CN1576102B - Night viewing device for vehicle - Google Patents

Abstract

Night vision devices for vehicles. The night vision device for vehicles of the present invention can promote safe operation. The night vision device comprises: a high-beam bulb (11) for illuminating visible light and infrared rays, a low-beam bulb (12) for illuminating visible light, and a head-up display (30) for displaying images captured by a night vision camera (20) , the optical filter (13) that blocks visible light, and this optical filter can be switched and moved to the first position covering the high beam bulb (11) and the second position away from the high beam bulb (11); when night vision When the device start switch (51) was turned on, the two light bulbs (11, 12) were lit, and the filter (13) moved to the first position, and the head-up display (30) moved to display the above-mentioned image; 13) When it is in the second position and the low beam bulb (12) is turned off, even if the night vision device start switch (51) is turned on, the filter (13) is prohibited from moving from the second position to the first position .

Description

Night Vision Devices for Vehicles

technical field

The invention relates to a night vision device for vehicles.

Background technique

In the past, when the vehicle was driving at night, the driver could not see clearly the dark place in front of the vehicle, which became the cause of traffic accidents. Therefore, in recent years, the following night vision devices for vehicles have been proposed that assist the vision of nighttime drivers and ensure safe driving.

That is, the night vision device has an infrared spotlight and an infrared camera, and by using the camera to sensitize the infrared light reflected by the object in front of the vehicle among the infrared rays irradiated from the spotlight to the front of the vehicle, an image of the front of the vehicle is taken, and displayed on the display device. display the image on .

For this night vision device, Patent Document 1 proposes to adopt a spotlight that not only emits visible light but also emits light containing infrared wavelength components on a running spotlight (so-called high-beam lamp) that illuminates a distant place on the front side of the vehicle, By using the spotlight for traveling as an infrared spotlight, it is unnecessary to install a night vision device with a dedicated infrared spotlight.

In the night vision device described in Patent Document 1, an optical filter that blocks visible light and transmits infrared rays is arranged. 2nd position with spotlight. In addition, when the start switch located in the vehicle compartment is turned on, the night vision device starts, and the spotlights for passing vehicles (so-called low beam lights) and the spotlights for driving are turned on, and the filter is moved to the first position. In the state of the position, the above-mentioned image is displayed on the display device.

[Patent Document 1]

Japanese Patent Application Publication No. 2000-205949

Here, the night vision device is a device that assists the driver's vision at night to ensure safe operation. In other words, when the night vision device is used for night driving, it must be illuminated with visible light.

However, in the night vision device described in the above-mentioned patent document 1, because the night vision device is started simply by turning on the start switch, the light filter moves to the first position, so that the Therefore, when the start switch is turned on while the passing spotlights are turned off, not only the passing spotlights but also the driving spotlights will not emit visible light. Therefore, it becomes a nighttime driving using a night vision device in a state where there is no visible light illumination, which hinders the guarantee of safe operation.

In addition, when the night vision device is started simply by turning on the starter switch as described above, if the starter switch is turned on when the running spotlight is turned on, the The visual light is blocked, so the driver is driven at night in an undesired lighting state, which hinders the guarantee of safe operation.

Also, although it is not specifically described in the above-mentioned Patent Document 1, when the night vision device is stopped by turning off the starter switch, if the filter is simply moved to the second position and used for driving When the spotlight is turned off, before the spotlight for driving is turned off, the filter moves away from the first position and emits visible light from the spotlight for driving, so that the driver may drive at night in an undesired lighting state, hindering safe operation .

Contents of the invention

The present invention has been made in view of the above problems, and an object of the present invention is to securely utilize a night vision device for a vehicle to ensure safe operation.

