Vehicle display device

Abstract

To enhance location accuracy of a virtual image display position.SOLUTION: A display device for a vehicle comprises a display unit 10, a movable reflection member 20 which reflects a display light from the display unit, a drive unit 30 which rotates and drives the movable reflection member by output torque of a motor 31, a reflector 40 which reflects the reflection light of the movable reflection member to an eye point EP, a locking member 22 which locks the movable reflection member at an origin position P0 and a control device 50. The control device comprises a first origin control unit 53 which rotates and drives the movable reflection member within a displayable rotation scope Si as far as the origin position at a first rotary torque T1 when detecting an ignition off signal 71, a second origin control unit 54 which outputs the first rotary torque until the motor steps out while locking the movable reflection member to the locking member when detecting a wake-up signal 73, and a display return control unit 55 which rotates and drives the movable reflection member at the origin position at a second rotary torque T2 as far as a request rotary position within the displayable rotary scope after ending the second origin control.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vehicle display device.

Background Art

[0002] Conventionally, vehicles are equipped with a vehicle display device that displays virtual images of information provided to passengers in the vehicle interior. This vehicle display device is a so-called head-up display device including a display unit that emits display light related to display information, a reflection member that reflects the display light emitted from the display unit, and a reflector that reflects the reflected light from the reflection member to the passenger's eye point, and visually presents display information corresponding to the display light to the passenger as a virtual image. Further, this vehicle display device includes a motor that rotationally drives the reflection member, and changes the virtual image display position by rotationally driving the reflection member within a rotation region (displayable rotation region) where a virtual image based on the display light can be displayed. This type of vehicle display device is disclosed in, for example, Patent Documents 1 to 3 below.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] Incidentally, in this vehicle display device, the reflection member is once moved to the origin position outside the displayable rotation range by the output torque of the motor, and the reflection member is returned from the origin position to a predetermined position within the displayable rotation range again, whereby the positional deviation of the virtual image display position can be eliminated. Therefore, in this vehicle display device, in order to improve the positional accuracy of the virtual image display position, it is desirable to perform the origin position detection of the reflection member and the return to the displayable rotation range at an appropriate timing.

[0005] Therefore, an object of the present invention is to provide a vehicle display device capable of improving the positional accuracy of a virtual image display position.

Means for Solving the Problems

[0006] To achieve the above object, the present invention includes a display unit that emits display information to be visually recognized as a virtual image to the occupant in the vehicle interior as display light, a movable reflecting member that reflects the display light emitted from the display unit, a driving unit that includes a motor as a driving source and rotationally drives the movable reflecting member around an axis with the output torque of the motor, a reflector that reflects the display light reflected by the movable reflecting member to the eye point of the occupant, a locking member that locks the movable reflecting member at an origin position outside a displayable rotation region where it is possible to reflect the display light from the display unit to the reflector and display a virtual image based on the display light, and a control device that controls the driving unit to rotationally drive the movable reflecting member within the displayable rotation region and change the traveling direction of the reflected light of the display light in the movable reflecting member. The control device includes a first origin control unit that, when detecting an ignition-off signal, controls the driving unit to rotationally drive the movable reflecting member within the displayable rotation region to the origin position with the output torque in the first rotation direction of the motor, a second origin control unit that, when detecting a wake-up signal of the vehicle, controls the driving unit to output the output torque in the first rotation direction to the motor until the motor loses synchronization while the movable reflecting member is locked to the locking member, and a display return control unit that, after the second origin control of the second origin control unit is completed, controls the driving unit to rotationally drive the movable reflecting member at the origin position to a required rotation position within the displayable rotation region with the output torque in a second rotation direction opposite to the first rotation direction of the motor. When the second origin control unit detects the wake-up signal and does not detect the reconnection of the positive terminal of the storage battery, based on the estimation that the movable reflecting member is at the origin position, it controls the drive unit to output to the motor the output torque in the first rotation direction that can demagnetize the motor while keeping the movable reflecting member at the origin position locked to the locking member. On the other hand, when the wake-up signal is detected and the reconnection of the positive terminal of the storage battery is detected, based on the estimation that the rotational position of the movable reflecting member is uncertain, it controls the drive unit to rotationally drive the movable reflecting member at the upper limit rotational position of the displayable rotational region with the largest rotational angle from the origin position to the origin position, and output to the motor the output torque in the first rotation direction that can demagnetize the motor while keeping the movable reflecting member that has moved to the origin position locked to the locking member It is characterized by this.

