JP3518002B2 - Anti-glare device for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle antiglare device for controlling a sun visor based on the direction of the sun and the direction of a signal with respect to the vehicle direction calculated from the position, direction and time of the vehicle.

[0002]

2. Description of the Related Art As a prior art, Japanese Utility Model Laid-Open No. 62-43923 discloses a technique in which the direction of the sun is detected by an optical sensor and the sun visor shields the direction.

That is, the prior art disclosed in Japanese Utility Model Laid-Open No. 62-43923 discloses a plurality of slits fixed to the rear surface of a rearview mirror of a vehicle, each of which has a plurality of slits whose angles are sequentially changed in vertical and horizontal directions. A solar position detector that detects the horizontal and vertical angles of the sun with respect to the vehicle by a sunlight incident angle sensor consisting of multiple photoelectric converters, that is, photosensors, installed behind the slit of It consists of a sun visor formed by appropriately arranging a number of light blocking members capable of controlling light blocking vertically and horizontally adjacent to each other, and a control circuit for selecting a light blocking member of the sun visor according to the output of the sun position sensor to perform a light blocking operation. It is an electronic sun visor device.

[0004]

However, in the above-mentioned conventional technique, there is a problem that the driver does not see what the driver wants to see, for example, the signal of the traffic signal, due to the light-shielding operation by the sun visor as the light-shielding member. .

[0005] In this way, it is a fatal problem for the driver that the traffic light cannot be seen due to the sun visor at the intersection with the traffic light. In addition, as another problem, immediately after sunlight is blocked by a tunnel, an elevated road, a building, or the like, there is a short period of time in which the light-shielding operation is not performed due to the system reaction delay in the conventional technology. There is also the problem that his eyes are dazzled by this moment and it takes time to recover.

That is, this means that the direction of the sun is not determined while driving on a road where sunlight is not directly hit (a place behind an elevated road, in a tunnel, etc.), and the sun goes to a place where it is hit. Immediately after that, the sun visor is not in the position where it should be, which causes the driver to be blinded.

The present invention has been made in view of the above-mentioned problems, and the problems of the above-mentioned prior art are achieved by controlling the sun visor by utilizing the data held by the vehicle navigation device (vehicle route guidance device). It is an object of the present invention to provide an antiglare device for a vehicle that solves the above problem.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a light-shielding portion having a predetermined shape can be formed by electrical control, which is installed in a vehicle for anti-glare purposes. A sun visor, which is mounted on the vehicle for navigation, guides an optimum traveling route according to input conditions, and also a relative position between a traffic signal at an intersection existing in the traveling route and the vehicle and the sun in advance. In order to form a light-shielding portion having a shape that hides the sun in the sun visor from a point before approaching the intersection and hides the sun from the intersection by searching the intersection where the light of the sun is dazzling and the traffic signal is difficult to see And a vehicle route guidance device that supplies the control signal of 1.

Further, according to the present invention, there is provided an antiglare device for a vehicle, wherein the light shielding portion formed on the sun visor has a ring shape. Further, according to the present invention, intended to be installed as an antiglare for inside the vehicle, the sun visor may form a light shielding portion of a predetermined shape by electrical control, it intended to be mounted on the vehicle as a navigation, It guides the optimum travel route according to the input conditions, and in advance searches the road where the sun is glaring and is difficult to drive and hides the sun in the sun visor from a point before the road approaching the road. A vehicle anti-glare device comprising: a vehicle route guidance device that supplies a control signal for forming a light-shielding portion having a shape that enables the vehicle to provide an anti-glare device. Further, according to the present invention, there is provided an antiglare device for a vehicle, wherein the light shielding portion formed on the sun visor has a round shape.

[0010]

With this structure, the glare of sunlight can be automatically and effectively prevented, and the field of view necessary for driving can be secured, so that the driver can drive safely and is comfortable and tired. There is also the effect of reducing.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. That is, as shown in FIG. 2, the antiglare device for a vehicle according to the embodiment of the present invention shown in FIG. 1 shields light by electrically changing the light transmittance of a part of the screen in a ring-shaped or circular part. The sun visor 1 is configured to have a function to perform the above, and the vehicle route guide device 10 that sends a signal for light shielding control to the sun visor 1.

