JPH11298929A - Key system, method for saving power of led, and record medium recording with control program for its method recorded therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a system for saving LED power in the key system where in crease in a load is prevented. SOLUTION: When a power failure supervisory circuit 13 supervises a feeding state of an AC power supply 15 to recognize a power failure state, the circuit 13 instructs power supply changeover to a power supply changeover circuit 14 and informs a key system control S/W 12 of a power failure state. The power supply changeover circuit 14 switches the power of the key system from the AC power supply 15 to a battery 16. The user sets inhibition or permission of LED power saving control to each of pushbutton telephone sets 2 to N in the system setting mode by the key system control S/W 12. Setting contents are stored in a power saving control setting memory 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a key system and a key system.
The present invention relates to an ED (light emitting diode) power saving method and a recording medium storing a control program for the method, and particularly to a power saving method in a key (telephone) system including an exchange.

[0002]

2. Description of the Related Art A key (telephone) system is composed of a host device for controlling the entire system and a plurality of key telephones. Software for realizing various service functions is built in the host device, and firmware for transmitting / receiving information to / from the host device and controlling the hardware of the key telephone is built in the key telephone.

In the conventional key system, the control of the LED of each key telephone is performed by turning on / off control information from a host device software. The light emission amount when the LED is turned on is fixed to a constant brightness by hardware and firmware. Although the key system is operated by a commercial AC power supply, when the AC power supply is cut off due to a power failure or the like, the key system receives power supply from a storage battery built in a higher-level device so that operation can be continued to some extent.

[0004]

However, depending on the system environment such as the number of key telephones connected to the key system and the number of station lines accommodated, the load increases and the operating time of the key system using the storage battery becomes extremely long. There is a problem that it may be shorter.

An object of the present invention is to provide a key system, an LED power saving method, and a recording medium on which a control program for the method is recorded, in which an increase in load is prevented.

[0006]

According to the present invention, a power supply circuit based on a commercial power supply, a backup storage battery at the time of a power failure, a power failure monitoring circuit for monitoring a power failure of the commercial power supply,
A key system including: a higher-level device including a circuit that switches to supply power from the backup storage battery when the commercial power source fails, and a plurality of key telephones provided under the higher-level device, A memory means for storing light emitting diode power saving control permission / prohibition settings at the time of a power failure of each of the plurality of key telephones; and a power saving control of the light emitting diode in accordance with the setting contents of the memory means in response to a command from the host device. And a power saving control means for performing the key saving.

[0007] The power-saving control means divides the light-emitting diodes into a plurality of groups, and when the light-emitting diodes are energized and emits light in a time-division manner, controls to shorten the energization time to thereby reduce the amount of light emission. The energization time is controlled by setting from the higher-level device.

According to the present invention, a power supply circuit based on a commercial power supply, a backup battery for a power failure, a power failure monitoring circuit for monitoring a power failure of the commercial power supply, and a backup battery for a power failure of the commercial power supply And a higher-level device including a circuit that switches to supply power from, and a plurality of key phones provided under the higher-level device, a key system light emitting diode power saving method,
When a power failure occurs, a step of reading out the power saving control permission setting data corresponding to each of the plurality of key telephones from the memory unit, and performing power saving control of the light emitting diode of each key telephone according to the read power saving control permission setting data. And a step of saving light-emitting diode power.

In the power saving control, the method further comprises a step of dividing the light emitting diodes into a plurality of groups, energizing and emitting light by time division, and controlling a time of energization.

According to the present invention, a power supply circuit based on a commercial power supply, a backup battery for a power failure, a power failure monitoring circuit for monitoring a power failure of the commercial power supply, and a backup battery for a power failure of the commercial power supply A control program for executing a light emitting diode power saving method of a key system including a host device including a circuit for switching power supply from the host device and a plurality of key phones provided under the host device is stored. Reading out the power saving control permission setting data corresponding to each of the plurality of key telephones from the memory unit when a power failure occurs, and reading the power saving control permission setting data according to each key telephone. Performing a power saving control of the light emitting diode of the present invention.

