JP4362991B2 - In-vehicle display anti-glare mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anti-glare mechanism for a display mounted on a vehicle.
[0002]
[Prior art]
Some vehicles are equipped with a display device that displays image information, character information, etc., or some are installed after the vehicle is purchased. Some display devices mounted on a vehicle can change the angle of the display surface in the vertical direction (tilt direction) or the horizontal direction. In this type of display device, the electric type is generally provided with a drive mechanism for performing a tilting operation and a lateral movement, and an operation switch thereof, and is displayed by an occupant appropriately operating the switch. The angle of the surface can be changed.
In the utility model registration No. 2506020, a line-shaped optical sensor is arranged in the display device, and the direction of the extraneous light incident on the vehicle interior is detected from the output distribution (light quantity difference) of the sensor, and according to the incident direction. There has been proposed a display device in which the angle of the display surface of the display device is automatically changed so that the reflected light reflected by the display surface does not enter the occupant's field of view.
[0003]
[Problems to be solved by the invention]
In the utility model registration No. 2506020, the optical sensor arranged in a line is used to know the direction of the extraneous light incident on the vehicle, so the error of the sensor output becomes the error of the incident direction as it is, and the movement angle of the display surface Deviation tends to occur. Further, since the output distribution from the line-shaped optical sensor is determined, the control system becomes complicated.
It is an object of the present invention to provide an in-vehicle display anti-glare mechanism that detects the direction of incident light that enters a vehicle with a simple configuration and that can display the display surface satisfactorily regardless of the direction of incident light entering the vehicle interior. And
[0004]
[Means for Solving the Problems]
The in-vehicle display anti-glare mechanism according to the present invention detects a sun light on the display surface provided in the display device, a drive mechanism that can change the angle of the display surface of the display device provided in the vehicle interior in the tilt direction and the left-right direction, respectively. Display surface solar radiation detection means, calculation means for calculating the incident direction of solar radiation into the passenger compartment and solar altitude, and calculation means when the detected value of the display surface solar radiation detection means exceeds a threshold, An anti-glare control unit that obtains the incident direction and controls the operation of the drive mechanism until the detected value becomes lower than the threshold value based on the result is provided. For this reason, the angle of the display surface of the display device is changed by the drive mechanism until the detection value of the display surface solar radiation detection means becomes lower than the threshold value.
[0005]
In the anti-glare control unit , when the solar altitude obtained by the calculating means is not within a predetermined range where the solar radiation hits the display surface, the operation of the drive mechanism is controlled to return the angle of the display surface to the initial position . If the solar altitude is not within the predetermined range, there is no need to change the angle of the display surface to prevent glare, so that it is possible to return to the initial position adjusted to a position that is easy for the occupant to see without being exposed to sunlight.
[0006]
The vehicle-mounted display anti-glare mechanism according to the present invention has a weather detection solar detection means for detecting solar radiation in the vehicle interior, and the anti-glare control unit has a detection value of the weather detection solar detection means equal to or less than a threshold value. Until the predetermined time elapses, the angle of the display surface changed by the operation of the drive mechanism is maintained. For this reason, when the amount of solar radiation changes temporarily, the changed angle of the display surface is held.
[0007]
As another aspect of the present invention, when it has weather detection solar detection means for detecting solar radiation into the passenger compartment, if the detection value of the weather detection solar detection means is below a threshold value, You may comprise so that a drive mechanism may be controlled by a glare control part and the angle of a display surface may be returned to an initial position.
When the detection value of the display surface solar radiation detection means exceeds the threshold value, the calculation means obtains the solar altitude and the incident direction of solar radiation, and based on the result, the drive mechanism is controlled so that the detection value is lower than the threshold value. When the maximum movable angle is reached, the operation of the drive mechanism is stopped by the anti-glare control unit. By controlling in this way, the display surface does not move beyond the maximum movable angle.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, the in-vehicle display anti-glare mechanism is a display surface solar radiation detection unit that detects solar radiation on the display surface 2 a of the display device 1 provided in the vehicle interior 50 and the liquid crystal screen 2 provided in the display device 1. The first solar radiation sensor 3, the calculation means 4 for calculating the incident direction of solar radiation into the passenger compartment 50 and the solar altitude, the antiglare control unit 5, and the drive mechanisms 19 and 20 shown in FIG.
