JP5032709B2 - Power supply control device and power supply control method - Google Patents

Description

  Embodiments described herein relate generally to a power supply control device and a power supply control method for controlling supply of power from a power supply to reduce power consumption.

  In recent years, electronic devices having an operation state in which almost all functional units of the device operate and a standby state in which only limited functional units operate have become widespread. In general, control is performed so that power is supplied to a function unit that operates in an operating state and power is not supplied to a function unit that does not operate in a standby state. In addition, whether or not electric power is supplied is often controlled by switching on or off a contact point of a relay arranged in the electric power supply path.

  For example, according to Patent Document 1, a method of using a capacitor charged during normal operation as a power supply in a standby state is disclosed. In this method, when the terminal voltage of the capacitor decreases in the standby state, the relay contact that cuts off the power supplied to the main operating unit returns and charges the capacitor, thereby saving standby power.

  In a relay having a mechanical switching structure with respect to opening and closing of contacts, it is common that the number of usable switching operations is limited. That is, there is a need for a control method that takes into account the number of times that the relay contact opening / closing switching operation is used for switching between the operation state and the standby state of the device.

  According to patent document 2, the structure which considered the lifetime of the mechanical relay is disclosed by providing a semiconductor relay with a mechanical relay.

Japanese Patent Laying-Open No. 2004-274897 (paragraph 0012 in FIG. 1) JP 2009-015649 A (paragraph 0025 in FIG. 5)

  However, in Patent Document 1, when the terminal voltage of the capacitor serving as the power supply in the standby state decreases in a short time, disconnection and connection of the relay contacts may frequently occur in a short time. Therefore, according to this method, the number of switching operations of the relay contacts has reached the endurance in a short period of time, and it has not been possible to secure a longer service life of the open / close components used for cutting off the power supply.

  Moreover, in patent document 2, the mechanical relay and the semiconductor relay were provided in the path which supplies electric power to the block which does not operate | move in a power saving mode. That is, in the method of Patent Document 2, the functional block that operates in the power saving mode constantly receives power from the commercial power source. Therefore, it is difficult to further reduce the power consumption, no matter how the configuration takes into account the life of the mechanical relay.

In other words, conventionally, it has been impossible to achieve power saving and to ensure a longer service life of the opening / closing component used to cut off the power supply.
Therefore, in order to solve the above-described problems, the embodiment of the present invention realizes power saving and a power control device and power control that can ensure a longer useful life of an open / close component used to cut off power supply It aims to provide a method.

According to the embodiment of the present invention, the first power source capable of switching on / off of the power supply and the power of the first power source are charged when the power supply of the first power source is on. And a second power source that supplies the charged power when the power supply of the first power source is off, and a control unit that switches on / off of the power supply of the first power source , Monitoring that operates with the power of the second power supply when the power supply of the first power supply is off, and determines the amount of power from the second power supply by monitoring the state of the second power supply comprising means, and said control means, the supply of the first power source of the power is turned on by a predetermined factor, until required to turn on the supply from the time switched off before the oN When the first elapsed time is shorter than the first predetermined time, the first Also allowed to continue the ON state of the supply power of the power supply as receiving a request to turn off, further, the control means, as the predetermined factor, of monitoring by said monitoring means that said second If the amount of power supply is determined to be lower than a predetermined amount, and controls to switch oN the supply of the first power source of the power, to provide a power control device.

According to the embodiment of the present invention, the step of switching on / off the supply of power from the first power source and the power of the first power source when the power supply of the first power source is on. Charging a second power supply and supplying the charged power from the second power supply when the power supply of the first power supply is off; and the power supply of the first power supply is off The monitoring means operating with the power of the second power source monitors the state of the second power source to determine the amount of power from the second power source, and In the step of switching on / off, the first elapsed time from when the power supply of the first power source is turned on by a predetermined factor and when the power supply is requested to be turned on from the time when the power supply is turned off before the on is turned on. Is shorter than a first predetermined time, the first Also allowed to continue the ON state of the supply power of the power supply as receiving a request to turn off, further, the step of switching the ON / OFF, as the predetermined factor, in determining the amount of power As a result of monitoring by the monitoring means, when it is determined that the amount of power of the second power source is lower than a predetermined amount, control is performed to turn on the power supply of the first power source. providing the power control method.

  According to the embodiments of the present invention, it is possible to provide a power supply control device and a power supply control method capable of realizing power saving and ensuring a longer useful life of an open / close component used for cutting off power supply. .

The block diagram which shows the structure of the television receiver which is a power supply control apparatus which concerns on embodiment of this invention. The system block diagram by each block which performs the power supply control process which concerns on this embodiment. The flowchart for demonstrating the one part operation | movement of a power supply control process performed after switching power supply switches on. The flowchart for demonstrating the one part operation | movement of a power supply control process performed before a switching power supply switches off. The time chart for demonstrating a mode that the operation | movement according to the flowchart shown to FIG. The flowchart for demonstrating the modification of the one part operation | movement of a power supply control process performed after a switching power supply switches on.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a television receiver 10 which is a power supply control device according to an embodiment of the present invention. The television receiver 10 as the power control device executes control related to on / off of power supply to a plurality of blocks provided in the television receiver 10 itself.

