JP5488279B2 - Head-up display device for vehicle - Google Patents

Description

  The present invention relates to a head-up display device for vehicles (hereinafter referred to as “HUD device”).

  Conventionally, a vehicle HUD device that displays a virtual image of vehicle-related information by displaying a light emission image on a display and projecting the display image onto a projection member such as a windshield is known. As a kind of such HUD device, Patent Document 1 discloses a device that reflects a display image of a display with a reflecting mirror such as a concave mirror and projects the reflected image onto a projection member. By using the reflecting mirror in this way, it is possible to reduce the installation space occupied by the HUD device in the vehicle.

  In the HUD device disclosed in Patent Document 1, in order to adjust the display position of the virtual image, a drive signal according to an adjustment command from the outside is applied to the stepping motor, and the reflecting mirror provided rotatably is used by the stepping motor. A configuration for rotational driving is adopted. According to such a configuration, the vehicle occupant can display the virtual image of the vehicle-related information in a state where it can be easily viewed by inputting an adjustment command to the HUD device.

JP 2009-132221 A

  In the HUD device disclosed in Patent Document 1, it is desirable that the display position can be smoothly and continuously adjusted according to the adjustment command in order to quickly and finely correspond the virtual image display position to the passenger's preference. Here, as a method of smoothly and continuously adjusting the display position of the virtual image, the drive signal is controlled so that the electrical angle changes by a set angle smaller than the interval between the stable points appearing for each predetermined electrical angle in the stepping motor, A method of micro-step driving the motor is conceivable.

  However, in the case of such micro-step driving, if the occupant tries to perform fine adjustment instead of continuous adjustment of the display position, the amount of change in the display position becomes too small, which may give the occupant a sense of incongruity. Therefore, when a method of controlling the drive signal so that the electrical angle changes at intervals of stable points in the stepping motor and driving the motor in full step is fine, fine adjustment is good, but continuous adjustment is smooth. This is also undesirable because it lacks and gives the passenger a sense of incongruity.

  The present invention has been made in view of the problems described above, and an object thereof is to provide a vehicle HUD device that adjusts the display position of a virtual image of vehicle-related information without giving a sense of incongruity to a vehicle occupant. There is to do.

The invention according to claim 1 includes a display device that displays a light emission image, and a reflection mirror that is rotatably provided and reflects the display image of the display device, and projects the reflection image of the reflection mirror onto a projection member. Thus, an optical system that displays a virtual image of vehicle-related information and a stepping motor that adjusts the display position of the virtual image by rotating the reflecting mirror by applying a drive signal having an amplitude corresponding to the electrical angle. In a vehicle head-up display device comprising: a stepping motor in which a stable point appears at every predetermined electrical angle; and a control system that controls a drive signal so that the electrical angle changes according to an adjustment command input from outside. When an adjustment command for continuously adjusting the virtual image display position is input, the control system controls the drive signal so that the electrical angle changes by a set angle smaller than the stable point interval. Stepping is performed by controlling the drive signal so that the electrical angle changes by the interval of the stable points when a microstep drive means for microstepping the papping motor and an adjustment command for fine adjustment of the virtual image display position are input. An adjustment command for continuously adjusting the virtual image display position is input when the full-step drive means for driving the motor at full step and the occupant operation for the operation member continue for a set time or longer, while the occupant operation for the operation member is set for the set time. And an input unit to which an adjustment command for finely adjusting the display position of the virtual image is input .

  In the invention according to the first aspect, when an adjustment command for continuously adjusting the display position of the virtual image of the vehicle-related information obtained by projecting the reflection image of the reflecting mirror rotated by the stepping motor onto the projection member is input. The stepping motor is driven by microsteps. The drive signal applied to the stepping motor in this microstep drive is controlled so that the electrical angle changes by a set angle that is smaller than the interval between the stable points, so a virtual image is generated according to the change in electrical angle by the small set angle. The display position can be adjusted smoothly and continuously. Therefore, when the virtual image display position is continuously adjusted, the vehicle occupant is not given a sense of incongruity.

