CN109638912B - Charging indicating device and terminal - Google Patents
Charging indicating device and terminal Download PDFInfo
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- CN109638912B CN109638912B CN201811558366.5A CN201811558366A CN109638912B CN 109638912 B CN109638912 B CN 109638912B CN 201811558366 A CN201811558366 A CN 201811558366A CN 109638912 B CN109638912 B CN 109638912B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
Abstract
The invention discloses a charging indicating device and a terminal, wherein the charging indicating device comprises a control switch, a light-emitting unit, a power supply unit and a control interface connected with the charging device; the control interface is used for controlling the control switch to be switched on or switched off, and the power supply unit is used for supplying power to the light-emitting unit; the control switch comprises a first control switch, a second control switch and a third control switch; the control interface comprises a first control interface, a second control interface and a third control interface; the first control interface and the third control interface are respectively connected with the first control switch; the second control interface is connected with the second control switch; the first control switch, the second control switch and the third control switch are connected with the light-emitting unit, and the second control switch and the third control switch are grounded, so that the problems of complex control process and high cost in the existing charging indication are solved.
Description
Technical Field
The invention relates to the field of terminals, in particular to a charging indicating device and a terminal.
Background
At present, various electronic devices are increasing, and the electronic devices are generally powered by batteries for the purpose of portability. The battery is a rechargeable secondary battery, which requires frequent recharging of the battery of the electronic device.
When the battery is charged, the charging state of the battery should be indicated no matter the electronic device is in a shutdown state or a startup state, and in the existing charging indication, the charging conditions are different when the electronic device is charged in a startup state and a shutdown state, so that the startup charging and the shutdown charging need to be designed separately, for example, when the electronic device is charged in a shutdown state, the charging IC is used more accurately, and the charging IC is continuously used for controlling to indicate the charging state of the battery; when starting up and charging, indicating the charging state of the battery by using a voltage detection scheme; the separate indication of charging when starting up and charging when shutting down leads to a complex control process and high cost.
Disclosure of Invention
The invention aims to solve the technical problems of complex control process and high cost caused by independent startup charging indication and shutdown charging indication in the existing charging indication; to solve the technical problem, the charging indicating device and the terminal are provided.
In order to solve the above technical problem, the present invention provides a charging indicating device, including: the charging device comprises a control switch, a light-emitting unit, a power supply unit and a control interface connected with the charging device; the control interface is used for controlling the on-off of the control switch, and the power supply unit is connected with the light-emitting unit and used for supplying power to the light-emitting unit;
the control switch comprises a first control switch, a second control switch and a third control switch; the control interface comprises a first control interface, a second control interface and a third control interface;
the first control interface and the third control interface are respectively connected with the first control switch;
the second control interface is connected with the second control switch;
the first control switch, the second control switch and the third control switch are connected with the light-emitting unit, and the second control switch and the third control switch are all grounded.
Optionally, the control switch includes a control end, a first conducting end and a second conducting end; the light emitting unit comprises a first light emitting unit and a second light emitting unit, and the first light emitting unit is different from the second light emitting unit;
the first control interface is connected with the control end of the first control switch; the third control interface is connected with the second conduction end of the first control switch;
the second control interface is connected with the control end of the second control switch;
the first conduction end of the first control switch and the first conduction end of the second control switch are connected with the control end of the third control switch;
the first conducting end of the first control switch and the first conducting end of the second control switch are connected with the first light-emitting unit, and the first conducting end of the third control switch is connected with the second light-emitting unit.
Optionally, when the terminal including the charging device is powered on to charge, the first control interface connected to the charging device is at a low level, and controls the first control switch to be turned off;
when the terminal is powered off and charged, the first control interface is at a high level and controls the first control switch to be conducted.
Optionally, when the terminal is powered on for charging and the charging voltage of the terminal is less than the preset voltage value, the second control interface is at a high level, the second control switch is controlled to be turned on, and the second light-emitting unit emits light; the control end of the third control switch is in low level, the third control switch is controlled to be cut off, and the first light-emitting unit does not emit light.