Effect of the Invention

[0007] In the vehicle display device according to the present invention, when the vehicle side is in the ignition-off state, the movable reflecting member is returned to the origin position. After the vehicle side becomes in the ignition-on state again and the origin position of the movable reflecting member is established again, the movable reflecting member is rotated to the required rotation position within the displayable rotation region. In this vehicle display device, this is repeated every time the vehicle side becomes in the ignition-off state. Therefore, this vehicle display device can improve the position accuracy of the virtual image display position.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0009] Hereinafter, an embodiment of the vehicle display device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited by this embodiment.

[0010] [Embodiment] One embodiment of the vehicle display device according to the present invention will be described with reference to FIGS. 1 to 7.

[0011] Reference numeral 1 in FIG. 1 indicates the vehicle display device according to the embodiment. This vehicle display device 1 is a so-called head-up display device that displays virtual images of information provided to passengers in the vehicle interior (such as an automobile).

[0012] The vehicle display device 1 includes a display unit 10 that emits display information to be visually recognized as a virtual image by an occupant in the vehicle interior as display light (Fig. 1). Further, this vehicle display device 1 includes a movable reflecting member 20 that reflects the display light emitted from the display unit 10, and a drive unit 30 that includes a motor 31 as a drive source and rotationally drives the movable reflecting member 20 around an axis with the output torque of this motor 31 (Fig. 1). Still further, this vehicle display device 1 includes a reflector 40 that reflects the display light reflected by the movable reflecting member 20 to the eye point EP of the occupant (Fig. 1). Still further, this vehicle display device 1 includes a control device 50 that controls the display unit 10 and the drive unit 30 (Fig. 1).

[0013] This vehicle display device 1 includes a housing 61 that houses the display unit 10, the movable reflecting member 20, and the drive unit 30 inward, and a transparent cover 62 that closes the opening of this housing 61 (Fig. 1). And in this vehicle display device 1, the display unit 10, the movable reflecting member 20, and the drive unit 30 are housed in the instrument panel Pi in the vehicle interior with the cover 62 exposed (Fig. 1). In this vehicle display device 1, when making the occupant visually recognize a virtual image of the display light emitted from the display unit 10, the display light reflected by the movable reflecting member 20 is made to exit from the cover 62 to the outside of the housing 61 and projected onto the reflector 40 existing thereat.

[0014] The display unit 10 may have any form and configuration as long as it emits display information as display light toward the movable reflecting member 20. This exemplary display unit 10 includes, although not shown, a light source as a backlight and a display device that displays display information. In this display unit 10, light is emitted from the light source toward the display device, and display light of display information corresponding to the incident light from the light source is emitted from the display device.

[0015] For example, the display is configured to allow the emitted light of the light source to enter from the back surface and emit display light corresponding to the incident light from the back surface from the front surface. For example, as this display, a transmissive TFT liquid crystal (Thin Film Transistor Liquid Crystal Display) or the like is used. This display is configured to display, for example, image information such as characters, numbers, and graphics as display information. The control device 50 is provided with a display light control unit 51 that controls this display to perform display control of the display information (FIG. 1).

[0016] This display unit 10 is configured to emit display light from the display towards the movable reflecting member 20, for example. However, this display unit 10 may include a reflecting member that reflects the display light emitted from the display towards the movable reflecting member 20. The reflecting member is an enlarging mirror that enlarges and reflects the display light emitted from the display. As this reflecting member, for example, an aspherical (free-form surface) mirror is used.

[0017] The movable reflecting member 20 has a reflecting surface 20a that reflects the display light emitted from the display unit 10 towards the reflector 40 (FIG. 1). For example, as this movable reflecting member 20, an enlarging mirror that enlarges and reflects the display light emitted from the display unit 10 is used, similar to the reflecting member of the display unit 10. As this movable reflecting member 20, for example, an aspherical (free-form surface) mirror is used.

