CN105573459B - Electronic device and signal processing method - Google Patents
Electronic device and signal processing method Download PDFInfo
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- CN105573459B CN105573459B CN201510960805.5A CN201510960805A CN105573459B CN 105573459 B CN105573459 B CN 105573459B CN 201510960805 A CN201510960805 A CN 201510960805A CN 105573459 B CN105573459 B CN 105573459B
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Abstract
The embodiment of the invention discloses electronic equipment and a signal processing method, wherein the electronic equipment comprises: a functional component; the power supply circuit is connected with the functional component and is used for supplying power to the functional component; the controller is respectively connected with the functional component and the power supply circuit and used for forming a power-off command when illegal power-off is detected and sending the power-off command to the functional component; and the capacitor is connected with the power supply circuit and used for supplying power to the functional component through at least part of the power supply circuit after illegal power failure, so that the functional component completes preset closing operation within the power supply time of the capacitor after receiving the power failure command.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to an electronic device and a signal processing method.
Background
At present, along with the development of electronic technology, more and more functional components are integrated on electronic equipment, and the realized functions are more and more powerful. Some functional units have very strict time sequences when being opened and closed, and if the time sequences are disordered, electronic elements in the functional units are burnt or logic failure problems occur. However, in the prior art, there is a sudden power failure, which is called as an illegal power failure, for example, an illegal power failure caused by the disconnection of the mains supply and an illegal power failure caused by the irregular plugging of the user. These illegal power outages all cause damage to the functional units, resulting in high failure rates and short service lives of the electronic devices.
Disclosure of Invention
In view of this, the embodiments of the present invention are expected to provide an electronic device and a signal processing method, which can at least alleviate the damage to the electronic device caused by the illegal power failure.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a first aspect of an embodiment of the present invention provides an electronic device, including:
a functional component;
the power supply circuit is connected with the functional component and is used for supplying power to the functional component;
the controller is respectively connected with the functional component and the power supply circuit and used for forming a power-off command when illegal power-off is detected and sending the power-off command to the functional component;
and the capacitor is connected with the power supply circuit and used for supplying power to the functional component through at least part of the power supply circuit after illegal power failure, so that the functional component completes preset closing operation within the power supply time of the capacitor after receiving the power failure command.
Based on the above scheme, the electronic device further includes:
and the first power supply is connected with the controller and used for providing working power supply for the controller.
Based on the scheme, the controller is further used for providing a control signal which is kept conducted after the power supply circuit is powered off illegally;
the capacitor supplies power to the functional component when the power supply circuit is conducted.
Based on the scheme, the power supply circuit is provided with a controlled switch;
the controlled switch includes:
the two connecting ends are respectively connected in the power supply circuit;
the control end is connected with the controller and is used for switching on or switching off the two connecting ends according to a control signal of the controller;
and the capacitor supplies power to the functional component through the connecting end.
Based on the scheme, the capacitance parameter of the capacitor is matched with the working electrical parameter required by the functional component to execute the preset closing operation.
Based on the above scheme, the functional component comprises a control component of the projector.
A second aspect of the embodiments of the present invention provides a signal processing method, where the method includes:
detecting an illegal power failure;
after illegal power failure is detected, providing power for a functional component by using discharge of a capacitor, forming a power failure command, and sending the power failure command to the functional component;
the functional component completes a predetermined shutdown operation after receiving the power-down command and within a powering time of the capacitor.
Based on the scheme, the method comprises the following steps:
and utilizing the first power supply to provide working power supply for the controller forming the power-off command.
Based on the above scheme, the method further comprises:
forming a control signal for controlling the conduction of a power supply circuit for supplying power to the functional component from the capacitor;
and controlling the capacitor to conduct a power supply circuit for supplying power to the functional component by using the control signal.
Based on the scheme, the functional component comprises a control structure of the projector;
the functional component completes a predetermined shutdown operation within a powering time of the capacitor after receiving the power-down command, including:
the functional component completes a projection control shutdown operation after receiving the power-off command and within a power-on time of the capacitor.
