TWI455447B - A power supply device and a video display device - Google Patents

Description

Power supply device and image display device

The present invention relates to a power supply device for supplying a power supply voltage to a load circuit, and an image display device having such a power supply device.

The power supply device includes power consumption in the load circuit according to the state of the load circuit, and operates to reduce power consumption, and even "no input power (power failure state)", "input voltage recovery", "starting", etc. In an abnormal (unsteady) state, it is also necessary to operate to keep the electronic machine in a stable state while maintaining low power consumption.

According to Patent Document 1, an electronic device, for example, a low-power consumption device for a video recorder, monitors a power supply voltage having a standby function (an output voltage of a power supply device including a spare component), and suppresses power consumption by the cut microcomputer. When the microcomputer is in the normal operation mode, it operates while switching the low-cycle operation mode.

However, although the microcomputer detects a power supply voltage having a standby function, and does not detect the presence or absence of an AC input in advance, it is impossible to determine an abnormal state such as a power failure, and stable processing cannot be performed in the abnormal state. Further, in the state where there is no AC input, when the standby voltage level is in a sufficient state, upon receiving the power-on command, although the electronic device cannot perform the normal operation, the microcomputer is still required to start the conversion to the normal operation, and the standby power is wasted.

Patent Document 2 discloses that a low power consumption circuit for an electric and electronic device is latched when a power supply voltage having a standby function (output voltage of a power supply circuit including a supercapacitor, a secondary battery, or a solar battery) is sufficient. The relay is constructed by cutting off the fundamental AC input. As a result, the electric power required to maintain the cut-off state of the relay is reduced to achieve low power consumption. However, although the control circuit and the microcomputer detect the power supply voltage having the standby function, since the AC input is not detected, the abnormal state such as the power failure cannot be determined, and stable processing cannot be performed in the abnormal state. Further, in the state where there is no AC input, when the standby voltage level is in a sufficient state, upon receiving the power-on command, although the electronic device cannot perform the normal operation, the microcomputer starts to turn on the latch relay. As a result, spare power is wasted.

The backup power supply circuit described in Patent Document 3 is connected to the power switch, controls the latch relay (self-holding type relay), has a structure for connecting the charging power source to the load circuit, and determines whether the power switch is turned off or the AC input is lowered. When the switch is in the on state and the AC input is decreasing, the load circuit is set to the low power consumption mode, and even if the charging power supply voltage drops, as long as the load circuit is reset, the load circuit is not cut off and continues to be maintained. The connection state is characterized by this. However, it is intended to "suppress power consumption while maintaining the current without stopping the load circuit", and the function of suppressing power consumption is insufficient.

The electronic device having the switching power supply described in Patent Document 4 is configured such that the switching power supply of the primary side of the transformer can be stopped from the secondary side by the optical MOS relay, and the main CPU, the power management CPU, the latch circuit, and the secondary side are disposed on the secondary side. Selector circuit, power storage circuit. In the low power consumption standby mode, the power supply to the main CPU and the power management CPU is stopped, and the power supplied from the storage circuit is stopped. The force is only driven by the latch circuit and the selector circuit and the photo MOS relay to reduce power consumption. However, since the storage voltage detecting means does not include the power button state detecting means, the configuration of the management CPU cannot determine whether the recovery from the low power consumption standby mode is based on the decrease in the storage voltage or the pressing of the power button. Therefore, when the storage voltage is lowered and the switching power supply is restarted, the low power consumption standby mode is not caused again, and the configuration is restored in the normal operation mode. Further, in order to continuously drive the optical MOS relay, it is not necessary to be a mechanical relay, but it must be controlled by a current of a milliampere level, and the storage circuit becomes a heavy load.

[advance technical documents]

[Patent Document 1] Japanese Patent No. 3449112 (page 4, paragraph 1, 2)

[Patent Document 2] Japanese Patent No. 3472283 (pages 5, 10, 1, 15, 16, 17)

[Patent Document 3] Japanese Patent No. 3688474 (Page 3, Figure 1)

[Patent Document 4] Japanese Patent No. 3997328 (Page 6, Figure 2)

The power device and the power supply circuit, which are characterized by such low power consumption, are not considered to be stable and operate with low power consumption even in an abnormal state, or in order to be able to respond to an abnormal state, the primary side and the secondary side of the transformer Signals must be exchanged between each other, and as a result, the purpose of low power consumption cannot be sufficiently achieved.

Therefore, even if the abnormal state of the power failure is abnormal, it can be made The low power consumption stable operation is a problem to be solved in the present invention.

A power supply device according to an aspect of the present invention includes: a first control unit that controls an operation of the load circuit; and a first switch unit that supplies power from the main power source to the first control unit and the load circuit; and the second switch The power supply is supplied from the main power source, and the charging type power supply supplies electric power from the second switch unit without passing through the first switch unit, and the second control unit supplies the electric power from the charging type. The power supply receives power supply, controls the first switch unit and the second switch unit, and the charging type power supply voltage detecting circuit detects an output voltage of the charging type power supply, and supplies a charging type power supply voltage detection signal indicating a detection result to the second control. a fixed circuit that is connected to the main power source without any of the first switch unit and the second switch unit, and outputs the first switch unit and the second unit when an output voltage of the main power source rises a fixed time signal in which the switch unit is in a constant state; and a main power supply voltage detecting circuit that detects a voltage of the main power supply and supplies a display detection junction a main power supply voltage detection signal to the second control unit; wherein the first control unit supplies on/off information to the load circuit to the second control unit; and the second control unit detects the main power supply voltage Signal, the above-mentioned on/off information, the above-mentioned charging type power supply voltage detection signal, and whether the execution control outputs a first control signal for causing the first switch portion to be in an on state and a second control signal for turning the second switch portion into an on state; the first control signal and the first switch portion being fixed The fixed time signal in the time-on state is input to the first switch unit, and when at least one of the first control signal and the fixed time signal indicates an ON state, the first switch unit is in an ON state; and the second control signal is used The fixed time signal for causing the second switch unit to be in a constant state to be turned on is input to the second switch unit, and when at least one of the second control signal and the fixed time signal indicates an ON state, the second switch unit is turned on. .

A power supply device according to another aspect of the present invention includes: a first control unit that controls operation of a load circuit; and a first switch unit that supplies power from a main power source to the first control unit and the load circuit; and a second switch unit The electric power is supplied from the main power source, and the charging type power source supplies electric power from the second switch unit without passing through the first switch unit, and the second control unit receives the electric power from the charging type power supply. Power supply, controlling the first switch unit and the second switch unit; and the first fixed circuit is connected to the main power source without any one of the first switch unit and the second switch unit, and an output voltage of the main power source When rising, a signal for turning on the first switch portion for a predetermined period of time is output, and the second fixed circuit is connected to the main power source without passing through any of the first switch portion and the second switch portion. When the output voltage of the power supply rises, And outputting a signal for causing the second switch unit to be in a constant state for a predetermined period of time; the first reset circuit is connected to the main power source by the first switch unit, and when a voltage of the main power source rises, a reset pulse is generated and supplied The first control unit initializes the first control unit, and the second reset circuit is connected to the main power source without any of the first switch unit and the second switch unit, and outputs the main power supply. When the voltage rises, a reset pulse is generated and supplied to the second control unit. The second control unit initializes the reset pulse output from the second reset circuit, and starts the operation. After the initialization is completed, the output is used to output the signal. a first control signal for turning on the first switch portion and a second control signal for turning the second switch portion into an on state; the first control signal and the first switch portion being turned on for a predetermined period of time a signal output from the first fixed circuit in a state is input to the first switch unit, and at least the first control signal or a signal indicating the output of the first fixed circuit is instructed. In the state, the first switch unit is turned on, and the second control signal and a signal output from the second fixed circuit for causing the second switch unit to be in a constant state are input to the second switch unit. When at least the second control signal or the signal output from the second fixed circuit indicates an on state, the second switch unit is turned on.

According to the present invention, in an abnormal (unsteady) state such as "no input power (power failure state)", "input voltage recovery", or "starting", the power consumption can be reduced while the operation can be stabilized.

1‧‧‧AC voltage input (AC power input)

2‧‧‧Main power supply

3‧‧‧1st fixed circuit

3a‧‧‧ Input terminal of the first fixed circuit 3

301‧‧‧ capacitor

302‧‧‧resistance

11a‧‧‧ Input terminal of the second reset circuit 11

14s‧‧‧1st voltage detection terminal of the second control unit 14

4‧‧‧2nd fixed circuit

4a‧‧‧ Input terminal of the second fixed circuit 4

401‧‧‧ capacitor

402‧‧‧resistance

5‧‧‧1st switch

5a‧‧‧Input terminal of the first switch unit 5

5b‧‧‧ Output terminal of the first switch unit 5

5d, 5e‧‧‧ control signal input terminal of the first switch unit 5

501‧‧‧P channel MOSFET

502‧‧‧resistance

503‧‧‧ capacitor

504 and 505‧‧‧resistance

506‧‧‧NPN transistor

507‧‧ ‧ diode

6‧‧‧Fixed circuit

6a‧‧‧Input terminal of fixed circuit 6

7‧‧‧Charging type power supply voltage detection circuit

7a‧‧‧ Voltage detection terminal of charging type power supply voltage detecting circuit 7

8‧‧‧2nd switch

8a‧‧‧Input terminal of the second switch unit 8

8b‧‧‧ Output terminal of the second switch unit 8

8d, 8e‧‧‧ control signal input terminal of the second switch unit 8

801‧‧‧P channel MOSFET

802‧‧‧resistance

803‧‧‧ capacitor

804 and 805‧‧‧resistance

806‧‧‧NPN transistor

807‧‧‧dipole

9‧‧‧1st reset circuit

9a‧‧‧ Input terminal of the first reset circuit 9

9b‧‧‧ Output terminal of the first reset circuit 9

10‧‧‧Charging power supply

10a‧‧‧Input terminal for rechargeable power supply 10

10b‧‧‧ Output terminal of rechargeable power supply 10

11‧‧‧2nd reset circuit

11a‧‧‧ Input terminal of the second reset circuit 11

11b‧‧‧ Output terminal of the second reset circuit 11

12‧‧‧Load circuit

12m‧‧‧ register

12p‧‧‧Power input terminal of load circuit 12

13‧‧‧1st Control Department

13m‧‧‧ non-volatile memory

13p‧‧‧Power input terminal of the first control unit 13

13r‧‧‧Reset signal input terminal of the first control unit 13

14‧‧‧2nd Control Department

14i‧‧‧Insert information input terminal

14p‧‧‧Power input terminal of the second control unit 14

14q‧‧‧Charging type power supply voltage detection input terminal

14q‧‧‧2nd voltage detection terminal

14r‧‧‧Reset signal input terminal of the second control unit 14

14s‧‧‧1st voltage detection terminal (supply voltage detection input terminal)

15‧‧‧Insert Signal Generation Department

15p‧‧‧Power input terminal

16‧‧‧resistance

17‧‧‧Lighting diode (indicator)

18‧‧‧Optoelectronics

19‧‧‧Main power supply voltage detection circuit

19a‧‧‧ Voltage detection terminal of main power supply voltage detecting circuit 19

D2‧‧‧ voltage

D3‧‧‧Output signal of fixed circuit 3 (fixed time signal)

D6‧‧‧ Output signal of fixed circuit 6 (fixed time signal)

D7‧‧‧Charging type power supply voltage detection signal

D9‧‧‧Reset pulse

D11‧‧‧Reset pulse

D13c‧‧‧Control data

D14a‧‧‧1st control signal of the second control unit 14

D14b‧‧‧2nd control signal of the second control unit 14

D14c‧‧‧ control signal of the second control unit 14

D14d‧‧‧ control signal of the second control unit 14

D15‧‧‧ insertion signal

D19‧‧‧ Output of main power supply voltage detection circuit 19 (main power supply voltage detection signal)

G‧‧‧ gate

LDS‧‧‧Information (Action Status Information)

