JPH09149444A - Selective radio call receiver and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power consumption and suppress the drop of battery voltage by providing timers for respectively measuring a normal lighting time and a maximum consecutive lighting time and, when one of them reaches a fixed time set in advance, turning-off an illuminator so as to limit the consecutive lighting time of the illuminator within the fixed time. SOLUTION: In order to control ON/OFF of a power source signal to an illumination circuit 18, timers A19a and A19b connected to a control part 10 are provided. Then the normal lighting time is set to the timer A19a and the maximum consecutive lighting time is set to the timer B19b in advance to stop the power supply to the illumination circuit 18 when one of the timers A19a or A19b passes the set time. Thereby, the consecutive lighting time of the illuminator stays within the maximum consecutive lighting time to limit the consecutive lighting time so that power consumption is reduced and the voltage drop of the battery is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver provided with a display section composed of a liquid crystal display device or the like, and more particularly to a radio selective call reception capable of reducing power consumption and suppressing battery voltage drop. Machine and its control method.

[0002]

2. Description of the Related Art Generally, a radio selective calling receiver is provided with a display unit for displaying numerical information, messages and the like. As the display unit of the radio selective call receiver, a non-emission type display element such as a liquid crystal display element which does not emit light by itself and consumes less power is often used.

In a radio selective calling receiver having a display section composed of such a liquid crystal display element, an illuminating device (backlight) for illuminating the display section so that display information can be read even in a dark place. Is provided.

In the conventional radio selective calling receiver, there are a method of lighting the lighting device when a lighting switch is input, and a method of lighting by detecting ambient illuminance. In addition, the control for turning off the lighting device has been such that the lighting device is turned off after a certain period of time from the start of lighting.

Now, the configuration of a conventional radio selective calling receiver will be described with reference to FIG. FIG. 5 is a configuration block diagram of a conventional radio selective calling receiver. As shown in FIG. 5, a conventional radio selective call receiver has a control unit 10 for controlling the entire apparatus and a ROM for storing a processing program and the like.
(Read Only Memory) 11, RAM (Random Access Memory) 12 for storing received messages and the like, receiving unit 13 for receiving a wireless signal, demodulating the received signal and collating the calling number with its own ID. A decoder 14, an amplification unit 15 that amplifies a reception sound that notifies reception, a speaker 16 that outputs the reception sound, and a display unit 1 that displays a message or the like.
7, an illumination circuit 18 for illuminating the display section, and an illumination circuit 18
It is composed of a timer 19 used to control the turning off of the. Further, in order to control the ON / OFF of the power supply to the lighting circuit 18, the AND circuit 21 and the inversion (NO) circuit are provided.
T) circuit 22 is provided.

[0006] Next, of the above-mentioned constituent parts, a part involved in turning off the lighting circuit 18 will be specifically described. The control unit 10 outputs a power supply signal for supplying power to the lighting circuit 18 via the AND circuit 21, sets a lighting time in the timer 19, and gives a clock for starting the timer.

A time Tn is set as a lighting time (normal lighting time) in the timer 19, and when a timer start clock is input from the control unit 10, counting of the set time Tn is started. During counting, that is, until the time Tn elapses, the output signal from the timer 19 is "0". When the time T elapses and becomes equal to or greater than the timer value Tn, the timer 19 counts up and the output signal from the timer 19 becomes "1". The output signal from the timer 19 is inverted by the inverting circuit 22 and input to the AND circuit 21.

Here, the output from the AND circuit 21 will be briefly described. The power supply signal from the control unit 10 is "1" when the lighting switch (SW) is turned on,
When the signal from the inverting circuit 22 is “1”, that is, when the signal from the timer 19 is “0” (before the time Tn), the power supply signal is supplied to the lighting circuit 18 and the lighting circuit 1
8 lights up.

On the other hand, when the signal from the inverting circuit 22 is "0", that is, the signal from the timer 19 is "1" (time T).
In the case of (after n has passed), the power supply signal is not supplied to the illumination circuit 18 by the AND circuit 21, and the illumination circuit 18 is not turned on (or turned off). As a result, the lighting circuit 18 is turned on only until the timer 19 starts and the time Tn elapses.

Further, the conventional radio selective calling receiver is provided with a continuation switch (not shown) for inputting an instruction to continue lighting of the lighting circuit 18, and the continuation switch (S
When W) is pressed, the timer value is reset and the timer value is set to be counted from 0 again.

