JP3395433B2 - Tuning receiver - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuning receiver having an automatic preset function for sequentially scanning the reception band of a tuner section and automatically storing reception frequency information of broadcast waves having a predetermined reception level or higher. Is.

[0002]

2. Description of the Related Art A conventional tuning receiver of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-172707. This is an auto-preset function that is controlled by a microcomputer to sequentially sweep through the reception band and automatically store in the preset memory the reception frequency information of broadcast waves with a predetermined reception level or higher or broadcast waves with a high reception level. In the electronic tuning receiver having, the microcomputer operates the auto-preset function when the microcomputer is connected to a power source and when a predetermined switch operation is performed.

A tuning receiver having such a characteristic is first provided when a microcomputer for controlling the auto preset function is connected to a power source and when a predetermined switch operation is performed, or after the microcomputer is connected to the power source. When the power switch of the receiver is operated and the predetermined switch is operated, the auto preset function is operated. This allows
When power is first supplied to the receiver, the optimum reception frequency information can be given to the preset memory without using a non-volatile memory, and thereafter the storage state of the preset memory is not undesirably changed. .

[0004]

However, in the conventional tuning receiver as described above, the reception frequency information of the broadcast wave above a predetermined reception level is automatically stored by connecting the power supply. However, since the power supply is connected even after the preset is completed and the electric power is constantly supplied to the control device and the like, there is a problem that the electric power is wasted. Also, every time the power supply is restored after a power outage, or whenever the plug is unplugged from the power supply and then plugged back in to the power supply, the preset mode is automatically entered, and each time the settings are reset. There was also a problem that it took an unnecessary time for presetting, and it was not possible to watch or listen to the broadcast at almost the same time as turning on the power.

The present invention has been made in view of the above conventional problems, and by connecting a power source in a state where the antenna is connected to the tuner section, the power is automatically turned on to perform presetting. The object of the present invention is to provide a tuning receiver that automatically turns off the power after the preset is completed.

[0006]

In order to solve the above-mentioned problems and to achieve the above-mentioned objects, the present invention provides an antenna for receiving a broadcast wave in a circuit connecting a control device and a connecting means. A switch means that is turned on when connected to the tuner unit is provided, and the control device operates the automatic preset function when the connecting means is connected to the power supply and the switch means is on, and the power supply is turned on after the operation of the automatic preset function is completed. It is characterized by blocking.

[0007]

The present invention has the above-mentioned configuration,
By connecting the power supply with the antenna connected to the tuner, the power is automatically turned on to activate the automatic preset function to execute the preset operation, and the power is automatically turned off after the preset is completed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block explanatory diagram applied to a video tape recorder (hereinafter referred to as "VTR") showing an embodiment of a tuning receiver of the present invention.

As shown in FIG. 1, the VTR 1 comprises a control device 2, a tuner section 3, a display section 4, a light receiving section 5 and a power connection switch 6. The control device 2 is composed of, for example, a one-chip type microcomputer, and mainly based on a control unit 7 that outputs a control signal for controlling the operation of the entire VTR 1 and a control signal output from the control unit 7. It has a channel selection section 8 for performing a preset operation and the like. Such a microcomputer includes, for example, an arithmetic processing unit (CPU) for 4-bit parallel processing and a storage unit (R) in which a predetermined processing program or the like is written in advance.
OM), a storage device (RAM) having a channel storage area, a preset state storage area, and other storage areas in which information can be written and rewritten, and an input / output interface for controlling signal input / output.

The control unit 7 of the control device 2 having such a configuration is connected to the light receiving unit 5 for the remote control, which receives the signal emitted from the remote control (hereinafter referred to as "remote control") 9. The control unit 7 performs a predetermined calculation process based on the signal input from the light receiving unit 5. Based on the result of this arithmetic processing, the control unit 7 inputs a signal relating to the preset operation to the tuning unit 8, and the tuning unit 8 sends a predetermined control signal based on the input signal to the tuner unit 3 and the display unit 4.
And supply to.

The tuner section 3 is connected to a television 10 provided outside, and signals are exchanged with the television 10 via the tuner section 3. The tuner section 3 automatically executes a preset search under the control of the channel selection section 8. That is, the tuner unit 3 sequentially scans the reception band based on the control signal from the channel selection unit 8 and sequentially inputs the information regarding the received signal to the channel selection unit 8. Based on the input signal from the tuner unit 3, the tuning unit 8
Then, the reception level of the received signal is compared with a preset reference level, and when the reception level of the reception signal is higher than the reference level, the reception frequency information of the broadcast wave is automatically stored. This series of preset operations is an automatic preset function, and the operation of the tuner section 3 is visually displayed on the display section 4 at the same time.