The vehicle route guidance device 10 includes a setting device 6 for inputting a departure place, a departure time, a destination, etc., road map data, and the distance, speed limit, direction, etc. of each road divided at a turning point. Storage device 7 for storing the attributes of the vehicle, the shape of the signalized intersection, the direction of the traffic light when viewed from the front side of the stop line, the clock 8, and the central processing unit (CPU) 9 connected to these.
Composed of.

In the above, the storage device 7 stores map data of the road on which the vehicle can travel, divides the map data of the road into each bending point, and travels the distance and time required to travel for each division. It stores attribute data such as the position of a traffic signal and the direction of a road.

Further, as shown in FIG. 2, the sun visor 1 can be moved and rotated by a mounting shaft 12, and a screen 16 for partially changing the transmittance is provided. The position and rotation angle of the sun visor 1 and the size, shape, and transmittance of the screen 16 are used to determine the route guide device 10 for a vehicle.
You can see the traffic light and the surroundings by controlling with the control signal from, but make the sun invisible.

In the sun visor 1 as described above, the screen 16 may be a mechanical diaphragm, but as described later, a liquid crystal panel may be incorporated to change the transmittance at an arbitrary position.

When a liquid crystal panel is used, when the traffic light and the sun overlap, the central portion 14 has a high transmittance, and a light-shielding portion 15 having a low transmittance in the shape of a ring (or a square frame) is formed around the central portion 14. To be done.

By doing so, the traffic light can be viewed through the central portion 14 of the ring-shaped light shielding portion 15. Then, when the starting and ending points and the departure time are instructed by the setting device 6, the CPU 9 calculates the shortest distance route and the shortest time route between the starting and ending points from the attribute data, and on each road when traveling on these routes. Vehicle position,
Detects roads that hinder driving due to the sun's glare from the direction, traffic lights, and the position of the sun.

As a result, the control of the sun visor 1 is started when a road on which the sun is dazzling is detected. The operation will be described below with reference to the flowchart of FIG.

By the setting device 6, as described above, the departure place,
When the departure time and the destination are input, the CPU 9 calculates the shortest route and the arrival time at the destination (step S
1, S2).

Next, the position of the sun and the relative position of the vehicle during traveling when traveling on the shortest route calculated by the CPU 9 are calculated, and whether or not there is a road on which sunlight is dazzling is calculated based on the calculation result. Whether or not there is an intersection where the sunlight is dazzling and the signal is difficult to see is searched (step S3), and if so, which position of the sun visor 1 is to be shaded so that the sun can be hidden is calculated as described later. If not, the sun visor 1 is not used (step S4).

The conditions for determining whether or not the sunlight is dazzling will now be described. As a standard condition, it is determined to be dazzling if the sun can be hidden by the sun visor 1 and is located within a range of 15 degrees to the left and right with respect to the vehicle traveling direction.

However, since these conditions are standard values and have individual differences, it is preferable that the conditions can be changed. Next, the light-shielding operation control of the sun visor 1 will be described using a specific example.

On the shortest route calculated by the CPU 9 as described above, it is searched whether or not there is a road where the sunlight is dazzling (step S3), and if there is an intersection where the direction of the sun overlaps the direction of the traffic light in front of the driver. It is searched whether there is any (step S5).

As a result, if the direction of the sun passes through the intersection where the traffic signal overlaps, the sun visor 1 is formed with a ring-shaped light shielding portion 15 as shown in FIG. (Step S6).

Further, if the direction of the sun does not pass through the intersection where it overlaps with the traffic light, a round light-shielding portion 17 having the direction of the sun at the center as shown in FIG. 3 is formed (step S).
7). FIG. 5 shows the positional relationship between the driver and the sun visor 1.

In FIG. 5, if the sun is behind the sun visor 1, glare can be prevented. FIG. 6 shows a state in which the sun 20 and the traffic signal 30 are hidden behind the sun visor 1.

FIG. 7 shows a state in which the ring-shaped light shielding portion 15 is formed in the sun visor 1 of the present invention. The traffic light 30 can be clearly seen from the central portion 14 surrounded by the ring-shaped light-shielding portion 15, and the sun 20 is hidden by the ring-shaped light-shielding portion 15.