[0009]
The display device 1 is disposed in the center of an instrument panel 7 provided in front of the driver's seat 10 in the passenger compartment 50. In the upper part of the instrument panel 7, a second solar radiation sensor 6 is arranged in the vicinity of the windshield 9 as weather detection solar radiation detecting means for detecting solar radiation in the vehicle interior 50. Reference numeral 11 indicates an occupant 11 sitting in the driver's seat, and reference numeral 12 indicates an occupant's line of sight. Reference numeral 14 denotes a side window on the passenger seat 13 side, and reference numeral 15 denotes a side window on the driver's seat 10 side.
[0010]
As shown in FIG. 2, the liquid crystal screen 2 is provided inside a frame-like frame 16 so that the display surface 2 a is positioned on the passenger side. As shown in FIG. 3, the liquid crystal screen 2 is rotatably supported by pins 21 and 21 disposed on the axis A at the center of the upper side 16 a and the lower side 16 b of the frame 16, and its angle in the left-right direction R is Can be changed. A gear is formed on a part of the pin 21 supported by the lower side 16b. Each pin is supported by bearings 22 and 22 provided on the upper side 16a and the lower side 16b.
[0011]
The drive mechanism 19 changes the angle of the display surface 2a of the display device 1 in the left-right direction (hereinafter referred to as “left-right direction R”) indicated by an arrow R. The drive mechanism 19 includes a rack (not shown) that meshes with the gear of the pin 21 and a drive motor 18 that drives the rack. In this embodiment, a stepping motor is adopted as the drive motor 18. Therefore, the angle θ of the display surface 2 a can be detected from the number of steps of the stepping motor 18.
[0012]
As shown in FIG. 4, elongated holes 40 extending in the vertical direction are respectively formed in the side edges 16 c and 16 d of the frame 16, and the arms 25 and 25 are respectively attached via the elongated holes 40 ( FIG. 4 shows one side). One end 25 a of each arm 25 is swingably supported by a side wall 32 in a space 30 formed in the instrument panel 7. The other end 25b of each arm 25 is pin-coupled to the sides 16c and 16d on the axis B shown in FIG. The frame 16 is supported by the arms 25 and 25 so that the axis B can swing in the tilt direction Q.
[0013]
The drive mechanism 20 changes the angle of the display surface 2a of the display device 1 in a tilt direction indicated by an arrow Q (hereinafter referred to as “tilt direction Q”). As shown in FIG. 5, the drive mechanism 20 includes a drive motor 17 that rotates the pinion gear 23 and a rack 24 that meshes with the pinion gear 23. The rack 24 extends in the front-rear direction S of the vehicle, and one end 24 a is pin-coupled to the lower side 16 b of the frame 16 and is slidably attached to the bottom 31 of the space 30. In this embodiment, a stepping motor is adopted as the drive motor 17. For this reason, the display surface 2a of the liquid crystal screen 2 attached to the frame 16 is moved in the tilt direction Q around the axis B by the drive motor 17 being driven and the rack moving in the front-rear direction S in FIG. The angle can be changed. Therefore, the angle θ1 of the display surface 2a can be detected from the number of steps of the stepping motor 17.
[0014]
As shown in FIG. 2, the calculation means 4, a well-known micro-computers, GPS antenna, not shown with the first solar sensor 3 and the second solar radiation sensor 6 is connected. GPS antenna is the one used in the known navigation system, is intended for receiving information from the population satellites. The first solar sensor 3, information detected by the second solar sensor 6, GPS antenna is transmitted to the calculation unit 4. In this embodiment, the latitude and via the degree of the vehicle position information, receiving the traveling direction information and time information for vehicle or the like. The calculation means 4 calculates the solar altitude and the incident direction of sunlight irradiated into the vehicle interior based on these pieces of information. As the calculation means 4, a so-called car navigation system computer may be used.
