技术领域technical field
本发明涉及一种电子装置，且特别涉及一种具有完全省电机制的电子装置。The present invention relates to an electronic device, and more particularly to an electronic device with a complete power saving mechanism.
背景技术Background technique
电子装置大多设有相应的电源装置，以提供系统所需的电源，例如：手机与笔记本电脑用的电源配接器(power adapter)以及电脑用的电源供应器(power supplier)。一般而言，电源装置大多需要通过交流转直流转换器(AC/DC converter)或是直流转直流转换器(DC/DC converter)，来产生系统所需的电压。交流转直流转换器是通过电压器与整流稳压电路，将交流电压转换成系统所需的直流电压，因此具有较大的电源损耗。Most electronic devices are equipped with corresponding power supply devices to provide the power required by the system, such as power adapters for mobile phones and notebook computers and power suppliers for computers. Generally speaking, most of the power supply devices need to use an AC/DC converter or a DC/DC converter to generate the voltage required by the system. The AC-to-DC converter converts the AC voltage into the DC voltage required by the system through a voltage converter and a rectification and stabilization circuit, so it has a large power loss.
为了有效利用能源，现有的电源装置大多会提供两种电源-主电源(mainpower)与待机电源(standby power)。当电子装置关机时，电源装置还会持续地提供待机电源，以致使电子装置的内部控制单元可利用检测电源开关被按压的状态，来决定是否进行开机程序。也就是说，当电子装置在关机或等待开机时，电源装置本身还是会有一定的耗电量。例如：当笔记本电脑关机且电池已充饱电的状态下，电源配接器还是会有100～300毫瓦特的耗电量；当目前的平板电脑在关机状态下，平板电脑仍约有20毫瓦特的耗电量。In order to effectively utilize energy, most existing power supply devices provide two kinds of power—main power and standby power. When the electronic device is turned off, the power supply device will continue to provide standby power, so that the internal control unit of the electronic device can determine whether to perform a boot process by detecting the state of the power switch being pressed. That is to say, when the electronic device is shutting down or waiting to be turned on, the power supply itself still consumes a certain amount of power. For example: when the laptop is turned off and the battery is fully charged, the power adapter still consumes 100-300 milliwatts; when the current tablet is turned off, the tablet still consumes about 20 milliwatts. Power consumption in watts.
换言之，现有电子装置在关机或是等待开机的状态下，依旧会产生一定的耗电量，进而造成电源浪费而对环境造成伤害。此外，虽然可利用拔除电源插头的方式来避免电子装置在关机时的耗电量，但是时常插拔电源插头不仅容易造成电源线或是插头接线的毁损，且也容易引发电线走火的风险。另外，对于某些平板式电脑(iPAD Like)而言，这些装置的电源是无法拔除的，其在出厂时，电池可能就至少充电至一半的电力，因此在电源无法拔除的情况下，整个平板式电脑将持续消耗约20毫瓦特的耗电量，如此，在时间超过两三个月的情况下，使用者购买到平板式电脑时，将必须再重新充电，而无法马上使用。In other words, when the existing electronic device is turned off or waiting to be turned on, it still consumes a certain amount of power, which in turn causes waste of power and damages the environment. In addition, although the method of unplugging the power plug can be used to avoid power consumption of the electronic device when it is turned off, frequent plugging and unplugging of the power plug will not only easily cause damage to the power cord or plug wiring, but also easily cause the risk of fire from the wire. In addition, for some tablet computers (iPAD Like), the power supply of these devices cannot be unplugged, and the battery may be charged to at least half of the power when it leaves the factory, so when the power supply cannot be unplugged, the entire tablet A tablet computer will continue to consume about 20 milliwatts of electricity. In this way, when the user buys a tablet computer for more than two or three months, he will have to recharge it again and cannot use it immediately.
发明内容Contents of the invention
本发明提供一种电子装置，在电子装置执行关机时，切断供应至电子装置的电源，以提高系统的省电效能。The invention provides an electronic device, which cuts off the power supplied to the electronic device when the electronic device is shut down, so as to improve the power saving performance of the system.
本发明提出一种电子装置，包括电源开关、开关单元、电源供应单元以及控制单元。电源开关具有第一电源端与第二电源端，且第一电源端用以接收电源。开关单元具有第一连接端与第二连接端，且开关单元的第一连接端与第二连接端并联于电源开关的第一电源端与第二电源端。电源供应单元连接电源开关的第二电源端与开关单元的第二连接端。控制单元连接电源供应单元与开关单元。当第一电源端与第二电源端导通一段预设时间时，电源提供至电源供应单元，且电子装置开机。此外，控制单元控制开关单元导通第一连接端与第二连接端，以致使第一电源端与第二电源端断路后，电源仍经由开关单元提供至电源供应单元。当电子装置关机时，控制单元控制开关单元断路第一连接端与第二连接端。The invention provides an electronic device, which includes a power switch, a switch unit, a power supply unit and a control unit. The power switch has a first power terminal and a second power terminal, and the first power terminal is used for receiving power. The switch unit has a first connection terminal and a second connection terminal, and the first connection terminal and the second connection terminal of the switch unit are connected in parallel to the first power supply terminal and the second power supply terminal of the power switch. The power supply unit is connected to the second power end of the power switch and the second connection end of the switch unit. The control unit is connected to the power supply unit and the switch unit. When the first power terminal and the second power terminal are conducted for a preset period of time, power is supplied to the power supply unit, and the electronic device is turned on. In addition, the control unit controls the switch unit to connect the first connection terminal and the second connection terminal, so that after the first power supply terminal and the second power supply terminal are disconnected, power is still provided to the power supply unit through the switch unit. When the electronic device is turned off, the control unit controls the switch unit to disconnect the first connection terminal and the second connection terminal.