Optionally, the charging voltage of the terminal is greater than the preset voltage value, the second control interface is at a low level, the second control switch is controlled to be turned off, and the second light-emitting unit does not emit light; the control end of the third control switch is at a high level, the third control switch is controlled to be conducted, and the first light-emitting unit emits light.
Optionally, when the terminal is powered off and charged and the charging voltage of the terminal is smaller than the preset voltage value, the second control interface is at a high level to control the second control switch to be turned on, and the second light-emitting unit emits light; the third control interface is in a low level, the control end of the third control switch is in a low level, the third control switch is controlled to be turned off, and the first light-emitting unit does not emit light.
Optionally, when the charging voltage of the terminal is greater than the preset voltage value, the second control interface is at a low level, the second control switch is controlled to be turned off, and the second light-emitting unit does not emit light; the third control interface is in a high-voltage state, the control end of the third control switch is in a high level, the third control switch is controlled to be conducted, and the first light-emitting unit emits light.
Optionally, the control switch further includes a fourth control switch, the control interface further includes an enable interface, and the second control switch and the third control switch are grounded through the fourth control switch; the enable interface is connected with the control end of the fourth control switch, and the first conduction end of the fourth control switch is connected with the second conduction end of the second control switch and the second conduction end of the third control switch;
when the charging temperature of the terminal is higher than the preset temperature threshold value, the enabling interface is at a low level, the fourth control switch is controlled to be cut off, and the first light-emitting unit and the second light-emitting unit do not emit light.
Optionally, the first control switch, the second control switch, and the third control switch include an N-channel MOS transistor; the light emitting unit includes an LED.
Further, the invention also provides a terminal, which comprises the charging indicating device and a charging device.
Advantageous effects
The invention provides a charging indicating device and a terminal, aiming at the problems of complicated control process and high cost caused by independent starting charging indication and shutdown charging indication in the existing charging indication, the charging indicating device comprises a control switch, a light-emitting unit, a power supply unit and a control interface connected with a charging device; the control interface is used for controlling the on-off of the control switch, and the power supply unit is connected with the light-emitting unit and used for supplying power to the light-emitting unit; the control switch comprises a first control switch, a second control switch and a third control switch; the control interface comprises a first control interface, a second control interface and a third control interface; the first control interface and the third control interface are respectively connected with the first control switch; the second control interface is connected with the second control switch; the first control switch, the second control switch and the third control switch are connected with the light-emitting unit, and the second control switch and the third control switch are both grounded, namely, the invention realizes the indication of on-off charging and shutdown charging through the charging indication device connected with the charging device, and uses discrete devices, thereby effectively reducing the cost, being applicable to different battery types and improving the satisfaction degree of users.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
fig. 1 is a schematic diagram of a hardware structure of an alternative mobile terminal for implementing various embodiments of the present invention;
fig. 2 is a schematic view of a charge indication device according to a first embodiment of the present invention;
fig. 3 is a schematic view of another charge indicating device according to a first embodiment of the present invention;
fig. 4 is a schematic view of a charging indication apparatus according to a first embodiment of the present invention;
fig. 5 is a schematic view of a charge indicating device according to a second embodiment of the present invention;
fig. 6 is a schematic view of another charge indicating device according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal according to a third embodiment of the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "part", or "unit" used to indicate elements are used only for facilitating the description of the present invention, and have no particular meaning in themselves. Thus, "module", "component" or "unit" may be used mixedly.
The terminal may be implemented in various forms. For example, the terminal described in the present invention may include mobile terminals such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and fixed terminals such as a Digital TV, a desktop computer, and the like.
The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.
Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, and that a mobile terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
The following specifically describes the components of the mobile terminal with reference to fig. 1:
the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).
WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.
The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, and the Graphics processor 1041 processes image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the luminosity of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or the backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, can collect touch operations of a user (e.g., operations of a user on the touch panel 1071 or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory) thereon or nearby and drive the corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.
The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, etc. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.
Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.
Based on the above mobile terminal hardware structure, embodiments of the present invention are provided.