[0018] The reflector 40 has a reflecting surface 40a that reflects the display light reflected by the movable reflecting member 20 toward the eye point EP (FIG. 1). The reflector 40 shown here is formed as a half mirror that reflects the reflected light from the movable reflecting member 20 to the eye point EP with its reflecting surface 40a and emits the light from outside the vehicle to the occupant side. For example, this reflector 40 is formed in a plate shape along the curved surface shape of the front windshield Wf and is sealed together with an intermediate film in the front windshield Wf of the laminated glass. Further, this reflector 40 may be formed in a plate shape along the curved surface shape of the front windshield Wf and attached to the wall surface on the vehicle interior side of the front windshield Wf with an adhesive. Further, this reflector 40 may be a combiner that covers the front windshield Wf from the vehicle interior side.

[0019] Here, the movable reflecting member 20 has a rotation axis 21 having the vehicle width direction as the axial direction. By rotating the movable reflecting member 20 around the axis of the rotation axis 21, the incident angle of the display light emitted from the display unit 10 to the reflecting surface 20a is changed, and the emission angle of the display light reflected from the reflecting surface 20a toward the reflector 40 is changed. Then, by changing the emission angle of the display light directed from the movable reflecting member 20 toward the reflector 40, the imaging position (display position) of the virtual image related to the display light is changed in the vehicle vertical direction.

[0020] The drive unit 30 responsible for the rotation of the movable reflecting member 20 includes, for example, a power transmission mechanism (not shown) that transmits the output torque of the motor 31 to the rotation axis 21. The power transmission mechanism is composed of, for example, a gear group. A stepping motor is used for the motor 31 shown here.

[0021] In this vehicle display device 1, when it is not necessary for the occupant to visually recognize the virtual image or when it is not required to let the occupant visually recognize the virtual image, the display light from the display unit 10 cannot be reflected toward the reflector 40, and the movable reflecting member 20 is arranged at the origin position P0 where the virtual image cannot be displayed within the range of the upper limit position and the lower limit position of the specified virtual image display position (hereinafter referred to as the "virtual image display range"). When it is not necessary for the occupant to visually recognize the virtual image, for example, it is when the occupant gives an instruction to the vehicle side not to display the virtual image. Also, when it is not required to let the occupant visually recognize the virtual image, it is when the vehicle is parked, etc.

[0022] When it is necessary for the occupant to visually recognize the virtual image of the display light emitted from the display unit 10, the drive unit 30 rotationally drives the movable reflecting member 20 from the origin position P0 to the rotation region (hereinafter referred to as the "displayable rotation region") Si where it is possible to reflect the display light from the display unit 10 toward the reflector 40 and display a virtual image based on the display light. Specifically, the displayable rotation region Si is the range of the rotation position of the movable reflecting member 20 where it is possible to reflect the display light from the display unit 10 toward the reflector 40 and it is possible to display a virtual image within the specified virtual image display range. The drive unit 30 changes the virtual image display position within the virtual image display range by rotationally driving the movable reflecting member 20 within the displayable rotation region Si.

[0023] The control device 50 is provided with a display position control unit 52 that controls the drive unit 30 and controls the display position of the virtual image by rotationally driving the movable reflecting member 20 within the displayable rotation region Si (FIG. 1). This display position control unit 52 controls the drive unit 30 to rotationally drive the movable reflecting member 20 within the displayable rotation region Si and changes the traveling direction of the reflected light of the display light on the movable reflecting member 20.

[0024] For example, in the vehicle display device 1 shown here, by rotating the movable reflecting member 20 to the lower rotation position Pmin of the displayable rotation region Si, a virtual image is displayed at the lower position, and by rotating the movable reflecting member 20 to the upper rotation position Pmax of the displayable rotation region Si, a virtual image is displayed at the upper position. Therefore, when the required virtual image display position is the lower position, the required rotation position corresponding to the required virtual image display position becomes the lower rotation position Pmin of the displayable rotation region Si, and the movable reflecting member 20 is rotationally driven to this lower rotation position Pmin. Further, when the required virtual image display position is the upper position, the required rotation position corresponding to the required virtual image display position becomes the upper rotation position Pmax of the displayable rotation region Si, and the movable reflecting member 20 is rotationally driven to this upper rotation position Pmax. Also, when the required virtual image display position is at any location within the virtual image display range, the movable reflecting member 20 is rotationally driven to the required rotation position corresponding to the required virtual image display position.

