JP2002036876A - Antiglare device against headlamp light from another vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relieve a driver of the glare caused by headlamp light from an oncoming vehicle and to lower possibility of an accident. SOLUTION: A polarizing plate 3 is arranged so as to cover a headlight 2 and a fog lamp serving as headlamps of a vehicle. The polarizing plate 3 allows transmission of light oscillating in one direction only. In a part or the whole of a windshield 5 covering a driver seat, a polarizing plate 6 allowing transmission of light oscillating in the direction crossing the polarizing plate 3 covering the headlamps is arranged. Alternatively, a polarizing plate 11 is also arranged in a rearview mirror 9. In this way, light from the headlamps 2, 4 is limited to polarized light 7 oscillating in one direction, and this light cannot pass through the polarizing plate 5, which allows only the light transmission in the direction crossing the polarized light 7, in the windshield 5. Consequently, light of the headlamps 2, 4 is prevented from reaching the eyes of the driver, and the driver does not feel the glare.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-glare device for reducing glare caused by a headlight of an automobile running oppositely, and is particularly widely used as a traffic system for preventing accidents. The present invention relates to an anti-glare device for a headlight of another vehicle, which exhibits a greater effect.

[0002]

2. Description of the Related Art At night or when traveling in a tunnel, it is necessary for a traveling vehicle to drive with a headlight or the like turned on to illuminate a dark road surface. The headlight of this car illuminates the front of a car traveling at a speed of about 100 kilometers at an hourly speed,
It is required that the light reach a great distance and be very bright.

[0003]

As described above, a headlight is required to have a considerable brightness as a light source.
The resulting glare is when the light of the illumination enters the eyes of the driver of the oncoming vehicle. Since vehicles traveling on the road illuminate the front of each other with headlights, the light of the headlights of oncoming vehicles passing each other may enter the driver's eyes. Even if the bright light enters the eye for a moment, the glare temporarily opens the pupil, making it impossible to recognize the surrounding darkness, and forced to drive near blindness until the pupil narrows again. There is a danger that

[0004] In order to reduce the glare of the headlights of oncoming vehicles, vehicle headlights are provided with means for reducing the irradiation angle of the light. When there is an oncoming vehicle or when traveling in a crowded city, the irradiation angle of the headlight is slightly lowered so that the driver's seat of the oncoming vehicle is not illuminated. However, if the driver runs with the irradiation angle of the headlight raised without considering the oncoming vehicle, no effect can be obtained. It is useless if the moral of the driver of the oncoming vehicle is low. In addition, on undulating roads, the lighting angle of the headlights also goes up and down due to the angle of the vehicle going up and down due to the ups and downs of the oncoming vehicle. It can also irradiate your eyes. Fog lamps and the like other than the headlights are rarely provided with the function of raising and lowering the irradiation angle. Even if the angle of the headlight is lowered, the glare of the fog lamps is not released.

[0005] To prevent the light of the headlight of the oncoming vehicle from entering the eyes,
It is conceivable to use a windshield that covers the front of the driver's seat with a thin dark black color, such as sunglasses, through which light hardly passes. Although the light of the headlight of the oncoming vehicle reaching the driver is weakened in this way, however, there is a problem that it is difficult to visually recognize pedestrians and road signs passing through the road. In other words, it is necessary that only the brightness of the headlight of the oncoming vehicle reaching the driver can be reduced, and the pedestrian and the like can be visually observed by the driver without change.

A driver may feel glare not only from an oncoming vehicle but also from, for example, the glare of a headlight of a vehicle traveling behind and following the own vehicle. The car is equipped with a reflector called a rearview mirror or a rearview mirror to check the rear. The light of the headlight of the car traveling behind reflects on the driver's eyes. Then, a situation similar to that described above is caused. The rear-view mirror is designed to change the angle to reduce the light behind, but it is useless if you forget to change the angle. Further, the rearview mirror is not provided with such a contrivance and cannot reduce glare from reflected light.

[0007]

According to the present invention, a deflecting plate which transmits polarized light whose vibration direction is limited to only one direction is disposed as a light-transmitting material for covering a headlight of an automobile. In addition to disposing a polarizing plate that transmits polarized light whose polarization direction crosses the polarized light transmitted by the polarizing plate that covers the headlight, on part or all of the front glass that covers the front of The object is achieved by providing an anti-glare device for a vehicle headlight.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An antiglare device for a headlight of another vehicle according to the present invention uses only light whose vibration direction is limited to only one direction while irradiating light from the headlight. In order to prevent the light from reaching the seats, polarizing plates are arranged on both sides. The polarizing plate is a thin plate-shaped polarizer, and is also called a polarizing filter. A polarizer is an optical element that converts natural light, illumination light, and the like into linearly polarized light. Natural light and illumination light include waves oscillating in all directions perpendicular to the traveling direction. When the natural light or the illumination light passes through the polarizing plate, the vibration direction is limited to only the light limited to one direction. This is called linearly polarized light. Examples of the polarizing plate include a polarizing plate using polar dichroism such as Polaroid (registered trademark) and a polarizing plate using light interference by a multilayer film.