In order to achieve the above object, the vehicle night vision device described in technical solution 1 includes: a spotlight for driving that irradiates visible light and infrared rays to the front side of the vehicle at a distance, and a spotlight for passing a vehicle that irradiates visible light near the front side of the vehicle. A night vision camera that is sensitive to infrared light reflected by objects in front of the vehicle and captures images in front of the vehicle. A display device that displays images captured by the night vision camera blocks visible light and transmits infrared rays. filter, and a moving mechanism that switches and moves the filter to the first position covering the spotlight for driving and the second position for leaving the spotlight for driving; The two spotlights are turned on, and the filter moves to the first position, and the display device operates to display the above-mentioned image;

The night vision device for a vehicle is characterized in that when the filter is located at the first position and the running spotlight is turned on, when the start operation mechanism is turned off, the filter light is turned off after the running spotlight is turned off. to move to the 2nd position.

In this way, when the start operating mechanism is turned off to stop using the night vision device, it is possible to avoid the visible light from the running spotlight from being emitted by the filter from the first position before the running spotlight is turned off. Make use of night vision devices for vehicles to ensure safe operation.

Here, if the filter is moved out from the first position immediately after the running spotlight is turned off, the running spotlight emits residual light. In contrast, the vehicle night vision device according to claim 2 is characterized in that, when the above-mentioned off operation is performed, after a predetermined time or more has elapsed since the running spotlight is turned off, the filter is turned to the second position. movement, thus, as described above, can avoid emitting residual light.

The vehicle night vision device according to claim 3 is characterized in that when the high beam operating mechanism provided in the vehicle interior is turned on, the running spotlight is turned on, and when the filter is in the first position and the running spotlight When the high beam operating mechanism is turned on while the lights are on, the running spotlights are kept on and the filter is moved to the second position.

In this way, in the process of starting the night vision device in the state where the filter is located at the first position and the driving spotlights are on, if the flight attendant intends to request visible light illumination with the driving spotlights, the lighting can be adapted to this requirement. .

The night vision device for vehicles according to claim 4 is characterized in that the moving mechanism is composed of metal parts provided on the optical filter and a solenoid provided on the vehicle, and the movement mechanism generated by passing current through the solenoid is used. Electromagnetic force, the metal parts are attracted by the solenoid, and the filter moves between the first position and the second position.

In this way, switching the filter to the first position and the second position can be realized easily. In addition, the time for the filter to move from the second position to the first position may be very short (for example, 0.1 second or less).

The night vision device for vehicles according to claim 5 is characterized in that when the metal component is attracted by the solenoid, the filter moves to the first position, and a detection mechanism is provided to detect that the filter has moved to the first position. When the current is passed to the solenoid for a predetermined time or more, and the movement to the first position is not detected by the detection means, the energization to the solenoid is stopped.

Here, when the optical filter is fixed and cannot move, or when the solenoid fails, etc., even if a current is passed through the solenoid, the filter does not operate normally. If the current continues to flow through the solenoid, the solenoid will generate abnormal heat and smoke.

On the other hand, in the night vision device for a vehicle according to claim 5, since the movement of the optical filter to the first position is not detected even if the current is passed through the solenoid for a predetermined time or longer, the movement to the first position is stopped. The solenoid is energized, so the above-mentioned danger of abnormal heating and smoking can be avoided.

However, if the solenoid deteriorates and the electromagnetic force generated by energization becomes weak, the suction force to hold the filter at the first position will be insufficient. , but just after moving, the filter deviates to a position away from the first position, and moves to the first position again within a specified time due to the attractive force of the solenoid. That is, there is a danger that the optical filter repeatedly reciprocates between the first position and a position deviated from it, and when reciprocating at a time interval shorter than a predetermined time, the stop of power supply described in claim 7 doesn't work.

Then, the vehicle night vision device according to claim 6 is characterized in that, in the process of energizing the solenoid, the operation of moving the filter from the first position to the first position again is repeated for a predetermined number of times or more. , stop energizing the solenoid.

In this way, it is possible to prevent the filter from repeatedly performing the above-mentioned reciprocating movement due to deterioration of the solenoid.

Description of drawings

FIG. 1 is a cross-sectional view schematically showing a state in which a night vision device for a vehicle according to an embodiment of the present invention is mounted on a vehicle.

FIG. 2 is a front view of the vehicle headlight device 10 according to the embodiment of the present invention viewed from the vehicle front side.