  The television receiver 10 according to the present embodiment includes a broadcast wave processing unit 20, an external device IF unit 21, an operation unit 31, a signal processing control unit 40, a display 51, a speaker 52, a storage unit 61, a power supply unit 100, and a power supply. It is comprised by the control part 110 grade | etc.,. An antenna 98 is connected to the broadcast wave processing unit 20. The power supply unit 100 is connected to a plug 97 connected to a home outlet or the like. The power control unit 110 exchanges information with the operation device 99. The operation device 99 is a device for performing a remote operation such as a remote controller using infrared rays or a wireless communication device. The operating device 99 includes a power key (not shown) for switching on / off the power of the television receiver 10.

  The television receiver 10 receives an external power source supplied from a home outlet or the like via a plug 97. The television receiver 10 generates a plurality of power supplies by performing a predetermined conversion process on the external power supply so as to be a power supply for a plurality of blocks provided in the television receiver 10 itself. Among the plurality of generated power supplies, for example, there is a power supply that can be switched on / off by an operation of a user of the television receiver 10. In the following description, a power source that can be switched on / off among a plurality of power sources generated by the power source unit 100 is referred to as a switching power source. Of the plurality of generated power supplies, the power supplied to a specific block when the power of the television receiver 10 is off is referred to as an off-time power supply in the following description.

  As will be described in detail later, the power supply unit 100 uses a relay, which is an open / close component that opens and closes a power supply path, in order to switch on / off the supply of switching power. In general, the number of times that the relay can be opened and closed is limited. In other words, when the switching power supply is frequently switched on / off, the number of times of switching the relay is reached in a short period of time and reaches a predetermined useful life. For this reason, in this embodiment, the control which avoids that a switching power supply switches frequently especially from the state in which the power supply of the television receiver 10 is OFF is implement | achieved.

  The power supply unit 100 performs a predetermined conversion process on the external power supply supplied via the plug 97 to generate a plurality of power supplies including a switching power supply and an off-time power supply. The power supply unit 100 executes the above-described power supply switching process for switching on / off the supply of switching power based on the control by the power supply control unit 110. Then, the switching power generated by the power supply unit 100 is supplied to a plurality of blocks including the signal processing control unit 40. Further, the off-time power generated by the power supply unit 100 is supplied to the power supply control unit 110.

  The power control unit 110 outputs operation information corresponding to the signal input from the operation device 99 to the signal processing control unit 40. In addition, the power control unit 110 transmits and receives information related to the power source switching process by the power source unit 100 to and from the signal processing control unit 40. The power supply control unit 110 outputs control information for the power supply unit 100 to execute power supply switching processing to the power supply unit 100 based on the signal input from the operation device 99 and the information received from the signal processing control unit 40. . The power supply control unit 110 operates with power from an off-time power supply among a plurality of power supplies generated by the power supply unit 100. Further, the power control unit 110 monitors the state of the off-time power supplied from the power unit 100.

  In this way, the power supply unit 100 that has received the external power supply generates a plurality of power supplies including a switching power supply and an off-time power supply. The power control unit 110 that operates with power from the off-time power source controls the power source unit 100 to control on / off of the switching power supply. The power control unit 110 also monitors the state of the off-time power source, which is the power source of the power control unit 110 itself. That is, an operation for controlling on / off of the switching power supply by the power supply unit 100 is executed according to the state of the off-time power supply monitored by the power supply control unit 110, which is a feature of the embodiment of the present invention.

Most blocks described below operate with power from a switching power supply among a plurality of power supplies generated by the power supply unit 100.
The broadcast wave processing unit 20 includes a tuner and a demodulator corresponding to a digital broadcast wave or an analog broadcast wave received from the antenna 98 by the ground or satellite. The broadcast wave processing unit 20 receives a reception signal received by the antenna 98, and performs a channel selection process and a demodulation process for a specific channel on the reception signal. Then, the broadcast wave processing unit 20 outputs a transport stream signal (hereinafter referred to as a TS signal) including information such as video / audio information of the program obtained by performing these processes to the signal processing control unit 40. To do.

  The external device IF unit 21 includes an information extraction unit that extracts information based on various standards such as the HDMI (registered trademark) standard, the USB standard, or the IEEE 1394 standard. The external device IF unit 21 uses a signal processing control unit 40 to extract a TS signal extracted from information received from a recording medium such as an external device connected via a connection terminal conforming to these standards, an external HDD, or a memory card. Output to. Information from the connected external device or storage medium includes information such as video / audio information of the content. The external device IF unit 21 may receive an analog video / audio signal from a connected external device. The external device IF unit 21 performs A / D conversion on the input analog video / audio signal, and outputs the converted digital video / audio signal to the signal processing control unit 40.

  The operation unit 31 has operation keys and outputs operation information corresponding to the operation keys to the signal processing control unit 40. The operation unit 31 has a plurality of operation keys including a power key (not shown) for turning on / off the power of the television receiver 10.