[0025] Further, when the virtual image is not to be visually recognized by the occupant and when there is no need for the occupant to visually recognize the virtual image, the drive unit 30 rotationally drives the movable reflecting member 20 to the origin position P0 outside the displayable rotation region Si. This vehicle display device 1 includes a locking member 22 that locks the movable reflecting member 20 at the origin position P0 when the rotation drive of the movable reflecting member 20 to the origin position P0 is performed (FIG. 1).

[0026] When the drive unit 30 rotationally drives the movable reflecting member 20 from the displayable rotation region Si to the origin position P0, and when rotationally driving the movable reflecting member 20 from the upper limit rotation position Pmax side to the lower limit rotation position Pmin side of the displayable rotation region Si, the drive unit 30 generates an output torque (hereinafter referred to as "first rotation torque") T1 in the first rotation direction in the motor 31. Further, when the drive unit 30 rotationally drives the movable reflecting member 20 from the origin position P0 to the displayable rotation region Si, and when rotationally driving the movable reflecting member 20 from the lower limit rotation position Pmin side to the upper limit rotation position Pmax side of the displayable rotation region Si, the drive unit 30 generates an output torque (hereinafter referred to as "second rotation torque") T2 in the second rotation direction opposite to the first rotation direction in the motor 31. For example, in the motor 31 shown here, the second rotation direction is the normal rotation and the first rotation direction is the reverse rotation.

[0027] Here, regardless of the presence or absence of the occurrence of the positional deviation of the virtual image display position, the control device 50 returns the movable reflecting member 20 to the origin position P0 at a predetermined timing, thereby improving the positional accuracy of the virtual image display position when the movable reflecting member 20 is rotationally driven again to the displayable rotation region Si. This control device 50 executes the positional deviation elimination control of the virtual image display position when the ignition of the vehicle is turned off.

[0028] When detecting the ignition off signal (IG signal) 71 (FIG. 1), the control device 50 includes a first origin control unit 53 (FIG. 1) that controls the drive unit 30 to rotationally drive the movable reflecting member 20 within the displayable rotation region Si to the origin position P0 with the first rotation torque T1 of the motor 31. This first origin control unit 53 performs the first origin control to return the movable reflecting member 20 within the displayable rotation region Si to the origin position P0 as follows.

[0029] As shown in FIG. 2, the first origin control unit 53 determines whether or not the vehicle has been turned off (step ST1). The first origin control unit 53 determines whether or not the vehicle has been turned off by detecting the input of the ignition-off signal 71 from the vehicle side in step ST1. For example, the first origin control unit 53 repeats the determination in step ST1 until the ignition-off signal 71 is detected.

[0030] As shown in FIG. 2, when the first origin control unit 53 detects the ignition-off signal 71, it performs a timer process for determining the continuation of the ignition-off state (step ST2). In step ST2, the first origin control unit 53 determines whether or not the elapsed time (hereinafter referred to as the "ignition-off elapsed time") t after detecting the ignition-off signal 71 exceeds a predetermined time (hereinafter referred to as the "ignition-off determination time") t0 (t>t0?). Here, in the vehicle, the system sleep process is performed after a predetermined time has elapsed since the ignition was turned off. Therefore, the ignition-off determination time t0 used in step ST2 is set to a time obtained by subtracting the time required for the execution of the first origin control from the set time until the system enters the sleep process after the ignition is turned off, or a shorter time.