FIG. 3 is a cross-sectional view schematically showing a detailed structure of the headlight device 10 of FIG. 2 .

Fig. 4 is a block diagram illustrating operation control of the night vision device shown in Figs. 1 to 3 .

Detailed ways

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 is a cross-sectional view schematically showing a state in which a night vision device for a vehicle according to this embodiment is mounted on a vehicle, FIG. Fig. 4 is a block diagram illustrating the operation control of the night vision device. 2 shows a headlight device 10 arranged on the left side of the vehicle, and a similar headlight device 10 is also arranged on the right side of the vehicle.

As shown in FIGS. 1 to 4 , the night vision device for a vehicle according to this embodiment includes a headlight device 10 , a night vision camera 20 , a head-up display 30 as a display device, and an electronic control unit (ECU) 40 as a control mechanism.

The headlight device 10 is mounted on the front portion of the vehicle, and is a four-lamp type including a high-beam bulb 11 as a running spotlight and a low-beam bulb 12 as a passing spotlight. The high-beam bulb 11 is a bulb that irradiates illumination light toward the far side in front of the vehicle, and the low-beam bulb 12 is a bulb that irradiates illumination light near the front side of the vehicle.

By the way, Japanese regulations stipulate that, except when there are oncoming vehicles and vehicles running ahead, the high beam bulb 11 must be turned on for driving to prevent drivers of oncoming vehicles and vehicles driving ahead from being dazzled. In addition, the low beam bulb 12 is set so that the light distribution and illuminance of the obstacle ahead about 40 m or more can be confirmed, and the high beam bulb 11 is set so that the light distribution and illuminance of the obstacle ahead about 100 m or more can be checked. In addition, in the present embodiment, it is designed that the low beam bulb 12 must always be turned on when the high beam bulb 11 is turned on.

Illumination light from both bulbs 11 and 12 mainly contains wavelength components in the visible light region, and at least the illumination light from the high beam bulb 11 contains infrared wavelength components in addition to wavelength components in the visible light region. The high-beam bulb 11 of the present embodiment employs a bulb 11 containing a wavelength component of near-infrared rays among infrared rays. A specific example of such a high beam bulb 11 is a well-known halogen lamp.

In addition, the headlight device 10 has a filter 13 that blocks visible light and transmits near-infrared rays. 2nd position. The movement structure will be described in detail later.

The night vision camera 20 is supported near the upper edge of the front windshield 1 in the vehicle interior, and is a device for photographing the front of the vehicle through the front windshield 1. It is sensitive to the infrared light reflected by objects and shoots the image in front of the vehicle. The night vision camera 20 of the present embodiment is composed of a telescopic lens, an imaging mechanism, a video signal generating mechanism, and the like, which are not shown.

Specifically, the imaging mechanism is a charge-coupled device (CCD device) that converts an image in front of the vehicle into an electrical signal. The video signal generator is a microcomputer that generates video signals to which vertical synchronization signals, horizontal synchronization signals, color burst signals, etc. are added based on electrical signals converted by the CCD element. In addition, the video signal of this embodiment is formed according to the well-known NTSC system.

The head-up display 30 is arranged on the instrument panel 2 extending from the lower edge of the front windshield 1 to the inside of the vehicle interior, and it includes a TFT liquid crystal panel 31 and a backlight 32 as a display portion. The liquid crystal panel 31 is shown in FIG. 1 As shown, the liquid crystal panel 31 is supported horizontally in the opening 2b of the upper wall 2a of the instrument panel 2, and the liquid crystal panel 31 receives light from a backlight 32 to display a display image on a display screen 31a.

The display light of the displayed image enters the front windshield glass 1, passes through the front windshield glass 1, and reflects to the eyes of the driver M sitting on the driver's seat along the dotted line R shown in FIG. The front image of 1 is a virtual image m.

