WO2024067032A1 - Watch, charging base, and charging system - Google Patents

Abstract

The present application relates to the technical field of terminals, and discloses a watch, a charging base, and a charging system. The watch is charged on the charging base; a first charging chip in the watch is a quick-charging chip; a first optical communication module has one end electrically connected to a first processor, and the other end connected to an optical module; the first charging chip is electrically connected to the first processor; a charging interface is electrically connected to the first charging chip; and the first charging chip is connected to a battery. The first processor measures a voltage on the charging interface, and if the voltage on the charging interface is greater than or equal to a preset threshold voltage, the first processor generates charging demand data and sends same to the first optical communication module, the demand data being used for indicating that the watch is ready for quick charging. The first optical communication module converts the charging demand data from an electric signal to an optical signal, and sends the charging demand data to the charging base by means of the optical module. The charging chip receives the electric signal from the charging base by means of the charging interface so as to quickly charge the battery.

Description

A watch, a charging base and a charging system

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on September 30, 2022, with application number 202211216518.X and invention name “A watch, a charging base and a charging system”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present application example relates to the field of terminal technology, and in particular to a watch, a charging base, and a charging system.

Background technique

With the development of technology, wearable watches are increasingly used in life, and the need for faster charging speeds has become increasingly important. Consumers hope that the watch can be charged in just a few minutes and last for one or two days. Charging speed has also become a key indicator for consumers to choose wearable watches. Due to the compact space, wearable watches cannot be placed on USB ports like mobile phones. The data cable of the USB interface communicates with the battery fast charging management IC to transmit the fast charging protocol, thereby achieving fast charging. Therefore, how to achieve fast charging of wearable watches and improve the charging speed of wearable watches has become an urgent problem to be solved.

Summary of the invention

The present application provides a watch, a charging base and a charging system. The charging system can enable the charging base to communicate with the watch battery fast charging management IC, solve the fast charging protocol transmission problem, realize fast charging of the wearable watch, and greatly improve the charging speed of the wearable watch.

In the first aspect, the present application provides a watch, which is used for charging on a charging base. The watch includes a first processor, a first charging chip, a first optical communication module, a charging interface, a battery and an optical module. The first charging chip is a fast charging chip. One end of the first optical communication module is electrically connected to the first processor, and the other end is connected to the optical module. The first charging chip is electrically connected to the first processor, the charging interface is electrically connected to the first charging chip, and the first charging chip is connected to the battery. The first processor detects the voltage on the charging interface. If the voltage on the charging interface is greater than or equal to the preset threshold voltage; the first processor generates charging demand data and sends it to the first optical communication module. The demand data is used to indicate that the watch is ready for fast charging. The first optical communication module converts the charging demand data from an electrical signal to an optical signal and sends it to the charging base through the optical module. The charging interface is used to be electrically connected to the charging base. The charging chip receives the electrical signal from the charging base through the charging interface to quickly charge the battery.

On this basis, by setting up a first optical communication module, the first optical communication module can convert electrical signals into optical signals, or convert optical signals into electrical signals. By setting one end of the first optical communication module to be electrically connected to the first processor and the other end to be connected to the optical module, the electrical signal generated in the first processor can be converted into an optical signal for transmission so as to communicate with the charging base. The electrical signal generated in the first processor can represent the fast charging demand of the watch. At the same time, the electrical signal can contain information such as the current power of the battery in the watch, the current charging current, and the current charging voltage, so that the charging base can adjust the charging current and charging voltage according to the charging status of the watch.

The watch converts the generated charging demand information from an electrical signal to an optical signal through the first optical communication module, and sends it to the charging base through the optical module. After receiving the optical signal sent by the watch, the optical communication module in the charging base can convert the optical signal into an electrical signal, and then quickly charge the watch according to the fast charging demand in the signal. In the embodiment of the present application, the watch and the charging base can communicate via infrared light, and the infrared light communication can Realize the communication of fast charging protocol data to transmit fast charging protocol data, so as to realize fast charging of the watch by the charging base.

In a possible design of the first aspect, the first optical communication module includes a transmitting end and a receiving end, the optical module includes a transmitting lamp and a receiving tube, the transmitting end of the first optical communication module is electrically connected to the transmitting lamp, and the receiving end of the first optical communication module is electrically connected to the receiving tube. The transmitting end of the first optical communication module is used to convert the received electrical signal into an optical signal, and transmit the optical signal to the charging base through the transmitting lamp. The receiving end of the first optical communication module is used to convert the optical signal received by the receiving tube into an electrical signal.

On this basis, the first optical communication module can convert the electrical signal sent by the first processor into an optical signal, and then transmit the optical signal through the transmitting lamp. It can also convert the optical signal received by the receiving tube into an electrical signal and then send it to the first processor for data processing.

In a possible design of the first aspect, the watch also includes a PPG module, the PPG module is electrically connected to the optical module, and the first processor controls one of the PPG module and the first optical communication module to maintain a conductive state with the optical module.

On this basis, the PPG module is connected to the optical module to detect human health information. By setting the first processor to control one of the PPG module and the first optical communication module to remain in a conductive state with the optical module, the watch can enable different functions in different scenarios. For example, when the watch is worn on the wrist, the watch turns on the PPG function; when the watch is placed on the charging base, the first optical communication module function is turned on to realize the transmission of fast charging protocol data and improve the charging speed of the watch.

In a possible design manner of the first aspect, the first processor is used to: when the voltage of the charging interface is greater than or equal to a preset threshold voltage, control the first optical communication module and the optical module to remain in an on state, and control the PPG module and the optical module to remain in a disconnected state.

On this basis, by detecting whether the voltage of the charging interface is greater than the threshold voltage, it can be determined whether the watch is on the charging base. When the voltage of the charging interface is greater than or equal to the preset threshold voltage, it indicates that the watch is on the charging base. Therefore, the first optical communication module is controlled to remain in a conductive state with the optical module, and the PPG module is controlled to remain in a disconnected state with the optical module.

In a possible design of the first aspect, the first processor is used to: when it is detected that the voltage on the charging interface is less than a threshold voltage, control the PPG module and the optical module to remain in an on state, and control the first optical communication module and the optical module to remain in a disconnected state.

On this basis, by detecting whether the voltage on the charging interface is less than the threshold voltage, it can be determined that the watch is not on the charging base, so the PPG module of the watch can be controlled to be in the on state.

In a possible design of the first aspect, the first processor is used to: when the battery is fully charged and the voltage of the charging interface is greater than or equal to a preset threshold voltage, control the first optical communication module to send a full charge signal to the charging base through the optical module.

