JP2009078651A - Vehicular anti-dazzling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular anti-dazzling device capable of displaying a shading pattern which does not look blurred. <P>SOLUTION: The device comprises a shading pattern display part 400 provided on a windshield surface for bringing a predetermined area into an opaque state, a light source position detecting part 210 for detecting a position of a light source, an eyeball position detecting part 220 for detecting two eyeballs of a driver, and a control processing part for receiving detection signals from the light source position detecting part and the eyeball position detecting part and controlling the shading pattern display part. The device obtains a first intersection of a first straight line connecting the light source and one eyeball position and the windshield surface, a second intersection of a second straight line connecting the light source and the other eyeball position and the windshield surface, and a third straight line connecting the first intersection and the second intersection in the windshield surface, and controls to display the shading pattern P in a slit shape with a predetermined width including the third straight line all over the windshield in the horizontal direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an anti-glare device for a vehicle in order to prevent direct sunlight incident from a vehicle windshield from being generated by generating a light-shielding pattern so that the driver of the vehicle is not dazzled.

  Conventionally, a vehicle has been provided with a sun visor as a light blocking means for blocking direct sunlight from entering the vehicle through the upper portion of the windshield. And, for example, when the vehicle is running toward the morning sun or sunset, the passenger in the driver's seat or passenger seat descends the sun visor to cover the top of the windshield when feeling dazzling, The direct sunlight can be blocked.

  On the other hand, when the sun visor is lowered, the forward field of view becomes narrow, and therefore it is necessary to store the sun visor upward when not in use. For this reason, the vehicle occupant needs to manually raise and lower the sun visor as necessary. However, such an operation is not only troublesome, but it is not preferable for the driver to perform such an operation during driving. Thus, various anti-glare devices for vehicles that automatically shield the upper part of the windshield by detecting the incident state of sunlight have been proposed.

  For example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 2005-35384), the vehicle attitude detection means 4 detects the attitude and orientation of the vehicle, and the light source position detection means 5 causes the light source 1 of the light 3 to give glare to the occupant. The position of the eyeball position detecting means 6 detects the position of the eyeball 9 of the occupant 2. Then, the system control means 8 calculates the position and range on the windshield 13 that shields the light 3 according to the posture and orientation of the vehicle, the position of the light source 1, and the position of the eyeball 9 of the occupant 2. The light 3 is blocked by adjusting the amount of light transmitted through the windshield 13 at the position and range calculated by control. As a result, sufficient light shielding performance can be achieved with the minimum light shielding range, and it is possible to prevent light from being shielded to unnecessary areas. A shading device is disclosed.

Further, in Patent Document 2 (Japanese Patent Application Laid-Open No. 2007-153135), a transmissive display 23 is disposed in front of the driver, and two dimming portions 30L and 30R are formed on the transmissive display 23. These dimming parts 30L, 30R are positioned on a straight line connecting the left and right eyes 40L, 40R of the driver and the sun, and a size slightly larger than the pupil and an anti-glare device for a moving body are disclosed. ing. In this way, the sunlight S is dimmed by the dimming units 30L and 30R, but the lines of sight 41L and 41R when looking at the object 9 that is desired to be present that is located very close to the sun are dimming units 30L. , 30R, the object 9 can be seen.
JP 2005-35384 A JP 2007-153135 A

  Patent Document 1 detects the position of a light source and the position of a driver's eyeball and displays a light shielding pattern at the intersection of a straight line connecting them and the windshield. However, there is a problem for the driver that when the light shielding pattern is displayed on the windshield in front of the front of the vehicle being watched, one pattern appears to scramble to the left and right, distracting the driver's attention. It was. Then, if the driver pays attention to the light shielding pattern and focuses on the light shielding pattern, there is a problem that grasping the situation in front of the vehicle is neglected.

  Further, Patent Document 2 considers that there are two human eyes and divides the light shielding pattern into two to narrow the area of the entire light shielding pattern. However, the same problem as above will occur.