According to the electronic equipment and the signal processing method provided by the embodiment of the invention, the controller is used for automatically detecting the illegal power failure, and when the illegal power failure occurs, the power failure command is formed, so that the functional component is controlled to start to execute the preset closing operation, and meanwhile, the capacitor discharge is used for providing the working power supply required by executing the preset closing operation for the functional component, so that the damage caused by the fact that the functional component cannot execute the preset closing operation due to the illegal power failure is reduced, and the service life of the functional component is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a first electronic device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second electronic device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third electronic device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fourth electronic device according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a signal processing method according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides an electronic device, including:
a functional component 110;
a power supply circuit 120 connected to the functional unit 110 for supplying power to the functional unit 110;
a controller 130, respectively connected to the functional unit 110 and the power supply circuit 120, for forming a power-off command when an illegal power-off is detected, and sending the power-off command to the functional unit 110;
and a capacitor 140 connected to the power supply circuit, for supplying power to the functional unit 110 through at least part of the power supply circuit 120 after the illegal power failure, so that the functional unit completes a predetermined shutdown operation within a power supply time of the capacitor after receiving the power failure command.
The electronic device described in the present embodiment may include various electronic devices such as a notebook computer, a desktop computer, a projector controller, and the like.
The functional unit 110 is a sensitive unit for various illegal power failures, which may cause a malfunction of the functional unit or damage of the electronic components. For example, the functional component 110 may comprise a control component of a projector. The control part of the projector usually has a very strict shutdown time sequence when the projector is shut down, and if the shutdown time sequence does not cause the phenomena of logic disorder and burning of the memory logic chip, it is obvious that the projector is greatly damaged by illegal power failure. Of course, the functional unit 110 described in this embodiment is not limited to the control unit of the projector, and may also include a structure such as a memory sensitive to illegal disconnection in the electronic device.
The power supply circuit 120 according to this embodiment may include a plurality of circuits, for example, the power supply circuit may include a first power supply circuit and a second power supply circuit, the first power supply circuit is configured to provide a first operating voltage to the functional unit 110, and the second power supply circuit is configured to provide a second operating voltage to the functional unit 110; wherein the first operating voltage is not equal to the second operating voltage. For example, a first power supply circuit may be used to provide an operating voltage of 5v to a control component of a projector, while the second power supply circuit may be used to provide an operating voltage of 3v to a control component of the projector.
The controller 130 according to this embodiment may include various types of electronic devices having control functions, such as a controller EC or a serial input/output controller SIO. EC and SIO are control structures with simple structure, low cost and small volume, and can simply and conveniently detect power failure and generate power failure commands. In this embodiment, the controller 130 can not only determine whether an illegal power failure occurs and form a power failure command, but also control the on and off of the power supply circuits 120, and when there is more than one power supply circuit 120, the controller 130 can be connected to each power supply circuit of the functional unit 110 to control the on and off of each power supply circuit 120. The controller 130 is also used to maintain the conduction of the power supply circuit 120 after the illegal power failure occurs and before the capacitor is discharged or stops supplying power.
The controller 130 in this embodiment may also be configured to determine whether an illegal power failure occurs currently, for example, receive an illegal power failure signal sent by other electronic devices before being turned off, or automatically consider an illegal power failure by detecting that a power failure occurs when a legal power failure signal is not received.
For example, the controller is further connected to a power supply structure for normally supplying power to the electronic device and the processor, and when a normal power failure occurs, the controller 130 receives a legal power failure instruction sent by the processor. The controller 130 is connected to the power supply structure to determine whether the power supply structure is supplying power by detecting a voltage or a current. When the controller 130 detects that the power supply structure stops supplying power and does not receive the legal power-off command sent by the processing, it may be determined that an illegal power-off occurs. There are many structures for detecting an illegal power failure in the electronic device, and the structure is not limited to the above structure. The power supply structure here may comprise a battery or a power supply interface.