On this basis, when the battery is fully charged and the voltage of the charging port is greater than or equal to the preset threshold voltage, it indicates that the watch is on the charging base and no longer needs to be charged, so a full charge information is sent to the charging base.

In a possible design manner of the first aspect, the first processor is used to: when the first optical communication module receives a response signal from the charging base, control the first optical communication module to remain disconnected from the optical module.

On this basis, when the first optical communication module receives a response signal from the charging base, indicating that the watch has received a response signal from the charging base that the watch is fully charged, the watch does not need to be charged anymore, so the first Optical communication module.

In the second aspect, the present application provides a charging base, which is used to charge a watch. The charging base is connected to a power adapter via a data cable. The charging base includes a second processor, a second charging chip, a second optical communication module, charging contacts and an optical module. The second charging chip is a fast charging chip. One end of the second optical communication module is electrically connected to the optical module, and the other end is electrically connected to the second processor. The second charging chip is electrically connected to the second processor, and the charging contacts are used to be electrically connected to the watch. The optical module receives an optical signal from the watch, and the optical signal is used to instruct the charging base to quickly charge the watch. The second optical communication module converts the optical signal into an electrical signal and sends it to the second processor. After the second processor processes the electrical signal, it sends it to the second charging chip. The second charging chip sends the electrical signal to the power adapter via the data cable, and the power adapter adjusts the charging signal output to the charging base.

On this basis, by setting one end of the second optical communication module to be electrically connected to the optical module and the other end to be electrically connected to the second processor, the optical signal received by the optical module can be converted into an electrical signal, and the electrical signal is sent to the second processor, so that the charging base can receive the charging request information from the watch. The charging base can process the information contained in the optical signal and send it to the power adapter, thereby adjusting the charging voltage/current of the watch to achieve fast charging of the watch.

In a possible design of the second aspect, the second optical communication module includes a transmitting end and a receiving end, the optical module includes a transmitting lamp and a receiving tube, the transmitting end of the second optical communication module is electrically connected to the transmitting lamp, and the receiving end of the second optical communication module is electrically connected to the receiving tube. The transmitting end of the second optical communication module is used to convert the received electrical signal into an optical signal, and transmit the optical signal to the watch through the transmitting lamp. The receiving end of the second optical communication module is used to convert the optical signal received by the receiving tube into an electrical signal.

In a possible design manner of the second aspect, the second processor is used to: when it is detected that the current of the charging contact is greater than or equal to a preset threshold current, control the second optical communication module to be in a conducting state.

On this basis, when it is detected that the current of the charging contact is greater than or equal to the preset threshold current, it indicates that the watch is located on the charging base, so the second optical communication module is turned on to communicate with the watch.

In a possible design manner of the second aspect, the second processor is used to: when it is detected that the current of the charging contact is less than a preset threshold current, control the second optical communication module to be in a closed state.

On this basis, when it is detected that the current of the charging contact is less than the preset threshold current, it indicates that the hand has left the charging base, so the second optical communication module is turned off to avoid energy waste.

In a possible design of the second aspect, the second processor is used to: when the second optical communication module receives a full signal from the watch, control the second optical communication module to send a response signal to the watch, and then control the second optical communication module to be in a closed state.

In a third aspect, the present application provides a charging system, comprising a watch as described in the first aspect and any possible design thereof, and a charging base as described in the second aspect and any possible design thereof.

In a fourth aspect, the present application provides a computer-readable storage medium, comprising computer instructions. When the computer instructions are executed on the charging system, the wireless charging base performs the functions of the charging system as described in the third aspect.

In a fifth aspect, the present application provides a computer program product. When the computer program product is run on a computer, the computer executes the functions of the charging system described in the third aspect.

It can be understood that the beneficial effects that can be achieved by the wireless charging system described in the third aspect, the computer-readable storage medium described in the fourth aspect, and the computer program product described in the fifth aspect provided above can be referred to as described in the first aspect. The beneficial effects of the first aspect and any possible design thereof, as well as the beneficial effects of the second aspect and any possible design thereof, will not be elaborated here.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a charging system in the prior art;

FIG2 is a product morphology diagram of a charging system provided in an embodiment of the present application;

FIG3 is a schematic diagram of a circuit structure of a charging system provided in an embodiment of the present application;

FIG4 is a comparison diagram of a control signal before and after modulation in an embodiment of the present application;

FIG5 is a comparison diagram of a modulation signal before and after demodulation in an embodiment of the present application;

FIG6 is a circuit diagram of an RC demodulation simulation circuit provided in an embodiment of the present application;

FIG7 is a waveform diagram of a transmission signal provided by an embodiment of the present invention;

FIG8 is a waveform diagram of another transmission signal provided by an embodiment of the present invention;

FIG9 is a waveform diagram of another transmission signal provided by an embodiment of the present invention;

FIG10 is a top view of a charging base provided in an embodiment of the present application;

FIG11 is a side view of a charging base provided in an embodiment of the present application;

FIG12 is a schematic diagram of a system architecture of a charging system provided in an embodiment of the present application;

FIG13 is a flowchart of a charging system provided in an embodiment of the present application;

FIG14 is another working flow diagram of a charging system provided in an embodiment of the present application;

FIG15 is another working flow diagram of a charging system provided in an embodiment of the present application;

FIG16 is another working flow chart of a charging system provided in an embodiment of the present application;

FIG17 is a hardware structure diagram of a charging base in a charging system provided in an embodiment of the present application;

FIG18 is a hardware structure diagram of a watch in a charging system provided in an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

It should be understood that the terms used in the description of the various examples herein are only for describing specific examples and are not intended to be limiting. As used in the description of the various examples, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple.

It should also be understood that the term "and/or" used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. The term "and/or" is a term used to describe the association of objects. An association relationship indicates that there can be three types of relationships. For example, A and/or B can indicate that A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this application generally indicates that the related objects are in an "or" relationship.

It should also be understood that in the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a sliding connection, a detachable connection, or an integral connection, etc.; it can be a direct connection or an indirect connection through an intermediate medium.