Also, a backlight 32 is supported on the back side of the liquid crystal panel 31 , and when the backlight 32 is turned on, light enters the liquid crystal panel 31 from the back side. By driving the liquid crystal panel 31 with a matrix drive circuit not shown, the image ahead of the vehicle captured by the above-mentioned night vision camera 20 is emitted as display light. In this way, since the image ahead of the vehicle at night becomes the virtual image m and can be recognized by the driver, it is possible to assist the driver's vision at night and ensure safe driving.

The ECU 40 is an electronic control unit that controls the entire night vision device, and performs movement control of the optical filter 13, action control of the night vision camera 20, and action control of the head-up display 30.

Next, the configuration of the headlight device 10 will be described in detail with reference to FIG. 3 . In addition, arrows indicating the up-down, front-back directions in FIG. 3 indicate the up-down, front-back aspects of the vehicle in a state in which the headlight device 10 is mounted on the vehicle.

The headlight unit 10 is constructed such that it has two bulbs 11, 12 and a filter 13 in a housing formed by combining a reflector 14 and a cover 15 on the back of the two bulbs 11, 12. The reflector 14 in this embodiment is made of metal, and has a function of reflecting light emitted from the bulbs 11 and 12 toward the vehicle front side. In addition, the cover 15 of this embodiment is made of glass and functions as a lens.

The filter 13 is disposed on the vehicle front side of the high beam bulb 11 inside the housings 14 and 15 , and has a cylindrical shape extending in the vehicle front-rear direction. The optical filter 13 of the present embodiment is formed in a cylindrical shape with both ends opened.

An arm 16a extending outward from the cases 14 and 15 is coupled to the optical filter 13, and a support (moving mechanism) 16b that is a metal member is coupled to the arm 16a. A link mechanism is constituted by the arm 16a and the strut 16b.

In addition, when a current flows through the solenoid (moving mechanism) 17 disposed opposite to the support 16b, due to the electromagnetic force generated on the solenoid 17, the support 16b is attracted by the solenoid 17, and the link mechanism action. Therefore, the filter 13 moves toward the rear of the vehicle to the first position covering the high beam bulb 11 .

Here, the link mechanism is provided with elastic members 16c such as springs. When the filter 13 moves to the first position, the elastic member 16c is elastically deformed. When the energization to the solenoid 17 is stopped, the link mechanism operates due to the elastic force of the elastic member 16c. Therefore, the filter 13 moves forward of the vehicle to a second position away from the high beam bulb 11 .

The position of the filter 13 indicated by the solid line in FIG. 3 indicates the second position, and the high beam bulb 11 is located outside the cylindrical filter 13 . In addition, the position of the filter 13 indicated by the dotted line in FIG. 3 represents the first position, and the high beam bulb 11 is located inside the cylindrical filter 13 .

In addition, reference numeral 18 in FIG. 3 denotes a detection mechanism for detecting that the optical filter 13 has moved to the first position. The detection mechanism 18 of this embodiment adopts a contact type self-recovery push switch. When the optical filter 13 moves to the first position, the first position detection switch 18 is pressed by the support 16b to become an on state, and the first 1. The position detection switch 18 outputs an ON signal S1 to the ECU 40. In addition, when the filter 13 moves to the second position, the support 16 b is separated from the first position detection switch 18 . Then, the first position detection switch 18 is turned off by self-recovery, and the output of the on signal S1 is stopped.

Here, when the current flowing through the solenoid 17 moves the filter 13, it must have an attractive force against the elastic force of the elastic member 16c, so a large current is required. On the other hand, when the optical filter 13 is held at the first position, it can be held with a small current. Therefore, when energizing the solenoid 17, if the first position detection switch 18 does not output the ON signal S1, the energization control is performed so that a large current flows, and when the ON signal S1 is output, the energization control is performed so that A small current flows.

In addition, a cover 19 covering the filter 13 from the front side of the vehicle is arranged in the cases 14 and 15, and the cover 19 prevents the filter 13 from being seen from the outside of the vehicle and spoiling the appearance of the vehicle. Light emitted from the bulbs 11 and 12 and incident on the globe 19 is reflected by the globe 19 , reflected by the reflector 14 , transmitted through the case 15 , and emitted toward the front of the vehicle as illumination light.

