JP2003182401A - Display device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device for a vehicle having excellent visibility of a display image. <P>SOLUTION: This display device for the vehicle has a screen for displaying an image projected by a projector, a direction change means for changing an emitting direction of reflected light of the screen, an incident light detection means for detecting light made incident on the screen, a driving means for advancing the direction change means to the surface of the screen and evacuating the direction change means from the surface of the screen, a storing part for storing the direction change means saved from the surface of the screen, and a control means for controlling the driving means to advance the direction change means to the surface of the screen when incident light is detected based on the detection result of the incident light detection means and to evacuate the direction change means from the surface of the screen when incident light is not detected. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular display device installed on an instrument panel in front of a vehicle and transmitting various information to a driver.

[0002]

2. Description of the Related Art A display is installed at the upper center of an instrument panel to display a received image of a television broadcast, a road map of a navigation device, etc. A display device for a vehicle that displays information is known.

Incidentally, the screen surface of the vehicle display device is subjected to antireflection processing such as AR coating and diffusion processing such as matting processing to reduce reflection of extraneous light such as sunlight on the screen surface. Has become.

[0004]

However, when the sunlight transmitted through the side glass of the vehicle is specularly reflected on the screen surface of the display device and the reflected light enters the eyes of the driver,
There is a problem that the visibility of the image displayed on the display is reduced.

In order to prevent the visibility of the displayed image from being deteriorated due to the reflection of the external light, a filter for changing the direction of the reflected light of the external light to prevent the reflected light from entering the eyes of the driver,
When the filter is always mounted on the screen, there is a problem that dust or the like is accumulated on the surface of the filter to reduce the transmittance of the filter, and the display quality of the image displayed on the screen is degraded.

An object of the present invention is to provide a vehicular display device in which the visibility of the displayed image is good.

[0007]

In order to achieve the above object, a vehicular display device according to the present invention is a screen for displaying an image projected by a projector and a direction change for changing the emission direction of the reflected light of the screen. Means, incident light detection means for detecting light incident on the screen, drive means for advancing the direction changing means to the surface of the screen and retreating from the surface of the screen, and retreating from the surface of the screen. Based on the detection result of the incident light detecting means and the housing portion that accommodates the direction changing means, when the incident light is detected, the direction changing means is advanced to the surface of the screen, and the incident light is not detected. Control means for controlling the drive means so as to retract the direction changing means from the surface of the screen. To. A cleaning unit may be further provided for cleaning the surface of the direction changing unit when the direction changing unit is driven by the driving unit. You may make it further provide the static elimination means which eliminates the static electricity of the surface of the said direction change means. The control means is
The direction changing means may be retracted from the screen surface after a predetermined time elapses after the incident light detection means stops detecting incident light. It is preferable that the apparatus further includes reflection reducing means for reducing reflection on the surface of the screen, and when the direction changing means is retracted from the surface of the screen, the reflection reducing means is positioned on the surface of the screen. The direction changing unit and the reflection reducing unit are each made of a continuous flexible material, and the control unit causes the reflection reducing unit to move the reflection reducing unit to the surface of the screen when the incident light is detected by the incident light detecting unit. When the incident light is no longer detected by the incident light detection means, the direction change means is retracted from the surface of the screen by driving the drive means so as to move the direction change means to the surface of the screen. It is preferable to drive the driving means so that the reflection reducing means is advanced to the surface of the screen. Further, a cleaning means for cleaning the surface of the direction changing means may be further provided near the position where the direction changing means bends, between the surface of the screen and the storage portion.

[0008]

According to the present invention, the following effects can be obtained. (1) According to the invention of claim 1, when the incident light detecting means for detecting the light incident on the screen detects the incident light, the direction changing means is advanced to the surface of the screen, and the incident light is not detected. Since the direction changing means is retracted from the surface of the screen and stored in the storage portion, it is possible to prevent the visibility of the display image from being deteriorated by the reflected light of the screen and to prevent dust or the like from adhering to the surface of the direction changing means. It can be prevented. (2) According to the second aspect of the present invention, when the direction changing means is driven by the driving means, the surface of the direction changing means is cleaned by the cleaning means, so that dust or the like on the surface of the direction changing means can be removed. (3) According to the third aspect of the invention, since the static eliminating means eliminates static electricity on the surface of the direction changing means, it is possible to make it difficult to attach dust or the like to the surface of the direction changing means. (4) According to the invention of claim 4, the direction changing means is retracted from the screen surface after a predetermined time elapses after the incident light is no longer detected by the incident light detecting means. So-called flapping can be prevented. (5) According to the inventions of claims 5 and 6, when the direction detecting means is retracted from the surface of the screen, the reflection reducing means is positioned on the surface of the screen, and therefore the direction changing means is retracted. Even at times, reflection on the screen surface can be reduced. Moreover, since the direction detecting means and the reflection reducing means are continuously formed of a flexible material, the respective switching can be smoothly performed. (6) According to the invention of claim 7, since the cleaning means for cleaning the surface of the direction changing means is further provided near the position where the direction changing means bends, the surface of the direction changing means can be easily cleaned.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION << First Embodiment >> A vehicle display device according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a basic configuration of a vehicle display device according to a first embodiment of the present invention.