PDS‧‧‧通/断信息

V0‧‧‧ output voltage

V1‧‧‧ voltage

V2‧‧‧ output voltage

V2t‧‧‧ threshold

VD‧‧‧ image signal

[Fig. 1] is a block diagram showing a power supply device according to a first embodiment of the present invention; [Fig. 2] (a) to (h) of the device of Fig. 1 in which power is supplied from the main power source 2 A timing chart showing the operation of the first and second switching units based on the output of the fixed circuit; [Fig. 3] is a flowchart showing the processing sequence in the second control unit 14 according to the first embodiment of the present invention; 4 is a block diagram showing a power supply device according to a second embodiment of the present invention; [Fig. 5] is a flowchart showing a processing sequence in the second control unit 14 according to the first embodiment of the present invention; 6 is a block diagram showing a power supply device according to a third embodiment of the present invention; and FIG. 7 is a view showing a configuration example of the first fixed circuit 3 and the first switch unit 5 according to the third embodiment of the present invention. [Fig. 8] is a connection diagram showing a configuration example of the second fixed circuit 4 and the second switch unit 8 according to the third embodiment of the present invention; [Fig. 9] (a) to (g) In the device of Fig. 6, when the power is supplied from the main power source 2, the first and second switch units are operated in accordance with the outputs of the first and second fixed circuits. [Fig. 10] (a) to (m) are the timing charts of the operation of each unit when the power is supplied from the main power source 2 in the apparatus of Fig. 6; [Fig. 11] (a) and (b) Regarding the third embodiment, according to the charging type power supply 10 The output voltage shows an example timing diagram of the control of the second switch unit 8; [Fig. 12] (a) and (b) relate to the third embodiment, and displays the second according to the output voltage of the charging type power supply 10. A timing chart of another example of the control of the switch unit 8; [Fig. 13] is a flowchart showing the priority order of processing in the second control unit 14 according to the third embodiment of the present invention; [Fig. 14] shows In the processing of the second control unit 14 according to the third embodiment of the present invention, a flowchart of the prohibition range of the insertion processing; [Fig. 15] is a second control unit 14 according to the third embodiment of the present invention, according to the main power supply 2 The output voltage shows a flow chart for controlling the first and second switch units 5 and 8; [Fig. 16] (a) to (d) are the second control unit 14 according to the third embodiment of the present invention, according to the main The output voltage of the power source 2 shows a timing chart for controlling the first and second switch units 5 and 8; [Fig. 17] is a block diagram showing the power supply device according to the fourth embodiment of the present invention; FIG. 7 is a flowchart showing the processing of the second control unit 14 according to the fourth embodiment of the present invention; [FIG. 19] (a) to (d) are the fourth embodiment according to the present invention. The second control unit 14 displays a timing chart of the drive control of the indicator 17; [20th] is a flowchart showing the operation of the power supply device according to the fifth embodiment of the present invention; and [21] is based on A block diagram of a video display device according to a sixth embodiment of the present invention.

[First Embodiment]

Fig. 1 is a view showing an electronic apparatus including a power supply device and a load circuit of a first embodiment of the present invention. In the first drawing, the power supply device of the present embodiment is constituted by a portion other than the load circuit 12. That is, the power supply device includes the fixed circuit 6, the first and second switch units 5, 8, the charge type power supply 10, the first and second control units 13, 14, the charge type power supply voltage detecting circuit 7, and the main power supply voltage detection. Circuit 19.

For the main power source 2, an AC voltage input (AC power input) 1 is supplied from a commercial power source. The main power supply 2 internally includes a transformer and a rectifier, and outputs a DC voltage V0.

The load circuit 12 supplies electric power from the main power source 2 through the first switch unit 5. Similarly to the load circuit 12, the first control unit 13 receives power supply from the main power source 2 through the first switch unit 5, and controls the operation of the load circuit 12.

The fixed circuit 6 is connected to the main power source 2 without passing through any of the first switch unit 5 and the second switch unit 8.

In the charging type power supply 10, the main power source 2 does not pass through the first switch unit 5, but is supplied with electric power by the second switch unit 8, and is charged. The charging type power source 10 is configured by, for example, a super capacitor, a secondary battery, or the like.

The second control unit 14 receives power supply from the charging power source 10 and controls the passage of the first switch unit 5 and the second switch unit 8. Broken.

The output voltage V0 of the main power supply 2 is applied to the input terminal 5a of the first switch unit 5, the input terminal 6a of the fixed circuit 6, the input terminal 8a of the second switch unit 8, and the voltage detection terminal 19a of the main power supply voltage detecting circuit 19.

Main power supply voltage detecting circuit 19 detects the output power of the main power supply 2 The voltage V0 is outputted to output a main power supply voltage detection signal D19 indicating whether or not the output voltage V0 is equal to or greater than a predetermined threshold. The detection signal D19 is input to the second control unit 14.

The output terminal 5b of the first switch unit 5 is connected to the power input terminal 12p of the load circuit 12 and the power input terminal 13p of the first control unit 13, so that the output voltage V1 of the first switch unit 5 is applied to the load circuit 12 and The first control unit 13.

The control signal input terminals 5d and 5e of the first switch unit 5 are supplied with an output signal (fixed time signal) D6 of the fixed circuit 6 and a first control signal D14a of the second control unit 14 (for controlling the first switch unit). 5 signal).

The first switch unit 5 is turned on (closed or on state) based on the output signal D6 of the fixed circuit 6 or the first control signal D14a output from the second control unit 14.

When the first switch unit 5 is turned on, the first control unit D14a is in the first state, for example, in the H state, and is in the second state, for example, in the L state (low-level state). When the first control signal D14a is in the H state, it is often expressed as "the control signal is output in order to turn the first switch unit 5 into an ON state".

The output terminal 8b of the second switch unit 8 is connected to the input terminal 10a of the charging type power supply 10.

The output terminal 10b of the charging type power supply 10 is connected to the voltage detecting terminal 7a of the charging type power source voltage detecting circuit 7. The charging type power source voltage detecting circuit 7 detects the output voltage V2 and outputs a charging type power source voltage detecting signal D7 indicating whether or not the output voltage V2 is equal to or greater than a predetermined threshold value. The detection signal D7 is input to the second control unit 14.

The output terminal 10b of the charging type power supply 10 is also connected to the second control unit 14 The power input terminal 14p and the output voltage V2 of the charging power source 10 are applied to the second control unit 14.

The control signal input terminals 8d and 8e of the second switch unit 8 are connected to the output signal D6 of the fixed circuit 6 and the second control signal D14b of the second control unit 14 (for controlling the signal of the second switch unit 7).

The second switch unit 8 is turned on in accordance with the output signal D6 of the fixed circuit 6 or the second control signal D14b output from the second control unit 14.

When the second switch unit 8 is in the ON state, the second control unit D14b is in the first state, for example, in the H state, and is in the second state, for example, in the L state. When the control signal D14b is in the H state, it is often expressed as "the control signal is output in order to turn the second switch unit 8 into an ON state".

When the first and second switch units 5 and 8 are turned on, the output signal D6 of the fixed circuit 6 is, for example, in the H state, and is in the second state, for example, in the L state. When the output signal D6 is in the H state, it is often expressed as "outputting an output signal in order to turn the first and second switching sections 5, 8 into an on state".

The fixed circuit 6 outputs a signal for turning on the first and second switching units 5 and 8 when the output voltage V0 of the main power supply 2 rises. In other words, the fixed circuit 6 outputs a signal of a predetermined time and a predetermined state, for example, an H state, from the rise of the voltage of the input terminal 6a.

When the charging type power supply 10 starts supplying power, the second control unit 14 starts operating, and outputs a first control signal D14a for turning on the first switching unit 5 and a second switching unit 8 for being turned on. The second control signal D14b.

The second control unit 14 is also based on the detection from the main power supply voltage detecting circuit 19. The measurement signal D19 performs control of the first and second switch units 5 and 8, and performs control of the first switch unit 5 and the first switch unit 5 generated by the on/off information PDS, which will be described later, based on the on/off information PDS to be described later. Control is performed, and control of the second switch unit 8 is performed based on the detection signal D7 from the charging type power source voltage detecting circuit 7.

When the voltage V1 is supplied from the first switch unit 5, the first control unit 13 starts the operation, and transmits the on/off information PDS to the second control unit 14, and starts control of the load circuit 12.

The first control unit 13 and the load circuit 12 are connected so that data can be transmitted in both directions. For example, the control data D13c is transmitted from the first control unit 13 to the load circuit 12, and the data indicating the state thereof is transmitted from the load circuit 12 to the first control unit 13.

For example, whether the external connection terminals of the load circuit 12 are connected to the display information of the signal line for transmitting the signal, and the display information of the state of the transfer switch manually operated by the load circuit 12 is transmitted from the load circuit 12 to the first control unit 13 .

When the second control unit 14 transmits the control data D13c to the first control unit 13 from the second control unit 14 to the first control unit 13 for restoring the state before the power supply to the load circuit 12 is stopped, the first control unit 13 13 is stored therein, and the load circuit 12 is controlled based on the data indicating the state before the power supply stop of the load circuit 12.

When the control data D13c is transmitted from the first control unit 13 to the load circuit 12, the setting data of the control data D13c is held in the register 12m in the load circuit 12. For example, according to the control data D13c for controlling the brightness and volume of the image, the brightness in the register 12m in the load circuit 12 is maintained. Set value and volume setting value. The held setting data is used to control the operation of the load circuit 12.

The setting data held in the register 12m is transmitted from the load circuit 12 to the first control as information (operation part information) LDS (part of) indicating the operating state of the load circuit 12 when the load circuit 12 is powered off. The portion 13 is stored in the non-volatile memory 13m (for example, constituted by an EEPROM) in the first control unit 13.

In the non-volatile memory 13m, the memory on/off information PDS is further recorded as part of the action status information LDS. The on/off information PDS is transmitted from the first control unit 13 to the second control unit 14, and is also held in the second control unit 14. In other words, when the operation of the first control unit 13 is stopped when the power supply to the load circuit 12 is stopped before the start of the operation (when the power supply is stopped until the start of the operation), the load circuit 12 transmits the on/off information indicating whether or not the power is on. To the second control unit.

Therefore, when the power supply circuit 12 stops supplying power, the on/off information PDS indicates whether or not the load circuit 12 is in the power-on state. Therefore, when the power is restored, it can also be said to indicate whether the load circuit should be in an on state.

When the load circuit 12 is stopped, the power supply is de-energized, the AC power supply is disconnected, the main power supply 2 is disconnected from the AC voltage input 1, or the first switch unit 5 is turned off.

The on/off information PDS is generated as follows. In other words, when the load circuit 12 is normally powered off, the information indicating that the power is off is transmitted from the load circuit 12 to the first control unit 13 and stored in the first control unit 13. On the other hand, when the power supply is stopped, the above-mentioned "display of normal power-off information" is not transmitted, and the first control unit 13 does not store the information in the first control unit 13, when the power supply is stopped. It is judged that the load circuit 12 is in an energized state. Based on such determination, the first control unit 13 generates information indicating that the load circuit 12 is energized when the load circuit 12 is stopped, or information indicating that the load circuit 12 is powered off when the load circuit 12 stops supplying power, and is stored in Internal non-volatile memory within 13m.

The fixed circuit 6 can be configured by the same configuration as the first fixed circuit 3 or the second fixed circuit 4 of the third embodiment to be described later. For example, the first switch unit 5 and the second switch unit 8 can have the same configuration as the first switch unit 5 and the second switch unit 8 of the third embodiment to be described later.

When the rise of the output voltage V0 of the main power supply 2 has elapsed for a predetermined period of time, and the output D6 of the fixed circuit 6 is in the L state, the control signal D14a of the second control unit 14 is also in the H state, whereby the first switch portion 5 is kept on. As a result, the output voltage V0 of the main power source 2 is continuously supplied to the first control unit 13 and the load circuit 12 via the first switch unit 5.

