KR101642747B1

KR101642747B1 - Apparatus and method for head up display

Info

Publication number: KR101642747B1
Application number: KR1020150160432A
Authority: KR
Inventors: 문병섭; 박범진; 강원의
Original assignee: 한국건설기술연구원
Priority date: 2015-11-16
Filing date: 2015-11-16
Publication date: 2016-07-26

Abstract

The present invention relates to an apparatus for a head-up display for a large vehicle having a front windshield of an angle of 70 degrees or higher with respect to a horizontal plane. The apparatus for a head-up display comprises: a backlight unit to generate illumination light; a display panel to use the illumination light as a light source to output driving information; a first reflective mirror positioned in front of the display panel to reflect an image of the outputted driving information to 90° in the left direction; a first optical lens to densely focus a light density of the reflected image of the driving information to output a focused image to vividly magnify the reflected image of the driving information without a problem of image distortion and a double image while the reflected image of the driving information passes through a second optical lens, a third optical lens, and a fourth optical lens; a second reflective mirror positioned on the left side of the first reflective mirror to reflect the image whose size is adjusted to 90° in the left direction; the second optical lens to change a magnification of the image of the driving information reflected by the second reflective mirror to 100% or higher to output a magnified image; the third optical lens to transform the image of the driving information outputted by the second optical lens according to a curvature state of the front windshield in advance to output a transformed image; and the fourth optical lens to flatten the output image of the third optical lens and remove image distortion. The present invention can realize a technique for displaying driving information for a vehicle erected at 70 degrees or higher (e.g., a large vehicle such as a bus) and a vehicle having a front windshield of any angle (e.g., 5-90°).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a head-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video display apparatus for a vehicle, and more particularly, to a head-up display apparatus provided in a front window of a vehicle.

BACKGROUND ART [0002] In order to more effectively transmit driving information to a driver while a vehicle is running, researches on a next generation display device called a head-up display (HUD) are being actively conducted.

Generally, the HUD device displays vehicle information such as travel information, such as traveling speed, mileage, and engine speed (RPM), and fuel amount, through a front window such as a wind shield positioned forward , A device that provides information necessary for driving while minimizing the movement of the driver's gaze from the front to a dashboard equipped with a dashboard or the like.

The HUD was developed to reduce the burden on the pilot to look at the inside of the cockpit and see external references at the same time. Normally, during normal watch flight, the reference ratio of the external and internal instruments is maintained at about 8: 2. However, in the case of flight flight, almost 99% of them can only be seen outside. So, I projected various necessary information to the view of pilot.

Therefore, when the head-up display device is used, the driver can confirm information necessary for driving without distracting his / her eyes from the front, so that the risk of an accident is greatly reduced.

In recent years, with the development of future vehicles, as more information has been passed on to drivers, HUD has begun to be applied to automobiles. In particular, various vehicle displays including navigation are being studied as a means of replacing or complementing the vehicle display because the position of the screen is not in the front of the driver's field of view, which is inconvenient to use and may cause accidents.

1 is an exemplary view showing a conventional LCD type HUD device.

As shown in FIG. 1, a conventional LCD type HUD device includes a liquid crystal panel 10 and a backlight unit 20.

The liquid crystal panel 10 is installed inside an instrument panel in front of the driver's seat and displays an input "driving information image ".

The backlight unit 20 is installed at a rear side of the liquid crystal panel 10 and illuminates a rear surface of the liquid crystal panel 10 to provide a light source.

The HUD apparatus of the conventional LCD type includes an optical system 30 provided at a front side of the liquid crystal panel 10 and a plurality of reflectors provided at a predetermined angle in front of the optical system 30. [

The optical system 30 functions to enlarge or reduce the "travel information image" shown in the liquid crystal panel 10 to an appropriate size and adjust the focus.

The reflector 40 reflects the "travel information image" adjusted by the optical system 30 to the front window 50 of the vehicle. Thus, the "driving information image" can be displayed on the front window 50 of the vehicle.

The HUD device displays various kinds of running information on the front window 50, so that the driver can confirm the running information of the vehicle without directly viewing the instrument panel installed on the instrument panel. Further, it prevents unnecessary movement of the driver's eyes, and induces the driver to perform safe driving while observing only the place necessary for driving.

Such a conventional HUD (HUD) device of the LCD type is disclosed in Korean Patent Laid-Open Publication No. 10-0092954 (hereinafter referred to as "Prior Art").