The operation of the present invention is as follows. The user sets, in advance, in the system setting mode, the prohibition or the permission of the execution of the LED power saving control during power supply of the storage battery for each key telephone. Upon detecting the power failure state, the host device transmits the LED power saving control information only to the key telephones that have previously permitted the LED power saving control in the system setting mode.
Also, when the system recovers from the power failure state and returns to the AC power supply state, the host device sends an L to each key telephone.
ED normal control information is transmitted.

The firmware of the key telephone is all LEDs
Are divided into a plurality of groups, and dynamic blinking control for performing control of each group at a predetermined interval is performed. At the time of LED power saving control, the lighting time per one LED group is reduced to about half of the time of normal lighting, so that the power consumption of the key telephone can be suppressed and the operating time by power supply to the storage battery can be extended.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of a key system according to the present invention. In FIG. 1, the key system according to the present invention comprises a host device 1 for controlling the system and a plurality of key telephones 2 to N. Also, the host device 1 includes an AC power supply 15 that receives a commercial AC power supply and generates a DC power supply necessary for the system, a backup storage battery 16 when a power failure occurs, a power failure monitoring circuit 13 that detects a power failure of the commercial power supply, It comprises a power supply switching circuit 14 for switching between an AC power supply 15 and a storage battery 16, a key system control software (S / W) 12 including a CPU (central processing unit; computer), and an LED power saving control setting memory 11. Further, the key telephones 2 to N are CP
A control firmware (F / W) 21 including U is provided.

The operation of the embodiment of the present invention will be described. When the power failure monitoring circuit 13 monitors the power supply state of the AC power supply 15 and recognizes the power failure state, it issues a power supply switching instruction to the power supply switching circuit 14 and notifies the key system control S / W 12 of the power failure state. The power supply switching circuit 14 supplies power to the key system A
The power is switched from the C power supply 15 to the storage battery 16.

In the system setting mode by the key system control S / W12, the user sets in advance the inhibition or permission of the LED power saving control for each of the key telephones 2 to N. The setting contents are stored in the power saving control setting memory 11. As shown in FIG. 2, the all-key telephone 2 is stored in the power saving control setting memory 11.
ＮN are collected, and the setting contents for each key telephone are stored in bit units as shown in FIG. Here, n is 2 ≦ n ≦ N.

Hereinafter, the key system control S / S shown in FIG.
The description will be made based on the flowchart of the LED power saving control process of W12. Key system control S / W12 is LED
The power saving control process is started periodically. In the normal state,
Branching whether LED power saving control is in progress (step 31) is N
Proceed to O and branch if the next power failure is occurring (step 43)
Is judged by the power failure monitoring circuit 13 to proceed to NO and end the processing.

When the state changes from the normal state to the power failure state,
Branching whether LED power saving control is in progress (step 31) is N
Proceed to O and branch if the next power failure is occurring (step 43)
Is determined by the power failure monitoring circuit 13 and proceeds to YES to set the state of the LED power saving control (step 44).

After setting the LED power saving control state,
Jump to clear the key telephone number (No.) counter for counting key telephones (step 33). This key telephone No. The setting contents for each key telephone are read from the LED power saving control setting memory 11 based on the value of the counter (step 34), and the power saving control is permitted or prohibited (step 35).
If the setting is to permit the power saving control, the LED power saving control information is transmitted (step 36), and if the setting is to prohibit the LED power saving control, the LED normal control information is transmitted (step 37) to all key telephones 2 to N, respectively. (Step 38).

Until the last key telephone number (N) is reached (NO in step 39), the key telephone number counter is counted up by one (step 40), and the process returns to step 34. If the last key telephone number (N) has been reached (YES in step 39), the process ends.

In the case of a power failure state, the branch (step 31) for determining whether LED power saving control is being performed is YES, and the process proceeds to NO in a branch (step 32) for determining whether recovery from the next power failure has been performed. Performs the same processing as at the start. Since the process is started periodically, even if the permission or prohibition setting of the LED power saving control is rewritten in the system setting mode at the time of the power failure, the switching of the LED power saving control is executed.