In this embodiment, one or more capacitors 140 may be provided, and these capacitors 140 can be connected to the power supply circuit of the functional unit 110 to supply power to the functional unit 110. The capacitor described in this embodiment may also be a component structure of other circuits, and in this embodiment is multiplexed to supply power to the functional unit 110. Usually, a circuit board of the electronic device is provided with a plurality of capacitors, which may be used to implement other functions when the electronic device is normally powered, such as capacitors in an oscillator circuit. These capacitors are all used to store the power stored by the normal power supply of the electronic device during normal operation, and these power is usually released through the node element after the power of the electronic device is cut off, and in this embodiment, the electronic device will use these capacitors that need to be released to provide the functional unit 110 with the power for performing the predetermined shutdown operation. Typically, the time for the functional unit 110 to perform the predetermined shutdown operation will be short, for example, within seconds or milliseconds, and a certain capacitance can provide the required amount of power for the functional unit 110. In this embodiment, the electronic device multiplexes the capacitor having other functions to supply power to the functional component 110 after the illegal power failure, and the structure is ingenious, and the electric quantity required to be released by the capacitor is skillfully utilized. If the other functions performed by the capacitor are considered original functions, the original functions are functions other than supplying power to the functional component 110. Of course, the capacitor 140 of this embodiment may also be specially configured to provide the functional unit 110 with a capacitor that continues to be powered after an illegal power failure.
In this embodiment, the illegal power failure may include power failure caused by the power supply interface of the electronic device being disconnected, including power failure caused by a failure of mains supply, power failure caused by illegal plugging and unplugging of a user, and power failure caused by the user not operating according to shutdown; in short, the illegal power failure described in this embodiment including power failure that is not performed according to the preset power failure mode of the electronic device may be called illegal power failure.
In this embodiment, the controller 130 is connected to the functional unit 110 and the power supply circuit, respectively, and when detecting that the illegal power failure is, a power failure command is generated, the power failure command is sent to the functional unit 110, and the power supply circuit is maintained to be turned on. The capacitor is an electronic component capable of storing the capacitor, and in the working process of the electronic equipment, the capacitor can receive and store electric energy from a battery or a power supply interface of the electronic equipment. In this embodiment, if the controller detects an illegal power failure, the controller controls the capacitor to supply power to the projector, so that the capacitor 140 can maintain the power supply for a period of time even if the electronic device is illegally powered off. Functional unit 110 begins performing the predetermined shutdown operation after receiving the power down command and will complete the predetermined shutdown operation within the time that the capacitor remains powered. In this way, even if the electronic device is powered off illegally, the functional component 110 in this embodiment can still execute the predetermined shutdown operation corresponding to the legal power failure, so as to avoid the damage or functional failure of the electronic component caused by the functional structure 110 not having time to execute the predetermined shutdown operation due to the illegal power failure.
Example two:
as shown in fig. 1, the present embodiment provides an electronic device, including:
a functional component 110;
a power supply circuit 120 connected to the functional unit 110 for supplying power to the functional unit 110;
a controller 130, respectively connected to the functional unit 110 and the power supply circuit 120, for forming a power-off command when an illegal power-off is detected, and sending the power-off command to the functional unit 110 and maintaining the power supply circuit to be turned on;
and a capacitor 140 connected to the power supply circuit, for supplying power to the functional unit 110 through at least part of the power supply circuit 120 after the illegal power failure, so that the functional unit completes a predetermined shutdown operation within a power supply time of the capacitor after receiving the power failure command.
As shown in fig. 2, the electronic device further includes:
and a first power supply 150 connected to the controller 130 for supplying operating power to the controller 130.
In this embodiment, the first power supply 150 may be a real-time power supply, and can provide working power to the controller 130 without power failure, so that even if the entire electronic device is powered off illegally, other structures in the electronic device are all in a power-off state, the first power supply 150 can also provide power required for working to the controller 130.