  In order to solve the above-described problems, the invention according to claim 1 is an antiglare device for a vehicle that blocks direct light from a light source incident from a windshield of a vehicle, on the windshield surface. A light-shielding pattern display unit that shields direct light from the light source by providing a predetermined region in an opaque state, a light source position detection unit that detects the position of the light source, and an eyeball position that detects two eyeball positions of the driver of the vehicle A detection unit, and a control processing unit that receives the detection signal from the light source position detection unit and the eyeball position detection unit to control the light shielding pattern display unit, and connects the light source position and one eyeball position. A first intersection that is an intersection between one straight line and the windshield surface; a second intersection that is an intersection between the second straight line connecting the light source position and the other eyeball position and the windshield surface; and the windshield surface Within Obtain a third straight line connecting the first intersection and the second intersection, and control to display a light-shielding pattern on the entire horizontal surface of the windshield with a slit shape having a predetermined width including the third straight line. It is characterized by.

  The invention according to claim 2 is an antiglare device for a vehicle that blocks direct light from a light source incident from a windshield of a vehicle, and is provided on the windshield surface to make a predetermined region opaque. A light-blocking pattern display unit that blocks direct light from the light source, a light source position detection unit that detects the position of the light source, an eyeball position detection unit that detects two eyeball positions of the driver of the vehicle, and a vehicle speed of the vehicle A vehicle speed detection unit, a light source position detection unit, an eyeball position detection unit, and a control processing unit that receives the detection signal from the vehicle speed detection unit and controls the light shielding pattern display unit. A first intersection that is an intersection of the first straight line connecting the eyeball position and the windshield surface, and a second intersection that is an intersection of the second straight line connecting the light source position and the other eyeball position and the windshield surface And the front A third straight line connecting the first intersection and the second intersection in the lath plane is obtained, and a light shielding pattern is displayed in the horizontal direction of the windshield in a slit shape having a predetermined width including the third straight line. The light-shielding pattern is controlled so as to change the horizontal length in accordance with the vehicle speed.

  The invention according to claim 3 is the vehicle antiglare device according to claim 1 or 3, wherein the density of the light shielding pattern is reduced as the distance from the third straight line increases in the vertical direction. .

  According to the antiglare device for a vehicle according to claim 1 of the present invention, a light shielding pattern is displayed on the entire horizontal surface of the windshield in a slit shape having a predetermined width, and the light shielding pattern exceeds the human viewing angle. Therefore, the shading pattern does not appear to be blurred, and it can be suppressed that the driver distracts attention. Then, it is possible to solve the problem that the driver is concerned about the light shielding pattern and neglects to grasp the situation in front of the vehicle.

  According to the vehicle anti-glare device of the second aspect of the present invention, when the vehicle speed is high, the light shielding pattern P is not applied to the windshield in front of the non-driver seat (passenger seat). Therefore, the passenger in the passenger seat does not feel uncomfortable because the light shielding pattern P blocks the field of view.

  Further, according to the vehicle antiglare device according to claim 3 of the present invention, since the light shielding pattern has gradation, the light shielding pattern moves up and down on the windshield according to the sudden acceleration / deceleration of the vehicle. However, it is possible to prevent the driver from noticing the movement of the light shielding pattern and distracting the driver's attention by the light shielding pattern.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a state of a vehicle equipped with a vehicle anti-glare device according to an embodiment of the present invention, and FIG. 2 shows a block configuration of the vehicle anti-glare device according to the embodiment of the present invention. FIG. 1 and 2, reference numeral 100 denotes a vehicle, 200 denotes an ECU (control processing unit), 210 denotes a light source position detection unit, 220 denotes an eyeball position detection unit, and 400 denotes a light shielding pattern display unit.

  In the present embodiment, the driver seat of the vehicle 100 will be described on the right side of the vehicle 100, but the present invention is not limited to such a driver seat layout.

  The light source position detection unit 210 detects the position (the direction and altitude of the sun) of a light source such as the sun that causes the driver to dazzle while taking an image of the front of the vehicle 100. In place of such a light source position detection unit 210, detection means for acquiring information such as the current position, traveling direction, and current time of the vehicle 100 is provided, and the position of the sun (the direction of the sun) is obtained from these information. In addition, the present invention can be realized by providing a configuration for calculating (and altitude).

  In this embodiment, the eyeball position detection unit 220 obtains image data of the driver at the driver's seat in the vehicle 100, for example, an image imaging unit such as a CCD camera, and the position of the eyeball of the driver by analyzing the image imaging unit. And an image recognizing unit for recognizing the eyeball, and enables the eyeball position of the driver to be detected.