  The signal processing control unit 40 executes a plurality of processes using each block provided in the signal processing control unit 40 itself and each block connected to the signal processing control unit 40. For example, when the signal processing control unit 40 receives operation information indicating that the power is turned on / off from the operation device 99 via the operation unit 31 or the power supply control unit 110, the signal processing control unit 40 stores the information associated with the power on / off. And reading out from the storage unit 61. Further, the signal processing control unit 40 performs predetermined processing on the TS signal input from the selected input source, outputs a video signal to the display 51 and outputs an audio signal to the speaker 52.

  In the present embodiment, the signal processing control unit 40 operates with a switching power supply supplied from the power supply unit 100. When the signal processing control unit 40 receives information for switching off the supply of switching power from the power control unit 110, the signal processing control unit 40 performs a predetermined process. For example, this process is a process of storing information to be stored in the storage unit 61 and a process of transmitting to the power supply control unit 110 information indicating that the switching power supply is allowed to be switched off. Furthermore, the signal processing control unit 40 executes a predetermined process when the switching power supply is started by switching from OFF to ON. For example, this process is a process of confirming the condition that triggered the activation with the power supply control unit 110.

  The display 51 is a display module including a display panel that displays a video signal input from the signal processing control unit 40. A thin flat display such as an LCD (Liquid Crystal Display) or a PDP (Plasma Display Panel) can be applied to the display 51, for example.

  The speaker 52 outputs the audio signal input from the signal processing control unit 40. As the speakers 52, two for the left and right channels, and further, a subwoofer for outputting the low frequency range of the input audio signal may be provided.

  The storage unit 61 is a non-volatile memory that can store information even when power is not supplied. The storage unit 61 stores information requested from the signal processing control unit 40 and reads the stored information from the signal processing control unit 40. In the present embodiment, the storage unit 61 stores, for example, information indicating the time when a specific process is executed. The storage unit 61 may be a drive device such as an HDD or an SSD. Further, when the storage unit 61 is a drive device, it may be connected to the outside of the television receiver 10.

  In addition to the plurality of blocks described above, the television receiver 10 may include a block (not shown) that implements a network communication function including a communication processing unit that performs communication via a network such as a LAN or a WAN. . This block receives information such as video / audio information of content from an information providing source such as a specific server or a recording medium connected to the network, and outputs a TS signal based on this information to the signal processing control unit 40.

  Furthermore, the television receiver 10 may include an ODD (Optical Disc Drive) (not shown) for reading information from the optical disc or writing information to the optical disc. The ODD reads information such as video / audio information of content from the optical disc and outputs a TS signal based on this information to the signal processing control unit 40.

  The present embodiment is an embodiment in which the television receiver 10 is taken as an example of a power supply control device to which the configuration according to the present invention is applied. However, the configuration according to the present embodiment may be an embodiment applied to devices such as a personal computer, a portable mobile terminal device, an HDD / optical disk recorder, and a set top box. Furthermore, the configuration according to the present invention may be applied to an electronic device including a power adapter for supplying predetermined power to various electronic devices.

  With such a configuration, the plurality of blocks provided in the television receiver 10 according to the embodiment of the present invention execute a plurality of processes. In particular, the power supply unit 100 switches on / off the supply of switching power to be a power source for almost all the blocks of the television receiver 10 based on control by the power supply control unit 110. The power control unit 110 also monitors the state of the off-time power supplied from the power unit 100. That is, the television receiver 10 according to the embodiment of the present invention executes a power supply control process for controlling on / off of the switching power supply according to the state of the off-time power supply. Therefore, it is possible to avoid frequent switching of the switching power supply from the state in which the power of the television receiver 10 is off. A plurality of processes related to power control are mainly executed by the power control unit 110 and the signal processing control unit 40 in a composite manner with respect to the supply of a plurality of power sources generated by the power source unit 100.

  Next, with reference to FIG. 2, each block that is provided in the power supply unit 100, the power supply control unit 110, and the signal processing control unit 40 described in FIG.

FIG. 2 is a system configuration diagram of each block that executes power supply control processing according to the present embodiment.
As described above, in this power supply control process, the power supply control unit 110 and the signal processing control unit 40 control the on / off switching of the switching power supply by the power supply unit 100 according to the state of the off-time power supply. . That is, the power control process is executed based on the result of the power control unit 110 monitoring the state of the off-time power.

  The power supply unit 100 includes a relay 201, a power supply conversion unit 202, a charge control unit 203, and a storage power supply unit 204. The power supply control unit 110 includes a signal reception unit 211, a signal identification unit 212, a relay control unit 213, a monitoring unit 214, and a communication unit 215. Further, the signal processing control unit 40 includes a time acquisition unit 221, a state management unit 222, and a communication unit 223.

First, each block provided in the power supply unit 100 will be described in detail.
The relay 201 is an open / close component having a contact for opening and closing a power supply path between the plug 97 and the power conversion unit 202. Relay 201 opens and closes a contact based on a control signal input from relay control unit 213 provided in power supply control unit 110. The relay 201 is preferably provided in a location near the plug 97 with respect to the power conversion unit 202 in the power supply path. In addition, the service life of the switching operation of the relay 201 is finite. In the power supply control process according to the present embodiment, control is performed so that the switching operation of the relay 201 is not frequently performed.