When returning from the power failure state to the normal state, L
The branch (step 31) indicating whether the ED power saving control is being performed is YE
In S, a branch is made to determine whether or not the power has been restored (step 3
Proceeding to YES in 2), transmitting LED normal control information to all key telephones 2 to N (step 41), and
The state during the ED power saving control is cleared (step 42), and the processing ends. The control F / W 21 of the key telephones 2 to N is shown in FIG.
As shown in (1), the LED control ports are divided into, for example, four groups to perform dynamic blinking control.

FIG. 6 is an LED control cycle interrupt timing chart of the key telephone F / W21. The timing counter is repeatedly counted from 0h to 7h by a timer interrupt of, for example, 1.7 msec (h) of the CPU 21, and each LED control process is started based on the timing counter value.

FIG. 7 is a flowchart of the LED control cycle interruption processing of the key telephone F / W21. First, the timing counter is incremented by one (step 5).
1) It is determined whether or not the count number of the timing counter has reached 8h (Step 52). If so, the timing counter is set to 0h (Step 53). move on.

If the timing counter is 0h (YES in step 54), all the LEDs are turned off (OFF), and then the LED # 1 group is turned on (ON) (step 55).
The interrupt has been completed. If the timing counter is 2h (YES in step 56), the LED # 2 group is turned on after all the LEDs are turned off (step 57), and the interrupt is terminated.

If the timing counter is 4h (YES in step 58), after turning off all the LEDs,
The # 3 group is turned on (step 59), and the interrupt is terminated. When the timing counter is 6h (YES in step 60), after turning off all the LEDs, the LED # 4 group is turned on (step 61), and the interrupt is terminated.

When the timing counter is 1h, 3h, 5h,
In the case of 7h, the process flows to a branch (step 62) as to whether LED power saving control is being performed. When the LED power saving control is being performed (YES in step 62), all LEDs are controlled at an earlier timing than during the LED normal control (step 62 is NO).
Turn off to reduce lighting time and save power.

As shown in FIG. 8, the dynamic lighting control at the time of the LED normal control is performed, for example, for # 13.6 msec.
The blinking of each LED from the first group to the # 4 group is performed for about 3.4 msec per group. As shown in FIG. 9, dynamic blinking control at the time of LED power saving control includes, for example, 13.
The power consumption is reduced by setting the lighting time of each LED from the # 1 group to the # 4 group to about 1.7 msec per group during 6 msec.

The points to note in this LED power saving control are:
In the case of hardware (H / W) that originally supplies a small amount of power to the LED, flickering may occur in the LED by reducing the lighting time with the F / W. As a countermeasure in this case, in the LED power saving control in FIGS. 6 and 7, for example, as shown in FIG. 10, a longest delay timer of 1.7 msec is provided.

The setting of the delay time is performed by the host device 1 transmitting the set value of the delay timer as control information to the key telephones 2 to N. As for the operation of the delay timer, when the internal timer count timing of the CPU 21 is, for example, 15.625 μsec and the maximum count number is, for example, 109, the maximum delay value is 15.625 × 109 = 1.7 msec.

In FIG. 10, first, a delay timer set value (0 to 109) is read (step 65), and this is read as a CPU 21 internal timer value for periodic interrupt processing (step 66), and the delay timer value and the CPU 21 internal timer value are read. Are counted (step 67 is YES), all LEDs are turned off (step 68), and the subroutine ends. As shown in FIG. 11, the time until the LED is turned off by the delay timer operation is about 1.7 ms.
Adjustment is possible between ec and about 3.4 msec.

As described above, the present invention makes it possible to reduce the time between LED lighting and extinguishment and reduce the amount of light emission, thereby suppressing power consumption of the storage battery 16 and extending the operation time of the key system. I have. When the power is restored from the power failure state, the normal LED control mode is set again, and the light emission amount of the LED is returned to the normal state. In addition, even if a power failure occurs, the setting of the key telephone for controlling the LED with the same light emission amount as the normal time can be performed in the system setting mode, so that the setting desired by each user can be performed.

