KR20180030307A - Apparatus for detecting height of eye for head up display - Google Patents

Abstract

An apparatus and a method for detecting the height of eyes of a head-up display are disclosed. According to the present invention, the apparatus for detecting the height of eyes of a head-up display comprises: a head-up display unit; and a height-of-eyes detection unit for expressing a preset screen through the head-up display unit, and detecting the height of eyes of a driver by using a distance to a reference point selected in the screen for each position of a vehicle, and the height on a screen of the reference point.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an eye height detecting apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus and method for detecting an eye height of a head-up display, and more particularly, to an apparatus and method for detecting an eye height of a head-up display for real-

The Head-Up Display (HUD) projects the contents to the vehicle's windshield so that the driver can see the projected information while looking ahead.

Recently, studies are being conducted to display specific information in the form of augmented reality through head-up display.

Augmented Reality (AR) is a technology that superimposes three-dimensional virtual objects on the real world seen by the user. It shows the virtual worlds with additional information in the real world as a single image. Therefore, Mixed Reality , MR).

The background art of the present invention is disclosed in 'Vehicle Augmented Reality Display System and Vehicle Augmented Reality Display Method' of Korean Registered Patent No. 10-1544524 (May 2015.08.07).

Conventionally, in order to implement an augmented reality, a driver's eye height is tracked in real time to calculate a viewing angle. In this method, an additional device such as a camera is required to track the position of a pupil in real time, And increased system complexity.

An object of the present invention is to provide an apparatus and method for detecting an eye height of a head-up display in which an eye height of a driver can be easily detected and set on a head-up display, .

An apparatus for detecting an eye height of a head-up display according to an aspect of the present invention includes: a head-up display; And an eye height detector for detecting a driver's eye height using a distance from the reference point to a selected reference point within the screen and a height of the reference point on the screen for each vehicle position, .

In the present invention, the reference point is selected through a cursor in the screen.

The present invention further includes a moving distance measuring unit for measuring a moving distance of the vehicle, wherein the eye height detecting unit detects a distance to the reference point according to the moving distance measured by the moving distance measuring unit, And the height is detected.

In the present invention, the eye height detecting unit detects the eye height of the driver using the ratio of the distance to the reference point for each vehicle position to the height of the reference point on the screen.

In the present invention, the eye height detecting unit may change the distance to the reference point by subtracting the moving distance of the vehicle from the distance to the reference point every time the moving distance of the vehicle is measured by the moving distance measuring unit .

The present invention further includes a tilt detector for detecting a tilt of the vehicle, wherein the eye height detector detects the tilt of the vehicle when the inclination of the vehicle detected by the tilt detector is less than a predetermined set slope, .

In the present invention, it is preferable that the vehicle further includes a tilt warning unit for warning that the vehicle is relatively much tilted, wherein the eye height detecting unit detects a tilt of the vehicle through the warning unit when the tilt of the vehicle detected by the tilt detecting unit exceeds a predetermined setting slope So as to guide the vehicle position change.

In the present invention, the screen may include a boundary line of an area that can be displayed through the head-up display unit.

According to an aspect of the present invention, there is provided a method of detecting an eye height of a head-up display, the method including: displaying a predetermined screen through a head-up display unit; Collecting a plurality of distances from the eye height detection unit to a selected reference point in the screen and a height on the screen of the reference point for each vehicle position; And detecting an eye height of the driver by using the distance between the eye height detecting unit and the reference point collected for each vehicle position and the height of the reference point on the screen.

In the present invention, the reference point is selected through a cursor in the screen.

In the present invention, the eye height detection unit calculates the height of the reference point on the screen with respect to the distance to the reference point for each vehicle position.

In the present invention, the eye height detecting unit changes the distance to the reference point by subtracting the moving distance of the vehicle from the distance to the reference point every time the moving distance of the vehicle is measured by the moving distance measuring unit .

In the present invention, the eye height detecting unit controls the head up display unit to display the screen if the inclination of the vehicle detected by the inclination detecting unit is less than a predetermined set inclination.

In the present invention, when the inclination of the vehicle detected by the inclination detecting section exceeds a predetermined set inclination, the eye height detecting section alerts the inclination of the vehicle through the warning section to guide the vehicle position change .