A connection terminal 12 for an antenna 11 that receives a broadcast wave is connected to the tuner section 3. Between the connection terminal 12 and the antenna 11, a specific example of switch means is shown. An antenna switch 13 is provided. This antenna switch 13 is used for the antenna 11
And a switch receiving piece 13b provided on the connection terminal 12 side. For example, the switch piece 13a is formed in a cap nut shape and the switch receiving piece 13b is formed in a screw shaft shape. The antenna switch 13 can be turned on by screwing and connecting both the members 13a and 13b.

The antenna switch 13 having such a configuration is configured to mechanically interlock with the power source connection switch 6, and the power source connection switch 6 is turned on only when the antenna switch 13 is turned on. The circuit can be closed. Therefore, the antenna switch 1
When 3 is off, that is, when the cable of the antenna 11 is not connected to the connection terminal 12, the power connection switch 6 is in the off state, and the circuit is open.

The power supply connection switch 6 is provided in the circuit that connects the plug 14 and the control device 2 showing a specific example of the connection means. Therefore, when the power supply connection switch 6 is in the off state, the power cannot be supplied to the control device 2 even by inserting the plug 14 into the AC power supply, which is a specific example of the power supply.

A tuning receiver having such a configuration is
The preset operation is automatically started by connecting the plug 14 to an AC power source, and after the preset operation is completed, the power is automatically shut off while maintaining the preset state, and the state before the power is turned on is restored. .

First, the antenna switch 13 is screwed to connect the switch piece 13a and the switch receiving piece 13b to turn on the antenna switch 13, and the antenna 11 is connected to the VTR1.
Connected to the tuner section 3 of. At the same time, the power supply connection switch 6 mechanically interlocking with the antenna switch 13 is turned on, and the circuit connecting the control device 2 and the plug 14 is closed. Therefore, when the antenna 11 is not connected to the tuner section 3 of the VTR 1, the power supply connection switch 6 maintains the off state because the antenna switch 13 is not turned on. Therefore, connect the plug 14 to the AC power supply in this state. However, no power is supplied to the control device 2.

Next, when the plug 14 is connected to the AC power source while the power source connection switch 6 is turned on, the power of the AC power source is supplied to the control section 7 of the control device 2 through the power source connection switch 6. It As a result, a trigger signal is applied to the control section 7, and the control section 7 starts operation by this trigger signal to supply power to the entire VTR and supply a signal to the channel selection section 8 to start operation. As a result, the tuning unit 8 operates the tuner unit 3 based on a predetermined program stored in the storage device in advance, and automatically starts the preset search.

That is, the tuner section 3 sequentially scans the reception band based on the control signal output from the channel selection section 8 to detect the reception level of the received broadcast wave, and the reception frequency related to the detected reception level. Information is supplied to the channel selection unit 8. The channel selection unit 8 which has received the reception frequency information compares the reception level of the detected reception frequency with the reference level stored in the storage device in advance. When the reception level is higher than the reference level as a result of the comparison by the channel selection unit 8, it is determined that there is a broadcast station that outputs a broadcast wave having a frequency of a predetermined magnitude (stationed), and the reception frequency is determined. The data is stored in the channel storage area provided in the storage device.

On the other hand, as a result of the comparison by the channel selection unit 8, when the reception level is lower than the reference level, it is determined that there is no broadcasting station that outputs a broadcasting wave having a frequency of a predetermined magnitude (no station), The received frequency is not stored in the channel storage area, but the next frequency information is searched. By performing such frequency information search over the entire reception band of the tuner unit 3, the storage unit of the channel selection unit 8 stores a number of stations corresponding to the number of stations radiating broadcast waves having an output of a predetermined level or higher. Station information is recorded in the channel storage area.

After the completion of the search based on the automatic preset function, the tuning unit 8 outputs a control signal to the display unit 4 to display the first channel of the channel storage area in which the station information is recorded on the display unit 4. . This completes the preset operation automatically performed based on the automatic preset function. As a result, by selecting and operating a preset switch set corresponding to each channel storage area, the frequency value stored in that channel storage area is read out by the channel selection unit 8, and a predetermined control signal is output from the tuner. Part 3
Is output to. As a result, the tuner unit 3 is automatically scanned and matched with the selected station, the corresponding broadcast wave is received, and the video and audio of the receiving station is reproduced by the television 10.