It should also be understood that the term “comprise” (also known as “includes,” “including,” “comprises” and/or “comprising”) when used in this specification specifies the presence of stated features, integers, steps, operations, elements, and/or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should be understood that the "one embodiment", "another embodiment", "a possible design" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment or implementation are included in at least one embodiment of the present application. Therefore, "in one embodiment of the present application" or "in another embodiment of the present application", "a possible design" appearing in various places throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

In order to facilitate understanding of the technical solution of the present application, before writing the embodiments of the present application, the technical background related to the technical solution of the present application, that is, the charging principle between the watch and the charging base in the existing technical solution, is first introduced.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a charging system in the prior art. As shown in FIG. 1 , FIG. 1 (a) is a schematic diagram of the bottom of a watch, and FIG. 1 (b) is a schematic diagram of a charging base. As shown in FIG. 1 , two charging interfaces are provided at the bottom of the watch: a power interface (VBUS PAD) and a ground interface (GND PAD), wherein the power interface is used to connect to a charging power source, and the ground interface is used to make a ground connection. Two charging contacts are provided on the charging base: a power contact (VBUS Pogo Pin) and a ground contact (GND Pogo Pin), wherein the power contact is used to connect to a power source, and the ground contact is used to make a ground connection. A power adapter (not shown in the figure) is connected to the charging base. When the watch needs to be charged, the watch is placed on the charging base so that the power interface on the watch contacts the power contact on the charging base, and the ground interface on the watch contacts the ground contact on the charging base, and the charging base can charge the watch. The adapter connected to the charging base generally outputs a fixed voltage and current to charge the watch. Moreover, since both the charging interface and the charging contacts have large impedance, the charging current is limited, making the charging speed of this charging method slower.

Existing watches generally have a photoplethysmography (PPG) function, which uses infrared light/green light emitted by an optical module on the watch to detect the human body's exercise heart rate. As shown in Figure 1 (a), the watch is provided with a transmitting lamp for emitting infrared light/green light, and a receiving tube for receiving infrared light/green light, wherein the transmitting lamp is arranged in the transmitting hole of the watch, and the receiving tube is arranged in the receiving hole of the watch, and the bottom shell portion corresponding to the transmitting hole and the receiving hole is generally set to be transparent, so as to emit infrared light/green light outward and receive infrared light/green light. In the prior art, the optical components (transmitting lamp and receiving tube) of the watch are mainly used to realize the PPG function described above.

In order to solve the problem of slow charging speed of watches in the prior art, an embodiment of the present application provides a charging system, which can utilize existing components of a watch and realize fast charging protocol data transmission of digital signals by adding an infrared digital modulation and demodulation circuit, thereby realizing fast charging of the watch. The embodiment of the present application is described below in conjunction with Figures 2 to 18.

Refer to Figure 2, which is a product morphology diagram of a charging system provided in an embodiment of the present application. Figure 2 shows a structural schematic diagram of the bottom of the watch and a structural schematic diagram of the top of the charging base. As shown in Figure 2, two charging interfaces are provided at the bottom of the watch: a power interface (VBUS PAD) and a ground interface (GND PAD), wherein the power interface is used to connect to the charging power source, and the ground interface is used to make a ground connection.

The watch is provided with a transmitting lamp for transmitting infrared light/green light, and a receiving tube for receiving infrared light/green light, wherein the transmitting lamp is arranged in the transmitting hole of the watch, and the receiving tube is arranged in the receiving hole of the watch, and the bottom shell parts corresponding to the transmitting hole and the receiving hole are generally set to be transparent, so as to transmit infrared light/green light outward and receive infrared light/green light. The transmitting hole can be set to be circular, the transmitting lamp can be symmetrically arranged in the transmitting hole, the number of transmitting lamps can be set to one or more, and it is set to two in the present application. The receiving hole can be set to be annular, and the receiving tubes can be evenly arranged in the receiving hole, and the number of receiving tubes is generally set to be multiple, so as to better receive infrared light/green light. In the present application, the number of receiving tubes is set to 8. Among them, the transmitting hole can be set in the receiving hole, and in the present application, the size of the transmitting hole is the same as the size of the inner diameter of the receiving hole.

The charging base is also provided with a transmitting lamp for transmitting infrared light/green light, and a receiving tube for receiving infrared light/green light. The number of transmitting lamps and receiving tubes in the charging base can be set as needed, wherein the position of the transmitting lamp in the charging base can be set with reference to the position of the receiving tube in the watch, and the position of the receiving tube in the charging base can be set with reference to the position of the transmitting lamp in the watch, so that when the watch is placed on the charging base, the receiving tube on the charging base can fully receive the infrared light/green light emitted by the transmitting lamp in the watch, and the receiving tube on the watch can fully receive the infrared light/green light emitted by the transmitting lamp in the charging base.

The charging base is also provided with two charging contacts: a power contact (VBUS Pogo Pin) and a ground contact (GND Pogo Pin). The power contact is used to connect to the power source, and the ground contact is used to connect to the ground. When the watch is placed on the charging base for charging, the power interface on the watch contacts the power contact on the charging base, and the ground interface on the watch contacts the ground contact on the charging base. The charging base is connected to a power adapter, which is connected to a wall power supply to provide matching power output for the charging base.

For ease of understanding, the present application embodiment introduces the circuit structure diagram inside the watch and the charging base in conjunction with the accompanying drawings to illustrate the principle of optical communication between the watch and the charging base.

Please refer to Figure 3, which is a schematic diagram of the circuit structure of a charging system provided in an embodiment of the present application. As shown in Figure 3, the charging system includes a watch and a charging base.

The watch includes a processor, which may be a microcontroller unit (MCU), a PPG module, a first optical communication module, a transmitting light and a receiving tube, wherein the first optical communication module includes a transmitting end and a receiving end. The processor (MCU) of the watch is respectively connected to the transmitting end and the receiving end in the first optical communication module. The PPG module is respectively electrically connected to the transmitting light and the receiving tube in the watch. The PPG module is also electrically connected to the processor (MCU), and the MCU can control the working state of the PPG module through an enable signal PPG_EN, such as controlling the PPG module to turn on or off. The transmitting end in the first optical communication module is connected in parallel with the PPG module to the transmitting light of the watch, and the receiving end in the first optical communication module is connected in parallel with the PPG module to the receiving tube of the watch.

The charging base includes a processor, which may be a microcontroller unit (MCU), a second optical communication module, a transmitting light, and a receiving tube, wherein the second optical communication module also includes a transmitting end and a receiving end. The processor (MCU) of the charging base is connected to the transmitting end and the receiving end of the second optical communication module respectively. The transmitting end of the second optical communication module is connected to the transmitting light in the charging base, and the receiving end of the second optical communication module is connected to the receiving tube in the charging base.

As shown in FIG3 , when optical communication is required between the watch and the charging base (such as during charging), the processor in the watch adjusts the PPG_EN enable signal to an invalid state (disable state), and adjusts the 5V power supply_EN enable signal to an invalid state (disable state), for example, adjusting the PPG_EN enable signal and the 5V power supply_EN enable signal to a low level. At this time, the PPG module is in the off state. Then adjust the control switches SW1, SW2, SW3, and SW4 to be in the closed state, and the first optical communication module is in the working state.