  The power conversion unit 202 performs a voltage conversion process such as AC / DC conversion or DC / DC conversion on an external power supply that is supplied when the contact of the relay 201 is closed to generate a power supply having a predetermined voltage value. The generated power supply having a predetermined voltage value is a switching power supply that can be turned on / off by opening / closing the contact of the relay 201. Then, the power conversion unit 202 supplies the generated switching power to each block of the television receiver 10 including the charge control unit 203 and the signal processing control unit 40.

  When the supply of the switching power supply is switched on, the charging control unit 203 executes a charging process for charging the storage power supply unit 204 with the power of the switching power supply supplied from the power conversion unit 202. When the supply power supply is switched off, the charging control unit 203 does not perform the charging process because power for charging is not supplied. In addition, the charging control unit 203 stops the execution of the charging process when the power storage unit 204 is charged a predetermined amount or more even when the switching power supply is switched on.

  The storage power source unit 204 is a charging power source that is charged with the power of the switching power source by a charging process executed by the charging control unit 203 when the switching power source is switched on. Even when the switching power supply is turned on, the storage power supply unit 204 operates so as to supply the switching power to each block of the power supply control unit 110 because it is no longer charged when charged more than a predetermined amount. Further, when the switching power supply is switched off, the storage power supply unit 204 serves as a power source for each block of the power supply control unit 110 and discharges the charged power to each block. An electric double layer capacitor or the like can be applied to the power storage unit 204.

  In this way, the power supply unit 100 includes the storage power supply unit 204, but the amount of power that the storage power supply unit 204 can supply to each block of the power supply control unit 110 when the switching power supply is off is limited. When the amount of power of the storage power supply unit 204 decreases, in order to increase the power stored in the storage power supply unit 204, it is necessary to switch on the supply of the switching power supply.

Next, each block provided in the power supply control unit 110 will be described.
The signal reception unit 211 receives a signal including information for operating the television receiver 10 from the operation device 99 and outputs information obtained by performing predetermined processing on the received signal to the signal identification unit 212. For example, when the operating device 99 is an infrared remote controller, the signal receiving unit 211 photoelectrically converts an infrared signal transmitted from the operating device 99 and outputs the converted information to the signal identifying unit 212. The signal reception unit 211 may transmit a signal including information indicating the operation state of the television receiver 10 received by the communication unit 215 from the communication unit 223 included in the signal processing control unit 40 to the operation device 99. .

  The signal identification unit 212 identifies information input from the signal reception unit 211 and refers to the control state of the relay control unit 213 with respect to the relay 201 as necessary. The control state indicates whether the relay control unit 213 is controlling to switch the contact of the relay 201 to closed or open. Then, the signal identification unit 212 outputs operation information corresponding to the identification result and the reference result to the relay control unit 213 or the signal processing control unit 40. Of the operation information, information output to the relay control unit 213 serves as switching information for causing the relay 201 to perform an opening / closing switching operation.

  The relay control unit 213 outputs a control signal for switching on / off switching power supply to the relay 201 based on switching information input from the signal identification unit 212 and the communication unit 215. Further, the relay control unit 213 responds with a control state for the relay 201 in response to the reference from the signal identification unit 212. Further, the relay control unit 213 outputs a control signal for switching the contact to be closed (turning on the switching power supply) to the relay 201 according to the monitoring result of the off-time power supply notified from the monitoring unit 214. The relay control unit 213 manages the trigger and control state of the output control information as control status information. The control information trigger is information indicating which control information is output based on what information from which block. When output of control status information is requested from the communication unit 215, the relay control unit 213 outputs control status information to the communication unit 215.

  The monitoring unit 214 monitors the state of the off-time power supply and notifies the relay control unit 213 of information indicating the monitoring result. The monitoring unit 214 monitors an actual on / off state at a predetermined cycle based on a clock signal from a block (not shown) that generates a clock signal having a predetermined frequency. For example, the monitoring unit 214 monitors the voltage value of the power supply when off, and detects that the monitored voltage value is equal to or less than a predetermined value. This monitoring is realized by determining a digital value obtained by A / D-converting the voltage value of the power supply at the time of OFF through an electronic circuit using a resistor, a diode, a transistor, or the like. Monitoring by the monitoring unit 214 is preferably started after a predetermined time has elapsed since the relay control unit 213 outputs a control signal for switching off the supply of switching power to the relay 201.

  The communication unit 215 transmits / receives information to / from the communication unit 223 included in the signal processing control unit 40. When the communication unit 215 receives information indicating that the switching power supply is allowed to be switched off, the communication unit 215 outputs switching information corresponding to this information to the relay control unit 213. In addition, when the communication unit 223 requests output of information related to control status information from the communication unit 223, the communication unit 215 requests the relay control unit 213 to output control status information. Further, the communication unit 215 transmits the control status information input from the relay control unit 213 to the communication unit 223.