在本发明的一实施例中，上述电源为交流电压，且电源供应单元包括电源配接器与电源电路。电源配接器连接电源开关的第二电源端，并将交流电压转换为直流电压。再者，电源电路连接电源配接器，并将直流电压转换为系统电压。In an embodiment of the present invention, the power source is an AC voltage, and the power supply unit includes a power adapter and a power circuit. The power adapter is connected to the second power terminal of the power switch, and converts the AC voltage into a DC voltage. Furthermore, the power circuit is connected to the power adapter and converts the DC voltage into the system voltage.
在本发明的一实施例中，上述电源为直流电压，且上述电源供应单元包括电源电路。电源电路连接电源开关的第二电源端，并将直流电压转换为系统电压。In an embodiment of the present invention, the power supply is a DC voltage, and the power supply unit includes a power circuit. The power circuit is connected to the second power terminal of the power switch, and converts the DC voltage into the system voltage.
在本发明的一实施例中，上述电子装置还包括电源配接器，连接电源开关的第一电源端，并将交流电压转换成直流电压。In an embodiment of the present invention, the above-mentioned electronic device further includes a power adapter connected to the first power end of the power switch and converting the AC voltage into a DC voltage.
在本发明的一实施例中，上述控制单元包括嵌入式控制器与开关电路。嵌入式控制器在电子装置开机时，将多个状态信号的其一维持在第一电平，并在电子装置关机时，将这些状态信号维持在第二电平。此外，开关电路连接嵌入式控制器。其中，当这些状态信号的其一为第一电平时，开关电路提供具有第二电平的设定信号，以控制开关单元导通第一连接端与第二连接端。当这些状态信号为第二电平时，开关电路提供具有第一电平的设定信号，以控制开关单元断路第一连接端与第二连接端。In an embodiment of the present invention, the control unit includes an embedded controller and a switch circuit. The embedded controller maintains one of the state signals at a first level when the electronic device is turned on, and maintains these state signals at a second level when the electronic device is turned off. In addition, the switching circuit is connected to the embedded controller. Wherein, when one of the status signals is at a first level, the switch circuit provides a setting signal with a second level to control the switch unit to conduct the first connection terminal and the second connection terminal. When the state signals are at the second level, the switch circuit provides a setting signal with the first level to control the switch unit to disconnect the first connection terminal and the second connection terminal.
在本发明的一实施例中，嵌入式控制器在特定事件发生时，使得多个状态信号的其一维持在第一电平。In an embodiment of the present invention, the embedded controller maintains one of the plurality of state signals at a first level when a specific event occurs.
在本发明的一实施例中，多个状态信号包括唤醒控制信号与多个休眠控制信号。In an embodiment of the invention, the plurality of status signals include a wake-up control signal and a plurality of sleep control signals.
在本发明的一实施例中，开关电路包括第一电阻与多个第一开关。第一电阻具有第一端与第二端，第一端接收第一电压，且第二端提供设定信号。这些第一开关连接在第一电阻的第二端与接地端之间，且这些第一开关依据多个状态信号而决定其导通状态。In an embodiment of the invention, the switch circuit includes a first resistor and a plurality of first switches. The first resistor has a first end and a second end, the first end receives the first voltage, and the second end provides a setting signal. The first switches are connected between the second end of the first resistor and the ground end, and the conduction states of the first switches are determined according to a plurality of state signals.
在本发明的一实施例中，上述开关单元包括继电器、控制电路以及第二开关。继电器具有第一连接端与第二连接端。控制电路连接继电器。此外，第二开关分别连接控制电路与控制单元的开关电路。In an embodiment of the present invention, the switch unit includes a relay, a control circuit and a second switch. The relay has a first connection end and a second connection end. The control circuit is connected to the relay. In addition, the second switch is respectively connected to the control circuit and the switch circuit of the control unit.
基于上述，本发明是将开关单元的两连接端与电源开关的两端相互并联，并在电子装置执行关机时，通过开关单元的两连接端的不导通，切断供应至电子装置的电源。如此一来，电子装置在关机状态下将可达到零耗电的效果，进而提高系统的省电效能。Based on the above, the present invention connects the two connecting ends of the switch unit and the two ends of the power switch in parallel, and cuts off the power supply to the electronic device through the non-conduction of the two connecting ends of the switch unit when the electronic device is shut down. In this way, the electronic device can achieve the effect of zero power consumption in the shutdown state, thereby improving the power saving performance of the system.
为让本发明的上述特征和优点能还明显易懂，下文特举实施例，并配合附图作详细说明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.
附图说明Description of drawings
图1为依据本发明的一实施例的电子装置的方框图；FIG. 1 is a block diagram of an electronic device according to an embodiment of the present invention;
图2为依据本发明的另一实施例的电子装置的方框图；2 is a block diagram of an electronic device according to another embodiment of the present invention;
图3为依据本发明的一实施例的开关电路的电路图；3 is a circuit diagram of a switch circuit according to an embodiment of the present invention;
图4为依据本发明的一实施例的开关单元的电路图；4 is a circuit diagram of a switch unit according to an embodiment of the present invention;
图5为依据本发明的又一实施例的电子装置的方框图。FIG. 5 is a block diagram of an electronic device according to yet another embodiment of the invention.