[0015]
The anti-glare control unit 5 mainly controls driving of the drive motors 17 and 18. As shown in FIG. 2, the antiglare control unit 5 is connected to the calculation means 4, the drive motors 17 and 18, and the timer 33 by wiring. The anti-glare control unit 5 has a memory (not shown). In this memory, the threshold Ith used for comparison with the detection value P, which is the detection value of the first solar radiation sensor 3, and the number of steps of the drive motors 17 and 18 are stored. The angle information of the corresponding display surface 2a, the maximum movable angle θmax in the horizontal direction of the display surface 2a, the maximum movable angle θ1max in the tilt direction, the predetermined value M used for comparison with the detection value P1 of the second solar radiation sensor 6, the sun A predetermined time T used for comparison with the predetermined altitudes h1 and h2 of the altitude and the output time T of the detection value P1 of the second solar radiation sensor 6 is set in advance.
[0016]
The threshold value Ith is for identifying whether the light shining on the display surface 2a is sunlight (sunlight) or indoor light, and is specifically set to a certain predetermined light amount value. The maximum movable angles θmax and θ1max are ranges in which the display surface 2a can be satisfactorily seen from the occupant 11 sitting in the driver's seat 10. This means
When not in use, the display device 1 according to the present embodiment is stored in a state of being collapsed in the space 30 shown in FIGS. 4 and 5, and when in use, the display device 1 jumps out of the space 30 and the first solar radiation sensor 3 is positioned below. The in-dash system occupies a standing state. In this embodiment, the initial position of the display surface 2a (display device 1) refers to an upright state. When controlling the operation of the drive motors 17 and 18 separately from the control by the anti-glare control unit 5, an operation switch that can directly drive / stop the drive motors 17 and 18 may be provided. In this case, the occupant 11 operates these operation switches to adjust the display surface 2a from the standing state to his / her favorite angle, and the adjusted position may be set as the initial position.
[0017]
The control operation by the anti-glare control unit 5 having such a configuration will be described based on the flowchart shown in FIG. This control operation starts when a switch (not shown) is operated and the display device 1 occupies the standing state from the housed state as shown in FIG.
In step D1 of FIG. 6, the state of the anti-glare control flag is determined. If the flag is off, the process proceeds to step D2, and the angle information θ1 of the display surface 2a in the left-right direction R and the angle information θ1 in the tilt direction Q are obtained. Read and go to step D3. In step D3, the detected value P of the first solar radiation sensor 3 is compared with the threshold value Ith. If the detection value P does not exceed the threshold value Ith, it is assumed that the solar radiation is not shining on the display surface 2a, and the process returns to step D1 to establish a monitoring system.
[0018]
When the detection value P exceeds the threshold value Ith in step D 3, as solar radiation on the display surface 2a is standing irradiation, the process proceeds to step D4, the vehicle position received by the GPS antenna, the traveling direction, reads the information of the date and time . In step D5, the incident direction of the solar altitude and solar radiation on the display surface 2a is calculated from the information read in step D4, and the incident direction is determined in step D6. If the incident direction is from the side window 14 or the side window 15 in step D6, it is determined in step D7 whether or not the current angle information θ has reached the maximum movable angle θmax in the left-right direction R, and rear glass or sunroof etc. If so, the process proceeds to step D9.
[0019]
If the current angle information θ does not reach the maximum movable angle θmax in step D7, the process proceeds to step D8, the drive motor 18 is driven, the angle of the display surface 2a in the left-right direction R is changed, and the process proceeds to step D11. In step D11, the detection value P of the first solar radiation sensor 3 after the change is compared with the threshold value Ith, and if the detection value P is lower than the threshold value Ith, there is no solar radiation on the display surface 2a due to the angle change. As a result, the process proceeds to step D12.
[0020]
In step D9, it is determined whether or not the current angle information θ1 has reached the maximum movable angle θ1max in the tilt direction Q. If the angle information θ1 does not reach the maximum movable angle θ1max, the process proceeds to step D10, the drive motor 17 is driven, the angle of the display surface 2a in the tilt direction Q is changed, and the process proceeds to step D11. In step D11, the detection value P of the first solar radiation sensor 3 after the change is compared with the threshold value Ith, and if the detection value P is lower than the threshold value Ith, there is no solar radiation on the display surface 2a due to the angle change. As a result, the process proceeds to step D12.