First embodiment
In order to solve the problems of complicated control process and high cost caused by separate start-up charging indication and shutdown charging indication in the existing charging indication, the present embodiment provides a charging indication device, where the charging indication device is used for indicating the charging state of a terminal, and certainly, the terminal includes a charging indication device and a charging device, the charging indication device is connected with the charging device, and here, the description of the charging device is not limited. As shown in fig. 2, the charging instruction device includes a control switch 201, a light-emitting unit 202, a power supply unit 203, and a control interface 204 connected to the charging device. The control interface 204 is used for controlling the switch 201 to be turned on or turned off, that is, the control interface 204 is connected with the control switch 201; the power supply unit 203 is connected to the light emitting unit 202, and is used for supplying power to the light emitting unit 202.
In the present embodiment, as shown in fig. 2, the control switch 201 includes a first control switch 2011, a second control switch 2012 and a third control switch 2013, and the control interface 204 includes a first control interface 2041, a second control interface 2042 and a third control interface 2043. The first control interface 2041 and the third control interface 2043 are respectively connected to the first control switch 2011, the second control interface 2042 is connected to the second control switch 2012, and the first control switch 2011, the second control switch 2012 and the third control switch 2013 are connected to the light-emitting unit 202; it is noted that the first control switch 2011 is connected to the second control switch 2012, the second control switch 2012 is connected to the third control switch 2013, and both the second control switch 2012 and the third control switch 2013 are grounded. It should be understood that the first control switch 2011 is controlled to be turned on or off by the first control interface 2041 in the present embodiment; the second control interface 2042 controls the second control switch 2012 to be turned on or off, and further causes the third control switch 2013 to be turned on or off due to the first control switch 2011 and/or the second control switch 2012 being turned on or off. When the first control switch 2011 is turned off, for example, the third control switch 2013 is turned off because the second control switch 2012 is turned on; when the first control switch 2011 is turned on, the second control switch 2012 is turned off, so that the third control switch 2013 is turned on.
As shown in fig. 3, the control switch 201 includes a control terminal (e.g. labeled "1" in fig. 3), a first conducting terminal (e.g. labeled "3" in fig. 3), and a second conducting terminal (e.g. labeled "2" in fig. 3), i.e. the first control switch 2011, the second control switch 2012, and the third control switch 2013 each include a control terminal, a first conducting terminal, and a second conducting terminal; the light emitting unit 202 includes at least one light emitting unit, and the embodiment is described by taking the case that the light emitting unit includes a first light emitting unit 2021 and a second light emitting unit 2022, and the first light emitting unit 2021 is different from the second light emitting unit 2022, for example, the light emitting color is different, and the light emitting luminosity is different. When the first control interface 2041 and the third control interface 2043 are respectively connected to the first control switch 2011, the first control switch 2011 is further connected to the second control switch 2012, specifically, the first control interface 2041 is connected to the control end of the first control switch 2011, the third control interface 2043 is connected to the second conducting end of the first control switch 2011, and the first conducting end of the first control switch 2011 is connected to the first conducting end of the second control switch 2012. The second control interface 2042 is connected to the second control switch 2012, and the second control switch 2012 is further connected to the third control switch 2013, which specifically includes: the second control interface 2042 is connected to the control end of the second control switch 2012, and the second conducting end of the second control switch 2012 is connected to the second conducting end of the third control switch 2013. The first conducting end of the first control switch 2011 and the first conducting end of the second control switch 2012 are further connected to the control end of the third control switch 2013, the first conducting end of the first control switch 2011 and the first conducting end of the second control switch 2012 are connected to the first light-emitting unit 2021, and the first conducting end of the third control switch 2013 is connected to the second light-emitting unit 2022.
It should be noted that the charging indication device provided in this embodiment can implement the terminal switch charging indication and the shutdown charging indication. Specifically, when the terminal including the charging device is powered on for charging, due to the circuit connection in the charging device, the first control interface 2041 connected to the charging device is at a low level, and due to the connection of the first control interface 2041 and the control end of the first control switch 2011, the control end of the first control switch 2011 is further at a low level, so as to control the first conducting end and the second conducting end of the first control switch 2011 to be disconnected, so that the first control switch 2011 is further disconnected; therefore, when the terminal is powered off and charged, the first control interface 2041 is at a high level, and the first conducting terminal and the second conducting terminal of the first control switch 2011 are connected, so that the first control switch 2011 is turned on. When the first control switch 2011 is turned on, the third control interface 2043 is connected to the second conducting end of the first control switch 2011, and thus the third control interface 2043 is connected to the first conducting end of the second control switch 2012 and connected to the control end of the third control switch 2013.