  On the other hand, in the first aspect of the present invention, when an adjustment command for fine adjustment of the display position of the virtual image is input, the stepping motor is driven in full step. The drive signal applied to the stepping motor in this full-step drive is controlled so that the electrical angle changes greatly at intervals of stable points, so that the virtual image display position also gives the passenger a sense of incompatibility according to the change in the electrical angle. Fine adjustment can be made with such a large change amount as possible.

According to the first aspect of the present invention, when the occupant operation on the operation member continues for a set time or longer, microstep driving with a small electrical angle change is realized by the input of the adjustment command in the stepping motor. Thus, the virtual image display position can be adjusted continuously and smoothly according to the change in the electrical angle. On the other hand, when the occupant operation on the operation member is completed within the set time, a full-step drive with a large electrical angle change is realized in the stepping motor by the input of the adjustment command, so that it is not too small according to the electrical angle change and The virtual image display position can be finely adjusted so as not to be too large according to the operation time. According to these, the adjustment method that the vehicle occupant prefers among the two types of adjustment methods can be accurately determined from the operation time of the operation member by the occupant without causing the occupant to feel uncomfortable. .

From the viewpoint of human behavior, in general, the vehicle occupant finely adjusts the display position of the virtual image after continuously adjusting the display position of the virtual image. Therefore, according to the second aspect of the present invention, after the adjustment command for continuously adjusting the display position of the virtual image is input, the microstep driving means finely adjusts the display position of the virtual image after the stepping motor is microstep driven. When the adjustment command to be input is input, the full step driving means drives the stepping motor at full step. That is, in accordance with general behavior, the occupant can finely adjust the virtual image display position with an appropriate amount of change by full-step driving of the stepping motor after smoothly adjusting the virtual image display position by micro-step driving of the stepping motor. Therefore, the effect of suppressing the sense of incongruity can be enhanced.

If the current electrical angle deviates from any stable point after the end of the micro-step drive by inputting the adjustment command for continuous adjustment, the full-step drive that changes the electrical angle from the stable point as the starting point It becomes difficult to start step driving. Therefore, according to the third aspect of the present invention, the control system in which the full-step drive means changes the electrical angle from the stable point is the micro-step drive by inputting an adjustment command for continuously adjusting the display position of the virtual image. If the current electrical angle deviates from the stable point after the end of, the driving signal is controlled so that the electrical angle changes to the stable point, thereby forcibly driving means for forcibly driving the stepping motor. According to this, even if the current electrical angle deviates from the stable point after the end of the micro-step drive, the electrical angle can be changed to the stable point by forced drive, so full-step drive starting from the stable point is performed. It is possible to start with certainty and exert an effect of suppressing a sense of incongruity.

It is a block diagram which shows schematic structure of the vehicle HUD apparatus by one Embodiment of this invention. It is a schematic diagram which shows the display state of the virtual image by the HUD apparatus of FIG. It is sectional drawing which shows the stepping motor and reduction gear mechanism of FIG. It is an electric block diagram which shows the connection state of the stepping motor of FIG. 1, and a control system. It is a characteristic view which shows the example of the drive signal applied to the coil of the stepping motor of FIG. 2 is a flowchart showing a flow of drive signal control performed by the display control circuit of FIG. 1. It is a flowchart which shows the flow of the modification of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of a vehicle HUD device 1 according to an embodiment of the present invention.

(Basic configuration)
First, the basic configuration of the vehicle HUD device 1 will be described. The HUD device 1 mounted on a vehicle includes a housing 10, a display 20, an optical system 30, a stepping motor 40, a reduction gear mechanism 50, an adjustment switch 60, and a control system 70.