The above-mentioned polarizing plate is arranged so as to cover the headlight of the vehicle, and is arranged on a part or all of the windshield covering the front of the driver's seat. To distribute
For example, a polarizing plate may be used as it is as a material of a transmission cover for covering a headlight as a headlight, or a polarizing plate in the form of a synthetic resin film may be adhered on the cover. Also in the case of a windshield, a polarizing plate in the form of a synthetic resin film may be adhered to a part or the whole surface of the windshield. It is possible to use a polarizing plate for the windshield itself. Alternatively, it is also possible to sandwich a film-shaped polarizing plate between the glasses in a sandwich state. Here, the headlight is a light for illuminating the front of the traveling direction of the car, and is not limited to a headlamp.
It also refers to auxiliary headlights such as fog lamps, and it is also conceivable to implement all of these headlights. It is unsuitable to polarize the light of a vehicle width light or a direction signal light for allowing others to recognize the position of the vehicle, which is not a light for illuminating the front.

[0010] The vibration directions of the light transmitted by the polarizing plate covering the headlight and the polarizing plate disposed on the windshield must cross each other. As described above, the polarizing plate transmits only light whose vibration direction is limited to only one direction. For example, if the polarizing plate covering the headlight is arranged so as to transmit only light that oscillates in the vertical direction, the polarizing plate arranged on the windshield is only the light that oscillates in the direction that intersects this, preferably 90 degrees. Is arranged to transmit light. Thus, the light emitted from the headlight is irradiated with polarized light that vibrates in the vertical direction by the polarizing plate. However, if the windshield of the oncoming vehicle is provided with a polarizing plate that transmits only light that vibrates in the horizontal direction, the light of the headlight will not pass through the windshield, and the driver's eyes will see the polarization of the headlight. Will not reach. The light that is transmitted through the windshield is the light from the headlights of ordinary cars that do not use polarizing plates, or pedestrians, etc., illuminated by the headlights of the own vehicle. The light from the lamp
The light is reduced to about 0% or 10%. The polarizing plates disposed on the headlight and the windshield may be in any direction as long as they cross each other, and are not limited to the vertical and horizontal directions, and may be disposed, for example, at an angle of 45 degrees from the vertical.

[0011] The polarizing plate may be arranged not only on the headlight but also on the surface of a rear-viewing reflecting mirror such as a room mirror or a rearview mirror. The polarizing plate disposed on the surface of the reflecting mirror is mounted so as to transmit polarized light in a direction crossing the polarized light transmitted by the polarizing plate mounted on the headlight as described above. The polarizing plate of the reflecting mirror does not transmit the polarized light from the headlight, but transmits light in other directions of vibration, which reflects off the mirror and is sensed by the driver's vision. In other words, only the polarized light from the headlight of another vehicle does not enter the driver's eyes, and the driver does not feel glare, and can confirm other pedestrians, direction indication signals, and the like.

As described above, the present invention is to relieve the driver from the glare of the headlights of other vehicles, and a sufficient effect can be obtained if the present invention is applied to only one vehicle. Not something. One car maker implements all of its products regardless of the model. Or, more than that, all manufacturers can exert a great effect by implementing the present invention all at once. That is, by implementing the present invention for as many vehicles as possible, the driver is released from the glare of the headlights of a larger number of vehicles.
As an effect, the same function as in the past can be achieved by illuminating the road etc. with the headlight of the car you drive, but the polarization of the headlight of other vehicles is controlled by the polarizing plate arranged on the windshield. It is possible to obtain something that is blocked and does not reach the driver's eyes, and does not feel glare. However, this is a great effect that there is no problem in visually recognizing road signs and pedestrians.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. In the figure, reference numeral 1 denotes a passenger car embodying the present invention, and a polarizing plate 3 is attached to a surface of a synthetic resin cover which covers a headlight 2 which is a headlight attached to a front portion thereof. Reference numeral 4 denotes a headlight, which is illumination generally called a fog lamp. The polarizing plate 3 is attached to the surface of the synthetic resin cover of the fog lamp 4. The polarizing plate 3 attached so as to cover the headlight 2 and the fog lamp 4 is a polarizing plate 3 that transmits only polarized light that vibrates in the vertical direction.

A polarizing plate 6 is attached to almost the entire surface of the front glass 5 covering the front of the driver's seat. The polarizing plate 6 transmits only light that vibrates in the horizontal direction. When traveling by such a car, the windshield 5 transmits only polarized light that oscillates in the horizontal direction, but in reality, it blocks transmission of polarized light that intersects 90 degrees with the windshield, that is, light that oscillates vertically. It does not hinder the transmission of light in other vibration directions. As mentioned above, natural light is a mixture of light that oscillates in various directions, but most of the light can pass through the windshield, so there is no way to check the surroundings when driving in the daytime. There is no problem. When traveling with the headlights 2 and 4 turned on at night or in a tunnel, the polarizing plate 3 is provided so that the oncoming vehicle covers the headlights as described above.
, The light of illumination is polarized light 7 oscillating in the vertical direction.
Only irradiates. This vertically oscillating polarized light 7
Is prevented from being transmitted by the polarizing plate 6 disposed on the windshield 5 of the own vehicle, the light of the headlights 2.4 of the oncoming vehicle does not enter the eyes at all, and the driver does not feel glare. Light that bounces off a road sign or a pedestrian is light that vibrates in various directions and can be visually recognized as usual.