As shown in FIG. 1, the vehicular display device according to the first embodiment comprises a projector 10, a screen 20, a window reflection preventing film 30, an extraneous light regular reflection preventing film 40, and a surface reflection reducing film. 140, the guide 50, the storage device 60, and the sunlight direction detection sensor 7
0, a take-up roller 90 having a gear motor, and a switching controller 80 for controlling the take-up roller 90. The guide 50 supports the screen 20, the window reflection prevention film 30, the extraneous light regular reflection prevention film 40, and the surface reflection reduction film 140. The extraneous light regular reflection prevention film 40 and the surface reflection reduction film 140 are stored in the storage device 60. Sun direction detecting means 70
Are connected to the switching controller 80 by wire or wirelessly such as infrared rays and radio waves. The switching controller 80 is configured as a control unit having a CPU, for example. The projector 10, the storage device 60, and the switching controller 80 are installed in the instrument panel 400 by a support member (not shown), and the guide 50 is attached to the instrument panel 400 by a mounting member (not shown).

The vehicular display device according to the first embodiment screens vehicle information such as vehicle speed and engine speed projected from the projector 10 as well as various information such as a road map of a navigation device and an operating state of an audio device. It is a so-called arbitrary image display device for displaying on 20. By operating a function switch (not shown) arranged around the screen 20, the driver can switch the display screen or operate a device corresponding to the switch. For example, the projector 10 is mounted inside the instrument panel 400, and the screen 20 is arranged at a position near the center of the instrument panel 400 so that the driver 110 can easily see it.

As shown in FIGS. 2 and 3 which are sectional views taken along the line AA of the vehicular display device shown in FIG. 1, the window reflection preventing film 30 is composed of, for example, a filter having a fine louver structure, and has a screen 20. It is integrated with.
The window reflection prevention film 30 controls the emission direction and the visible range of the display light from the projector 10 by the louver, and prevents the display image on the screen 20 from being reflected on the side glass or the like of the vehicle. The surface reflection reduction film 140 is, for example, non-reflection processed (AR coat)
It is made of a transparent acrylic sheet that has been subjected to a diffusion treatment (matting treatment), and reduces reflection of extraneous light on the display screen on the screen 20.

As shown in FIG. 4, the extraneous light regular reflection preventing film 40 is composed of, for example, a transmissive screen having an extraneous light reflection surface 260 and a black coating portion 270, and the extraneous light such as sunlight directly incident from the side glass. It is possible to prevent the visibility of the displayed image from being reduced due to the light being directly reflected on the surface of the screen 20. The external light reflection surface 260 is inclined, and the sunlight 240 incident from the side glass is specularly reflected by the inclined surface. That is, the sunlight 240 is specularly reflected by the external light reflection surface 260 to become specularly reflected light 250, and does not reach the driver's eyes 110. Further, the sunlight 241 incident on the extraneous light regular reflection preventing film 40 from diagonally above is absorbed by the black coating portion 270. This ensures that only the display light 100 from the projector 10 is visible to the driver.
10, the visibility of the display image on the screen 20 is not reduced.

As shown in FIG. 4, the extraneous light regular reflection preventing film 40 has a structure in which dust and the like are easily deposited on the surface,
When always worn to prevent specular reflection of extraneous light,
The transmittance of the image is reduced and the quality of the displayed image is reduced. Therefore, in the vehicular display device according to the first embodiment of the present invention, the direction of the sunlight that is the external light that adversely affects the display image on the screen 20 is detected, and based on the detected direction of the sunlight. Extraneous light specular reflection prevention film 4
0 and the surface reflection reduction film 140 are switched on the screen 20. That is, when the reflected light of the sun light that is specularly reflected by the screen 20 enters the driver's eye range 150 (see FIG. 5), the extraneous light regular reflection preventing film 40 is mounted on the screen 20 to reflect the reflected light of the sun light. If the light does not enter the driver's eye range 150, the extraneous light regular reflection prevention film 40 is housed and the surface reflection reduction film 140
Is mounted on the screen 20. Sun direction detecting means 7
The detection of the direction of the sun by 0 will be described later.

FIG. 2 shows a state in which the extraneous light regular reflection preventing film 40 is mounted on the screen 20 and the window reflection preventing film 30, and FIG. 3 shows the extraneous light regular reflection preventing film 40 wound up in the storage device 60. The state where the film is housed and the surface reflection reduction film 140 is mounted on the screen 20 and the window reflection preventing film 30 is shown. In addition,
The extraneous light regular reflection preventing film 40 and the surface reflection reducing film 140 are each made of a flexible material, and are seamlessly connected to each other, and the visibility of the display image on the screen 20 is reduced when the two are switched. There is no such thing.

The storage device 60 is, for example, a screen 20.
It has a pair of substantially cylindrical cases arranged on the left and right sides of the case. Let the left and right storage devices 60 be 60L and 60R, respectively. The storage devices 60L and 60R are provided on the vehicle front side with respect to the screen 20, and the ends of the extraneous light regular reflection prevention film 40 and the surface reflection reduction film 140 are guided by rollers 130L and 130R, respectively. The motor 90L is wound around the take-up rollers 90L and 90R provided in the storage devices 60L and 60R.
90R moves the surface of the screen 20. The take-up rollers 90L and 90R are rotationally driven by, for example, a driving device having a gear and a motor. Motor 90L, 9
The 0R drives the external light regular reflection prevention film 40 and the surface reflection reduction film 140 to be wound up in accordance with a command signal from the switching controller 80. The extraneous light regular reflection prevention film 40 and the surface reflection reduction film 140 which are respectively wound by the winding rollers 90L and 90R are stored in the storage devices 60L and 60R, respectively. The switching controller 80 determines whether to mount or store the extraneous light regular reflection prevention film 40 based on a signal from a sun direction detection sensor 70 described later,
The take-up rollers 90L and 90R are driven.

