JPH10163722A - Antenna system for vics - Google Patents

Abstract

PROBLEM TO BE SOLVED: To install an antenna on a dashboard and to reduce the restriction of a installation direction by forming the reception part of a radio wave beacon information reception means by directly giving a metal film on the surface of an insulating substrate. SOLUTION: The reception part 1 of the radio wave beacon information reception means (radio wave reception means), the light reception part 2 of an optic/electric conversion means for light beacon information reception (light reception means) and the light emitting parts 3 of plural optic/electric conversion means for light beacon information emission (light emitting means) are provided on one face of the insulating substrate 5, and transparent convex lenses 8 are arranged on the upper parts of the light emitting parts 3 of the light emitting means. In the reception part 1 of the radio wave reception means, metal paste is applied to the surface of the insulating substrate 5 and it is baked. Thus, the metal film is directly given on the surface of the insulating substrate 5 and the reception part 1 is formed. Thus, thickness can be thinned and information which the light reception part of the light reception means receives and information which the light emitting parts 3 of the light emitting means emit are difficult to be interrupted. Then, the restriction of the installation direction is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a VICS antenna device used for a car navigation system.

[0002]

2. Description of the Related Art In order to improve road traffic conditions, etc., VICS receives information transmitted from a roadside beacon communication device installed on the roadside to obtain traffic information such as traffic jams and intersections.
An in-vehicle information communication system called (Vehicle Information & Communication System) has been put to practical use. In this system, information is output by a plurality of communication media such as an optical beacon and a radio beacon, and a user selects a route by utilizing information of each communication medium. In this way, it is intended to prevent concentration of traffic volume and assist smooth operation to the destination.

This system not only receives common information transmitted from a road beacon communication device, but also
By transmitting information from the vehicle side to the road beacon communication device, more detailed information can be obtained, and this is realized by bidirectional communication using an optical beacon.

Therefore, a car navigation device used in this system includes a VICS antenna device capable of receiving and transmitting information such as optical beacon information and radio wave beacon information, and transmits information to and from a road beacon communication device in a vehicle. In addition to being installed on the dashboard near the windshield, which is the easiest place to receive and transmit, the operating part operated by the driver and the display part that processes and displays the information received by the antenna device are installed in the driver's seat. It is commonly used in a nearby installation.

As a VICS antenna device capable of receiving and transmitting the optical beacon information and the radio beacon information, for example, a photoelectric device for receiving optical beacon information such as a photodiode as disclosed in Japanese Patent Application Laid-Open No. 7-270513 is known. A conversion unit, a photoelectric conversion unit for emitting light beacon information such as an infrared light emitting LED, and a radio wave beacon information reception unit such as a flat plate antenna unit, on a single plate, a light receiving unit, a light emitting unit, An integrated antenna device is used by mounting the receiver so that it faces in the same direction, and the light-receiving unit of each means mounted on this one board is a road-side beacon communication device installed on the roadside. It is used in the direction of.

As shown in FIG. 2 of JP-A-7-270513, a radio beacon information receiving means is used in which a metal film is formed on the surface of an insulating plate on which a modulation circuit and the like are formed. The insulating plate is mounted such that the portion of the insulating plate is in contact with the one plate. Therefore, it is generally mounted so as to protrude from the optical beacon information receiving photoelectric conversion unit or the optical beacon information emission photoelectric conversion unit.

[0007] In order to reduce the influence of disturbances such as rain, fog, snow and sunlight, and obtain stable and good information, it is preferable that the amount of information to be received and transmitted is as large as possible. It is. However, JP-A-7-27
In the case of an antenna device in which each unit such as a flat plate antenna unit is mounted as shown in No. 0513, if the size of each unit is increased in order to increase the amount of information to be received and transmitted, the mounting height is high. There is a case where the information is blocked by the means and the transmission of the information becomes unstable, and there is a problem that the direction in which the antenna device is installed is limited.

Attempts to install an antenna device whose direction of installation is limited in a narrow portion such as on a dashboard of a car may obstruct the driver's view, which poses a safety problem. Therefore, there is a demand for an antenna device that can be installed on a dashboard of a car or the like and has less restrictions on the installation direction.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a receiving section of a radio wave beacon information receiving means, an optical beacon information receiving light. A VIC that can be installed on a dashboard or the like, with the light receiving part of the electric conversion means and the light emitting part of the photoelectric conversion means for emitting light beacon information on one surface of an insulating substrate.
An object of the present invention is to provide an antenna device for S, which has less restrictions on the installation direction.

[0010]

According to a first aspect of the present invention, there is provided a VICS antenna device comprising: a receiving section of a radio wave beacon information receiving section; a light receiving section of a photoelectric conversion section for receiving optical beacon information; In a VICS antenna device in which a light emitting portion of a light emitting photoelectric conversion means is provided on one surface of an insulating substrate, a receiving portion of a radio wave beacon information receiving means is formed by directly applying a metal film to a surface of the insulating substrate. It is characterized by having been done.