  The ECU (control processing unit) 200 is an electronic control unit, and is a general-purpose information processing mechanism including a CPU, a ROM that holds a program that operates on the CPU, and a RAM that is a work area of the CPU. The ECU (control processing unit) 200 receives detection signals from the light source position detection unit 210 and the eyeball position detection unit 220, executes calculation based on a predetermined program, and controls the light shielding pattern display unit 400. The ECU (control processing unit) 200 may also serve as another control in the vehicle 100.

  The light shielding pattern display unit 400 is composed of a light control sheet provided on the entire surface of the windshield of the vehicle 100. This light control sheet is a film-like panel that changes its light transmittance in accordance with an applied voltage, and is provided on the entire inner surface of the windshield of the vehicle 100. Such a light control sheet can be realized by roughly enclosing two transparent electrodes and a liquid crystal material or an electrochromic material between the two transparent electrodes.

  The light control sheet always maintains a transparent state (light transmittance: high), and becomes opaque (light transmittance: low) when a voltage is applied by a light control sheet driving circuit (not shown). That is, the light control sheet changes from a transparent state (non-light-blocking state) to an opaque state, thereby forming a light-blocking state that blocks direct sunlight.

  In addition, the light control sheet constituting the light shielding pattern display unit 400 can be driven to apply or not apply a voltage for each divided section, and a transparent / opaque state of a required pattern shape. Can be changed.

  Next, drive control of the vehicle antiglare device configured as described above will be described. FIG. 3 is a flowchart showing a control process of the vehicle anti-glare device according to the embodiment of the present invention. Such a flow of control processing is executed at sufficiently short intervals.

  In FIG. 3, when the control process of the vehicle anti-glare device is started in step S <b> 100, the process proceeds to step 101, and the light source position detection unit 210 captures an image in front of the vehicle 100.

  In the subsequent step S102, it is determined whether or not there is a light source that impedes the driving of the vehicle 100 driver. When the result of determination in step S102 is YES, the process proceeds to step S103, and when the result of determination in step S102 is NO, the process proceeds to step S108.

  In step S103, the light source position detection unit 210 is used to detect the position of the light source.

  In step S104, an image of the driver's face is captured by the image capturing unit of the eyeball position detection unit 220, and in step S105, the position of the driver's eyeball is detected by the image recognition unit of the eyeball position detection unit 220.

  Next, in step S106, the light shielding pattern displayed on the light shielding pattern display unit 400 on the windshield based on the position of the light source obtained in step S103 and the position of the eyeball of the driver obtained in step S105. The position and pattern shape are calculated.

  A specific method for calculating the position and pattern shape of the light shielding pattern in step S106 will be described. FIG. 4 is a view for explaining a calculation method of the position and pattern shape of the light shielding pattern in the vehicle anti-glare device according to the embodiment of the present invention, and FIG. 5 is a view of the windshield portion of the vehicle 100 as viewed from the front outside the vehicle. It is.

  As shown in FIGS. 4 and 5, the ECU (control processing unit) 200 obtains a straight line OA connecting the acquired light source position O and one eyeball position A of the driver, and further, the straight line OA and the straight line OA Find the intersection A 'with the windshield.

  Further, the ECU (control processing unit) 200 obtains a straight line OB connecting the acquired light source position O and the other eyeball position B of the driver, and further, an intersection B between the straight line OB and the windshield surface. Ask for '.

  A curve C-C 'in the windshield plane connecting the intersection A' and the intersection B 'obtained as described above is obtained. For the curve C-C ', first, a straight line C-C' connecting the intersection A 'and the intersection B' is calculated. The windshield of an automobile is mostly curved due to its design, and an automobile adopting a straight windshield is rare. The curvature of the curved portion for each vehicle type is stored in a storage means such as a memory, and the calculated straight line C-C 'is corrected by the curvature read from the storage means. Of course, the following processing can be performed in the same manner as the curve C-C 'on the straight line C-C' without correction.

  In the present invention, the light-shielding pattern P is positioned at a position including the curve CC ′ (or the straight line CC ′) as described above, and the curve CC ′ has a slit shape with a predetermined width just passing through the center. The shape of the light shielding pattern P is assumed. The light shielding pattern P is provided so that the windshield covers the entire surface in the horizontal direction.