As shown in FIG. 2, the switching controller 80
When the take-up roller 90R is driven by, the surface reflection reduction film 140 moves smoothly via the roller 130R, is taken up by the take-up roller 90R, and is stored in the storage device 90R. On the other hand, as shown in FIG.
When the take-up roller 90L is driven by the switching controller 80, the extraneous light regular reflection preventing film 40 moves smoothly through the roller 130L, is taken up by the take-up roller 90L, and is housed in the housing device 60L. The take-up rollers 90L and 90R are configured so that when one is performing a take-up operation, the other is freely rotatable and does not interfere with the take-up operation.

Next, a method of detecting the direction of the sun by the direction sensor 70 of the sun will be described with reference to FIGS. FIG. 5 is a plan view of the screen 20 showing the positional relationship between the regularly reflected light of the sun and the eye range 150 of the driver. Here, the left side of FIG. 5 shows the front of the vehicle, and the upper side of FIG. 5 shows the right side of the vehicle as seen by the driver. As shown in FIG. 5, the screen 20 is arranged substantially in the center of the instrument panel between the driver seat and the passenger seat, and the sunlight from the right side of the vehicle is blocked by the driver and does not reach the screen 20. . Also, no one is sitting in the passenger seat,
It is also assumed that nothing that blocks sunlight is placed. Sunlight 18
The specularly reflected lights of 0, 190 and 200 specularly reflected by the screen 20 are designated as 180r, 190r and 200r, respectively. These regular reflection lights 180r, 190r, 200r
Enters the driver's eye range 150 and goes to screen 2
The visibility of the display image of 0 is reduced. The regular reflection light 180r of the sunlight 180 reaches the right end of the driver's eye range 150, and the regular reflection light 200r of the sunlight 200 reaches the left end of the driver's eye range 150. That is, when sunlight enters from between the sunlight 180 and the sunlight 200, the specular reflection light enters the driver's eye range 150. A range between the sun rays 180 and the sun rays 200 is a regular reflection generation range 170 of the sun rays. The sun direction detection sensor 70 detects the direction of the sun, and the incident sunlight receives the specular reflection generation range 17
Detects whether it exists in 0.

FIG. 6 shows a schematic structure of the sun direction detection sensor 70. The sun direction detection sensor 70 is installed on the instrument panel 400 above the screen 20 as shown in FIG. 1, and detects the received light level of the sunlight that has passed through the slit-shaped light receiving window 220 and is incident on the light receiving element 230. By detecting, the direction of the sun is detected. Light receiving window 22
0 means that the reflected light specularly reflected by the screen 20 passes through almost the center of the driver's eye range 150, and is the sunlight 190.
Are arranged in a direction opposite to.

FIG. 7 is a diagram showing how sunlight is incident on the light receiving element 230, and FIG. 8 is a diagram showing the relationship between the direction of the sun and the light receiving level. As shown in FIG. 7, the sunlight that has passed through the slit-shaped light receiving window 220 enters the light receiving element 230. The position of sunlight incident on the light receiving element 230 is
It moves according to the direction of the sun. The light receiving element 230 is shown in FIG.
As shown in FIG. 6, when the light receiving level according to the position of the incident sunlight is generated and the sunlight 190 orthogonal to the light receiving window 220 passes through the light receiving window 220 and enters the light receiving element 230, the highest light receiving level is obtained. Generate. The sunlight 1 existing at both ends of the regular reflection generation range 170 of the sunlight shown in FIG.
Let L1 be the light receiving level when 80 and 200 enter the light receiving element 230. That is, when the sun is in the regular reflection generation range 170 of sunlight, the light receiving level of the light receiving element 230 is L1 or more.

The light receiving element 23 of the sun direction detecting sensor 70
The received light level generated at 0 is sent to the switching controller 80 as a detection signal. The switching controller 80 selectively mounts the extraneous light regular reflection preventing film 40 and the surface reflection reducing film 140 on the screen 20 according to the detection signal.

Next, the operation of the vehicular display device according to the first embodiment of the present invention will be described. Switching controller 8
When the light receiving level of the light receiving element 230 of the sun direction detection sensor 70 becomes L1 or more, 0 determines that the regularly reflected light of the sun specularly reflected on the screen 20 reaches the eye range 150 of the driver. At this time, the switching controller 80
Drives the take-up roller 90R, takes up the surface reflection reduction film 140 and stores it in the storage device 60R, and mounts the extraneous light regular reflection prevention film 40 on the screen 20. The sunlight is specularly reflected by the extraneous light reflection surface 260 of the extraneous light regular reflection prevention film 40 to become specular reflection light 250,
The driver's eyes 110 are not reached.

If the light receiving level of the light receiving element 230 of the sun direction detecting sensor 70 decreases to L2 from the state where the extraneous light regular reflection preventing film 40 is mounted on the screen 20, it is determined that the switching controller 80 cannot detect sunlight. to decide. The switching controller 80 drives the take-up roller 90L, takes up the extraneous light regular reflection preventing film 40 and stores it in the storage device 60L, and mounts the surface reflection reduction film 140 on the screen 20.

