JPH0865183A - Radio receiver having time display function - Google Patents

Abstract

PURPOSE: To reduce the operating current by discriminating the presence of time setting so as to on/off time display without individual changeover means when the radio receiver is turned off. CONSTITUTION: The inside of a microcomputer 12 discriminates it that the radio receiver is turned off, and when a time control section 9 sets a time and the time is normally counted, a display drive circuit 10 displays the time onto a display device 11. When the time is not set, the time is not displayed. When the radio receiver is turned on, the radio receiver consisting of a frequency synthesizer reception section 2 and an AF circuit 3 is operated to display the frequency in the reception state. Furthermore, when the power is interrupted from the receiver to stop time count, the time is not displayed on the display device 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio receiver having a time display function.

[0002]

2. Description of the Related Art A conventional radio receiver having a time display function, when the radio receiver is in an operating state (radio ON state), the band of the broadcast being received and its reception frequency,
In some cases, the operating state of the receiver is displayed on the display, and the time is displayed when the radio receiver is not operating (radio OFF state).

[0003]

However, since the radio receiver having the conventional time display function as described above is configured to display the time when the radio receiver is not operating (radio OFF state). Even if the time is not set, it is necessary to perform some kind of display, for example, a flushing display indicating that the time is not set. In addition, a user who does not need the time display function is annoyed because the display is displayed even when the radio is off, and the reference oscillation of the microcomputer must always be driven, which deteriorates the battery life. It is also a factor causing it to be uneconomical. In addition, there is a problem that a separate switch is required to prevent such time display.

The present invention is intended to improve the above-mentioned conventional problems, and is to automatically determine the presence or absence of the time counting state in the radio OFF state, and in the case where the time display function is not required in the radio OFF state. Aims to provide a radio receiver having a time display function that does not display.

[0005]

To achieve the above object, a radio receiver having a time display function according to the present invention receives an output from a radio tuning means and selects a frequency synthesizer receiving section including a PLL circuit. Tuning control means for performing, a time setting key provided for setting the time, a time control means for counting the time by setting the time setting key, and a display for displaying the reception frequency and time. A display drive unit for receiving an output from the channel selection control unit or the time control unit and displaying the reception frequency and the time on the display device as required.

[0006]

According to the present invention, with the above-described structure, the time is displayed on the display when the radio receiver is in the OFF state and the time is set by the time setting key and when the time control means is counting the correct time. When the time is not set, the time control means switches the display drive means so that the time display is not performed by the display even if the radio receiving section is in the OFF state, so that the time is not set. This eliminates the need for display, eliminates the inconvenience of display, and reduces the operating current in the radio OFF state.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a radio receiver having a time display function of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of a radio receiver having a time display function according to an embodiment of the present invention. In FIG. 1, a radio receiving antenna 1, a frequency synthesizer receiving section 2 for performing a radio receiving operation by a PLL system, an AF circuit 3 for amplifying a detected audio signal and a speaker 4 constitute a radio receiving section.

Further, a radio tuning key (radio tuning means)
5, radio on / off key 6 for operating the power of the radio receiver, time setting key 7 for setting the time and starting the time counting, receiving signals from the radio tuning key 5 and controlling the frequency synthesizer receiver 2 A frequency control unit (channel selection control unit) 8, a time control unit (time control unit) 9 that receives a signal from the time setting key 7, and controls a time counter.
A display drive circuit (display drive means) 10 for displaying the reception frequency and the current time and a display 11 for displaying a signal controlled by the display drive circuit 10 are provided, and the frequency control section 8 and the time control section 9 are displayed. The control unit 12 is configured by one microcomputer in order to control the drive circuit 10 in conjunction with each other.

The operation of the radio receiver having the time display function of the present invention configured as described above in the radio OFF state will be described with reference to the flowchart of FIG. First, in step S1, the time control unit 9 selects the radio O
Check if the FF information is input, the time is set, and the time is normally counted. If the time is normally counted, the process proceeds to step S1-1, and the display drive circuit 10 causes the display 11 to display the current time.
Further, at this time, the time display is turned on even when the time is set by the time setting key 7 to set the time. The time is continuously displayed unless a condition occurs such as when the radio is turned on, when the time setting operation is performed, or when the power supply to the device is stopped and the time counting is stopped.