具体实施方式Detailed ways
图1为依据本发明的一实施例的电子装置的方框图。参照图1，电子装置100包括电源开关SW1、电源供应单元110、控制单元120、开关单元130、以及内部电路140。所述电子装置100可例如是平板电脑、台式电脑(desktopcomputer)、笔记本电脑(notebook computer)或是多机一体(all in one)的电脑。FIG. 1 is a block diagram of an electronic device according to an embodiment of the invention. Referring to FIG. 1 , the electronic device 100 includes a power switch SW1 , a power supply unit 110 , a control unit 120 , a switch unit 130 , and an internal circuit 140 . The electronic device 100 can be, for example, a tablet computer, a desktop computer, a notebook computer, or an all-in-one computer.
参照图1，电源开关SW1的第一电源端接收电源PS1，且电源开关SW1的第二电源端连接至电源供应单元110。在操作上，当电源开关SW1被按压时，第一电源端与第二电源端将导通一预设时间(例如：数百毫秒)。此时，电源PS1将被提供至电源供应单元110，且电子装置100开机。此外，电源供应单元110将依据电源PS1提供多个系统电压VS11～VS13，以供开关单元130、控制单元120以及内部电路140使用。Referring to FIG. 1 , a first power terminal of the power switch SW1 receives power PS1 , and a second power terminal of the power switch SW1 is connected to the power supply unit 110 . In operation, when the power switch SW1 is pressed, the first power terminal and the second power terminal will be turned on for a preset time (for example: hundreds of milliseconds). At this time, the power PS1 will be provided to the power supply unit 110, and the electronic device 100 will be turned on. In addition, the power supply unit 110 provides a plurality of system voltages VS11 - VS13 according to the power supply PS1 for use by the switch unit 130 , the control unit 120 and the internal circuit 140 .
还进一步来看，系统电压VS12用以驱动控制单元120，以致使控制单元120进行运作。在本实施例中，控制单元120有可能需花费一段时间才可被系统电压VS12所驱动。因此，为了确保电源供应单元110可以在控制单元120被驱动之前持续地提供系统电压VS12，在本实施例中，在电子装置100开机的初期，开关单元130可以先利用系统电压VS11来导通其第一连接端TM11与第二连接端TM12，以致使电源供应单元110可以持续地接收到电源PS1，进而致使控制单元120可以完整地被驱动。Further, the system voltage VS12 is used to drive the control unit 120 to cause the control unit 120 to operate. In this embodiment, it may take a while for the control unit 120 to be driven by the system voltage VS12. Therefore, in order to ensure that the power supply unit 110 can continuously provide the system voltage VS12 before the control unit 120 is driven, in this embodiment, at the initial stage of starting up the electronic device 100, the switch unit 130 can use the system voltage VS11 to turn it on first. The first connection terminal TM11 and the second connection terminal TM12 enable the power supply unit 110 to receive the power PS1 continuously, so that the control unit 120 can be completely driven.
此外，当控制单元120被驱动后，控制单元120会依据电子装置100的操作模式，而提供断电信号SCT1或是供电信号SON1给开关单元130。举例来说，当电子装置100处在开机/工作状态时，控制单元120将提供一供电信号SON1给开关单元130。此时，开关单元130将依据供电信号SON1导通第一连接端TM11与第二连接端TM12，进而致使电源供应单元110可以持续地接收到电源PS1。换言之，控制单元120会控制开关单元130导通第一连接端TM11与第二连接端TM12，以致使电源开关SW1的第一电源端与第二电源端断路后，电源PS1仍可经由开关单元130提供至电源供应单元110。In addition, when the control unit 120 is driven, the control unit 120 will provide the power-off signal SCT1 or the power supply signal SON1 to the switch unit 130 according to the operation mode of the electronic device 100 . For example, when the electronic device 100 is in the power-on/working state, the control unit 120 will provide a power supply signal SON1 to the switch unit 130 . At this time, the switch unit 130 will connect the first connection terminal TM11 and the second connection terminal TM12 according to the power supply signal SON1 , so that the power supply unit 110 can receive the power PS1 continuously. In other words, the control unit 120 controls the switch unit 130 to turn on the first connection terminal TM11 and the second connection terminal TM12, so that after the first power terminal and the second power terminal of the power switch SW1 are disconnected, the power source PS1 can still pass through the switch unit 130. provided to the power supply unit 110 .
另一方面，当电子装置100关机时，控制单元120将提供断电信号SCT1给开关单元130。此时，开关单元130将依据断电信号SCT1断路第一连接端TM11与第二连接端TM12，进而致使电源供应单元110无法接收到电源PS1。换言之，当电子装置100关机时，供应至电子装置100的电源PS1将完全地被切断，进而致使电子装置100不消耗电源。由此，本实施例的电子装置100可以在不拔除电源插头的方式下，即可达到零耗电的效果。据此，本实施例的电子装置100不仅可以提高系统的省电效能，还可降低因插头接线的毁损而引发的电线走火的风险。On the other hand, when the electronic device 100 is turned off, the control unit 120 will provide the power-off signal SCT1 to the switch unit 130 . At this time, the switch unit 130 will disconnect the first connection terminal TM11 and the second connection terminal TM12 according to the power-off signal SCT1 , so that the power supply unit 110 cannot receive the power PS1 . In other words, when the electronic device 100 is turned off, the power PS1 supplied to the electronic device 100 will be completely cut off, so that the electronic device 100 does not consume power. Therefore, the electronic device 100 of this embodiment can achieve the effect of zero power consumption without unplugging the power plug. Accordingly, the electronic device 100 of this embodiment can not only improve the power saving efficiency of the system, but also reduce the risk of electric wire fire caused by the damage of the plug connection.