An apparatus and method for detecting an eye height of a head-up display according to an aspect of the present invention allow a driver to easily set his / her eye height to display augmented reality contents.

An apparatus and method for detecting an eye height of a head-up display according to an aspect of the present invention may reduce the manufacturing cost of the head-up display and reduce system complexity, since no additional apparatus for tracking the eye height of the driver is required.

1 is a block diagram of an apparatus for detecting an eye height of a head-up display according to an embodiment of the present invention.
2 is a diagram illustrating a border and a cursor in the eye height setting mode according to an embodiment of the present invention.
3 is a view showing an example of selecting a reference point before moving the vehicle according to an embodiment of the present invention.
4 is a view showing an example of selecting a reference point after moving a vehicle according to an embodiment of the present invention.
5 is a view showing the distance to a reference point before moving the vehicle and the height of a reference point in the screen according to an embodiment of the present invention.
FIG. 6 is a view showing the distance to a reference point and the height of a reference point in a screen after moving the vehicle according to an embodiment of the present invention.
7 is a flowchart of an eye height detection method of a head-up display according to an embodiment of the present invention.

Hereinafter, an eye height detecting apparatus and method of a head-up display according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. Further, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the user, the intention or custom of the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a block diagram of an apparatus for detecting an eye height of a head-up display according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a border and a cursor in the eye height setting mode according to an embodiment of the present invention, FIG. 3 is a view showing an example of selecting a reference point before moving a vehicle according to an embodiment of the present invention, FIG. 4 is a view showing an example of selecting a reference point after moving a vehicle according to an embodiment of the present invention, FIG. 6 is a view showing a distance to a reference point before moving the vehicle and a height of a reference point in a screen according to an embodiment of the present invention. Fig. 8 is a view showing the height of a reference point within a reference point.

Referring to FIG. 1, an apparatus for detecting an eye height of a head-up display according to an embodiment of the present invention includes a key input unit 10, a movement distance measurement unit 20, a tilt sensing unit 30, a head up display unit 40 A warning unit 50, and an eye height detection unit 60. [

The key input unit 10 inputs a control command to the eye height detection unit 60 according to the operation of the driver. The key input unit 10 may include various types of input devices such as a jog dial, a direction key, a touch screen, a mechanical button, or the like, and may be any device capable of providing a user interface provided in a vehicle.

The user inputs a command to enter the driver's eye height detection mode through the key input unit 10 or inputs a specific object or the like in the screen 70 displayed through the head up display unit 40 A reference point selection command or the like to be selected can be input to the eye height detection unit 60. [

In this case, when an instruction to enter the driver's eye height detection mode is inputted, the eye height detector 60 enters the operation eye height detection mode and controls the head up display unit 40 at this time to detect the augmented reality contents A boundary line 80 and a cursor 90 for the region where the displayable region can be displayed.

Then, the eye height detection unit 60 selects a reference point in the boundary line 80 in accordance with the reference point selection command. This will be described later.

The moving distance measuring unit 20 measures the moving distance of the vehicle. The moving distance measuring unit 20 can detect the moving distance of the vehicle based on the number of revolutions or the position of the wheel of the vehicle.

The tilt sensing unit 30 senses the inclination of the vehicle.

The warning unit 50 warns that the vehicle is relatively inclined. That is, when the ground is inclined and the inclination of the vehicle exceeds the set inclination, the warning unit 50 warns the driver of the inclination of the vehicle in accordance with the control signal of the eye height detecting unit 60, Guide the change of the vehicle position to a point below the set slope.

The head-up display unit 40 displays images for providing various kinds of convenience information to the driver, and displays various images according to the traveling state of the vehicle in the windshield of the vehicle.

That is, the head-up display unit 40 displays a virtual image on the windshield in front of the driver. In this case, the driver recognizes that the information necessary for driving is displayed together with the actual object.

The head-up display unit 40 includes a position adjusting device (not shown) for controlling the position of the image. The position adjuster adjusts the position of the image displayed on the windshield according to the eye height of the detected driver.

The position adjusting device may include an apparatus for adjusting the position of an image displayed on the windshield such as an aspherical mirror, a plane mirror, a motor, an angle adjuster, and the like.