Next, the operation of the control section 10 of the conventional radio selective calling receiver when the lighting circuit 18 is continuously lit will be described with reference to FIG. FIG. 6 is a flowchart showing a process of continuing lighting of the lighting circuit 18 in the control unit 10 of the conventional radio paging receiver.

As shown in FIG. 6, in the conventional radio selective calling receiver, when an illumination lighting switch (not shown) is input (100), the control unit 10 outputs a timer start clock, Start timer 19 (10
2). As a result, the timer 19 starts counting and the output signal from the timer 19 becomes “0” until the count-up, and the power supply signal is supplied to the lighting circuit 18,
The lighting turns on.

Then, the control unit 10 judges whether or not the timer value is Tn or more (104), and if it is Tn or more, the operation of the AND circuit 22 described above has already stopped the power supply to the illumination circuit 18. Assuming that the lighting has been continued, the process of continuing lighting is ended.

When the timer value is less than Tn in the process 104, that is, when the illumination is on, the control unit 10
Judges whether the continuation switch (SW) has been input (106), and when the continuation switch has not been input, returns to step 104 and repeats the same processing.

When the continuation switch is input in the process 106, the control unit 10 resets the timer 19 and restarts the timer (108), and returns to the process 104. In this way, the processing of continuing lighting of the lighting device in the conventional radio selective calling receiver has been performed.

[0016]

However, in the above-described conventional radio selective call receiver and its control method, when the user inputs the continuation switch many times, the continuous lighting time of the lighting device is unlimitedly long. Then, there is a problem that the power consumption is increased and the battery voltage is lowered.

The present invention has been made in view of the above circumstances, and limits the continuous lighting time of the lighting device to within a fixed time,
An object of the present invention is to provide a radio selective call receiver and a control method thereof that can reduce power consumption and suppress a drop in battery voltage.

[0018]

The invention according to claim 1 for solving the above-mentioned problems of the prior art, in a radio selective calling receiver, starts when the illumination of the display section is turned on and is preset to be normal lighting. A first timer for counting time, a second timer for starting the lighting of the display unit and turning on the maximum continuous lighting time longer than the normal lighting time, and a first timer for turning on the lighting of the display unit. Before starting the counting of the first timer or the second timer by controlling the start of the timer and the second timer, and turning off the illumination when the counting of the first timer or the second timer ends. It is characterized by having a control unit for restarting the first timer when an operation for continuing the illumination is performed, and it is possible to reduce power consumption and suppress a decrease in battery voltage. .

According to a second aspect of the present invention for solving the above-mentioned problems of the conventional example, in the method for controlling a radio selective call receiver according to the first aspect, the control section is the first one when the illumination of the display section is turned on. The timer and the second timer are started, and when the operation of continuing the illumination is performed during the illumination of the display unit, the first timer is restarted, and the first timer finishes counting the normal lighting time. Or the second timer ends counting the maximum continuous lighting time, the illumination of the display unit is turned off.
It is possible to reduce power consumption and suppress a decrease in battery voltage.

According to a third aspect of the present invention for solving the above-mentioned problems of the conventional example, in a radio selective calling receiver, a timer for starting a lighting of the display unit to count a specific time and a timer for the display unit. When the lighting is turned on, the start of the timer is controlled, the maximum continuous lighting time is set as a variable M, the normal lighting time is held as a variable n, the count value of the timer is compared with the variable n, and the timer is set by the variable. n
When the counting is completed, the lighting is turned off, and when the lighting is continued before the timer finishes counting, the value obtained by subtracting the count time of the timer from the variable M is updated as a variable M, and the updated variable If the variable n is larger than M, the updated variable M is updated as the variable n, the timer is restarted, and the control unit compares the count value of the timer with the variable n. It is possible to reduce power consumption and suppress a decrease in battery voltage.

According to a fourth aspect of the present invention for solving the above-mentioned problems of the conventional example, in the method of controlling a radio selective call receiver according to the third aspect, the control unit starts a timer when the display unit is turned on. Then, when the operation of continuing the illumination is performed during the illumination of the display unit, a value obtained by subtracting the count value of the timer from the held variable M is updated as the variable M,
If the variable n is larger than the updated variable M, the updated variable M is updated as the variable n, the timer is restarted, the count value of the timer is compared with the updated variable n, and the timer is changed by the variable. It is characterized in that the illumination of the display unit is turned off after the count of n is finished, which makes it possible to reduce power consumption and suppress a decrease in battery voltage.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. In the first radio selective call receiver and the control method therefor according to the embodiment of the present invention, a timer (first timer) that measures a normal lighting time and a timer (second timer) that measures a maximum continuous lighting time. ) And
The lighting device is turned off when any one of the two timer values reaches a predetermined time set in advance, so that the continuous lighting time of the lighting device does not exceed the predetermined time, and the consumption is reduced. The power is reduced and the battery voltage is prevented from decreasing.

