JP2015093648A - Display device and display screen driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that automatically adjusts the angle of a display such that visibility for a rear seat occupant can always be ensured taking account of a case where a vehicle itself inclines to the horizontal surface of the earth, and to provide a display screen driving device.SOLUTION: A display device 10 comprises: a display part 16 that is attached to a front seat arranged in forward and backward directions of a vehicle so as to be viewable by a viewer in a rear seat; a driving part 14 that adjusts the inclination angle of the display part 16; a front seat inclination acquiring part 11 that acquires the inclination angle of the front seat; a vehicle inclination acquiring part 12 that acquires the inclination angle of the vehicle; and a drive control part 13 that instructs the driving part 14 to adjusts the angle of the display part 16 on the basis of the inclination angle of the front seat, acquired by the front seat inclination acquiring part 11, and the inclination angle of the vehicle, acquired by the vehicle inclination acquiring part 12. Thereby, visibility for a rear seat occupant can always be ensured.

Description

  The present invention relates to a display device and a front screen drive device that are provided on the back of a front seat of a seat disposed in front of or behind a vehicle such as an automobile, a ship, an airplane, or a train.

  Conventionally, in a vehicle such as an automobile or an airplane, a display device such as a liquid crystal panel has been arranged on the back of the front seat (the back of the headrest) so that the rear seat can enjoy images. There are known devices that can adjust the angle of the display so that a viewer of the seat can easily see the display.

  In this case, if the front seat is a reclining seat and the rear seat viewer changes the tilt of the front seat while the display is being used, the angle of the display as viewed from the rear seat viewer will change. Each time the tilt angle of the seat in the front seat changes, there is a problem that the viewer in the rear seat has to readjust the optimal display angle.

  In order to cope with such a problem, for example, in Patent Document 1, a display attached to the rear portion of the front seat is rotatably supported and driven by a motor, and the reclining seat of the front seat is inclined. An apparatus is described in which a motor is driven in accordance with a displaced angle to rotate a display so that the angle can be automatically adjusted.

JP 2007-253807 A

  However, in the conventional apparatus as shown in Patent Document 1, for example, the tilt angle of the front seat is an inclination with respect to the horizontal plane of the earth (or a vertical plane perpendicular to the horizontal plane). If the vehicle itself is tilted, or if it is an airplane that is rising or descending and the aircraft itself is tilted, that is, if the vehicle itself is tilted with respect to the earth's horizontal plane, Although there is no need to change, the angle of the display is automatically adjusted, which makes it difficult for the viewer in the rear seat to see.

  The present invention has been made to solve the above-described problems, and always considers the case where vehicles such as automobiles, ships, airplanes, and trains themselves are inclined with respect to the horizontal plane of the earth. It is an object of the present invention to provide a display device and a display screen driving device that automatically adjusts the angle of a display so as to ensure the visibility of an occupant.

  In order to achieve the above object, a display device according to the present invention includes a display unit that is attached to a front seat of a seat arranged back and forth in a vehicle so as to be visible to a viewer of a rear seat, and an inclination angle of the display unit. Acquired by a drive unit to be adjusted, a front seat inclination acquisition unit that acquires an inclination angle of the front seat with respect to a reference, a vehicle inclination acquisition unit that acquires an inclination angle of the vehicle with respect to the reference, and the front seat inclination acquisition unit A drive control unit that instructs the drive unit to adjust the angle of the display unit based on the inclination angle of the front seat and the vehicle inclination angle acquired by the vehicle inclination acquisition unit. It is characterized by that.

  According to the present invention, the angle of the display unit (display) is automatically adjusted in consideration of the case where the vehicle itself is tilted with respect to the horizontal surface of the earth. Even when it is tilted or when the angle changes when it hits the display unit (display), it is possible to always maintain a state in which the display unit (display) is easily visible to the viewer in the rear seat.