The headlights according to the present invention are not limited to the headlights 2 and fog lamps 4 described above.
RV refers to all lighting that illuminates the front of the car.
It is also possible to arrange a polarizing plate on an auxiliary lamp mounted on the roof of a car. In addition, by installing a polarizing plate not only on the windshield of the car but also on the omnidirectional glass surface of the car, the driver can be freed from the glare of the headlights of the car not only in front but also on the left and right and behind. Can be.

FIG. 4 shows an example in which the invention is applied to a room mirror 9 disposed in a vehicle. Mirror 1 of room mirror 9
The polarizing plate 11 is disposed on the zero surface. As described above, the polarizing plate 11 transmits only polarized light that vibrates only in the horizontal direction. When the polarized light 7 from the headlight of the car traveling behind reaches the rearview mirror 9, the polarizing plate 11 of the rearview mirror 9 is used.
Does not transmit polarized light 7 from a vertically oscillating headlamp. As a result, the polarized light 7 from the headlight is not reflected by the mirror 10,
Not in the eyes of the driver. Other natural light 8 is polarizing plate 1
1 is reflected by the mirror 10 and is visually recognized by the driver.

[0017]

The present invention has the above-described configuration, and can obtain the following effects. Light from the headlamp is limited to only light that oscillates in only one direction by passing through the polarizing plate, and light from the headlamp enters by the polarizing plate on the windshield that transmits only light that oscillates in the direction that intersects it. Is hindered. This relieves the driver of the glare of the oncoming headlights, does not cause blindness, and greatly helps prevent accidents. A polarizing plate placed on the windshield prevents transmission of only light that oscillates in a direction that intersects with the polarized light transmitted by almost 90 degrees, and light that oscillates in other directions reaches the driver's eyes almost as it is. It does not interfere with confirmation of pedestrians and pedestrians. Since a direction indicating signal other than the headlight is not covered with the polarizing plate, light vibrating in various directions of the signal can be visually recognized by a driver of another vehicle as it is. Even if the oncoming vehicle raises the irradiation angle of the headlight, the polarizing plate on the windshield prevents it from entering the driver's eyes, so there is no need to rely on the driver's morals and operation, the glare of the headlight Released from. Further, when the present invention is applied not only to the headlamp but also to all headlights, the driver is more reliably released from glare. By arranging a polarizing plate on a rear-viewing reflecting mirror such as a rearview mirror, the reflecting mirror does not reflect polarized light from a headlight of a car traveling behind, and the driver can be free from the glare felt by them. The invention of the present application does not exert its effect by being implemented by one vehicle, but adopts to more types of vehicles and cars of manufacturers, that is, exerts a great effect by being adopted as a single transportation system It is.

[Brief description of the drawings]

FIG. 1 is a perspective view of an automobile embodying the present invention.

FIG. 2 is a side view of the oncoming vehicle passing by;

FIG. 3 is a side view of a state where transmission of polarized light from a headlight is prevented by a polarizing plate disposed on a windshield.

FIG. 4 is a perspective view implemented on a room mirror.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Passenger car 2 Headlight 3 Polarizer 4 Fog lamp 5 Windshield 6 Polarizer 7 Polarized light 8 Natural light 9 Room mirror 10 Reflector 11 Polarizer

Claims (3)

[Claims] 1. A polarizing plate which transmits polarized light whose vibration direction is limited to only one direction is disposed as a light transmitting material for covering a headlight mounted on a front portion of a vehicle body, and is disposed in front of a driver's seat of the vehicle. An anti-glare device for a headlight of another vehicle, in which a part or all of a windshield that covers the headlight is provided with a polarizing plate that transmits polarized light whose vibration direction intersects with polarized light transmitted by a polarizing plate that covers the headlight. . 2. Headlights include not only headlamps,
2. The anti-glare device for a headlight of another vehicle according to claim 1, further comprising all lights for illuminating the front of the traveling direction such as a fog lamp. 3. A polarizing plate, which transmits polarized light whose vibration direction is limited to only one direction, is disposed as a light-transmitting material covering a headlight mounted on a front portion of a vehicle body, and is used for confirming the rear of the vehicle. An anti-glare device for a headlight of another vehicle, wherein a polarizing plate that transmits polarized light whose vibration direction intersects with polarized light transmitted by the polarizing plate that covers the headlight is attached to the surface of the rear-viewing reflector.