In this embodiment, the first power supply 150 may also be one or more rechargeable batteries or capacitors, and can store electric energy during the operation of the electronic device, and supply the stored capacitor to the controller 130 when an illegal power failure occurs, so that the controller 130 can form a power failure command. In this embodiment, the first power supply 150 may be an external power supply of the controller 130, or may be an internal power supply of the controller 130. In any case, the first power supply 150 in that form can maintain the operation of the controller 130 for at least a period of time after an illegal power failure, for example, at least provide the operation power of the controller 130 for a predetermined time period during which the power supply unit 110 completes the shutdown operation.
Of course, in a specific implementation, the controller 130 may also be connected to the capacitor 140, and after the illegal power failure occurs, the operating power of the controller 130 is also provided by the capacitor 140, but in this case, a large capacity of the capacitor 140 may be needed to store the electric quantity. However, in order to ensure the stability of the operation of the controller 130, the first power supply 150 is introduced in the present embodiment to supply power exclusively to the controller 130, so as to ensure that the functional unit 110 can be turned off after completing a predetermined turning-off operation.
Example three:
as shown in fig. 1, the present embodiment provides an electronic device, including:
a functional component 110;
a power supply circuit 120 connected to the functional unit 110 for supplying power to the functional unit 110;
a controller 130, respectively connected to the functional unit 110 and the power supply circuit 120, for forming a power-off command when an illegal power-off is detected, and sending the power-off command to the functional unit 110;
and a capacitor 140 connected to the power supply circuit, for supplying power to the functional unit 110 through the power supply circuit 120 after the illegal power failure, so that the functional unit completes a predetermined shutdown operation within a power supply time of the capacitor after receiving the power failure command.
The electronic device further includes:
and a first power supply 150 connected to the controller 130 for supplying operating power to the controller 130.
The controller 130 is further configured to provide a control signal to the power supply circuit 120 to remain turned on after an illegal power failure;
the capacitor 140 supplies power to the functional component when the power supply circuit 120 is turned on.
In this embodiment, the first power supply unit 150 supplies power to these electronic components through the controller 110 to maintain the conduction of the power supply circuit, so that the capacitor 140 can be ensured to normally supply power to the functional component 110 through the power supply circuit 120. The capacitor 140 may be connected to the front ends of the electronic components, and the capacitor 140 can smoothly supply power to the functional unit 110 only when the electronic components are turned on, so that the capacitor 140 can supply power to the functional unit 110 when the power supply circuit 120 is turned on in this embodiment.
Of course, in a specific implementation process, the capacitor 140 is directly connected to the functional component 110 through a part of lines of the power supply circuit, and no other switching element is disposed in the part of lines, and in this case, after an illegal power failure occurs, the capacitor 140 may directly supply power to the functional component.
For example, as shown in fig. 3, a controlled switch is disposed on the power supply circuit 120;
the controlled switch 160 includes:
two connection terminals respectively connected to the power supply circuit 120;
and a control terminal connected to the controller 130, and turning on or off the two connection terminals according to a control signal of the controller 130.
In this embodiment, the controlled switch 160 may include a transistor, or various electronic components capable of receiving a control signal to control the connection and disconnection of the two other connection terminals.
For example, the controlled switch 160 is a transistor, which may include a gate, a source, and a drain. The controller 130 is connected to the gate, and the source and drain are connected to the power supply circuit 120. In this way, the controller 130 may input a voltage to the gate to maintain the source and the drain connected, so as to turn on the power supply circuit 120, or may input no voltage or a voltage smaller than a threshold voltage to turn off the source and the drain, so as to turn off the power supply circuit 120. The voltage provided by the controller 130 to the gate is the control signal.
In a specific implementation, the controller 130 may directly transmit the electrical signal provided by the first operating power source 150 to the controlled switch 160, or the controller 130 may utilize the first operating power source
In summary, the controller 130 of this embodiment can control the power supply circuit 120 to be turned on and off, for example, by the state of the controlled switch, the power supply circuit 120 can be simply controlled to be turned on and off; has the characteristic of simple structure.
