KR970011527B1 - Head-up display apparatus for car capable of rear view - Google Patents

Abstract

Disclosed is an apparatus to display a head-up for car which able to observe the back area. The apparatus comprises a CCD camera(30), a projecting optic system(10) and a holographic combiner(20). The CCD camera(30) converts the back area information into an electrical signal. The projecting optic system(10) converts the electrical signal into an image signal, enlarges and projects the image signal. The holographic combiner(20) combined at upper side of the front mirror in a car reflects the image signal to the front mirror. Thereby, the driver is able to easily observe the back area, so that safe and efficient drive is performed.

Description

Vehicle head-up display with background view

1 is a conventional automotive head-up display device.

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

3 is a configuration diagram for explaining another embodiment of the head-up display device for a special vehicle according to the present invention.

4 is a detailed view of the head-up display device of the present invention.

5 is a manufacturing process diagram of the holographic combiner used in the head-up display device of the present invention.

6 is a structural diagram of a holographic projection optical system using a holographic lens and an LCD element in a head-up display device of the present invention.

* Explanation of symbols for main parts of the drawings

1: front glass window 2: room-mirror

3: large truck 10: projection optical system

11: CRT12: lens optical system

13: Reflector 14: Background light source

16: holographic lens 20: holographic combiner

21: master hologram 22: transparent material

23: transparent buffer 24: transparent adhesive

30: CCD camera 40: fastening device

50: the driver.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display device for a vehicle, and in particular, a large and special vehicle capable of displaying a blind spot by cargo loaded in a blind spot of a large truck and a special vehicle on a windshield of the car. A head-up display device suitable for the present invention.

Referring to FIG. 1, an example in which a conventional head-up display device is used in an advanced passenger car is provided with a projection optical system 10 installed in an engine room of a vehicle, and converts various types of information of the vehicle into electronic signals, and then the projection optical system. The CRT 11 converts the image information into an image information, and is enlarged by the lens optical system 12 to be projected onto the holographic combiner 20 through the reflector 13 to be imaged to enter the driver's field of view.

The conventional head-up display device used in high-end passenger cars projects information necessary for various driving, such as the speed and flow rate of the vehicle, onto the holographic combiner 20 attached to the windshield instead of the instrument panel 5, and the driver's field of view. It is intended to solve the problem that it is not possible to quickly cope with the situation that arises urgently while reading the conventional instrument panel 5 by easily coming in.

However, in terms of driving, the external aspect of observing the external environment of the vehicle is more important than the internal aspect such as reading the instrument cluster.

Conventional heavy trucks or special vehicles have image information on the side of the vehicle reflected in the back mirror attached to the driver's seat and the passenger seat, and the rear background reflected in the ROOM-MIRROR installed in the vehicle. Based on the part of the video information about the driver's driving technology has been backward.

Furthermore, when the freight is loaded on the truck, the rear background is covered by the cargo, so the blind spot is reversed based on the image of the side background reflected through the back-mirror without the room mirror. Doing.

In addition, large trucks and special vehicles need to judge frequently and accurately the position of unloading freight trucks for their own purposes, and in the case of container transport vehicles, the position judgment when combining cargo trucks and mobile vehicles In the case of concrete mixer trucks, the assistance of the assistants and the skilled sense of the driver are required to determine the location of the concrete outlet.

In addition, such a large truck or special vehicle has a large blind spot on the rear, which is a great risk for pedestrians such as children.

For this reason, large cargo vehicles or special vehicles need information on the back background to achieve their special purpose. Moreover, the information on the back background of the vehicle is very important in order to prevent safety accidents that are likely to occur in reverse. Do.

Accordingly, the present invention is to solve the problems described above by improving the head-up display device used in the conventional luxury cars, such as the special cargo of a special vehicle such as a large freight transport vehicle, container transport vehicle and concrete transport vehicle It is an object of the present invention to provide a head-up display device in which a driver can easily recognize the background of the rear surface of a vehicle in order to achieve the object efficiently and to prevent a safety accident during the reversing of the vehicle.

The head-up display device of the present invention for achieving the above object is a conversion means for reading the background information of the rear of the vehicle to convert into an electrical signal, a projection optical system for imaging and projecting the information input from the conversion means, And a holographic combiner for displaying an image incident from the projection optical system.

The converting means reads the background information on the rear of the vehicle, converts it into an electrical signal, and transmits it to the projection optical system via wire.The CRT of the projection optical system receives the signal and converts it into an image again, and the converted image is projected. It is magnified through the lens optical system of the optical system and projected onto the holographic combiner.

The holographic combiner reflects an incident image and displays it as an image so that the driver can easily observe the situation behind the vehicle.

Hereinafter, an embodiment of the head-up display device of the present invention will be described with reference to the accompanying drawings.

2 is a first embodiment in which the head-up display device of the present invention is applied to a large truck 3, a CCD camera 30 for reading back image information on the rear end of the large truck 3 is installed. The information read by the CCD camera is converted into an electrical signal by an electronic circuit and transferred to the CRT 11 of the projection optical system 10 connected by wire.

The projection optical system 10 is installed on the upper driver's seat of a large truck, and receives the image information input from the CCD camera 30 via a wire in the CRT (11), the information received in the CRT is converted into image information Then, it is enlarged by the lens optical system 12 and is incident on the holographic combiner 20 attached to the front windshield of the vehicle.

