JPH01276829A - On-vehicle receiver - Google Patents

Abstract

PURPOSE:To receive broadcasting having satisfactory receiving conditions even when a receiving electric field intensity is changed accompanying the movement of an automobile by displaying a map on the picture of a displaying means and displaying the distribution of the receiving electric field intensity of the receivable broadcasting station in a displayed area. CONSTITUTION:A radio receiver 1 is mounted on an automobile and used by connecting to a navigation device 2. A tuning circuit 22 executes a receiving action at the frequency corresponding to a control signal from a processing circuit 26, and related to the processing circuit 26, an input means 27 to set the broadcasting station, and a memory 29 to store the broadcasting station data given from a processing circuit 5 of the navigation device 2 through a bus 28 are provided. At this time, a map is displayed on the picture of the displaying means, and the distribution of the receiving electric field intensity of the broadcasting station, which can be received in the displayed area, can be displayed. Thus, the receivable broadcasting station can be received with a simple operation and selectively.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is provided with a display means, and displays a map of an area including the position where the own army is traveling on the display means, and displays the own army position on the map. The present invention relates to a receiving device that can be used in automobiles equipped with so-called navigation devices.

Conventional techniques such as frequency modulation broadcasting and television broadcasting are susceptible to restrictions due to topography due to the nature of radio waves, making it difficult to obtain a wide service area. For this reason, in addition to the main station, there are often relay stations installed at key locations that broadcast the same content on a transmission frequency different from that of the main station. When receiving radio waves from a relay station, there may be cases where radio waves from a relay station can be received more clearly.

Therefore, if you wish to receive broadcasts with the same content,
It is desirable to receive radio waves from the main island or relay station where the received electric field strength is highest at the receiving position.

In addition, when the car moves out of the service area of the main island or the relay station that it was receiving, the listener will not receive those broadcasts that are difficult to listen to.
Usually, a broadcasting station that can be well received at that location is selected. Therefore, it is desirable to know such receivable broadcasting stations.

Typical conventional technology does not use a configuration that allows information necessary for the above-mentioned reception operation, that is, the distribution of the electric field strength of radio waves from each broadcasting station, and therefore it is not possible to know the information necessary for the reception operation as described above. There was a desire for a configuration that would be able to receive broadcasts.

Problems to be Solved by the Invention An object of the present invention is to provide a vehicle-mounted receiver that can receive broadcasts under good reception conditions even when the received electric field strength changes as the vehicle moves. It is to be.

Means for Solving the Problems The present invention provides display means for displaying a map and distribution of received field strength of broadcasting stations on one screen, and for selectively receiving broadcasting stations displayed on the screen. This is an on-vehicle receiving device characterized in that it includes a receiving means for.

The present invention also provides a display means for displaying a map and a distribution of received field strengths of broadcasting stations on one screen, an operation position detection means for detecting an operation position on the screen, and a map displayed on the screen. a memory for sequentially storing the frequencies of broadcasting stations receivable at the position detected by the operating position detection means from broadcasting stations with a high received field strength to broadcasting stations with a low received field strength; The present invention is an in-vehicle receiving device characterized in that it includes receiving means for selectively receiving broadcast stations.

According to the present invention, a map is displayed on the screen of the display means, and the distribution of received field strengths of broadcast stations receivable in the displayed area can be displayed.

Therefore, from the position on the map, the operator can easily know which broadcast stations are receivable at, for example, his own military position, and by selectively receiving those stations, he can broadcast the desired content. It is possible to receive broadcasts under the most favorable reception conditions, or to receive broadcasts with favorable reception conditions.

Further, according to the present invention, a map is displayed on the screen of the display means, and the distribution of received field strengths of broadcast stations that can be received in the area displayed on the map can be displayed. The map is divided into a plurality of blocks, and the block selected by the operator's operation is detected by the operation position detection means. Broadcasting stations that can be received in the block detected in this way are stored in memory in order from the broadcasting station with the highest received field strength, and the broadcasting stations stored in memory in this way are selectively received by the receiving means. .

Therefore, broadcast stations that can be well received in the block selected by the operator are stored in the memory, and in this way, broadcast stations that can be received in the selected block can be selectively received with a simple operation. It becomes possible to do so.

