TWI638261B - Electronic device with power saving function - Google Patents

Abstract

An electronic device with a power saving function includes a transmission pin, a voltage dividing unit, a detecting unit, a control unit and a switching unit. The transfer pin is adapted to be connected to an external device. The voltage dividing unit is connected to the transmission pin to generate a voltage dividing voltage. The detecting unit is connected to the transmitting pin to detect the voltage state of the divided voltage on the transmitting pin to generate a wake-up signal. The control unit connects the detecting unit and the transmitting pin, detects the connection state of the transmitting pin and the external device, and enters the sleep mode, and receives the wake-up signal to enter the operating mode by the sleep mode, and generates a control signal. The switch unit is connected to the control unit and the transmission pin, and receives a control signal to switch the operation mode of the electronic device having the power saving function.

Description

Electronic device with power saving function

The invention relates to an electronic device, in particular to an electronic device having a power saving function.

As handheld devices (such as mobile phones, tablets, or mobile power supplies) become more powerful, the relative power consumption increases, making the power on handheld devices extremely valuable. In view of this, various manufacturers are dedicated to the power saving function on handheld devices. For example, turn off features that have not been used until they are needed.

However, according to the specifications of the Universal Serial Bus (USB) Type C connector, the handheld device needs to support the Downstream Facing Port (DFP) and the Upstream Facing Port (UFP). When the handheld device is connected to a flash drive or other OTG (On-The-Go) device, the handheld device needs to enter a power mode to provide power to the flash drive or other OTG device. When the handheld device is connected to the power supply, the handheld device needs to switch to the charging mode for charging. Therefore, when the handheld device is idle (ie, when the connector of the handheld device has no external device), there is a fixed power consumption, and it is necessary to switch between the power supply mode and the charging mode, which will cause power consumption.

In view of this, the present invention provides an electronic device having a power saving function, thereby effectively avoiding power consumption when the electronic device is not connected to an external device, to achieve power saving effect, and having a wake-up mechanism for being electronic When the device is connected to an external device, the electronic device is switched from the power saving mode to the operating mode to maintain normal operation.

The invention provides an electronic device with a power saving function, comprising a transmission pin, a voltage dividing unit, a detecting unit, a control unit and a switching unit. The voltage dividing unit is connected to the transmission pin to generate a voltage dividing voltage. The detecting unit is connected to the transmitting pin and detects the voltage state of the transmitting pin to generate a wake-up signal. The control unit is connected to the detecting unit and receives the wake-up signal to generate a control signal. The switch unit is connected to the control unit and the transmission pin, and receives a control signal to switch the operation mode of the electronic device having the power saving function.

The electronic device with the power saving function provided by the embodiment enters the sleep mode by detecting the connection state of the transmission pin and the external device by the control unit, so that the electronic device with the power saving function enters the power saving mode, and A voltage dividing voltage is generated on the transmission pin through the voltage dividing unit as a reference value for whether the transmission pin is connected to the external device, and the detecting unit detects whether the voltage state of the voltage dividing state on the transmission pin changes, A wake-up signal is generated, and then the control unit operates according to the wake-up signal, and generates a corresponding control signal to control the switching unit to switch the operation mode of the electronic device having the power-saving function (such as the charging mode connected to the flash drive or other OTG device or the power supply device) Connected charging mode). In this way, when the electronic device with power saving function is not connected to an external device (such as a flash drive, other OTG device, or power supply device), the control unit switches to the sleep mode and stops operating, and stops the control switch unit from saving power. Switching between the operating modes of the functional electronic device will effectively avoid power consumption and achieve power saving. Moreover, when the external device is connected to the electronic device having the power saving function, the detecting unit detects the voltage change on the transmission pin, and generates a wake-up signal to wake up the control unit to generate a corresponding subsequent operation, so as to save power The functional electronic device returns to normal operation to increase the convenience of use.