When the sunlight is not detected, that is, when the light receiving level of the light receiving element 230 of the sun direction detecting sensor 70 is less than L1, the surface reflection reducing film 140 is mounted on the screen 20. When the light receiving level of the light receiving element 230 of the sun direction detection sensor 70 rises to L1 from this state, the switching controller 80 drives the take-up roller 90, and the surface reflection reduction film 1
40, and the extraneous light specular reflection preventing film 40 is attached.

In the sun direction detection sensor 70, the light receiving level L1 (first reference value)> light receiving level L2 (second reference value) is set, and the detection of sunlight, that is, the mounting 40 of the extraneous light regular reflection film is performed. The received light level L1 to be judged,
Undetected sunlight, that is, anti-reflection film for extraneous light 4
There is a difference in the light receiving level L2 for judging the storage of 0. That is, when the extraneous light regular reflection preventing film 40 is stored, even if the reflected light of the sun does not reach the eye range 150 of the driver, the operation of storing the extraneous light regular reflection preventing film 40 is performed until the received light level becomes L2 or less. Do not do. This makes it possible to prevent so-called chattering in which the extraneous light regular reflection preventing film 40 is repeatedly mounted and stored.

As described above, in the vehicular display device according to the first embodiment of the present invention, when sunlight is detected, that is, the specularly reflected light of the sun specularly reflected on the screen is the driver's eye. When entering the range, the flexible extraneous light regular reflection preventing film 40 is mounted on the screen 20. As a result, it is possible to prevent the visibility of the display image on the vehicular display device from being deteriorated due to the specular reflection light of the sun that is incident from the side glass of the vehicle and specularly reflected by the screen 20. Also, if no sunlight is detected,
In other words, the specular reflection of sunlight is the driver's eye range 15.
If it does not reach 0, the extraneous light anti-reflection film 40
By storing the above, it is possible to prevent dust and the like from accumulating on the extraneous light regular reflection preventing film 40 and deteriorating the image quality of the image displayed on the screen 20.

Further, the light receiving level L1 of the light receiving element when it is determined that the sunlight in which the regular reflection light falls within the driver's eye range is detected, and the light receiving level L2 of the light receiving element when it is determined that the sunlight is no longer detected. Is set so that L1> L2. Light receiving level L1
Since the extraneous light regular reflection preventing film 40 is mounted on the screen and the extraneous light regular reflection preventing film 40 is stored at the light receiving level L2, it is possible to prevent the extraneous light regular reflection preventing film 40 from being undesirably mounted and stored repeatedly. it can.

<< Second Embodiment >> A vehicle display device according to a second embodiment of the present invention will be described with reference to FIG. The basic configuration of the vehicle display device according to the second embodiment is similar to that of the first embodiment shown in FIG. Here, differences from the first embodiment will be mainly described. 9 is a cross-sectional view of the vehicular display device according to the second embodiment, and FIG. 2 of the above-described first embodiment,
It corresponds to FIG. In FIG. 9, components having the same functions as those in the first embodiment are designated by the same reference numerals.

As shown in FIG. 4 described above, the extraneous light regular reflection preventing film 40 includes the extraneous light reflection surface 260 and the black coating portion 2.
70, and has a structure in which dust and the like easily accumulate on the surface thereof. Therefore, in the second embodiment, the cleaning unit 290 is provided to remove dust and the like on the surface of the extraneous light regular reflection preventing film 40.

As shown in FIG. 9, the cleaning section 290 can be constructed as a pair of brushes, for example, the support sections of the left and right storage devices 60L and 60R. In the brush 290, the extraneous light regular reflection prevention film 40 is stored in the storage device 6.
Dust and the like on the surface of the extraneous light regular reflection preventing film 40 is removed when the film is stored in 0 L and mounted on the screen 20. When the extraneous light regular reflection preventing film 40 is stored and mounted, it moves via the roller 130L. The brush 290 is provided in the vicinity of the roller 130L and cleans the surface of the extraneous light specular reflection preventing film 40 that is bent by the roller 130L. Although the surface of the extraneous light specular reflection preventing film 40 has a complicated structure, dust and the like on the surface are easily removed because it is cleaned with a brush while the surface is warped.

The vertical length of the brush 290 is
The length of the extraneous light regular reflection preventing film 40 in the vertical direction is substantially equal to that of the extraneous light regular reflection preventing film 40, and the entire extraneous light regular reflection preventing film 40 can be cleaned. In addition, extraneous light regular reflection prevention film 40
The surface of the is not damaged even if it is cleaned by the brush 290.

The brush 290 is also attached to the storage device 60R, and the surface of the surface reflection reduction film 140 is also cleaned in the same manner. However, since dust or the like is less likely to accumulate on the surface of the surface reflection reduction film 140 as compared with the extraneous light regular reflection reduction film 40, the brush 290 for cleaning the surface reflection reduction film 140 may not be provided.

As described above, in the vehicle display device according to the second embodiment of the present invention, the brush 290 for removing dust and the like on the surfaces of the extraneous light regular reflection preventing film 40 and the surface reflection reduction film 140 is a storage device. It was provided near 60.
Each time the extraneous light specular reflection reducing film and the surface reflection reducing film are stored in and taken out of the storage device 60 for storage and mounting, their surfaces are cleaned by the brush 290. As a result, it is possible to prevent dust and the like from accumulating on the surface of the extraneous light regular reflection reducing film 40 and degrading the image quality of the display image on the screen 20.