FIG. 1 is a block diagram showing the configuration of a first radio selective calling receiver (first device) according to the embodiment of the present invention. It should be noted that parts having the same configuration as in FIG. As shown in FIG. 1, the basic configuration of the radio selective call receiver (first device) according to the embodiment of the present invention is the same as that of the conventional radio selective call receiver shown in FIG. The configuration of the part that controls the power supply signal supply to the illumination circuit 18 is different from the conventional one.

FIG. 1 shows the configuration of the characteristic portion of the first device.
This will be described with reference to FIG. In the first device, in order to control ON / OFF of the power supply signal to the lighting circuit 18, the control unit 10
There are two timers connected to. Timer A (1
9a) checks the normal lighting time as in the conventional case, and the timer B (19b) checks the maximum continuous lighting time. That is, the timer A is set with the normal lighting time Tn as a set value, the timer B is set with the maximum continuous lighting time Tm, and the respective set values are counted. Here, there is a relation of normal lighting time Tn <maximum continuous lighting time Tm.

As in the conventional case, the timers A and B start counting by the timer start clock from the control unit 10 and output a signal "0" during counting. Also,
When the set time elapses and the timer value becomes Tn or Tm, the output signal becomes "1".

The outputs of the timer A and the timer B are input to a logical product (AND) circuit 21 via a logical sum (OR) circuit 23 and an inverting (NOT) circuit 22. If any one of the output signals of the timer A and the timer B is “1”, the output from the OR circuit 23 is “1”. Further, since this signal is inverted by the inverting circuit 22, O
When the output from the R circuit 23 is "1", the inverting circuit 2
The output from 2 becomes “0” and is input to the AND circuit 21.

The power supply signal from the control unit 10 is input to the other input terminal of the AND circuit 21 as in the conventional case, and the output signal from the AND circuit 21 is input to the illumination circuit 18. It has become.

As in the conventional case, since the power supply signal from the control unit 10 is "1" when the lighting switch is turned on, when the signal from the inverting circuit 22 is "1", that is, the timer A and The output signal from the inverting circuit 22 becomes "1" only when all the signals from the timer B are "0", and the two inputs to the AND circuit 21 become "1" together. In this case, that is, only when the timers A and B are both counting, the power supply signal is output from the AND circuit 21 to the lighting circuit 18, and the power is supplied to the lighting circuit 18.

On the contrary, when the signal from the inverting circuit 22 is "0", the output from the AND circuit 21 becomes "0" and the power supply to the illumination circuit 18 is stopped. That is, if either timer A or B outputs “1”, that is, if either timer has exceeded the set time, one of the inputs to the AND circuit 21 becomes “0”, and therefore the AND circuit 21 The output from is 0, the power signal is not supplied to the illumination circuit 18, and the illumination is turned off.

Therefore, the lighting time is the maximum continuous lighting time Tm.
When it exceeds, the signal from the timer B becomes "1", so that the power supply to the illumination circuit 18 is stopped and the illumination is turned off. As a result, the continuous lighting time can be kept within a fixed time.

Next, the control method in the first device will be described with reference to FIG. FIG. 2 is a flowchart showing a process of continuing lighting in the control unit 10 of the first device. As shown in FIG. 2, the illumination lighting switch (SW)
When (not shown) is input (200), the control unit 10 of the first device starts the timer A and the timer B (204). As a result, the timer A starts counting Tn and the timer B starts counting Tm.

Then, the control unit 10 judges whether the timer value of the timer A is Tn or more (206), and if it is Tn or more (Yes), it is determined that the light has already been turned off. To finish. Further, in the process 206, when the timer value of the timer A is less than Tn (No),
The control unit 10 determines whether the timer value of the timer B is Tm or more (208), and when it is Tm or more (Yes)
In the case of s), the processing is ended.

In process 208, the timer value of timer B is set to Tm.
When it is less than (No), it is determined whether or not the continuation switch is input (210). When it is not input (No), the process returns to the process 206 and the same process is performed. repeat. If the continuation switch is input in process 210 (Yes), the timer value of timer A is reset and timer A is restarted (21
2) Return to process 204. In this way, the lighting continuation process in the control unit 10 of the present device is performed.