The above description of the present invention and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

Certain terms are used throughout the description and claims to refer to particular elements. Those skilled in the art will appreciate that a hardware manufacturer may refer to the same component by a different noun. The scope of the present specification and the patent application do not use the difference in the name as the means for distinguishing the elements, but the difference in function of the elements as the criterion for distinguishing. As used in the specification and the scope of the patent application, "include" is an open term and should be interpreted as "including but not limited to". "Substantially" means that within the range of acceptable errors, those skilled in the art will be able to solve the technical problems within a certain error range, substantially achieving the technical effects. In addition, the term "coupled" is used herein to include any direct and indirect electrical coupling means. Therefore, if a first device is coupled to a second device, the first device can be directly electrically coupled to the second device, or electrically coupled indirectly through other devices or coupling means. Connected to the second device. The description of the specification is intended to be illustrative of the preferred embodiments of the invention. The scope of protection of this application is subject to the definition of the scope of the appended claims.

It is also to be understood that the terms "comprises", "comprising" or "comprising" or any other variations are intended to encompass a non-exclusive inclusion, such that a process, method, article, or Other elements not explicitly listed, or elements that are inherent to such a process, method, commodity, or system. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or system including the element, without further limitation.

In the various embodiments listed below, the same or similar elements or members will be referred to by the same reference numerals.

FIG. 1 is a schematic diagram of an electronic device with a power saving function according to an embodiment of the invention. The electronic device having the power saving function of the embodiment is, for example, a device such as a mobile phone, a tablet computer, or a mobile power source. The electronic device 100 with power saving function includes a transmission pin 110, a voltage dividing unit 120, a detecting unit 130, a control unit 140, and a switching unit 150. In this embodiment, the transmission pin 110 is, for example, a configuration channel pin having a connection terminal of a universal serial bus C-type interface, and an electronic connector with a universal serial bus C-type interface. Device connection.

The transmission pin 110 is adapted to be connected to an external device. Among them, external devices such as a flash drive, other OTG devices, or power supply devices. The voltage dividing unit 120 is connected to the transmission pin 110 to generate a divided voltage. That is to say, the divided voltage generated by the voltage dividing unit 120 is generated on the transmission pin 110, and the voltage value of the divided voltage is, for example, 1.5V.

The detecting unit 130 is connected to the transmitting pin 110 and detects the voltage state of the divided voltage on the transmitting pin 110 to generate a wake-up signal. That is to say, the detecting unit 130 detects whether the voltage state of the divided voltage on the transmitting pin 110 is a change, that is, whether it is a voltage value of the divided voltage. When the voltage state of the divided voltage on the transmission pin 110 is the voltage value of the divided voltage, indicating that the electronic device 100 having the power saving function is not connected to the external device, the detecting unit 130 does not generate the wake-up signal, that is, does not The control unit 140 is awake.

On the other hand, since the electronic device 100 having the power saving function is connected to the external device, the voltage state of the divided voltage on the transmission pin 110 is changed, for example, the voltage value on the transmission pin 110 is higher than the divided voltage. The voltage value or the voltage value lower than the divided voltage. When the voltage state of the divided voltage on the transmission pin 110 is not the voltage value of the divided voltage, indicating that the electronic device 100 having the power saving function has been connected to the external device, the detecting unit 130 generates a wake-up signal, so as to facilitate The control unit 140 performs an operation of waking up.

The control unit 140 connects the detecting unit 130 and the transmitting pin 110, and detects the connection state of the transmitting pin 110 and the external device, thereby entering the sleep mode. In the present embodiment, when the connection state of the transmission pin 110 and the external device is connected, the control unit 140 continues to operate to maintain the normal operation of the electronic device 100 having the power saving function. When the connection state of the transmission pin 110 and the external device is not connected, the control unit 140 enters the sleep mode, for example, so that the electronic device 100 having the power saving function enters the power saving mode to avoid power consumption, thereby achieving power saving. Effect. Further, when the connection state of the transmission pin 110 and the external device is not connected, that is, when the external device is removed by the transmission pin 110, the control unit 140 detects the connection within a preset time (for example, 2 seconds). Whether the state is still not connected; if so, the control unit 140 enters a sleep mode; if not, the control unit 140 maintains normal operation.