[0021]
If the detected value P is not lower than the threshold value Ith in step D11, it is assumed that the solar radiation is still shining on the display surface 2a, and the process returns to step D4 to continue the angle control of the display surface 2a. In step D9, if the current angle information θ1 has reached the maximum movable angle θ1max, it is impossible to change the angle in the tilt direction Q, so the process proceeds to step D12. In step D12, driving of the driving motor 17 or the driving motor 18 being driven is stopped, the anti-glare control flag is turned on, and the process returns to step D1.
[0022]
When the process returns from step D12 to step D1 and the anti-glare control flag is turned on, the process proceeds to step D13. In step D13, the flow proceeds vehicle position received by the GPS antenna, the traveling direction, reads the information of the date and time, to step D15 to calculate the incident direction of the display surface 2a of the solar altitude and insolation from the read information in step D14 .
[0023]
In Step D15, it is determined whether or not the calculated solar altitude is within a predetermined range of h1 to h2, and if it is not within the predetermined range, the solar altitude is such that the display surface 2a is not exposed to solar radiation. If there is, the process proceeds to step D19. In step T19, each drive motor is driven until the display surface 2a reaches the initial position, the anti-glare control flag is turned off, and this control is finished. When the solar altitude is within the predetermined range, the process proceeds to step D16, and the detection value P1 from the second solar radiation sensor 6 is determined. Here, if the detected value P1 exceeds the set value M, it returns to Step D1 assuming that there is sufficient solar radiation in the vehicle interior 50. If the detected value P1 does not exceed the set value M, the process proceeds to step D17, where the low output state time T of the detected value P1 is counted, and the process proceeds to step D18.
[0024]
In step D18, it is determined whether or not the low output state time T of the detection value P1 has reached a predetermined time T1, and if the predetermined time T1 has not elapsed, that is, if it is within the time limit, the process returns to step D16. If the time T has passed the predetermined time T1 (time limit), it is assumed that the vehicle is in a state where direct sunlight such as a tunnel, underground, or shadow of a building does not enter, or that the sun has burnt temporarily. Proceed to In step D19, each drive motor is driven until the display surface 2a reaches the initial position, the anti-glare control flag is turned off, and this control is terminated.
[0025]
In this way, the direction of solar radiation and solar altitude entering the vehicle are not calculated from the output from the optical sensor, but are calculated based on the data transmitted from the satellite, so the incident direction of solar radiation and the solar altitude are accurately calculated. be able to. The drive motors 17 and 18 are driven to change the angle of the display surface 2a until the detection value P from the first solar radiation sensor 3 falls below the threshold value Ith. For this reason, since the direction of the display surface 2a changes until the solar radiation with respect to the display surface 2a disappears, even if the incident direction changes as the vehicle moves, the occupant 11 can see the display surface 2a well. In this embodiment, since the solar radiation with respect to the display surface 2a is determined using one first solar radiation sensor 3 without using a line-shaped optical sensor for the display device 1, the configuration of the control system can be simplified.
[0026]
When the detection value P from the first solar radiation sensor 3 falls below the threshold value Ith, the drive motors 17 and 18 stop driving, so that the angle change of the display surface 2a is not excessively performed with respect to the sight line 12 of the occupant. Furthermore, when the maximum movable angles θ1 and θ2 are exceeded during the change of the angle of the display surface 2a, the drive motors 17 and 18 are stopped, so that excessive movement is prevented, and the drive mechanisms 19 and 20 and the entire apparatus are Durability is improved. When the solar altitude is not within the predetermined range, the display surface 2a is returned to the initial position on the assumption that the solar display surface 2a does not shine, so that the display surface 2a can be viewed at an optimal position before anti-glare control. When the time T during which the detection value P2 of the second solar radiation sensor 6 decreases is within the predetermined time T1, for example, in the case of a temporary solar radiation blocking state such as temporarily entering a shadow of a building or a tunnel, the display surface 2a Does not return to the initial position, and the anti-glare control is continued, so that the changed angle of the display surface 2a is maintained, and the angle change of the sensitive display surface 2a is suppressed, so that the visibility is improved.