When the terminal is powered on and charged, the first control switch 2011 is turned off, at this time, if the charging voltage of the terminal is less than the preset voltage value, for example, 4.2V, the first control interface 2042 is at a high level, and then the control end of the second control switch 2012 connected to the first control interface 2042 is at a high level, the first conducting end and the second conducting end of the second control switch 2012 are in conducting connection, so that the second control switch 2012 is conducted, and the second light-emitting unit 2022 emits light. Specifically, since the second control switch 2012 is turned on, the second control switch 2012 is equivalent to a conducting wire, so that the current flows from the power unit 203 to the first light-emitting unit 2021, and then flows to the second control switch 2012 and is grounded, so that the first light-emitting unit 2021 emits light; since the second control switch 2012 is equivalent to a conducting wire, the current flows to the second control switch 2012 but does not flow to the control end of the third control switch 2013, so that the control end of the third control switch 2013 is at a low level, the first conducting end and the second conducting end of the third control switch 2013 are disconnected, so that the third control switch 2013 is turned off, and therefore, the current flows from the power supply unit to the second light-emitting unit 2022 and flows to the third control switch 2013, and the second light-emitting unit 2022 does not emit light because the third control switch 2013 is turned off.
When the terminal is powered on for charging and the charging voltage of the terminal is greater than the preset voltage value, constant voltage charging is performed, the first control interface 2042 is at a low level, so that the second control switch 2012 is turned off, current flows from the power supply unit to the first light emitting unit 2021 and then flows to the second control switch 2012, and the first light emitting unit 2021 does not emit light due to the turn-off of the second control switch 2012. Since the current does not flow to the second control switch 2012 any more, the current of the first light-emitting unit 2021 flows to the control end of the third control switch 2013, and the first conducting end and the second conducting end of the third control switch 2013 are conducted, so that the third control switch 2013 is equivalent to a conducting wire, the power current flows to the second light-emitting unit 2022, and then flows to the third control switch 2013 and is grounded, so that the second light-emitting unit 2022 emits light. It is understood that when the charging is fully turned off, the first control interface 2042 is at a low level, so that the second control switch 2012 is turned off, and the first light-emitting unit 2021 does not emit light; the control end of the third control switch 2013 is at a high level, so that the third control switch 2013 is turned on and the second light-emitting unit 2022 emits light.
When the terminal is powered off and charged, and the charging voltage of the terminal is less than the preset voltage value, the first control interface 2042 is at a high level, the first conducting end and the second conducting end of the second control switch 2012 are in conducting connection, so that the second control switch 2012 is conducted, the first light-emitting unit 2021 emits light, the current flows from the power supply unit to the first light-emitting unit 2021, and then flows to the second control switch 2012 to be grounded, so that the first light-emitting unit 2021 emits light. As the first control switch 2011 is turned on, the third control interface 2043 is connected to the first on end of the second control switch 2012 and connected to the control end of the third control switch 2013; when the charging voltage is greater than the preset voltage threshold, the third control interface 2043 is at a low level, and further the control end of the third control switch 2013 connected to the third control interface 2043 is at a low level, so that the first conducting end and the second conducting end of the third control switch 2013 are cut off, and thus the current flows from the power supply unit to the second light-emitting unit 2022 and flows to the third control switch 2013, and the second light-emitting unit 2022 does not emit light because the third control switch 2013 is cut off.
When the terminal is powered off and charged, and the charging voltage of the terminal is greater than the preset voltage value, constant voltage charging is performed, the first control interface 2042 is at a low level, so that the second control switch 2012 is turned off, current flows from the power supply unit to the first light-emitting unit 2021, and then flows to the second control switch 2012, and the first light-emitting unit 2021 does not emit light because the second control switch 2012 is turned off. When the charging voltage is greater than the preset voltage threshold, the third control interface 2043 is in a high impedance state, and the control end of the third control switch 2013 connected to the third control interface 2043 is in a high level, so that the first conducting end and the second conducting end of the third control switch 2013 are conducted, the third control switch 2013 is equivalent to a conducting wire, and thus, the current flows from the power supply unit to the second light-emitting unit 2022, flows to the third control switch 2013, is grounded, and the second light-emitting unit 2022 emits light. It is understood that when the charging is fully turned off, the first control interface 2042 is at a low level, so that the second control switch 2012 is turned off, and the first light-emitting unit 2021 does not emit light; the third control interface 2043 is in a high impedance state, and the control terminal of the third control switch 2013 is in a high level, so that the third control switch 2013 is turned on, and the second light-emitting unit 2022 emits light.