图2为依据本发明的另一实施例的电子装置的方框图。参照图2，电子装置200包括电源开关SW2、电源供应单元210、控制单元220、开关单元230、以及内部电路240。所述电子装置200可例如是平板电脑、台式电脑、笔记本电脑、或是多机一体的电脑(AIO)。FIG. 2 is a block diagram of an electronic device according to another embodiment of the invention. Referring to FIG. 2 , the electronic device 200 includes a power switch SW2 , a power supply unit 210 , a control unit 220 , a switch unit 230 , and an internal circuit 240 . The electronic device 200 can be, for example, a tablet computer, a desktop computer, a notebook computer, or an all-in-one computer (AIO).
请参照图2，当电源开关SW2被按压时，第一电源端与第二电源端将导通一预设时间。此时，电源PS2将提供至电源供应单元210，且电子装置200开机。此外，电源供应单元210可利用电源PS2提供多个系统电压VS21～VS23。举例来说，在本实施例中，电源供应单元210包括电源配接器211与电源电路212，且所述电源PS2为一交流电压。电源配接器211连接电源开关SW2的第二电源端，并将来自电源开关SW2的电源PS2(交流电压)转换为直流电压。此外，电源电路212连接电源配接器211，并将直流电压转换为系统电压VS21～VS23。Referring to FIG. 2 , when the power switch SW2 is pressed, the first power terminal and the second power terminal are turned on for a preset time. At this time, the power PS2 will be provided to the power supply unit 210, and the electronic device 200 will be turned on. In addition, the power supply unit 210 can use the power supply PS2 to provide a plurality of system voltages VS21 - VS23 . For example, in this embodiment, the power supply unit 210 includes a power adapter 211 and a power circuit 212 , and the power PS2 is an AC voltage. The power adapter 211 is connected to the second power terminal of the power switch SW2, and converts the power PS2 (AC voltage) from the power switch SW2 into a DC voltage. In addition, the power circuit 212 is connected to the power adapter 211 and converts the DC voltage into system voltages VS21 - VS23 .
另一方面，控制单元220会由系统电压VS22所驱动，以进行相关运作。此外，为了确保控制单元220可以完整地被驱动，在电子装置200开机的初期，开关单元230会先利用系统电压VS21来导通第一连接端TM21与第二连接端TM22，以致使电源供应单元210在控制单元220完整被驱动之前可以持续地接收到电源PS2。On the other hand, the control unit 220 is driven by the system voltage VS22 to perform related operations. In addition, in order to ensure that the control unit 220 can be completely driven, the switch unit 230 will use the system voltage VS21 to conduct the first connection terminal TM21 and the second connection terminal TM22 at the initial stage of the electronic device 200, so that the power supply unit The 210 may continuously receive the power PS2 until the control unit 220 is completely driven.
此外，当控制单元220被驱动而进行运作时，控制单元220将依据电子装置200的操作模式，而提供断电信号SCT2或是供电信号SON2。举例来说，在本实施例中，控制单元220包括开关电路221与嵌入式控制器222。开关电路221连接嵌入式控制器222与开关单元230，且嵌入式控制器222连接电源供应单元210以及内部电路240。In addition, when the control unit 220 is driven to operate, the control unit 220 will provide the power-off signal SCT2 or the power supply signal SON2 according to the operation mode of the electronic device 200 . For example, in this embodiment, the control unit 220 includes a switch circuit 221 and an embedded controller 222 . The switch circuit 221 is connected to the embedded controller 222 and the switch unit 230 , and the embedded controller 222 is connected to the power supply unit 210 and the internal circuit 240 .
在整体操作上，当电子装置200处在开机/工作状态时，嵌入式控制器222会将多个状态信号的其一维持在第一电平(例如：逻辑1)。另一方面，对开关电路221而言，当所述多个状态信号的其一维持在第一电平(例如：逻辑1)时，开关电路221将提供具有第二电平(例如：逻辑0)的设定信号，以作为供电信号SON2。In overall operation, when the electronic device 200 is in the power-on/working state, the embedded controller 222 maintains one of the state signals at the first level (for example, logic 1). On the other hand, for the switch circuit 221, when one of the plurality of status signals is maintained at the first level (for example: logic 1), the switch circuit 221 will provide a signal with the second level (for example: logic 0). ) setting signal as the power supply signal SON2.
举例来说，图3为依据本发明的一实施例的开关电路的电路图。参照图3，开关电路221包括电阻R3以及多个开关SW31～SW34。电阻R3的第一电源端接收电压V3，且电阻R3的第二电源端产生设定信号S31。此外，开关SW31～SW34连接在电阻R3的第二电源端与接地端之间。再者，所述多个状态信号包括休眠控制信号slp-s3#、休眠控制信号slp-s4#、唤醒控制信号wake#、以及特定控制信号GPO。特定控制信号GPO是使用者通过基本输入输出系统(BIOS)所设定的特殊功能，以确保通用输出入端口(GPIO)所提供的信号维持在第一电平。For example, FIG. 3 is a circuit diagram of a switch circuit according to an embodiment of the present invention. Referring to FIG. 3 , the switch circuit 221 includes a resistor R3 and a plurality of switches SW31˜SW34. The first power terminal of the resistor R3 receives the voltage V3, and the second power terminal of the resistor R3 generates the setting signal S31. In addition, the switches SW31˜SW34 are connected between the second power terminal and the ground terminal of the resistor R3. Furthermore, the plurality of status signals include a sleep control signal slp-s3#, a sleep control signal slp-s4#, a wake-up control signal wake#, and a specific control signal GPO. The specific control signal GPO is a special function set by the user through the basic input output system (BIOS), so as to ensure that the signal provided by the general purpose input output port (GPIO) is maintained at the first level.