3 is a block diagram illustrating a configuration of a display device in Embodiment 1. FIG. It is a fragmentary perspective view which shows the state which attached the display apparatus to the back part of the headrest of a front seat. It is explanatory drawing which showed typically how the angle of the display part (display) at the time of defeating a front seat is adjusted. In the display apparatus shown in FIG. 3, it is explanatory drawing which showed typically the case where the vehicle body (vehicle) itself inclines. 4 is a flowchart illustrating an operation when the drive control unit of the display device in Embodiment 1 automatically adjusts the angle of the display unit (display). FIG. 10 is a block diagram illustrating configurations of a display screen driving device and a portable display device in a second embodiment. It is a fragmentary perspective view which shows the state which attached the portable display apparatus to the back part of the headrest of a front seat.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a display device according to Embodiment 1 of the present invention. The display device 10 includes a front seat inclination acquisition unit 11, a vehicle inclination acquisition unit 12, a drive control unit 13, a drive unit 14, a display control unit 15, and a display unit (display) 16, and includes automobiles, ships, airplanes, It is a device provided in the front seat (for example, the back of the front seat, etc.) of the seat arranged before and after a vehicle such as a train. In the first embodiment, it is assumed that the vehicle is used by being attached to the rear portion of the front seat, which is a reclining seat, in an automobile.

  The front seat inclination acquisition unit 11 is detected by the front seat inclination detection unit 1 such as an inclination sensor, a magnetic position sensor, and a geomagnetic sensor attached to a seat back (back) 20 (see FIG. 2) that is a reclining seat. The inclination angle of the front seat with respect to an arbitrary reference is acquired. The arbitrary reference is, for example, the earth's horizontal plane or a vertical plane perpendicular to the horizontal plane. In the first embodiment, an inclination angle with respect to the vertical plane perpendicular to the earth's horizontal plane is acquired.

  In addition, the front seat inclination detection part 1 should just be attached in the position which can detect the inclination of the seat of a front seat. For example, you may attach to the display part (display) 16 of the display apparatus 10. FIG.

  The vehicle inclination acquisition unit 12 detects a vehicle perpendicular to a horizontal plane of the earth detected by the vehicle inclination detection unit 2 such as an inclination sensor, a magnetic position sensor, and a geomagnetic sensor attached to the bottom surface of the vehicle such as an automobile. Get the angle of inclination of the vehicle itself relative to an arbitrary reference, how much it is inclined.

  Note that the vehicle inclination detection unit 2 may be attached to the bottom surface of the vehicle as shown in FIG. 4 described later, or when the vehicle already has a function of detecting the inclination of the vehicle itself. The information may be used. When the existing tilt detection function is used, it is cheaper and does not require attachment work.

  Based on the front seat inclination angle acquired by the front seat inclination acquisition section 11 and the vehicle inclination angle acquired by the vehicle inclination acquisition section 12, the drive control section 13 is provided on the display section (display) 16 of the display device 10. An instruction is given to the drive unit 14 such as a motor to adjust (displace) the angle.

  The drive unit 14 is, for example, a motor or the like, and receives an instruction from the drive control unit 13 and adjusts the inclination angle of the display unit (display) 16, that is, rotates the display unit (display) 16 to obtain a predetermined value. Tilt to an angle.

  The display control unit 15 controls what video is displayed on the display unit (display) 16. In addition, the display control unit 15 and the drive control unit 13 described above constitute a control unit 17 of the display device 10.

  The display unit (display) 16 is a display such as a liquid crystal panel, for example, and displays various images in response to an instruction from the display control unit 15, and in the front seat (for example, the back of the front seat). It is attached so as to be visible to the viewer of the rear seat and is rotated by the drive unit 14 so that the inclination angle is displaced.

  In addition, as a specific installation method of the display device 10, for example, as described in Patent Document 1, it may be installed in the same manner as in the past. For example, as shown in FIG. It is assumed that it is installed on the back portion of a headrest 21 that moves together with a seat back (back) 20 of a certain front seat.