It should be noted that, as shown in fig. 4, the control switch 204 of the present embodiment further includes a fourth control switch 2014, the control interface further includes an enable interface 2043, the second control switch 2012 and the third control switch 2013 are grounded via the fourth control switch 2014, the enable interface 2043 is connected to the control end of the fourth control switch 2014, and a second conducting end of the fourth control switch 2014 is connected to the first conducting ends of the first control interface 2042 and the third control interface 2043. When the charging temperature of the terminal is higher than the preset threshold, the enable interface 2043 is at a low level, so that the fourth control switch 2014 is turned off, no matter how the currents of the first light-emitting unit 2021 and the second light-emitting unit 2022 flow, the currents finally flow to the fourth control switch 2014, and since the fourth control switch 2014 is turned off, the currents cannot flow to the ground terminal, so that the first light-emitting unit 2021 and the second light-emitting unit 2022 do not emit light. Of course, when the charging temperature of the terminal is lower than the preset threshold, the enable interface 2043 is at a high level, and the fourth control switch 2014 is turned on, at this time, the second control switch 2012 and the third control switch 2013 are grounded through the fourth control switch 2014.
The embodiment provides a charging indicating device for indicating a charging state, which comprises a control switch, a light-emitting unit, a power supply unit and a control interface connected with the charging device; the control interface is used for controlling the on-off of the control switch, and the power supply unit is connected with the light-emitting unit and used for supplying power to the light-emitting unit; the control switch comprises a first control switch, a second control switch and a third control switch; the control interface comprises a first control interface, a second control interface and a third control interface; the first control interface and the third control interface are respectively connected with the first control switch; the second control interface is connected with the second control switch; the first control switch, the second control switch and the third control switch are connected with the light-emitting unit, and the second control switch and the third control switch are both grounded, namely, the invention realizes the indication of on-off charging and shutdown charging through the charging indication device connected with the charging device, and uses discrete devices, thereby effectively reducing the cost, being applicable to different battery types and improving the satisfaction degree of users.
Second embodiment
For better understanding of the present invention, the present embodiment is described with a more specific example, as shown in fig. 5, and in some embodiments, the charge indication device is shown in fig. 6. The present embodiment is described with reference to fig. 5, which illustrates a charging instruction device, including a control switch unit, a light-emitting unit, a power supply unit, and a control interface connected to the charging device. The control interface is used for controlling the switch unit to be switched on or switched off, namely the control interface is connected with the control switch unit; the power supply unit is connected with the light-emitting unit and used for supplying power to the light-emitting unit, the control switch comprises an NMOS tube and specifically comprises a first control switch (VT2), a second control switch (VT6), a third control switch (VT8) and a fourth control switch (VT7), the light-emitting unit comprises a green light-emitting LED and a red light-emitting LED, and the power supply unit comprises 5V voltage. In this embodiment, the resistance dimmer is connected in series before the power supply and the LED, and the current in the LED is adjusted by changing the resistance value, thereby achieving the purpose of dimming. As shown in fig. 5 or fig. 6, in order to facilitate understanding, the present embodiment sets the control terminal of the control switch to the reference numeral "1", the first conduction terminal to the reference numeral "3", and the second conduction terminal to the reference numeral "2".
The control interface in this embodiment includes a first control interface (S1_ ON _ N), a second control interface (CHRG _ FULL _ N), a third control interface (CHRG _ B), and an enable interface (CHEG _ EN), where the first control interface (S1_ ON _ N) is an output interface of a first charging chip (e.g., LP78071 chip) in the charging device, the second control interface (CHRG _ FULL _ N) is an output interface of a second charging chip (e.g., LMC7215IMS chip) in the charging device, and the third control interface (CHRG _ B) and the enable interface (CHEG _ EN) are output interfaces of the first charging chip (e.g., LP78071 chip) in the charging device.
