KR101298037B1 - Apparatus and method for head up display - Google Patents

Abstract

PURPOSE: A head-up display device and a method thereof are provided to adjust a view angle and to enlarge or reduce an image by adjusting a distance of forming a driving information image over a front window. CONSTITUTION: A head-up display device (100) includes a display panel (120), a first reflective mirror (130), a second reflective mirror (140), a first optical lens (150), and a second optical lens (160). The display panel outputs driving information by using light as a light source. The first reflective mirror is located in front of the display panel to reflect an image of the driving information downwardly at 7°. The second reflective mirror reflects the image of the information upwardly at 25°. The first optical lens transforms the image of the information reflected by the second reflective mirror according to a glass curvature state of a front window in order to output the same. The second optical lens projects the output image of the first optical lens to form an image over the front window.

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.

However, in the conventional HUD apparatus, when projecting an image on a glass surface having a vertical angle of 70 ° or more from horizontal, such as a front window of a bus or a large vehicle, most images are transmitted to form an image on the glass surface. I never do that. The driver cannot see the output image (eg, the driving information image) of the HUD device.

In addition, when the window glass has a double structure such as a front window of a bus or a large vehicle, an output image (eg, driving information image) of the HUD device projected on the front window forms a double image on the glass surface. It caused a problem of providing the driver with driving information that is less explicit and discernible.

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.

The present invention implements a technique for displaying driving information to a vehicle having a front window (for example, 5 to 90 degrees) at an angle as well as a vehicle (e.g., a large vehicle such as a bus) .

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.

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 flowchart illustrating a method of operating a head device according to the present invention.

In order to achieve the above object, the present invention provides a hub apparatus comprising:

A backlight unit for generating illumination light, a display panel for outputting travel information using the illumination light as a light source, and a first panel positioned in front of the display panel to reflect the image of the output travel information downward in one direction A reflector, a second reflector reflecting the travel information image reflected by the first reflector to one side upward, and a travel information image reflected by the second reflector are smoothed and output according to the glass curvature of the front window. And a second optical lens for projecting the output image of the first optical lens to form an image over a front window.

According to another aspect of the present invention, there is provided a driving information display method for a vehicle,

Outputting a driving information image of a display panel; reflecting the output driving information image in a 7 ° downward direction; reflecting the reflected driving information image in a 25 ° upward direction; and in the upward direction And smoothing the reflected driving information image according to the glass curvature of the front window, and projecting the smoothed driving information image to form an image over a front window through an optical lens of a predetermined standard. Is done.

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.

As shown in FIG. 3, the head device 100 according to the present invention includes a backlight unit 110, a display panel 120, a first reflector 130, a second reflector 140, and a first optical lens. 10) and a second optical lens 150.

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 a type of projector using reflection type liquid crystal panel, DMD (Digital Micro-mirror Display), which adjusts the angle of reflection by moving minute metal electrodes formed on a substrate, an 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 positioned at one point in front of the display panel 120 to reflect the image of the driving information output from the display panel 120 to one side. The first reflector 130 reflects the image of the driving information output from the display panel 120 downward by about 7 degrees of the horizontal reference of the first reflector 130.

The second reflector 140 reflects the image reflected by the first reflector 130 so as to reach the first optical lens 150 by tilting upward of the horizontal reference 25 degrees of the second reflector 140.

As shown in FIG. 4, the first optical lens 150 is processed to R1370 mm, and the image reflected from the second reflector 140 according to the curvature of the display surface glass is transferred to the curvature of the front window. The output is transformed accordingly. This is referred to as smoothing, and the first optical lens 150 smoothes the image reflected from the second reflector 140 and concentrates the second optical lens 160 in front. 4 is a view showing the shape and dimensions of the first 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 first optical lens 150 should be designed to smooth the image according to this curvature.

The second optical lens 160 adjusts the image transmitted from the first optical lens 150 so that a single image is displayed in the front window 50, that is, a double image is not formed. As shown in the figure, the inner diameter of the lens is processed to R650mm and the outer diameter to R110mm. 5 is a view showing a shape and dimensions of a second optical lens according to the present invention.