Next, the operation control of the night vision device will be described with reference to FIG. 4 .

A night vision device start switch (start operation mechanism) 51 for operating the start or stop of the night vision device and a high beam switch (high beam operation mechanism) 52 for operating the high beam bulb 11 to turn on or off are provided in the vehicle compartment. Two switches 51,52 are arranged on the position that driver's hand can reach, and high beam switch 52 is with well-known columnar switch, and the light that operates low beam bulb 12, the switch that lights out is integrally formed. In addition, signals S2, S3 from the two switches 51, 52 are input to the ECU 40.

The night vision device start switch 51 is turned on, and the operation signal S2 is turned on to input the ECU 40. If the conditions for prohibiting the start described later are not satisfied, the ECU 40 controls the actions of various devices to start the night vision device. Specifically, the lighting signal S4 is output to both bulbs 11 and 12, and both bulbs 11 and 12 are turned on. Then, the energization signal S5 is output to the solenoid 17, and a current flows through the solenoid 17, thereby moving the optical filter 13 to the first position. In addition, the night vision camera 20 is activated. The head-up display 30 is activated.

When the night vision device is started in this way, the near infrared rays reflected by the object in front of the vehicle among the near infrared rays from the high beam bulb 11 are photographed by the night vision camera 20, and the night vision camera 20 uses NTSC to capture the image. way of video signal output. Then, the liquid crystal panel 31 is driven based on the video signal, and the display light emitted from the display screen 31 a is emitted from the backlight 32 . Then, the captured image ahead of the vehicle becomes a virtual image m and is recognized by the driver.

Therefore, by using the visible light emitted from the low beam bulb 12 to illuminate the vicinity of the front side of the vehicle and display the image ahead of the vehicle at night, it is possible to assist the driver's night vision and ensure safe operation. Moreover, although the high beam bulb 11 is turned on, since the visible light from the high beam bulb 11 is blocked by the filter 13, it is possible to display the vehicle front at night without dazzling the driver of the oncoming vehicle and the preceding vehicle. image.

However, when the optical filter 13 is located at the second position and satisfies at least one of the following three start prohibition conditions, even when the night vision device start switch 51 is turned on, the ECU 40 also prohibits the filter. The device 13 moves to the first position. That is, it is a condition that the low beam bulb 12 is turned off, a condition that the high beam bulb 11 is turned on, and a condition that the illuminance sensor does not detect that it is nighttime.

Specifically, when the ON signal S1 of the first position detection switch 18 is not input to the ECU 40, only when the low beam bulb 12 is turned on and the high beam bulb 11 is turned off, the ECU 40 activates the night vision device. The input of the ON operation signal S2 of the switch 51 activates the night vision device.

According to the above, since the light filter 13 will not move to the first position as long as the low-beam bulb 12 is not turned on, it is prohibited to use it in the state where there is no visible light from the two bulbs 11 and 12. The night driving of the visual device can ensure safe operation. In addition, as long as the high beam bulb 11 is not turned off, the filter 13 will not move to the first position, so it is possible to avoid blocking the visible light from the high beam bulb 11 contrary to the driver's intention, and the vehicle can be reliably utilized. Ensure safe operation with night vision devices.

In addition, in the present embodiment, only when the vehicle speed is 30 km/n or more, and the conditions of outputting the energization signal S5 to the solenoid 17 and outputting the on-signal S1 from the first position detection switch 18 are satisfied, The output of the lighting signal S4 to the high beam bulb 11 is permitted.

During the start-up of the night vision device, if the high beam switch 52 is turned on, the ECU 40 controls such that the high beam bulb 11 is kept on and the light filter 13 is moved to the second position. Even when the night vision device is activated, it can be in a lighting state corresponding to the operation of the high beam switch 52 . In addition, the high beam switch 52 is the same even if it is a general-purpose switch.

