JP2009001065A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the construction of a display device having a display part to be driven by an electric motor. <P>SOLUTION: The electric motor 20 is controlled in accordance with the position and movement of the display part 16 detected by a position sensor 22. When the movement of the display part 16 being at rest is detected, the electric motor 20 is controlled to move the display part 16 to a predetermined position in a predetermined direction depending on the position and movement at this time. No need exists to provide switches exposed to the outside for instructing the operation of the electric motor 20, thus simplifying the construction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device that stores and exposes a display screen by moving a display unit including the display screen.

  Patent Document 1 listed below discloses a display device incorporated in an instrument panel of a vehicle. This display device is a display device of a car navigation device, and is rotatably installed on the upper surface of the instrument panel. By rotating, the display screen is stored so that the display screen faces downward when not in use and the back side of the display screen is integrated with the instrument panel. It can be a facing position. In addition, the display device described in this document rotates by being driven by a motor.

JP 2000-39847 A

  In a display device that is driven by a drive source such as an electric motor to open and close a display screen, a switch for instructing an opening / closing operation is required. In general, an externally exposed switch such as a push button switch is provided, and an electric motor is commanded by operating this switch. However, a space for providing a switch is required. For example, when the device is installed on the instrument panel of a vehicle like the device of the above-mentioned Patent Document 1, a switch or the like of other vehicle-mounted equipment is installed on the instrument panel. It may not be obtained.

  The present invention provides a display device in which a display screen is stored and expanded by driving an electric motor, and the storage and expansion instructions are performed without using an externally exposed switch.

  The display device of the present invention includes a display screen, and includes a display unit that is movable between a storage position where the display screen is stored and a development position where the display screen is exposed. The movement of the display unit is realized by being driven by an electric motor. A position sensor for detecting the position of the display unit in the moving direction is provided. When it is detected by the position sensor that the display unit is stationary at a predetermined position and moved, the control unit detects that the display unit has a predetermined position based on the stationary position and the direction of movement. The electric motor is controlled to move to a predetermined position in the direction.

  When the position sensor detects that the display unit has moved in a direction away from the deployment position when the display unit is in the storage position, the control unit issues a command to the electric motor to move the display unit to the deployment position. I can do it. In addition, when the position sensor detects that the display unit has moved in the direction away from the storage position when the display unit is in the unfolded position, the control unit instructs the electric motor to move the display unit to the storage position. You can do it.

  Furthermore, at least one intermediate deployment position can be set between the storage position and the deployment position, and the electric motor can move the display unit to this position. At this time, when the position sensor detects that the display unit is moved to the storage position side when the display unit is at the expansion position or at an intermediate expansion position other than the intermediate expansion position closest to the storage position, the control unit The electric motor can be instructed to move the display unit to an intermediate deployment position that is closer to one storage position than the position at that time.

  When the position sensor detects that the display unit is moved to the storage position side when the display unit is at the intermediate deployment position closest to the storage position, the control unit instructs the electric motor to move the display unit to the deployment position. It can be done against.

  In addition, when the position sensor detects that the display unit has moved to the deployment position side when the display unit is at the intermediate deployment position, the control unit issues a command to the electric motor to move the display unit to the storage position. I can do it.

  In addition, the control unit stores a stationary position immediately before the display unit reaches the storage position, and when the display unit is expanded next, the control unit is configured to move the display unit to the stored position. Commands can be given to the motor.

  By using a position sensor that detects the position of the display unit to control the movement of the display unit, it is not necessary to provide an externally exposed switch.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a schematic configuration of a display device 10 according to the present embodiment. The illustrated display device 10 is a device provided on the upper surface 12 of an instrument panel of a vehicle. The display unit 16 including the display screen 14 can be rotated along the direction of an arrow A in the drawing. By this rotation, the display unit 16 moves the display screen 14 shown in FIG. 2A toward the front side, that is, the vehicle passenger side, and the display screen 14 shown in FIG. The storage position stored toward the camera can be taken. In the storage position, the design surface 18 which is the surface of the display unit 16 on the side opposite to the display screen 14 is substantially flush with the upper surface 12 of the instrument panel, so that the entire instrument panel has a sense of unity. .