Example four:
as shown in fig. 1, the present embodiment provides an electronic device, including:
a functional component 110;
a power supply circuit 120 connected to the functional unit 110 for supplying power to the functional unit 110;
a controller 130, respectively connected to the functional unit 110 and the power supply circuit 120, for forming a power-off command when an illegal power-off is detected, and sending the power-off command to the functional unit 110;
and a capacitor 140 connected to the power supply circuit, for supplying power to the functional unit 110 through at least part of the power supply circuit 120 after the illegal power failure, so that the functional unit completes a predetermined shutdown operation within a power supply time of the capacitor after receiving the power failure command.
The capacitance parameter of the capacitor 140 matches the operating electrical parameter required by the functional block 110 to perform the predetermined closing operation.
The operating electrical parameter described in this embodiment may include an operating voltage, an operating current, or an operating power.
For example, the capacitor 140 stores a required amount of power to support the functional component 110 to perform the predetermined shutdown operation. For example, the voltage provided by the capacitor 140 is a voltage required by the functional unit 110 to perform the predetermined shutdown operation, and if the required voltage is not provided, the corresponding operation may not be realized.
For example, the functional unit 110 includes two power supply circuits, namely a first power supply circuit and a second power supply circuit, the first power supply circuit providing a first operating voltage, and the second power supply circuit providing a second operating voltage. The capacitor 140 may also include a first capacitor and a second capacitor at this time. The first capacitor is connected to the first power supply circuit and is capable of providing a first operating voltage to the functional unit 110 via a portion of the first power supply circuit. The second capacitor is connected to the second power supply circuit, and can provide a second operating voltage to the functional unit 110 through a part of the second power supply circuit.
By matching the capacitance parameter of the capacitor with the operating electrical parameter of the functional unit 110, it is further ensured that the functional unit 110 is performing a legal shutdown operation including the predetermined shutdown operation, so as to prolong the service life of the electronic device and reduce the malfunction of the electronic device.
Of course, the electronic device described in this embodiment is an improvement on any one of the technical solutions of the electronic devices, and can be combined with the electronic devices mentioned in the foregoing embodiments without contradiction to form a new electronic device. For example, the electronic device according to this embodiment may include the first power supply, and may further include a controlled switch.
One specific example is provided below in connection with the above embodiments:
as shown in fig. 4, the present example provides an electronic device including or connected to a projector, a controller of the projector, a capacitor 1, a capacitor 2, an RTC battery, a Mosfet1, a Mosfet2, an EC/SIO controller, and the like.
And the projector is used for projecting and forming a projection picture.
And the controller of the projector is used for controlling the projection operation of the projector, and comprises a switch for controlling the projector, projection contents and the like.
An Embedded Controller (EC) or a Serial Input Output (SIO) Controller connected to the projector Controller, and sending a power-off command to the projector Controller after detecting an illegal power-off; meanwhile, the system is also connected with the Mosfet1 and the Mosfet2, and can be used for outputting a control signal 1 to the Mosfet1 and outputting a control signal 2 to the Mosfet2 when illegal power failure is detected; the control signal 1 and the control signal 2 are respectively used for controlling a power supply circuit for supplying power to a controller of the projector to be kept on, so that the capacitor 1 and the capacitor 2 are respectively used for supplying power to the controller of the projector through corresponding circuits. The Chinese corresponding to Mosfet is a Metal-Oxide-Semiconductor Field Effect Transistor, which is an abbreviation of Metal-Oxide-Semiconductor Field Effect Transistor.
A Real Time Clock (RTC) battery provides operating power for the EC or SIO controller.
The capacitor 1 is connected to the controller of the projector through the Mosfet1, and can store the capacitor and supply power to the controller of the projector.
The capacitor 2 is connected to the controller of the projector through the Mosfet2, and can store the capacitor and supply power to the controller of the projector.
The EC or SIO controller forms a power-off command, a control signal 1 and a control signal 2 after receiving an illegal power-off signal, triggers a controller of the projector to start and execute a preset closing operation through the power-off command, and maintains the conduction of a power supply circuit for supplying power to the controller of the projector through a capacitor through the control signal 1 and the control signal 2; to reduce power-off damage to the controller of the projector caused by an illegal power-off.