  Thus, since the power supply control part 110 monitors the state of the power supply at the time of OFF, it can grasp | ascertain that the electric energy which the storage power supply part 204 can supply has decreased. At this time, the power supply control unit 110 can increase the amount of power that can be supplied by the storage power supply unit 204 by controlling the power supply unit 100 to turn on the supply of the switching power supply. For example, when the signal receiving unit 211 is configured to receive a signal from an infrared remote controller serving as the operating device 99, if the signal receiving unit 211 receives sunlight, unnecessary photoelectric conversion is performed and current consumption increases. In such a state, there is a possibility that switching power supply on / off may be switched in a short time for charging the power storage unit 204, and the number of switching operations of the relay 201 is greatly increased. It will be. And the period until the frequency | count of opening / closing switching operation | movement of the relay 201 reaches the service life becomes short, and the service life of the relay 201 becomes short. However, it is possible to avoid a reduction in the service life of the relay 201 by the power control process executed by the power control unit 110 described above and the signal processing control unit 40 described below.

Next, each block provided in the signal processing control unit 40 will be described.
The time acquisition unit 221 acquires information indicating the current time at a predetermined cycle from a timed block (not shown), and outputs the acquired information to the state management unit 222. This clocking block (not shown) can be realized by receiving a signal related to the radio timepiece and clocking based on the received signal. A block (not shown) for timing may be counted based on information included in the PSI / SI information extracted from the TS signal input from the broadcast wave processing unit 20. The time acquisition unit 221 may output information indicating the current time to the state management unit 222 when requested by the state management unit 222.

  The state management unit 222 acquires control status information managed by the relay control unit 213 of the power supply control unit 110 via the communication unit 223. Further, the state management unit 222 outputs information indicating that the switching power supply is allowed to be switched off via the communication unit 223. Further, the state management unit 222 acquires information indicating the current time from the time acquisition unit 221. In addition, the state management unit 222 reads information indicating the time at which the specific event is processed from the storage unit 61 and causes the storage unit 61 to store the time at the time when the predetermined process is executed. The state management unit 222 determines a process to be executed next based on information obtained from the communication unit 223, the time acquisition unit 221, and the storage unit 61. Further, the state management unit 222 manages whether or not it should be avoided to turn off the switching power supply based on the information obtained from each block. When the state management unit 222 receives information indicating that the switching power supply is to be turned off via the communication unit 223, the state management unit 222 stores information to be stored in the storage unit 61.

  The communication unit 223 transmits and receives information to and from the communication unit 215 and the signal identification unit 212 provided in the power supply control unit 110. The communication unit 223 receives operation information, information indicating that the switching power supply is to be turned off, and the like from the signal identification unit 212. In addition, control status information managed by the relay control unit 213, information indicating that the switching power supply is permitted to be turned off, and the like are transmitted to and received from the communication unit 215. The communication unit 223 outputs specific information among the information received from the communication unit 215 and the signal identification unit 212 to the state management unit 222. The communication unit 223 requests the communication unit 215 to output information requested from the state management unit 222.

  With such a system configuration, the power supply control unit 110 and the signal processing control unit 40 execute power supply control processing for controlling on / off switching of switching power supply by the power supply unit 100 according to the state of the off-time power supply. To do. In this processing, the signal processing control unit 40 performs predetermined processing after the switching power supply is turned on and before it is turned off based on the control status information managed by the power supply control unit 110. In addition, the signal processing control unit 40 manages whether or not it should be avoided to turn off the switching power supply. Therefore, the television receiver 10 according to the present embodiment can realize power saving and can ensure a longer service life of the opening / closing component used to cut off the power supply.

  Next, referring to FIG. 3, the power supply control process executed after the switching power supply is turned on by the blocks included in the power supply unit 100, the power supply control unit 110, and the signal processing control unit 40 described in FIG. 2. A part of the operation will be described.

FIG. 3 is a flowchart for explaining a partial operation of the power supply control process executed after the switching power supply is turned on.
This operation is executed when the signal processing control unit 40 is activated by switching on the switching power supply.
First, the state management unit 222 provided in the signal processing control unit 40 acquires control status information managed by the relay control unit 213 provided in the power supply control unit 110 via the communication unit 223 (S301). The state management unit 222 determines the trigger that has output the control information based on the acquired control status information (S302). In this trigger, the switching power source is turned on according to a power key (not shown) provided in the operation unit 31, the switching power source is turned on according to a power key (not shown) provided in the operating device 99, and the monitoring result of the monitoring unit 214 is A plurality of triggers including turning on the corresponding switching power supply are defined.

  When the determination result of the trigger is not on of the switching power supply according to the monitoring result of the monitoring unit 214 (No in S302), the process ends. On the other hand, when the determination result of the trigger is that the switching power supply is turned on according to the monitoring result of the monitoring unit 214 (Yes in S302), the state management unit 222 acquires information indicating the current time from the time acquisition unit 221 ( S303). Here, the acquired current time is defined as (A). Further, the state management unit 222 reads the previous relay-off execution time from the storage unit 61 (S304). For example, the relay off execution time is the time when the state management unit 222 outputs information indicating that the switching power supply is allowed to be switched off to the communication unit 223. Here, the relay-off execution time immediately before being read is defined as (B). Further, the state management unit 222 calculates a relay-off time (A−B) that is a time difference between the acquired current time (A) and the relay-off execution time (B) immediately before being read out, and compares it with a predetermined time Toff (S305). ).