In the case of the head-up display device according to the preceding document, the image outputted from the display panel 120 reaches the lens portion through the two reflecting mirrors, and the two optical lenses forming the lens portion correct the distortion of the arrived image (HUD) images.

However, the conventional head-up display device has the problem that the reflectance of the image is lowered due to the use of two reflectors, and the point of expressing the image using the two optical lenses has a problem that the viewing angle is limited I had.

Korean Patent Laid-Open No. 10-2012-0092954 (entitled: Head-Up Display Apparatus and Method)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a HUD device in which a traveling information image forms an image at a certain point of a space over a window glass surface in a front window of a vehicle at a vertical angle of 70 degrees or more.

It is another object of the present invention to provide a HUD device that allows a single image to be formed on a front window of a double-glazed structure, and displays the image by controlling the depth of the image.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the claims, as well as the following description and the annexed drawings.

As described above, the present invention can be applied to a vehicle having an angle of 70 degrees or more (e.g., a large vehicle such as a bus), as well as a vehicle having an angle of front window (e.g., 5 ° to 90 °) We implemented the technology to display.

In addition, the HUD device according to the present invention is configured to display two images on a front window of a double glass structure when a driving information image is projected, and to display a single image, It is possible to enlarge / reduce the image by adjusting the distance (for example, 5cm ~ 20m) to be formed, adjust the viewing angle, and display the perspective image.

In addition, the present invention improves the problem of image distortion caused by the configuration of the conventional reflector (composed of only two reflectors) by adding the first optical lens 140 between the two reflectors, (Eg, 5 inches) so that the adjusted HUD image is displayed in the front window.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view showing a conventional LCD type HUD device. FIG.
2 is a view showing a driver's seat and a front window of a large-sized vehicle.
3 is a block diagram of a hub device according to the present invention;
4 is a view showing the shape and dimensions of a first optical lens according to the present invention.
5 is a view showing the shape and dimensions of a second optical lens according to the present invention.
6 is a view showing the shape and dimensions of a third optical lens according to the present invention.
7 is a view showing the shape and dimensions of a fourth optical lens according to the present invention.
8 is a flowchart illustrating an operation method of a hub apparatus according to the present invention.

In order to accomplish the above object, the present invention provides a hub apparatus for a large vehicle having a front window having an angle of 70 degrees or more with respect to a horizontal reference, comprising: a backlight unit for generating illumination light; A display panel for outputting driving information; a first reflector positioned in front of the display panel for reflecting the image of the driving information outputted to the left by 90 degrees; A first optical lens for densely collecting the optical density of the reflected traveling information image so as to vividly enlarge the image without a distortion of the image and a double image in the process of passing through the second optical lens, the third optical lens and the fourth optical lens, A second reflector positioned on the left side of the first reflector for reflecting the magnified image 90 degrees to the left, A second optical lens for outputting the driving information image output from the second optical lens by changing the magnification of the driving information image by 100% or more, and a third optical lens And a fourth optical lens 180 for smoothing the output image of the third optical lens and eliminating distortion of the image.

According to another aspect of the present invention, there is provided a driving information display method for a vehicle having a front window having a horizontal reference angle of 70 degrees or more,

A step in which the display panel outputs a driving information image, a step in which the first reflector reflects the outputted driving information image by 90 degrees leftward, and the driving information image reflected by the first reflecting mirror is reflected by the second optical lens The first optical lens 140 densely collects the optical density of the reflected traveling information image so that the image is distorted and vividly enlarged without a problem of a double image in the process of passing through the third optical lens and the fourth optical lens Reflecting the magnified image by 90 ° toward the left, and controlling the magnification of the traveling information image reflected by the second mirror to 100% or less, And a third optical lens having an outer diameter of R1370 mm changes the traveling information image outputted from the second optical lens in advance according to the glass curvature state of the front window, And a fourth optical lens having an inner diameter of R650 mm, an outer diameter of R110 mm, and a thickness of 15.00 mm (error +/- 0.2) are used for smoothing the output image of the third optical lens And removing the distortion of the image and projecting the image.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The present invention is a technique for expressing driving information of a vehicle on a front window of a vehicle and is applied to a front window of a large vehicle such as a bus. As shown in FIG. 2, the front window of a large vehicle generally has an angle of more than 70 degrees of horizontal reference, and is a transparent glass of double structure. The image of the traveling information projected from the HUD device according to the present invention is clearly visible on the front window of the transparent large vehicle and is configured to be displayed as a single image by eliminating the formation of two images when projected onto the double- do. Fig. 2 is a view showing a driver's seat and a front window of a large-sized vehicle. Fig. 2 (a) is a plan view of the driver's seat, and Fig. 2 (b) is a side view of the driver's seat.