It should be noted that the first control interface (S1_ ON _ N) in this embodiment is connected to the control terminal (gate) of the first control switch (VT2), and the third control interface (CHRG _ B) is connected to the second conduction terminal (source) of the first control switch (VT 2); a resistor of 10k (OHM) is connected in series between the first control interface (S1_ ON _ N) and the second pass end (source) of the first control switch (VT2), and a resistor of 0(OHM) is connected in series between the third control interface (CHRG _ B) and the second pass end (source) of the first control switch (VT 2).
The second control interface (CHG _ FULL _ N) is connected to the control terminal (gate) of the second control switch (VT6) via a 10K (ohm) resistor, a 100K resistor is connected in series between the control terminal (gate) and the second conduction terminal (source) of the second control switch (VT6), the first conduction terminal (drain) of the second control switch (VT6) is connected to the first conduction terminal (drain) of the first control switch (VT2) and is connected to the red-emitting LED, the first conduction terminal (drain) of the second control switch (VT6) is further connected to the control terminal (gate) of the third control switch (VT8), the first conduction terminal (drain) of the third control switch (VT8) is connected to the green-emitting LED, the second conduction terminal (source) of the third control switch (8) is connected to the second conduction terminal (VT6), the second conduction terminal (source) of the third control switch (VT 3876) is connected to the control terminal (gate) of the second control switch (VT 36 8), and the third conduction terminal (drain) is connected to the control terminal (drain) of the second control switch (VT 35 8) ) A69.8K resistor was also connected in series.
The enable interface (CHEG _ EN) is connected with the control end (gate) of the fourth control switch (VT7) through a resistor of 10K (ohm), a resistor of 100K is connected in series before the control end (gate) of the fourth control switch (VT7) and the second conduction end (source) of the fourth control switch, the second conduction end (source) of the fourth control switch (VT7) is grounded, and the first conduction end (drain) is connected with the second conduction end (source) of the third control switch (VT8) and the second conduction end (source) of the second control switch (VT 6).
When the terminal comprising the charging device is started to charge, the first control interface (S1_ ON _ N) is at a low level, and the first control switch (VT2) is turned off; at this time, when the power voltage of the terminal is less than 4.2V, the second control interface (CHG _ FULL _ N) is at a high level, so that the second control switch (VT6) is turned on, and current flows from the power unit to the red light emitting LED to the second control switch (VT6) and then to the fourth control switch (VT7) to ground, so that the LED emits red light. In the embodiment, when the charging temperature of the terminal is lower than the preset temperature value, the enable interface (CHEG _ EN) is at a high level, so that the fourth control switch (VT7) is turned on, and therefore, the current can flow from the second control switch (VT6) to the fourth control switch (VT7) and then to the ground; however, when the charging temperature of the terminal is higher than the preset temperature value, the enable interface (CHEG _ EN) is at a low level, the fourth control switch (VT7) is turned off, and no matter how the current flows, the current cannot flow to the ground terminal, and thus neither the red LED nor the green LED can emit light. Since the second control switch (VT6) is turned on and then corresponds to a wire, the current flows to the second control switch (VT6) but cannot flow to the control terminal (gate) of the third control switch (VT8), so that the control terminal (gate) of the third control switch (VT8) is at a low level, the third control switch (VT8) is turned off, and thus the current flows from the power supply unit to the green-emitting LED and flows to the third control switch (VT8), and the green-emitting LED does not emit light because the third control switch is turned off (VT 8).