<< Third Embodiment >> A vehicle display device according to a third embodiment of the present invention will be described with reference to FIG. The basic configuration of the vehicle display device according to the third embodiment is the same as that of the first embodiment shown in FIG. Here, differences from the first embodiment will be mainly described. 10 is a sectional view of the vehicular display device according to the third embodiment, and corresponds to FIGS. 2 and 3 of the first embodiment described above. In FIG. 10, those having the same functions as those in the first embodiment are designated by the same reference numerals.

In the third embodiment, as shown in FIG. 10, a conductive film coating 45 is applied to the surface of the extraneous light regular reflection preventing film 40. The accommodating device 61 into and out of which the extraneous light antireflection film 40 coated with the conductive film coating 45 has conductivity, and the extraneous light antireflection film 40 coated with the conductive film coating 45 is provided.
Is configured to be electrically connected to the storage device 61. The storage device 61 includes a grounding device 300 (ground wire or the like).
Are connected. The conductive film coating 45 is
For example, a transparent conductive film made of an ITO (Indium Tin Oxide) film or the like can be used. The performance of the extraneous light regular reflection preventing film 40 is not affected even if the conductive film coating 45 is applied.

Further, the vehicle display device according to the third embodiment removes dust and the like on the surfaces of the extraneous light regular reflection preventing film 40 and the surface reflection reducing film 140, as in the above-described second embodiment. A brush 290 is provided.

The extraneous light antireflection film 40 coated with the conductive film 45 is grounded by the grounding wire 300 through the storage device 61, and the static electricity on the surface is removed. As a result, adhesion of dust and the like to the surface of the extraneous light regular reflection preventing film 40 is reduced, and the brush 29
Cleaning of the surface of the extraneous light regular reflection preventing film 40 by 0 is easily performed.

The vehicle display device according to the third embodiment includes the extraneous light regular reflection preventing film 40 and the surface reflection reducing film 140 depending on the direction of the sun, as in the first embodiment described above. Because of switching, the amount of dust or the like attached to the surface of the extraneous light regular reflection preventing film 40 is small. The vehicle display device according to the third embodiment eliminates static electricity on the surface of the extraneous light regular reflection preventing film 40 as described above, and thus dust and the like are less attached. Therefore, the brush 290 for removing accumulated dust and the like may be omitted. However, by providing the brush 290, dust and the like can be removed more reliably, and the image quality of the display image on the screen 20 does not deteriorate.

<< Fourth Embodiment >> The basic configuration of a vehicle display device according to the fourth embodiment is the same as that of the first embodiment shown in FIG. Here, differences from the first embodiment will be mainly described.

In the vehicle display device according to the above-described first embodiment, the light receiving levels L1 and L2 of the light receiving element 230 of the sun direction detecting sensor 70 are set, and the light receiving element 2 is set.
When the light receiving level of 30 rises to L1, the extraneous light regular reflection preventing film 40 is attached, and when the light receiving level decreases from L1 to L2, the extraneous light regular reflection preventing film 40 is stored. In the vehicle display device according to the fourth embodiment, the switching controller 80 has different judgment criteria for judging attachment and storage of the extraneous light regular reflection preventing film 40. The details will be described below.

In the relationship between the position of the sunlight and the light receiving level of the light receiving element 230 of the sun direction detection sensor 70 shown in FIG. 8, the sunlight 180 and 200 at both ends of the regular reflection generation range 170 of the sunlight are received. The light receiving level when incident on the element 230 is L1. Similarly to the first embodiment, the switching controller 80 detects the sunlight whose reflected light reaches the driver's eye range 150 when the light receiving level of the light receiving element 230 of the sun direction detection sensor 70 rises to L1. Determine that At this time, the switching controller 8
In 0, the take-up roller 90 is driven to mount the extraneous light regular reflection preventing film 40 on the screen 20.

The external light regular reflection preventing film 40 is mounted on the screen 20, that is, the received light level is L1.
From the above state, when the light receiving level of the light receiving element 230 falls below L1, the switching controller 80 determines that the sunlight is no longer detected, and the timer (not shown) causes the light receiving level to fall below L1 and no sunlight is detected. Measure time. Undetected sunlight is constant time (for example, 5-10 seconds)
When continuing, the switching controller 80 drives the take-up roller 90 to store the extraneous light regular reflection prevention film 40 in the storage device 60L.

FIG. 11 is a flow chart showing a processing procedure of a mounting / storing control program for the extraneous light regular reflection preventing film 40 in the switching controller 80 of the third embodiment. This process is started by turning on an ignition switch (not shown).

In step S1, the sun direction detection sensor 7
Send a signal to 0 to start sun direction detection. In step S2, the light receiving element 230 of the sun direction detection sensor 70
It is determined whether the light-receiving level of (1) rises to L1 and the specularly reflected light of the sun reaches the eyes of the driver. Step S2
When the light receiving level rises to L1 and it is determined that the sun's regular reflection light enters the driver's eyes, the process proceeds to step S3, the winding roller 90 is driven, and the extraneous light regular reflection prevention film 40 is placed on the screen 20. To be attached to.

In the subsequent step S4, the received light level is L1 while the extraneous light regular reflection preventing film 40 is attached.
As described above, it is determined whether or not the regularly reflected light of the sun enters the eyes of the driver. When the negative determination is made in step S4 and the specular reflection light of the sunlight does not enter the eyes of the driver and the sunlight is not detected, the process proceeds to step S5. In step S5, the duration of light reception level L1 or less is measured, and it is determined whether or not sunlight has not been detected for a certain period of time (for example, 5 seconds). If a negative determination is made in step S5, the process returns to step S4.
On the other hand, if the determination in step S5 is affirmative and it is determined that the undetected sunlight has continued for a certain time, the process proceeds to step S6. In step S6, the take-up roller 90 is driven to store the extraneous light regular reflection prevention film 40 in the storage device 60L.