在整体运作上，当电子装置200处在休眠状态时，休眠控制信号slp-s3#会被维持在第一电平(例如：逻辑1)。由此，开关SW31将导通，进而将设定信号S31的电平下拉至接地电压。也就是说，此时的开关电路221将产生具有第二电平(例如：逻辑0)的设定信号S31，且其将被视为供电信号SON2。除此之外，当特定事件发生时，例如：电子装置200切换至待机状态、休眠状态、睡眠状态或是使用者自行所设定的特殊状态时，休眠控制信号slp-s4#、唤醒控制信号wake#、或是特定控制信号GPO也将会被切换至第一电平(例如：逻辑1)。此时，部分的开关SW31～SW34将导通，进而致使开关电路221产生具有第二电平(例如：逻辑0)的设定信号S31，也就是供电信号SON2。In overall operation, when the electronic device 200 is in the sleep state, the sleep control signal slp-s3# will be maintained at the first level (for example, logic 1). As a result, the switch SW31 is turned on, and the level of the setting signal S31 is pulled down to the ground voltage. That is to say, the switch circuit 221 at this time will generate the setting signal S31 with the second level (for example: logic 0), and it will be regarded as the power supply signal SON2. In addition, when a specific event occurs, for example: when the electronic device 200 switches to a standby state, a sleep state, a sleep state, or a special state set by the user, the sleep control signal slp-s4#, the wake-up control signal wake#, or the specific control signal GPO will also be switched to the first level (for example: logic 1). At this time, some of the switches SW31˜SW34 are turned on, thereby causing the switch circuit 221 to generate the setting signal S31 with a second level (for example: logic 0), that is, the power supply signal SON2.
另一方面，当电子装置200关机时，嵌入式控制器222会将所述多个状态信号维持在第二电平(例如：逻辑0)。此外，当所述多个状态信号维持在第二电平(例如：逻辑0)，开关电路221将提供具有第一电平(例如：逻辑1)的设定信号，以作为断电信号SCT2。On the other hand, when the electronic device 200 is turned off, the embedded controller 222 maintains the plurality of status signals at the second level (for example, logic 0). In addition, when the plurality of status signals are maintained at the second level (eg, logic 0), the switch circuit 221 will provide a setting signal with the first level (eg, logic 1) as the power-off signal SCT2 .
举例来说，如图3所示，当电子装置200执行关机时，所述的多个状态信号，例如：休眠控制信号slp-s3#、休眠控制信号slp-s4#、唤醒控制信号wake#、以及特定控制信号GPO等，都将维持在第二电平(例如：逻辑0)。由此，开关SW31～SW34都不导通，进而导致设定信号S31的电平拉升至电压V3。也就是说，此时的开关电路221将产生具有第一电平(例如：逻辑1)的设定信号S31，且其将被视为断电信号SCT2。For example, as shown in FIG. 3, when the electronic device 200 is shut down, the multiple status signals, such as: sleep control signal slp-s3#, sleep control signal slp-s4#, wake-up control signal wake#, And the specific control signal GPO and so on will be maintained at the second level (for example: logic 0). As a result, none of the switches SW31 - SW34 are turned on, which further causes the level of the setting signal S31 to be pulled up to the voltage V3 . That is to say, the switch circuit 221 at this time will generate the setting signal S31 with the first level (for example: logic 1), and it will be regarded as the power-off signal SCT2.
请继续参照图2，针对开关电路221所产生的供电信号SON2与断电信号SCT2，开关单元230将依据供电信号SON2导通第一连接端TM21与第二连接端TM22，进而致使电源供应单元210可以持续地接收到电源PS2。此外，开关单元230会依据断电信号SCT2断路第一连接端TM21与第二连接端TM22，进而切断供应至电子装置200的电源PS1。Please continue to refer to FIG. 2, for the power supply signal SON2 and the power-off signal SCT2 generated by the switch circuit 221, the switch unit 230 will conduct the first connection terminal TM21 and the second connection terminal TM22 according to the power supply signal SON2, thereby causing the power supply unit 210 to The power PS2 can be continuously received. In addition, the switch unit 230 disconnects the first connection terminal TM21 and the second connection terminal TM22 according to the power-off signal SCT2 , thereby cutting off the power supply PS1 supplied to the electronic device 200 .
举例来说，图4为依据本发明的一实施例的开关单元的电路图。开关单元230包括继电器410、控制电路420、以及开关SW4。其中，继电器410具有第一连接端TM21与第二连接端TM22。控制电路420连接继电器410。此外，开关SW4分别连接控制电路420与控制单元220中的开关电路221。For example, FIG. 4 is a circuit diagram of a switch unit according to an embodiment of the present invention. The switch unit 230 includes a relay 410, a control circuit 420, and a switch SW4. Wherein, the relay 410 has a first connection terminal TM21 and a second connection terminal TM22 . The control circuit 420 is connected to the relay 410 . In addition, the switch SW4 is respectively connected to the control circuit 420 and the switch circuit 221 in the control unit 220 .
进一步来看，控制电路420包括二极管D4、N沟道晶体管MN4、电阻R41与R42、以及电容C4。此外，继电器410包括线圈L4、共同接点CO1、常闭接点NC1与常开接点N01。在连接上，继电器410的共同接点CO1与常开接点N01分别连接继电器410的第一连接端TM21与第二连接端TM22，以由此控制第一连接端TM21与第二连接端TM22的导通状态。Further, the control circuit 420 includes a diode D4, an N-channel transistor MN4, resistors R41 and R42, and a capacitor C4. In addition, the relay 410 includes a coil L4 , a common contact CO1 , a normally closed contact NC1 and a normally open contact N01 . In terms of connection, the common contact CO1 and the normally open contact N01 of the relay 410 are respectively connected to the first connection terminal TM21 and the second connection terminal TM22 of the relay 410, thereby controlling the conduction of the first connection terminal TM21 and the second connection terminal TM22 state.