When the power supply voltage is more than 4.2V, the terminal is charged at a constant voltage, the second control interface (CHG _ FULL _ N) is at a low level, the second control switch (VT6) is switched off, current flows to the LED which emits red light at the moment, the current flows to the second control switch (VT6) and is switched off, and the LED does not emit red light; since the second control switch (VT6) is turned off, the current flows to the control terminal (gate) of the third control switch (VT8), and then the control terminal (gate) of the third control switch (VT8) is at a high level, the third control switch (VT8) is turned on, and then the current flows from the power supply unit to the green-emitting LED to the third control switch (VT8), and then to the fourth control switch (VT7) and to ground, so that the LED emits green light. Therefore, when the power supply voltage is less than 4.2V during starting up and charging, the red light emits light, and the green light does not emit light; when the power supply voltage is more than 4.2V, the red lamp does not emit light, and the green lamp emits light. It will be appreciated that when the supply voltage is greater than 4.2V and the charge is cut off, the red lamp does not emit light and the green lamp emits light.
When the terminal including the charging device is turned off for charging, the first control interface (S1_ ON _ N) is at a high level (e.g., S1_ ON _ N is 5.3V), and the first control switch (VT2) is turned ON; when the power supply voltage is less than 4.2V, the second control interface (CHG _ FULL _ N) is at a high level, so that the second control switch (VT6) is turned on, and current flows from the power supply unit to the red light emitting LED to the second control switch (VT6), and then flows to the fourth control switch (VT7) and is grounded, so that the LED emits red light; as the first control switch (VT2) is turned on, the third control interface (CHRG _ B) is connected to the control terminal (gate) of the third control switch (VT 8); when the charging voltage is less than the preset voltage threshold, the third control interface (CHRG _ B) is at a low level, and further the control terminal of the third control switch (VT8) is at a low level, the third control switch (VT8) is turned off, so that current flows from the power supply unit to the LED emitting green light and flows to the third control switch (VT8), and the LED does not emit green light because the third control switch (VT8) is turned off.
When the charging voltage is greater than 4.2V, the second control interface (CHG _ FULL _ N) is at a low level, so that the second control switch (VT6) is turned off, and thus current flows from the power supply unit to the red light emitting LED to the second control switch (VT6), and the red light emitting LED is not emitted due to the second control switch (VT6) being turned off. Meanwhile, when the charging voltage is greater than 4.2V, the third control interface (CHRG _ B) is in a high-impedance state, the control terminal (gate) of the third control switch (VT8) connected with the third control interface (CHRG _ B) is in a high level, and then the third control switch (VT8) is turned on, and current flows to the green-emitting LED, then flows to the third control switch (VT8), and then flows out of the fourth control switch (VT7) and is grounded, so that the LED emits green light. Therefore, when the power supply voltage is less than 4.2V during shutdown charging, the red lamp emits light, and the green lamp does not emit light; when the power supply voltage is more than 4.2V, the red lamp does not emit light, and the green lamp emits light. It is understood that when the power supply voltage is greater than 4.2V and the charge is cut off, the red light is not illuminated and the green light is illuminated.
In order to better understand the present invention, the present embodiment describes the charge indicating device with a specific example; when the charging is turned ON, S1_ ON _ N is 0, VT2 is off, VBAT (power supply voltage) < 4.2V: CHG _ FULL _ N is 1, VT6 is on; the control end 1 of the VT8 is equal to 0, and the VT8 is cut off; the red light is luminous, and the green light is not luminous; VBAT >4.2V, enter constant voltage charging: CHG _ FULL _ N is 0, VT6 is off; the control end 1 of the VT8 is 1, and the VT8 is turned on; the red light does not emit light, and the green light emits light; when the charging is turned off, S1_ ON _ N is 5.3V, VT2 is ON, VBAT < 4.2V: CHG _ FULL _ N is 1, VT6 is on; CHRG _ B is 0; the control end 1 of the VT8 is 0, and the VT8 is cut off; the red light emits light, and the green light does not emit light; VBAT >4.2V, charge cutoff: CHG _ FULL _ N is 0, VT6 is off; CHRG _ B is high impedance; the control end 1 of the VT8 is 1, and the VT8 is turned on; the red light does not emit light, and the green light emits light; too high charging temperature: CHRG _ EN is 0, VT7 is off, red is not illuminated, and green is not illuminated. The charging indicating device of the embodiment realizes the indication of starting charging and shutdown charging, uses discrete devices, effectively reduces the cost, is suitable for different battery types, and improves the satisfaction degree of users.