According to a second aspect of the present invention, there is provided a VICS antenna device according to the first aspect, wherein the light emitting portion of the optical beacon information light emitting photoelectric conversion means is provided on the one surface of the insulating substrate. A plurality of light emitting portions of the optical beacon information light emitting photoelectric conversion means are electrically connected.

According to a third aspect of the present invention, there is provided a VICS antenna device according to the first or second aspect, wherein the light receiving portion of the optical beacon information receiving photoelectric conversion means is configured to receive radio wave beacon information. It is provided on the surface of the receiving section of the means.

According to a fourth aspect of the present invention, there is provided a VICS antenna device according to any one of the first to third aspects.
The ICS antenna device is characterized in that a receiving portion of GPS information receiving means formed by directly applying a metal film to the surface of the insulating substrate is also provided on the one surface of the insulating substrate.

According to the present invention, since the receiving portion of the radio wave beacon information receiving means is formed by directly applying a metal film to the surface of the insulating substrate, the thickness can be reduced, and the light for receiving the optical beacon information can be reduced. Information received by the light receiving unit of the electrical conversion unit and information emitted by the light emitting unit of the optical beacon information light emitting photoelectric conversion unit are not easily shielded, and the antenna device is less restricted in the installation direction.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A VICS antenna device according to the present invention will be described with reference to the drawings. FIG. 1 shows a V according to the present invention.
It is a figure explaining the important section of a 1st embodiment of an antenna device for ICS, (a) is a top view and (b) and (c) are sectional views. FIG. 2 is a view for explaining a main part of a second embodiment of the VICS antenna device according to the present invention,
(A) is a plan view and (b) is a cross-sectional view.

As shown in FIGS. 1A, 1B and 1C, a first embodiment of a VICS antenna device according to the present invention is a radio beacon information receiving means (hereinafter referred to as a radio receiving means). ), A light receiving unit 2 of an optical beacon information receiving photoelectric conversion unit (hereinafter referred to as a light receiving unit), and a plurality of optical beacon information emitting photoelectric conversion units (hereinafter referred to as a light emitting unit). A VICS in which the light emitting section 3 is provided on one surface of an insulating substrate 5 made of ceramic, and a transparent acrylic convex lens 8 is disposed above the light emitting section 3 of the light emitting means.
Antenna device. FIG. 1 (b) is the same as FIG.
1A shows an AA cross section, and FIG. 1C shows FIG.
BB section of FIG.

The receiving section 1 of the radio wave receiving means is formed by directly applying a metal paste on the surface of the insulating substrate 5 and then sintering to directly apply a metal film to the surface of the insulating substrate 5. , The receiving unit 1 of the thin radio wave receiving means. The shape of the receiving unit 1 of this radio wave receiving means is as follows.
It has a substantially square planar shape, and V
An ICS power supply point 11 is provided. Note that the shape of the receiving unit 1 of the radio wave receiving means is not limited to a substantially square, but may be a substantially rectangular shape or a partially missing square.

The insulating substrate 5 used in the present invention is not limited to the ceramic insulating substrate 5, but may be, for example, an epoxy resin, a phenol resin, a polyimide resin, an unsaturated polyester resin, or a polyphenylene ether resin. An organic board in which a thermosetting resin such as a system is impregnated and cured with a base material such as cloth or paper of inorganic fibers such as glass or organic fibers such as polyester, polyamide, or cotton. In addition, in the case of the ceramic insulating substrate 5, the heat resistance is preferably superior to that of the organic insulating substrate 5. Examples of the ceramic insulating substrate 5 include alumina-based and glass-based ceramic plates.

The method of applying a metal film directly to the surface of the insulating substrate 5 is not limited to a method of applying a metal paste, but may be applied by metal plating, or may be applied by vapor deposition of metal. You may. Alternatively, the receiving portion 1 of the radio wave receiving means may be formed by etching an unnecessary portion of the metal foil or the like using the insulating substrate 5 formed by directly applying a metal foil or the like directly to the surface layer.

The VICS antenna device according to the present invention comprises:
Since the receiving section 1 of the radio wave receiving means is formed by directly applying a metal film to the surface of the insulating substrate 5, the thickness can be reduced, and information received by the light receiving section 2 of the light receiving means,
It is difficult to shield the information emitted by the light emitting unit 3 of the light emitting means, and the antenna device is less restricted in the installation direction.

The VICS power supply point 11 is provided to penetrate the insulating substrate 5 and electrically connects the front and back of the insulating substrate 5 to transmit information received by the receiving unit 1 of the radio wave receiving means. The signal is transmitted to the surface of the insulating substrate 5 opposite to the surface on which the receiving unit 1 of the radio wave receiving means is formed, and further transmitted to a VICS (not shown).
The signal is transmitted to a signal processing device or the like.