When the first optical communication module is working, the transmitting end of the first optical communication module converts the electrical signal sent by the watch MCU into an infrared light signal and transmits it. The receiving end in the second optical communication module in the charging base will receive the infrared light signal, and convert the infrared light signal into an electrical signal and send it to the MCU in the charging base, thereby realizing the transmission of infrared light communication fast charging data. Similarly, the transmitting end of the second optical communication module converts the electrical signal sent by the charging base MCU into an infrared light signal and transmits it. The receiving end in the first optical communication module in the watch will receive the infrared light signal, and convert the infrared light signal into an electrical signal and send it to the MCU of the watch, thereby realizing the transmission of infrared light communication fast charging data.

When human body detection is required and the PPG function is turned on, the control switches SW1, SW2, SW3, and SW4 can be adjusted to be disconnected, the PPG_EN enable signal can be adjusted to be valid, and the 5V power supply_EN enable signal can also be adjusted to be valid, for example, the PPG_EN enable signal and the 5V power supply_EN enable signal can be adjusted to be high. At this time, the first optical communication module in the watch stops working, and the PPG module in the watch is turned on.

In the embodiment of the present application, when the watch wants to send data to the charging base, since infrared light communication is used for data transmission, in order to improve the anti-interference ability of infrared rays and avoid interference from infrared rays in the atmosphere, the signal IR_TX sent by the MCU on the watch end to the first optical communication module can be modulated by a square wave of 38KHz and a duty cycle of 1/3. The signals before and after modulation can refer to Figure 4, which is a comparison diagram of a control signal before and after modulation in the embodiment of the present application.

The modulated signal IR_TX can control the on/off of transistor Q1 to drive the infrared emission lamp D1 to turn on and off. The infrared light is emitted through the infrared light emission hole of the watch to the infrared light receiving hole on the charging base.

The infrared receiving tube D2 on the charging base receives the infrared light signal emitted from the infrared light emitting hole on the watch through the infrared light receiving hole on the charging base, and converts the infrared light signal into a modulated electrical signal. After demodulation by the RC circuit, the IR_TX signal is amplified by the transistor Q2 and converted into a data signal recognized by the MCU on the charging base. The signals before and after the conversion can be referred to in Figure 5, which is a comparison diagram of a modulated signal before and after demodulation in an embodiment of the present application.

Similarly, when the charging base sends data to the watch, the MCU of the charging base modulates IR_RX at 38KHz. The modulated IR_RX signal can control the on/off of transistor Q3 to drive the infrared emission lamp D3 to turn on and off. The infrared light is emitted through the infrared light emitting hole of the charging base to the infrared light receiving hole on the watch end.

The infrared receiving tube D4 on the watch receives the infrared light signal emitted by the infrared light emitting hole on the charging base through the infrared light receiving hole on the watch, and converts the infrared light signal into a modulated electrical signal. After demodulation by the RC circuit, the IR_RX signal is amplified by the transistor Q4 and converted into a data signal that can be recognized by the MCU on the watch.

Wherein, the RC circuit is composed of a resistor and a capacitor. Referring to FIG6 , FIG6 is a circuit diagram of an RC demodulation simulation circuit provided in an embodiment of the present application. The RC circuit meets the requirement that the PWM frequency should be much greater than the cut-off frequency fc=1/2πRC of the RC low-pass filter circuit. The PWM frequency is 38KHz, fc=1/2πRC=1/(2*3.14*1k*4.7u)=0.33KHz<<38KHz, which meets the demodulation conditions.

The signal source V1 may be a pulse signal with an amplitude of 1.8V, a duty cycle of 33%, and a frequency of 38KHz to simulate a 38KHz modulation signal input.

The infrared light transmission data between the watch and the charging base can have a customized protocol rule. Referring to FIG7, FIG7 is a waveform diagram of a transmission signal provided by the embodiment of the present invention. The infrared communication module transmits a data frame including a start bit + 8 bits. Valid data + 8-bit valid data inverse code (to improve transmission reliability) + end bit. The start bit is 9mS carrier + 4.5mS high level, each bit of valid data is 1mS, each bit of valid data inverse code is 1mS, and the end bit is 2.25mS high level + 4.5mS carrier.

Refer to Figure 8, which is a waveform diagram of another transmission signal provided by the embodiment of the present invention. When the infrared communication module receives a frame of data, it is passed to the MCU, and the MCU gives a response signal. The response signal includes a start bit of 8mS carrier + 4.5mS high level + 6mS carrier. When the response signal is not received within 50mS after transmitting a frame of data, a frame of data will be transmitted again. If the response signal is not received, the MCU will interrupt and report an error.

Refer to Figure 9, which is a waveform diagram of another transmission signal provided by the embodiment. When the infrared communication module receives an abnormal response, the MCU will identify and handle the problem based on the abnormal response data. The abnormal response includes an error reporting instruction + 8-bit error reporting data + 8-bit error reporting data inverse code (to improve transmission reliability) + end bit. The error reporting instruction is 8mS carrier + 4.5mS high level, each bit of valid data is 1mS, each bit of valid data inverse code is 1mS, and the end bit is 2.25mS high level + 4.5mS carrier.

Referring to Figures 10 and 11, Figure 10 is a top view of a charging base provided in an embodiment of the present application, and Figure 11 is a side view of a charging base provided in an embodiment of the present application.

As shown in Figures 10 and 11, in the embodiment of the present application, in order to enhance the anti-interference ability of infrared light transmission in the watch and the charging base, a light shield can be added to the infrared light emission hole to reduce the influence of light in the natural environment on the infrared light transmission of the watch and the charging base. Combined with the use of Fresnel lens, the thickness of the whole machine can be reduced, and the brightness of the image can be kept consistent after convergence and projection. The use of Fresnel lens can make the infrared light better transmitted.

For ease of understanding, the embodiment of the present application is described in conjunction with the accompanying drawings to illustrate the charging principle of communication between the above-mentioned watch and the charging base to achieve fast charging.

Please refer to Figure 12, which is a schematic diagram of the system architecture of a charging system provided in an embodiment of the present application. The charging system includes a device to be charged, a charging base and a power adapter.

The watch also includes a first processor, a first charging chip, a first optical communication module, a PPG functional module and a battery, wherein the optical communication module and the PPG functional module are both connected to the transmitting light and the receiving tube in the watch, the optical communication module is also electrically connected to the first processor, the first processor is electrically connected to the first charging chip, and the first charging chip is electrically connected to the battery.