  FIG. 2 is a partial perspective view showing a state in which the display device 10 is attached to the back of the headrest 21 in the front seat. The back portion of the headrest 21 is drawn out into a rectangular concave shape to form a concave portion 30. A rectangular display 16 is rotatably accommodated and supported in the recess 30, and the headrest 21 integrated with the seat back (backrest) 20 is displaced along with the angular displacement of the front seat. At the same time, the angle of the display unit (display) 16 is also displaced.

  The display unit (display) 16 is fixed to horizontal shafts 31 and 32 that protrude from the center in the vertical direction at the left and right ends, respectively. The shafts 31 and 32 are rotatably supported by bearings (not shown) provided on the inner wall portion of the recess 30, and the shafts 31 and 32 and the bearings can rotate the display unit (display) 16. I support it.

  A rotating shaft of a driving unit 14 such as a motor for driving a display unit (display) 16 is connected to the extension of the shaft 31. By driving the driving unit 14, the shafts 31 and 32 are used as rotation centers. The display unit (display) 16 can be rotated and stopped at an arbitrary rotation position. Note that the angle of the display unit (display) 16 can be manually adjusted, and even in this case, the display unit 16 can be stopped at an arbitrary rotation position.

FIG. 3 schematically shows how the angle of the display unit (display) 16 is adjusted when the front seat is tilted with respect to the display device 10 attached to the back of the headrest of the front seat. FIG.
FIG. 3A shows the initial position of the display unit (display) 16 at an angle that is easy to see for the rear seat viewer when the front seat is not tilted.

  FIG. 3B shows a case where the display unit 16 of the display device 10 attached to the back of the headrest of the front seat is in FIG. 3A when the front seat is tilted by α degrees. When the angle remains the same, the display screen is slightly turned down, and it is difficult to see from the viewer of the rear seat.

  FIG. 3 (c) shows that the angle of the display unit (display) 16 is set to α degrees (the same angle as the degree of sheet collapse) in order to eliminate the problem that it is difficult to see with the angle shown in FIG. 3 (b). FIG. 4 is a diagram showing that the display screen is adjusted so that the display screen can be viewed at an angle that is easy for the viewer of the rear seat to see, as in FIG.

FIG. 4 is an explanatory diagram schematically showing a case where the vehicle body (vehicle) 40 itself is inclined, such as when a vehicle such as an automobile is traveling on a slope, in the display device 10 shown in FIG.
FIG. 4A is a diagram showing a case where the vehicle body (vehicle) 40 itself is traveling in a position parallel to the horizontal plane of the earth, and FIG. 4B is a diagram where the vehicle body (vehicle) 40 itself is of the earth. It is a figure which shows the case where it is drive | working in the state inclined only (beta) degree with respect to the horizontal surface.

As shown in FIG. 4, an inclination sensor that detects how many times the vehicle body (vehicle) 40 is inclined with respect to the horizontal surface of the earth (this is assumed to be β degrees) on the bottom surface of the vehicle body (vehicle) 40. A vehicle inclination detector 2 such as a magnetic potential sensor and a geomagnetic sensor is installed.
Then, as shown in FIG. 4A, when β = 0, the angle of the display unit (display) 16 is visually recognized by the viewer of the rear seat as shown in FIG. It is adjusted to an easy angle.

  On the other hand, as shown in FIG. 4B, when the vehicle body (vehicle) 40 is inclined, such as when the vehicle body (vehicle) 40 is traveling on the ground inclined by β degrees, the conventional method is used. When the display screen is adjusted, the front seat inclination detection unit 1 detects an angular displacement of α degrees (= β degrees) even though the front seat 20 is not displaced from the state of FIG. Therefore, if an instruction is given to the drive unit 14 to rotate the display unit (display) 16 accordingly, the display screen is peeled down, making it difficult for the viewer in the rear seat to see.