According to the first radio selective call receiver and the control method thereof according to the embodiment of the present invention, the timer A (19a) and the timer A (19a) are two timers for controlling the supply of the power supply signal to the lighting circuit 18. Timer B (19b) is provided, timer A is set to normal lighting time (Tn), timer B is set to maximum continuous lighting time (Tm), and either timer A or timer B has exceeded the set time. In this case, since the power supply to the lighting circuit 18 is stopped, the continuous lighting time of the lighting device can be kept within the maximum continuous lighting time (Tm), and the continuous lighting time is limited, The power consumption can be reduced and the voltage drop of the battery can be suppressed.

Next, a second radio selective calling receiver according to the embodiment of the present invention will be described with reference to FIG. Figure 3
FIG. 3 is a configuration block diagram of a second radio selective calling receiver (second device) according to the embodiment of the present invention.

The second device has one timer for counting the lighting time, and the control unit reads the count value of the timer to determine the normal lighting time (Tn) and the maximum continuous lighting time (Tm).
The two variables (n and M) corresponding to and are compared with the timer value to control the power supply to the lighting circuit.

As shown in FIG. 3, the basic configuration of the second radio selective call receiver is the same as that of the conventional radio selective call receiver shown in FIG. ON / OFF of the power supply signal is controlled by the control unit 10, and an AND circuit and an inverting circuit are not provided. Further, the timer 19 is provided so as to be connected to the control unit 10, and the processing of the control unit 10 is different from the conventional one.

The control unit 10 of the second device has a lighting circuit 18
It controls ON / OFF of the power supply to the power source. The timer 19 is started when the lighting switch is input, the timer value (t) is read at any time, and t is the normal lighting time (Tn).
And variables n and M corresponding to the maximum continuous lighting time (Tm)
By comparing with, the continuous lighting time of the lighting device is controlled so as to be within a fixed time (here, Tm).

Here, the processing of the control unit 10 of the second device will be described with reference to FIG. FIG. 4 is a flowchart showing the processing of the control unit 10 of the second radio selective calling receiver. As shown in FIG. 4, in the second device, when the illumination lighting switch (SW) is input (300), the control unit 1
0 starts supplying power to the lighting circuit 18 (302),
The timer is started (304).

Then, the control section 10 substitutes the maximum continuous lighting time (Tm) into the variable M (M ← Tm) (306), and substitutes the normal lighting time (Tn) into the variable n (n ← Tn) ( Thirty
8). Then, the control unit 10 reads the timer value (t) from the timer 19 (310) and determines whether t> n (312).

When t> n (Yes),
Since the power supply to the lighting circuit 18 exceeds the normal lighting time, the control unit 10 stops the power supply to the lighting circuit 18 (324) and ends the process. As a result, the lighting device is turned off.

If t ≦ n (No) in the process 312, the controller 10 causes the continuation switch (S
W) is input (314), and if the continuation switch is not input (No),
The process returns to the process 310 and the same process is repeated.

When the continuation switch is input in the process 314, the control section 10 substitutes M-t for the variable M (M ← M-t) (316). With this, the remaining maximum continuous lighting time at that time is calculated.

Then, the control unit 10 compares the variable n with the variable M to determine whether n> M (31
8) If n> M (Yes), substitute M for n (n ← M). If n ≦ M (if No), n
The value of is left unchanged as the value set in step 308. This is a process for comparing the maximum continuous lighting time at that time with the normal lighting time and taking the shorter time.

Then, the timer value of the timer 19 is reset to 0, the timer is restarted (322), and the process 31
Move to 0. At this time, n is the normal lighting time,
The shorter one of the maximum continuous lighting times at that time is substituted. In this way, the processing of the control unit 10 of the second radio selective calling receiver according to the embodiment of the present invention is performed.

According to the second radio selective call receiver and the control method thereof, the timer 19 for counting the lighting time is provided, and the control unit 10 reads the timer value (t) and sets t to the normal lighting time (Tn). ) And the maximum continuous lighting time (Tm) corresponding to two variables n and M, the power to the lighting circuit 18 when the continuous lighting time of the lighting device exceeds a certain time (here, Tm). Since the supply is stopped, the continuous lighting time can be kept within a certain time, the power consumption can be reduced, and the voltage drop of the battery can be suppressed.