Specifically, when the ON signal S1 from the first position detection switch 18 is input to the ECU 40, and the lighting signal S4 is output from the ECU 40 to the high beam bulb 11, the lighting signal S3 from the high beam switch 52 is input to the ECU. In the case of 40, the output of the lighting signal S4 to the high beam bulb 11 is maintained, and the output of the energization signal S5 to the solenoid 17 is stopped.

In addition, when the high beam switch 52 is switched from on to off, if at least one of the activation prohibition conditions described above is not satisfied, the energization signal S5 is output to the solenoid 17 to move the filter 13 to the first position. Incidentally, when the high beam switch 52 is a switch for passing, the energization signal S5 is output after a predetermined time (for example, about 1 second) has elapsed. Therefore, even when passing is performed continuously in a short time, it is possible to prevent the lifetime of the solenoid 17 from being shortened by intermittently outputting the energization signal S5 in a short time.

When the light filter 13 is in the first position and the high beam bulb 11 is turned on, and the night vision device start switch 51 is turned off, the light filter 13 is turned to the second position after the high beam bulb 11 is turned off. move.

Specifically, when the ON signal from the first position detection switch 18 is input to the ECU 40, and when the lighting signal is output from the ECU 40 to the high beam bulb 11, the OFF signal S2 from the night vision device start switch 51 is input to the ECU 40. In the case of , the ECU 40 turns off the high beam bulb 11, and then stops energizing the solenoid 17 after a predetermined time (for example, 2.5 seconds).

Therefore, when the night vision device start switch 51 is turned off and the night vision device is stopped, before the high beam bulb 11 is turned off and the residual light is emitted, the optical filter 13 can be avoided from deviating from the first position, and the driver's interaction with the driver can be avoided. The intention is to reflect the visible light from the high beam bulb 11, so that the vehicle night vision device can be used reliably to ensure full operation.

In addition, in the present embodiment, even if the energization signal S5 output to the solenoid 17 is output for a predetermined time (for example, 500 ms) or more, when the ON signal S1 from the first position detection switch 18 is not input to the ECU 40, the energization is performed. The output of the signal S5 is stopped. Therefore, it is possible to prevent abnormal heat generation and smoke emission of the solenoid 17 caused by energization when the optical filter 13 is abnormal.

When the operation of moving the filter 13 from the first position to the first position again during energization of the solenoid 17 is repeated a predetermined number of times (for example, 4 times), the output of the energization signal S5 is stopped. Therefore, even if the solenoid 17 deteriorates and the electromagnetic force generated by energization becomes weak, it is possible to prevent the optical filter 13 from repeatedly reciprocating between the first position and a position deviated from this position.

When such an abnormal phenomenon as described above occurs, the operation of the night vision device is forcibly stopped, and a diagnosis such as "abnormality of the optical filter" or "abnormality of the solenoid" is stored. At this time, the warning light is turned on, the fault is reported to the driver, and the activation of the night vision device is prohibited until the next turn on of the light switch. Alternatively, the power supply fuse of the solenoid 17 may be forcibly cut off.

In addition, in this embodiment, the visible light illumination of the low beam mode described below and the visible light illumination of the high beam mode can be switched. It can be switched between using the vision mode to assist the field of vision and using the high beam night vision mode to assist the field of vision.

In the low-beam mode, the high-beam bulb 11 is turned off, the low-beam bulb 12 is turned on, the head-up display 30 is set to non-display, and the low-beam bulb 12 is used for visible light illumination.

In the high beam mode, the two bulbs 11 and 12 are turned on, the filter 13 is moved to the second position, the head-up display 30 is set to non-display, and the two bulbs 11 and 12 are used for visible light illumination.

The low-beam night vision mode is to use the low-beam bulb 12 to perform visible light illumination by making the two light bulbs 11 and 12 light, and to move the optical filter 13 to the first position, and to display the image ahead of the vehicle at night with the head-up display 30 . A way to aid vision.