再者，继电器410的线圈L4的第一电源端连接电源供应单元210，以接收系统电压VS1，且继电器410的线圈L4的第二电源端连接N沟道晶体管MN4的漏极。二极管D4的阴极连接线圈L4的第一电源端，且二极管D4的阳极连接线圈L4的第二电源端。电阻R41的第一电源端连接N沟道晶体管MN4的源极，且电阻R41的第二电源端连接接地端。电容C4的第一电源端连接电源供应单元210，且电容C4的第二电源端连接N沟道晶体管MN4的栅极。电阻R42的第一电源端连接电容C4的第二电源端，且电阻R42的第二电源端连接接地端。开关SW4的第一电源端连接电容C4的第一电源端，且开关SW4的第二电源端连接电容C4的第二电源端。Moreover, the first power terminal of the coil L4 of the relay 410 is connected to the power supply unit 210 to receive the system voltage VS1 , and the second power terminal of the coil L4 of the relay 410 is connected to the drain of the N-channel transistor MN4 . The cathode of the diode D4 is connected to the first power terminal of the coil L4, and the anode of the diode D4 is connected to the second power terminal of the coil L4. A first power terminal of the resistor R41 is connected to the source of the N-channel transistor MN4, and a second power terminal of the resistor R41 is connected to the ground. A first power terminal of the capacitor C4 is connected to the power supply unit 210 , and a second power terminal of the capacitor C4 is connected to the gate of the N-channel transistor MN4 . A first power supply terminal of the resistor R42 is connected to a second power supply terminal of the capacitor C4, and a second power supply terminal of the resistor R42 is connected to a ground terminal. The first power supply terminal of the switch SW4 is connected to the first power supply terminal of the capacitor C4, and the second power supply terminal of the switch SW4 is connected to the second power supply terminal of the capacitor C4.
在整体操作上，电容C4、电阻R41与电阻R42是用以决定N沟道晶体管MN4的偏压点。此外，N沟道晶体管MN4是用以驱动线圈L4，且二极管D4是用以提供线圈L4的放电路径。在此，当开关单元230接收到供电信号SON2时，开关SW4将导通，进而致使位于节点N4的电压被拉升至系统电压VS21。随着节点N4的电压的提升，N沟道晶体管MN4将导通，进而驱动线圈L4，并致使继电器410的共同接点CO1连接至常开接点N01。也就是说，当开关单元230接收到供电信号SON2时，开关单元230的第一连接端TM21与第二连接端TM22将相互导通。In overall operation, the capacitor C4, the resistor R41 and the resistor R42 are used to determine the bias point of the N-channel transistor MN4. In addition, the N-channel transistor MN4 is used to drive the coil L4, and the diode D4 is used to provide a discharge path for the coil L4. Here, when the switch unit 230 receives the power supply signal SON2 , the switch SW4 will be turned on, so that the voltage at the node N4 is pulled up to the system voltage VS21 . As the voltage of the node N4 increases, the N-channel transistor MN4 will be turned on, thereby driving the coil L4, and causing the common contact CO1 of the relay 410 to be connected to the normally open contact N01. That is to say, when the switch unit 230 receives the power supply signal SON2 , the first connection terminal TM21 and the second connection terminal TM22 of the switch unit 230 will conduct with each other.
另一方面，当开关单元230接收到断电信号SCT2时，开关SW4将不导通。此时，系统电压VS21将开始对电容C4进行充电，导致位于节点N4的电压开始往下降。随着节点N4的电压的下降，N沟道晶体管MN4将无法导通，进而致使继电器410的共同接点CO1连接至常闭接点NC1。换言之，当开关单元230接收到断电信号SCT2时，开关单元230的第一连接端TM21与第二连接端TM22将无法相互导通。On the other hand, when the switch unit 230 receives the power-off signal SCT2, the switch SW4 will not be turned on. At this time, the system voltage VS21 will start to charge the capacitor C4, causing the voltage at the node N4 to start to drop. As the voltage of the node N4 drops, the N-channel transistor MN4 will not be turned on, so that the common contact CO1 of the relay 410 is connected to the normally closed contact NC1 . In other words, when the switch unit 230 receives the power-off signal SCT2 , the first connection terminal TM21 and the second connection terminal TM22 of the switch unit 230 will not be able to conduct each other.
值得一提的是，在控制单元220尚未被驱动之前，开关单元230是无法接收到供电信号SON2与断电信号SCT2。因此，电子装置200在开机的初期，开关单元230将利用电容C4与电阻R42所形成的延迟机制，促使N沟道晶体管MN4维持短暂的导通，进而致使第一连接端TM21与第二连接端TM22短暂地电性相连。如此一来，电源供应单元210在控制单元220完整被驱动之前，将可以持续地接收到电源PS2。It is worth mentioning that before the control unit 220 is driven, the switch unit 230 cannot receive the power-on signal SON2 and the power-off signal SCT2 . Therefore, when the electronic device 200 is turned on initially, the switch unit 230 will use the delay mechanism formed by the capacitor C4 and the resistor R42 to keep the N-channel transistor MN4 temporarily turned on, thereby causing the first connection terminal TM21 to connect to the second connection terminal TM22 is electrically connected briefly. In this way, the power supply unit 210 can continuously receive the power PS2 before the control unit 220 is completely driven.