In particular, the head-up display unit 40 displays the boundary line 80 and the cursor 90 on the windshield in response to the control signal of the eye height detection unit 60. [

Referring to FIG. 2, a boundary line 80 indicates an area capable of image display through the head-up display unit 40.

The cursor 90 is a pointer that moves in accordance with the control command of the driver in the area. The cursor 90 is located inside the boundary line 80 described above. Accordingly, the user can operate the key input unit 10 to move the cursor 90 within the boundary line 80, and in this case, a point of a specific object or point within the boundary line 80 can be selected. An object that can be selected through the cursor 90 may include a parking line, a road marking, a bottom surface of a three-dimensional object, and the like. On the other hand, the point selected by the driver becomes the reference point for detecting the driver's eye height.

Referring to FIG. 3, not only part of the parking line is included in the boundary line 80 but also the cursor 90 is freely movable up, down, left, and right within the boundary line 80.

In this case, the user can operate the key input unit 10 to select any one point in the parking line as the reference point P.

In addition, the user moves the vehicle within the range in which the reference point P is still included in the boundary line 80. In this case, the user operates the key input unit 10 to select the same The reference point P can be selected again. This process can be performed a plurality of times.

That is, the user selects one point in the boundary line 80 as the reference point P, and repeats the process of selecting the reference point P again at a position different in distance from the reference point P, A plurality of distances from the reference point P to the reference point P can be obtained. In this process, the moving distance measuring unit 20 measures the moving distance each time the vehicle moves, and inputs the moving distance to the eye height detecting unit 60.

On the other hand, when the distance to the reference point P is detected as described above, the height of the eye point detector 60 is set such that the height of the reference point P on the screen 70 with respect to the distance to the reference point P is .

Here, the distance to the reference point P is the horizontal distance from the driver's position to the actual point selected as the reference point P, which is unknown. This will be described later.

The distance to the reference point P is a sum of the distance from the driver's position to the screen 70 and the distance from the screen 70 to the actual point. In this case, the distance from the driver's position to the screen 70 is set in advance, and the distance from the screen 70 to the actual point can be calculated through a separate calculation process. This will be described later.

The height of the reference point P on the screen 70 is a height at which the reference point P is viewed on the screen 70 when the driver views the screen 70, .

Typically, the head-up display unit 40 is fixed at a predetermined height inside the vehicle and displays the screen 70 in a specific area of the windshield.

Also, the driver's eye height does not change significantly during operation. 5 and 6, the height of the reference point P on the screen 70 is the same as the reference point P in the screen 70, Depending on the distance.

In this case, the screen 70 can be displayed only in a predetermined area through the head-up display unit 40, and the height of the reference point P on the screen 70 can be set in advance. That is, the height of the reference point P on the screen 70 can be set in advance to each position in the screen 70.

As shown in FIG. 3, when the user selects the reference point P before moving the vehicle, the distance to the reference point P is calculated from the distance from the driver's position to the screen 70 (X) from the distance (d) to the actual point from the screen (70). The actual point is a point corresponding to the reference point P selected by the cursor 90 by the driver.

Here, since the eye height h of the driver does not change largely in practice, the constant h is used.

4, when the user selects the corresponding reference point P after moving the vehicle, the distance to the reference point P is determined by the distance between the screen 70 before the vehicle is moved (Xb) obtained by subtracting the moving distance (b) of the vehicle from the distance (x) from the actual point to the actual point.

Further, as the vehicle moves, the distance of the reference point P on the screen 70 also changes. The height of the reference point P on the screen 70 is set for each position in the screen 70 as described above and is detected according to the position of the reference point P on the screen 70.

For reference, the height of the reference point P on the screen 70 becomes lower as the distance from the reference point P approaches.

The eye height detection unit 60 detects the distance from the reference point P before the vehicle is moved to the reference point P on the screen 70 as described above, When the distance to the point P and the height of the reference point P on the screen 70 are detected, the height of the driver's eye is detected using the distance.

Since the eye height of the driver is virtually unchanged as described above, it can be defined as a fixed value. On the other hand, the distance to the reference point P and the height of the reference point P on the screen 70 vary depending on the vehicle position, and the height of the reference point P on the screen 70 is the reference point P, The distance is changed proportionally.