FIG. 8 shows a sun visor 1 using a liquid crystal panel.
3 is a cross-sectional view of the liquid crystal panel, showing a cross section of the liquid crystal panel. That is, in FIG. 8, the liquid crystal is enclosed between the two transparent plates 18 and 19, and the transparent plates 18 and 19 are not shown.
By selectively applying a voltage to a large number of vertical electrodes and horizontal electrodes formed in, the liquid crystal at the selected position can be driven and light can be blocked.

The sun visor 1 is not limited to the example in which the liquid crystal panel is used, and an electrochromic element or the like may be used.
What has an electro-optically light-shielding function may be incorporated.

The CPU 9 sends the sun visor 1 a signal for forming the above-mentioned light-shielding portion before the vehicle approaches a road where the sunlight is dazzling detected by the CPU 9 or an intersection where the sunlight is dazzling and a signal is hard to see.

The signal sent to the sun visor 1 is transmitted to the grid-like electrodes of the liquid crystal panel, which is a constituent member of the sun visor 1, to form the light shielding portion 15 or 17. In the above description, the shape of the light shielding portion 15 is described as a ring shape centering on the traffic light, but it is sufficient if there is a portion where the signal can be seen in the central portion, and a square shape or a square or rectangular hole shape is opened in the central portion. It may be a thing.

Similarly, the circular light-shielding portion 17 centered on the direction of the sun may be square, rectangular, or elliptical. As described above, after calculating the shortest route to the destination by the vehicle route guidance device, search for whether there is a road where the sunlight is dazzling or whether there is an intersection where it is dazzling and the signal is difficult to see,
By controlling the sun visor before approaching the place and forming a circular or ring-shaped light shielding part in advance,
You can prevent the glare of sunlight before you feel it is dazzling,
It can contribute to safe and comfortable driving.

[0033]

As described above in detail, according to the present invention, the problem of the above-mentioned prior art is caused by controlling the sun visor by utilizing the data possessed by the vehicle navigation system (vehicle route guidance system). It is possible to provide a vehicle antiglare device that solves the above problem.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a detailed view showing a sun visor used in the above embodiment.

3A and 3B are views showing light shielding portions of different shapes formed in the sun visor used in the above embodiment.

FIG. 4 is a flowchart for explaining the operation of the above embodiment.

FIG. 5 is a diagram showing a positional relationship between a driver and a sun visor.

FIG. 6 is a view showing a state in which the sun and a traffic signal are hidden behind a sun visor.

FIG. 7 is a diagram showing a state in which a ring-shaped light shielding portion is formed on the sun visor.

FIG. 8 is a cross-sectional view of a sun visor that uses a liquid crystal panel.

[Explanation of symbols]

1 sun visor 6 setting device 7 storage device 8 clocks 9 CPU 10 Vehicle route guidance device 12 mounting shaft 14 Central 15 Ring-shaped light shield 16 screen 17 Round light shield

Claims (4)

(57) [Claims] 1. A sun visor that is installed in a vehicle for the purpose of preventing glare, and that can form a light-shielding portion having a predetermined shape by electrical control, and a sun visor that is mounted in the vehicle for navigation.
While guiding the optimal travel route according to the input conditions, the intersection of the traffic light which is pre-existing in the travel route in advance and the vehicle and the sun from the relative positional relationship between the sun and the traffic light is difficult to see the intersection And a vehicle route guidance device for supplying a control signal for forming a light-shielding portion having a shape for hiding the sun in the sun visor and for allowing the traffic signal to be seen from a point before a search and approaching the intersection. An antiglare device for a vehicle characterized by the above. 2. The antiglare device for vehicles according to claim 1, wherein the light shielding portion formed on the sun visor has a ring shape. 3. A intended to be installed for the anti-glare inside the vehicle, the sun visor by electric control to form a light shielding portion having a predetermined shape, which is installed in the vehicle as a navigation,
It guides the optimum travel route according to the input conditions, and in advance searches the road where the sun is glaring and is difficult to drive and hides the sun in the sun visor from a point before the road approaching the road. An anti-glare device for a vehicle, comprising: a route guide device for a vehicle, which supplies a control signal for forming a light-shielding portion having a shape capable of achieving the above. 4. The antiglare device for vehicles according to claim 3, wherein the light shielding portion formed on the sun visor has a round shape.