The second (a) to (h) diagrams show the outputs of the fixed circuit 6, the outputs of the voltage detecting circuits 7, 19, and the operations of the switches 5, 8 when the main power supply 2 of Fig. 1 starts power supply.

When the charging type power supply 10 supplies the AC voltage input 1 in the uncharged initial state, the main power source 2 outputs the output voltage V0 (Fig. 2(a)).

The output voltage V0 of the output is applied to the input terminal 5a of the first switch unit 5, the input terminal 6a of the fixed circuit 6, the input terminal 8a of the second switch unit 8, and the detection terminal 19a of the main power supply voltage detecting circuit 19.

When the output voltage V0 is present (when the voltage V0 is equal to or greater than a predetermined threshold value), the main power supply voltage detecting circuit 19 outputs a main power supply voltage detection signal indicating the presence of the display voltage V0 to the power supply voltage detecting input terminal 14s of the second control unit 14. D19 (Fig. 2(c)).

The fixed circuit 6 outputs a signal D6 for a certain period of time when the output voltage V0 of the main power source 2 is input (Fig. 2(b)).

The output signal D6 of the fixed circuit 6 is input to the control terminal 5d of the first switch unit 5 and the control terminal 8d of the second switch unit 8.

When one or both of the output signal D6 from the fixed circuit 6 and the first switch control signal D14a from the second control unit 14 are in the H state, the first switch unit 5 outputs the first switch unit. When the signal is turned on, the 5 is turned on.

Similarly, when one or both of the output signal D6 from the fixed circuit 6 and the second switch control signal D14b from the second control unit 14 are in the H state, the second switch unit 8 outputs When the switch unit 8 is turned on, the switch unit 8 is turned on.

According to the above operation, when the output voltage V0 of the main power source 2 is input to the fixed circuit 6, the first switch portion is output for a predetermined period of time (a certain period of time after the voltage V0 is applied to the fixed circuit 6), and the output signal D6 is outputted, and the signal D6 is outputted. 5 and the second switch unit 8 are in an on state (second (d), (e)).

When the first switch unit 5 is in the ON state, the output voltage V0 of the main power source 2 is supplied to the load circuit 12 and the first control unit 13 as the voltage V1 via the first switch unit 5 (Fig. 2(f)).

The first control unit 13 transmits the operation state information LDS of the load circuit 12 to the second control unit 14.

As described above, when the second switch unit 8 is turned on, the output voltage V0 of the main power source 2 is supplied to the charging power source 10, and the output of the charge type power source 10 is output. The voltage V2 is supplied to the second control unit 14 (Fig. 2(g)), and the second control unit 14 starts control.

The output voltage V2 of the charging type power supply 10 is also input to the charging type power supply voltage detecting circuit 7, and the charging type power supply voltage detecting circuit 7 detects the output voltage V2 of the charging type power supply 10, and the detection result is output as the charging type power supply voltage detecting signal D7 to The charging type power supply voltage detection input terminal 14q of the second control unit 14 (Fig. 2(h)).

The third diagram shows the operational sequence of the second control unit 14 that is executed to supply the voltage V2.

When the voltage V2 is input from the charging type power supply (when the voltage V2 starts to be input), the second control unit 14 starts outputting the control signals D14a and D14b from the period in which the fixed circuit 6 outputs the fixed time signal D6 for a predetermined period of time (ST1).

As described above, the first switch unit 5 is turned on when at least one of the fixed time signal D6 and the control signal D14a is input, and the fixed time signal D6 is in the L state, and the control signal D14a is maintained in the H state. On state. Similarly, when at least one of the fixed time signal D6 and the control signal D14b is input, the second switch unit 8 is turned on, and after the fixed time signal D6 is in the L state, the control signal D14b is maintained in the ON state as long as the control signal D14b is in the H state. .

Since the power supply device is configured as described above, even if the initial state in which the charging type power supply 10 has not been charged is started, the effect of stably starting the power supply device can be obtained. Moreover, since the output of the fixed circuit 6 has only a certain period of time, the power consumption of the fixed circuit is also suppressed.

According to the control signal D14a, the first switch unit 5 continues to be in an on state At this time, the power supply voltage V1 is supplied to the first control unit 13 and the load circuit 12. The first control unit 13 starts the control of the load circuit 12 and transmits the on/off information PDS in the operation state information LDS to the second control unit 14 (ST1a).

When the second switch unit 8 continues to be in the on state according to the control signal D14b, the voltage V2 is supplied to the charging type power supply 10 to continue the charging state, and the charging type power supply 10 continues to output the voltage V2.

The second control unit 14 receives the power supply voltage detection signal D19, the charging type power supply voltage detection signal D7, and the on/off information PDS, and the second control unit 14 performs control based on the condition that the charging power source 10 supplies the power source voltage V2.

When the power supply voltage detection signal D19 is displayed as "no power supply voltage" (YES in ST2), the second control unit 14 determines an abnormal state such as a power failure or an AC plug drop, and the on/off information PDS requires the device to be turned on. Further, even if the charging type power source voltage detection signal D7 detects the undercharged state, both the first switch unit 5 and the second switch unit 8 are in the off state (ST3). After the second control unit 14 is operated, the process returns to step ST2. However, there is a case where the power supply is lost and the operation cannot be continued (ST3a).

By such an operation, unnecessary circuit operation is suppressed, and the discharge path is not increased. As a result, power consumption is suppressed to a minimum, and an optimum low power consumption state can be maintained depending on the situation.

When the power supply voltage detection signal D19 indicates "there is a power supply voltage" (NO in ST2, and the charging type power supply voltage detection signal D7 indicates that charging is insufficient (voltage D2 is less than a predetermined value)), the second control unit 14 (YES in ST4) (Yes)), regardless of the content of the on/off information PDS, the control signal D14a is in the L state, and the control signal D14b is in the H state (ST5). Therefore, only the second switch portion 8 is in an on state. Charging of the charging type power source 10 is performed. Thereby, the undercharge can be deactivated preferentially. In this way, since the charging of the charging type power source 10 can be preferentially performed without increasing unnecessary power consumption, it is possible to maintain the most appropriate low power consumption state depending on the situation.

When the display voltage V2 is equal to or greater than the threshold value based on the charging power source voltage detection signal D7 (NO in ST4), it is determined whether or not the load circuit 12 and the first control unit 13 (ST6) continue to operate based on the on/off information PDS. The first switch unit 5 is controlled to be in an on state or a disconnected state.

That is, the on/off information PDS indicates that the load circuit 12 should be in an on state (when the on/off information PDS is in the H state), and the control signals D14a and D14b are all in the H state (ST7).

On the other hand, when the on/off information PDS indicates that the load circuit 12 should be in the off state (when the on/off information PDS is in the L state), the control signal D14a is in the L state, and D14b is in the H state (ST5).

After step ST5 or step ST7, the process returns to step ST2, and the same processing is repeated.

By providing the first switch unit 5 and the second switch unit 8 in this way, it is possible to independently control the configuration, and it is possible to maintain the most appropriate low power consumption state depending on the situation without increasing unnecessary power consumption.

Further, the second control unit 14 can maintain the low clock frequency because the processing speed is not required as compared with the first control unit 13. Further, the second control unit 14 does not need to switch the function of the clock or the like depending on the situation, and is fixed to the low clock frequency operation. Therefore, the second control unit 14 can be used in a low power consumption state without increasing unnecessary power consumption.

Instead of the single fixed circuit 6 of the power supply device of Fig. 1, an individual fixed circuit may be provided for the first and second switch units 5, 8. At this time, each fixed time signal can be set independently of each other.

First, the power supply voltage detection signal D19 from the main power supply voltage detecting circuit 19 and the charging power supply voltage detection signal D7 from the charging power supply voltage detecting circuit 7 are input to the second control unit 14, but the second control is performed. The function of the main power supply voltage detecting circuit 19 and the function of the charging type power supply voltage detecting circuit 7 are included in the unit 14, and the main power supply voltage detecting circuit 19 and the charging type power supply voltage detecting circuit 7 may be omitted.

When the second control unit 14 has the functions of the main power supply voltage detecting circuit 19 and the charging type power supply voltage detecting circuit 7, it is necessary to input the output voltage V0 of the main power supply 2 and the output voltage V2 of the charging power supply 10 to the control unit 14.

For example, in the first diagram, the charging type power supply voltage detection signal D7 is input to the terminal 14q of the second control unit 14, but when the charging type power supply voltage detecting circuit 7 is omitted, the power supply voltage V2 is input to the terminal 14p, and the second control unit 14 is provided. The detection or determination of the charging type power supply voltage V2 (determination of whether the voltage V2 is equal to or greater than a predetermined value) may be performed.

Further, although only one load circuit is shown in Fig. 1, the present invention can be applied to a case where power is supplied to a plurality of load circuits. In this case, the first switch unit (corresponding to the first switch unit 5 in FIG. 1) may be provided for each load circuit. At this time, the first control unit (the same as the first control unit 13 of Fig. 1) may be provided for each load circuit. When a plurality of control units for the load circuit are provided, the control unit (first control unit) for each load circuit inputs the operation state information LDS of each load circuit to the second control unit 14, and controls the processing in the second control unit 14. The operation state information LDS of the plurality of load circuits may be input to a control unit for the load circuit (the first control unit to be represented), and the first control unit that is representative of the second control unit 14 transmits all of the operation information. The configuration of the operating state information LDS of the load circuit is also possible.

In addition, in the first drawing, the first control unit 13 and the second control unit 14 are described in separate blocks, but the first control unit 13 and the second control unit 14 may be included in one package. Further, the configuration of the functions of the first control unit 13 and the second control unit 14 may be present on one wafer in one package.

[Second embodiment]

Fig. 4 is a view showing an electronic apparatus including a power supply device and a load circuit of a second embodiment of the present invention. In Fig. 4, the same reference numerals as in Fig. 1 show the same constituent elements. The power supply device of Fig. 4 is substantially the same as the power supply device of Fig. 1, but differs in that the insertion signal generation unit 15 is added.

The operation of the power supply device of the second embodiment is substantially the same as that of the power supply device of the first embodiment. Hereinafter, the difference in the first embodiment, that is, the processing content changed or added with the addition of the insertion signal generating unit 15 will be mainly described.

The power input terminal 15p of the insertion signal generating unit 15 is connected to the output terminal 10b of the charging type power supply 10, and the insertion signal generating unit 15 receives the supply of the voltage V2 from the charging type power supply 10.

The insertion signal generation unit 15 supplies the insertion signal D15 to the insertion information input terminal 14i of the second control unit 14.

The insertion signal generation unit 15 is composed of, for example, an operation input unit and/or a remote control signal reception unit. When the insertion signal generating unit 15 is constituted by the operation input unit, The insertion signal D15 is generated in accordance with the operation of the user who uses the operation input unit. When the insertion signal generating unit 15 is constituted by the remote control signal receiving unit, the signal D15 is inserted, for example, by a user operation using a remote controller (not shown). The insertion signal D15 has, for example, an energization command signal to the first control unit 13 and the load circuit 12, a power-off command signal, and the like.

Further, when the load circuit 12 is used for image display, the command signal for controlling the brightness of the displayed image and controlling the volume of the output sound may be the insertion signal D15.

The second control unit 14 outputs the control signal D14c to the first control unit 13 based on the input from the insertion signal generation unit 15.

The second control unit 14 also controls the first switch unit 5 when the load circuit 12 is energized or deactivated based on the input from the insertion signal generation unit 15.

Similarly to the first embodiment, when the first switch unit 5 supplies the voltage V1, the first control unit 13 starts the operation, and transmits the on/off information PDS to the second control unit 14 to start the load circuit 12. Control, but the control of the load circuit 12 includes control executed in accordance with the control signal D14c from the second control unit 14.

Similarly to the first embodiment, when the first control unit 13 and the load circuit 12 are connected to each other so that data can be transmitted bidirectionally, and the control signal D14c for energizing or de-energizing is supplied from the second control unit 14, the first The control unit 13 transmits control data D13c for energizing or de-energizing the load circuit 12.