Thereafter, the control unit 7 sets a flag in the preset state storage area of the storage device 2 and stores that the automatic preset is completed. This allows plug 1
When the plug 14 is reinserted into the AC power supply after pulling out 4 from the AC power supply, the control unit 7 first determines the storage state of the preset state storage area, and as a result of the determination,
The automatic preset function is activated only when the flag is not set in the preset state storage area, and the automatic preset operation is not performed when the flag is set in the preset state storage area. Therefore, after the plug 14 is pulled out from the AC power source after the preset operation is completed,
Is connected to an AC power source, or when the line is restored after a power failure and power is supplied again, the tuning operation can be performed immediately without performing the automatic preset operation.

The flag in the preset state storage area can be released by a preset release signal output from a preset release circuit provided in the remote controller 9.
When the flag of the preset state storage area is released in this way, the automatic preset function operates after that, and the above automatic preset operation is repeated again.

Further, once preset, the automatic preset function of the controller 2 does not work even if the plug 14 is subsequently connected to an AC power source. Therefore, in this embodiment, the menu system by manual operation is used. It is also possible to perform the preset operation of. The preset operation according to the menu system is performed by inputting a predetermined program into a storage device in advance, and when the menu-based preset operation is selected, for example, a necessary operation procedure is sequentially displayed on the television 10, Try to preset manually.

After the preset operation as described above is completed, the control unit 7 controls the power supply to be automatically turned off while the preset is held, and the power is turned off to return to the state before the power was turned on. Therefore, the extra power is not supplied to the VTR 1 until the power switch is turned on thereafter, so that wasteful consumption of the power can be prevented.

As described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, an example in which an AC power source is used as a power source has been described, but a DC power source such as a battery or a dry cell is used. Of course, it is okay. In this case, when the power source is a car battery,
The connecting means to the power supply is not the plug but the terminal connecting device for grasping the terminal of the battery. Further, in the above embodiment,
The example in which the remote controller 9 is provided separately from the VTR 1 has been described, but the function of the remote controller 9 is built in the main body of the VTR 1,
The VTR1 main body may be directly operated.

Further, in the above-described embodiment, an example in which the tuning receiver is applied to a VTR has been described, but in addition to this, the invention can be applied to various electronic devices such as a VTR integrated television and a radio. . As described above, the present invention can be variously modified without departing from the spirit thereof.

[0027]

As described above, according to the present invention,
Provided between the control device having the automatic preset function and the connection means for connecting the control device to the power supply is a switch means which is turned on when the antenna for receiving the broadcast wave is connected to the tuner section, and the connection means is used as the power supply. When connecting and turning on the switch means, activate the automatic preset function,
Since the power is shut off after the operation of the automatic preset function is completed, it is possible to complete the time-consuming preset operation only once, and to prevent unnecessary power consumption after the preset is completed. It is possible to provide a tuned receiving device which is easy to operate and economical. Moreover, the preset is not released by connecting / disconnecting the connecting means due to plugging / unplugging, restoration of power supply after power failure, etc., and when connecting the connecting means to the power supply again, the preset operation is not performed immediately. An effect that a tuning operation can be executed is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

1 VTR (tuning receiver) 2 controller 3 tuner section 4 Display 5 Light receiving part 6 power connection switch 7 control unit 8 tuning departments 9 Remote control 10 television 11 antenna 12 connection terminals 13 Antenna switch (switch means) 14 plugs (connection means)

─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-6-132785 (JP, A) JP-A-4-172707 (JP, A) JP-A-55-93316 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) H03J 5/00-7/28 H04B 1/16 H04N 5/44

Claims (2)

(57) [Claims] 1. A control device having an automatic preset function for sequentially scanning the reception band of a tuner section and automatically storing reception frequency information of broadcast waves of a predetermined reception level or higher in a preset memory, and a power supply for the control device. In the tuning receiver including a connecting means for connecting to the tuner, a switch means to be turned on when an antenna for receiving the broadcast wave is connected to the tuner section in a circuit connecting the control device and the connecting means. The control device operates the automatic preset function when the connecting means is connected to the power source and the switch means is on, and shuts off the power source after the operation of the automatic preset function is completed. Tuning receiver. 2. The tuning receiver according to claim 1, wherein the control device operates the automatic preset function only once when the connecting means is connected to the power supply. .