Embodiment FIG. 1 is a block diagram showing a radio receiver 1 according to an embodiment of the present invention and the configuration related to this radio receiver 1. As shown in FIG. This radio receiver 1 is installed in a car, and is used as a navigation device l! It is used in connection with 2. The navigation device 2 is used in the following manner. That is, first, in response to an operator's operation from the input means 8, data read out by the decoder 4 from a so-called CDROM 3 in which data as shown in FIG. The drawing data is created in the display control circuit 6 via the display control circuit 6, and this drawing data is displayed as a map on the display section 7 realized by, for example, a cathode ray tube or a liquid crystal display device. The map is displayed in this way, and when the own army position is inputted from the input means 8, this own army position is displayed on the map displayed on the display section 7.

The processing circuit 5 includes a vehicle speed detector 11 , a geomagnetism detector 12 , and a steering detector 13 via an input/output circuit 10 .
etc. are connected, and after the initial information is input as described above, each of these detectors 11
Based on the detection values of ~13, the processing circuit 5
The data is read out from M3 as appropriate, and the display area is changed and the trajectory of the own army's position is displayed.

As shown in FIG. 2, the data read from the CDROM 3 is composed of four pieces of data D1 to D4, where data D1 represents the address number of the data and data D2 represents the address number of the data. Data D3 represents map management information such as connections and geomagnetic correction data for the area, and represents vector data, character codes displayed on the map, drawing data such as color coding, and data D4 represents the above-mentioned Station names of broadcast stations that can be received within the area stored in data D3,
and frequency, distribution of received electric field strength, and broadcast station data such as block data used when dividing the map stored in the data D3 into blocks as described later.

Corresponding to such data D1 to D4, a random access memory (hereinafter referred to as
A read-only memory (hereinafter referred to as ROM) 16 is provided for converting the character code in the data D3 into image data. A RAM 17 for temporarily storing image data is provided in association.

On the other hand, in the radio receiver 1, radio waves received by the antenna 21 are tuned by the tuning circuit 22, an acoustic signal is extracted by the detection circuit 23, and then amplified by the power amplifier circuit 24, and then converted into sound by the speaker 25. Ru. The tuning circuit 22 performs a receiving operation at a frequency corresponding to the control signal from the processing circuit 26, and in conjunction with the processing circuit 26, input means 27 for setting a broadcasting station as described later, and the navigation device 2 are connected to the tuning circuit 22. A memory 29 for storing broadcast station data provided from the processing circuit 5 via the bus 28 is provided.

As shown in FIG. 3, the input means 27 includes a plurality of, for example, five, channel selection keys 81 to S5, a memory key 86,
It includes a memory selection key S7 and a display key S8, and the memory 2 corresponds to the memory selection key S7.
9 are three storage areas Ml, M2 . Consists of M3. In the store area M1, broadcast stations that are frequently received, that is, favorite broadcast stations within the operator's living area are preset by the operator, and in the store area M2, as will be described later, broadcast stations that are received at the receiving point are automatically preset. Broadcasting stations with high received field strength are preset in order.

That is, the operator selects the store area M1 by operating the memory selection key S7, and then operates, for example, the channel selection key S1, and selects a frequently received broadcasting station corresponding to the channel selection key S1, that is, the operator By tuning in to a favorite broadcasting station among the broadcasting stations within the living area and operating the memory key 86, the received frequency of that broadcasting station is stored in the storage area M1 in correspondence with the tuning key S1. With respect to the remaining channel selection keys 82 to S5, it is possible to preset frequently received broadcasting stations by the same operation.

FIG. 4 is a diagram showing an example of the display on the display unit 7 when the display key S8 of the input means 27 is operated to display the service area, and is an example of an FM Mie broadcasting station.

In this case, the wooden horse U1 and the wooden horse U
A plurality of relay stations 02 to U6, which broadcast the same content as No. 1 and have mutually different transmission frequencies, are arranged in a scattered manner. In this Fig. 4, the area surrounded by solid lines is for each station U1 to U.
6 indicates a range in which the received electric field strength of radio waves from 6 is 66 dB or more, the area surrounded by the - dotted chain line indicates a range of 60 dB or more, and the area indicated by a two-dot chain line indicates a range of 48 dB or more.