  The display unit 16 is rotated between a retracted position and a deployed position by an electric motor (hereinafter simply referred to as a motor) 20. Furthermore, a position sensor 22 that detects the position of the display unit 16 in the rotation direction is provided. The position sensor 22 outputs a position signal corresponding to the position of the display unit 16 to the control unit 24. The controller 24 controls the operation of the motor 20 based on this position signal.

  The display unit 16 can also stop at an intermediate deployment position between the storage position and the deployment position. FIG. 3 shows an example of stationary positions that the display unit 16 can take. The display unit 16 at the development position is indicated by a solid line, and the storage position is indicated by a one-dot chain line. The position of the display screen 14 at the storage position (indicated by reference numeral 26) is 0 °, and the angular position θ is taken counterclockwise in FIG. The angular position of the display screen 14 at the unfolded position is indicated by reference numeral 28. In this example, the display unit 16 can take two intermediate development positions. This intermediate development position is indicated by reference numerals 30 and 32, and the one near the development position is referred to as a first intermediate development position 30 and the one far from the development position is designated as a second intermediate development position 32. By providing the intermediate deployment positions 30 and 32, the direction of the display screen 14 can be adjusted to a direction that suits the passenger's desire. In addition, the reflection of illumination or the like on the display screen 14 can be made inconspicuous.

  FIG. 4 is a block diagram illustrating a circuit configuration of the display device 10. The CPU (central processing unit) functioning as the control unit 24 includes a power line (+ B) from the in-vehicle battery, an accessory signal line (ACC) from the key cylinder, an ignition signal line (IG), and a ground line (GND). It is connected. A position signal from the position sensor 22 is input to the CPU 24. This position signal is a voltage signal corresponding to the angular position θ of the display unit 16. The CPU 24 recognizes the angular position θ of the display unit 16 from this voltage value. The CPU 24 also controls the motor 20 via an interface (I / F) 36. A video signal is sent to a display panel 34 constituted by a flat panel display such as a liquid crystal display device via a flexible printed wiring board (FPC).

FIG. 5 is a timing chart for explaining the opening / closing operation of the display unit 16. (A) shows ON / OFF of the accessory signal line (ACC), and the driving of the display unit 16 is permitted only when this is ON. (B) shows the angular position θ of the display unit 16, and in the figure, the storage position, the deployed position, and the first and second deployed positions are shown as positions where the display unit 16 stops. When the display unit 16 is stopped, when the passenger moves the display unit 16, the motor is driven and the display unit is rotated based on the direction of the movement and the stopped position.
(1) When the display unit 16 is in the retracted position, when it is detected that the angular position θ is reduced, the display unit 16 is rotationally driven to reach the deployed position.
(2) When it is detected that the angular position θ is increased when the display unit 16 is in the deployed position, the display unit 16 is rotationally driven to reach the storage position.
(3) When it is detected that the angular position θ is small when the display unit 16 is in the deployed position, the display unit 16 is rotated to the first intermediate deployed position.
(4) When the display unit 16 is in the first intermediate deployment position, if it is detected that the angular position θ is small, the display unit 16 is rotated to the second intermediate deployment position.
(5) When the display unit 16 is in the second intermediate deployment position, if it is detected that the angular position θ is small, the display unit 16 is rotated to the deployment position.

  The rotation control of the display unit will be described in more detail using the flowcharts of FIGS. In the description, the range of the angular position θ of the display unit 16 is grouped as shown in FIG. The first range R <b> 1 is a range between the storage position 26 and the second intermediate deployment position 32 and the second intermediate deployment position 32. The second range R2 is a range between the second intermediate deployment position 32 and the first intermediate deployment position 30 and the first intermediate deployment position. The third range R3 is a range between the first intermediate deployment position 30 and the deployment position 28 and the deployment position.