  According to the above configuration, the light shielding pattern P is displayed on the entire horizontal surface of the windshield with a slit shape having a predetermined width, and the light shielding pattern P exceeds the human viewing angle. It is possible to prevent the driver from distracting attention because it does not appear blurred. Then, it is possible to solve the problem that the driver pays attention to the light shielding pattern P, and the grasp of the situation in front of the vehicle is neglected.

  According to the calculation method of the position and pattern shape of the light shielding pattern as described above, the light shielding pattern P is also displayed so as to be tilted when the driver is tilting the face. FIG. 6 and FIG. 7 show such a situation. FIG. 6 is a diagram for explaining the calculation method of the position and pattern shape of the light shielding pattern in a state where the driver's face is tilted, and FIG. 7 is a view of the windshield portion of the vehicle 100 at this time as viewed from the front outside the vehicle. . Hereinafter, the process returns to the flowchart again.

  In step S107, the light control sheet drive circuit of the light shielding pattern display unit 400 is driven to change the calculated position / pattern shape section to an opaque state and display the light shielding pattern on the windshield.

  In step S109, the control process flow of the vehicle anti-glare device is terminated.

  In step S108, which proceeds when the result of the determination in step S102 is NO, the light shielding pattern in the light shielding pattern display unit 400 is erased, and the process proceeds to step S109 to end the process.

  Next, another embodiment of the present invention will be described. FIG. 8 is a diagram showing a block configuration of an antiglare device for a vehicle according to another embodiment of the present invention. The state of the vehicle equipped with the vehicle anti-glare device according to another embodiment is the same as that shown in FIG.

  In the description of the other embodiments, a vehicle speed detection unit 230 that detects the vehicle speed of the vehicle 100 is further provided in the previous embodiment, and a signal detected by the vehicle speed detection unit 230 is an ECU (control processing unit). 200 is input. In order to calculate the position / shape of the light shielding pattern P, the vehicle speed of the vehicle 100 is taken into account.

  A method for calculating the position and shape of the light shielding pattern P in another embodiment will be described. FIG. 9 is a diagram for explaining a method of calculating the position and pattern shape of a light shielding pattern in a vehicle antiglare device according to another embodiment of the present invention.

  Also in other embodiments, as shown in FIG. 9, the ECU (control processing unit) 200 obtains a straight line OA connecting the acquired light source position O and one eyeball position A of the driver, and further, this straight line O Find the intersection A 'between -A and the windshield surface.

  Further, the ECU (control processing unit) 200 obtains a straight line OB connecting the acquired light source position O and the other eyeball position B of the driver, and further, an intersection B between the straight line OB and the windshield surface. Ask for '.

  A curve C-C 'in the windshield plane connecting the intersection A' and the intersection B 'obtained as described above is obtained. The light shielding pattern P is positioned at a position including the straight line C-C ′, and the shape of the light shielding pattern P is a slit shape having a predetermined width through which the curve C-C ′ passes the center.

In another embodiment, when the vehicle speed is lower than a predetermined speed, the light shielding pattern P is provided so that the windshield extends horizontally, and when the vehicle speed exceeds the predetermined speed, the light shielding pattern P is shielded according to the vehicle speed. More specifically, when the vehicle speed exceeds a predetermined speed, as shown in FIG. 9, a seat on the side that is not a driver seat (an assistant) The length of the light shielding pattern P in the horizontal direction is shortened so that the light shielding pattern P is not applied to the windshield in front of the seat. Furthermore, control is performed so that the horizontal length of the light shielding pattern P is shortened as the vehicle speed becomes faster than the predetermined speed.

  Even if the horizontal length of the light shielding pattern P is shortened according to the vehicle speed, the driver's viewing angle becomes narrower as the vehicle speed becomes faster. It can suppress that P distracts the driver's attention. Then, it is possible to solve the problem that the driver pays attention to the light shielding pattern P, and the grasp of the situation in front of the vehicle is neglected. Further, when the vehicle speed is high, the light shielding pattern P is not applied to the windshield in front of the non-driver's seat (passenger seat). I don't feel it.

