KR20070107972A - Head up display device for automobile - Google Patents

Abstract

A head up display device for an automobile is provided to implement a virtual image, which does not have distortion caused by the movement of a driver, in real time. A head up display device for an automobile includes a micro-display panel(22) displaying an image about a driving information by using light. A micro-mirror array(24) reflects the image displayed from the micro-display panel while is moving depending on a movement of an eye of a driver. The micro-mirror array includes micro-mirrors reflecting the image or a virtual image and a driving unit. The head up display device for an automobile includes a light source(21) and a lens(23). The lens creates the virtual image of the image displayed from the micro-display panel.

Description

Head up display device for automobiles

1 is a schematic diagram of a typical reflective head-up display device.

2 is a configuration diagram of an embodiment of a vehicle head-up display device according to the present invention.

3 is a view showing the structure of a micromirror array according to the present invention.

4 is a plan view of an embodiment of a micromirror array according to the present invention.

<Explanation of symbols for the main parts of the drawings>

21: light source 22: micro display panel

23 lens 24 micro mirror array

25: windshield

The present invention relates to a head up display device, and more particularly to a vehicle head up display device.

There are several systems that are being developed as a medium that provides the driver's safety while driving and effectively transmits the vehicle driving information and surrounding information to the driver. Head up display (HUD) has become a major concern. The head-up display (hereinafter referred to as 'HUD') is a system that provides vehicle driving information or other information within the range of the driver's front line, ie, the driver's line of sight, while driving a vehicle or aircraft.

For example, there is a risk because, while driving at a normal speed of about 100 km / h, the field of view is placed on the instrument cluster and travels a distance of about 55 m for a time (2 seconds) to fix the field of view by road. One way to reduce this risk is to develop a vehicle HUD. The vehicle HUD displays information on the dashboard (speed, mileage, RPM, etc.) on the driver's field of view on the windshield, allowing the driver to easily grasp driving information while driving. This enables the driver to drive safely by recognizing important driving information without taking his eyes off the road.

However, typical reflective HUDs have a limited range of activity that allows you to adjust the HUD's viewing angle or adjust it to a range of viewing angles that are limited by the driver's eye level or position. There was a problem in that the angle of the control or to change the focus.

An object of the present invention is to provide a head-up display device for a vehicle that can adjust the viewing angle of the head-up display in real time according to the driver.

According to an aspect of the present invention, there is provided a head up display device for a vehicle according to an embodiment of the present invention, comprising: a micro display panel for expressing an image of driving information using light, and the image from the micro display panel in real time according to the movement of the driver's eyes. It is preferably composed of a micro mirror array that reflects while moving.

Hereinafter, with reference to the accompanying drawings, the configuration and operation of an embodiment of a vehicle head-up display device according to the present invention will be described as follows.

First, a schematic diagram of the general reflective head-up display device shown in FIG. 1 will be described to help understand the present invention.

The HUD controller 13 executes a process of converting driving information transmitted from the vehicle's internal system into displayable data, and the data is reflected from the mirror 12 as an image from the display panel 11. Projected onto the windshield 15, driving information is provided to the driver by forming a virtual image 14 within the driver's field of view. Here, the mirror 12 is usually a concave mirror (concaver mirror), the concave mirror should be designed as an expensive aspheric mirror considering the aberration correction in order to implement a virtual image undistorted to the driver through the windshield.

2 is a configuration diagram of an embodiment of a vehicle head-up display device according to the present invention, which includes a light source 21, a micro display panel 22, a lens 23, a micromirror array 24, and a windshield ( 25).

The light source 21 shown in FIG. 2 is a backlight of the micro display panel 22, and the light generated from the light source 21 is incident on the micro display panel 22.

Here, a green or red light emitting diode (LED) may be used as the light source 21.

On the other hand, the micro display panel 22 outputs the driving information, which has undergone a process of being converted into displayable data, into an image by using light emitted from the light source 21 and outputs to the lens 23.

Here, the micro display panel 22 may use a liquid crystal display (LCD) or a liquid crystal on silicon (LCoS).

Next, the lens 23 creates a virtual image of the image from the micro display panel 22.

That is, the image from the micro display panel 22 does not form an image and cannot be viewed with the driver's eyes, so the virtual image must be made through the lens 23.

Next, the micromirror array 24 reflects the virtual image of the image produced by the lens 23 to the windshield 25 while moving in real time according to the movement of the driver's eyes.

That is, in the structure of the micromirror array shown in FIG. 3, the viewing angle of the HUD is adjusted by correcting the focus while moving the micromirror array in real time according to the movement of the driver's eyes.

Here, the micro mirror array 24 is preferably composed of micro mirrors and a driver for driving the micro mirrors.

4 shows a plan view of the micro mirror array 24, and it can be seen that it consists of several micro mirrors.

That is, the micromirror array of the present invention is made using a finely divided pixelated mirror rather than a concave mirror in a general reflective HUD.

In addition, the micro mirror array is a structure in which a Fresnel lens and a diffraction optical element are mixed, and as shown in FIG. 3, the mirrors are independently rotated or translated. You can correct the focus and aberration by translation.

Meanwhile, as shown in FIG. 4, the micromirrors may be made of one of Al, Ag, or Au having high reflectance, and the driving unit may drive the micromirrors using an electrostatic force or an electromagnetic force.

Here, the driving unit has a fast response time by using electrostatic force or electromagnetic force, so that the viewing angle of the HUD can be adjusted in real time according to the movement of the driver's eyes.

Finally, the virtual image reflected from the micromirror array is projected on the windshield 25 to form a virtual image representing driving information in the driver's field of view.

Here, it is preferable that the windshield 25 is aspherical.

On the other hand, the terms used in the present invention (terminology) are terms defined in consideration of the functions in the present invention may vary according to the intention or practice of those skilled in the art, the definitions are the overall contents of the present invention It should be based on.

The present invention is not limited to the above-described embodiments, and as can be seen in the appended claims, modifications can be made by those skilled in the art to which the invention pertains, and such modifications are within the scope of the present invention.

As described above, the vehicle head-up display device according to the present invention can realize a virtual image in real time without distortion due to the driver's movement by adjusting the viewing angle of the HUD in real time using the micro mirror array 24. In addition, it not only helps the driver's safe driving, but also removes the restriction of the driver's viewing of the virtual image.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (5)

A micro display panel using light to express an image of driving information; and And a micro mirror array reflecting the image from the micro display panel in real time according to the movement of the driver's eyes. The head up display device for a vehicle according to claim 1, wherein A light source for generating the light; A lens for creating a virtual image of the image from the micro display panel; And And a windshield configured to project the virtual image reflected by the micromirror array to form a virtual image representing the driving information in the field of view of the driver. The method of claim 1, wherein the micro mirror array is Micromirrors that reflect the image or virtual image; And And a driving unit for driving the micro mirrors. The method of claim 3, wherein the micro mirrors are A vehicular head-up display device comprising any one of Al, Ag, or Au having high reflectance. The method of claim 3, wherein the driving unit The head-up display device for a vehicle, characterized in that for driving the micro mirrors using an electrostatic force or an electromagnetic force.

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