  6 and 7 are flowcharts showing the control of the opening / closing operation of the display unit. Based on the position signal from the position sensor 22, the movement of the display unit 16 is monitored. First, it is determined whether or not the display unit 16 has moved in the direction of decreasing the angular position θ from the stationary position (S100). When the angular position θ moves in the direction of decreasing (Yes), it is determined which position is stationary (S102), and the target position corresponding to that position, that is, the display unit 16 moves to the next position. Is set to a stationary position (S104 to S110). When the display unit 16 is stationary in the third range R3, the target position is set to the first intermediate deployment position 30 (S104). When the display unit 16 is stationary in the second range R2, the target position is set to the second intermediate deployment position 32 (S106). When the display unit 16 is stationary in the first range R1, the target position is set to the development position 28 (S108). If the display unit 16 is in the storage position 26, the target position is set to the position of the display unit when it was previously expanded (hereinafter referred to as the previous expanded position) (S110). As the previous development position, when the display unit 16 is stored, the previous stationary position, that is, the development position 28, the first or second intermediate development position 30, 32, is stored, and this stored position is stored in step S110. To set the target position. Note that the initial value of the previous development position is set to the development position 28. When it is recognized that the position of the display part 16 is other than this, it is considered that it is an error and it complete | finishes as it is.

  If it is determined in step S100 that the display unit 16 does not move in the direction of decreasing the angular position θ (No), it is determined whether the display unit 16 has moved in the direction of increasing the angular position θ (S200). When it is not moving in this direction (No), the display unit 16 is not moved, and the opening / closing operation control ends. When moving in the direction of increasing the angular position θ (Yes), it is determined which position was stationary (S202), setting of the target position according to the position (S204 to S208) and the previous time The development position is stored (S210 to S214).

  When the display unit 16 is stationary in the third range R3, the target position is set to the storage position 28 (S204), and the development position 28 is stored as the previous development position (S210). When the display unit 16 is stationary in the second range R2, the target position is set to the storage position 28 (S206), and the first intermediate deployment position 30 is stored as the previous deployment position (S212). When the display unit 16 is stationary in the first range R1, the target position is set to the storage position 28 (S208), and the second intermediate deployment position 32 is stored as the previous deployment position (S214). If the position of the display unit 16 is other than the above, it is considered an error, and the control is stopped and the process is terminated.

  Returning to FIG. The set target position and the display unit position are compared (S112, S114). When the target position is larger than the display unit position, that is, when the display unit 16 needs to be moved toward the unfolded position, the display unit is opened. Operation control is executed (S116). When the target position is smaller than the display unit position, that is, when it is necessary to move the display unit 16 toward the storage position, the display unit closing operation control is executed (S118).

  FIG. 8 is a flowchart of the opening operation control of the display unit in step S116 (see FIG. 6). As described above, the setting of the target position is completed before this flow is executed. The control unit 24 drives the motor 20 in a direction in which the angular position θ increases while monitoring the position of the display unit 16 using the position signal from the position sensor 22. During this time, the position of the display unit 16 is compared with the set target position, that is, the target position stored in the memory in the control unit 24, and the motor continues to be driven until they match. When the target position is reached, the motor 20 is stopped.

  FIG. 9 is a flowchart of the closing operation control of the display unit in step S118 (see FIG. 6). As described above, the setting of the target position is completed before this flow is executed. The control unit 24 drives the motor 20 in a direction in which the angular position θ is decreased while monitoring the position of the display unit using the position signal from the position sensor 22. During this time, the position of the display unit 16 is compared with the set target position, and the motor continues to be driven until they match. When the target position is reached, stop the motor.

  When the display unit 16 is pulled forward (in the direction of decreasing θ), when the display unit 16 before the start of control is at the deployment position 28, the closing operation control is executed and the first intermediate deployment position 30 is controlled. When the first intermediate deployment position 30 is reached, the closing operation control is executed in the same manner, and the second intermediate deployment position 32 is controlled.