开关单元230的第一连接端TM21与第二连接端TM22之所以可以在开机的初期维持短暂的电性相连，主要的原因在于，在直流瞬时反应下，一开始接收到系统电压VS2的电容C4是被视为短路，因此，在电子装置200开机的初期，位于节点N4的电压是维持在系统电压VS21的。此外，电容C4必须等待一延迟时间后才会充电至系统电压VS2。也就是说，位于节点N4的电压会在延迟时间内逐渐往下降。The main reason why the first connection terminal TM21 and the second connection terminal TM22 of the switch unit 230 can maintain short-term electrical connection at the initial stage of power-on is that, under the DC transient response, the capacitor C4 initially receives the system voltage VS2 It is regarded as a short circuit. Therefore, the voltage at the node N4 is maintained at the system voltage VS21 when the electronic device 200 is powered on. In addition, the capacitor C4 must wait for a delay time before being charged to the system voltage VS2. That is to say, the voltage at the node N4 will gradually decrease during the delay time.
其中，延迟时间的大小是取决于电容C4与电阻R42的阻抗值。因此，可利用电容C4与电阻R42的阻抗值的调整，将延迟时间设定为大于控制单元220的驱动时间。如此一来，在控制单元220尚未被驱动之前，通过电容C4的瞬时反应，开关SW4在延迟时间内将维持在导通的状态，进而致使开关单元230的第一连接端TM21与第二连接端TM22在开机的初期维持短暂的电性相连。Wherein, the delay time depends on the impedance values of the capacitor C4 and the resistor R42. Therefore, the delay time can be set to be greater than the driving time of the control unit 220 by adjusting the impedance values of the capacitor C4 and the resistor R42 . In this way, before the control unit 220 is driven, through the instantaneous response of the capacitor C4, the switch SW4 will be maintained in the conduction state within the delay time, thereby causing the first connection end TM21 and the second connection end of the switch unit 230 to be connected to each other. TM22 maintains a short-term electrical connection during the initial start-up.
总言之，电子装置200处在开机状态下，开关单元230的第一连接端TM21与第二连接端TM22将相互导通，以致使电源供应单元210可以持续地提供系统电压VS21～VS23。反之，当电子装置200关机时，开关单元230的第一连接端TM21与第二连接端TM22将断路，进而切断供应至电子装置200的电源。In a word, when the electronic device 200 is turned on, the first connection terminal TM21 and the second connection terminal TM22 of the switch unit 230 are connected to each other, so that the power supply unit 210 can continuously provide the system voltages VS21 - VS23 . Conversely, when the electronic device 200 is turned off, the first connection terminal TM21 and the second connection terminal TM22 of the switch unit 230 will be disconnected, thereby cutting off the power supplied to the electronic device 200 .
如此一来，本实施例的电子装置200在关机状态下将可达到零耗电的效果，进而提高系统的省电效能。此外，由于电子装置200在关机状态下是不耗电的，因此在开机的过程中，本实施例的嵌入式控制器222是在第一次接收到系统电压VS22的情况下执行开机程序。也就是说，当嵌入式控制器222被系统电压VS22驱动时，嵌入式控制器222将执行开机程序。In this way, the electronic device 200 of this embodiment can achieve the effect of zero power consumption in the shutdown state, thereby improving the power saving performance of the system. In addition, since the electronic device 200 does not consume power in the shutdown state, during the startup process, the embedded controller 222 of this embodiment executes the startup procedure when receiving the system voltage VS22 for the first time. That is to say, when the embedded controller 222 is driven by the system voltage VS22, the embedded controller 222 will execute the boot procedure.
图5为依据本发明的又一实施例的电子装置的方框图。参照图5，电子装置500包括电源开关SW5、电源供应单元510、控制单元520、开关单元530、内部电路540、以及电源配接器550。其中，电源供应单元510包括电源电路511，且控制单元520包括开关电路521与嵌入式控制器522。FIG. 5 is a block diagram of an electronic device according to yet another embodiment of the invention. Referring to FIG. 5 , the electronic device 500 includes a power switch SW5 , a power supply unit 510 , a control unit 520 , a switch unit 530 , an internal circuit 540 , and a power adapter 550 . Wherein, the power supply unit 510 includes a power circuit 511 , and the control unit 520 includes a switch circuit 521 and an embedded controller 522 .
参照图5，电源开关SW5的第一电源端连接电源配接器550，以接收电源PS5，且电源开关SW5的第二电源端连接至电源供应单元510。其中，本实施例所述的电源PS5为一直流电压，且所述的电源PS5(直流电压)是由电源配接器550对交流电压进行转换而产生的。此外，当电源开关SW5被按压时，第一电源端将导通第二电源端一预设时间。此时，电源PS5将提供至电源供应单元510，且电子装置500开机。此外，电源供应单元510中的电源电路511会将电源PS5(直流电压)转换为系统电压VS51～VS53，以供开关单元530、控制单元520以及内部电路540使用。Referring to FIG. 5 , the first power end of the power switch SW5 is connected to the power adapter 550 to receive the power PS5 , and the second power end of the power switch SW5 is connected to the power supply unit 510 . Wherein, the power PS5 described in this embodiment is a DC voltage, and the power PS5 (DC voltage) is generated by converting the AC voltage by the power adapter 550 . In addition, when the power switch SW5 is pressed, the first power terminal will turn on the second power terminal for a preset time. At this time, the power PS5 will be provided to the power supply unit 510, and the electronic device 500 will be turned on. In addition, the power circuit 511 in the power supply unit 510 converts the power PS5 (DC voltage) into system voltages VS51 - VS53 for use by the switch unit 530 , the control unit 520 and the internal circuit 540 .