In addition, the control unit 140 receives the wake-up signal to enter the operational mode from the sleep mode and generates a control signal. That is, when the control unit 140 does not receive the wake-up signal, indicating that the electronic device 100 having the power saving function is not connected to the external device, the control unit 140 maintains the sleep mode, so that the electronic device 100 having the power saving function still maintains the province. Electrical mode to effectively avoid power consumption.

When the control unit 140 receives the wake-up signal, it indicates that the electronic device 100 having the power saving function has been connected to the external device, and the control unit 140 is woken up to enter the operation mode by the sleep mode, and generates a control signal.

The switch unit 150 is connected to the control unit 140 and the transmission pin 110, and receives a control signal to switch the operation mode of the electronic device 100 having the power saving function, wherein the operation mode is a power supply mode or a charging mode. That is to say, the switch unit 150 can switch between the power supply mode and the charging mode according to the control signal generated by the control unit 140.

For example, when the control unit 140 is woken up, the control unit 140 sequentially generates control signals such as a high logic level and a low logic level, so that the switching unit 150 performs mode switching to be in the power supply mode and the charging mode. Switch between. Then, when the control unit 140 detects that the external device is a flash drive or other OTG device, the control unit 140 maintains the control signal at a high logic level, for example, so that the switch unit 150 switches the electronic device 100 having the power saving function to the power supply. The mode is maintained in the power mode for power supply to external devices. When the control unit 140 detects that the external device is, for example, a power supply device, the control unit 140 maintains the control signal at a low logic level, for example, so that the switch unit 150 switches the electronic device 100 having the power saving function to the charging mode and maintains the charging. Mode to receive power from an external device for charging.

In this way, when the electronic device 100 having the power saving function is not connected to the external device, the control unit 140 switches to the sleep mode and stops the operation, and stops the operation mode of the control device 150 for the electronic device 100 having the power saving function. Switching will effectively avoid power consumption and achieve power saving. Moreover, after the control unit 140 enters the sleep mode, the detecting unit 130 continuously detects the voltage state of the divided voltage on the transmission pin 110. When the external device is connected to the electronic device 100 having the power saving function, the detecting unit 130 detects the voltage change on the transmitting pin 110, and generates a wake-up signal to wake up the control unit 140 to generate a corresponding subsequent operation, so that The power saving function electronic device 100 returns to normal operation.

In addition, the voltage dividing unit 120 includes a first resistor R1 and a second resistor R2. The first resistor R1 has a first end and a second end. The first end of the first resistor R1 is connected to the first voltage, and the second end of the first resistor R1 is connected to the transmission pin 110 and generates a divided voltage. The second resistor R2 has a first end and a second end. The first end of the second resistor R2 is connected to the second end of the first resistor R1, and the second end of the second resistor R2 is connected to the ground end.

Further, the switching unit 150 includes a first transistor M1, a third resistor R3, a second transistor M2, and a fourth resistor R4. The first transistor M1 has a first end, a second end and a third end. The first end of the first transistor M1 is connected to the second voltage, and the second end of the first transistor M1 is connected to the control unit 140. The third resistor R3 has a first end and a second end. The first end of the third resistor R3 is connected to the third end of the first transistor M1, and the second end of the third resistor R3 is connected to the transmission pin 110.

The second transistor M2 has a first end, a second end and a third end. The first end of the second transistor M2 is connected to the ground end, and the second end of the second transistor M2 is connected to the control unit 140. The fourth resistor R4 has a first end and a second end. The first end of the fourth resistor R4 is connected to the third end of the second transistor M2, and the second end of the fourth resistor R4 is connected to the second end of the third resistor R3.

In this embodiment, the first transistor M1 is, for example, a P-type transistor, wherein the first end of the first transistor M1 is the source end of the P-type transistor, and the second end of the first transistor M1 is The gate end of the P-type transistor, the third end of the first transistor M1 is the drain of the P-type transistor (Drain). In addition, the second transistor M2 is, for example, an N-type transistor, wherein the first end of the second transistor M2 is the 汲 terminal of the N-type transistor, and the second end of the second transistor M2 is the gate terminal of the N-type transistor. The third end of the second transistor M2 is the source terminal of the N-type transistor.