The above-mentioned first processor may be a microcontroller unit (MCU) in a watch. The above-mentioned first charging chip may include one chip or multiple chips, including a fast charging chip that supports a fast charging protocol, such as an SC chip, and a chip that supports a normal charging protocol, such as a BUCK chip. The MCU can control the SC chip and the BUCK chip to select different chips to charge the battery in the watch. The first optical communication module may be an infrared modulation and demodulation circuit arranged in the watch, and the infrared modulation and demodulation circuit may be set with reference to the circuit in FIG. 3, and is used to convert the received infrared light signal into an electrical signal, or to convert the electrical signal into an optical signal. The PPG function module is a built-in function in the watch, which is used to analyze the health information of the human body. For this part, please refer to the introduction in the prior art or existing products, and the embodiments of the present application will not be repeated.

The PPG module uses the infrared light/green light emitted by the optical module (transmitter and receiver) on the watch to detect the human heart rate during exercise. The first optical communication module uses the infrared light/green light emitted by the optical module (transmitter and receiver) on the watch to transmit information. The watch can switch between the PPG module and the first optical communication module. When human information detection is required, the PPG module can be switched to connect to the optical module and the infrared light/green light emitted by the optical module can be used to detect the human body. When information transmission is required, the first optical communication module can be switched to connect to the optical module. The communication module is connected to the optical module and uses the infrared light/green light emitted by the optical module to transmit information.

The charging base includes a second processor, a second charging chip, a second optical communication module, charging contacts and a USB interface, etc., wherein the second processor is electrically connected to the second optical communication module and the second charging chip respectively, the second charging chip is connected to the USB interface, and the second optical communication module is connected to the transmitting light and the receiving tube in the charging base.

The second processor in the charging base can be a microcontroller unit (MCU) in the charging base. The second charging chip in the charging base can be one or more chips. In the embodiment of the present application, the chip includes two chips, one of which is a chip in the charging base that supports the fast charging protocol, which is used for the communication of the fast charging data protocol, and the other is a power protection chip connected to the power contact. The second optical communication module in the charging base can be a modem or an infrared modulation and demodulation circuit arranged in the charging base, which is used to convert the received infrared light signal into an electrical signal, or convert the electrical signal into an optical signal. The second optical communication module has the same working principle as the first optical communication module in the watch, and can be referenced to each other.

Since the watch is worn on the wrist of the human body most of the time, when it is worn on the wrist, its PPG module is turned on and its first optical communication module is turned off. When it needs to be charged, since communication is required, the first optical communication module needs to be turned on and the PPG module needs to be temporarily turned off. Therefore, before charging, the watch will detect whether it is on the charging base.

Specifically, when the watch is placed on the charging base, the charging interface on the watch contacts the charging contacts on the charging base, and the charging base provides the watch with charging voltage and current. The watch detects that the voltage on the power interface changes, and when the voltage reaches a preset threshold voltage, it can be determined that the watch is placed on the charging base and is being charged. Therefore, the PPG module in the watch is turned off, and the first optical communication module is turned on, and the watch is in a state of preparing to communicate with the charging base.

When the watch is placed on the charging base, the charging port on the watch contacts the charging contacts on the charging base and transmits electrical signals, so the charging base can also detect the current change on the power contacts, and when the current reaches the preset threshold current, it can be determined that the watch is being charged on the charging base. At this time, the second optical communication module in the charging base is turned on to prepare for communication with the watch.

When the charging base is charging the watch, if you want to achieve fast charging, you need to communicate with the fast charging protocol. The following is a confirmation of the process of fast charging between the watch and the charging base.

When the watch confirms that it is connected to the charging base, and the charging base confirms that the watch is connected to the charging base, the watch and the charging base are ready for optical communication. The link that sends data from the watch to the charging base is called the transmit (TX) link, and the link that sends data from the charging base to the watch is called the receive (RX) link.

When the watch is connected to the charging base, in the transmission link, the first processor in the watch will generate the fast charge request data IR_TX after encoding and modulation, and send the fast charge request data IR_TX to the first optical communication module. After receiving the fast charge request data IR_TX, the first optical communication module will convert it into an infrared light signal and transmit it through the transmitting light in the watch. After the receiving tube on the charging base receives the infrared light signal emitted by the transmitting light in the watch, it will transmit the signal to the second optical communication module in the charging base. The second optical communication module will convert the infrared light signal into an electrical signal, which is the aforementioned fast charge request data IR_TX. Then the second optical communication module will send the data to the second processor for decoding. The second processor will send the decoded fast charge request data IR_TX to the fast charge protocol chip in the charging base. The fast charge protocol chip processes the fast charge request data of the smart watch, and communicates the fast charge protocol with the power adapter through the USB interface on the charging base (and the USB data cable that supports the fast charge protocol). The power adapter will output the VBUS voltage according to the fast charge request data sent by the watch. Adjustment: The electrical signal output by the power adapter is transmitted to the fast charging chip (such as SC chip) in the watch through the power protection chip, power contacts and power interface of the charging base. The battery in the watch is charged with a large current through the fast charging chip to achieve fast charging.

During fast charging, when the battery power of the charged device is low, high current charging is generally used to achieve fast charging. When the battery is almost full, it will switch to low current charging. In the present application, the first charging chip in the watch includes a fast charging chip and a BUCK chip. Both the fast charging chip and the BUCK chip are connected to the first processor. The first processor can switch between the fast charging chip and the BUCK chip to charge the battery through different chips. When the high-current charging with the fast charging chip is completed, the first processor in the watch will turn off the fast charging chip, turn on the BUCK chip, and use the BUCK chip to charge the battery with a low current. Charging the battery with currents of different sizes using different charging chips belongs to the prior art. The detailed implementation scheme and principle of this technology in the embodiments of the present application will not be repeated, and the relevant schemes in the prior art can be directly referred to.

During the process of charging the watch by the charging base, on the transmitting link, the second processor in the charging base will send the fast charging information status data IR_RX after coding and modulation to the second optical communication module in the charging base. After receiving the fast charging information status data IR_RX, the second optical communication module will convert the electrical signal into an infrared light signal and transmit it through the transmitting light on the charging base. After the receiving tube on the watch receives the infrared light signal emitted by the charging base, it sends the signal to the first optical communication module. The first optical communication module converts the received infrared light signal into an electrical signal and sends the electrical signal to the first processor. The first processor decodes the fast charging information status data IR_RX, and then the first processor adjusts the working status of the fast charging chip and the BUCK chip according to the decoded fast charging information status data IR_RX, and performs corresponding control and scheduling on the system.