  If the comparison result between the relay off time (AB) and the predetermined time Toff is not shorter than the relay off time (AB) (No in S305), the process ends. On the other hand, if the comparison result between the relay off time (AB) and the predetermined time Toff is shorter than the relay off time (AB) (Yes in S305), the state management unit 222 turns on the relay off avoidance mode and manages the state. (S306). The relay-off avoidance mode indicates a state (mode) in which it is necessary to avoid turning off the switching power supply. In other words, when the relay-off avoidance mode is managed as on, turning off the supply of switching power is to be avoided (turned on). Further, when the state management unit 222 starts the state management with the relay-off avoidance mode turned on, the state management unit 222 acquires information indicating the time at this time from the time acquisition unit 221 and stores the acquired information in the storage unit 61 (S307). ). The process is then complete.

  In other words, when the trigger for switching on the switching power supply is in accordance with the monitoring result of the monitoring unit 214 and when the relay off time is shorter than the predetermined time, the switching power supply should be turned on. It becomes a state. In other words, when the discharge time of the power storage unit 204 is shorter than the predetermined time, it is determined that the current consumption of the power control unit 110 is higher than the normal state. It is determined that it is necessary to continue charging the power. Therefore, the television receiver 10 according to the present embodiment can keep the power of the off-time power supply at a predetermined amount or more.

  Next, referring to FIG. 4, the power supply control process executed before the switching power supply is turned off by the blocks included in the power supply unit 100, the power supply control unit 110, and the signal processing control unit 40 described in FIG. 2. A part of the operation will be described.

FIG. 4 is a flowchart for explaining a part of the operation of the power supply control process executed before the switching power supply is turned off.
This operation is performed after the state management unit 222 receives information indicating that the switching power supply is turned off from the power supply control unit 110 via the communication unit 223.
First, the state management unit 222 determines whether the currently managed state is a state in which the relay-off avoidance mode is on (S401). When the state is not the state in which the relay-off avoidance mode is on (No in S401), the state management unit 222 outputs information indicating that the switching power supply is allowed to be switched off via the communication unit 223. Receiving this information via the communication unit 215, the relay control unit 213 outputs control information for turning off the relay 201 (turning off the supply of switching power) to the relay 201 (S406).

  On the other hand, when the managed state is the state in which the relay-off avoidance mode is on (Yes in S401), the state management unit 222 acquires information indicating the current time from the time acquisition unit 221 (S402). Here, the acquired current time is defined as (X). Further, the state management unit 222 reads from the storage unit 61 the time when the immediately preceding relay-off avoidance mode is turned on and the state management is started (S403). Here, the relay off avoidance mode start time immediately before being read is defined as (Y). Further, the state management unit 222 calculates a relay-off avoidance mode on-time (XY) that is a time difference between the acquired current time (X) and the relay-off avoidance mode start time (Y) immediately before being read out, and calculates the predetermined time Tam. (S404).

  If the comparison result between the relay-off avoidance mode on time (XY) and the predetermined time Tam is not longer than the relay-off avoidance mode on time (XY) (No in S404), the process ends. On the other hand, when the comparison result between the relay off avoidance mode on time (XY) and the predetermined time Tam is longer than the relay off avoidance mode on time (XY) (Yes in S404), the state management unit 222 avoids the relay off avoidance. The state is managed with the mode off (S405). Further, the state management unit 222 outputs information indicating that the switching power supply is allowed to be switched off via the communication unit 223. Then, the relay control unit 213 outputs control information for turning off the relay 201 (turning off the switching power supply) to the relay 201 (S406). The state management unit 222 acquires information indicating the time at this time from the time acquisition unit 221 at the time when the information indicating that the switching power supply is permitted to be switched off is output to the communication unit 223. The stored information is stored in the storage unit 61 (S407). The process is then complete.

  That is, when the signal processing control unit 40 is requested to turn off the switching power supply, the power control state is managed as a state where the switching power supply should be turned on (relay off avoidance mode on). In addition, when the relay-off avoidance mode on-time is longer than the predetermined time, the switching power supply is kept on. In other words, when it is determined that the storage power source unit 204 needs to be charged with power and the switching power source is requested to be turned off, if the charging time to the storage power source unit 204 is short, the charging is sufficiently performed. It is determined that it has not been made, and the switching power supply is kept on. On the other hand, if the charging time to the power storage unit 204 is long, it is determined that the charging is sufficiently performed, and the supply of the switching power supply can be switched off.

  By such control, even when the current consumption of the power supply control unit 110 increases due to some factor, it is avoided that the switching operation of the contact of the relay 201 is frequently performed, and the charging period of the storage power supply unit 204 is increased. In addition, the power of the power storage unit 204 can be maintained at a predetermined amount or more. Therefore, the television receiver 10 according to the present embodiment can realize power saving and can ensure a longer service life of the opening / closing component used to cut off the power supply.