In this embodiment, the resistance values of the first resistor R1 and the second resistor R2 in the voltage dividing unit 120 are much larger than the resistance values of the third resistor R3 and the fourth resistor R4 in the switching unit 150, so as not to affect The normal operation of the electronic device 100 having the power saving function. Further, the larger the resistance value of the first resistor R1 and the second resistor R2, the more power-saving the electronic device 100 having the power saving function.

In summary, the electronic device with the power saving function disclosed in the embodiment of the present invention enters the sleep mode by detecting the connection state of the transmission pin and the external device by the control unit, so that the electronic device with the power saving function enters the province. In the electrical mode, a voltage dividing voltage is generated on the transmission pin through the voltage dividing unit as a reference value for whether the transmission pin is connected to the external device, and the detection unit detects the voltage state of the voltage dividing state on the transmission pin. Whether to change to generate a wake-up signal, then the control unit operates according to the wake-up signal, and generates a corresponding control signal to control the switching unit to switch the operation mode of the electronic device having the power-saving function (such as the charging mode connected to the flash drive or other OTG device) Or charging mode connected to the power supply unit). In this way, when the electronic device with power saving function is not connected to the external device (such as a flash drive, other OTG device or power supply device), the control unit will switch to the sleep mode and stop the operation, and stop the control switch unit to save power. Switching between the operating modes of the functional electronic device will effectively avoid power consumption and achieve power saving. Moreover, when the external device is connected to the electronic device having the power saving function, the detecting unit detects the voltage change on the transmission pin, and generates a wake-up signal to wake up the control unit to generate a corresponding subsequent operation, so as to save power The functional electronic device returns to normal operation to increase the convenience of use.

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

100‧‧‧Electronic devices with power saving function

110‧‧‧Transfer pins

120‧‧‧Voltage unit

130‧‧‧Detection unit

140‧‧‧Control unit

150‧‧‧Switch unit

R1‧‧‧first resistance

R2‧‧‧second resistance

R3‧‧‧ third resistor

R4‧‧‧fourth resistor

M1‧‧‧first transistor

M2‧‧‧second transistor

The drawings are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawings: FIG. 1 is a schematic diagram of an electronic device with a power saving function according to an embodiment of the invention.

Claims (5)

An electronic device with a power saving function, comprising: a transmission pin adapted to be connected to an external device; a voltage dividing unit connected to the transmission pin to generate a voltage dividing voltage; and a detecting unit connected to the transmission connection a foot detecting a voltage state of the divided voltage on the transmitting pin to generate a wake-up signal; a control unit connecting the detecting unit and the transmitting pin to detect the transmitting pin and the external device a connection state, according to which a sleep mode is entered, and the wake-up signal is received to enter an operation mode by the sleep mode, and a control signal is generated; and a switch unit is connected to the control unit and the transmission pin to receive the Controlling signals to switch the operation mode of the electronic device having the power saving function. The electronic device with power saving function as claimed in claim 1, wherein the transmission pin is a configuration channel pin. The electronic device with the power saving function of claim 1, wherein the voltage dividing unit comprises: a first resistor having a first end and a second end, the first end of the first resistor being connected to the first end a second end of the first resistor connected to the transmission pin and generating the divided voltage; and a second resistor having a first end and a second end, the first end of the second resistor Connecting the second end of the first resistor, the second end of the second resistor is connected to a ground. The electronic device with the power saving function of claim 1, wherein the switch unit comprises: a first transistor having a first end, a second end and a third end, the first transistor The first end is connected to a second voltage, the second end of the first transistor is connected to the control unit; a third resistor has a first end and a second end, and the first end of the third resistor is connected The second end of the first transistor is connected to the transmission pin; the second transistor has a first end, a second end and a third end, the first end The first end of the second transistor is connected to a ground end, the second end of the second transistor is connected to the control unit; and a fourth resistor has a first end and a second end, the fourth resistor The first end is connected to the third end of the second transistor, and the second end of the fourth resistor is connected to the two ends of the third resistor. An electronic device having a power saving function according to claim 4, wherein the first transistor is a P-type transistor, and the second transistor is an N-type transistor.