  Therefore, in the present invention, the difference obtained by subtracting the displacement amount of the inclination angle from the initial position of the vehicle 40 itself from the displacement amount of the inclination angle of the front seat from the initial position when the vehicle such as an automobile starts traveling ( The angle of the display unit (display) 16 is displaced by (α−β) degrees so that the visibility of the backseat can always be ensured even when the vehicle 40 is inclined with respect to the horizontal plane of the earth. The angle of the display unit (display) 16 is automatically adjusted so that it can be performed.

FIG. 5 is a flowchart showing an operation when the drive control unit 13 of the display device 10 automatically adjusts the angle of the display unit (display) 16.
First, when the power of the display device 10 is turned on, the initial inclination angle α0 of the display unit (display) 16 adjusted to an angle that is easy for the viewer in the rear seat to see, and the initial inclination of the vehicle body (vehicle) 40. The angle β0 is acquired and stored (step ST1).

  Thereafter, the inclination angle α of the front seat and the inclination angle β of the vehicle body (vehicle) 40 are always obtained (at a constant cycle) (step ST2), and the displacement amount (α− If the difference between (α0) and the displacement (β−β0) of the tilt angle of the vehicle body (vehicle) 40 is zero (YES in step ST3), the process returns to step ST2 and the process is repeated.

  On the other hand, when the difference between the displacement amount (α−α0) of the front seat seat and the displacement angle (β−β0) of the vehicle body (vehicle) 40 is not zero (NO in step ST3). Instructs the drive unit 14 to rotate the tilt angle of the display unit (display) 16 by the difference “(α−α0) − (β−β0)”. The inclination angle is adjusted (step ST4).

  In this way, not only the inclination angle of the front seat, but also the inclination angle of the vehicle body (vehicle) 40 itself is acquired, and the display unit (display) 16 of the display device 10 is rotated based on the difference to obtain the inclination angle. By automatically adjusting the inclination angle, the inclination angle of the display unit (display) 16 is changed due to the inclination displacement of the road on which the vehicle travels, even when the vehicle starts to travel on a slope. It is possible to prevent the rear seat viewer from becoming difficult to see, and to automatically adjust the inclination angle of the display unit (display) 16 so that the rear seat viewer can easily see the rear seat. be able to.

  In the first embodiment, the display unit (display) 16 of the display device 10 is attached by forming the recess 3 in the back part of the headrest 21 integrated with the seat back (back) 20 of the front seat of the vehicle. However, as shown in Patent Document 1, for example, the rear portion of the seat back (back) 20 of the front seat may be pulled out into a rectangular concave shape to form the concave portion 3 and attached. Needless to say.

  As described above, according to the first embodiment, the angle of the display unit (display) is automatically adjusted in consideration of the case where the vehicle itself is inclined with respect to the horizontal plane of the earth. Even when the seat is reclining, when the vehicle is tilted, or when the angle changes when it hits the display (display), the display (display) is always easily visible to the viewer in the rear seat Can be held.

Embodiment 2. FIG.
FIG. 6 is a block diagram showing the configuration of the display screen driving device and the portable display device according to the second embodiment. In addition, the same code | symbol is attached | subjected to the structure similar to what was demonstrated in Embodiment 1, and the overlapping description is abbreviate | omitted.

  In the second embodiment described below, an inclination sensor, a magnetic potential sensor, and a geomagnetism are provided at the front seat (for example, the back of the front seat, etc.) of a seat arranged before and after a vehicle such as an automobile, a ship, an airplane, or a train. A display screen driving device 60 is formed so that a portable display device 50 including a tilt detection unit 51 such as a sensor and a display unit (display) 53 can be attached, and the portable display device 50 is removable. The device 60 includes a front seat inclination acquisition unit 61, a vehicle inclination acquisition unit 62, a drive control unit 63, a drive unit 64, and a display device attachment unit 65 (not shown in FIG. 6, see FIG. 7).

  That is, in the second embodiment, a portable display device 50 such as a smartphone is attached to the back of the seat (back) of the front seat, and the viewer of the back seat uses the display (display) 53 of the portable display device 50. As in the first embodiment, the inclination angle of the display unit (display) 53 is automatically adjusted so that the viewer in the rear seat can easily see the image.