In addition, the present invention can control the depth feeling of an image generated when the image is displayed on the front window. That is, it is possible to enlarge / reduce the displayed image by adjusting the distance that the image is formed over the front window, to adjust the viewing angle, to display the perspective image, and to adjust the front window of the vehicle, Even if it is set at an angle of -90 degrees, the image is formed.

3 is a block diagram of a hub apparatus according to the present invention.

3, the head device 100 according to the present invention includes a backlight unit 110, a display panel 120, a first reflector 130, a first optical lens 140, a second reflector (not shown) 150, a second optical lens 160, a third optical lens 170, and a fourth optical lens 180.

The backlight unit 110 is installed at a rear side of the display panel 120 and illuminates a rear surface of the display panel 120 to provide a light source. The backlight unit 110 may use a UHP (Ultra High Pressure) lamp, a light emitting diode (LED), a laser, or the like as illumination light.

The display panel 120 may display driving information and various driving information of the vehicle. That is, the running information of the vehicle (speed, engine RPM, temperature gauge, main flow system, etc.) can be displayed as a digital graph or numeric character. The display panel 120 outputs the driving information of the vehicle using the illumination light of the backlight unit 110 as a light source.

The display panel 120 is a screen output device, which is an LCD that transmits various electrical information generated by various devices by changing the transmittance of liquid crystal according to an applied voltage into visual information, LCOS (Liquid Crystal on Sillicon), which is one of the projectors using reflective liquid crystal panels, DMD (Digital Micro-mirror Display), which adjusts the angle of reflection by moving small metal electrodes on the substrate, active matrix type liquid crystal A TFT (Thin Film Transistor) that controls pixels of an LCD by a thin film transistor, and a self-luminous organic EL liquid crystal display that emits light by using an electroluminescent shape that emits light when a current flows through the fluorescent organic compound have.

The first reflector 130 is located at a point in front of the display panel 120 and reflects the image of the traveling information outputted from the display panel 120 to one side. The first reflector 130 reflects the image of the traveling information outputted from the display panel 120 to the first optical lens 140 by inclining the image to the left by about 45 degrees in the horizontal direction of the first reflector 130.

The first optical lens 140 is a concave lens and is processed to have an outer diameter R62.00 mm and a thickness of 7.74 mm (error +/- 0.2) as shown in FIG. 4. The first optical lens 140 reflects And the focal distance is changed. At this time, the first optical lens 140 adjusts the size of the image by approximately 4 inches to 6 inches (for example, 5 inches). If the first optical lens 140 is not present, an image of about 8 to 12 inches (e.g., 10 inches) will be displayed. 4 is a view showing the shape and dimensions of the first optical lens according to the present invention.

The present invention improves the problem of image distortion caused by the configuration of the conventional reflector (consisting of only two mirrors) by adding the first optical lens 140 between the two reflectors, : 5 inches) so that the adjusted HUD image was displayed on the front window.

The first optical lens 140 serves to densely collect the optical density of the image screen reflected by the first reflector 130 between the two reflectors 130 and 150. In order to enlarge the size of the image screen through the second optical lens 160, the third optical lens 170, and the fourth optical lens 180, a concave lens (e.g., the first optical lens 140) It is very important to reduce the size of the screen to increase the sharpness of the screen. In addition, if a screen is enlarged without a procedure for reducing the image sharpness by reducing the image screen with the concave lens (e.g., the first optical lens 140), the image distortion and double image problems arise.

The present invention adjusts the position of the first optical lens 140 between the first reflector 130 and the second reflector 150 in order to adjust the distance that the image is formed on the front window. In other words, by adjusting the position of the first optical lens 140 between the first reflector 130 and the second reflector 150, the focal distance of the heald HUD can be changed from several meters (meters) to several centimeters (centimeters) ). The image can then be projected to a point 5 cm to 2 m beyond the front window.

The second reflector 150 is positioned on the left side of the first reflector 130 with the first optical lens 140 interposed therebetween so that the output image of the first optical lens 140 is incident on the second optical lens 160, So as to reflect the light to the left.

4, the second optical lens 160 is processed to have an outer diameter R of 96.50 mm and a thickness of 18.00 mm (error +/- 0.2). The image magnification of the image reflected by the second reflector 150 And focuses the light onto the third optical lens 170 on the front side. 5 is a view showing the shape and dimensions of the second optical lens according to the present invention.