[0027]
The display device 1 according to the present invention is not limited to the in-dash system described above, but may be of a type installed on the instrument panel 7 or along the outer surface of the instrument panel 7. In this manner, the display surface 2a may be provided.
[0028]
In this embodiment, consideration is given to the visibility of the display surface 2a when the occupant 10 sits on the driver's seat 11 and looks at the display surface 2a of the display device 1, but the display device 1 sits on the rear seat of the vehicle, for example. Of course, it can also be applied to passengers. In this case, the display device 1 may be in the above-described form arranged on the instrument panel 7, a form provided in the seat back of the driver's seat 10 or the passenger seat 11, and a form arranged in the center control for the rear seat. Alternatively, it may be suspended from the ceiling of the vehicle interior 50. That is, the present invention does not limit the position where the occupant views the display surface 2a or the location of the display device 1.
[0029]
In this embodiment, the maximum movable angles θmax and θ1max are set in a range in which the display surface 2a can be satisfactorily seen from the occupant 11 sitting in the driver's seat 10, but the display surface 2a is also assumed to be a case where the position of the occupant is other than the driver's 10. Therefore, in such a case, the display surface 2a may be in a range where the display surface 2a can be satisfactorily seen from the occupant who is the target of viewing the display surface 2a.
[0030]
【The invention's effect】
According to the present invention, since the angle of the display surface of the display device is changed by the drive mechanism until the detection value of the display surface solar radiation detection means becomes lower than the threshold value, the direction of incident light entering the vehicle is detected with a simple configuration. Thus, the display surface of the display device can be seen well regardless of the incident direction of the incident light into the vehicle interior. Also, until the detection value of the weather detection means for detecting the weather exceeds a predetermined time, the angle of the display surface changed by the operation of the drive mechanism is maintained, so even if the amount of solar radiation changes temporarily, it is changed. Thus, the angle of the display surface is maintained, and the change in the angle of the sensitive display surface is suppressed, so that the visibility can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic view of a vehicle interior having an on-vehicle display anti-glare mechanism.
FIG. 2 is a diagram showing a schematic configuration of an in-vehicle display anti-glare mechanism.
FIG. 3 is a vertical cross-sectional view of a display device showing a configuration of a left-right drive mechanism.
FIG. 4 is a side view showing a support state of the display device.
FIG. 5 is a longitudinal sectional view of a display device showing a configuration of a drive mechanism for tilting.
FIG. 6 is a flowchart showing an example of anti-glare control.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Display apparatus 2a Display surface 3 Display surface solar radiation detection means 4 Calculation means 5 Anti-glare control part 6 Weather detection solar radiation detection means 19 and 20 Drive mechanism 50 Car interior Ith Threshold P Detection value Q of display surface solar radiation detection means Q Tilt direction R Left and right directions θ, θ1 Display surface angles h1 to h2 Predetermined range T1 Predetermined time

Claims (2)

A display device provided in the passenger compartment;
A drive mechanism for varying the angle of the display surface of the display device in a tilt direction and a left-right direction,
Display surface solar radiation detecting means provided in the display device for detecting solar radiation on the display surface;
A calculation means for calculating an incident direction of solar radiation into the vehicle interior and a solar altitude;
Having a solar radiation detecting means for detecting weather for detecting solar radiation into the vehicle interior;
When the detection value of the display surface solar radiation detection means 3 exceeds a threshold value, the calculation means obtains the solar altitude and the incident direction of solar radiation, and based on the result, the drive mechanism of the drive mechanism until the detection value becomes lower than the threshold value. Anti-glare control that controls the operation and maintains the angle of the display surface changed by the operation of the drive mechanism until the detection value of the solar radiation detection means 6 for detecting the weather is not more than a threshold value exceeds a predetermined time. And a vehicle-mounted display anti-glare mechanism. In-vehicle display anti-glare mechanism according to claim 1,
The anti-glare control unit controls the operation of the drive mechanism to return the angle of the display surface to the initial position when the solar altitude obtained by the calculating means is not within a predetermined range. Dazzle mechanism.

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