  Even when the display unit 16 is pulled forward, if the display unit 16 before the start of control is at the second intermediate deployment position 32, the opening operation control is executed and moved to the deployment position 28. . When the display unit 16 is in the storage position 26, when the display unit is pushed in (direction in which θ is reduced), the opening operation control is executed, and the position of the display unit 16 when the display unit 16 is expanded before that, that is, the previous time. It is moved to the deployment position. This is the position stored in steps S210 to S214 in FIG. By storing the previous development position, it is possible to reproduce the same state as when the previous display unit 16 was developed and used.

  When the stationary display unit 16 is pushed in the back direction (direction in which θ is increased), the above closing operation control is executed at any position except the storage position, and the display unit 16 is located where it is. Even in such a case, the storage position 26 is controlled. The position before execution of the opening operation control is stored as the previous expansion position. When the display unit 16 is expanded next time, the position is expanded to the stored previous expansion position.

  The intermediate development position is not limited to two, but may be one, or may be three or more. Further, it is not necessary to provide an intermediate deployment position. Storage and expansion of the display unit may be performed by an operation other than rotation. For example, the storage and expansion of the display unit can be realized by a slide operation, and an operation combining rotation and slide can be employed. Moreover, not only the display part with which the instrument panel of the vehicle was equipped but the above-mentioned control can be performed about the display apparatus by which a display part is driven with a motor, and is stored and expand | deployed.

It is a figure which shows schematic structure of the display apparatus 10 of this embodiment. It is a figure which shows the expansion | deployment state and storage state of the display part. It is explanatory drawing about angle position (theta) of the display part. 3 is a diagram illustrating a configuration of an electric circuit of the display device 10. 6 is a timing chart showing an example of an opening / closing operation of the display unit 16. 4 is a flowchart illustrating control of an opening / closing operation of the display unit 16. 4 is a flowchart illustrating control of an opening / closing operation of the display unit 16. 4 is a flowchart of control of opening operation of the display unit 16. 4 is a flowchart of closing operation control of the display unit 16.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Display apparatus, 14 Display screen, 16 Display part, 20 Motor, 22 Position sensor, 24 Control part, 26 Storage position, 28 Deployment position, 30 1st intermediate deployment position, 32 2nd intermediate deployment position

Claims (6)

A display device having a display screen is movable between a storage position where the display screen is stored and a development position where the display screen is exposed,
An electric motor for moving the display unit between a retracted position and a deployed position;
A position sensor for detecting the position of the display unit;
When the position sensor detects that the display unit has been moved from a stationary state, the display unit is moved to a predetermined position in a predetermined direction based on the stationary position and the moved direction. A control unit for controlling the electric motor,
Having a display device The display device according to claim 1,
The control unit controls the electric motor so that the display unit moves to the deployment position when the position sensor detects that the display unit has moved away from the deployment position when the display unit is stationary at the storage position. When the sensor detects that the display unit has moved further away from the storage position when the display unit is stationary at the unfolded position, the electric motor is controlled so that the display unit moves to the moving position.
A display device. The display device according to claim 2,
The electric motor can move the display unit to at least one intermediate deployment position between the storage position and the deployment position,
When the position sensor detects that the display unit has moved in the storage position direction when the display unit is stationary at the intermediate deployment position or the deployment position other than the intermediate deployment position closest to the storage position, the control unit Control the electric motor so that the display unit moves to the intermediate deployment position on the storage position side.
Display device.   4. The display device according to claim 3, wherein when the position sensor detects that the display unit moves in the storage position direction when the display unit is stationary at the intermediate deployment position closest to the storage position, A display device that controls an electric motor so that the display unit moves to a deployed position.   5. The display device according to claim 3, wherein when the position sensor detects that the display unit moves in the deployment position direction when the display unit is stationary at the intermediate deployment position, the control unit A display device that controls an electric motor to move to a storage position.   5. The display device according to claim 4, wherein the control unit stores a position where the display unit is stationary immediately before the display unit becomes the storage position, and stops the straight line when the display unit is expanded next time. A display device that controls the electric motor so that the display unit moves to a certain position.

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