarizing substance in the SPD liquid 25 become transparent glass substrates 22a and 22.
The anti-glare mirror functions as a normal mirror having a high reflectance because the light control element 2 is in a light-transmitting state by being oriented in a direction perpendicular to b and decoloring. Then, the anti-glare / non-glare switch 48 is turned off and the main power supply 41
If the voltage is not applied, the orientation of the particles in the SPD liquid 25 is disrupted and the particles are dispersed and colored at random, and the light control element 2 is in a semi-transmissive state. Demonstrate the anti-glare function.

When a failure occurs in the main power supply 41, a voltage is temporarily applied to the dimming element 2 from the backup power supply 46 immediately after the occurrence of the failure. As before, the non-glare state having a large reflectance can be maintained. Further, the voltage is also supplied from the standby power supply 46 to the warning LED 47 at the same time as the occurrence of the failure, so that the warning LED 47 is turned on.
Therefore, the driver or the like can immediately recognize that the main power supply 41 has failed. Then, the driver or the like recognizing the failure activates the discharging mechanism 3 while the voltage is applied to the light control element 2 from the standby power supply 46. That is, when the ejection mechanism switch 33 is pressed by a finger or the like against the urging force of the spring 34, the pads 32, 32 are removed from the through holes 26, 26 together with the flat plate 31 as shown in FIG. The SPD liquid 25 in the cell of the light control element 2 can be discharged to the outside through the through hole 26. As a result, even if the voltage application from the standby power supply 46 to the light control element 2 is stopped, the SPD liquid 25 is drained, and the light control element 2 composed of a transparent cell can ensure light transmission. Can ensure a non-glare state with a large reflectance.

Therefore, the anti-glare mirror is connected to the main power supply 4
Even if a failure occurs in the light-emitting device 1, it is necessary to prevent the light control element 2 from being in a semi-transparent state and being fixed to the anti-glare state immediately after the failure has occurred and to maintain the non-glare state. By operating the discharge mechanism 3 while the voltage is being applied by the standby power supply 46, the non-glare state can be maintained even after the application of the voltage from the standby power supply 46 is stopped.

It should be noted that the warning L
Depending on the ED 47, the failure of the main power supply 41 cannot be recognized,
Even if the voltage supply from the standby power supply 46 to the dimming element 2 is stopped without operating the discharge mechanism 3, the discharge mechanism 3 should be operated as soon as the driver or the like notices the failure of the main power supply 41. Thereby, the dimming element 2 fixed in the anti-glare state without applying the voltage can be returned to the non-glare state.

(Embodiment 2) The anti-glare mirror of this embodiment shown in FIGS. 5 and 6 is a dimming device with a mirror in which a particle-dispersed dimming material having fluidity is sealed in a transparent cell. As 2 ', a liquid crystal element is used instead of the SPD element. That is, the dimming element 2 ′ includes a pair of transparent glass substrates 22 a and 22 b disposed so as to face each other with the spacer 21 interposed therebetween, and the respective transparent glass substrates 22 a and 22 b
The transparent electrodes 23a and 23b made of ITO films respectively formed on the inner surfaces facing each other and the aluminum film 24 formed on the back surface of the transparent glass substrate 22b on the back side (the left side of FIGS. 5 and 6; the same applies hereinafter). , A pair of transparent glass substrates 22
a, a liquid crystal 27 as a particle-dispersed dimming material enclosed in a closed space formed by the spacers 21 and 22b.
And a polarizing film 28 as an optical film formed on the front surface of the transparent glass substrate 22a on the front side (the right side in FIGS. 5 and 6; the same applies hereinafter).

The cell gap is set to about 6 to 10 μm by the spacer 21. Further, in this embodiment, the transparent glass substrate 22b on the back side is bonded to the spacer 21 with a weak adhesive force. The liquid crystal 27
Is a guest-host liquid crystal. Due to the relationship between the liquid crystal 27 and the polarizing film 28, the dimming element 2 'enters a translucent state when a voltage is applied, and the anti-glare mirror functions as a normal mirror having a large reflectance, and is adjusted when no voltage is applied. Since the optical element 2 'is in a semi-transmissive state, the anti-glare mirror has a low reflectance and exhibits an anti-glare function.

Further, in the dimming device 2 using a liquid crystal element, since the cell gap is smaller than that using the SPD device, it is difficult to employ the same configuration as that of the first embodiment as the discharging mechanism. . Therefore, in the present embodiment, a flat plate 31 firmly fixed to the back surface of the aluminum film 24 of the transparent glass substrate 22b on the back side is used as the discharge mechanism 3 '.
Fixed to the lower end of the flat plate 31 and extended below the dimming element 2 ′, and its tip projects forward from the front side of the mirror case 1 (the right side in FIGS. 5 and 6; the same applies hereinafter). And a pair of springs 3 disposed on the rear side of the flat plate 31 to press and urge the flat plate 31 toward the front side.
4 and 34. The spring 34,
The transparent glass substrate 22b on the back side is pressed against the spacer 21 by the urging force of 34, whereby the sealing property in the cell of the light control element 2 'is ensured (the state of FIG. 5).