[0031] For example, if the first origin control unit 53 detects the ignition-on signal before the ignition-off determination time t0 has elapsed after detecting the ignition-off signal 71, as shown in FIG. 2, it stops the timer process and returns to step ST1. On the other hand, for example, if the first origin control unit 53 does not detect the ignition-on signal before the ignition-off determination time t0 has elapsed after detecting the ignition-off signal 71, as shown in FIG. 2, it determines that the ignition-off elapsed time t has exceeded the ignition-off determination time t0, and executes the first origin control before the system sleep process is performed (step ST3).

[0032] In step ST3, the first origin control unit 53 controls the drive unit 30 to output to the motor 31 a first rotational torque T1 that enables the movable reflecting member 20 to rotate from the current rotational position Pn within the displayable rotation region Si to the origin position P0 (FIG. 3). In step ST3, this first origin control unit 53 calculates the number of steps in the first rotational direction of the motor 31 required to rotate the movable reflecting member 20 from the current rotational position Pn within the displayable rotation region Si to the origin position P0, and drives and controls the motor 31 based on that number of steps. Thereby, the movable reflecting member 20 is rotated from the current rotational position Pn within the displayable rotation region Si to the origin position P0. Then, as this movable reflecting member 20 rotates, it comes into contact with the locking member 22 and is locked to the locking member 22 at the origin position P0.

[0033] In the vehicle, after this first origin control is completed, a sleep process is executed. For this reason, as shown in FIG. 2, a sleep signal 72 (FIG. 1) is input to the control device 50 from the vehicle side (step ST4).

[0034] After that, when the vehicle side becomes in the ignition-on state and a restart process (so-called wake-up process) of the vehicle system is performed and a wake-up signal 73 (FIG. 1) is input from the vehicle side, the control device 50 returns the movable reflecting member 20 to the displayable rotation region Si. In this vehicle display device 1, by having the movable reflecting member 20 present at the origin position P0 before the return, the position accuracy of the required rotational position when the movable reflecting member 20 moves to the displayable rotation region Si (that is, the position accuracy of the virtual image display position) becomes accurate. For this reason, the control device 50 includes a second origin control unit 54 that, when detecting the wake-up signal 73 of the vehicle, controls the drive unit 30 to output to the motor 31 the first rotational torque T1 until the motor 31 detunes while the movable reflecting member 20 is locked to the locking member 22, in order to surely keep the movable reflecting member 20 present at the origin position P0 before the return (FIG. 1). This second origin control unit 54 performs the second origin control for surely keeping the movable reflecting member 20 present at the origin position P0 as follows.

[0035] When the second origin control unit 54 detects a wake-up signal 73 of the vehicle (step ST5) as shown in FIG. 2, it determines whether there has been a reconnection of the positive terminal of the vehicle's battery (+B reconnection) (for example, whether the battery has been replaced, etc.) (step ST6).

[0036] When there is no +B reconnection, such as when the battery has not been replaced, the vehicle's constant power supply (+B) remains connected. For example, information such as the movable reflecting member 20 existing at the origin position P0 remains in the RAM (Random Access Memory) of the control device 50. Therefore, when the +B signal 74 from the vehicle side is input or such information remains in the RAM, the second origin control unit 54 determines that there is no +B reconnection in step ST6 and estimates that the movable reflecting member 20 exists at the origin position P0 based on that information. On the other hand, when there has been a +B reconnection, such as when the battery has been replaced, the vehicle's constant power supply (+B) is once disconnected, and for example, the information recorded in the RAM of the control device 50 (information such as the movable reflecting member 20 existing at the origin position P0) is erased. Therefore, if such information does not remain in the RAM, the second origin control unit 54 determines that there has been a +B reconnection in step ST6 and estimates that the rotational position of the movable reflecting member 20 is uncertain.

[0037] When the second origin control unit 54 detects the wake-up signal 73 and does not detect the +B reconnection as shown in FIG. 2, based on the estimation that the movable reflecting member 20 is present at the origin position P0, the second origin control unit 54 executes the second origin control when the movable reflecting member 20 is at the origin position P0 (step ST7). In step ST7, the second origin control unit 54 controls the drive unit 30 to output to the motor 31 a first rotational torque T1 that enables the motor 31 to be demagnetized while the movable reflecting member 20 at the origin position P0 is locked by the locking member 22 (FIG. 4). In step ST7, the second origin control unit 54 calculates the number of steps in the first rotation direction of the motor 31 required to demagnetize the motor 31 while the movable reflecting member 20 at the origin position P0 is locked by the locking member 22, and drives and controls the motor 31 by that number of steps. As a result, in the vehicle display device 1 at this time, the movable reflecting member 20 surely exists at the origin position P0.