Example five:
as shown in fig. 5, the present embodiment provides a signal processing method, including:
step S110: detecting an illegal power failure;
step S120: after illegal power failure is detected, providing power for a functional component by using discharge of a capacitor, forming a power failure command, and sending the power failure command to the functional component;
step S130: the functional component completes a predetermined shutdown operation after receiving the power-down command and within a powering time of the capacitor.
The signal processing method described in this embodiment can be applied to various electronic devices that include or are connected to a functional structure that is sensitive to an illegal power failure.
In this embodiment, there are various ways to detect the illegal power failure, for example, the illegal power failure can be detected by utilizing the signal interaction between the controller, the processor and the power supply structure in the foregoing embodiments. Of course, the detection method of illegal power failure is not limited to the above-mentioned detection method.
When an illegal power failure is detected in step S120, first, power is supplied to the functional part by using the capacitive discharge and at the same time, a power failure command is formed and transmitted to the functional part. The functional unit will start to perform a predetermined shutdown operation after receiving the power-off command.
Therefore, in step S130, the functional unit will complete the predetermined shutdown operation within the power supply time of the capacitor after the power is illegally cut off, for example, execute the legal shutdown sequence according to the legal shutdown procedure, so as to reduce the damage to the functional unit and prolong the service life of the functional unit.
The functional components in this embodiment may be various components sensitive to illegal power failure, and may be, for example, a control structure of a projector. The control structure of the projector can comprise various control chips, such as an embedded control chip or a microprocessor chip or a digital signal chip.
According to the signal processing method, through detection of illegal power failure and generation of the power failure command, damage to the functional components caused by illegal power failure can be well reduced, and the service life of the functional components is prolonged.
Example six:
as shown in fig. 5, the present embodiment provides a signal processing method, including:
step S110: detecting an illegal power failure;
step S120: after illegal power failure is detected, providing power for a functional component by using discharge of a capacitor, forming a power failure command, and sending the power failure command to the functional component;
step S130: the functional component completes a predetermined shutdown operation after receiving the power-down command and within a powering time of the capacitor.
The method comprises the following steps:
and utilizing the first power supply to provide working power supply for the controller forming the power-off command.
In the signal processing method in this embodiment, the first power supply is used to provide the operating power for the controller forming the power-off command. The first power supply may be a power supply as described in the second embodiment, and is a power supply that is independent from the illegal power failure, and the first power supply can maintain power supply for at least a period of time even if the illegal power failure occurs. In this embodiment, the first power supply will provide operating power to the controller so that the controller forms a power-off command.
Of course, the first power supply described in this embodiment may be a power supply inside the controller as disclosed in the foregoing embodiments, or may be a power supply outside the controller. In summary, the first operating power supply can maintain the operating power supply of the controller before the power supply section 110 completes the predetermined shutdown operation.
Example seven:
as shown in fig. 5, the present embodiment provides a signal processing method, including:
step S110: detecting an illegal power failure;
step S120: after illegal power failure is detected, providing power for a functional component by using discharge of a capacitor, forming a power failure command, and sending the power failure command to the functional component;
step S130: the functional component completes a predetermined shutdown operation after receiving the power-down command and within a powering time of the capacitor.
The method further comprises the following steps:
forming a control signal for controlling the conduction of a power supply circuit for supplying power to the functional component from the capacitor;
and controlling the capacitor to conduct a power supply circuit for supplying power to the functional component by using the control signal.
If the capacitor is connected to a power supply circuit of the functional component, if the power supply circuit is provided with a switching element, the switching element is positioned between the capacitor and the functional component; at this time, if it is necessary to ensure the normal power supply of the capacitor to the functional component, the conduction of the power supply circuit needs to be maintained.
In this embodiment, the multiplexing controller is further configured to maintain the conduction of the power supply circuit, for example, the controller inputs a control signal to the switching element to maintain the conduction of the switching element, so as to maintain the conduction of the power supply circuit, in which the capacitor supplies power to the functional component.