The second optical lens 160 changes the magnification of the image by 90% to 110% (for example, 100%). The image of the display panel 120 is transmitted through the second reflector 150 to the lens units 160 to 180, To improve the distortion of the image and to widen the viewing angle. The numerical value of 90% to 110% means the lens magnification.

As shown in FIG. 6, the third optical lens 170 is processed to have an outer diameter of R1370 mm and a thickness of 5.00 mm (error of ± 0.2), and the third optical lens 170 is transferred from the second optical lens 160 The image is preliminarily deformed and focused on the front fourth optical lens 180. 6 is a view showing the shape and dimensions of a third optical lens according to the present invention.

Vehicle windshield has different curvature for left / right / top and bottom, and distorted image is generated according to curvature. Therefore, the third optical lens 170 must be designed to pre-deform the image according to such a curvature.

The fourth optical lens 180 may smooth the image transmitted from the third optical lens 170 so that a single image is displayed on the front window 50, As shown in FIG. 7, the inner diameter of the lens is R 650 mm, and the outer diameter of the lens is R110 mm. 7 is a view showing the shape and dimensions of a fourth optical lens according to the present invention.

The third optical lens 170 and the fourth optical lens 180 are designed as a manual lens so that the distortion of the image and the dual image can be adjusted by manually adjusting the lenses 170 and 180 while viewing the image with the naked eye . The third and fourth optical lenses 170 and 180 are connected to a separate driving source (e.g., motor, gear) to adjust the left and right.

Generally, the front window of the vehicle is made of a double structure. Accordingly, when displaying an image on the front window 50, a single image is not formed on the glass surface and a double image is formed. In order to overcome this problem, the conventional head device inserts a film having a high transparency between the glasses of the front window made of a double structure so that a film is formed on the film. Therefore, the vehicles having the conventional head device have a burden of separately installing a front window in which a film of high transparency is inserted between the glasses.

In order to solve this problem, the fourth optical lens 180 and the third optical lens 170 according to the present invention adjust the transmitted image so that the image is formed at a position 5 cm to 20 m away from the front window 50 .

The third optical lens 170 and the fourth optical lens 180 have a constant distance and a lens design curvature so that an image can be formed at a position 5 cm to 20 m away from the window 50. The present invention removes distorted images and dual images while manually adjusting these lenses (170, 180).

8 is a flowchart illustrating an operation method of the hub apparatus according to the present invention.

As shown in FIG. 8, the head device 100 according to the present invention first applies power to the backlight unit 110 to generate illumination light of high luminance. Then, the display panel 120 is activated to display driving information (speed, engine RPM, temperature gauge, main flow system, etc.) of the vehicle. At this time, driving information of the vehicle displayed by the display panel 120 is projected to the first reflector 130 side using the illumination light of the backlight unit 110 as a light source. (S10)

Then, the first reflector 130 reflects the image of the projected traveling information by about 90 degrees leftward (reflecting mirror reference). (S20)

Thereafter, the traveling information image reflected by the first reflector 130 is transmitted to the first optical lens 140, and the first optical lens 140 changes the size of the received traveling information image from 4 to 6 inches (For example, 5 inches) and outputs it to the second reflector 150 side. (S30)

The output image of the first optical lens 140, which is reflected 90 degrees to the left through the second reflector 150, reaches the second optical lens 160.

The second optical lens 160 changes the image magnification of the traveling information image transmitted from the second reflector 150 by about 90% to 110% (for example, 100%), . (S40)

The third optical lens 170 previously modifies the traveling information image transmitted from the second optical lens 160 according to the glass curvature state of the front window and outputs it. (S50) The third optical lens 170 pre-deforms the image transmitted from the second optical lens 160 to match the glass curvature state of the front window and focuses the image on the front fourth optical lens 180. [

The fourth optical lens 180 smoothes the image projected from the third optical lens 170 so that a single image is displayed on the front window 50, and removes image distortion. The image output from the fourth optical lens 180 is projected so as to form an image at a position 5 cm to 20 m away from the front window 50. (S60) The user manually adjusts the third and fourth optical lenses 170 and 180 while viewing the image projected on the window 50 to see a distorted image and a dual image.

The present invention can be realized by projecting an image transmitted from the third optical lens 170 so as to form an image at one point (a distance of 5 cm to 20 m away from the front window 50) It is not necessary to mount a front window in which a film is inserted between the front window and the rear window.