[0033]

As described above, the present invention makes it possible to reduce the time between LED lighting and extinguishing and reduce the amount of light emission, thereby suppressing the power consumption of the storage battery and extending the operation time of the key system. There is. When the power is restored from the power failure state, the normal LED control mode is set again, and the light emission amount of the LED is returned to the normal state. In addition, even if a power failure occurs, the setting of the key telephone for controlling the LED with the same light emission amount as the normal time is enabled in the system setting mode, so that there is an effect that the setting desired by each user can be performed.

[Brief description of the drawings]

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

FIG. 2 is a configuration diagram of an LED power saving control setting memory of a host device.

FIG. 3 is a bit configuration diagram of an LED power saving control setting memory of a host device.

FIG. 4 is a flowchart of an LED power saving control process of a CPU of a host device.

FIG. 5 is an explanatory diagram of an LED control port of the key telephone.

FIG. 6 is an LED control cycle interrupt timing chart of a key telephone CPU.

FIG. 7 is a flowchart of an LED control cycle interrupt process of a key telephone CPU.

FIG. 8 is an explanatory diagram of dynamic blinking during LED normal control of the CPU of the key telephone.

FIG. 9 is an explanatory diagram of dynamic blinking during LED power saving control of the CPU of the key telephone.

FIG. 10 is a flowchart of an LED power saving control process of a key telephone CPU.

FIG. 11 is an explanatory diagram of dynamic blinking during LED power saving control by the delay timer operation of the CPU of the key telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-order apparatus 2-N key telephone 11 Memory 12, 21 CPU 13 Power failure monitoring circuit 14 Power supply switching circuit 15 AC power supply 16 Storage battery

Claims (6)

[Claims] 1. A power supply circuit based on a commercial power supply, a backup storage battery at the time of a power failure, a power failure monitoring circuit monitoring a power failure of the commercial power supply, and a power supply from the backup storage battery at the time of a power failure of the commercial power supply And a plurality of key telephones provided under the higher-level device, comprising: a light-emitting diode power-saving device at the time of a power failure of each of the plurality of key telephones. A key system comprising: memory means for storing a control permission / prohibition setting; and power saving control means for performing power saving control of the light emitting diode according to the setting contents of the memory means in response to a command from the host device. . 2. The power-saving control means divides the light-emitting diodes into a plurality of groups and, when energizing and emitting the light-emitting diodes in a time-division manner, controls the power-on time to be shorter so as to reduce the amount of light emission. The key system according to claim 1, wherein 3. The key system according to claim 2, wherein said energization time is controlled by setting from said higher-level device. 4. A power supply circuit based on a commercial power supply, a backup storage battery at the time of a power failure, a power failure monitoring circuit monitoring a power failure of the commercial power supply, and a power supply from the backup storage battery at the time of a power failure of the commercial power supply. A light-emitting diode power saving method for a key system including a host device including a circuit that switches the key phones so that the plurality of key phones are provided under the host device. Reading the corresponding power saving control permission setting data from the memory unit, and performing power saving control of the light emitting diode of each key telephone according to the read power saving control permission setting data. Light emitting diode power saving method. 5. The light-emitting diode according to claim 4, further comprising a step of dividing the light-emitting diodes into a plurality of groups, energizing and emitting light by time division, and controlling a time of energization during the power saving control. Power saving method. 6. A power supply circuit based on a commercial power supply, a backup storage battery at the time of a power failure, a power failure monitoring circuit monitoring a power failure of the commercial power supply, and supplying power from the backup storage battery at the time of a power failure of the commercial power supply. And a recording medium storing a control program for executing a light-emitting diode power saving method of a key system including a higher-level device including a circuit that switches to perform the method and a plurality of key telephones provided under the higher-level device. Reading out the power saving control permission setting data corresponding to each of the plurality of key telephones from the memory unit when a power failure occurs; and reading out the power saving control permission setting data corresponding to each of the plurality of key telephones. Performing a power saving control.