Therefore, the functional component can be ensured to obtain the power supply of the capacitor, the legal closing is realized when the preset closing operation is executed, the damage to the functional component is reduced, and the service life of the functional component is prolonged.
Example eight:
as shown in fig. 5, the present embodiment provides a signal processing method, including:
step S110: detecting an illegal power failure;
step S120: after illegal power failure is detected, providing power for a functional component by using discharge of a capacitor, forming a power failure command, and sending the power failure command to the functional component;
step S130: the functional component completes a predetermined shutdown operation after receiving the power-down command and within a powering time of the capacitor.
The functional part includes a control part of the projector;
the step S130 may include:
the functional component completes a projection control shutdown operation after receiving the power-off command and within a power-on time of the capacitor.
In this embodiment, the functional unit includes a projection control unit, the control unit of the projector is used as an illegal shutdown sensitive unit, and when an illegal power failure occurs, the signal processing method described in this embodiment is used to perform signal processing, so that the control unit of the projector can still perform a predetermined shutdown operation by using the discharge of the capacitor after the illegal power failure, thereby reducing the damage to the functional unit caused by the illegal power failure and prolonging the service life of the functional unit.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. An electronic device to which a projector is connected, comprising:
the power supply circuit is connected with the projector and used for supplying power to the projector;
the controller is respectively connected with the projector and the power supply circuit and used for forming a power-off command when illegal power-off is detected and sending the power-off command to the projector;
a capacitor connected to the power supply circuit for supplying power to the projector through at least part of the power supply circuit after an illegal power failure, so that the projector completes a predetermined shutdown operation within a power supply time of the capacitor after receiving the power failure command, wherein the completion of the predetermined shutdown operation includes: and executing a legal shutdown sequence.
2. The electronic device of claim 1,
the electronic device further includes:
and the first power supply is connected with the controller and used for providing working power supply for the controller.
3. The electronic device of claim 1,
the controller is also used for providing a control signal which is kept conducted after the power supply circuit is powered off illegally;
and the capacitor supplies power to the projector when the power supply circuit is conducted.
4. The electronic device of claim 1, 2 or 3,
the power supply circuit is provided with a controlled switch;
the controlled switch includes:
the two connecting ends are respectively connected in the power supply circuit;
the control end is connected with the controller and is used for switching on or switching off the two connecting ends according to a control signal of the controller;
and the capacitor supplies power to the projector through the connecting end.
5. The electronic device of claim 1, 2 or 3,
the capacitance parameter of the capacitor matches an operational electrical parameter required by the projector to perform the predetermined shutdown operation.
6. A method of signal processing, the method comprising:
detecting an illegal power failure;
after illegal power failure is detected, providing power for a projector connected with the electronic equipment by utilizing the discharge of a capacitor of the electronic equipment, forming a power failure command, and sending the power failure command to the projector;
the projector completes a predetermined shutdown operation within a power supply time of the capacitor after receiving the power-off command, wherein the completing the predetermined shutdown operation includes: and executing a legal shutdown sequence.
7. The method of claim 6,
the method comprises the following steps:
and utilizing the first power supply to provide working power supply for the controller forming the power-off command.
8. The method of claim 6,
the method further comprises the following steps:
forming a control signal for controlling the conduction of a power supply circuit for supplying power to the projector by the capacitor;
and controlling the conduction of a power supply circuit for supplying power to the projector by the capacitor by using the control signal.
9. The method of claim 6, 7 or 8,
the projector completes a predetermined shutdown operation after receiving the power-off command and within a power-on time of the capacitor, including:
the projector completes a projection control turn-off operation within a power supply time of the capacitor after receiving the power-off command.
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| US8693276B2 (en) * | 2011-12-28 | 2014-04-08 | Monolithic Power Systems, Inc. | Power supply, associated management unit and method |
| CN102968170A (en) * | 2012-11-28 | 2013-03-13 | 华南理工大学 | Intelligent self-protection power supply for computer |
| CN103345189B (en) * | 2013-07-29 | 2015-11-18 | 浙江中控技术股份有限公司 | A kind of controller and a kind of power-off protection method |
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