Further, when the load circuit 12 has a function of video display and audio output, control and output for displaying the brightness of the image are supplied from the second control unit 14. When the volume control signal D14c of the sound is controlled, the control data D13c for controlling the brightness and the volume is transmitted from the first control unit 13 to the load circuit 12.

When the second switch unit 8 is in the ON state, the power supply voltage is supplied to the charging power source 10, and the output voltage V2 of the charging power source 10 is supplied to the insertion signal generating unit 15. The insertion signal generation unit 15 outputs the insertion signal D15 to the second control unit 14.

After the second control unit 14 starts operating after the supply of the voltages V0 and V2, the second control unit 14 does not receive the influence of the input of the insertion signal D15 until the second control unit 14 receives the on/off information PDS.

Therefore, the second control unit 14 does not receive the insertion signal D15 until the on/off information PDS is received, and the insertion of the insertion signal D15 is prevented, and the load circuit 12 and the first control unit 13 can be prevented from being inappropriately performed without being affected by the insertion signal D15. control.

The second control unit 14 starts operating, and after receiving the on/off information PDS, the second control unit 14 receives the insertion signal output D15 from the insertion signal generation unit 15.

When the insertion signal output D15 is an energization command to the first control unit 13 and the load circuit 12, a power-off command signal, or the like, the second control unit 14 performs an output control signal D14a or an output stop control signal D14a based on the insertion signal output D15.

When the insertion signal output D15 is a command signal for controlling the brightness of the image and the volume control of the output sound, the second control unit 14 outputs, for example, the control signal D14c of FIG. 4, and controls the first control unit 13 to control the load. Circuit 12.

Fig. 5 is a view showing the processing procedure of the second control unit 14 in Fig. 4 Specific example. In the fifth drawing, the main purpose is to make the priority of the processing clear, and to omit other details.

When the charging type power supply 10 starts supplying the voltage V2 (ST8), the second control unit 14 starts operating (ST9).

Then, the second control unit 14 shifts to a state of waiting to receive the on/off information PDS from the first control unit 13 (ST13).

In the state of waiting for the on/off information PDS, the sustaining signals D14a and D14b are maintained in the H state, and the switching units 5 and 8 are maintained in the on state (ST14).

Here, the second control unit 14 starts the processing main loop (ST15), and after the insertion prohibition processing (ST31) is executed, it is checked whether or not the main power supply 2 has the output voltage V0 (ST16). This is performed by investigating the output D19 of the main power supply voltage detecting circuit 19 (the signal D19 to the terminal 14s of the second control unit 14). Then, the switch units 5 and 8 are controlled based on the result of the confirmation (ST17). Therefore, depending on whether or not the main power source 2 has the output voltage V0, the processing for controlling the switch units 5, 8 is performed with the highest priority (before the processing for other control). Therefore, even when the AC voltage input 1 is cut off due to a power failure or the like (when it is in the L state), the state can be maintained rapidly and stably.

When the first control unit 13 supplies the on/off information PDS, the first control unit 14 inputs the on/off information PDS (ST18), and controls the first control unit 5 based on the input on/off information PDS (ST19).

The second control unit 14 performs a state in which the first switch unit 5 is in a state in which the first switch unit 5 is displayed in the corresponding on/off information PDS in accordance with the on/off information PDS.

That is, when the input power-on/off information PDS is currently stopped from the power supply of the main power source 2, when the display load circuit 12 is in the power-on state, the second control unit 14 controls The first switch unit 5 is continuously turned on, and power is continuously supplied to return the first control unit 13 and the load circuit 12 to the energized state.

On the other hand, when the input on/off information PDS is stopped when the power supply from the main power supply 2 is stopped, when the display load circuit 12 is in the power-off state, the second control unit 14 controls the first switch unit 5 to be turned off, and as a result, the first switch unit 5 is turned off. In a state where power is not supplied to the load circuit 12 and the first control unit 13, power consumption (power consumption during standby) is suppressed.

Finally, the insertion processing permission is released, that is, the prohibition insertion is released (ST32), and then the second control unit 14 detects the level of the output voltage V2 of the charging power source 10 by referring to the charging type power source voltage detection signal D7 (ST20). Based on the detection result, the second switch unit 8 is controlled (ST21). The load of the main power source 2 is reduced by controlling the second switch unit 8.

Therefore, the presence/absence of the output voltage V0 of the main power source 2 and the control (ST16, ST17) for controlling the switch units 5 and 8 based on the result of the priority are low, and the input of the on/off information PDS and the input according to the input are performed. The on/off information PDS is used to control the processing (ST18, ST19) of the first switching unit 5, and to check the level of the output voltage V2 of the charging power source 10, and to control the second switching portion 8 based on the inspection result. The processing (ST20, ST21) is executed preferentially. In other words, in the processing for controlling the three, it is confirmed whether or not the main power supply 2 has the output voltage V0, and the processing for controlling the switch units 5 and 8 based on the confirmation result (ST16, ST17) has the highest priority, and the on/off information is obtained. The input of the PDS and the processing for controlling the first switching unit 5 based on the input on/off information PDS (ST18, ST19) are the second highest priority, and the level of the output voltage V2 of the charging type power supply 10 is checked and based on The inspection result is used to control the processing of the second switch unit 8 (ST20, ST21) is preferred. The lowest degree.

Immediately after the main power supply 2 starts supplying electric power, the second control unit 14 maintains the control signal D14b in the H state regardless of the level of the output voltage V2 of the charging power supply 10, and maintains the second switching unit 8 in the ON state. The processing priority for checking the level of the output voltage V2 of the charging type power supply 10 can be lowered (steps ST20, ST21 are further delayed than steps ST16, S17, ST18, ST19, etc.).

Further, the processing frequency in the loop may be different depending on the processing priority order generated by the second control unit 14. For example, the processing of checking the presence or absence of the output voltage V0 of the main power supply line 2 in the complex configuration may be performed in the processing main loop, or the setting of the timer insertion may be performed to check whether the main power supply line 2 has the output voltage V0.

Further, the presence or absence of the output voltage V0 of the main power source 2 and the control of the first switch unit 5 and the second switch unit 8 (ST16, ST17), the input of the on/off information PDS, and the input/pass according to the result of the confirmation/ During the control of the first information on the first switching unit 5 (ST18, ST19) in the PDS content control, the insertion signal processing such as the energization and power-off command signals is prohibited. In this way, it is possible to suppress power consumption while stabilizing the entire device.

As described above, when the power supply voltage detection signal D19 indicates "no power supply voltage", the second control unit 14 determines that the power-on/off information PDS requires the device to be turned on even if it is determined to be in an abnormal state such as power failure or AC detachment. In the state, even if the charging type power supply voltage detection signal D7 detects the undercharged state, even if the insertion signal D15 is input, the first switching unit 5 and the second switching unit are kept in the off state. By performing such an operation, it is possible to suppress unnecessary circuit operation, and it is possible to suppress the power consumption to a minimum without increasing the discharge path. In this case, the most appropriate low power consumption state can be maintained.

On the other hand, when the power supply voltage detection signal D19 indicates "there is a power supply voltage" and the charging type power supply voltage detection signal D7 indicates that the charging is insufficient (the voltage V2 is less than a predetermined value), the second control unit 14 turns on/off the information PDS, or The content of the insertion signal D15 is such that the control signal D14a is in the L state and the control signal D14b is in the H state. Therefore, only the second switch unit 8 is turned on, and the charging type power source 10 is charged, so that the charging shortage can be canceled. In this way, since the configuration in which charging of the charging type power source 10 can be preferentially performed is employed, unnecessary power consumption is not increased, and the most appropriate low power consumption state can be maintained depending on the situation.

Further, in the fourth diagram, the control signal D14c is transmitted from the second control unit 14 to the first control unit 13, but the control signal D14c is output from the second control unit 14 to the load circuit 12, and the second control unit 14 directly controls the load circuit. The composition of 12 is also possible.

When the insertion signal D15 is an energization command signal and a power-off command signal to the first control unit 13 and the load circuit 12, the second control unit 14 may control the direct control signal D14a, and the first control unit 13 may be omitted. Control signal D14c.

Further, the above-described modifications relating to the first embodiment can also be applied to the second embodiment.

[Third embodiment]

Fig. 6 is a view showing an electronic apparatus including a power supply device and a load circuit of a third embodiment of the present invention. In Fig. 6, the power supply device of this embodiment is constituted by a portion other than the load circuit 12. That is, the power supply device includes the first and second fixed circuits 3 and 4, the first and second switch units 5, 8, and the first The second reset circuits 9, 11 and the charging type power supply 10, and the first and second control units 13, 14 and the insertion signal generating unit 15 are provided.

For the main power source 2, an AC voltage input (AC power input) from a commercial power source is supplied. The main power source 2 internally includes a transformer and a rectifier, and outputs a DC voltage V0.

The load circuit 12 supplies electric power from the main power source 2 through the first switch unit 5. Similarly to the load circuit 12, the first control unit 13 receives power supply from the main power source 2 via the first switch unit 5, and controls the operation of the load circuit 12.

The charging power source 10 supplies electric power from the main power source 2 without passing through the first switch unit 5, and is supplied with electric power by the second switch unit 8. The charging type power source 10 is composed of, for example, a super capacitor or a secondary battery.

The second control unit 14 receives power supply from the charging power source 10 and controls the passage of the first switch unit 5 and the second switch unit 8. Broken.

Each of the first control unit 13 and the second control unit 14 is configured by a microcomputer, and is initialized by receiving a reset pulse to be described later, and starts the operation.

The output voltage V0 of the main power supply 2 is applied to the input terminal 5a of the first switch unit 5, the input terminal 3a of the first fixed circuit 3, the input terminal 4a of the second fixed circuit 4, the input terminal 8a of the second switch unit 8, and the first The input terminal 11a of the circuit 11 and the first voltage detecting terminal 14s of the second control unit 14 are reset.

The output terminal 5b of the first switch unit 5 is connected to the power input terminal 12p of the load circuit 12, the power input terminal 13p of the first control unit 13, and the input terminal 9a of the first reset circuit 9, and therefore, the first switch unit 5 The output voltage V1 is applied to the load circuit 12, the first control unit 13, and the first reset circuit 9. The output voltage V1 of the first switching unit 5 is also referred to as the power supply voltage of the load circuit 12, the first control unit 13, and the first reset circuit 9.

The input terminal 9a of the first reset circuit 9 is connected to the main power supply 2 via the first switch unit 5, and the output terminal 9b of the first reset circuit 9 is connected to the reset signal input terminal 13r of the first control unit 13. When the output voltage V1 of the first switch unit 5, that is, the voltage of the input terminal 9a rises, the first reset circuit 9 generates a reset pulse and supplies it to the first control unit 13. This reset pulse is used for initialization of the first control unit 13.

The control signal input terminals 5d and 5e of the first switch unit 5 are supplied with an output signal (fixed time signal) D3 of the first fixed circuit 3 and a first control signal D14a of the second control unit 14 (for controlling the first switch). Signal of Part 5).

The first switch unit 5 is turned on (closed or on state) based on the output signal D3 of the first fixed circuit 3 or the first control signal D14a output from the second control unit 14.

When the first switch unit 5 is turned on, the first control unit D14a is in the first state, for example, in the H state, and is in the second state, for example, in the L state (low-level state). When the first control signal D14a is in the H state, it is often expressed as "the control signal is output in order to turn the first switch unit 5 into an ON state".

When the first switch unit 5 is turned on, the output signal D3 of the first fixed circuit 3 is in the first state, for example, in the H state, and is in the second state, for example, in the L state. When the output signal D3 is in the H state, it is often expressed as "outputting an output signal in order to turn the first switch unit 5 into an on state".

The first fixed circuit 3 is connected to the main power source 2 without passing through one of the first switch unit 5 and the second switch unit 8, and the output voltage V0 of the main power source 2 is applied. At the time of rising, a signal for turning on the first switch unit 5 is output. In other words, the first fixed circuit 3 starts to increase the voltage of the input terminal 3a, and outputs a signal of a predetermined time and a predetermined state, for example, an H state (high-level state).