The present invention can enlarge / reduce an image by adjusting the distance (e.g., 5 cm to 20 m) at which the traveling information image is formed over the glass through the third optical lens 170 and the fourth optical lens 180, Adjustable, and displays perspective images. Further, the head device according to the present invention is applicable to a vehicle having a front window (for example, 5 DEG to 90 DEG) at an angle.

In general, a driver who operates a public transportation must identify a variety of terminals (for example, a card terminal, a bus information driver terminal, etc.) at the time of driving or stopping, Is inherent. The present invention can contribute to improving the safety of public transportation by dividing a large screen of 10 inches by using the wireless device 100 and displaying various information on the front window.

Further, since the present invention is intended to develop an apparatus for displaying images on a vertical surface glass, the present invention can be applied not only to buses but also to trains and trains, and it is also possible to provide additional information such as stoppage information, .

In addition, application of the present invention apparatus for displaying images on a vertical plane can be applied directly to the transparent display market, that is, to advertisement, publicity, and entertainment market.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. May be constructed by selectively or in combination. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10, 120: display panel 20: backlight unit
30: optical system 40: reflector
50: front window
100: HUD apparatus 110: backlight unit
130: first reflector 140: first optical lens
150: second reflector 160: second optical lens
170: third optical lens 180: fourth optical lens

Claims

A heald device of a heavy vehicle having a front window of an angle of more than 70 degrees of horizontal reference,
A backlight unit 110 for generating illumination light,
A display panel 120 that uses the illumination light as a light source and outputs driving information,
A first reflector (130) positioned in front of the display panel and reflecting an image of the outputted traveling information at 90 degrees to the left,
The traveling information image reflected by the first reflector passes through the second optical lens 160, the third optical lens 170, and the fourth optical lens 180, A first optical lens 140 for densely collecting and outputting the optical density of the reflected traveling information image,
A second reflector 150 positioned on the left side of the first reflector to reflect the magnified image 90 degrees to the left,
A second optical lens 160 for outputting a magnification of the traveling information image reflected by the second reflector 100% or more,
A third optical lens 170 for previously modifying and outputting the traveling information image outputted from the second optical lens according to the glass curvature state of the front window,
And a fourth optical lens (180) for smoothing an output image of the third optical lens and eliminating image distortion,
The first optical lens 140
A concave lens having an outer diameter of R62.00 mm and a thickness of 7.74 mm (error +/- 0.2)
The second optical lens 160
An outer diameter of 96.50 mm and a thickness of 18.00 mm (error +/- 0.2)
The third optical lens 170
An outer diameter of R1370 mm and a thickness of 5.00 mm (error +/- 0.2)
The fourth optical lens 180
The inner diameter of R650 mm, the outer diameter of R110 mm, and the thickness of 15.00 mm (error of ± 0.2).

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2. The optical element of claim 1, wherein the first optical lens (140)
Wherein the control unit reduces the size of the traveling information image reflected by the first reflector by about 4 to 6 inches according to the position between the first reflector (130) and the second reflector (150) .

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A driving information display method for a vehicle having a front window having a horizontal reference angle of 70 degrees or more,
A process in which the display panel outputs the driving information image,
The first reflector 130 reflects the outputted driving information image 90 degrees to the left,
The traveling information image reflected by the first reflector passes through the second optical lens 160, the third optical lens 170, and the fourth optical lens 180, The first optical lens 140 densely collecting the optical density of the reflected traveling information image so as to be enlarged,
A second reflector 150 positioned on the left side of the first reflector reflects the resized image 90 degrees to the left,
The second optical lens 160 changing the magnification of the traveling information image reflected by the second reflector by 100% or more,
The third optical lens 170 having an outer diameter of R1370 mm deforms the traveling information image outputted from the second optical lens in advance according to the glass curvature state of the front window,
A fourth optical lens 180 having an inner diameter of R 650 mm, an outer diameter of R110 mm, and a thickness of 15.00 mm (error of ± 0.2) smoothes the output image of the third optical lens, And then projecting the image,
The first optical lens 140
A concave lens having an outer diameter of R62.00 mm and a thickness of 7.74 mm (error +/- 0.2)
The second optical lens 160
And an outer diameter of R96.50 mm and a thickness of 18.00 mm (error +/- 0.2).

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8. The apparatus of claim 7, wherein the first optical lens (140)
Wherein the control unit reduces the size of the traveling information image reflected by the first reflector by about 4 to 6 inches according to the position between the first reflector (130) and the second reflector (150) Of the vehicle.

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