Third embodiment
The present embodiment further provides a terminal, as shown in fig. 7, the terminal includes a charging indication device 701 and a charging device 702, and the charging indication device 701 is used for indicating a charging state of the charging device 702.
The charging indication device 701 is described in the above embodiments, and is not described in detail herein.
It is to be noted that, in order to avoid redundant description, all examples of the first embodiment and the second embodiment are not fully set forth in the present embodiment, and it should be clear that all examples of the first embodiment and the second embodiment are applicable to the present embodiment.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A charge indication device, comprising: the charging device comprises a control switch, a light-emitting unit, a power supply unit and a control interface connected with the charging device; the control interface is used for controlling the control switch to be switched on or switched off, and the power supply unit is connected with the light-emitting unit and used for supplying power to the light-emitting unit;
the control switch comprises a control end, a first conducting end and a second conducting end; the light emitting unit comprises a first light emitting unit and a second light emitting unit, and the first light emitting unit is different from the second light emitting unit;
the first control interface is connected with the control end of the first control switch; the third control interface is connected with the second conduction end of the first control switch;
the second control interface is connected with the control end of the second control switch;
the first conducting end of the first control switch and the first conducting end of the second control switch are connected with the control end of the third control switch;
the first conducting end of the first control switch and the first conducting end of the second control switch are connected with the first light-emitting unit, and the first conducting end of the third control switch is connected with the second light-emitting unit;
the control switch comprises a first control switch, a second control switch and a third control switch; the control interface comprises a first control interface, a second control interface and a third control interface;
the first control interface and the third control interface are respectively connected with the first control switch;
the second control interface is connected with the second control switch;
the first control switch, the second control switch and the third control switch are all connected with the light-emitting unit, and the second control switch and the third control switch are all grounded;
when a terminal comprising the charging device is started to charge, a first control interface connected with the charging device is at a low level, and the first control switch is controlled to be switched off;
when the terminal is powered off and charged, the first control interface is at a high level and controls the first control switch to be conducted.
2. The charge indicator according to claim 1, wherein when the terminal is powered on for charging and the charging voltage of the terminal is less than a preset voltage value, the second control interface is at a high level to control the second control switch to be turned on, and the second light-emitting unit emits light; and the control end of the third control switch is at a low level, the third control switch is controlled to be switched off, and the first light-emitting unit does not emit light.
3. The charge indicator of claim 2, wherein the charging voltage of the terminal is greater than the preset voltage value, the second control interface is at a low level, the second control switch is controlled to be turned off, and the second light-emitting unit does not emit light; and the control end of the third control switch is at a high level, the third control switch is controlled to be switched on, and the first light-emitting unit emits light.
4. The charge indicator according to claim 2, wherein when the terminal is powered off and charged, and the charging voltage of the terminal is smaller than the preset voltage value, the second control interface is at a high level, the second control switch is controlled to be turned on, and the second light-emitting unit emits light; the third control interface is at a low level, the control end of the third control switch is at a low level, the third control switch is controlled to be turned off, and the first light-emitting unit does not emit light.
5. The charge indicator of claim 4, wherein when the charging voltage of the terminal is greater than the preset voltage value, the second control interface is at a low level, the second control switch is controlled to be turned off, and the second light-emitting unit does not emit light; the third control interface is in a high-voltage state, the control end of the third control switch is in a high level, the third control switch is controlled to be conducted, and the first light-emitting unit emits light.
6. The charge indicating device of claim 1, wherein the control switch further comprises a fourth control switch, the control interface further comprising an enable interface, the second and third control switches being connected to ground through the fourth control switch; the enable interface is connected with the control end of the fourth control switch, and the first conduction end of the fourth control switch is connected with the second conduction end of the second control switch and the second conduction end of the third control switch;
when the charging temperature of the terminal is higher than a preset temperature threshold value, the enabling interface is at a low level, the fourth control switch is controlled to be cut off, and the first light-emitting unit and the second light-emitting unit do not emit light.
7. The charge indication device according to any one of claims 1 to 6, wherein the first control switch, the second control switch, and the third control switch comprise an N-channel MOS transistor; the light emitting unit includes an LED.
8. A terminal, characterized in that the terminal comprises a charge indication device according to any of claims 1-7, and further comprises a charging device.
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