Next, a state in which the operation according to the flowchart shown in FIGS. 3 and 4 is specifically executed will be described with reference to FIG.
FIG. 5 is a time chart for explaining a state in which the operation according to the flowchart shown in FIGS.
At time B1, the relay 201 is opened (turned off) in order to turn off the supply of switching power, so the relay off execution time (B1) is registered.
When it is detected at time A that the voltage value of the off-time power supply has become a predetermined value or less (decreased), the switching power supply is turned on (relay 201 is closed (on)), and the relay off time (A -B1) and the predetermined time Toff are compared. Since relay off time (A-B1) <predetermined time Toff, the relay off avoidance mode is turned on. That is, the time A at this time is the relay off avoidance mode start time (Y).

  At time X1, the switching power supply is turned off (relay 201 is turned off). At this time, the relay-off avoidance mode is on, and the relay-off avoidance mode on time (X1-Y)> predetermined time Tam is not satisfied, so that the switching power supply is kept on.

  At time X2, the switching power supply is turned off again (relay 201 is turned off). At this time, the relay-off avoidance mode is on, and the relay-off avoidance mode on-time (X1-Y)> predetermined time Tam. Therefore, the relay-off avoidance mode is turned off, the switching power supply is controlled to be turned off (relay 201 is opened (off)), and the relay-off execution time (B2) is registered.

  As described above, even when the switching power supply is turned off (relay 201 open (off)), the relay off avoidance mode is on and the relay off avoidance mode on time is not longer than the predetermined time Tam. The power supply is not controlled to be turned off. Therefore, frequent switching operation of the contacts of the relay 201 is avoided. That is, the television receiver 10 according to the present embodiment can realize power saving and ensure a longer service life of the opening / closing component used to cut off the power supply.

(Modification)
Next, a modification of a part of the operation of the power supply control process executed after the switching power supply is turned on, which has been described with reference to FIG. 3, will be described with reference to FIG.
FIG. 6 is a flowchart for explaining a modified example of a part of the operation of the power supply control process executed after the switching power supply is turned on.
This operation is performed when the signal processing control unit 40 is activated by switching on the switching power supply, similarly to the operation according to the flowchart shown in FIG. The procedure of this operation is almost the same as the flowchart shown in FIG. However, the number of times when the comparison result between the relay off time (AB) and the predetermined time Toff is shorter than the relay off time (AB) is counted, and the next processing is branched according to the counted number. It is different. Accordingly, in the following description, this different point will be described in detail, and the description of the substantially same operation will be simplified or omitted.

  The state management unit 222 acquires control status information (S601), and determines a trigger that has output control information based on the acquired control status information (S602). When the determination result of the trigger is not on of the switching power source corresponding to the monitoring result of the monitoring unit 214 (No in S602), the process ends. On the other hand, when the determination result of the trigger is that the switching power supply is turned on according to the monitoring result of the monitoring unit 214 (Yes in S602), the state management unit 222 acquires information indicating the current time (S603), and the storage unit The previous relay-off execution time is read from 61 (S604). Further, the state management unit 222 calculates the relay off time (AB) and compares it with the predetermined time Toff (S605).

  If the relay-off time (AB) is not shorter than the predetermined time Toff (No in S605), the process ends. On the other hand, when the relay-off time (AB) is shorter than the predetermined time Toff (Yes in S605), the state management unit 222 adds one counter value (S606), and whether the counter value after the addition is equal to or greater than the predetermined value. Is determined (S607). If the counter value after addition is not equal to or greater than the predetermined value (No in S607), the process ends. On the other hand, when the counter value after the addition is equal to or greater than the predetermined value (Yes in S607), the state management unit 222 manages the state by turning on the relay-off avoidance mode (S608). In addition, the state management unit 222 acquires information indicating the time when the relay-off avoidance mode is turned on and starts the state management, and stores the acquired information in the storage unit 61 (S609). The process is then complete.

  By such control, when the state where the discharge time of the power storage unit 204 is shorter than the predetermined time is counted a predetermined number of times, it is determined that it is necessary to continue charging the power to the power storage unit 204. That is, when the state where the current consumption of the power supply control unit 110 is increased for some reason is detected a predetermined number of times, frequent switching operation of the contact of the relay 201 is avoided. This means that it is determined that it is necessary to continue charging the power to the power storage unit 204 when the state where the current consumption of the power control unit 110 is increasing continues.

  In addition, it may be an embodiment in which it is determined whether or not the relay-off time (AB) is shorter than the predetermined time Toff has been detected a predetermined number of times within a certain time. According to this embodiment, when the relay-off time (A-B) is shorter than the predetermined time Toff and has not been detected a predetermined number of times within a certain time, the measured counter value can be cleared. . This means that it is determined that there is not much need to continue charging the power to the power storage unit 204 when the state in which the current consumption of the power control unit 110 is increasing occurs intermittently. is doing. In other words, when it is detected that the relay-off time (AB) is shorter than the predetermined time Toff a predetermined number of times within a predetermined time, it is determined that it is necessary to continue charging the power to the power storage unit 204. It means that.