  The housing 10 is formed in a hollow shape that accommodates the other elements 20, 30, 40, 50 and the like of the HUD device 1, and is installed on the instrument panel 2 of the vehicle. The housing 10 has a translucent exit window 14 at a location facing the windshield 4 as a “projection member” fixed in front of the driver's seat of the vehicle in the vertical direction.

  In the present embodiment, the display 20 is a transmission illumination type liquid crystal panel, and has a screen 22 for displaying an image. The display 20 causes the display image of the screen 22 to emit light when the screen 22 is transmitted and illuminated by a built-in backlight (not shown). The light-emitting image displayed on the display 20 in this way notifies vehicle-related information related to vehicle driving or vehicle status. In this embodiment, for example, navigation information such as the vehicle traveling direction (FIG. 2). Reference). However, as for the display image of the display device 20, in addition to the navigation information, physical quantity information such as vehicle speed, fuel remaining amount, cooling water temperature, etc., and information on outside conditions such as traffic conditions and safety conditions may be reported. Good.

  The optical system 30 is composed of a plurality of optical members including the reflecting mirror 32 (in FIG. 1, other than the reflecting mirror 32 is not shown), and emits the display image of the display 20 to the emission window 14. Here, the reflecting mirror 32 is a concave mirror in this embodiment, and has a reflecting surface 34 that is recessed into a smooth curved surface. The reflecting mirror 32 magnifies and reflects the display image as an optical image incident directly or indirectly on the reflecting surface 34 from the display device 20 toward the exit window 14 side. The reflected image of the reflecting mirror 32 passes through the exit window 14 and is projected onto the windshield 4, thereby forming an image in front of the shield 4. As a result, the vehicle-related information indicated by the display image of the display device 20 is displayed on the driver's seat side in the vehicle as a virtual image 36 (see FIG. 2).

  The reflecting mirror 32 has a rotating shaft 38 that is rotatably supported by the housing 10. The reflecting mirror 32 changes the display position of the virtual image 36 as shown in FIG. Here, due to the optical characteristics of the optical system 30 and the windshield 4, in the present embodiment, the lower limit display position D1 of the virtual image 36 indicated by the solid line in FIG. 2 and the upper limit display position Du of the virtual image 36 indicated by the broken line in FIG. In between, the display of the virtual image 36 is realized.

  As shown in FIG. 3, the stepping motor 40 is a permanent magnet type having a claw pole structure in the present embodiment, and includes a rotor 41 and a stator 44. Here, the rotor 41 is formed by assembling a rotor magnet 43 on the outer peripheral side of a motor shaft 42 that is rotatably supported by a gear case 51 described later. 3 and 4, the stator 44 fixed to the gear case 51 includes a claw pole yoke 45a and a pair of coils 46a that form an A phase, and a claw pole yoke 45b and a pair of coils 46b that form a B phase. And the claw poles of the yokes 45a and 45b are arranged with a mechanical angle shifted by 1/2 pitch.

  In the stepping motor 40 having such a configuration, the coils 46a and 46b of the phases A and B receive and excite the drive signal, thereby rotating the rotor magnet 43 and generating motor torque on the motor shaft 42. Further, the stepping motor 40 generates a detent torque on the motor shaft 42 by the interaction between the coils 46a and 46b and the rotor magnet 43 even in a demagnetized state where no drive signal is applied to all the coils 46a and 46b. It has become.

  The reduction gear mechanism 50 is formed by meshing a plurality of gears 52 to 59 in series in a hollow gear case 51 that houses the stepping motor 40. Here, the first stage gear 52 is formed on the motor shaft 42, and the last stage gear 59 is formed on the rotating shaft 38 of the reflecting mirror 32. Therefore, the motor torque generated by the rotation of the motor shaft 42 by the stepping motor 40 is amplified according to the reduction ratio (gear ratio) between the gears 52 to 59 and transmitted to the rotating shaft 38, thereby reflecting the reflecting mirror. This is a torque for rotationally driving 32. Here, when the stepping motor 40 rotates forward, the reflecting mirror 32 also rotates forward so that the display position of the virtual image 36 moves upward. When the stepping motor 40 rotates backward, the display position of the virtual image 36 moves downward. The reflecting mirror 32 is also rotated in the reverse direction so as to move to.