The ratio of the distance to the reference point P before the vehicle is moved to the height of the reference point P on the screen 70 is determined by the distance from the reference point P to the reference point P P on the screen 70 of the display device.

Thus, the eye height detecting section 60 detects the eye height of the driver based on the following expression (1).

Here, h is the height of the driver's eye, d is the distance from the driver's eye height to the screen 70, h ₁ is the height of the reference point P before the vehicle movement on the screen 70, , B is a moving distance of the vehicle, and h ₂ is a height of the reference point P on the screen 70 after the vehicle is moved.

In Equation (1), the number of equations is two and the number of unknowns is two (x, h), and the eye height (h) of the driver can be calculated based on these simultaneous equations.

On the other hand, if the eye height of the driver is detected as described above, the eye height detector 60 extracts a perspective view parameter for matching the reality with the head-up display unit 40 on the basis of the eye height of the driver And displays the screen based on the real matching parameter.

Hereinafter, an eye height detection method of a head-up display according to an embodiment of the present invention will be described with reference to FIG.

7 is a flowchart of an eye height detection method of a head-up display according to an embodiment of the present invention.

Referring to FIG. 7, when an instruction to enter the driver's eye height detection mode is input from the key input unit 10, the eye height detection unit 60 enters the driver's eye height setting mode (S10).

Next, the eye height detector 60 controls the tilt sensor 30 to detect the inclination of the vehicle (S20), and determines whether the inclination of the detected vehicle is equal to or less than a preset inclination (S30).

If the inclination of the vehicle exceeds the set inclination as a result of the determination in step S30, the eye height detection unit 60 warns that the vehicle is relatively much tilted through the warning unit 50 and changes the vehicle position to the driver (S40).

On the other hand, if it is determined in step S30 that the slope of the vehicle is less than the set slope, the eye height detecting unit 60 controls the head up display unit 40 to display the boundary line 80 in the area where the screen display on the windshield is possible. And the cursor 90 are displayed (S50).

In this case, the user can operate the key input unit 10 to move the cursor 90 within the boundary line 80. In this case, the reference point P can be selected as a specific object or point within the boundary line 80 .

Accordingly, the eye height detector 60 selects a position within the screen 70 selected by the user as the reference point P (S60).

Meanwhile, the user moves the vehicle within the range where the reference point P is still included in the boundary line 80, and the moving distance measuring unit 20 measures the moving distance of the vehicle (S70).

At this time, the eye height detecting unit 60 detects the distance from the reference point P before moving the vehicle and the height of the reference point P on the screen 70 as described above.

Thereafter, the user operates the key input unit 10 to select a reference point P at the same point in the screen 70, and the eye height detection unit 60 detects a position in the screen 70 selected by the user as a reference point P (P) (S80).

At this time, the eye height detector 60 detects the distance from the reference point P to the reference point P after the vehicle is moved, and the height of the reference point P on the screen 70, (S90).

In this case, the eye height detector 60 repeatedly performs the above-described process to determine whether the preset number of times has been reached, and returns to step S70 according to the determination result to repeat the above-described process. Based on this, it is possible to detect the distance from the plurality of vehicle positions to the reference point P and the height of the reference point P on the screen 70.

That is, the user moves the vehicle within a range in which the reference point P is positioned inside the boundary line 80, and in this process, the distance from the reference point P to the reference point P By repeatedly selecting the point P, a plurality of distances to the reference point P can be obtained.

At this time, the moving distance measuring unit 20 measures the moving distance each time the vehicle moves, and inputs the measured distance to the eye height detecting unit 60.

Thus, by detecting the distance from the plurality of vehicle positions to the reference point P and the height of the reference point P on the screen 70, the accuracy with respect to the eye height of the driver can be further improved.

For reference, in the present embodiment, the distance from the reference point P to the reference point P is detected before and after the vehicle moves once, and the distance from the reference point P to the reference point P The detection of the height on the screen 70 will be described as an example.

In this case, since the eye height of the driver is substantially unchanged as described above, it can be defined as a fixed value. On the other hand, the distance to the reference point P and the height of the reference point P on the screen 70 vary depending on the vehicle position, and the height of the reference point P on the screen 70 is the reference point P, The distance is changed proportionally. The ratio of the distance to the reference point P before the vehicle is moved to the height of the reference point P on the screen 70 is determined by the distance from the reference point P to the reference point P P on the screen 70 of the display device.