During the fast charging process, the first processor in the watch continuously generates fast charging request data IR_TX, which may include the current status information of the battery in the watch, and then transmits the request data to the charging base through the first optical communication module and the transmitting light in the watch. After receiving the signal, the charging base processes it into fast charging protocol data, and then communicates with the power adapter using the standard fast charging protocol, so that the power adapter can continuously adjust the output voltage according to the fast charging request data IR_TX sent from the watch, thereby continuously adjusting the voltage at the input end of the fast charging chip in the watch to charge the battery.

In an embodiment of the present application, an optical communication module is set in the watch and the charging base to convert the fast charging protocol communication data from an electrical signal into an optical signal. The optical signal is emitted by the optical module in the watch, and then received by the optical module in the charging base. The optical signal is converted into an electrical signal and input into the power adapter, thereby realizing fast charging protocol communication and quickly charging the watch.

Since both the PPG module and the first optical communication module in the watch need to use the optical module (transmitting light and receiving tube) in the watch, when the watch is worn on the wrist, the PPG module and the optical module are needed to perform health checks on the human body; when the watch is connected to the charging base, the first optical communication module and the optical module are needed for fast charging protocol communication. Therefore, when the watch is in different states, it is necessary to switch between the PPG module and the first optical communication module. The following introduces the process of switching the watch between the PPG module and the first optical communication module, as well as the working process of the charging base.

Referring to Figures 13 and 14, Figure 13 is a flowchart of a charging system provided in an embodiment of the present application, and Figure 14 is another flowchart of a charging system provided in an embodiment of the present application. Figure 13 shows the workflow of the watch and the charging base after the watch is placed on the charging base, and Figure 14 shows the workflow of the watch and the charging base after the watch leaves the charging base.

As shown in Figures 13 and 14, the workflow of the watch in the charging system is as follows:

S101. The PPG module in the watch (watch PPG) detects whether the watch leaves the human wrist.

Since the watch is worn on the human wrist most of the time, the PPG function in the watch can be set to be turned on by default. When the watch is worn on the human wrist, the PPG function in the watch will continuously detect the human heart rate and other information. Therefore, the PPG function of the watch can be used to detect whether the watch is worn on the human wrist. For example, if the watch detects the human heart rate information (or other human information) within a preset time period, it can be considered that the watch is worn on the human wrist. If the watch does not detect the human heart rate information or other human information within the preset time period, it can be considered that the watch has left the wrist.

S102: The watch detects whether it is placed on the charging base.

When the watch is placed on the charging base, the charging port (VBUS PAD) on the watch contacts the charging contacts (VBUS Pogo Pin) on the charging base, and the charging base provides charging voltage and current to the watch, which will cause the voltage of the power port on the watch to change. Therefore, the voltage on the power port (VBUS PAD) of the watch can be detected. If the voltage on the power port of the watch is greater than or equal to the preset threshold voltage,

If the voltage on the power interface of the watch (VBUS voltage) is less than the preset threshold voltage, it can be considered that the watch is not placed on the charging base, or it can be considered that the watch has left the charging base.

S103. When the watch is placed on the charging base, the watch PPG module is turned off and the watch optical communication module is turned on.

If it is detected that the voltage (VBUS voltage) on the power interface of the watch is greater than or equal to the preset threshold voltage, it is considered that the watch has left the human wrist and is placed on the charging base. At this time, the watch enters the charging state, and both the PPG module and the optical communication module of the watch need to use the optical module (transmitter light and receiving tube) in the watch, and the two cannot use the optical module at the same time. Since the watch has left the human wrist and is placed on the charging base, it is not necessary to detect human information at this time, but it is necessary to communicate with the charging base through the fast charging protocol. Therefore, the PPG module of the watch is turned off and the optical communication module of the watch is turned on.

S104. When the watch leaves the charging base, the watch PPG module is turned on and the watch optical communication module is turned off.

If it is detected that the voltage (VBUS voltage) on the power interface of the watch is less than the preset threshold voltage, it is considered that the watch has left the charging base. At this time, the watch no longer needs the optical communication module to communicate with the charging base, and the watch will generally be worn again on the human wrist. Therefore, when the watch leaves the charging base, the watch PPG module can be turned on and the watch optical communication module can be turned off. The watch optical communication module is the first optical communication module of the watch in the aforementioned embodiment.

As shown in Figures 13 and 14, the working process of the charging base in the charging system is as follows:

S201, the charging base detects whether the watch is placed on the charging base.

When the watch is placed on the charging base, the charging port (VBUS PAD) on the watch is in contact with the charging contact (VBUS Pogo Pin) on the charging base and transmits electrical signals. Therefore, the charging base can also determine whether the watch is placed on the charging base by detecting the change in the current on the power contact. If the current on the power contact in the charging base is greater than or equal to the preset threshold current (IBUS>threshold current), it can be considered that the watch is placed on the charging base. If the current on the power contact in the charging base is less than the preset threshold current, it can be considered that the watch has left the charging base, or that the watch is not placed on the charging base.

S202: If the watch is placed on the charging base, the optical communication module of the charging base is turned on; if the watch leaves the charging base, the optical communication module of the charging base is turned off.

When the charging base detects that the watch is placed on the charging base, the charging base needs to charge the watch. Since the charging base needs to transmit fast charging protocol data through the optical communication module when charging the watch, the optical communication module in the charging base needs to be turned on at this time to communicate with the optical communication module in the watch by infrared light. When the charging base detects that the watch leaves the charging base, the charging base does not need to charge the watch, and there is no need for optical communication between the charging base and the watch. Therefore, the optical communication module of the charging base is turned off. The optical communication module of the charging base is the second optical communication module in the charging base in the aforementioned embodiment.

Figures 13 and 14 show the work flow charts of the watch and the charging base when the watch is placed on the charging base and when the watch leaves the charging base. When the watch is placed on the charging base, the battery of the watch is fully charged, but it does not leave the charging base, if the optical communication module of the watch and the optical communication module of the charging base are kept in working state, it will cause energy waste. Therefore, when the watch is fully charged, the watch and the charging base will also turn off the corresponding optical communication modules and enter the energy-saving mode.

Specifically, refer to Figure 15, which is another workflow diagram of a charging system provided in an embodiment of the present application. Figure 15 shows the switching process of the optical communication module in the watch and the optical communication module in the charging base when the watch is fully charged.

S301, perform a full charge test on the battery in the watch.

As shown in Figure 15, when the watch is placed on the charging base for charging, the processor in the watch (such as the MCU in the watch) can obtain the charging status of the battery in the watch in real time, such as obtaining the current power of the battery, charging voltage, charging current and other information, so as to realize the full charge detection of the battery. When it is detected that the battery is not fully charged, the processor in the watch will continue to generate fast charge demand data, and communicate with the charging base according to the method described in the aforementioned embodiment to charge the battery in the watch. When it is detected that the battery is fully charged, it indicates that the watch no longer needs to be charged at this time. If the optical communication module in the watch and the optical communication module in the charging base continue to work, it will cause energy waste.