As described above, in the vehicular display device according to the fourth embodiment, the light receiving level of the light receiving element 230 of the sun direction detecting sensor 70 is below L1, and the reflected light is within the driver's eye range. The extraneous light specular reflection preventing film 40 is housed when a certain amount of sunlight is no longer detected for a certain period of time. As a result, it is possible to prevent the so-called fluttering in which the extraneous light regular reflection preventing film 40 is repeatedly mounted and stored.

<< Fifth Embodiment >> A vehicle display device according to a fifth embodiment of the present invention will be described with reference to FIGS. The vehicular display device according to the fifth embodiment has a plate-like extraneous light regular reflection prevention plate 310 instead of the extraneous light regular reflection prevention film 40 in the above-described first to fourth embodiments. 12 to 14, components having the same functions as those of the above-described first to fourth embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. Here, differences from the first to fourth embodiments will be mainly described.

FIG. 12 shows the basic structure of a vehicle display device according to the fifth embodiment of the present invention. FIG. 12 shows a state in which the extraneous light regular reflection preventing plate 310 is mounted on the screen 20. Similar to the first embodiment, the screen 20 is integrally formed with a window reflection preventing film 30 including a filter having a louver structure and the like, and further, as a surface reflection reducing film 141, an antireflection treatment (AR coating). ) And diffusion treatment (matte treatment). The screen 20 in which the window reflection preventing film 30 and the surface reflection reducing film 141 are integrally formed is mounted on the instrument panel 400 by a mounting member (not shown).
Is attached to.

The extraneous light regular reflection preventing plate 310 is formed by attaching the extraneous light regular reflection preventing film 40 having the structure shown in FIG. 4 to a transparent acrylic plate or the like to form a plate, and includes an extraneous light regular reflection surface 260 and a black coating portion. Has 270. A conductive film coating 45 is applied to the surface of the extraneous light regular reflection preventing plate 310. The extraneous light regular reflection preventing plate 310 is formed in a size that covers the entire screen 20 completely. When the extraneous light regular reflection prevention plate 310 is mounted on the screen 20, the sunlight 240 is specularly reflected by the extraneous light regular reflection surface 260 to become reflected light 250, and does not reach the driver's eyes 110.

As shown in FIGS. 12 to 14, the vehicle display device according to the fifth embodiment is provided with a switching controller 80, a switching device 340, and a storage section 350 on the back side of the instrument panel in the upper center part. There is. The switching controller 80 is connected to the sun direction detecting sensor 70 by wire or wirelessly, and instructs the switching device 340 to store and mount the extraneous light regular reflection preventing plate 310 according to the detection result of the sun direction detecting sensor 70. To send. Switching device 3
The switching controller 8 is composed of, for example, an extendable / retractable mechanism driven by a gear and a motor.
In response to the instruction signal from 0, the extraneous light regular reflection preventing plate 310
Store and install the. An external light specular reflection preventing plate 310 is swingably connected to the tip of the retractable retractable mechanism of the switching device 340 via, for example, a hinge structure 320.

The switching controller 80 and the switching device 3
40 and the hinge structure 320 each have conductivity, and the extraneous light regular reflection preventing plate 310 provided with the conductive film coating 45 includes the hinge structure 320 and the switching device 34.
It is electrically connected to the switching controller 80 via 0. The switching controller 80 is grounded by a ground wire 300. The external light antireflection plate 310 provided with the conductive film coating 45 includes a hinge structure 320 and a switching device 34.
0 and ground via the switch controller 80 to remove static electricity on the surface. As a result, adhesion of dust or the like to the surface of the extraneous light regular reflection preventing plate 310 is reduced.

The accommodating portion 350 includes the extraordinary light regular reflection preventing plate 31.
The switching device 3 is configured as a case for storing 0.
The mechanism 40 for loading and unloading 40 and the hinge structure 320 are used for the storage portion 350.
To move inside. A lid 330 to which a brush or the like is attached is provided near the opening of the storage section 350. The lid 330 with a brush is openably and closably attached to the instrument panel 400 by a pin 331. The width of the lid 330 in the vehicle left-right direction is substantially the same as the width of the extraneous light reflection preventing plate 310 in the vehicle left-right direction.

FIG. 13 shows a state in which the extraneous light regular reflection preventing plate 310 is housed in the housing means 350. At this time, the retracting mechanism of the switching device 340 is contracted most, the extraneous light regular reflection preventing plate 310 is completely housed in the housing device 350, and the lid 330 is closed. When the extraneous light regular reflection preventing plate 310 is mounted on the screen 20, the switching device 340 is driven from the housed state shown in FIG. When the switching device 340 is driven, the take-out mechanism of the switching device 340 extends to the vehicle rear side, and accordingly, the hinge structure 320 and the extraneous light regular reflection prevention plate 310 move to the vehicle rear side. FIG. 14 shows a state in which the loading / unloading mechanism of the switching device 340 is fully extended while the external light regular reflection preventing plate 310 is being switched between mounting and storing. At this time, the extraneous light regular reflection preventing plate 310 is not yet mounted on the screen 20.