The eye height detection unit 60 detects the eye height of the driver by using the distance from the reference position P to the selected reference point P in the screen 70 and the height of the reference point P on the screen 70 do.

In this case, the eye height detection unit 60 calculates the distance from the reference point P to the reference point P before moving the vehicle, the height of the reference point P on the screen 70, And the height of the reference point P on the screen 70 is detected, the height of the driver's eye is detected using the detected distance.

Then, the eye height detector 60 determines the screen position of the windshield based on the detected eye height of the driver, extracts and stores real matching parameters for forming a perspective view on the screen position (S100).

As described above, the apparatus and method for detecting an eye height of a head-up display according to an embodiment of the present invention allow a driver to easily set his / her eye height to display the augmented reality contents.

In addition, an apparatus and method for detecting eye height of a head-up display according to an embodiment of the present invention may reduce manufacturing cost and system complexity of a head-up display since additional apparatus for tracking an eye height of a driver is not required .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Accordingly, the true scope of the present invention should be determined by the following claims.

10:
20: Moving distance measuring unit
30: tilt detection unit
40: Head-up display section
50: Warning section
60: eye height detector
70: Screen
80: Borderline
90: Cursor

Claims (14)

A head up display; And
And an eye height detector for detecting a driver's eye height based on the distance from the selected reference point to the selected reference point within the screen and the height of the reference point on the screen for each vehicle position, Eye height of the head-up display.
The apparatus of claim 1, wherein the reference point is selected through a cursor in the screen.
2. The apparatus according to claim 1, further comprising a movement distance measuring unit for measuring a movement distance of the vehicle, wherein the eye height detecting unit detects a distance to the reference point according to the movement distance measured by the movement distance measuring unit, And detects the height of each of the eyes on the screen.
4. The head-up display according to claim 3, wherein the eye height detecting unit detects the eye height of the driver by using a ratio of a distance to the reference point for each vehicle position to a height of the reference point on the screen Eye height detection device.
4. The apparatus according to claim 3, wherein the eye height detecting unit changes the distance to the reference point by subtracting the moving distance of the vehicle from the distance to the reference point each time the moving distance of the vehicle is measured by the moving distance measuring unit And the eye height of the head-up display.
The apparatus according to claim 1, further comprising a tilt detection unit for detecting a tilt of the vehicle, wherein the eye height detection unit controls the head up display unit when the inclination of the vehicle detected by the tilt detection unit is less than a predetermined set inclination, In the head-up display.
7. The apparatus of claim 6, further comprising a warning unit for warning that the vehicle is relatively much tilted, wherein the eye height detection unit is configured to detect, when the inclination of the vehicle detected by the inclination detection unit exceeds a predetermined setting inclination, And warning of the inclination of the vehicle to guide the change of the vehicle position.
The apparatus of claim 1, wherein the screen includes a boundary of an area that can be displayed through the head-up display unit.
The eye height detection unit displaying a predetermined screen through the head up display unit;
Collecting a plurality of distances from the eye height detection unit to a selected reference point in the screen and a height on the screen of the reference point for each vehicle position; And
And detecting an eye height of the driver using the distance from the eye height detector to the reference point collected for each vehicle position and the height of the reference point on the screen.
10. The method of claim 9, wherein the reference point is selected through a cursor in the screen.
10. The method as claimed in claim 9, wherein the eye height detecting unit calculates a height of the reference point on the screen with respect to a distance to the reference point for each vehicle position.
The apparatus according to claim 9, wherein the eye height detecting unit changes the distance to the reference point by subtracting the moving distance of the vehicle from the distance to the reference point each time the moving distance of the vehicle is measured by the moving distance measuring unit Wherein the head height of the head-up display is determined based on the detected height.
10. The head-up display according to claim 9, wherein the eye-height detecting unit controls the head-up display unit to display the screen if the inclination of the vehicle detected by the tilt detecting unit is less than a predetermined set inclination Way.
14. The method according to claim 13, further comprising the step of, when the inclination of the vehicle detected by the inclination detecting section exceeds a preset inclination, warning the inclination of the vehicle through the warning section to guide the vehicle position change Wherein the head height of the head-up display is determined based on the detected height.

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