[0038] On the other hand, as shown in FIG. 2, when the second origin control unit 54 detects the wake-up signal 73 and detects the +B reconnection, based on the estimation that the rotational position of the movable reflecting member 20 is uncertain, the second origin control when the rotational position of the movable reflecting member 20 is uncertain is executed (step ST8). In step ST8, this second origin control unit 54 controls the drive unit 30 so that even if the movable reflecting member 20 exists at the upper limit rotational position Pmax of the displayable rotational region Si having the largest rotational angle from the origin position P0, the first rotational torque T1 that can move this movable reflecting member 20 to the origin position P0 is output to the motor 31 (FIGS. 5 and 6). Therefore, this second origin control unit 54 rotationally drives the movable reflecting member 20 at the upper limit rotational position Pmax to the origin position P0, and outputs to the motor 31 the first rotational torque T1 that can demagnetize the motor 31 while keeping the movable reflecting member 20 that has moved to the origin position P0 locked to the locking member 22. In step ST8, this second origin control unit 54 calculates the number of steps in the first rotational direction of the motor 31 required to rotate the movable reflecting member 20 from the upper limit rotational position Pmax to the origin position P0 of the displayable rotational region Si, and calculates the number of steps in the first rotational direction of the motor 31 required to demagnetize the motor 31 while keeping the movable reflecting member 20 at the origin position P0 locked to the locking member 22, and drives and controls the motor 31 with the total value of these numbers of steps. As a result, in the vehicle display device 1 at this time, the movable reflecting member 20 will surely exist at the origin position P0. For example, FIG. 5 shows the second origin control when the movable reflecting member 20 has moved within the displayable rotational region Si before the +B reconnection is performed. Further, FIG. 6 shows the second origin control when the origin position P0 of the movable reflecting member 20 accompanying the execution of the first origin control is maintained even after the +B reconnection is performed.

[0039] After the control device 50 finishes the second origin control in step ST7 or step ST8, it rotates the movable reflecting member 20 at the origin position P0 to the required rotation position within the displayable rotation region Si. Therefore, after finishing the second origin control, this control device 50 includes a display return control unit 55 that controls the drive unit 30 to rotationally drive the movable reflecting member 20 at the origin position P0 to the required rotation position within the displayable rotation region Si with the second rotational torque T2 of the motor 31 (FIG. 1). This display return control unit 55 performs display return control to rotate the movable reflecting member 20 at this origin position P0 within the displayable rotation region Si to restore the virtual image display as follows.

[0040] As shown in FIG. 2, after the display return control unit 55 finishes the second origin control in step ST7 or step ST8, it calculates the required rotation position within the displayable rotation region Si of the movable reflecting member 20 and executes display return control (step ST9). In step ST9, this display return control unit 55 calculates the required virtual image display position based on, for example, the command value of the virtual image display position given by the occupant from inside the vehicle cabin or the detected value of the occupant's eye point EP (when the position of the eye point EP can be detected by an imaging device or the like), and calculates the required rotation position within the displayable rotation region Si of the movable reflecting member 20 corresponding to this required virtual image display position. Then, in step ST9, this display return control unit 55 controls the drive unit 30 to output to the motor 31 the second rotational torque T2 that can rotate the movable reflecting member 20 at the origin position P0 to the required rotation position within the displayable rotation region Si (FIG. 7). In step ST9, this display return control unit 55 calculates the number of steps in the second rotation direction of the motor 31 required to rotate the movable reflecting member 20 at the origin position P0 to the required rotation position within the displayable rotation region Si, and drives and controls the motor 31 by that number of steps. As a result, in this vehicle display device 1, the movable reflecting member 20 will be at the required rotation position within the displayable rotation region Si, and a virtual image with high positional accuracy can be displayed at the required virtual image display position.