The input terminal 11a of the second reset circuit 11 is connected to the main power supply 2 without passing through any of the first switch unit 5 and the second switch unit 8, and the output terminal 11b of the second reset circuit 11 is connected to the second control unit. The reset signal input terminal 14r of 14. When the output voltage V0 of the main power source 2, that is, the voltage of the input terminal 11a rises, the second reset circuit 11 generates a reset pulse and supplies it to the second control unit 14. This reset pulse is used for initialization of the second control unit 14.

The output terminal 8b of the second switch unit 8 is connected to the input terminal 10a of the charging type power supply 10, and the output terminal 10b of the charging type power supply 10 is connected to the power input terminal 14p and the second voltage detecting terminal 14q of the second control unit 14, and the insertion. The power supply input terminal 15p of the signal generating unit 15. Therefore, the output voltage V2 of the charging power source 10 is applied to the second control unit 14 and the insertion signal generating unit 15. The output voltage V2 of the charging type power supply 10 is also referred to as the power supply voltage of the second control unit 14 and the insertion signal generating unit 15. Further, the power input terminal 14p and the second voltage detecting terminal 14q of the second control unit 14 may be used in combination, and in this case, the second control unit 14 is divided.

The control signal input terminals 8d and 8e of the second switch unit 8 are connected to the output signal (fixed time signal) D4 of the second fixed circuit 4 and the second control signal D14b of the second control unit 14 (for controlling the second switch unit). 8 signal).

The second switch unit 8 is turned on in accordance with the output signal D4 of the second fixed circuit 4 or the second control signal D14b output from the second control unit 14.

When the second switch unit 8 is in the ON state, the second control unit D14b is in the first state, for example, in the H state, and is in the second state, for example, in the L state. When the control signal D14b is in the H state, it is often expressed as "the control signal is output in order to turn the second switch unit 8 into an ON state".

When the second switch unit 8 is turned on, the output signal D4 of the second fixed circuit 4 is in the first state, for example, in the H state, and is in the second state, for example, in the L state. When the output signal D4 is in the H state, it is often expressed as "outputting an output signal in order to turn the second switch unit 8 into an on state".

The second fixed circuit 4 is connected to the main power source 2 without passing through one of the first switch unit 5 and the second switch unit 8, and outputs the second switch unit 8 when the output voltage V0 of the main power source 2 rises. The signal of the state. In other words, the second fixed circuit 4 starts the voltage rise of the input terminal 4a, and outputs a signal of a predetermined time and a predetermined state, for example, an H state.

The insertion signal D15 from the insertion signal generation unit 15 is input to the insertion information input terminal 14i of the second control unit 14.

The insertion signal generation unit 15 is composed of, for example, an operation input unit and/or a remote control signal reception unit. When the insertion signal generating unit 15 is constituted by the operation input unit, the insertion signal D15 is generated in accordance with the operation of the user who uses the operation input unit. When the insertion signal generating unit 15 is constituted by the remote control signal receiving unit, the signal D15 is inserted, for example, by a user operation using a remote controller (not shown). The insertion signal D15 has, for example, an energization command signal to the first control unit 13 and the load circuit 12, a power-off command signal, and the like. Further, when the load circuit 12 is used for image display, the command signal for controlling the brightness of the displayed image and controlling the volume of the output sound may be the insertion signal D15.

The second control unit 14 outputs the control signal D14c to the first control unit 13 based on the input from the insertion signal generation unit 15.

The second control unit 14 is initialized based on the reset pulse output from the second reset circuit 11, and starts the operation. After the initialization is completed, the first control signal D14a for turning on the first switch unit 5 and the first control signal D14a are output. The second switch unit 8 is in the on state of the second control signal D14b.

The second control unit 14 also controls the first and second switching units 5 and 8 based on the output voltage V0 of the main power supply 2, and performs control of the first switching unit 5 based on the on/off information PDS, and according to the charging type. The output voltage V2 of the power supply 10 controls the second switching unit 8. When the second signal control unit 15 energizes and de-energizes the load circuit 12, the second control unit 14 controls the first switch unit 5.

The control of the switches 5 and 8 generated by the second control unit 14 is performed in the H state or the L state according to the control signals D14a and D14b, but the switch units 5 and 8 are output signals according to the fixed circuits 3 and 4 as described above. D3 and D4 are also in an ON state, and even if the second control unit 14 performs control for cutting off the switch units 5 and 8 (even if D14a and D14b are in the L state), the switch units 5 and 8 tend to be kept in an ON state.

The first control unit 13 starts the initial operation of the reset pulse output from the first reset circuit 9, and after the initialization is completed, the on/off information PDS, which will be described later, is transmitted to the second control unit 14, and the control of the load circuit 12 is started. . The control of the load circuit 12 includes control executed in accordance with the control signal D14c from the second control unit 14.

The first control unit 13 and the load circuit 12 are connected to each other. Two-way transmission of information. For example, the control data D13c is transmitted from the first control unit 13 to the load circuit 12, and the data indicating the state thereof is transmitted from the load circuit 12 to the first control unit 13.

For example, whether the external connection terminals of the load circuit 12 are connected to the display information of the signal line for transmitting the signal, and the display information of the state of the transfer switch manually operated by the load circuit 12 is transmitted from the load circuit 12 to the first control unit 13 .

On the other hand, when the control signal D14c for energizing or de-energizing is supplied from the second control unit 14, the first control unit 13 transmits the control data D13c for energizing or de-energizing the load circuit 12.

When the load circuit 12 has a function of displaying video and outputting sound, when the control unit D14c for controlling the brightness of the image and the volume control of the output sound is supplied from the second control unit 14, the brightness is controlled. The volume control data D13c is transmitted from the first control unit 13 to the load circuit 12.

When the second control unit 14 transmits the control data D13c in the state before the power supply to the load circuit 12 is stopped, the first control unit 13 transmits the control data D13c from the second control unit 14 to the first control unit 13, the first control unit. The load circuit 12 is controlled in accordance with the data stored in the internal display load circuit 12 before the power supply is stopped.

When the control data D13c is transmitted from the first control unit 13 to the load circuit 12, the setting data of the control data D13c is held in the register 12m in the load circuit 12.

For example, the setting value of the brightness and the set value of the volume are held in the register 12m in the load circuit 12 based on the control data D13c for controlling the brightness and volume of the image. The held setting data is used for the motion control of the load circuit 12.

The data held in the register 12m is transmitted from the load circuit 12 to the first control unit 13 as the operation state information (information indicating the operation state of the load circuit 12) LDS (part of) when the load circuit 12 is powered off. It is stored in the non-volatile memory 13m (for example, constituted by EEPROM) in the first control unit 13.

In the non-volatile memory 13m, when the power supply to the load circuit 12 is stopped, the information (on/off information) PDS indicating whether or not the load circuit 12 is in the power-on state is stored as a part of the operation state information LDS. The on/off information PDS is transmitted from the first control unit 13 to the second control unit 14, and is also held in the second control unit 14. In other words, when the initialization is completed, the first control unit 13 transmits the on/off information indicating whether or not the load circuit 12 is in the energized state when the power supply to the load circuit 12 is stopped before the initialization (when the power supply is stopped from the initialization). Second control unit

When the power supply to the load circuit 12 is stopped, a power failure occurs, the AC power supply 2 is disconnected from the AC voltage input 1 due to the AC plug being disconnected, or the first switch unit 5 is turned off.

The on/off information PDS is generated as follows. In other words, when the load circuit 12 is normally powered off, the information indicating that the power is off is transmitted from the load circuit 12 to the first control unit 13 and stored in the first control unit 13. On the other hand, when the power supply is stopped, the above-mentioned "display of normal power-off information" is not transmitted, and the first control unit 13 does not store the information in the first control unit 13, and when the power supply is stopped, the load can be judged. Circuit 12 is in an energized state. Based on such determination, the first control unit 13 generates information indicating that the load circuit 12 is energized when the power supply to the load circuit 12 is stopped, or displays the load circuit 12 when the power supply to the load circuit 12 is stopped. It is the information of the power-off state, and it is stored in the internal non-volatile memory within 13m.

Fig. 7 shows a specific example of the first fixed circuit 3 and the first switch unit 5. In the illustrated example, the first fixed circuit 3 is configured by, for example, a series circuit of a capacitor 301 and a resistor 302. The first switch unit 5 is connected by a P-channel MOSFET 501, a resistor 502, a capacitor 503, resistors 504 and 505, and NPN as shown. The transistor 506 and the diode 507 are formed.

When the potential of the gate G of the FET 501 is lower than the threshold value, the source S and the drain D are electrically connected (becomes in an on state).

Similarly to the first fixed circuit 3 and the first switch unit 5, the second fixed circuit 4 and the second switch unit 8 in Fig. 6 can be configured as shown in Fig. 8.

That is, in Fig. 8, the second fixed circuit 4 is constituted by, for example, a series circuit of a capacitor 401 and a resistor 402, and the second switch unit 8 is connected by a P-channel MOSFET 801, a resistor 802, a capacitor 803, resistors 804 and 805, as shown. The NPN transistor 806 and the diode 807 are formed.

When the potential of the gate G of the FET 801 is lower than the threshold value, the source S and the drain D are electrically connected (becomes in an on state).

When the output voltage V0 of the main power supply 2 rises, the output circuit D4 of the second fixed circuit 4 is in the H state for a certain period of time due to the series circuit of the capacitor 401 and the resistor 402 in the second fixed circuit 4, and therefore, the second switch unit 8 is in the second switch unit 8. The transistor 806 is turned on. When the transistor 806 is turned on, a parallel circuit through the resistor 802 and the capacitor 803 and a series circuit current of the resistor 804 and the transistor 806 flow, the gate of the FET 801 is at a low potential, and the FET 801 is turned on, and the output voltage V0 of the main power source 2 is turned on. The second switch unit 8 is supplied to the charging power source 10.

Similarly, when the output voltage V0 of the main power source 2 rises, In the series circuit of the capacitor 301 and the resistor 302 in the fixed circuit 3, the output D3 of the first fixed circuit 3 is in the H state for a certain period of time. Therefore, the transistor 506 in the first switch unit 5 is turned on. When the transistor 506 is turned on, a parallel circuit through the resistor 502 and the capacitor 503 and a series circuit current of the resistor 504 and the transistor 506 flow, the gate of the FET 501 is at a low potential, and the FET 501 is turned on, and the output voltage V0 of the main power source 2 is turned on. The first switch unit 5 is supplied to the first control unit 13 .

When the rise of the output voltage V0 of the main power supply 2 has elapsed for a predetermined period of time, even if the output D3 of the first fixed circuit 3 is in the L state, the control signal D14a of the second control unit 14 is also in the H state, whereby the first switch unit 5 is inside. The transistor 506 is kept turned on, and as a result, the FET 501 is kept turned on, and the output voltage V0 of the main power source 2 is continuously supplied to the first control unit 13 and the load circuit 12 through the first switch unit 5.

Similarly, the rise of the output voltage V0 of the main power supply 2 has elapsed for a predetermined period of time, and even if the output D4 of the second fixed circuit 4 is in the L state, the control signal D14b of the second control unit 14 is in the H state, whereby the second switch is used. The transistor 806 in the portion 8 is kept turned on, and as a result, the FET 801 is kept turned on, and the output voltage V0 of the main power source 2 is continuously supplied to the chargeable power source 10 through the second switch unit 8.

The ninth (a) to (g) graphs show the operation of the fixed circuits 4 and 5 and the operation of the switches 5 and 8 when the power from the main power source 2 is supplied from the sixth diagram.

When the AC voltage input 1 is connected and the output voltage V0 of the main power supply 2 rises from the L state to the H state (the time ta at the 9th (a) diagram), the output signals D3 and D4 of the first and second fixed circuits 3 and 4 continue. The predetermined duration H state (Tc3, Tc4 in Figures 9(b) and (c)). Due to the outputs D3, D4 of the first and second fixed circuits 3, 4 In the H state, the first and second switching units 5 and 8 are changed to the ON state with a certain delay (time tb in the ninth (d) and (e)).