As a method of electrically connecting the front and back of the insulating substrate 5 at the VICS power supply point 11, a method of embedding a conductive paste in the through-hole or a method of performing metal plating on the wall surface of the through-hole is used. For example, a method of forming a metal layer and making a connection may be used.

The light receiving section 2 of the light receiving section is provided on the surface of the receiving section 1 of the radio wave receiving section by being adhered with an insulating adhesive. Note that, of the part of the radio wave receiving means where the receiving part 1 is formed, a part to which the light receiving part 2 of the light receiving means is bonded is provided with a part without a metal film. The information received by the light receiving unit 2 of the light receiving unit is transferred to the surface of the insulating substrate 5 opposite to the surface on which the light receiving unit 2 is formed, through the through hole formed in the portion where the film is not provided. It is designed to communicate.

As a method of transmitting information from the light receiving unit 2 of the light receiving unit, a metal layer is formed on the wall surface of the through hole by performing metal plating or the like, and the light receiving unit 2 of the light receiving unit of the insulating substrate 5 is formed.
And a method using an electric wire connected to the light receiving section 2 of the light receiving means, for example, by connecting to a conductor circuit formed on the surface opposite to the surface on which the light is formed. Note that a photodiode or the like can be used as the light receiving unit.

When the receiving section 1 of the radio wave receiving means receives information, it mainly receives the information in the surrounding area.
Even if the light receiving section 2 of the light receiving means is disposed at the center of the surface, the amount of information obtained is not greatly different and good reception is possible. As described above, it is preferable that the light receiving unit 2 of the light receiving unit is disposed on the surface of the receiving unit 1 of the radio wave receiving unit because the antenna device can be downsized.

The light emitting portion 3 of the light emitting means is disposed inside a concave portion formed in the insulating substrate 5, and the light emitting portion 3 of the insulating substrate 5 is formed through a through hole connected to the concave portion. The information transmitted from the surface opposite to the surface on which the light emitting portion 3 is formed is transmitted. As a method of transmitting information to the light emitting unit 3 of the light emitting unit, there is a method similar to the method of transmitting information from the light receiving unit 2 of the light receiving unit. Note that the light emitting section 3 of the light emitting means is not limited to being provided in the recess, and may be provided on a flat surface. This makes it difficult to shield the information to be received and the information received by the light receiving unit 2 of the light receiving unit, and the antenna device is less restricted particularly in the installation direction. As this light emitting means, infrared light emitting L
ED and the like.

The light emitting portions 3 of the plurality of light emitting means are electrically connected to each other and provided on one surface of the insulating substrate 5. Therefore, when light beacon information is emitted, electric information for emitting light is transmitted to the light emitting unit 3 of each light emitting unit.
.. After being divided and transmitted, the light-emitting part 3 of each light-emitting means
・ When the light beacon information arrives at the roadside beacon communication device installed on the roadside, the light beacon information is combined and supplemented, and is used as high-intensity light beacon information. .

A transparent convex lens 8 is disposed above the light emitting section 3 of the light emitting means. Therefore, the light emitted from the light emitting unit 3 of the light emitting means is output with its direction corrected in a certain direction, and the intensity of the optical information reaching the on-road beacon communication device installed on the road side is reduced. It is designed to increase.

The number of the light-emitting portions 3 of the light-emitting means is not limited to a plurality of light-emitting portions, and one light-emitting portion may be provided. Even in this case, since the information emitted from the light emitting unit 3 of the other light emitting means arrives, the antenna device is particularly preferable because the installation direction is less restricted.

The antenna device is not limited to a device arranged and used on a horizontal surface such as on a dashboard, but may be fixed to an upper portion of a windshield of a car and used. It may be used by pasting it on

As shown in FIGS. 2 (a) and 2 (b), a second embodiment of the VICS antenna device according to the present invention has a receiving unit 1 of a radio wave receiving unit and a light receiving unit 2 of a light receiving unit.
A light emitting unit 3 of a plurality of light emitting units and a receiving unit 4 of a GPS information receiving unit are formed on one surface of an insulating substrate 5 made of ceramic; This is a VICS antenna device provided with a transparent acrylic convex lens 8. Note that FIG. 2B is a cross-sectional view of FIG.
The C section is shown.

The receiving portion 1 of the radio wave receiving means is formed by directly applying a metal film to the surface of the insulating substrate 5 in the same manner as in the first embodiment of the VICS antenna device according to the present invention. The receiving unit 1 is a thin radio wave receiving unit.

Therefore, in this antenna device, similarly to the first embodiment of the VICS antenna device according to the present invention, the information received by the light receiving section 2 of the light receiving section and the light emitting section 3 of the light emitting section are provided. It is difficult to shield light-emitting information, and the antenna device has less restrictions on the installation direction.