  Next, another embodiment of the present invention will be described. This embodiment can be applied to both the embodiment described first and the embodiment described next. In any of the previous embodiments, the light shielding pattern P is uniformly in an opaque state, but in the present embodiment, gradation is brought about in the opaque state of the light shielding pattern P. FIG. 10 is a view showing a state of a vehicle equipped with a vehicle anti-glare device according to another embodiment of the present invention.

  In the present embodiment, the density of the opaque state of the light shielding pattern P is increased at a portion near the curve CC ′ in the windshield surface, and the density of the opaque state is decreased as the distance from the curve CC ′ increases in the vertical direction. ing. According to the light-shielding pattern P having such gradation, even if the light-shielding pattern P moves up and down on the windshield in response to sudden acceleration or deceleration of the vehicle 100, the driver is less likely to notice the movement of the light-shielding pattern P. It is possible to prevent the driver's attention from being distracted by the pattern P.

It is a figure which shows the mode of the vehicle carrying the anti-glare apparatus for vehicles which concerns on embodiment of this invention. It is a figure which shows the block configuration of the glare-proof apparatus for vehicles which concerns on embodiment of this invention. It is a figure which shows the flowchart of the control processing of the anti-glare apparatus for vehicles which concerns on embodiment of this invention. It is a figure explaining the calculation method of the position and pattern shape of the light-shielding pattern in the glare-proof device for vehicles which concerns on embodiment of this invention. FIG. 2 is a view of a windshield portion of a vehicle 100 as viewed from the front outside the vehicle. It is a figure explaining the calculation method of the position and pattern shape of the light-shielding pattern in the glare-proof device for vehicles which concerns on embodiment of this invention. FIG. 2 is a view of a windshield portion of a vehicle 100 as viewed from the front outside the vehicle. It is a figure which shows the block structure of the glare-proof apparatus for vehicles which concerns on other embodiment of this invention. It is a figure explaining the calculation method of the position and pattern shape of the light-shielding pattern in the anti-glare apparatus for vehicles which concerns on other embodiment of this invention. It is a figure which shows the mode of the vehicle carrying the anti-glare apparatus for vehicles which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Vehicle, 200 ... ECU (control processing part), 210 ... Light source position detection part, 220 ... Eyeball position detection part, 230 ... Vehicle speed detection part, 400 ... Light-shielding pattern display Part

Claims (3)

An anti-glare device for a vehicle that blocks direct light from a light source incident from a windshield of the vehicle,
A light-shielding pattern display unit that shields direct light from the light source by providing a predetermined region in an opaque state provided on the windshield surface;
A light source position detector for detecting the position of the light source;
An eyeball position detector that detects two eyeball positions of the driver of the vehicle;
A control processing unit that receives the detection signal from the light source position detection unit and the eyeball position detection unit and controls the light shielding pattern display unit,
A first intersection that is the intersection of the first straight line connecting the light source position and one eyeball position and the windshield surface, and an intersection of the second straight line connecting the light source position and the other eyeball position and the windshield surface And a third straight line connecting the first intersection and the second intersection in the windshield plane,
An anti-glare device for a vehicle, characterized by being controlled to display a light shielding pattern on the entire horizontal surface of the windshield in a slit shape having a predetermined width including the third straight line. An anti-glare device for a vehicle that blocks direct light from a light source incident from a windshield of the vehicle,
A light-shielding pattern display unit that shields direct light from the light source by providing a predetermined region in an opaque state provided on the windshield surface;
A light source position detector for detecting the position of the light source;
An eyeball position detector that detects two eyeball positions of the driver of the vehicle;
A vehicle speed detector for detecting the vehicle speed;
A control processing unit that receives the detection signal from the light source position detection unit, the eyeball position detection unit, and the vehicle speed detection unit and controls the light shielding pattern display unit;
A first intersection that is the intersection of the first straight line connecting the light source position and one eyeball position and the windshield surface, and an intersection of the second straight line connecting the light source position and the other eyeball position and the windshield surface And a third straight line connecting the first intersection and the second intersection in the windshield plane,
A light-shielding pattern is displayed in the horizontal direction of the windshield with a slit shape having a predetermined width including the third straight line, and the length of the light-shielding pattern in the horizontal direction is controlled according to the vehicle speed. Anti-glare device for vehicles. 4. The vehicle antiglare device according to claim 1, wherein the density of the light shielding pattern decreases as the distance from the third straight line increases in the vertical direction. 5.

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