The high-beam night vision mode is to use the two bulbs 11, 12 to perform visible light illumination by turning on the two bulbs 11, 12, and moving the filter 13 to the second position, and using the head-up display 30 to display the image ahead of the vehicle at night. And the way of auxiliary vision.

other implementations

In the above-mentioned embodiment, the moving mechanism is constituted by the solenoid 17 and the support 16b, but when implementing the present invention, the moving mechanism may be constituted by a motor, and the filter 13 may be driven by the motor.

Claims (6)

1. night viewing device for vehicle comprises:

To vehicle front side distant place irradiation visible light and ultrared going with guide lamp (11),

Shine giving another the right of way of visible light nearby to vehicle front side with guide lamp (12),

Through the infrared ray sensitization that object reflected by vehicle front in the above-mentioned infrared ray being taken the night vision camera machine (20) of the image of vehicle front,

To the read out instrument (30) that shows by the captured image of above-mentioned night vision camera machine (20),

Cover visible light and see through ultrared light filter (13),

Above-mentioned light filter (13) conversion is moved to cover and above-mentionedly go with the 1st position of guide lamp (11) and leave above-mentioned going with the travel mechanism (16b, 17) of the 2nd position of guide lamp (11);

When to being located at the indoor night-vision devices fire switch (51) of car when carrying out making operation, the bright lamp of above-mentioned two guide lamps (11,12), and above-mentioned light filter (13) moves to above-mentioned the 1st position, above-mentioned read out instrument (30) action and show above-mentioned image; It is characterized in that,

Be positioned at above-mentioned the 1st position and above-mentioned when going at above-mentioned light filter (13) with the bright lamp of guide lamp (11); To above-mentioned night-vision devices fire switch (51) carried out opening operation and with above-mentioned go turn off the light with guide lamp (11) after, above-mentioned light filter (13) moves to above-mentioned the 2nd position.

2. night viewing device for vehicle according to claim 1; It is characterized in that; Under the situation of having carried out above-mentioned opening operation, from above-mentioned go turn off the light to pass through more than the specified time with guide lamp (11) after, above-mentioned light filter (13) moves to above-mentioned the 2nd position.

3. night viewing device for vehicle according to claim 1 and 2 is characterized in that, to being located at the indoor distance light operating mechanism (52) of car when carrying out making operation, and above-mentioned going with the bright lamp of guide lamp (11),

Be positioned under above-mentioned the 1st position and the above-mentioned state that goes with the bright lamp of guide lamp (11) at above-mentioned light filter (13); Above-mentioned distance light operating mechanism (52) has been carried out under the situation of making operation, and above-mentioned going keeps lighting lamp state and above-mentioned light filter (13) to move to above-mentioned the 2nd position with guide lamp (11).

4. night viewing device for vehicle according to claim 1 and 2 is characterized in that, above-mentioned travel mechanism (16b, 17) is made up of the screw actuator (17) that is located at the metallic parts (16b) on the above-mentioned light filter (13) and be located on the vehicle,

The electromagnetic force that is utilized in the last circulating current of above-mentioned screw actuator (17) and produces, above-mentioned metallic parts (16b) are attracted by above-mentioned screw actuator (17), thus above-mentioned light filter (13) moves in above-mentioned the 1st position and above-mentioned the 2nd position.

5. night viewing device for vehicle according to claim 4 is characterized in that, when above-mentioned metallic parts (16b) were attracted by above-mentioned screw actuator (17), above-mentioned light filter (13) moved to above-mentioned the 1st position,

Have the above-mentioned light filter of detection (13) and moved to above-mentioned the 1st position Detection mechanism (18),

Even in above-mentioned screw actuator (17) the alive time of upper reaches is more than the specified time, do not detecting under the situation about moving with above-mentioned testing agency (18) to above-mentioned the 1st position yet, stop to switch on to above-mentioned screw actuator (17).

6. night viewing device for vehicle according to claim 4; It is characterized in that; In above-mentioned screw actuator (17) galvanization; Above-mentioned light filter (13) moves to above-mentioned the 1st position once more after above-mentioned the 1st position moves out action has been carried out stipulated number when above repeatedly, stops to switch on to above-mentioned screw actuator (17).

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