The light receiving section 2 of the light receiving means is adhered to the surface of the insulating substrate 5. In addition, a through hole is provided in a part of the portion where the light receiving unit 2 of the light receiving unit is in contact with the insulating substrate 5, and information received by the light receiving unit 2 of the light receiving unit through this through hole is provided. The light is transmitted to the surface of the insulating substrate 5 opposite to the surface on which the light receiving portion 2 of the light receiving means is formed.

The light emitting section 3 of the light emitting means is disposed inside a concave portion formed in the insulating substrate 5, as in the first embodiment of the VICS antenna device according to the present invention. The light emitting units 3 of the plurality of light emitting units are electrically connected to each other and provided on one surface of the insulating substrate 5.

The receiving unit 4 of the GPS information receiving means is
By being formed in the same manner as the receiving section 1 of the radio wave receiving means, the receiving section 1 of the thin GPS information receiving means is formed by directly applying a metal film to the surface of the insulating substrate 5. Therefore, similarly to the receiving unit 1 of the radio wave receiving unit, it is difficult to shield information received by the light receiving unit 2 of the light receiving unit and information emitted by the light emitting unit 3 of the light emitting unit.

The receiving unit 4 of the GPS information receiving means
The GPS information received by GPS is information for GPS (Global Positioning System) which receives a radio wave transmitted from an artificial satellite to obtain a position. When a position is detected, radio waves from three or more satellites are used. , And by calculating distance data and altitude data by radio waves from the plurality of artificial satellites, an accurate position can always be obtained.

Therefore, if an antenna device including the receiving section 4 of the GPS information receiving means is used, it is possible to always request information using an accurate vehicle position and obtain accurate traffic information. There are fewer restrictions on where to install the device.

The receiving unit 4 of the GPS information receiving means
Has a substantially square planar shape, and a GPS feed point 41 is provided on a part of the plane. This G
The PS feed point 41 electrically connects the front and back of the insulating substrate 5 in the same manner as the VICS feed point 11.
The information received by the receiving unit 4 of the GPS information receiving unit is transmitted to the surface of the insulating substrate 5 opposite to the surface on which the receiving unit 4 of the GPS information receiving unit is formed, and further transmitted to a GPS signal processing device (not shown) or the like. It has become.

[0040]

According to the VICS antenna device of the present invention, since the receiving portion of the radio wave beacon information receiving means is formed by directly applying a metal film to the surface of the insulating substrate, the thickness can be reduced. It is difficult to block the information received by the light receiving unit of the light receiving unit (optical beacon information receiving photoelectric conversion unit) and the information emitted by the light emitting unit (optical beacon information emitting photoelectric conversion unit). The antenna device is less restricted in the direction in which it is performed.

The VICS antenna device according to claim 3 of the present invention can reduce the size of the antenna device in addition to the above effects.

The VICS antenna apparatus according to claim 4 of the present invention can request information using an accurate vehicle position and obtain accurate traffic information in addition to the above-mentioned effects.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams illustrating a main part of a VICS antenna device according to a first embodiment of the present invention, wherein FIG. 1A is a plan view, and FIGS.

FIGS. 2A and 2B are diagrams illustrating a main part of a second embodiment of a VICS antenna device according to the present invention, wherein FIG. 2A is a plan view and FIG.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 radio wave receiving means (radio wave beacon information receiving means) 2 light receiving means (optical beacon information receiving photoelectric converting means) 3 light emitting means (optical beacon information emitting photoelectric converting means) 4 GPS information receiving means 5 insulating substrate 8 Convex lens 11, 41 Feeding point

Continuing on the front page (72) Inventor Kenji Okuno 1048 Odakadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (4)

[Claims] 1. A receiving section (1) of a radio beacon information receiving section, a light receiving section (2) of an optical beacon information receiving photoelectric conversion section, and a light emitting section of an optical beacon information emitting photoelectric conversion section (3). Is provided on one surface of the insulating substrate (5).
In the CS antenna device, the receiving section (1) of the radio wave beacon information receiving means is formed by directly applying a metal film to the surface of the insulating substrate (5).
CS antenna device. 2. A plurality of light emitting portions (3) of the photoelectric conversion means for emitting light beacon information are provided on the one surface of the insulating substrate (5). 2. The VICS antenna device according to claim 1, wherein the light emitting section is electrically connected. 3. The light beacon information receiving optical-electrical converting means, wherein the light receiving section (2) is disposed on the surface of the receiving section (1) of the radio wave beacon information receiving means. The VICS antenna device according to claim 2. 4. A receiving section (4) of GPS information receiving means formed by directly applying a metal film to the surface of the insulating substrate (5) is also provided on the one surface of the insulating substrate (5). The V according to any one of claims 1 to 3, wherein
ICS antenna device.