Further, a transparent panel switch 18, which is a means for detecting the position of the operating ear, is arranged on the display section 7, and when the map is displayed as shown in FIG. The map is divided into 42 blocks of 7×6, which are the minimum map units. Therefore, when your army is within the diagonally shaded block indicated by reference mark P1, it is desirable to receive radio waves from the main island U1, and when you move to block P2, it is desirable to receive radio waves from relay station U2. This is desirable.

On the other hand, when the operator specifies the block P1 while only the map is displayed, the block P1
Receivable broadcast stations and their frequencies are displayed as shown in FIG.

That is, in the store area M2, the panel switch 18
When the block P1 is specified by operating the block P1, the broadcast stations that can be received in this block P1 correspond to the electric field strength distribution that can be recognized from the broadcast station data.
The frequencies of the broadcasting stations with the highest received field strength in block P1 are automatically stored corresponding to the channel selection keys s1 to S5. At this time, the station name of the broadcasting station stored in the store area M2 is stored in the store area M3 in correspondence with the frequency. The stations stored in this way, for example Ul, U7, are marked with the remaining reference marks [2, U3, U4 . U5. U6. U
8. This is clearly distinguished from the non-preset broadcast station indicated by U9. Broadcast station U displayed in this way
In the vicinity of U7, there is a broadcast station 01.1. The broadcasting station name and transmission frequency of U7 are displayed, and the selection key S1 is
Preset channels showing correspondence with S5 are displayed as, for example, CHI and CH2. The electric field strength distribution as shown in the above-mentioned No. 411U,
The broadcast station display as shown in FIG. 5 can be selected by operating the display key S8 as described above.

In the radio receiver 1 configured as described above, when the display of a broadcasting station is selected by the display key S8, a program is stored in the storage area M2 by operating the memory selection key S7 and the channel selection keys 81 to S5. When a broadcasting station is selected, the name of the broadcasting station is read from the store area M3 and displayed on the screen together with its transmission frequency. Further, within the living area of the operator, there is a store area Ml.

When the stored contents of M2 overlap and the frequency stored in the store area M1 is selected by the memory selection key S7 and the channel selection keys 81 to S5, a search for the corresponding frequency in the store area M2 is performed. After that, the broadcasting station name corresponding to that frequency is read out from the store area M3 and displayed.

In this way, when the frequency of the most frequently received broadcast station stored in the store area M1, that is, the frequency of the broadcast station within the living area, is preset, and the ivJ goes out of the living area, the frequency of the broadcast station in that area is stored in the store area M2. Since frequencies with high reception field strengths are stored in sequence, the operator can broadcast broadcasts with unfavorable reception conditions to his own military position by simply operating the memory selection key S7 and channel selection keys 81 to S5. By operating the display key S8, the name of the broadcasting station can be received, and the operability can be greatly improved, and the name of the receiving broadcasting station can be displayed accurately.

Furthermore, when storing reception frequencies in the storage area M2, the frequencies are stored in descending order of stored reception electric field strength based on the reception electric field strength data stored in advance in the CD ROM 3 as described above. Rather than presetting, for example, in a configuration where the so-called auto scan function is used to sequentially store frequencies starting from the frequencies with the highest actual received field strength at the friendly position, even if the frequencies have a high received field strength, If such a preset operation is performed when the received electric field strength becomes temporarily low while the car is driving, for example behind a building or while passing through a tunnel, even though the electric field strength is high, In contrast, in the radio receiver 1 according to the present invention, there is no such problem and the frequency is not preset, and the storage area is sequentially stored starting from the broadcasting station with the highest reception field strength. Stored in M2.

The frequency of the broadcast station in any block can be stored in this storage area M2, and therefore it is possible to preset the frequency of the broadcast station at the destination before departure, regardless of the position of the own army.

Furthermore, even if a new broadcasting station or relay station is established due to the increase in the number of broadcasting stations or relay stations, this can be easily handled by replacing the CDROM 3.

FIG. 6 is a flowchart for explaining the dynamics. In step rr1, the navigation device 2 is used to determine whether a map display is selected;
If so, the process moves to step n2, and the area data corresponding to the input from the input means 8 is read out from the CDROM 3 and displayed on a map. In step [13, it is determined whether the panel switch 18 has been operated, and if so, in step n4, the block selected by the operation, for example, P1, is read, and in step n5, the broadcast that can be received in that block P1 is read. Station data is read from CDROMB. The frequency data, electric field strength data, and broadcasting station name read in this way are
In step n6, the store area M2 of the memory 29. M3, and in this way, broadcast stations that can be received in block P1 are preset in the order of the received electric field strength, corresponding to the channel selection keys 81 to S5. step ri 6
When the broadcasting station display is selected by the display key S8, the broadcasting station preset in step n7 displays the name of the broadcasting station being received, its transmission frequency, and the preset channel as shown in FIG. After the display is performed, the operation ends.