As a result, the output voltage V1 of the first switching unit 5 and the output voltage V2 of the charging power supply 10 rise with a certain delay (the time tc of the ninth (f) and (g) diagrams), and the first one can be started. And control of the second control units 13 and 14.

As described above, the charging type power supply 10 is charged when the second switching unit 8 is turned on. However, when the charging type power supply 10 is charged in advance, the output voltage V2 of the charging type power supply 10 is as shown in the ninth (g) diagram. As indicated by the dotted line, the H state is earlier than the rise indicated by the solid line, and the second control unit 14 continues control from there before.

Further, in the figures (b) and (c), the times (Tc3, Tc4) in which the output signals D3 and D4 of the first and second fixed circuits 3 and 4 are in the H state are the same, but these times are different from each other. can.

The tenth (a) to (m) diagrams show the operation of each unit when the power is supplied from the main power source 2 in the apparatus of Fig. 6.

When the AC voltage input 1 is connected and the output voltage V0 of the main power supply 2 rises from the L state to the H state (the time ta at the 10th (a) diagram), the output signals D3 and D4 of the first and second fixed circuits 3 and 4 continue. The predetermined duration H state (Tc3, Tc4 of the 10th (b), (c) figure). Since the outputs D3 and D4 of the first and second fixed circuits 3 and 4 are in the H state, the first and second switching units 5 and 8 are changed to the on state with a certain delay (10th (d), (e) The time tb) of the figure.

As a result, the output voltage V1 of the first switching unit 5 and the output voltage V2 of the charging power supply 10 rise with a certain delay (the tenth (f), the time tc of the (i) diagram), and the first one can be started. And control of the second control units 13 and 14.

Further, it is assumed that the same charging type power supply 10 as described above is not charged in advance. When the charging type power supply 10 is precharged, the output voltage V2 of the charging type power supply 10 is in the H state as indicated by the dotted line on the tenth (f) line, which is earlier than the rise indicated by the solid line.

As described above, when the AC voltage input 1 is connected and the output voltage V0 of the main power source 2 rises to the H state (ta), the reset pulse D11 is output from the second reset circuit 11 (Fig. 10(g)). According to this reset pulse D11, the second control unit 14 is in an initialized state. In other words, at the time (td) at which the reset pulse D11 falls, the voltage applied to the power supply input terminal 14p, that is, the output voltage V2 of the charge type power supply 10 is in the H state, the initialization of the second control unit 14 is started (the 10th ( h) Figure).

As shown in the tenth (b) and (c), when the output signals D3 and D4 of the first and second fixed circuits 3 and 4 are in the H state, the second control unit 14 ends the initialization and shifts to the wait-on/off information PDS. The state of the input (time te of the 10th (h) diagram). (In other words, until the second control unit 14 ends the initialization, the fixed circuits 3 and 4 are configured to hold the output signals D3 and D4. Therefore, the set signals D3 and D4 are held in the H state (duration) Tc3. The Tc4 specific gravity is set to have a longer duration of the pulse D11. When the state is shifted to the state of waiting for the above-described on/off information PDS, the second control unit 14 sets the control signals D14a and D14b to the H state (10th (1), (m)). The moment of the figure te). The control signals D14a and D14b are supplied to the switches 5 and 8, respectively, thereby maintaining the on state of the switches 5 and 8. As a result, since the power supply to the first control unit 13 and the load circuit 12 and the charging power source 10 is continued, the power supply to the second control unit 14 is continued, and the steady state is maintained.

As described above, when the output signal D3 of the first fixed circuit 3 is in the H state, the first switch unit 5 is turned on (time tb in the tenth (d) diagram), When the first control unit 13 and the load circuit 12 start to supply electric power (time tc in the tenth (i)th diagram), the reset pulse D9 is output from the first reset circuit 9 (Fig. 10(j)). According to this reset pulse D9, the first control unit 13 is in an initialized state. In other words, when the reset pulse D9 falls (tf), a voltage is applied to the power supply input terminal 13p, that is, the initialization of the first control unit 13 is started under the condition that the output voltage V1 of the first switch unit 5 is in the H state (No. 10). (k) Figure).

In the initialization stage, the first control unit 13 performs the process of reading the information indicating the state of the display load circuit 12, etc., and the initialization of the first control unit 13 may take longer than the initialization of the second control unit 14, but wait for the above. In the state of the on/off information PDS of the initialization of the second control unit 14, in accordance with the process of setting the control signals D14a and D14b to the H state, since the switch units 5 and 8 are maintained in the on state, the first control unit 13 is not interrupted. And the power supply of the load circuit 12.

When the initialization of the first control unit 13 is completed, the control of the load circuit 12 is started (time tg in Fig. 10(k)).

The first control unit 13 starts to control the load circuit 12, and the on/off information PDS in the operation state information LDS is transmitted to the second control unit 14.

When the second control unit 14 receives the on/off information PDS, the second control unit 14 controls the on/off of the first switch unit 5 (Fig. 10(d)) and the charging according to the on/off information PDS. The output voltage V2 of the type power supply 10 controls the on and off of the second switch unit 8 (Fig. 10(e)). At the same time, the first control unit 13 and the load circuit 12 are controlled based on the output signal D15 from the insertion signal generating unit 15, and the control of the first switching unit 5 is also possible.

As described above, when the load circuit 12 is powered off, the operating state information (information indicating the state of the load circuit 12) LDS is transmitted from the load circuit 12 to the first. The control unit 13 is held in the internal nonvolatile memory 13m in the first control unit 13.

The operation state information LDS includes setting values for displaying various operation states of the load circuit 12. For example, when the load circuit 12 has a function of image display and sound output, it includes a set value of brightness and a set value of volume.

When the power supply to the load circuit 12 from the main power source 2 is stopped (a voltage is applied to the power supply input terminal 12p), whether the load circuit 12 is in an energized state or a power-off state, that is, the on/off information PDS is displayed as part of the operation state information LDS. It is held in the non-volatile memory 13m of the first control unit 13.

The energization state of the load circuit 12 is a program start state for the original operation of the load circuit 12 (the load circuit 12 is a video display device and a video display). Therefore, the power supply state of the load circuit 12 is a state in which the original operation is performed, and the power-off state is performed. When the load circuit 12 generated by the above program is completed, the load circuit 12 is not in the original operation state. The generation of on/off information is described later.

After the first control unit 13 is initialized, the control data D13c is supplied to the load circuit 12, and the operation of the load circuit 12 is controlled, and the second control unit 14 outputs the on/off information PDS (the time th of the 10th (k)th map). ).

When the first control unit 13 outputs the on/off information PDS indicating that the load circuit 12 is in the energized state, the second control unit 14 controls the conduction state of the first switch unit 5 to continue, and continues to supply electric power to restore the load circuit 12 to the energized state. .

When the first control unit 13 outputs the on/off information PDS indicating that the load circuit 12 is in the power-off state, the second control unit 14 controls the first switch unit 5 to be in the off state (open or disconnected state). As a result, power supply to the first control unit 13 and the load circuit 12 is maintained and stopped. This state is called the standby state. In the standby state, borrow By stopping the supply of electric power to the first control unit 13 and the load circuit 12, power consumption (power consumption during standby) can be reduced.

The output voltage V2 of the charging type power supply 10 is sufficiently high (H state), and when the load circuit 12 is in the power-off state, when the insertion signal generating unit 15 supplies the energization command signal of one of the insertion signals to the second control unit 14, the second control unit When the control signal D14a is in the H state, the first switching unit 5 is turned on, and the control is performed to start supplying power to the first control unit 13 and the load circuit 12, and the initialization of the first control unit 13 is completed. In the middle (after a predetermined period of time), the control signal D14c for energization is output to the first control unit 13, and the first control unit 13 and the load circuit 12 are turned on.

When the output voltage V2 of the charging type power supply 10 is in the H state, and the insertion signal generating unit 15 outputs the power-off command signal to the second control unit 14 when the load circuit 12 is in the energized state, the second control unit 14 first outputs the power-off. The control signal D14c to the first control unit 13 causes the first control unit 13 and the load circuit 12 to be in a power-off state. When the first control unit 13 and the load circuit 12 are in a stable state and are in a power-off state (after a predetermined period of time elapses), the second control unit 14 sets the control signal D14a to the L state, thereby performing control so that the first switch unit 5 is cut. Broken (open) state.

Then, even when the first control unit 13 and the load circuit 12 are in the power-off state while the power is being supplied from the main power source 2, the first control unit 13 and the load circuit 12 are disconnected from the main power source 2, and are shifted to the standby state. As a result, power consumption is suppressed (power consumption during standby).

When the first reset circuit 9 outputs the reset pulse for detecting the power supply stop to the first control unit 13 and shifts to the power-off state in which the first control unit 13 is stabilized, the first reset circuit 9 is configured to stop the power supply from the first switch unit 5. According to the second control unit The control timing for cutting the first switch unit 5 may be different from the above, and when the insertion signal generating unit 15 receives the power-off command signal, the control signal D14c for turning off the power may be output to the first control unit 13 to Since the control signal D14a of the first switch unit 5 is in the L state, the first switch unit 5 may be turned off.

The eleventh (a) and (b) diagrams show the output voltage V2 of the charging type power supply 10 of Fig. 6 and the operation of the second switching unit 8 based on the output voltage V2. When the second control unit 14 supplies the on/off information PDS from the first control unit 13 (Fig. 10(k)), the second control unit 14 starts the control of the second switch unit 8 based on the on/off information PDS (10th ( h) The moment of the graph th). The control of the second switch unit 8 is performed asynchronously with the control of the first switch unit 5, that is, according to a different master.

Fig. 11(a) shows the state of the second switch unit 8, and Fig. 11(b) shows the output voltage V2 of the charging type power supply 10. When the second control unit 14 detects the output voltage V2 of the charging power supply 10 and is lower than the set threshold value V2t, the control signal D14b is in the H state. Therefore, the second switching unit 8 is turned on.

Thereafter, when the control signal D14b is returned to the L state when the predetermined time Te has elapsed, the second switch unit 8 is turned off (FIG. 11(b)). The predetermined time Te is set in advance as the time required to fully charge the charging type power supply 10.

Instead, the control as shown in Fig. 12(a) and (b) may be performed. In other words, when the upper limit threshold V2u of the voltage V2 is set and the voltage V2 is higher than the upper limit threshold V2u (Fig. 12(b)), the control signal D14b returns to the L state, and therefore the second switch unit 8 returns to the cut state. (Fig. 12(a)) is also available. At this time, electricity When the pressure V2 falls to the threshold value (lower limit threshold value) V2t, the control signal D14b is in the H state and the second switching portion 8 is in the ON state.

When the second control unit 8 is in the OFF state, the second control unit 14 is disconnected from the main power supply 2, and the first control unit 13 and the load circuit 12 are in an energized state, but the power consumption by the second control unit 14 is not obtained. The entire electronic machine reduces power consumption. In the period in which the power consumption is reduced, the period in which the first control unit 13 and the load circuit 12 are in the power-off state (the power consumption in the period is referred to as "standby power consumption") is a period in which power consumption is suppressed (power consumption). Reduce the period).

In addition, the second control unit 14 is configured to control the second switching unit 8 independently of the control of the first switching unit 5, and sets the critical value (V2t, V2u) of the output voltage V2 of the charging power supply 10, The setting of the on-state duration (Te) of the second switch unit 8 can be optimally set based on the power consumed by the second control unit 14. As a result, with respect to the main power source 2, it is possible to shorten the time of the connection of the rear load more than the second switch unit 8, and it is possible to lengthen the period during which the power consumption is reduced.

Fig. 13 is a view showing an example of the processing procedure of the second control unit 14 of Fig. 6. In Fig. 13, the main purpose is to make the priority of the processing clear, and to omit other details.