At this time, the lid 330 is fully opened by being pushed by the extraneous light regular reflection preventing plate 310 moving to the vehicle rear side. When the extraneous light regular reflection preventing plate 310 passes through the lid 330, the surface thereof is cleaned with a brush to remove dust and the like adhering to the surface.

From the state shown in FIG. 14, the extraneous light regular reflection prevention plate 310 slowly moves to the state shown in FIG. 12 by gravity, and the extraneous light regular reflection prevention plate 3 is placed on the screen 20.
10 is attached.

When the extraneous light regular reflection preventing plate 310 is to be stored from the mounted state shown in FIG. 12, the switching device 340 is driven to contract the retracting mechanism. When the loading / unloading mechanism moves to the front side of the vehicle, the extraneous light specular reflection preventing plate 310 swingably connected to the hinge mechanism 320 is lifted with the opening end of the storage section 350 as a fulcrum, and the state shown in FIG. Move to the state shown in 14. Thereafter, the extraneous light specular reflection prevention plate 310 moves inside the storage section 350 toward the front side of the vehicle as the retracting mechanism of the switching device 340 contracts. As shown in FIG. 13, when the retracting mechanism of the switching device 340 is contracted to the maximum, the extraneous light regular reflection preventing plate 310 is completely stored in the storage portion 350, and the lid 330 is also closed to complete the storage.

Even when the extraneous light regular reflection preventing plate 310 is housed, the surface of the extraneous light regular reflection preventing plate 310 is cleaned by a brush attached to the lid 330 to remove dust and the like adhering to the surface.

Next, the operation of the vehicle display device according to the fifth embodiment will be described. Note that the sun direction detection sensor 70 detects sunlight that is specularly reflected by the screen 20 and enters the driver's eyes 110, as in the first embodiment described above.

Light receiving element 23 of sun direction detection sensor 70
When the light receiving level of 0 rises to L1 shown in FIG. 8, the switching controller 80 extends the retracting mechanism of the switching device 340 so as to mount the extraneous light regular reflection preventing plate 310 stored in the storing portion 350 on the screen 20. Then, the extraneous light regular reflection preventing plate 310 is mounted on the screen 20. The surface of the extraneous light regular reflection preventing plate 310 is cleaned by a brush or the like attached to the lid 330 when passing through the opening portion of the housing portion 350. External light specular reflection prevention plate 310
Thus, the sunlight 240 is reflected into reflected light 250 and does not reach the driver's eyes 110. This can prevent the display image on the screen 20 from being deteriorated by the reflected light.

On the other hand, when the light receiving level of the light receiving element 230 of the sun direction detecting sensor 70 decreases from L1 to L2,
The switching controller 80 contracts the retracting mechanism of the switching device 340 so as to store the extraneous light regular reflection preventing plate 310 mounted on the screen 20 in the storage portion 350, and stores the extraneous light regular reflection preventing plate 310 in the storage portion 350. The surface of the extraneous light regular reflection preventing plate 310 is cleaned by a brush or the like attached to the lid 330 when passing through the opening portion of the housing portion 350. When the extraneous light specular reflection preventing plate 310 is completely stored in the storage portion 350, the opening of the storage portion 350 is closed by the lid 330, so that dust and the like can be prevented from entering the storage portion 350.

Even when the extraneous light regular reflection preventing plate 310 is not mounted on the screen 20, the screen 2
0 is provided with the window reflection prevention film 30 and the surface reflection reduction film 141, so that the surface reflection on the screen 20 is reduced.

Whether the extraordinary light specular reflection preventing plate 310 is mounted or accommodated by the switching controller 80 may be judged by the light receiving level of the light receiving element 230 as described above, or as described in the fourth embodiment. You may judge by a light reception level and the non-detection time of sunlight.

As described above, in the vehicular display device according to the fifth embodiment, the window reflection prevention film 30 and the surface reflection reduction film 140 are integrally formed on the screen 20, and the external light is adjusted depending on the direction of sunlight. The antireflection plate 310 is configured to be mounted on the screen 20 or housed in the housing unit 350. The extraneous light specular reflection preventive plate 310 is attached to the screen 2 only when the specular reflection of the sun enters the eyes of the driver.
Since it is mounted on the surface of the surface, it is possible to reduce dust and the like adhering to the surface thereof. Further, a conductive film coat 45 is applied to the surface of the extraneous light regular reflection preventing plate 350,
By grounding this to earth, static electricity on the surface is removed. This further reduces the amount of dust and the like attached to the surface of the extraneous light regular reflection preventing plate 310. Further, every time the extraneous light regular reflection preventing plate 350 is taken in and out from the housing portion 350, the surface thereof is cleaned by the brush attached to the lid 330. This makes it possible to reliably remove dust and the like on the surface of the extraneous light regular reflection preventing plate 310.

The vehicle display device according to the present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the storage device 60 described in the first embodiment.
May be arranged above and below the screen 20, respectively.
In this case, the extraneous light regular reflection preventing film 40 and the surface reflection reducing film 140 are respectively housed in housing devices arranged above and below the screen 20, and moved in the vertical direction of the screen 20 to be mounted. The position of the storage device 60 is not on the front side of the vehicle with respect to the screen 20,
It may be arranged parallel to the screen 20. Further, an extremely fine convex surface or concave surface may be formed on the surface of the screen 20 to perform antireflection treatment.