  The tilt detection unit 51 is, for example, a tilt sensor, a magnetic potential sensor, a geomagnetic sensor, or the like, and detects the tilt angle of the portable display device 50 with respect to an arbitrary reference. Note that the arbitrary reference is, for example, the horizontal plane of the earth or a vertical plane perpendicular to the horizontal plane, as in the first embodiment, and the tilt detection unit 51 is a portable display for a vertical plane perpendicular to the horizontal plane of the earth. It is assumed that the inclination angle of the device 50 is detected.

The display control unit 52 controls what kind of video is displayed on the display unit (display) 53.
The display unit (display) 53 is a display such as a liquid crystal panel, for example, and displays various images in response to instructions from the display control unit 52.

  The portable display device 50 includes a display device mounting portion 65 (see FIG. 7) attached to the front seat (for example, the back of the front seat), and the display portion 53 is a viewer of the rear seat. It is attached so that it can be seen.

  The front seat inclination acquisition unit 61 includes an inclination detection unit 51 such as an inclination sensor, a magnetic potential sensor, and a geomagnetic sensor included in the portable display device 50 attached to the back of the seat back (back) 20 of the front seat which is a reclining seat. The inclination angle of the front seat with respect to an arbitrary reference detected by is acquired.

  The vehicle inclination acquisition unit 62 detects a vehicle perpendicular to a horizontal plane of the earth detected by the vehicle inclination detection unit 2 such as an inclination sensor, a magnetic position sensor, and a geomagnetic sensor attached to the bottom surface of the vehicle such as an automobile. Get the angle of inclination of the vehicle itself relative to an arbitrary reference, how much it is inclined.

  The drive control unit 63 displays the display unit 53 of the portable display device 50 based on the front seat inclination angle acquired by the front seat inclination acquisition unit 61 and the vehicle inclination angle acquired by the vehicle inclination acquisition unit 62. The drive unit 64 such as a motor is instructed to adjust (displace) the angle.

  The drive unit 64 is, for example, a motor, and adjusts the inclination angle of the display device mounting unit 65 (see FIG. 7) to which the portable display device 50 is mounted in response to an instruction from the drive control unit 63, that is, the display device. The attachment portion 65 is rotated to tilt the display portion (display) 53 of the portable display device 50 to a predetermined angle.

  The display device attachment portion 65 is attached to the front seat (for example, the back of the front seat), and is used to attach the portable display device 50 so that the display portion (display) 53 can be viewed by the viewer of the rear seat. is there. That is, the user (rear viewer) can attach his / her portable display device 50 such as his / her smartphone to the display device attachment portion 65 and can visually recognize the video on the display portion (display) 53.

  For example, as shown in FIG. 7, the display device attachment portion 65 is attached to the rear back portion of the headrest 21 that moves together with the front seat back (backrest) 20 that is a reclining seat. Shall be.

  FIG. 7 is a partial perspective view showing a state in which the display device attachment portion 65 is attached to the back of the headrest 21 of the front seat, and the portable display device 50 is attached to the display device attachment portion 65. The back portion of the headrest 21 is drawn out into a rectangular concave shape to form a concave portion 30. A display device mounting portion 65 to which a rectangular portable display device 50 having an inclination detecting portion 51 and a display portion (display) 53 can be attached and detached is rotatably stored and supported in the recess 30. Along with the angular displacement, the headrest 21 integrated with the seat back (backrest) 20 is also displaced, and at the same time, the angle of the display device mounting portion 65 is also displaced.

  The display device mounting portion 65 is fixed to the horizontal shafts 31 and 32 protruding from the central portion in the vertical direction at the left and right ends, respectively. The shafts 31 and 32 are rotatably supported by bearings (not shown) provided on the inner wall portion of the recess 30 so that the shafts 31 and 32 and the bearings can rotate the display device mounting portion 65. I support it.