再者，控制单元520会由系统电压VS52所驱动，以进行相关地运作。此外，电子装置500在开机的初期，开关单元530会先利用系统电压VS51来导通第一连接端TM51与第二连接端TM52，以致使电源供应单元510在控制单元520完整被驱动之前可以持续地接收到电源PS5。此外，当控制单元520被驱动后，控制单元520将会依据电子装置500的操作模式，而提供断电信号SCT5或是供电信号SON5给开关单元530。Furthermore, the control unit 520 is driven by the system voltage VS52 to perform related operations. In addition, when the electronic device 500 is turned on, the switch unit 530 will first use the system voltage VS51 to conduct the first connection terminal TM51 and the second connection terminal TM52, so that the power supply unit 510 can continue to operate before the control unit 520 is completely driven. ground to receive power PS5. In addition, when the control unit 520 is driven, the control unit 520 will provide the power-off signal SCT5 or the power supply signal SON5 to the switch unit 530 according to the operation mode of the electronic device 500 .
就控制单元520的详细操作来看，当电子装置500处在开机状态时，嵌入式控制器522会将多个状态信号的其一维持在第一电平，以致使开关电路521提供具有第二电平的设定信号，也即供电信号SON5。此外，当电子装置500关机时，嵌入式控制器522会将所述多个状态信号维持在第二电平，以致使开关电路521提供具有第一电平的设定信号，也即断电信号SCT5。As far as the detailed operation of the control unit 520 is concerned, when the electronic device 500 is in the power-on state, the embedded controller 522 will maintain one of the multiple state signals at the first level, so that the switch circuit 521 provides a second level The level setting signal is the power supply signal SON5. In addition, when the electronic device 500 is turned off, the embedded controller 522 will maintain the plurality of status signals at the second level, so that the switch circuit 521 provides the setting signal with the first level, that is, the power-off signal SCT5.
针对开关电路521所产生的供电信号SON5与断电信号SCT5，开关单元530将依据供电信号SON5导通第一连接端TM51与第二连接端TM52，进而致使电源供应单元510可以持续地接收到电源PS5。换言之，控制单元520会控制开关单元530导通第一连接端TM51与第二连接端TM52，以致使第一电源端与第二电源端断路后，电源PS5仍经由开关单元530提供至电源供应单元510。For the power supply signal SON5 and the power-off signal SCT5 generated by the switch circuit 521, the switch unit 530 will conduct the first connection terminal TM51 and the second connection terminal TM52 according to the power supply signal SON5, so that the power supply unit 510 can continuously receive power. PS5. In other words, the control unit 520 controls the switch unit 530 to turn on the first connection terminal TM51 and the second connection terminal TM52, so that after the first power terminal and the second power terminal are disconnected, the power PS5 is still provided to the power supply unit through the switch unit 530 510.
此外，开关单元530会依据断电信号SCT5断路第一连接端TM51与第二连接端TM52，以切断供应至电子装置500的电源PS5。换言之，当电子装置500关机时，开关单元530的第一连接端TM51与第二连接端TM52将断路，进而切断供应至电子装置500的电源。如此一来，本实施例的电子装置500在关机状态下将可达到零耗电的效果，进而提高系统的省电效能。至于本实施例的详细操作以及部分电路方框的实施型态已包含在上述各实施例中，故在此不予赘述。In addition, the switch unit 530 disconnects the first connection terminal TM51 and the second connection terminal TM52 according to the power-off signal SCT5 , so as to cut off the power PS5 supplied to the electronic device 500 . In other words, when the electronic device 500 is turned off, the first connection terminal TM51 and the second connection terminal TM52 of the switch unit 530 will be disconnected, thereby cutting off the power supplied to the electronic device 500 . In this way, the electronic device 500 of this embodiment can achieve the effect of zero power consumption in the shutdown state, thereby improving the power saving performance of the system. As for the detailed operation of this embodiment and the implementation types of some circuit blocks, which have been included in the above-mentioned embodiments, they will not be repeated here.
综上所述，本发明是将开关单元的两连接端与电源开关的两端相互并联，并在电子装置执行关机时，通过开关单元的两连接端的不导通，切断供应至电子装置的电源。如此一来，电子装置在关机状态下将可达到零耗电的效果，进而提高系统的省电效能。此外，为了让电子装置可以在待机、休眠、睡眠或是特殊状态下依旧可以保留电源，本发明还在特定事件发生时，利用多个状态信号的设定致使控制单元产生供电信号。由此，将可致使电子装置的省电机制在使用上还具弹性。To sum up, the present invention connects the two connecting ends of the switch unit and the two ends of the power switch in parallel, and cuts off the power supply to the electronic device through the non-conduction of the two connecting ends of the switch unit when the electronic device is shut down. . In this way, the electronic device can achieve the effect of zero power consumption in the shutdown state, thereby improving the power saving performance of the system. In addition, in order to keep the power supply of the electronic device in standby, dormancy, sleep or special state, the present invention also utilizes the setting of multiple state signals to cause the control unit to generate a power supply signal when a specific event occurs. Thus, the power saving mechanism of the electronic device can be used more flexibly.
虽然本发明已以实施例揭示如上，然而其并非用以限定本发明，任何所属技术领域中普通技术人员，在不脱离本发明的精神和范围内，当可作些许的还动与润饰，故本发明的保护范围当视权利要求所界定的范围为准。Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be determined by the scope defined by the claims.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110072508.9ACN102681448B (en) | 2011-03-17 | 2011-03-17 | Electronic device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110072508.9ACN102681448B (en) | 2011-03-17 | 2011-03-17 | Electronic device |
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| CN102681448A CN102681448A (en) | 2012-09-19 |
| CN102681448Btrue CN102681448B (en) | 2015-05-13 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201110072508.9AActiveCN102681448B (en) | 2011-03-17 | 2011-03-17 | Electronic device |
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