  The adjustment switch 60 shown in FIGS. 1 and 4 is installed so that it can be pushed by a passenger on the driver's seat in the vehicle. The adjustment switch 60 selectively inputs two types of commands, an up adjustment command for moving the display position of the virtual image 36 upward and a down adjustment command for moving the display position of the virtual image 36 downward. It is possible to have two operation members 62 and 63 such as a push type, for example. The adjustment switch 60 outputs a command signal corresponding to the up adjustment command input by the occupant operation of the operation member 62 and a command signal corresponding to the down adjustment command input by the occupant operation of the operation member 63, respectively. It is possible.

  The control system 70 is a combination of the display control circuit 72 and a plurality of switching elements 74, and is disposed inside or outside the housing 10. In the present embodiment, the display control circuit 72 is an electric circuit mainly composed of a microcomputer, and is electrically connected to the display 20 and the adjustment switch 60. As shown in FIG. 4, each switching element 74 is a transistor whose collector is electrically connected to one of the coils 46a and 46b in this embodiment, and whose emitter and base are connected to ground (not shown) and the display control circuit 72, respectively. Electrical connection. Each switching element 74 changes the amplitude of the drive signal applied to the coils 46a and 46b of the A and B phases according to the base signal input from the display control circuit 72. Therefore, hereinafter, controlling the base signal to the switching element 74 by the display control circuit 72 will be described as controlling the drive signal to the coils 46a and 46b.

  In the control system 70 having such a configuration, the display control circuit 72 controls display of an image by the display device 20. At the same time, the display control circuit 72 controls drive signals to the coils 46a and 46b of the A and B phases in accordance with the command signal input from the adjustment switch 60. Specifically, the display control circuit 72 responds to the up adjustment command by the operation of the operation member 62, and the electric signals of the drive signals to the coils 46 a and 46 b of the respective phases so as to drive the reflector 32 together with the stepping motor 40. By controlling the angle, the display position of the virtual image 36 is changed upward. On the other hand, the display control circuit 72 controls the electrical angle of the drive signal to each phase coil 46a, 46b so as to drive the reflecting mirror 32 in reverse rotation together with the stepping motor 40 according to the down adjustment command by the operation of the operation member 63. As a result, the display position of the virtual image 36 is changed downward.

(Characteristic part)
Next, the characteristic part of the vehicle HUD device 1 according to the present embodiment will be described. In the HUD device 1, the drive signals to the coils 46 a and 46 b for the phases A and B are subjected to two-phase excitation of the stator 44 so that the amplitude corresponding to the electrical angle of the stepping motor 40 as illustrated in FIG. In the embodiment, the voltage amplitude is controlled. As a result, the drive signals to the respective phase coils 46a and 46b have the maximum amplitude (Vmax) or the minimum amplitude (as shown in FIG. 5) at the stable point θs at which the detent torque becomes maximum every electrical angle of substantially 90 degrees. 0) will be controlled.

  Here, with respect to the drive signal to one side of the A-phase coil 46a, the control characteristics when the microstep drive, the forced drive and the full step drive are performed by the stepping motor 40 are shown in the respective partial diagrams (a) and FIG. Examples are shown in (b) and (c). In the microstep drive shown in FIG. 5A, the drive signal is controlled so that the electrical angle changes by a set angle Δθ that is smaller than the interval Iθ (ie, substantially 90 degrees) of the stable point θs. In the forced drive shown in FIG. 5B, when the electrical angle at the end of the microstep drive is out of any stable point θs (θo in the same figure), in the change direction at the time of the microstep drive. The drive signal is controlled so that the electrical angle changes to the nearest stable point θs. In the full-step drive shown in FIG. 5C, the drive signal is controlled so that the electrical angle changes by an interval Iθ starting from one of the stable points θs.

  In the HUD device 1 that realizes these drive modes, the display control circuit 72 appropriately controls the drive signals to the phase coils 46a and 46b by switching the drive modes according to the command signal input from the adjustment switch 60. Then, the display position of the virtual image 36 is adjusted. Therefore, in the following, the flow of the drive signal control performed by the display control circuit 72 by executing the computer program will be described in detail with reference to FIG. 6 starts when the engine switch of the vehicle is turned on, and ends when the engine switch is turned off.

  First, in S101, the presence / absence of an input of an up adjustment command and a down adjustment command is determined based on a command signal from the adjustment switch 60. While the determination of both adjustment commands is not made, S101 is repeated while stopping the application of the drive signal to any of the coils 46a and 46b of the respective phases A and B, whereas either one is repeated. When it is determined that the adjustment command is present, the process proceeds to S102.

  In S102, which is shifted when the up adjustment command or the down adjustment command is determined, whether one of the operation members 62 and 63 corresponding to the adjustment command to be determined has been continued for a set time T or more from the start. Is determined based on a command signal from the adjustment switch 60. The time T is, for example, about 0.5 seconds so that the occupant does not feel discomfort or stress due to the time from the start of the operation of the adjustment switch 60 until the display position of the virtual image 36 changes. However, it may of course be preset to other values.

  When one of the operation members 62 and 63 is pressed and held for more than the set time T, the up adjustment command and the down adjustment command corresponding to the one operation are used to continuously adjust the display position of the virtual image 36. Is transferred from S102 to S103. In S103, the drive signals to the coils 46a and 46b of the A and B phases are controlled so that the microstep drive as illustrated in FIG. That is, the drive signal is changed from the current electrical angle to the next electrical angle separated by a set angle Δθ smaller than the interval Iθ of the stable point θs in the direction according to the up or down of the adjustment command. As a result, the reflecting mirror 32 is driven to rotate forward or backward according to the change in the electrical angle of the stepping motor 40, and the display position of the virtual image 36 continues upward while the operation member 62 or the operation member 63 is pressed long. Or it is adjusted downward. Note that the angle Δθ is preset to, for example, about 18 degrees as shown in FIG. 5A so that the display position adjustment of the virtual image 36 is smooth, but may be preset to another value.

  As shown in FIG. 6, in S <b> 104 following S <b> 103, it is determined based on the command signal from the adjustment switch 60 whether or not the input of the adjustment command by one operation of the operation members 62 and 63 is completed. That is, it is determined whether or not the micro-step drive which is continued during the operation of one of the operation members 62 and 63 and realizes the continuous adjustment of the display position of the virtual image 36 is completed. When the end determination of the microstep drive is made, the process proceeds from S104 to S105, and it is determined whether or not the current electrical angle is the stable point θs.

  When the current electrical angle deviates from the stable point θs immediately after the end of the microstep drive, the stepping motor 40 performs the forced drive as illustrated in FIG. 5B by shifting from S105 to S106. In this way, the drive signals to the coils 46a and 46b of the phases A and B are controlled. That is, the drive signal is changed from the current electrical angle to the next stable point θs in the direction of the electrical angle change at the time of microstep driving by the latest S103. As a result, even when the microstep drive is terminated at an electrical angle deviated from the stable point θs, the electrical angle of the stepping motor 40 is forcibly changed to any stable point θs.

  As described above, the case where one of the operation members 62 and 63 is continuously pressed for a set time T or more by the long press has been described. On the other hand, when one operation of the operation members 62 and 63 is finished within the set time T by one short press, the up adjustment command and the down adjustment command corresponding to the one operation are the virtual image 36. As a command to finely adjust the display position, the process proceeds from S102 to S107. In S107, the drive signals to the coils 46a and 46b of the A and B phases are controlled so that the full-step drive as illustrated in FIG. That is, the drive signal is changed from the one stable point θs, which is the current electrical angle, to the next stable point θs separated by the interval Iθ in the direction according to the adjustment command up or down. As a result, the reflecting mirror 32 is driven to rotate forward or reversely according to the change in the electrical angle of the stepping motor 40, and the display position of the virtual image 36 in a short time corresponding to the short pressing of the operation member 62 or the operation member 63. Is finely adjusted upward or downward.

  As shown in FIG. 6, after any of S105 to S107 is executed, the process returns to S101, so that S101 and subsequent S101 to S107 are repeated until the engine switch is turned off. Therefore, according to the general behavior of the occupant, first, when the operation member 62 or the operation member 63 is pressed for a set time T or longer, the stepping motor 40 is micro-step driven, and the display position of the virtual image 36 is changed. It is continuously adjusted (S101 to 104 in the first flow). Here, in the microstep drive, the drive signal is controlled so that the electrical angle changes by a set angle Δθ smaller than the interval Iθ of the stable point θs while the operation member 62 or the operation member 63 is pressed long. Therefore, the display position of the virtual image 36 can be adjusted continuously according to the operation time of the operation member 62 or the operation member 63 and smoothly according to the electrical angle change by a small set angle Δθ by such microstep driving. It is.

  If the electrical angle of the stepping motor 40 deviates from the stable point θs after the completion of such microstep driving, the electrical angle is changed to one of the stable points θs by forced driving of the stepping motor 40 (one (S105, S106 of the flow of the second round). On the other hand, when the electrical angle of the stepping motor 40 coincides with the stable point θs, the electrical angle is maintained as it is (S105 of the first round flow). As described above, in the present embodiment, after the micro step drive, the electrical angle is always controlled to the stable point θs before the operation member 62 or the operation member 63 is short-pressed by a general action of the occupant. Become.

  When the operation member 62 or the operation member 63 is pressed for a short time within the set time T by the occupant under the state where the electrical angle is controlled to the stable point θs, the stepping motor 40 starts the full step from the stable point θs. When driven, the display position of the virtual image 36 is finely adjusted (S101, S102, S107 in the second flow). Here, in the full step drive, the drive signal is controlled so that the electrical angle changes between the stable points θs by the interval Iθ during the short pressing of the operation member 62 or the operation member 63. Therefore, the display position of the virtual image 36 by such full-step driving is not too small according to the electrical angle change of the stable point θs by the interval Iθ, and is not too large according to the operation time of the operation member 62 or the operation member 63. It can be fine-tuned.

  As described so far, according to the HUD device 1 of the present embodiment, the adjustment method that the occupant likes among the two types of adjustment methods related to the display position of the virtual image 36 is accurately determined from the operation time by the occupant. This can be done without giving the passenger a sense of incongruity. In this embodiment, the display control circuit 72 that executes S101 to S104 corresponds to the “microstep driving means” recited in the claims, and the display control circuit 72 that executes S101, S102, and S107 is claimed. The display control circuit 72 that executes S104 to S106 corresponds to the “forced drive means” described in the claims.

(Other embodiments)
Although one embodiment of the present invention has been described, the present invention is not construed as being limited to the embodiment, and can be applied to various embodiments without departing from the gist of the present invention. .

  Specifically, in S106 of the drive signal control flow, the drive signal is sent from the current electrical angle to the stable point θs ahead of the next stable point θs in the direction of the electrical angle change at the time of microstep driving by the latest S103. Forcible driving may be performed so as to change. In S106 of the drive signal control flow, the drive signal is sent from the current electrical angle to the next to the next stable point θs in the direction opposite to the direction of the electrical angle change at the time of the microstep drive in S103. Forcible control may be implemented so as to change. Furthermore, as shown in FIG. 7 as a modification of the drive signal control flow, S105 and S106 may be performed between S102 and S107. Also in this case, the occupant operation within the set time T is confirmed after the microstep drive for continuous adjustment (S101 to S104 in the first flow) is performed by the general behavior of the occupant. (S101, S102 of the second flow), the electrical angle is controlled to the stable point θs by forced driving (S105, S106 of the second flow) or as it is (S105 of the second flow). In this control state, full-step driving for fine adjustment (S107 of the second flow) is performed.

  In addition, as the stepping motor 40, for example, a hybrid type other than the permanent magnet type of the above embodiment may be adopted as long as a stable point appears according to the detent torque. In addition to the liquid crystal panel of the above-described embodiment, for example, a display device that displays a light emission image using an EL (Electro-Luminescence) panel, an indicator, or the like may be adopted as the display device 20. In addition, as the “projection member” for projecting the reflection image of the reflecting mirror, a combiner or the like provided exclusively for the HUD device 1 is employed in addition to the windshield 4 fixed to the vehicle as in the above embodiment. May be.

DESCRIPTION OF SYMBOLS 1 Vehicle HUD (head up display) apparatus 2 Instrument panel, 4 Windshield (projection member), 10 Housing, 14 Output window, 20 Display, 22 Screen, 30 Optical system, 32 Reflective mirror, 34 Reflective surface, 36 Virtual image, 38 Rotating shaft, 40 Stepping motor, 41 Rotor, 42 Motor shaft, 43 Rotor magnet, 44 Stator, 45a, 45b Claw pole yoke, 46a, 46b Coil, 50 Reduction gear mechanism, 51 Gear case, 60 Adjustment switch 62, 63 Operation member, 70 Control system, 72 Display control circuit (microstep drive means / full step drive means / forced drive means), 74 switching element, T set time, θs stable point, Iθ interval, Δθ set angle

Claims (3)

A display for displaying a luminescent image;
An optical system that has a reflecting mirror that is rotatably provided and reflects a display image of the display, and that displays a virtual image of vehicle-related information by projecting the reflected image of the reflecting mirror onto a projection member;
A stepping motor that adjusts the display position of the virtual image by rotating the reflecting mirror by applying a drive signal having an amplitude corresponding to an electrical angle, and a stepping step in which a stable point appears at each predetermined electrical angle. A motor,
A control system for controlling the drive signal so that the electrical angle changes according to an adjustment command input from the outside;
In a vehicle head-up display device comprising:
The control system is
When the adjustment command for continuously adjusting the display position of the virtual image is input, the stepping motor is controlled by controlling the drive signal so that the electrical angle changes by a set angle smaller than the interval between the stable points. Microstep driving means for microstep driving,
When the adjustment command for finely adjusting the display position of the virtual image is input, the stepping motor is driven in a full step by controlling the drive signal so that the electrical angle changes at intervals of the stable points. Full step drive means;
When the occupant operation on the operation member continues for a set time or longer, the adjustment command for continuously adjusting the display position of the virtual image is input, while the occupant operation on the operation member ends within the set time, Input means for inputting the adjustment command for finely adjusting the display position of the virtual image;
A vehicle head-up display device. When the adjustment command for continuously adjusting the display position of the virtual image is input, the adjustment command for fine adjustment of the display position of the virtual image is input after the microstep driving means microstep drives the stepping motor. the Rukoto, the full-step drive means for a vehicle head-up display device according to claim 1, characterized in that the full-step driving the stepping motor. The control system in which the full-step drive means changes the electrical angle from the stable point as a starting point,
If the current electrical angle deviates from the stable point after the end of the microstep drive by inputting the adjustment command for continuously adjusting the display position of the virtual image, the electrical angle changes to the stable point. Forcibly driving means for forcibly driving the stepping motor by controlling the driving signal to
The vehicle head-up display device according to claim 1 , wherein the vehicle head-up display device is provided.

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