  A rotating shaft of a driving unit 64 such as a motor for driving the display device mounting unit 65 is connected to the extension of the shaft 31. By driving the driving unit 64, the shafts 31 and 32 are displayed as rotation centers. The device attachment portion 65 can be rotated and stopped at an arbitrary rotation position. Note that the angle of the display device mounting portion 65 can be manually adjusted, and even in this case, the display device mounting portion 65 can be stopped at an arbitrary rotation position.

Thereby, the inclination angle of the display part (display) 53 of the portable display device 50 attached to the display device attachment part 65 can be automatically adjusted as in the first embodiment.
In addition, about the operation | movement when the drive control part 63 of the display screen drive device 60 adjusts the angle of the display part (display) 53 of the portable display apparatus 50 automatically, operation | movement demonstrated with the flowchart shown in FIG. Since it is the same, description is abbreviate | omitted.

  In the second embodiment, the portable display device 50 is described as being formed by attaching the recessed portion 3 to the rear portion of the headrest 21 integrated with the seat back (back) 20 of the front seat of the vehicle. It goes without saying that the rear portion of the seat back (back) 20 of the seat may be pulled out into a rectangular concave shape to form the concave portion 3 and attached.

  As described above, even in the second embodiment, as in the first embodiment, the angle of the display unit (display) is also taken into consideration when the vehicle itself is inclined with respect to the horizontal plane of the earth. Automatically adjusts the front seat so that it can always be viewed by the rear seat viewer, even when the seat is reclining, when the vehicle is tilted, or when the angle changes when it hits the display (display). It is possible to maintain a state in which the display unit (display) is easily visible.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

  DESCRIPTION OF SYMBOLS 1 Front seat inclination detection part, 2 Vehicle inclination detection part, 10 Display apparatus, 11, 61 Front seat inclination acquisition part, 12, 62 Vehicle inclination acquisition part, 13, 63 Drive control part, 14,64 Drive part, 15 Display control Part, 16 display part (display), 17 control part, 20 front seat back (back), 21 front seat headrest, 30 recess, 31, 32 axle, 40 vehicle body (vehicle), 50 portable display device, 51 tilt Detection unit, 52 display control unit, 53 display unit (display), 60 display screen drive device, 65 display device mounting unit.

Claims (4)

A display unit that is attached to a front seat of a seat arranged back and forth in a vehicle so as to be visible to a viewer of a rear seat;
A drive unit for adjusting an inclination angle of the display unit;
A front seat inclination acquisition unit that acquires an inclination angle of the front seat with respect to a reference;
A vehicle inclination acquisition unit for acquiring an inclination angle of the vehicle with respect to the reference;
Instructing the drive unit to adjust the angle of the display unit based on the inclination angle of the front seat acquired by the front seat inclination acquisition unit and the inclination angle of the vehicle acquired by the vehicle inclination acquisition unit And a drive control unit for performing a display. The drive control unit instructs the drive unit to adjust the angle of the display unit based on a difference between a displacement amount of the front seat inclination angle and a displacement amount of the vehicle inclination angle. The display device according to claim 1. A portable display device that is attached to the front seat of a vehicle seated back and forth in a vehicle and includes a display unit and an inclination detection unit that detects an inclination angle with respect to a reference can be viewed by a rear seat viewer. An attachable display device mounting portion;
A drive unit for adjusting an inclination angle of the display device mounting unit;
A front seat inclination acquisition unit that acquires an inclination angle detected by the inclination detection unit;
A vehicle inclination acquisition unit for acquiring an inclination angle of the vehicle with respect to the reference;
Based on the inclination angle of the front seat acquired by the front seat inclination acquisition unit and the inclination angle of the vehicle acquired by the vehicle inclination acquisition unit, the drive unit is adjusted to adjust the angle of the display device attachment unit. And a drive control unit for instructing the display screen. The drive control unit instructs the drive unit to adjust the angle of the display device mounting unit based on a difference between a displacement amount of the inclination angle of the front seat and a displacement amount of the vehicle inclination angle. The display screen driving device according to claim 3, wherein the display screen driving device is performed.

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