When the reset pulse D11 is input from the second reset circuit 11, the second control unit 14 is reset (ST11), and initialization processing is performed (ST12).

Next, the second control unit 14 shifts to a state of waiting to receive the on/off information PDS from the first control unit 13 (ST13).

In the state of waiting for the on/off information PDS, the control signals D14a, D14b are maintained. In the H state, the switch units 5 and 8 are maintained in the ON state (ST14).

Here, the second control unit 14 starts the processing of the main loop (ST15), and checks whether or not the main power source 2 has the output voltage V0 (ST16). This is performed by investigating the voltage of the terminal 14s. If the threshold value V0th or more is satisfied, the voltage is judged as "present", and if it is not, the voltage is determined to be "none". Then, based on the result of the confirmation, the switch units 5 and 8 are controlled (ST17). Therefore, depending on whether or not the main power source 2 has the output voltage V0, the processing for controlling the switch units 5, 8 is performed with the highest priority (before the processing for other controls). Therefore, even when the AC voltage input 1 is cut off due to a power failure or the like (when the L state is reached), the state can be maintained rapidly and stably.

When the on/off information PDS is supplied from the first control unit 13, the second control unit 14 inputs the information PDS (ST18), and controls the first switch unit 5 based on the input on/off information PDS (ST19).

The second control unit 14 performs a state of controlling the state in which the first switch unit 5 is in the state corresponding to the on/off information PDS, based on the control of the first switch unit 5 of the on/off information PDS.

In other words, when the input of the on/off information PDS is stopped when the power supply from the main power source 2 is stopped, the second control unit 14 controls the conduction state of the first switch unit 5 to continue. Power is supplied, and the first control unit 13 and the load circuit 12 can be restored to the energized state.

On the other hand, when the power supply from the main power supply 2 is stopped and the load circuit 12 is in the power-off state, the second control unit 14 controls the first switch unit 5 to be turned off. status. As a result, power is not supplied to the load circuit 12 and the first control unit 13, and power consumption (power consumption during standby) is suppressed.

Finally, the second control unit 14 detects the level of the output voltage V2 of the charging power source 10 (ST20), and according to the level of the detected voltage V2, as shown in the eleventh (a), (b) or twelfth (a) The second switch unit 8 is controlled as shown in (b) (ST21). Due to the control of the second switch unit 8, the load of the main power source 2 is reduced.

Then, the input of the on/off information PDS and the on/off information PDS according to the input are used to control the processing of the first switching unit 5 (ST18, 19), and the priority ratio is confirmed whether or not the main power supply 2 has the output voltage V0, and according to this The result of the check is used to control the processing (ST16, 17) of the switch units 5, 8 to be low, and to check the level of the output voltage V2 of the charge type power supply 10 and to control the processing of the second switch unit 8 based on the result of the check. (ST20, 21) is executed first. In other words, in the processing for the three control, it is confirmed whether or not the main power supply 2 has the output voltage V0, and the processing (ST16, 17) for controlling the switching units 5 and 8 based on the result of the confirmation has the highest priority, and the on/off information is on/off. The input of the PDS and the on/off information PDS for controlling the first switch unit 5 are used to control the priority of the first switch unit 5 (ST18, 19), the level of the output voltage V2 of the rechargeable power supply 10 is checked, and the result of the check is used. The process of controlling the second switch unit 8 (ST20, 21) has the lowest priority.

Immediately after the supply of electric power from the main power supply 2, the second control unit 14 maintains the control signal D14b in the H state regardless of the level of the output voltage V2 of the charging power supply 10, and maintains the second switching unit 8 in the ON state. The priority of the process for checking the level of the output voltage V2 of the charging type power supply 10 can be lowered (after the delays ST20, ST21 to ST21 to ST17, ST18, and ST19).

The processing frequency in the loop may be different depending on the processing priority order of the second control unit 14. For example, check the main power supply 2 for the output voltage V2. The processing frequency can be configured in the processing main loop, or a timer can be set, and the processing for checking whether the main power source 2 has the output voltage V2 can be inserted.

Fig. 14 is a view showing a prohibition range of the input processing from the insertion signal generating unit 15 in the processing of the second control unit 14 of the third embodiment. In Fig. 14, the same reference numerals as in Fig. 13 denote the same processing. In Fig. 14, between the step ST15 and the step ST16, the insertion prohibition processing (ST31) is executed, and between the step ST19 and the step ST20, the insertion processing permission is executed (ST32). According to the insertion prohibition processing (ST31), the insertion prohibition is started, and the insertion prohibition is released according to the insertion processing permission (ST32). As a result, it is confirmed whether or not the main power source 2 has the output voltage V0, and the control of the first switch unit 5 and the second switch 8 based on the result of the confirmation (ST16, 17), the input of the on/off information PDS, and the on/off according to the input. During the control (ST18, 19) of the first switch unit 5 of the content of the information PDS, the insertion signal processing such as the energization and power-off command signals is prohibited. Thereby, while maintaining the entire apparatus, it is possible to suppress power consumption.

Fig. 15 is a view showing an example in which the second control unit 14 according to the third embodiment controls the switch units 5 and 8 in accordance with the output voltage V0 of the main power source 2.

In Fig. 15, the same reference numerals as in Figs. 13 and 14 denote the same processing.

In the step ST41 after step ST31, the second control unit 14 confirms whether or not the main power supply 2 has the output voltage V0 (ST41), and the main power supply 2 has no output voltage V0 (when "NO" in ST41), and determines that the power is off due to power failure. When the AC voltage input 1 is turned off, the fixed switch units 5 and 8 are turned off (ST42), and when the AC voltage input is restored, the output voltage V0 of the main power source 2 returns to the steady-state operation value (H state) (ST43). When the middle is "YES", the processing keeps the switch units 5 and 8 in the off state.

When the output voltage V0 of the main power source 2 returns to the H state (YES in ST43), the second reset circuit 11 of Fig. 6 outputs the reset pulse D11, thereby inputting power to the second control unit 14. The application voltage of the terminal 14p, that is, the output voltage V2 of the charging type power supply 10 is in the H state, and the second control unit 14 is reset to perform initialization restart. That is, the microcomputer constituting the second control unit 14 is hard-weighted.

With this configuration, the main power supply 2 has no output voltage V0 until it is restored (from "NO" in step ST41 to "YES" in ST43), and since the insertion signal processing is prohibited, the entire holding device can be stably held, and consumption can be suppressed. electric power.

When the main power source 2 has no output voltage V0 until the recovery (from "NO" in step ST41 to "YES" in ST43), the first switching portion 5 is controlled not to be executed based on the input on/off information PDS. The processing (ST18, 19) and the processing of the second switching unit 8 are controlled by the output voltage V2 of the charging type power supply 10 (ST20, 21). The control of the first and second switching units 5 and 8 can be controlled by the first switching unit 5 (ST18, 19) and the charging type according to the on/off information PDS. The output voltage V2 of the power supply 10 controls the second switching unit 8 (ST20, 21) to execute preferentially.

(a) to (d) of FIG. 16 show an operation in which the control switch units 5 and 8 are in a disconnected state when the main power source 2 has no output voltage V0 in the process of the second control unit 14 in FIG. While the main power supply 2 has the output voltage V0, the first switching unit 5 is controlled based on the on/off information PDS, and the second switching unit 8 is controlled according to the output voltage V2 of the charging power supply 10, but the main power supply 2 has no output voltage V0 (16th) (a) Time tj) of the figure, after a certain delay time, the second control unit 14 controls the switch units 5, 8 After that, it is maintained in the cut-off state (after the time tk in the 16th (b) and (c)).

When the second switch unit 8 continues to be turned off, the output of the charge type power supply 10 continues to fall (Fig. 16(d)), and becomes lower than the threshold value V2t, but the main power source 2 has no output voltage V0, and the second The switch unit 8 is continuously turned off.

With such a configuration, when the main power source 2 has no output voltage V2, the standby state is continued (the switches 5 and 8 are turned off, and the power supply to the load circuit 12, the first control unit 13, and the first reset circuit 9 is not performed. At the same time, when the output voltage V0 of the main power source 2 is restored, it can be stably returned to the original state.

[Fourth embodiment]

Fig. 17 is a view showing a power supply device of a fourth embodiment of the present invention.

The power supply device of the fourth embodiment is substantially the same as the power supply device of the third embodiment shown in Fig. 6, but differs in the following points.

That is, the configuration of Fig. 6 includes, for example, an indicator element composed of the light-emitting diodes 17, a resistor 16, and an NPN-type transistor 18. One end of the resistor 16 is connected to the output side of the charging type power supply 10, the anode of the light emitting diode 17 is connected to the other end of the resistor 16, the cathode of the light emitting diode 17 is connected to the collector of the transistor 18, and the transistor 18 is fired. The pole is grounded, and the base of the transistor 18 receives the control signal D14d of the second control unit 14.

Controlled by the control signal D14d, when the transistor 18 is turned on, the resistor 16 and the light-emitting diode 17 pass through the current, and the light-emitting diode 17 emits light. When the transistor 18 is intermittently turned on, the light-emitting diode 17 repeatedly blinks.

Fig. 18 is a view showing an example of a process in which the second control unit 14 drives the light-emitting diodes 17 in the block diagram of Fig. 17.

When the main power supply 2 has no output voltage V0 (NO in ST41), the second control unit 14 determines that the AC voltage input 1 is turned off due to a power failure, and the switch unit 5 is fixed. 8 is the cut-off state (ST42), and the light-emitting diode 17 is driven to light or blink (ST51).

When the output voltage V0 of the main power source 2 is restored (YES in step ST43), the switch units 5 and 8 are kept in the off state (ST42), and the driving of the light-emitting diodes 17 is maintained (ST51).

When the output voltage V0 of the main power supply 2 is restored (YES in step ST43), the second reset circuit 11 of FIG. 6 outputs the reset pulse D11, resets the second control unit 14, and performs initialization processing. Start again. The driving of the light-emitting diode 17 is stopped due to restarting.

19(a) to (d) show an example of a process in which the second control unit 14 shown in Fig. 17 drives the light-emitting diodes 17. Figures 19(a) to (c) are the same as Figures 16(a) to (c). When the main power source 2 has no output voltage V0 (tj in the 19th (a) diagram), the second control unit 14 controls to maintain the switch units 5 and 8 in the off state after a plurality of delay times (19(b), (c). ) The moment tk) of the graph. At the same time, the second control unit 14 starts driving the lighting or blinking of the light-emitting diode 17 (Fig. 19(d)).

According to such a configuration, when the main power source 2 has no output voltage V0, the standby state in which power consumption is reduced as much as possible is continuously stabilized, and the output voltage V0 of the user's main power source 2 is notified by the light-emitting diode 17 to disappear. Confirm the status of AC voltage input 1. On the other hand, when the output voltage V0 of the main power source 2 is restored, it can be stably returned to the original state.

[Fifth Embodiment]

The configuration of the power supply device according to the fifth embodiment of the present invention is the same as that shown in Fig. 6, but the operation of the second control unit 14 is different.

Fig. 20 is a view showing an example of the processing of the second control unit 14 in the fifth embodiment. In Fig. 20, the same reference numerals as in Fig. 15 denote the same processing. The step ST43 of Fig. 15 is replaced by the difference, and step ST61 is set.

In the processing shown in Fig. 20, the second control unit 14 waits until the output voltage V0 of the main power source 2 is restored, shifts to the sleep mode, and performs the operation in the sleep mode. In the sleep mode, the necessary parts are restarted, for example, only the memory that supplies power to the data necessary for the memory restart is executed, and the power supply is not performed to the other parts.

The second control unit 14 confirms whether or not the main power supply 2 has the output voltage V0 (ST41), and when the main power supply 2 has no output voltage V0 ("NO" in step ST41), it is determined that the AC voltage input 1 is turned off due to a power failure or the like, and the switch unit is fixed. In the disconnection state (ST42), the components of the microcomputer or the like constituting the second control unit 14 shift to the sleep mode (ST61).