If the time is not counted in step S1, the process proceeds to step S2, and the display of the current time on the display 11 by the display drive circuit 10 is turned off. At this time, the display can be turned off, and at the same time, the control unit (microcomputer) 12 can be put in a standby state to reduce the current consumption of the device. In the standby state, the state of step S2 is maintained until the time setting key is pressed, and the operation of the circuit necessary for displaying is stopped to prevent unnecessary current consumption.

Next, in step S3, it is confirmed whether or not the time setting key 7 for starting the time setting is pressed. If the time setting key 7 has not been pressed and the time setting has not started, the process moves to step S4 and the display is turned off to enter the standby state. When the time setting key 7 is pressed in step S3 to enter the time setting start state, the process proceeds to step S3-1 to turn on the time display and at the same time indicate that the time setting start state is set. Start blinking. It should be noted that the blinking of the display is unnecessary when there is an individual item indicating that the time setting is started.

At step S3-2, the operation of the time setting key 7 is accepted to set the time, and then step S3-
Move to 3. In step S3-3, the operation that the time setting performed in step S3-2 is completed is confirmed, and if the user cancels the time setting state, the process moves to step S4 and the display of the display unit 11 is turned off to set the standby state. Become. When the time setting completion operation is performed, step S
After shifting to 3-4 and stopping the blinking of the time display, the time counting is started in step S3-5 and the time which changes every moment is displayed on the display unit 11.

Although the radio OFF state is shown in the flow chart of FIG. 2 here, the radio ON / OFF key 6 is pressed to turn the radio ON in any step state.
In the N state, the radio receiver including the frequency synthesizer receiving unit 2 and the AF circuit 3 is operated to display the frequency in the receiving state. Further, in any step state, when the power supply to the device is stopped and the time counting is stopped, the time display on the display unit 11 is not performed.

As described above, according to this embodiment, by providing the control section for judging the time setting state and switching the time display, it is necessary to provide an individual switching means for determining whether the time display is required while the radio is off. It is possible to switch the display without turning on and off, and when the display is turned off, it is possible to prevent the consumption of unnecessary current by stopping the operation of the circuit necessary for displaying, and to reduce the operating current in the radio off state. It is possible.

In the embodiment, the reception frequency display and the time display are performed by the same display unit 11. However, even when the time display is performed by an independent display unit, the time setting state is judged and the time display is turned ON. It goes without saying that it is possible to switch on / off.

[0016]

As described above, according to the present invention, the microcomputer which is used as the tuning control means or the time control means determines the time setting state and controls the time display switching, and the radio receiver. Is set to OFF and is in the time display state, and when the time is set, or when the time control means is counting the correct time, the time display is configured to display the time unset display. Is unnecessary, and the annoyance of time unset display is eliminated, individual switching means is not necessary, and unnecessary current is stopped by stopping the operation of the circuit necessary for displaying in the radio OFF state. Therefore, it is possible to realize a radio receiver having an excellent time display function that can prevent the consumption of power and reduce the operating current.

[Brief description of drawings]

FIG. 1 is a block diagram of a radio receiver having a time display function according to an embodiment of the present invention.

FIG. 2 is a flow chart showing the control procedure of the same.

[Explanation of symbols]

 1 Radio receiving antenna 2 Frequency synthesizer receiving unit 3 AF circuit 4 Speaker 5 Radio tuning key 6 Radio on / off key 7 Time setting key 8 Frequency control unit 9 Time control unit 10 Display drive circuit 11 Display unit 12 Control unit (microcomputer)

Claims (1)

[Claims] 1. A PL after receiving an output from a radio channel selection means.
A tuning control means for selecting a frequency synthesizer receiving section including an L circuit; a time setting key provided for setting the time; and a time control means for counting the time by setting the time setting key, A display device for displaying the reception frequency and the time, and a display drive device for receiving the output from the tuning control means or the time control means and displaying the reception frequency and the time on the display device as necessary, When the radio receiver is in the OFF state and the time is set with the time setting key and when the time control means is counting the correct time, the time is displayed on the display unit and the time is set. In a state where it is not performed, the time control means switches the display drive means so that the time display by the display is not performed even when the radio receiver is in the OFF state. Radio receiver having a time display function, wherein the door.