S302: Detect whether the watch is connected to the charging base.

When the watch detects that the expired battery is fully charged, the watch will detect whether it is on the charging base. Specifically, the voltage on the power interface (VBUS PAD) of the watch can be detected. If the voltage on the power interface of the watch (VBUS voltage) is detected to be less than the preset threshold voltage, the voltage on the power interface will continue to be detected. If the voltage on the power interface of the watch is detected to be greater than or equal to the preset threshold voltage (VBUS voltage ≥ threshold voltage), it can be considered that the watch is connected to the charging base.

S303: When the watch is placed on the charging base, the optical communication module of the watch sends a full charge command.

When the battery in the watch is fully charged and it is detected that the watch is connected to the charging base, it is no longer necessary to charge the battery in the watch. Therefore, the watch will send a full charge command to the charging base through the optical communication module.

S304: The base optical communication module receives a full command.

Since the watch is still on the charging base, and the optical communication module in the watch and the optical communication module in the charging base are still in the infrared light communication state, the optical communication module in the base can receive the full charge command sent by the optical communication module of the watch.

After receiving the full charge command, the optical communication module of the charging base sends the full charge command to the processor in the charging base (charging base MCU) for processing. After receiving the full charge command, the charging base MCU generates a corresponding response signal and sends the response signal through the optical communication module of the charging base.

Since the charging base has received the full charge command from the watch, it is no longer necessary to charge the watch. The base communication module is off.

After the optical communication module in the watch receives the response signal sent by the base optical communication module through infrared light communication, it sends the response signal to the processor on the watch side (watch side MCU). After receiving the response signal, the watch side MCU controls the watch optical communication module to shut down, so that the watch enters the energy-saving state.

Referring to Figure 16, Figure 16 is another workflow diagram of a charging system provided in an embodiment of the present application. Figure 16 shows the switching process of various modules in the watch and various modules in the charging base during the charging process and after the charging system is fully charged.

As shown in FIG12 , when the charging base is charging the watch, the electrical signal sent by the power adapter to the charging base is transmitted to the charging chip (such as an SC chip) in the watch through the power contacts and the power interface, and the charging chip charges the battery in the watch.

As shown in FIG16 , in the watch end, after receiving the electrical signal sent by the charging base, the SC chip in the watch charges the battery. During the charging process, the charging chip in the watch detects the charging current of the battery and sends the detected data to the processor in the watch. The watch processor (watch MCU) processes the data. The watch processor generates corresponding charging demand data or analyzes whether the battery is full according to the processed data. The charging demand data includes the current status information of the battery in the watch and whether it is necessary to request to adjust the charging voltage (VBUS voltage). If the VBUS voltage needs to be adjusted or it is determined that the battery is full, the processor will generate a corresponding data packet and send the data to the watch optical communication module, and the watch optical communication module will send a data frame to the charging base. When the optical communication module sends a data frame to the charging base, the MCU in the watch will detect the number of times the watch optical communication module sends the data frame. If the number of times the watch optical communication module sends the data frame is greater than 2 times, it means that the charging base has not received the data frame, indicating that there may be a poor connection problem or other errors between the watch and the charging base. At this time, the MCU in the watch will generate an error interrupt, indicating that there is a problem with the data communication between the watch and the charging base.

If the number of times the optical communication module of the watch sends data frames is less than or equal to 2 times, it means that the connection between the watch and the charging base is normal and the data communication is normal. The charging base can receive the data frame sent by the optical communication module in the watch through its optical communication module. After receiving the data frame, the optical communication module in the charging base will send the data frame to the processor in the charging base (charging base MCU) for data processing.

If the data frame sent by the watch is fast charging protocol data, the processor in the charging base (charging base MCU) will send the processed data to the fast charging protocol chip in the charging base, and the fast charging protocol chip in the charging base will then send the data to the power adapter through the USB data cable connected between the charging base and the power adapter. The USB data cable is a data cable with a standard fast charging protocol. It should be noted that the fast charging chip in the watch, the fast charging protocol chip in the charging base, the USB data cable connecting the charging base and the power adapter, and the power adapter all need to support the same standard fast charging protocol. After the power adapter receives the fast charging protocol data sent by the charging base, the power adapter adjusts the VBUS voltage according to the data, and then sends the adjusted VBUS voltage to the SC chip in the watch through the charging base to charge the battery.

If the data frame sent by the watch is the data information of the battery being fully charged, the charging base MCU will control the optical communication module in the charging base to send a response signal after obtaining the data information and processing the data, and the response signal is used to indicate that the charging base has received the information that the watch battery is fully charged. And the optical communication module in the charging base is turned off to achieve energy saving.

After the optical communication module of the charging base sends a response signal, the optical communication module in the watch can receive the response signal, and the optical communication module sends the received response signal to the MCU in the watch, and the MCU determines whether the response signal is If it is an abnormal response signal, the watch MCU will perform a fault analysis. If it is not an abnormal response signal, the MCU in the watch will turn off the watch optical communication module to save energy. At the same time, the MCU can turn on the watch PPG module to detect human body information.

Referring to Figure 17, Figure 17 is a hardware structure diagram of a charging base in a charging system provided in an embodiment of the present application. As shown in Figure 17, the charging base may include an optical communication module 500, a processor 510, a memory 520, a sensor 530, a charging interface 540, a charging management module 550 (charging chip), etc.

It is understood that the structure illustrated in this embodiment does not constitute a specific limitation on the charging base. In other embodiments, the charging base may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

Among them, the memory 520 can be used to store program codes, such as program codes for wireless charging of devices to be charged (such as mobile phones). The memory 520 can also store a Bluetooth address for uniquely identifying the charging base. In addition, the memory 520 can also store connection data of electronic devices that have been successfully paired with the charging base before. For example, the connection data can be the Bluetooth address of an electronic device that has been successfully paired with the charging base. Based on the connection data, the charging base can automatically pair with the electronic device without having to configure the connection therewith, such as performing legitimacy verification. The above-mentioned Bluetooth address can be a media access control (MAC) address.

The processor 510 can be used to execute the above-mentioned application code and call related modules to implement the functions of the charging base in the embodiment of the present application. For example, the wireless charging function of the charging base is realized. The processor 510 may include one or more processing units, and different processing units may be independent devices or integrated in one or more processors 510. The processor 510 may specifically be an integrated control chip, or it may be composed of a circuit including various active and/or passive components, and the circuit is configured to perform the functions belonging to the processor 510 described in the embodiment of the present application. Among them, the processor of the charging base may be a microprocessor.