Although the external light regular reflection preventing member has been described as having a structure including an external light regular reflection surface 260 and a black coating portion 270 as shown in FIG. 4, it may be constituted by a vertical microlouver. Alternatively, a light shielding plate having a fine lattice shape may be used. In other words, the extraneous light specular reflection member prevents the specular reflection light when the sunlight incident from the side glass is specularly reflected on the screen, and has high transparency and is displayed on the screen. Any image can be used as long as it does not reduce the visibility of the image.

The screen 20 may be installed so as to be hung from the ceiling of the vehicle so that it can be easily seen from the rear seats.

In the first to third embodiments described above, the external light specular reflection preventing film 4 by the switching controller 80 is used.
The determination of whether or not 0 is mounted / stored is made based on the light receiving level of the light receiving element 230 of the sun direction detection sensor 70. But,
In the first to third embodiments, as described in the fourth embodiment, sunlight is detected by the light receiving level of the light receiving element 230 to attach the extraneous light regular reflection preventing film 40, and the sunlight is not reflected. The extraneous light regular reflection preventing film 40 may be housed when the detection time reaches a certain time.

In the above-described embodiment, the extraneous light regular reflection preventing film and the extraneous light regular reflection preventing plate are used as the direction changing means for changing the emitting direction of the reflected light of the screen described in the claims. Further, the direction detecting sensor of the sun is used as the incident light detecting means for detecting the light incident on the screen, and the switching device having the winding roller or the take-out mechanism as the driving means is used. The control means corresponds to the switching controller and the cleaning means corresponds to the brush.

In the vehicle display device according to the present invention, the direction changing means for changing the direction of the reflected light is switched according to the direction of the sun so that the direction of the reflected light of the sun enters the eyes of the driver. It applies to all vehicular display devices that are equipped with and that accommodate the direction changing means when the sunlight does not specularly reflect on the screen.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a vehicle display device according to a first embodiment of the present invention.

2 is a cross-sectional view taken along the line AA of the vehicle display device shown in FIG.

3 is a cross-sectional view taken along the line AA of the vehicle display device shown in FIG.

FIG. 4 is a view showing the structure of extraneous light regular reflection preventing means.

FIG. 5 is a diagram showing a positional relationship between the sun's specular reflection light and the driver's eye range.

FIG. 6 is a schematic configuration diagram of a sun direction detection sensor.

FIG. 7 is a diagram showing how sunlight is incident on a light receiving element.

FIG. 8 is a diagram showing the relationship between the direction of the sun and the received light level.

FIG. 9 is a sectional view of a vehicular display device according to a second embodiment.

FIG. 10 is a sectional view of a vehicle display device according to a third embodiment.

FIG. 11 is a flowchart showing a processing procedure of an external light regular reflection preventing film mounting / storing control program in the switching controller according to the fourth embodiment.

FIG. 12 is a configuration diagram of a vehicle display device according to a fifth embodiment.

FIG. 13 is a view showing a state where the extraneous light regular reflection preventing plate shown in FIG. 12 is housed.

FIG. 14 is a view showing mounting of an external light regular reflection preventing plate shown in FIG.
The figure which shows the state in the middle of switching of storage.

[Explanation of symbols]

10: Projector 20: Screen 30: Window reflection prevention film 40: Antireflection film for extraneous light 45: Conductive film coating 60,350: Storage device 70: Sensor for detecting the direction of the sun 80: Switching controller 90, 340: Switching device 140, 141: Surface reflection reduction film 290: Brush 310: Anti-reflective plate for extraneous light 320: Hinge structure 330: Lid

Claims (7)

[Claims] 1. A screen for displaying an image projected by a projector, a direction changing means for changing an emission direction of reflected light from the screen, an incident light detecting means for detecting light incident on the screen, and the direction changing. Driving means for advancing the means to the surface of the screen and retreating from the surface of the screen; a housing portion for housing the direction changing means retracted from the surface of the screen; and a detection result of the incident light detecting means. Based on this, control means for controlling the driving means so as to advance the direction changing means to the surface of the screen when the incident light is detected and to retract the direction changing means from the surface of the screen when the incident light is not detected. A display device for a vehicle, comprising: 2. The vehicle display device according to claim 1, further comprising a cleaning unit that cleans a surface of the direction changing unit when the direction changing unit is driven by the driving unit. Vehicle display device. 3. The vehicle display device according to claim 1, further comprising a static eliminator for eliminating static electricity on the surface of the direction changing unit. 4. The vehicle display device according to claim 1, wherein the control unit changes the direction after a predetermined time elapses after incident light is no longer detected by the incident light detection unit. A vehicle display device characterized in that the means is retracted from the screen surface. 5. The vehicle display device according to claim 1, further comprising reflection reducing means for reducing reflection on the surface of the screen, wherein the direction detecting means is provided on the screen. The display device for a vehicle, wherein the reflection reducing means is positioned on the surface of the screen when retracted from the surface. 6. The vehicular display device according to claim 5, wherein the direction changing means and the reflection reducing means are each made of a continuous flexible material, and the control means uses the incident light detection means. When the incident light is detected, the driving means is driven so as to retract the reflection reducing means from the surface of the screen and advance the direction changing means to the surface of the screen, and the incident light is detected by the incident light detecting means. When no longer detected, the drive means is driven so as to retract the direction changing means from the surface of the screen and advance the reflection reducing means to the surface of the screen. 7. The vehicle display device according to claim 6, wherein a cleaning means for cleaning the surface of the direction changing means near the position where the direction changing means bends between the surface of the screen and the storage portion. A vehicle display device, further comprising: