KR20180031344A - Head up display apparatus and method for controlling zpd thereof - Google Patents

Abstract

The present invention proposes a head-up display device and an image height initialization control method thereof, capable of improving the accuracy of a head-up display image height control function. To this end, according to the head-up display device and the image height initialization control method thereof according to an aspect of the present invention, salability can be improved while reducing manufacturing costs by reducing the stress and operation noise of a stopper generated in an image height initialization process in comparison with a conventional device by removing an internal limit switch when initialization (ZPD) control for head-up display image height control is performed, and improving logic after applying hard ZPD.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display apparatus and its image height initialization control method.

During driving of the vehicle, the driver operates while confirming vehicle information such as the traveling speed of the vehicle, the rotational speed of the engine, and the fuel amount displayed on the instrument panel. The dashboard is located on the dashboard of the vehicle, so the driver must turn his or her head in order to check the vehicle information, so that the driver's gaze is deviated from the front and there is a risk of a safety accident.

In order to solve such a risk, a vehicle head-up display (HUD) device has been developed as a device that provides driver safety and effectively transmits vehicle information to a driver.

The head-up display device displays the information of the instrument panel on the windshield in accordance with the driver's eye level, so that the driver can easily check the vehicle information while driving. Accordingly, the driver can safely operate the vehicle by confirming the vehicle information without taking his / her eyes from the front while driving the vehicle.

In the use of such a head-up display device, there are drivers having various eye levels, and performs initialization (ZPD) control for adjusting the image height of the head-up display device to move to the correct position according to the eye level of the driver.

One aspect of the present invention provides a head-up display device and a method of initializing the image height of the head-up display image.

A head-up display device according to an aspect of the present invention includes: a housing part mounted on a vehicle; An image output unit built in the housing unit to output an image; A first mirror that enlarges and reflects an image output from the video output unit; A second mirror for retroreflecting the image reflected by the first mirror and projecting it onto the windshield; And a position adjusting unit for adjusting a height of the image projected on the windshield by moving the position of the second mirror, wherein the position adjusting unit comprises: a motor; A gear rotated by a motor; A link member linearly moved along the longitudinal direction of the gear to rotate the second mirror when the gear rotates; And a stopper for restricting a moving section of the link member.

The stopper is brought into contact with the link member for head-up display image height initialization (ZPD).

Further, the head-up display apparatus according to an aspect of the present invention further includes a control unit for controlling the motor, and the control unit controls the rotation of the motor for ZPD in the head-up display image height initialization do.

The control unit controls the rotation of the motor such that the link member is brought into contact with the stopper and the second mirror is moved to the stopper position.

According to another aspect of the present invention, there is provided a head-up display apparatus including a storage unit for storing a head-up display image height initialization (ZPD) success flag, and the control unit controls flag- do.

If the flag is not checked, the control unit rotates the motor to bring the link member into contact with the stopper; The motor is further rotated to bring the link member into contact with the stopper again; Further comprising stopping rotation of the motor when the link member contacts the stopper, thereby controlling the head-up display image height initialization (ZPD).

When the flag is checked, the control unit rotates the motor to move the second mirror to the stopper position; Counting the rotation of the motor to determine whether the second mirror has reached the stopper position; When the second mirror reaches the stopper position, stopping the rotation of the motor is further included to control the head-up display image height initialization (ZPD).

Further, the head-up display device according to an aspect of the present invention may further include a switch which is turned on / off by a driver to output a video image of the head-up display device, And controls the rotation of the motor to reach the parking position.

Further, the head-up display device according to an aspect of the present invention further includes a storage unit for storing a rotation value, a stopper position rotation value, and a parking position rotation value for each head-up display image height position, To control the rotation, stop and rotation of the motor.

According to another aspect of the present invention, there is provided a head-up display apparatus including a current detector for detecting an electromotive force generated during rotation of a motor and transmitting the detected electromotive force to a control unit, Up Display Controls the image height initialization (ZPD).

When a signal is inputted from the current detection unit, the control unit rotates the motor to bring the link member into contact with the stopper; The motor is further rotated to bring the link member into contact with the stopper again; Further comprising stopping rotation of the motor when the link member contacts the stopper, thereby controlling the head-up display image height initialization (ZPD).

According to an aspect of the present invention, there is provided an image display apparatus including a mirror that reflects an image output from a video output unit and projects the image onto a windshield, a motor that rotates to adjust a height of an image projected on the windshield, A method of initializing an image height of a head-up display device including a link member for moving a position of a mirror and a stopper for moving a link section of the link member, the method comprising: determining whether an external force Judge; Detecting an electromotive force generated at the time of rotation of the motor through an electric current detecting unit when an external force is generated; When a signal is input from the current detection unit, it is determined whether battery power is on; When the battery is powered on, the motor is rotated to bring the link member into contact with the stopper; The motor is further rotated to bring the link member into contact with the stopper again; Up of the head-up display image height is performed, including stopping the rotation of the motor when the link member comes into contact with the stopper.

According to the head-up display device and the image height initialization control method thereof according to an aspect of the present invention, when the initialization (ZPD) control for height adjustment of the head-up display image is performed, the internal limit switch is deleted, By improving the logic, it is possible to reduce the stress and operation noise of the stopper generated during the initialization process of the image height adjustment, thereby reducing the manufacturing cost and improving the merchantability.

1 is a diagram illustrating the configuration of a head-up display apparatus according to an embodiment of the present invention.
2 is a perspective view of a position adjusting unit for moving a position of a second mirror for initializing an image height of a head-up display device according to an embodiment of the present invention.
3 is an operational state diagram of the position adjusting unit shown in FIG.
4 is a view schematically showing the position of the second mirror according to the operation state of the position adjusting unit shown in FIG.
FIG. 5 is a block diagram illustrating an image height initialization control of a head-up display apparatus according to an exemplary embodiment of the present invention.
6A and 6B are operation flowcharts illustrating a first algorithm for controlling initialization of an image height in a head-up display apparatus according to an exemplary embodiment of the present invention.
7 is an operation flowchart illustrating a second algorithm for controlling the initialization of the image height in the head-up display apparatus according to an embodiment of the present invention.

The embodiments described herein and the configurations shown in the drawings are preferred examples of the disclosed invention, and various modifications may be made at the time of filing of the present application to replace the embodiments and drawings of the present specification.

In addition, the same reference numerals or signs shown in the respective figures of the present specification indicate components or components performing substantially the same function.

Also, the terms used herein are used to illustrate the embodiments and are not intended to limit and / or limit the disclosed invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as " comprise ", " comprise ", or "have ", when used in this specification, designate the presence of stated features, integers, Steps, operations, components, parts, or combinations thereof, whether or not explicitly described herein, whether in the art,

It is also to be understood that terms including ordinals such as " first ", "second ", and the like used herein may be used to describe various elements, but the elements are not limited by the terms, It is used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Hereinafter, embodiments of the head-up display apparatus and the image height initialization control method disclosed with reference to the accompanying drawings will be described in detail.

1 is a diagram illustrating the configuration of a head-up display apparatus according to an embodiment of the present invention.

1, a head-up display device 1 according to an embodiment of the present invention includes a housing unit 10, a video output unit 20, a backlight unit 30, a first mirror 40, And a mirror 50.

The housing part 10 forms the appearance of the head-up display device 1 and is mounted on the dashboard of the vehicle.

The housing part 10 may be mounted on the inside of the dashboard, and the upper side may be exposed to the outside.

The housing unit 10 houses the image output unit 20, the backlight unit 30, the first mirror 40 and the second mirror 50 therein, An output portion 60 for outputting the image L toward the windshield 70 is formed.

The video output unit 20 is fixed to the housing unit 10 and generates and outputs an image. The image output unit 20 receives the light from the backlight unit 30 and generates the image L.

The video output unit 20 may be a project or a display panel.

The backlight unit 30 includes a light source composed of a plurality of light emitting diodes arranged on a light source substrate (not shown) at intervals, a lens member for emitting light toward the image output unit 20 by receiving light from the light source, And a light source case for housing the lens member.

The first mirror 40 is a plane mirror and is mounted between the image output unit 20 and the second mirror 50. The first mirror 40 reflects the image output from the image output unit 20 and transmits the reflected image to the second mirror 50.

The first mirror 40 preferably uses a plane mirror, but is not limited thereto.

The second mirror 50 is made up of an aspheric mirror and transmits the image reflected through the first mirror 40 to the windshield 70. The second mirror 50 reflects the image reflected through the first mirror 40 toward the output unit 60 and the reflected image is transmitted through the output unit 60 to the windshield 70 ).

That is, the second mirror 50 may be configured to perform a function of projecting an image representing predetermined vehicle information to the windshield 70. [ The second mirror 50 is preferably a mirror having a predetermined curvature and capable of reflecting light, but the present invention is not limited thereto.

The first mirror 40 and the second mirror 50 may be composed of at least one mirror. This is to prevent a shape in which the curvature of the windshield 70 varies from part to part and the image is distorted.

The windshield 70 can be a front glass or a front window of the vehicle that allows the driver to secure a field of view in front of the vehicle and can be a windshield glass. < / RTI >

The windshield 70 is a transparent body for securing the view of the driver, and may be provided with a wiper for removing snow or rain when the rain or snow falls.

The image output from the image output unit 20 is reflected by the first mirror 40 and the image reflected by the first mirror 40 is reflected by the second mirror 50 and reflected by the windshield 70 .

In this case, the actual image of the image is projected on the windshield 70, but the driver does not recognize the actual image. When viewed from the eye level E of the driver, the image recognized by the driver is a virtual image, which is located on the rear surface of the windshield 70. Through this process, the driver can recognize the current vehicle information.

The vehicle information at this time may be information relating to the operation of the vehicle or the vehicle condition, navigation information, or the like. For example, the vehicle information may be physical quantity information such as the traveling speed of the vehicle, the rotational speed and the fuel amount of the engine, and may be a traffic situation and a safety situation.

And a position adjusting unit 100 that adjusts the position of the second mirror 50 to adjust the height of the image projected onto the windshield 70 to match the eye level of the driver. The function of adjusting the position of the second mirror 50 to a height at which the image can be best viewed according to the eye level of the driver will be described with reference to FIG. 2 and FIG.

FIG. 2 is a perspective view of a position adjusting unit for moving a position of a second mirror for initializing an image height of the head-up display apparatus according to an embodiment of the present invention, and FIG. 3 is an operational diagram of the position adjusting unit shown in FIG.

The position of the second mirror 50 is moved by the position adjusting unit 100. This allows the position of the second mirror 50 to be moved by the position adjusting unit 100 so that the height of the image can be adjusted according to the field of view of the driver. In addition, the position adjusting unit 100 may mechanically restrain the second mirror 50 to prevent shaking.

2, the position adjusting unit 100 is connected to the actuating shaft 102 and the actuating shaft 102 provided in the second mirror 50, and includes a second mirror (not shown) And a driving unit 104 for rotating the driving unit 50. The operation shaft 102 is protruded from the side surface of the second mirror 50. The second mirror (50) is provided with a rotation shaft (51) rotatably supported by the housing part (10). The position of the second mirror 50 is moved by the rotation of the rotating shaft 51 to adjust the image height of the head up display device 1. [

The rotary shaft 51 protrudes from the center of the side surface of the housing portion 10 and the operation shaft 102 is formed below the rotary shaft 51. Of course, the operation shaft 102 may be formed on the upper portion of the rotation shaft 51. [

The driving portion 104 is engaged with the motor 105 and the worm 106 and the gear 106 rotated by the motor 105 and is rotated by the gear 106 when the gear 106 rotates. And a link member 107 which is linearly moved in the longitudinal direction of the link member 107 and is connected to the operation shaft 102. The end of the operating shaft 102 is provided with a bearing and the link member 107 connected to the operating shaft 102 is formed with a connecting piece 108 which is in contact with the front and rear of the bearing.

3, when the link member 107 is linearly moved, the second mirror 50 can be rotated about the rotation axis 51 and moved. In this way, the position of the second mirror 50 is moved and the image height of the head-up display device 1 is adjusted.

The driving unit 104 includes a guide frame 110 that fixes the driving unit 104 to the housing unit 10 and prevents the link member 107 from shaking when moving.

The guide frame 110 includes a motor mount portion 112 on which the motor 105 is seated and a gear mount portion 114 on which the gear 106 is seated. The motor mount portion 112 and the gear mount portion 114 ) Are separated by the partition wall 115. The barrier rib 115 prevents transmission of the vibration generated in the motor 105 and prevents the second mirror 50 from shaking.

A fixing bracket 117 is formed at the edge of the guide frame 110 to be engaged with the housing part 10. The fixing bracket 117 is refracted and brought into close contact with the bottom surface of the housing part 10 and is engaged by the fastening member.

The link member 107 is limited in the movement section by the stopper 120. [ The stopper 120 can restrict the movement section when the link member 107 is moved.

In addition, the stopper 120 is for initializing (ZPD) the image height adjustment of the head-up display device 1.

FIG. 4 is a view schematically showing the position of the second mirror according to the operation state of the position adjusting unit shown in FIG. 3, in which the link member 107 is moved to the position (ZPD, top of the image, And the position of the actual second mirror 50 is schematized at the time of movement.

4, the second mirror 50 can move to the ZPD position, the image upper position, the image stop position, the image lower end position, or the parking position according to the movement of the link member 107. [

The ZPD position is a position for initiating the image height adjustment of the head-up display device 1 to a position where the link member 107 contacts the stopper 120. [

The image upper position is a position at which the image height of the head-up display device 1 is projected onto the upper end (upper side) of the windshield 70.

The video interruption position is a position at which the image height of the head-up display device 1 is projected to the middle (middle) of the windshield 70. [

The lower end position of the image is a position where the image height of the head-up display device 1 is projected to the lower end (lower side) of the windshield 70.

The parking position is set such that the second mirror 50 is rotated in a state in which the vehicle is not in a traveling condition in order to prevent light from being condensed on the image output unit 20 and the backlight unit 30 by external sunlight, So that the sunlight does not reach the video output unit 20 and the backlight unit 30.

Next, when the image height initialization (ZPD) of the head-up display device 1 is performed, the internal limit switch is deleted and the logic is improved so that the stress and operation sound of the stopper 120 generated in the initialization (ZPD) A control technique that can be minimized will be described with reference to FIG.

FIG. 5 is a block diagram illustrating an image height initialization control of a head-up display apparatus according to an exemplary embodiment of the present invention.

5, the head-up display apparatus 1 further includes a control unit 150, a current detection unit 160, a storage unit 170, and a switch 180 in addition to the configurations shown in FIGS.

The control unit 150 is a microprocessor for controlling various operations of the head-up display apparatus 1, and can control the operation of various modules, devices and the like built in the head-up display apparatus 1. [ According to one embodiment, the control unit 150 can be operated by one or more processors incorporated in the head-up display apparatus 1 and can control various modules, devices, etc., A control signal can be generated to control the operation of each of the above-described components.

The control unit 150 is connected to the motor 105 included in the position adjustment unit 100 to control the stop and operation of the motor 105 and the rotation direction and speed of the motor 105. [

The controller 150 controls the motor 105 to move the position of the second mirror 50 in order to perform the initialization of the image height (ZPD) of the head-up display device 1 when the battery power is turned on .

The controller 150 performs SOFT ZPD in normal operation according to a signal input from the current detector 160, and performs HARD ZPD when rotation of the motor 105 due to an external force is detected. SOFT ZPD and HARD ZPD will be described later with reference to FIG. 6A.

The control unit 150 is connected to the image output unit 20 and receives the position information of the second mirror 50 to control the brightness and blinking repetition period of the backlight unit 30. [

The control unit 150 may control the video output of the head-up display device 1 and adjust the image height of the head-up display device 1 according to a command signal input from the switch 180.

The current detector 160 detects the electromotive force generated when the motor 105 is rotated by the external force after the initialization of the image height of the head-up display device 1 (ZPD), and transmits the electromotive force to the controller 150.

The storage unit 170 stores various kinds of position information necessary for the operation of the head-up display apparatus 1. [ That is, the storage unit 170 stores the rotation value for the image height position of the head-up display device 1, the rotation value for reaching the stopper 120 position, the rotation value for reaching the parking position, And can store the head-up display image height initialization (ZPD) success flag.

In addition, the storage unit 170 stores a control program for controlling the head-up display device 1 and control data for controlling the operation of the head-up display device 1, a second mirror (not shown) 50), operation data generated while the head-up display device 1 performs a predetermined operation, and the like.

The storage unit 170 may be a flash memory, a hard disc, a card type memory (e.g., SD or XD memory), a random access memory (RAM), a static random access (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and an optical disk .

The switch 180 is an ignition switch which is turned on / off for video output of the head-up display device 1 and can be used as an adjustment switch operated by the driver to adjust the image height of the head-up display device 1.

A top adjustment command for moving the image height of the head-up display device 1 to the upper (upper) position, a stop adjustment command for moving the image height to the middle (stop) position, The lower adjustment command for shifting the lower adjustment command to the lower adjustment command.

As described above, the video output of the head-up display device 1 and the image height can be adjusted through the operation of the switch 180. [

Hereinafter, a head-up display device and its image height initialization control method according to an embodiment of the present invention will be described.

6A and 6B are operation flowcharts illustrating a first algorithm for controlling initialization of an image height in a head-up display apparatus according to an exemplary embodiment of the present invention.

6A and 6B, when battery power is turned on 200, the controller 150 determines whether a head-up display image height initialization (ZPD) success flag is stored in the storage unit 170 (202).

If it is determined in step 202 that the head-up display image height initialization (ZPD) success flag is not checked, the controller 150 rotates the motor 105 to move the position of the second mirror 50 to the initialization position 204).

When the motor 105 is rotated, the gear 106 meshed with the motor 105 is rotated, and the link member 107 is linearly moved in the longitudinal direction of the gear 106. As the link member 107 moves linearly, the second mirror 50 rotates about the rotation axis, and the position of the second mirror 50 starts to move.

As described above, when the position of the second mirror 50 is moved, the link member 107 is brought into contact with the stopper 120 in accordance with the linear movement of the link member 107 (206).

At this time, the control unit 150 further rotates the motor 105 even if the link member 107 contacts the stopper 120 (208). This is because the head-up display apparatus 1 of the present invention further rotates more than the original movement amount of the motor 105 so that the link member 107 can reliably contact the stopper 120 because there is no limit switch.

In this way, when the ZPD success flag is not checked in the absence of the limit switch, the HARD ZPD (corresponding to steps 204 to 208 of FIG. 6A) is added to the logic that further rotates the motor 105 to reliably touch the stopper 120. [ Quot;

The control unit 150 stops the rotation of the motor 105 because the link member 107 can not physically move by the stopper 120 when the motor 105 is further rotated to touch the stopper 120 with certainty (210).

When the motor 105 is stopped, the control unit 150 rotates the motor 105 in the opposite direction (212) and counts the rotation of the motor 105 (214).

Next, the controller 150 compares the rotation value of the motor 105 counted with the rotation value stored in the storage unit 170 to determine whether the height of the head-up display image has been reached (216). In the storage unit 170, a rotation value for each image height position of the second mirror 50 is stored in advance.

If it is determined in step 216 that the height of the head-up display image has not been reached, the controller 150 feeds back to step 212 to continue rotating the motor 105 in the opposite direction to continue the subsequent operation.

On the other hand, if it is determined in step 216 that the head-up display image height has been reached, the controller 150 stops the rotation of the motor 105 (step 218).

Next, the controller 150 determines whether the switch 180 is turned on 220 and outputs the image of the head-up display device 1 when the switch 180 is turned on.

In addition, the controller 150 determines whether the driver adjusts the image height in a state in which the image of the head-up display device 1 is output (224).

As a result of the determination in step 224, when the driver adjusts the image height, the controller 150 rotates the motor 105 to move the second mirror 50 to the adjusted image height, To the storage unit 170 (226).

Then, the controller 150 determines whether the switch 180 is turned off and is in a communication sleep state (SLEEP) (228).

If the switch 180 is turned off in step 228, the controller 150 counts the rotation of the motor 105 while rotating the motor 105 to move the position of the second mirror 50 to the parking position 230).

The control unit 150 compares the calculated rotation value of the motor 105 with the rotation value of the parking position stored in the storage unit 170 to determine whether the parking position has been reached (232). In the storage unit 170, the parking position rotation value of the second mirror 50 is stored in advance.

As a result of the determination in step 232, if the parking position is not reached, the controller 150 feeds back to step 230, rotates the motor 105, and repeats the subsequent operation while counting the rotation of the motor 105.

On the other hand, if it is determined in step 232 that the parking position has been reached, the control unit 150 stops the rotation of the motor 105 (step 234).

Next, the controller 150 stores the head-up display image height initialization (ZPD) success flag in the storage unit 170 (236), and then performs SOFT ZPD in the ZPD condition.

If it is determined in step 202 that the head-up display image height initialization (ZPD) success flag is checked, the controller 150 sets the position of the second mirror 50 to the position of the stopper 120 stored in the storage unit 170 The rotation of the motor 105 is counted while the motor 105 is rotated to move (240).

The control unit 150 compares the rotation value of the motor 105 counted with the rotation value of the stopper 120 stored in the storage unit 170 and determines whether the stopper 120 has reached the position of the stopper 120 in operation 242. The rotation value of the position of the stopper 120 of the second mirror 50 is stored in the storage unit 170 in advance.

As a result of the determination in step 242, if the stopper 120 is not reached, the controller 150 feeds back to step 240 to rotate the motor 105, and repeats the subsequent operation while counting the rotation of the motor 105.

When the ZPD success flag is checked in the absence of the limit switch, the logic for rotating the motor 105 to the position of the stopper 120 is referred to as SOFT ZPD (corresponding to steps 240 to 242 in FIG. 6A).

On the other hand, if it is determined in step 242 that the stopper 120 has reached the stop position, the controller 150 proceeds to step 210 to stop the rotation of the motor 105.

Therefore, the head-up display device 1 according to the embodiment of the present invention can perform the image height initialization control having the same performance as that of the existing limit switch system using the HARD ZPD without the limit switch.

Next, the process of controlling the image height initialization (ZPD) when the position of the second mirror 50 is moved by the external force in the state where the motor 105 is stopped after the image height initialization (ZPD) .

7 is an operation flowchart illustrating a second algorithm for controlling the initialization of the image height in the head-up display apparatus according to an embodiment of the present invention.

7, in a state where the motor 105 is stopped (300), the controller 150 determines whether an external force is generated in the second mirror 50 (302).

When an external force is generated in the second mirror 50, the position of the second mirror 50 is moved by the external force. When the position of the second mirror 50 is moved because the link member 107, the gear 106 and the motor 105 are connected to the second mirror 50, the motor 105 also rotates (304) .

At this time, an electromotive force is generated 306 according to the rotation of the motor 105, and the generated electromotive force is detected by the current detector 160 and transmitted to the controller 150.

Accordingly, the controller 150 receives a signal indicative of the generation of the electromotive force from the current detector 160 in step 308, and the controller 150 determines that the second mirror 50 has been moved and processes the event signal in step 310.

Next, the controller 150 determines whether the battery is powered on and the communication wake-up is performed (312).

If it is determined in step 312 that the battery is not powered on, the controller 150 returns to step 300 and proceeds to the next operation in a state where the motor 105 is stopped.

On the other hand, if it is determined in step 312 that the battery is powered on, the controller 150 performs HARD ZPD corresponding to steps 204 to 208 shown in FIG. 6A (step 314).

Next, the control unit 150 performs HARD ZPD to stop the motor 105 (316) as the link member 107 reaches the stopper 120, proceeds to step 212 shown in FIG. 6A, .

If it is determined in step 302 that no external force is generated in the second mirror 50, the controller 150 determines whether the battery is powered on and wakes up.

If it is determined in step 320 that the battery power is not turned on, the controller 150 feeds back to step 300 and proceeds to the subsequent operation while the motor 105 is stopped.

On the other hand, if it is determined in step 320 that the battery is powered on, the controller 150 performs SOFT ZPD corresponding to steps 240 to 242 shown in FIG. 6A (step 322) do.

As described above, the head-up display device 1 of the present invention conducts the HARD ZPD when the rotation of the motor 105 due to the external force is detected while performing SOFT ZPD in normal operation. Therefore, the head-up display image height initialization (ZPD) can be stably controlled even in a malicious situation in which the position of the second mirror 50 is moved by an external force.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed methods should be considered in an illustrative rather than a restrictive sense. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

1: head up display device 10: housing part
20: video output unit 40: first mirror
50: second mirror 51: rotating shaft
70: Windshield 100: Position adjusting section
105: motor 106: gear
107: link member 120: stopper
150: control unit 160: current detection unit
170: storage unit 180: switch

Claims (20)

A housing part mounted on the vehicle;
An image output unit built in the housing unit and outputting an image;
A first mirror for magnifying and reflecting an image output from the image output unit;
A second mirror for retroreflecting the image reflected by the first mirror and projecting it onto the windshield;
And a position adjusting unit for adjusting a height of an image projected on the windshield by moving the position of the second mirror,
Wherein the position adjusting unit comprises:
motor;
A gear rotated by the motor;
A link member linearly moved along the longitudinal direction of the gear to rotate the second mirror when the gear rotates;
Further comprising a stopper for restricting a moving section of the link member. The method according to claim 1,
The stopper
Up display image height initialization (ZPD) to said link member. 3. The method of claim 2,
Further comprising a control unit for controlling the motor,
Wherein,
And controls the rotation of the motor for the head-up display image height initialization (ZPD) when the battery power is turned on. The method of claim 3,
Wherein,
And controls the rotation of the motor so that the link member is brought into contact with the stopper so that the second mirror is moved to the stopper position. 5. The method of claim 4,
And a storage unit for storing the head-up display image height initialization (ZPD) success flag,
Wherein,
And controlling the head-up display image height initialization by checking the flag. 6. The method of claim 5,
Wherein,
If the flag is not checked, the motor is rotated to bring the link member into contact with the stopper;
Further rotates the motor to bring the link member into contact with the stopper again;
Further comprising stopping the rotation of the motor when the link member contacts the stopper, thereby controlling the head-up display image height initialization (ZPD). 6. The method of claim 5,
Wherein,
If the flag is checked, the motor is rotated to move the second mirror to the stopper position;
Counting the rotation of the motor to determine whether the second mirror has reached the stopper position;
Further comprising stopping the rotation of the motor when the second mirror reaches the stopper position, thereby controlling the head-up display image height initialization (ZPD). 5. The method of claim 4,
Further comprising a switch for on / off operation by a driver for outputting a video image of the head-up display device,
Wherein,
And controls the rotation of the motor so that the second mirror reaches a parking position when the switch is turned off. 9. The method of claim 8,
Further comprising a storage unit for storing a rotation value of the head-up display image height position, a stopper position rotation value, and a parking position rotation value,
Wherein,
And controls rotation, stop and rotation directions of the motor using the stored rotation values. 5. The method of claim 4,
Further comprising a current detector for detecting an electromotive force generated at the time of rotation of the motor and transmitting the detected electromotive force to the controller,
Wherein,
And controls the head-up display image height initialization (ZPD) according to a signal input from the current detector. 11. The method of claim 10,
Wherein,
And when the signal is inputted from the current detection unit, the motor is rotated to bring the link member into contact with the stopper;
Further rotates the motor to bring the link member into contact with the stopper again;
Further comprising stopping the rotation of the motor when the link member contacts the stopper, thereby controlling the head-up display image height initialization (ZPD). A housing part mounted on the vehicle;
An image output unit built in the housing unit and outputting an image;
A first mirror for magnifying and reflecting an image output from the image output unit;
A second mirror for retroreflecting the image reflected by the first mirror and projecting it onto the windshield;
And a position adjusting unit for adjusting a height of an image projected on the windshield by moving the position of the second mirror,
Wherein the position adjusting unit comprises:
motor;
A gear rotated by the motor;
A link member linearly moved along the longitudinal direction of the gear to rotate the second mirror when the gear rotates;
Further comprising a stopper for restricting a moving section of the link member,
A current detector for detecting an electromotive force generated when the motor rotates;
And a controller for controlling the head-up display image height initialization (ZPD) by controlling rotation of the motor in accordance with a signal input from the current detector. 13. The method of claim 12,
Wherein,
And when the signal is inputted from the current detection unit, the motor is rotated to bring the link member into contact with the stopper;
Further rotates the motor to bring the link member into contact with the stopper again;
Further comprising stopping the rotation of the motor when the link member contacts the stopper, thereby controlling the head-up display image height initialization (ZPD). 13. The method of claim 12,
Wherein,
And controls the rotation of the motor so that the link member is brought into contact with the stopper so that the second mirror is moved to the stopper position. A mirror that rotates to adjust the height of an image projected on the windshield, and a motor that is connected to a gear rotated by the motor to detect a position of the mirror And a stopper for removing a moving section of the link member, the method comprising the steps of:
Checking the head-up display image height initialization (ZPD) success flag;
If the flag is not checked, the motor is rotated to bring the link member into contact with the stopper;
Further rotates the motor to bring the link member into contact with the stopper again;
Up display image height is initialized by stopping the rotation of the motor when the link member is in contact with the stopper. 16. The method of claim 15,
If the flag is checked, the motor is rotated to move the mirror to the stopper position;
Counting the rotation of the motor to determine whether the mirror has reached the stopper position;
And initializing the head-up display image height by stopping the rotation of the motor when the mirror reaches the stopper position. 16. The method of claim 15,
Further comprising determining whether battery power is turned on,
And initializing the head-up display image height when the battery power is turned on. 16. The method of claim 15,
Detecting an electromotive force generated during rotation of the motor through a current detector;
When a signal is inputted from the current detector, it is determined whether battery power is on;
When the battery is powered on, the motor is rotated to bring the link member into contact with the stopper;
Further rotates the motor to bring the link member into contact with the stopper again;
Further comprising: stopping rotation of the motor when the link member is in contact with the stopper, wherein the initialization of the head-up display image height is performed. 17. The method of claim 16,
Further comprising storing a rotation value, a stopper position rotation value, and a parking position rotation value for each head-up display image height position,
Performing the head-up display image height initialization may include:
And controlling rotation, stop and rotation directions of the motor using the stored rotation values. A mirror that rotates to adjust the height of an image projected on the windshield, and a motor that is connected to a gear rotated by the motor to detect a position of the mirror And a stopper for removing a moving section of the link member, the method comprising the steps of:
Determining whether an external force is generated in the second canceling force in the stopped state of the motor;
Detecting an electromotive force generated at the time of rotation of the motor through the current detector when the external force is generated;
When a signal is inputted from the current detector, it is determined whether battery power is on;
When the battery is powered on, the motor is rotated to bring the link member into contact with the stopper;
Further rotates the motor to bring the link member into contact with the stopper again;
And stopping the rotation of the motor when the link member is in contact with the stopper, wherein the initialization of the head-up display image height is performed.

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