[0041] As described above, in this vehicle display device 1, when the vehicle side is in the ignition-off state, the movable reflecting member 20 is returned to the origin position P0. After the vehicle side becomes the ignition-on state again and the origin position P0 of the movable reflecting member 20 is established again, the movable reflecting member 20 is rotated to the required rotation position within the displayable rotation region Si. In this vehicle display device 1, this is repeated every time the vehicle side becomes the ignition-off state. Therefore, this vehicle display device 1 can improve the positional accuracy of the virtual image display position.

[0042] Furthermore, in this vehicle display device 1, since the movable reflecting member 20 is returned to the origin position P0 when the vehicle side is in the ignition-off state, it is difficult for sunlight to hit the reflecting surface 20a of the movable reflecting member 20. Therefore, this vehicle display device 1 can suppress a decrease in durability due to solar heat collection on the reflecting surface 20a.

[0043] Moreover, in this vehicle display device 1, when there is no +B reconnection, the execution time of the second origin control is shorter than when there is +B reconnection. Therefore, it is possible to shorten the time from when the vehicle becomes the wake-up state until the virtual image is displayed. And since this vehicle display device 1 only sets the execution time of the second origin control according to the system configuration, when applying it to vehicle models with different system configurations such as the optical system, the setting becomes easy.

Explanation of Reference Numerals

[0044] 1 Vehicle display device 10 Display unit 20 Movable reflecting member 22 Locking member 30 Driving unit 31 Motor 40 Reflector 50 Control device 53 First origin control unit 54 Second origin control unit 55 Display return control unit 71 Ignition-off signal 73 Wake-up signal 74 +B signal EP eye point P0 origin position Pmax upper limit rotation position Si displayable rotation range T1 first rotation torque (output torque in the first rotation direction) T2 second rotation torque (output torque in the second rotation direction)

Claims

【Claim 1】 A display unit that emits display information to be visually recognized as a virtual image by an occupant in the vehicle interior as display light; A movable reflecting member that reflects the display light emitted from the display unit; A drive unit including a motor as a drive source, and rotationally driving the movable reflecting member around an axis with the output torque of the motor; A reflector that reflects the display light reflected by the movable reflecting member to the eye point of the occupant; A locking member that locks the movable reflecting member at an origin position outside a displayable rotation region where the display light from the display unit can be reflected by the reflector to display a virtual image based on the display light; A control device that controls the drive unit to rotationally drive the movable reflecting member within the displayable rotation region and changes the traveling direction of the reflected light of the display light in the movable reflecting member; Comprising: The control device: When detecting an ignition-off signal, a first origin control unit that controls the drive unit to rotationally drive the movable reflecting member within the displayable rotation region to the origin position with the output torque in the first rotation direction of the motor; When detecting a wake-up signal of the vehicle, a second origin control unit that controls the drive unit to output the output torque in the first rotation direction to the motor until the motor loses synchronization while the movable reflecting member is locked to the locking member; After finishing the second origin control of the second origin control unit, a display return control unit that controls the drive unit to rotationally drive the movable reflecting member at the origin position to a required rotation position within the displayable rotation region with the output torque in a second rotation direction opposite to the first rotation direction of the motor; Comprising: When the second origin control unit detects the wake-up signal and does not detect the reconnection of the positive terminal of the storage battery, based on the estimation that the movable reflecting member is present at the origin position, the drive unit is controlled to output to the motor the output torque in the first rotation direction that enables the motor to be demagnetized while the movable reflecting member at the origin position is locked to the locking member. On the other hand, when the wake-up signal is detected and the reconnection of the positive terminal of the storage battery is detected, based on the estimation that the rotational position of the movable reflecting member is uncertain, the drive unit is controlled to rotationally drive the movable reflecting member at the upper limit rotational position of the displayable rotational range having the largest rotational angle from the origin position to the origin position, and output to the motor the output torque in the first rotation direction that enables the motor to be demagnetized while the movable reflecting member that has moved to the origin position is locked to the locking member. A vehicle control device characterized by the above.

Images