JPH02141034A - Displaying control system for radio selective calling receiver - Google Patents

Abstract

PURPOSE:To prevent the sensitivity due to a noise occurring due to a displaying operation from being lowered by stopping the displaying operation of a message during the operation period executing the reception processing in response to the arrival of a desired signal. CONSTITUTION:For a displaying control circuit 25, an intermittent reception operation signal (a) is inputted through an inverting circuit 26, only while both intermittent reception operation signal (a) from the inverting circuit 26 and displaying control signal from a decoder 17 become 'H', the displaying control circuit 25 sends a signal to execute the displaying operation to a central processing unit(CPU) 27, drives an LCD 28 and displays the message. When a time-up signal showing the prescribed time passage is inputted from a timer 32, the decoder 17 makes the displaying control signal to the displaying control circuit 25 into 'L'. Accordingly, when the displaying of the message by the LCD 28 is executed when the intermittent reception operation signal (a) outputted from the decoder 17 becomes 'L', namely, outside the reception operation period, and the displaying is executed only for the prescribed time by the timer 32. In such a manner, the lowering of the receiving sensitivity is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a message display control system in a radio selective calling receiver.

[Conventional technology]

The wireless selective call receiver receives a wireless signal transmitted from the base station, determines whether the received signal includes a selective call number assigned to itself in advance,
If a message is included in the received signal, the caller is notified of the call by blinking an LED or driving a speaker, and as an additional function, if a message is included in the received signal, the message is sent to the LCD (Liquid Crystal).
The display is displayed on a display such as an Al Display), and all driving power is provided by an internal battery.

Therefore, it is important to keep power consumption low and extend battery life. For this reason, operations that require relatively large power consumption, such as receiving processing in response to the arrival of a desired signal, are executed intermittently, and during other periods, only the minimum functions necessary to reduce power consumption are performed. A wireless selective calling receiver with an intermittent reception function has been proposed.

[Problem to be solved by the invention]

The above-mentioned wireless selective calling receiver with an intermittent reception function can reduce average power consumption.
It becomes possible to use the wireless selective call receiver for a long period of time by replacing the battery once.

By the way, in this type of radio selective call receiver with an intermittent reception function, a message is conventionally displayed on a display such as an LCD immediately upon receiving a call. Therefore, the display is performed even during a period in which the receiver performs a receiving operation in response to the arrival of a desired signal. However, when a display device such as an LCD is in operation, a central processing unit (Central Processing [1
Harmonic noise generated from the unit HCP U) enters the radio section of the receiver, causing a decrease in the receiver's signal-to-noise ratio (S/
Therefore, if there is a call while a message is being displayed, there is a problem in that the sensitivity is lower than when there is no display due to the influence of the above-mentioned noise.

The present invention aims to prevent such a decrease in sensitivity.

[Means for Solving the Problems] In order to achieve the above object, the present invention intermittently executes an operation of performing reception processing in response to the arrival of a desired signal, and receives a call containing a self-selected calling number. In a wireless selective calling receiver that notifies a call upon reception of a signal and displays a message included in the call signal on a display, the operation of displaying the message on the display is stopped during a period in which the reception process is performed. That's what I do.

[Effect]

In the display control method of the wireless selective calling receiver of the present invention, if a message is included in the received signal, the message is displayed on the display, but at this time, in response to the arrival of the desired signal, the message is displayed on the display. During the operation period in which reception processing is performed, the display operation is stopped to prevent a decrease in sensitivity due to noise generated due to the display operation.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a flowchart showing the operation of an embodiment of the display control method for a radio selective calling receiver according to the present invention. As shown in the figure, when the wireless selective call receiver of this embodiment is powered on, it first performs initial settings of each part and enters the intermittent reception operation state (Sl), and then selects the selection assigned to it. When a calling signal containing a calling number is received (32
), the intermittent reception operation state is temporarily suspended (S3), and the call notification by sound and blinking of the LED is started (S4).
, the call notification is stopped after a predetermined time has elapsed (S5). Next, the message contained in the received signal is stored in the internal memory, and the intermittent reception operation state is resumed (S6). Thereafter, it is detected whether the message readout switch has been pressed and whether or not a call signal including the self-selected call number has been received again (S7 314). When it is detected in process S7 that the message readout switch has been pressed, if the receiver is not currently in a period (hereinafter referred to as a receiving operation period) in which it performs a receiving operation in response to the arrival of a desired signal (58 DeN
o), the message stored in the memory is started to be displayed on a display such as an LCD (S9). This message is displayed after a predetermined time has elapsed (310).
Stop (S11). Furthermore, if the receiver enters the reception operation period before the predetermined time mentioned above has elapsed,
In the meantime, the display is temporarily interrupted (38, 312).