The electric circuit 4 for applying a voltage to the light control element 2 'is the same as in the first embodiment. The anti-glare mirror according to the present embodiment having the above-described configuration has an anti-glare / non-glare switch 48 in a normal state where no failure occurs in the main power supply 41.
By the operation described above, the liquid crystal 27 as the particle-dispersed dimming material sealed in the cell of the dimming element 2 'is electrically controlled. That is, when the anti-glare / non-glare switch 48 is turned on and a voltage is applied from the main power supply 41 to the dimming element 2 ′, the molecules of the liquid crystal 27 move in a direction perpendicular to the transparent glass substrates 22a and 22b. The anti-glare mirror functions as a normal mirror having a large reflectance because the light control element 2 ′ is in a light-transmitting state due to the orientation and the polarization film. Then, the anti-glare / non-glare switch 48 is turned off and the main power supply 41 is turned off.
If the voltage is not applied to the light control device 2 ′ from the above, the molecular orientation of the liquid crystal 27 changes from the direction parallel to the transparent glass substrates 22a and 22b to the direction perpendicular to the transparent glass substrates 22a and 22b. Since 2 ′ is in a semi-transmissive state, the anti-glare mirror has a low reflectance and exhibits an anti-glare function.

When a failure occurs in the main power supply 41, a voltage is temporarily applied to the dimming element 2 'from the backup power supply 46 immediately after the occurrence of the failure. As before, the non-glare state having a large reflectance can be maintained. Further, the voltage is also supplied from the standby power supply 46 to the warning LED 47 at the same time as the occurrence of the failure, so that the warning LED 47 is turned on.
Therefore, the driver or the like can immediately recognize that the main power supply 41 has failed. Then, the driver or the like who has recognized the failure activates the discharge mechanism 3 'while the voltage is applied to the light control element 2' from the standby power supply 46. That is, when the ejection mechanism switch 33 is pressed by a finger or the like against the urging force of the spring 34, as shown in FIG.
The transparent glass substrate 22b on the back side is
Therefore, the liquid crystal 27 in the cell of the light control element 2 'can flow out from the lower part of the opened light control element 2'. As a result, even if the voltage application from the standby power supply 46 to the light control element 2 ′ is stopped, the liquid crystal 27 is discharged and the light control element 2 ′ made of a transparent cell can secure the light transmission. The mirror can ensure a non-glare state with high reflectance.

Therefore, this anti-glare mirror is used in the first embodiment.
As in the case of the anti-glare mirror described above, even if a failure occurs in the main power supply 41, it is possible to prevent the dimming element 2 'from being in a semi-transparent state and fixed in the anti-glare state immediately after the failure occurs. In addition, the non-glare state can be maintained, and the discharge mechanism 3 ′ is operated during the voltage application by the standby power supply 46, so that the non-glare state is maintained even after the voltage application from the standby power supply 46 is stopped. Can be maintained.

[0042]

As described above in detail, in the anti-glare mirror of the present invention, even if the main power supply for applying a voltage to the dimming device fails, the dimming device is fixed in the anti-glare state. It is possible to avoid the inconvenience.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an electric circuit for applying a voltage to a dimming device according to an embodiment.

FIG. 2 is a cross-sectional view schematically illustrating a configuration of an anti-glare mirror according to the first embodiment.

FIG. 3 is a cross-sectional view of the anti-glare mirror according to the first embodiment, showing a state in which a discharge mechanism is operated.

FIG. 4 is a plan view of the anti-glare mirror according to the first embodiment.

FIG. 5 is a cross-sectional view schematically illustrating a configuration of an anti-glare mirror according to a second embodiment.

FIG. 6 is a cross-sectional view showing a state in which a discharge mechanism is operated in the anti-glare mirror according to the second embodiment.

[Explanation of symbols]

2, 2 ': light control element, 3, 3': discharge mechanism, 25: SPD liquid as a particle-dispersed light control material having fluidity, 27
.. Liquid crystal as a particle-dispersed light modulating material having fluidity, 4
1 ... Main power supply, 46 ... Capacitor as backup power supply, 47
... warning LED as display means, 48 ... anti-glare / non-glare selector switch

Claims (3)

[Claims] 1. An anti-glare mirror comprising a dimming element which is in a translucent state when a voltage is applied from a main power supply and has a translucent state in which the translucency is reduced when a voltage is not applied, wherein An anti-glare mirror, comprising: a standby power source separately applying a voltage to the dimming element, separately from the power source. 2. A light modulating element in which a particle-dispersed light modulating material having fluidity is sealed in a transparent cell, wherein the light modulating element is electrically controlled. Thereby, in the anti-glare mirror, which is in a translucent state when a voltage is applied, and has a translucent state in which the transmissivity is reduced when a voltage is not applied, the cell is opened and the particle-dispersion type tone is adjusted from the cell. An anti-glare mirror comprising a discharge mechanism for discharging an optical material. 3. A light modulating element in which a particle-dispersed light modulating material having fluidity is sealed in a transparent cell, wherein the light modulating element comprises an electric power supply from a main power supply. When the main power supply stops operating in an anti-glare mirror that is in a translucent state when a voltage is applied and becomes translucent when a voltage is not applied and becomes translucent when no voltage is applied, An anti-glare mirror, comprising: a preliminary power supply for preliminarily applying a voltage to the light control element; and a discharge mechanism for opening the cell and discharging the particle-dispersed light control material from the cell.