The holographic combiner 20 transmits an image incident from the front of the vehicle and reflects the image incident from the projection optical system, thereby imaging the image incident from the projection optical system using the holographic combiner as a screen.

The holographic combiner 20 is attached to the front windshield of the vehicle, but is preferably attached to the top of the windshield, CCD camera 30 installed on the rear bottom of the van is attached to the lens of the camera due to the characteristics of the van Since it is easy to install the CCD camera storage box and make a cover 31 that can be opened and closed when not in use to close the cover to prevent the CCD camera protection and foreign matters attached.

Next, referring to FIG. 3, a second embodiment in which the head-up display device of the present invention is applied to a container transport vehicle is divided into a container transport vehicle 41 and a container stack vehicle 42. In addition, a fastening device 40 for interconnection is attached to the rear of the container transport vehicle and the front of the load vehicle, so that two vehicles are fastened when the container load vehicle is transported and separated when the movement is completed at the destination.

In such a case, the driver must fasten and detach the two vehicles depending on the rear-view mirror, and only a driver skilled in reverse driving technology can easily connect the vehicle.

Therefore, by installing the CCD camera in the fastening device 40 part A of the container transport vehicle, the holographic combiner 20 converts the information input from the CCD camera into image information in the projection optical system 10. The inexperienced driver can easily connect the container conveying vehicle and the loading vehicle by imaging the image. Also, by installing the CCD camera at the rear end B of the container loading vehicle 42, it is assisted when separating the container loading vehicle at the destination point. It can be separated accurately and easily without operator assistance.

Referring to FIGS. 4 and 5, the holographic combiner 20 used in the present invention will be described in detail. FIG. 5 is a manufacturing process diagram of the holographic combiner. Interfering two light rays to form an interference pattern consisting of a light portion and a dark portion is formed so that the interference pattern has an optical information about the two light rays to function as an optical element.

The interference fringe is recorded on a transparent recording material that generates an optical reaction, such as dichromate gelatin, to produce a master hologram 21 through a general chemical process such as development, fixation, and cleaning. When the transparent material 22 is replicated on the master hologram 21 by sputtering, an interference pattern like a master hologram can be obtained, and the interference pattern is attached to the valley part of the pattern to attach the interference pattern to the front windshield of the vehicle without damage. A transparent buffer 23 is applied and a transparent adhesive 24 is applied thereon.

When the holographic combiner 20 thus formed is attached as shown in FIG. 4, the light projected from the projection optical system 10 is reflected by the holographic combiner 20 (22, 23, 24). It is reflected in the driver's eyes 50.

6 shows an LCD projection optical system 18, which is another type of projection optical system used in the present invention, in which the CRT 11 has a limitation in reducing its own volume due to the characteristics of the product, thus replacing it with an LCD element. This can reduce the volume of the entire projection optical system.

In more detail, the LCD projection optical system 18 uses the transmissive LCD element 15 to separate light emitted from the background light source 14 into a transmissive portion and an opaque portion by the LCD element.

In other words, if the inverse is converted according to the signal converted into an electric signal by the CCD camera, the background part becomes black and the image part becomes white, and the black part does not pass through the background light source 14, but only the white part passes through the background light source. The image is enlarged by the holographic lens 16 and projected onto the holographic combiner 20.

According to the present invention as described above, a large cargo vehicle, etc. can easily observe the rear of the vehicle at the time of reversing, thereby preventing safety accidents in advance, and also allowing the driver to make a position determination for unloading the cargo through an image. As a result, the work efficiency is increased, and in particular, a container transport vehicle and a concrete mixer vehicle can use the head-up display device according to the special purpose of these vehicles, so that even the unskilled person can easily work to increase the work efficiency.

Claims (6)

In a vehicle head-up display device, a CCD camera 30 that reads background information on a rear surface of a vehicle and converts it into an electrical signal, and converts an electrical signal of background information input by the CCD camera 30 into an image signal, And a projection optical system 10 for enlarging and projecting the converted image signal, and a holographic combiner attached to an upper surface of the vehicle front glass to reflect the image signal projected from the projection optical system 10 and to display it on the windshield. A vehicle head-up display device capable of viewing a rear background composed of (20). The vehicle head-up display device according to claim 1, wherein the CCD camera (30) is installed in the rear of the vehicle and stored in a storage box in which a cover (31) capable of opening and closing is formed. 3. The head-up display device according to claim 2, wherein the CCD camera (30) is installed at a fastening portion of the transport vehicle when the vehicle is a container transport vehicle. The CRT 11 of claim 1, wherein the projection optical system 10 enlarges the CRT 11 converting the electrical signal input by the CCD camera 30 into an image signal and the image signal converted by the CRT 11. And a lens optical system (12) for projecting onto the holographic combiner (20). The vehicle head-up display device according to claim 1, wherein the projection optical system (10) is an LCD projection optical system consisting of a transmissive LCD element, a background light source, and a holographic lens. The method of claim 1, wherein the holographic combiner 20 is characterized in that the transparent buffer 22 and the transparent adhesive 24 are sequentially applied to the transparent material 22 replicated from the master hologram 21. Automotive head-up display device with a rear background.