If the panel switch 18 is not operated in step n3, the process moves to step n8, and the input means 8.27
It is determined whether or not another operation is being performed. If not, the process returns to step n3, and if so, the process moves to other processing operations.

In the above embodiment, the panel switch 18 was used to specify the blocks PL, P2, etc.
As another embodiment of the present invention, a pair of light receiving and emitting elements Kl, 2, Ll, L2 as shown in FIG.
The optical paths kl, 11 formed by the above may be arranged in a matrix on the display section 7, and the portion where the optical paths kl, 11 are interrupted may be read as the block P1 or P2.

Further, in the above-mentioned embodiment, the electric field intensity distribution as shown in FIG. 4 is displayed in response to the input operation from the input means 27. As indicated by diagonal lines, the service area P3 of the broadcasting station UIO selected by the input means 27 may be displayed in different colors.

The radio receiver 1 according to the present invention does not necessarily have to operate in conjunction with the navigation device 2; in other words, as long as it has a configuration that can read at least the data D1 to D4 from the CD ROM 3 and display a map, the radio receiver 1 does not necessarily have to operate in conjunction with the navigation device 2. It becomes possible to select PL and P2.

Effects of the Invention As described above, according to the present invention, a map can be displayed on the screen of the display means, and the distribution of received field strengths of broadcast stations receivable in the displayed area can be displayed. As a result, the operator can easily know the broadcasting stations that can be received at the location of his own army, for example, from the position on the map, and can receive the desired content by selectively receiving those broadcasting stations. can receive broadcasts under the most favorable conditions, or can receive broadcasts with favorable reception conditions.

Further, according to the present invention, a map is displayed on the screen of the display means, and the distribution of received field strengths of broadcast stations receivable in the area displayed on the map can be displayed. The displayed map is divided into multiple blocks, and the broadcast stations that can be received in the block selected by the operator's operation are stored in order from the station with the highest received field strength. Therefore, it becomes possible to selectively receive broadcast stations receivable in the jx selected blocks with a simple operation, and operability can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a radio receiver 1 according to an embodiment of the present invention and its related configuration, and FIG. 2 is a block diagram showing a CD ROM.
37 is a diagram showing a specific configuration of the input means 27, and FIG.
FIG. 5 is an example of the display on the display section 7 showing the distribution of the received field strength of the broadcast station selected by the block P1. FIG. 6 is an example of the display on the display section 7 when block P1 is selected. Flowchart, No. 7 [! 8 is a diagram showing the arrangement of the light receiving and emitting elements Kl, 2:Ll, and L2 for detecting the selection operation of blocks PI and P2 according to another embodiment of the present invention, and FIG. This is a display example of the display unit 7 when displaying the service area P3 of the broadcast station U10. 1... Radio receiver, 2... Navigation device,
3...CDROM, 4...Decoder, 5.26...
- Processing circuit, 6... Display control circuit, 7... Display unit,
8.27... Input means, 18... Panel switch,
25...Speakers, 2...Memory, Ml~M3・
...Store area 5, Ul ~ UIO... Broadcasting station agent Patent attorney Keibu Saikyo Figure 1 1M2 Figure 4 Figure 3 Figure/27 5th cause Figure 6

Claims (2)

[Claims] (1) Includes display means for displaying a map and distribution of received field strengths of broadcast stations on one screen, and reception means for selectively receiving broadcast stations displayed on the screen. An in-vehicle receiver featuring: (2) display means for displaying a map and distribution of received field strength of broadcasting stations on one screen; operation position detection means for detecting an operation position on the screen; and an operation position detection means for detecting an operation position on the screen; , a memory for sequentially storing the frequencies of broadcast stations receivable at the position detected by the operation position detection means from broadcast stations with a high received field strength to broadcast stations with a low received field strength; 1. A vehicle-mounted receiving device comprising: receiving means for selectively receiving broadcast stations.