[0047]

According to the first and second aspects of the present invention, the normal lighting time is counted by the first timer, the maximum continuous lighting time is counted by the second timer, and the control unit controls the illumination of the display unit. Since the first timer is restarted when the operation for continuing the lighting is performed and the lighting is turned off when the counting of the first or second timer is finished, the radio selective calling receiver and the control method thereof are provided. Regarding the normal lighting time, even if the first timer restarts due to the operation to continue lighting, the second timer that is not restarted can turn off the lighting at the end of counting the maximum continuous lighting time, reduce power consumption, and reduce battery voltage. It is possible to suppress the decrease of

According to the third and fourth aspects of the invention, when the timer is started when the illumination of the display unit is turned on and the operation of continuing the illumination is performed during the illumination of the display unit, the variable held by the control unit is held. The value obtained by subtracting the count value of the timer from M is the variable M
If the variable n is larger than the updated variable M, the updated variable M is updated as the variable n, the timer is restarted, the count value of the timer is compared with the updated variable n, and the timer is updated by the variable n. Since the wireless selective calling receiver that turns off the lighting when it finishes counting and its control method, even if the timer restarts due to the operation to continue lighting with respect to the normal lighting time, from the maximum continuous lighting time to the lighting continuation operation The time obtained by subtracting the time is updated as the maximum continuous lighting time, and if the updated maximum continuous lighting time becomes shorter than the normal lighting time, the normal lighting time is updated with the maximum continuous lighting time, and the updated normal lighting time is counted. The lights can be turned off at the end of the process, which has the effect of reducing power consumption and suppressing the decrease in battery voltage.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a first radio selective calling receiver (this device) according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a process of continuing lighting in the control unit 10 of the present device.

FIG. 3 is a configuration block diagram of a second radio selective calling receiver according to the embodiment of the present invention.

FIG. 4 is a flowchart showing the processing of the control unit 10 of the second radio selective calling receiver.

FIG. 5 is a configuration block diagram of a conventional radio selective calling receiver.

FIG. 6 is a flowchart showing a process of continuing lighting of the illumination circuit 18 in the control unit 10 of the conventional radio paging receiver.

[Explanation of symbols]

10 ... Control part, 11 ... ROM, 12 ... RAM, 1
3 ... Receiving unit, 14 ... Decoder, 15 ... Amplifying unit, 1
6 ... speaker, 17 ... display part, 18 ... illumination circuit,
19 ... Timer, 20 ... OR circuit, 21 ... AND circuit, 22 ... Inversion circuit

Claims (4)

[Claims] 1. A first timer, which starts when lighting of a display unit is turned on and counts a preset normal lighting time,
A second timer that starts when the light of the display unit is turned on and counts a maximum continuous lighting time that is longer than the normal lighting time; and a start of the first timer and the second timer when the light of the display unit is turned on. To control the first
If the operation of turning off the lighting at the end of the count of the timer or the second timer and continuing the lighting before the end of the count of the first timer or the second timer is performed, the first timer is reset. A radio selective calling receiver having a control unit for starting. 2. The control unit starts the first timer and the second timer when the illumination of the display unit is turned on, and when the operation of continuing the illumination is performed during illumination of the display unit, the first timer is activated. A timer is restarted, and the lighting of the display unit is turned off when the first timer finishes counting the normal lighting time or the second timer finishes counting the maximum continuous lighting time. The method of controlling a radio selective call receiver according to claim 1, wherein the radio selective call receiver is controlled. 3. A timer that starts when the illumination of the display unit is turned on and counts a specific time, and controls the start of the timer when the illumination of the display unit is turned on. The maximum continuous lighting time is set as a variable M, and the normal lighting time is set. Hold as variable n,
The count value of the timer is compared with the variable n, and when the timer finishes counting the variable n, the illumination is turned off, and when the operation of continuing the illumination before the timer finishes counting, the variable M The value obtained by subtracting the count time of the timer from is updated as a variable M, and if the variable n is larger than the updated variable M, the updated variable M is updated as a variable n and the timer is restarted. A radio selective calling receiver having a control unit for comparing a count value with a variable n. 4. The control unit subtracts the count value of the timer from a variable M to be held when an operation for starting the timer when the illumination of the display unit is turned on and continuing the illumination during illumination of the display unit is performed. Value is updated as the variable M, and if the variable n is larger than the updated variable M, the updated variable M is updated as the variable n and the timer is restarted, and the count value of the timer and the updated variable n are 4. The method of controlling a radio selective calling receiver according to claim 3, wherein the comparison is performed, and when the timer finishes counting the variable n, the illumination of the display unit is turned off.