According to the present invention, the first optical lens 150 and the second optical lens 160 are designed as manual lenses, and the image distortion and the dual image are adjusted by manually adjusting these lenses 150 and 160 left and right while viewing the naked eye. Can be. In addition, in order to adjust the first and second optical lenses 150 and 160 left and right, the first and second optical lenses 150 and 160 may be connected to separate driving sources (for example, a motor and a gear).

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 second optical lens 160 according to the present invention adjusts an image transmitted from the first optical lens 150 to form an image at a distance of 5 cm to 20 m over the front window 50. It was.

The first optical lens 150 and the second optical lens 160 have a constant distance and lens design curvature so as to form an image at a point 5cm to 20m away from the window 50. The present invention eliminates distortion and dual images of the image while manually adjusting these lenses (150, 160).

6 is a flowchart illustrating a method of operating a head device according to the present invention.

As shown in FIG. 6, 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. In this case, the driving information of the vehicle displayed by the display panel 120 is projected toward the first reflector 130 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 travel information in about 7 ° downward (based on the first reflector). (S20)

The reflected travel information image is transmitted to the second reflector 140, and the second reflector 140 reflects the travel information image by approximately 25 ° upward (based on the second reflector). (S30)

Thereafter, the driving information image reflected by the second reflector 140 is transmitted to the first optical lens 150 again, and the first optical lens 150 transmits the received driving information image to the glass of the front window. The output is transformed according to the curvature. The first optical lens 150 smoothes and concentrates the image reflected by the second reflector 140 toward the front second optical lens 160.

The driving information image output from the first optical lens 150 is projected toward the second optical lens 160, and the second optical lens 160 displays the single image on the front window 50. 1 Adjust the image projected from the optical lens 150. The second optical lens 160 projects an image transmitted from the first optical lens 150 to form an image at a point 5 cm to 20 m away from the front window 50. The driving information image projected by the second optical lens 160 forms a screen having a size of 5 to 10 inches at a point (for example, 5 cm to 20 m) beyond the front window 50. The user manually adjusts the first and second optical lenses 150 and 160 to the left and right while adjusting the image distortion and the dual image while visually viewing the image projected beyond the window 50.

The present invention projects an image transmitted from the first optical lens 150 so as to form an image at one point (5 cm to 20 m away) beyond the front window 50, thereby providing a separate front window (eg, glass) for the head device. It is not necessary to mount the front window with the film paper inserted in between.

According to the present invention, the second optical lens 160 adjusts the distance (eg, 5 cm to 20 m) in which the driving information image is formed over the glass, thereby allowing the image to be enlarged / reduced, the viewing angle can be adjusted, and the image having perspective Will be displayed. Further, the head device according to the present invention is also applicable to a vehicle having a front window (for example, 5 degrees-90 degrees) 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 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 is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, 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.

As described above, the present invention can be applied to a vehicle having an angle of 70 degrees or more (for example, a large vehicle such as a bus) as well as a vehicle having an angle of front window (for example, 5 degrees to 90 degrees) 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.

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

Claims (7)

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) which uses the illumination light as a light source and outputs driving information;
A first reflector 130 positioned in front of the display panel to reflect the image of the output travel information downward by 7 °;
A second reflector 140 reflecting the traveling information image reflected by the first reflector upward by 25 °;
A first optical lens (150) having an outer diameter of R1370 mm, which deforms and outputs the traveling information image reflected by the second reflecting mirror according to the glass curvature of the front window;
And a second optical lens 160 having an inner diameter of R650mm and an outer diameter of R110mm, and projecting the output image of the first optical lens to form an image over a front window. Heard device, characterized in that configured. delete delete delete delete A heald device of a heavy vehicle having a front window of an angle of more than 70 degrees of horizontal reference,
A display panel outputting a driving information image;
A process in which the first reflector 130 reflects the output travel information image in a 7 ° downward direction;
A second reflector 140 reflecting the reflected driving information image in a 25 ° upward direction;
A step of projecting, by the first optical lens 150 having an outer diameter of R1370 mm, the traveling information image reflected in the upward direction in advance according to the glass curvature of the front window;
And a process of projecting the modified driving information image by the second optical lens 160 to form an image at a point beyond the front window.
And the second optical lens (160) has an inner diameter of R650mm and an outer diameter of R110mm. delete

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