By the AC voltage input recovery, the main power supply 2 resumes the output voltage V0, and the switch units 5 and 8 are kept in the off state, and the processing is performed while maintaining the sleep mode.

When the output voltage V0 of the main power supply 2 is restored in the sleep mode (ST61), the second reset circuit 11 of FIG. 6 resets the second control unit 14 based on the reset pulse D11 (ST11), and outputs it. The restart is started from the process of setting the second control unit 14 and performing initialization.

With such a configuration, when the main power source 2 has no output voltage V0, the power consumption state is further reduced (the switch units 5 and 8 are cut off, and not only the power supply to the negative is not performed. When the load circuit 12, the first control unit 13 and the first reset circuit 9 are in the sleep state, the second control unit 14 is stabilized for a long time, and the output voltage V0 of the main power supply 2 is restored, it is stable. Go back to the original state.

[Sixth embodiment]

Figure 21 is a view showing an image display device of a sixth embodiment of the present invention. The embodiment of Fig. 21 corresponds to the case where the electronic device of Fig. 6 is a video display device, and the load circuit 12 of Fig. 6 is constituted by a circuit for performing processing for image display, and the image signal VD is input to the load. Circuit 12. The image signal VD can represent a still picture or an animation. The point other than the above, the embodiment of Fig. 21 is the same as the embodiment of Fig. 6.

Further, in each of the embodiments, the first control unit 13 controls the entire load circuit 12, and it is necessary to perform complicated and high-speed processing in the control. On the other hand, the processing executed by the second control unit 14 detects the level of the output voltage V2 of the charging power source 10, the presence or absence of the output voltage V0 of the main power source 2, and the detection of the reset pulse D11 output by the second reset circuit 11. Input detection of the insertion signal D15, input of the on/off information PDS, output of the insertion signal D14c to the first control unit 13, and output of the control signal D14a to the first switch unit 5 for the purpose of controlling the first switching unit 5, The control unit D14b outputs the control signal D14b to the second switch unit 8 for the purpose of controlling the second switch unit 8, and the processing of the second control unit 14 may be lower than the speed of the first control unit 13. Therefore, the operation clock of the second control unit 14 can be lower than the operation clock of the first control unit 13. Since the second control unit 14 is lower in speed than the first control unit 13, the power consumption of the second control unit 14 can be reduced, and the first control unit 13 and the load circuit 12 are in the power-off state. Therefore, only the second control unit 14 is in the operating state. It becomes possible to suppress power consumption more.

Although the fourth to sixth embodiments described above are described as modifications or application examples to the third embodiment, modifications may be added to the first and second embodiments, or the first and second embodiments may be equally applied.

1‧‧‧AC voltage input (AC power input)

2‧‧‧Main power supply

5‧‧‧1st switch

5a‧‧‧Input terminal of the first switch unit 5

5b‧‧‧ Output terminal of the first switch unit 5

5d, 5e‧‧‧ control signal input terminal of the first switch unit 5

6‧‧‧Fixed circuit

6a‧‧‧Input terminal of fixed circuit 6

7‧‧‧Charging type power supply voltage detection circuit

7a‧‧‧ Voltage detection terminal of charging type power supply voltage detecting circuit 7

8‧‧‧2nd switch

8a‧‧‧Input terminal of the second switch unit 8

8b‧‧‧ Output terminal of the second switch unit 8

8d, 8e‧‧‧ control signal input terminal of the second switch unit 8

10‧‧‧Charging power supply

10a‧‧‧Input terminal for rechargeable power supply 10

10b‧‧‧ Output terminal of rechargeable power supply 10

12‧‧‧Load circuit

12m‧‧‧ register

12p‧‧‧Power input terminal of load circuit 12

13‧‧‧1st Control Department

13m‧‧‧ non-volatile memory

13p‧‧‧Power input terminal of the first control unit 13

14‧‧‧2nd Control Department

14p‧‧‧Power input terminal of the second control unit 14

14q‧‧‧Charged type power supply voltage detection input terminal (2nd voltage detection terminal)

14s‧‧‧1st voltage detection terminal (supply voltage detection input terminal)

19‧‧‧Main power supply voltage detection circuit

19a‧‧‧ Voltage detection terminal of main power supply voltage detecting circuit 19

D6‧‧‧ Output signal of fixed circuit 6 (fixed time signal)

D7‧‧‧Charging type power supply voltage detection signal

D13c‧‧‧Control data

D14a‧‧‧1st control signal of the second control unit 14

D14b‧‧‧2nd control signal of the second control unit 14

D19‧‧‧ Output of main power supply voltage detection circuit 19 (main power supply voltage detection signal)

LDS‧‧‧Information (Action Status Information)

PDS‧‧‧通/断信息

V0‧‧‧ output voltage

V1‧‧‧ voltage

V2‧‧‧ output voltage

Claims (18)

A power supply device includes: a first control unit that controls operation of a load circuit; and a first switch unit that supplies power from a main power source to and from the first control unit and the load circuit; and a second switch unit The power supply from the main power source is disconnected, and the charging type power source supplies electric power and charges through the second switch unit without passing through the first switch unit, and the second control unit receives power from the charging type power source. Supplying and controlling the first switch unit and the second switch unit; the charge type power supply voltage detecting circuit detects an output voltage of the charge type power supply, and supplies a charge type power supply voltage detection signal indicating a detection result to the second control unit; The circuit is connected to the main power source without any of the first switch unit and the second switch unit, and when the output voltage of the main power source rises, the first switch unit and the second switch unit are output. a fixed time signal in a conductive state for a certain period of time; and a main power supply voltage detecting circuit that detects the voltage of the main power supply and supplies a display detection result a power supply voltage detection signal to the second control unit; wherein the first control unit supplies on/off information to the load circuit to the second control unit; and the second control unit detects the signal based on the main power supply voltage The on/off information and the charging type power supply voltage detection signal perform control to output a first control signal for causing the first switching unit to be in an on state. And a second control signal for causing the second switch unit to be in an on state; the first control signal and the fixed time signal for causing the first switch unit to be in a constant state to be input to the first switch unit, When at least one of the first control signal and the fixed time signal indicates an on state, the first switch unit is in an on state; and the second control signal and the fixed time for causing the second switch unit to be in a constant state for a predetermined period of time When the signal is input to the second switch unit, and at least one of the second control signal and the fixed time signal indicates an ON state, the second switch unit is in an ON state. The power supply device according to claim 1, wherein the second control unit inputs a manually generated insertion signal, and the second control unit is not only the main power supply voltage detection signal but also the on/off. The information and the charging type power supply voltage detection signal are also in accordance with the state of the insertion signal; and the control is performed to output whether the first control signal for turning on the first switching portion is turned on, and the second switching portion is turned on. The above second control signal in the state. The power supply device according to claim 2, wherein the second control unit prioritizes another process, and determines whether the main power supply voltage detection signal indicates that the main power supply voltage is equal to or greater than a predetermined threshold value; When the voltage detection signal indicates that the main power supply voltage is less than the predetermined threshold value, the first switch unit and the second switch unit are fixed to the disconnection state, and the insertion processing of the insertion signal by the second control unit is prohibited. A power supply device includes: a first control unit that controls operation of a load circuit; a first switch unit that supplies power from a main power source to the first control unit and the load, and a second switch unit that turns on and off The main power source supplies electric power. The main power source does not pass through the first switch unit, and the electric power is supplied and charged by the second switch unit. The second control unit receives power supply from the charging type power source, and controls the above. The first switch unit and the second switch unit are connected to the main power source without any of the first switch unit and the second switch unit, and output the output voltage of the main power source for output. a signal for causing the first switch unit to be in a constant state; the second fixed circuit is connected to the main power source without any of the first switch unit and the second switch unit, and an output voltage of the main power source is increased. And outputting a signal for causing the second switch unit to be in a constant state for a predetermined period of time; the first reset circuit is connected to the main power source via the first switch unit, and the main power source is output When the output voltage rises, a reset pulse is generated and supplied to the first control unit to initialize the first control unit, and the second reset circuit does not pass through any of the first switch unit and the second switch unit. When the output voltage of the main power source rises, the reset pulse is generated and supplied to the second control unit, and the second control unit outputs the second control unit according to the second reset circuit. The reset pulse is initialized to start the operation, and after the initialization is completed, a first control signal for turning the first switch portion into an on state and a second control signal for turning the second switch portion into an on state are output; a control signal and a signal output from the first fixed circuit for causing the first switch unit to be in a constant state to be input to the first switch unit, at least the first control signal or a signal output from the first fixed circuit When the ON state is indicated, the first switch unit is turned on, and the second control signal and a signal output from the second fixed circuit for turning the second switch unit into a constant state are input to the second switch. When at least the second control signal or the signal output from the second fixed circuit indicates an on state, the second switch unit is turned on. The power supply device according to claim 4, wherein the first fixed circuit outputs a duration of a signal for turning the first switch unit into an on state, and outputs the signal from the second fixed circuit. The duration of the signal for causing the second switch unit to be in an on state is longer than the duration of the reset pulse output by the second reset circuit. The power supply device according to claim 4, wherein the second control unit is configured to be from the first fixed circuit and the first initialization circuit based on a reset pulse generated by the second reset circuit. The second fixed circuit continues to output a signal for turning on the first switch unit and the second switch unit, and the first control unit supplies the load circuit after the initialization of the first control unit is completed. Turning on/off information to the second control unit; the second control unit is after the initialization of the second control unit is completed The first control unit outputs the first and second control signals for turning on the first switch unit and the switch unit when the on/off information is supplied, and the second control unit receives the on/off information. At the time of supply, the first switch unit is controlled based on the on/off information, and the on/off information indicates whether the load circuit is energized when the supply of power to the load circuit is stopped before the initialization of the first control unit. . The power supply device according to claim 6, wherein the second control unit controls the first switch unit in accordance with the control of the first switch unit of the on/off information to correspond to the communication. / The status of the status of the broken information display. The power supply device according to claim 6, wherein the second control unit receives the supply of the on/off information from the first control unit, and then inserts a signal inserted into the second control unit according to an operation input. The control of the first switch unit is performed. The power supply device according to claim 6, wherein the second control unit receives the supply of the on/off information from the first control unit, and controls the first according to an output voltage of the charging type power supply. 2 switch section. The power supply device according to claim 9, wherein the second control unit detects an output voltage of the main power source, and performs control of the first switch unit and the second switch unit based on a detection result. The power supply device of claim 10, wherein the above When the output voltage of the main power source is lower than a predetermined threshold value, the second control unit stops outputting the first and second control signals for turning on the first switch unit and the second switch unit. . The power supply device according to claim 11, wherein the control of the second control unit controls the first switch unit and the second switch unit based on an output voltage of the main power source. The processing for controlling the first switching unit based on the above-described on/off information is prioritized. The processing for controlling the first switching unit based on the on/off information is preferentially executed in response to the control of the second switching unit based on the output voltage of the charging type power supply. The power supply device according to any one of claims 9 to 12, wherein the second control unit is configured to perform an output voltage from the main power source to the first switch unit and the second switch. The process of the part control and the process of controlling the first switch unit based on the above-described on/off information do not perform the insertion process according to the operation input. The power supply device according to any one of claims 1 to 10, wherein the second control unit does not perform the operation input based when the output voltage of the main power source is lower than a predetermined threshold value. Insertion processing. The power supply device according to any one of claims 1 to 10, further comprising: an indication element connected to an output voltage of the charging type power supply; wherein the second control unit is configured as the main power source When the output voltage becomes lower than a predetermined threshold, it starts to light or flash the above indicator components. control. The power supply device according to any one of claims 4 to 10, wherein the second control unit shifts the second control unit when an output voltage of the main power source is lower than a predetermined threshold value Go to sleep mode. The power supply device according to any one of claims 1 to 10, wherein an operation clock of the second control unit is lower than an operation clock of the first control unit. An image display device comprising: the power supply device according to any one of claims 1 to 10; and the load circuit; wherein the load circuit performs a process for displaying an image.