  Therefore, also in such various embodiments, the television receiver 10 according to the present embodiment can be used to keep the power of the power supply at the time of OFF or more at a predetermined amount, realize power saving, and cut off the power supply. It is possible to secure a longer service life of the open / close component.

  As described above, when the switching power supply is turned on, the television receiver 10 according to the present embodiment determines the trigger that outputs the control information for turning on the switching power supply and the relay off time. The television receiver 10 manages the power control state according to the determination result. When the television receiver 10 is requested to turn off the switching power supply, the television receiver 10 determines the current power control state and the time during which the power supply is in a specific power control state, and switches according to the determination result. It is determined whether to turn off the power supply. That is, the television receiver 10 according to the present embodiment avoids frequent switching operation of the contact of the relay 201 even when the current consumption of the power control unit 110 increases, It is possible to secure the charging period and further maintain the power of the storage power supply unit 204 at a predetermined amount or more. Therefore, the television receiver 10 according to the present embodiment can realize power saving and can ensure a longer service life of the opening / closing component used to cut off the power supply.

  The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the scope of the present invention. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some constituent elements may be deleted from all the constituent elements shown in the embodiments, and the constituent elements according to the different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 10 ... Television receiver, 20 ... Broadcast wave process part, 21 ... External apparatus IF part, 31 ... Operation part, 40 ... Signal processing control part, 51 ... Display, 52 ... Speaker, 61 ... Memory | storage part, 100 ... Power supply 110, power supply control unit, 97 ... plug, 98 ... antenna, 99 ... operating device, 201 ... relay, 202 ... power conversion unit, 203 ... charge control unit, 204 ... power storage unit, 211 ... signal receiving unit, 212 ... Signal identification unit, 213 ... relay control unit, 214 ... monitoring unit, 215 ... communication unit, 221 ... time acquisition unit, 222 ... state management unit, 223 ... communication unit.

Claims (7)

A first power source capable of switching on / off of power supply;
A second power supply is charged when the power supply of the first power supply is on, and the charged power is supplied when the power supply of the first power supply is off. Power supply,
Control means for switching on / off the power supply of the first power source ;
When the power supply of the first power source is off, the power source operates with the power of the second power source and determines the amount of power from the second power source by monitoring the state of the second power source. Monitoring means;
Equipped with,
The control means turns on the power supply of the first power source due to a predetermined factor, and the first elapsed time from the time when the power is switched off before the turn-on to the time when the power supply is requested to turn on is the first elapsed time. If shorter than a predetermined time of 1, even if a request to turn off the power supply of the first power supply is received, the supply is kept on,
Furthermore, when the control unit determines that the power amount of the second power source is lower than a predetermined amount as a result of monitoring by the monitoring unit, the control unit power of the first power source controlling to switch the supply of on, power control unit. The control means has an opening / closing mechanism that opens and closes a contact, and switches on / off the power supply of the first power source via the opening / closing mechanism.
The power supply control device according to claim 1. The control means turns on the power supply of the first power supply due to a predetermined factor, and turns off the power supply of the first power supply when the first elapsed time is shorter than the first predetermined time. Even if it receives a request to make it, execute the control mode to continue the supply on state,
Further, the control means turns off the power supply of the first power supply from the time when the power supply of the first power supply is turned on by the predetermined factor in the state in which the control mode is executed. If the second elapsed time until requested is shorter than the second predetermined time, the power supply of the first power supply is kept on, while the second elapsed time is the second predetermined time. If longer than, cancel the control mode and turn off the power supply,
The power supply control device according to claim 1 or 2 . The second predetermined time is the time when the power of the second power source is second from the time when the control unit turns on the power supply of the first power source due to a predetermined factor. It is time to exceed the predetermined amount of
The power supply control device according to claim 3 . The control means executes the control mode after a predetermined number of times that the first elapsed time is shorter than a first predetermined time.
The power supply control device according to claim 3 . The control means executes the control mode after a predetermined number of times within a third predetermined time that the first elapsed time is shorter than the first predetermined time.
The power supply control device according to claim 3 . Switching on / off the supply of power from the first power source;
When the power supply of the first power supply is on, the second power supply is charged with the power of the first power supply, and when the power supply of the first power supply is off, the charged power is Supplying from the second power source ;
When the power supply of the first power source is off, the monitoring means that operates with the power of the second power source monitors the state of the second power source and determines the amount of power from the second power source. A step of judging;
Have,
In the step of switching on / off, the power supply of the first power source is turned on by a predetermined factor, and a first time from when the power is turned off before this on until a request to turn on the first power supply is made. If the elapsed time is shorter than the first predetermined time, even if a request to turn off the power supply of the first power supply is received, the on state of the supply is continued ,
Further, in the step of switching on / off, as a result of monitoring by the monitoring means in the step of determining the power amount, the power amount of the second power source is lower than a predetermined amount as the predetermined factor. If it is determined that performs control to switch on the supply of the first power source of the power, power control method.

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