Also, when the message readout switch is pressed,
If the receiver is in the receiving operation period (if YES in S8)
, does not start displaying at that point (S12), but starts displaying when the receiver enters the next receiving operation period (S8.
S9). Similarly, the display is stopped after a predetermined time (S10°5ll). Furthermore, when a call signal including the self-selected call number is received during the receiving operation period (S13), the process proceeds to step S3 and the same operation as described above is performed, and the message reading switch is pressed. Even when a call signal including the own selected call number is previously received (S14), the process proceeds to step S3 and the same operation as described above is performed.

FIG. 2 is a block diagram showing an example of a radio selective calling receiver to which the present invention is applied, and the antenna 14. Radio section 15
．． Waveform shaping circuit 16. decoder 17, this decoder 17
A crystal oscillator 18. A writable read-only memory such as PROM19. Speaker driving amplifier circuit 20, LED driving amplifier circuit 21. Speaker 22° LED 23. Message readout switch 24
゜Display control circuit 251 Inversion circuit 26. CPU27゜LC
D28. DC-DC converter 29. Power switch 30
．． ii pond 31 and a timer 32.

In FIG. 2, a selective calling signal received by an antenna 14 is amplified and demodulated by a radio section 15, and is input to a waveform shaping circuit 16. The waveform shaping circuit 16 includes a decoder 17
The intermittent reception operation signal a sent from the intermittent reception operation signal a operates during the logic "H" period indicating the reception operation period, and the input signal is waveform-shaped and applied to the decoder 17. The decoder 17 generates an intermittent reception operation signal a that alternately changes to "H" and "L" at a predetermined period, and during the "H" period, the radio selective call receiver responds to the arrival of a desired signal. The reception operation is performed, and during the "L" period, only the minimum necessary functions are operated in order to reduce power consumption.Now, decoder 1
When the waveform-shaped received signal is input from the waveform shaping circuit 16, 7 determines whether or not the received signal contains the same selective call number as the own selective call number stored in the PROM 19. However, when it is included, the speaker drive amplifier circuit 20 and the LED drive amplifier circuit 21 are controlled to generate a sound from the speaker 22 and blink the LED 23, thereby notifying the carrier of a call. Further, the decoder 17 stores the message included in the received signal in its internal memory.

After that, the message readout switch 2 is pressed by the carrier.
4 is pressed, the decoder 17 detects this, passes the message stored in the internal memory to the display control circuit 25, and sends a display control signal of logic "H" to the display control circuit 25 indicating that display is to be started. At the same time, the timer 32 is started.

The display control circuit 25 receives the intermittent reception operation signal a via the inversion circuit 26, and the display control circuit 25 receives both the intermittent reception operation signal a from the inversion circuit 26 and the display control signal from the decoder 17 as " Only during the period when it is “H”, C
A signal to perform a display operation is sent to the PU27, and the CPU2? The LCD 28 is driven to display a message. Further, when the time-up signal indicating the elapse of a predetermined time is inputted from the timer 32, the decoder 17 sets the display control signal to the display control circuit 25 to "L" as a result of 0 or more.
The message is displayed on the LCD 2B when the intermittent reception operation signal a outputted from the decoder 17 is "L", that is, outside the reception operation period, and for a predetermined period of time determined by the timer 32.

〔Effect of the invention〕

As explained above, the present invention allows a radio selective calling receiver with an intermittent reception function to display a message on a display such as an LCD during an operation period in which reception processing is performed in response to the arrival of a desired signal. Since the display is stopped, noise caused by the display operation will not be generated during the reception operation, which has the effect of preventing a decrease in reception sensitivity.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the operation of an embodiment of the display control method for a wireless selective calling receiver of the present invention, and FIG. 2 is a block diagram showing an example of a wireless selective calling receiver to which the present invention is applied. In the figure, 17...Decoder 22...Speaker 23...LED 24...Message readout switch 25...Display control circuit 27...CPU 28...LCD

Claims (1)

[Scope of Claims] An operation of performing reception processing in response to the arrival of a desired signal is performed intermittently, and a call notification is made when a call signal including the self-selected call number is received, and the information included in the call signal is A display for a wireless selective calling receiver that displays a message on a display device, characterized in that the message displaying operation of the display device is stopped during a period in which the receiving process is performed. control method.