The optical communication module 500 can be used to support infrared light/green light communication data exchange between the charging base and other electronic devices.

The charging management module 550 manages external charging and can also provide power to the electronic components inside the charging base. The charging management module 550 receives power input from the charging interface and provides power to the processor 510, the memory 520, the sensor 530, the external memory, etc. In some other embodiments, the charging management module 550 can also be set in the processor 510.

It is understandable that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the charging base. It may have more or fewer components than those shown in FIG. 17 , may combine two or more components, or may have different component configurations. For example, the outer surface of the charging base may also include buttons, indicator lights (which may indicate charging status, incoming/outgoing calls, pairing mode, etc.), display screens (which may prompt the user with relevant information), and other components. Among them, the button may be a physical button or a touch button (used in conjunction with a touch sensor), etc., which is used to trigger operations such as powering on, powering off, starting charging, and stopping charging.

Please refer to Figure 18, which is a hardware structure diagram of a watch in a charging system provided in an embodiment of the present application. As shown in Figure 18, the watch may include a processor 610, a memory 620, a charging receiving module 630, a charging management module 640, an optical communication module 650, a battery 660, a wireless communication module 670, a display screen 680, etc.

The memory 620 can be used to store program codes, such as for receiving wireless charging signals from the charging base. The memory 620 may also store a Bluetooth address with a unique identifier between the device to be charged and other electronic devices. The Bluetooth address may be a media access control (MAC) address.

The processor 610 can be used to execute the above-mentioned application code and call related modules to implement the functions of the wireless device to be charged in the embodiment of the present application. For example, the wireless charging function, wireless communication function, etc. of the device to be charged are implemented. The processor 610 may include one or more processing units, and different processing units may be independent devices or integrated in one or more processors 610. The processor 610 may specifically be an integrated control chip, or it may be composed of a circuit including various active and/or passive components, and the circuit is configured to perform the functions belonging to the processor 610 described in the embodiment of the present application. Among them, the processor of the device to be charged 200 may be a microprocessor.

The optical communication module 650 can be used to support infrared light/green light communication data exchange between the watch and the charging base.

The wireless communication module 670 can be used for data exchange between the watch and other electronic devices (such as mobile phones, tablets), including Bluetooth (BT), global navigation satellite system (GNSS), wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), frequency modulation (FM), near field communication technology (NFC), infrared technology (IR), etc.

In some embodiments, the wireless communication module 670 may be a Bluetooth chip. The device to be charged may be paired with a Bluetooth chip of another electronic device through the Bluetooth chip and establish a wireless connection, so as to realize wireless communication between the device to be charged and the other electronic device through the wireless connection.

In addition, the wireless communication module 670 may also include an antenna. The wireless communication module 670 receives electromagnetic waves via the antenna, modulates the electromagnetic wave signal and performs filtering, and sends the processed signal to the processor 610. The wireless communication module 670 may also receive a signal to be sent from the processor 610, modulate the signal, amplify the signal, and convert it into an electromagnetic wave for radiation via the antenna.

In some embodiments, the charging management module 640 can receive wired charging input from the charging base through the charging interface of the watch. Specifically, the charging management module 640 is connected to the charging interface through a matching circuit. The charging interface can contact the charging contacts of the above-mentioned charging base, and the power is input to the charging interface through the charging contacts. The electrical signal received by the charging interface is transmitted to the charging management module 640 through the matching circuit to wirelessly charge the battery 660.

Among them, the charging management module 640 can also power the antenna while charging the battery 660. The charging management module 640 receives input from the battery 660 and powers the processor 610, the memory 620, the external memory and the wireless communication module 670. The charging management module 640 can also be used to monitor the battery capacity, battery cycle number, battery health status (leakage, impedance) and other parameters of the battery 660. In some other embodiments, the charging management module 640 can also be set in the processor 610.

A touch sensor may be integrated in the display screen 680. The watch may receive control commands from the user to the watch through the display screen 680.

It is understood that the structure shown in this embodiment does not constitute a specific limitation on the watch 200. In other embodiments, the device to be charged may include more or fewer components than shown in the figure, or combine some components, or separate some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

For example, the outer surface of the watch 200 may also include buttons, indicator lights (which may indicate power level, incoming/outgoing calls, pairing mode, etc.), etc. The buttons may be physical buttons or touch buttons (used in conjunction with touch sensors), etc., for triggering operations such as power on, power off, start charging, and stop charging.

An embodiment of the present application also provides a computer storage medium, which includes computer instructions. When the computer instructions are executed on the above-mentioned charging system, the charging base executes each function or step executed by the wireless charging system in the above-mentioned embodiment.

The embodiment of the present application also provides a computer program product. When the computer program product is run on a computer, the computer is enabled to execute each function or step executed by the charging system in the above embodiment.

Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (13)

1. A watch, used for charging on a charging base, characterized in that the watch comprises a first processor, a first charging chip, a first optical communication module, a charging interface, a battery and an optical module, and the first charging chip is a fast charging chip;

   One end of the first optical communication module is electrically connected to the first processor, and the other end is connected to the optical module, the first charging chip is electrically connected to the first processor, the charging interface is electrically connected to the first charging chip, and the first charging chip is connected to the battery;

   The first processor detects the voltage on the charging interface. If the voltage on the charging interface is greater than or equal to a preset threshold voltage, the first processor generates charging demand data and sends it to the first optical communication module. The demand data is used to indicate that the watch is ready for fast charging. The first optical communication module converts the charging demand data from an electrical signal into an optical signal and sends it to the charging base through the optical module.

   The charging interface is used to be electrically connected to the charging base, and the charging chip receives an electrical signal from the charging base through the charging interface to quickly charge the battery.
2. The watch according to claim 1, characterized in that the first optical communication module includes a transmitting end and a receiving end, the optical module includes a transmitting lamp and a receiving tube, the transmitting end of the first optical communication module is electrically connected to the transmitting lamp, and the receiving end of the first optical communication module is electrically connected to the receiving tube;

   The transmitting end of the first optical communication module is used to convert the received electrical signal into an optical signal, and transmit the optical signal to the charging base through the transmitting light;

   The receiving end of the first optical communication module is used to convert the optical signal received by the receiving tube into an electrical signal.
3. The watch according to claim 1 or 2 is characterized in that the watch also includes a PPG module, the PPG module is electrically connected to the optical module, and the first processor controls one of the PPG module and the first optical communication module to maintain a conductive state with the optical module.
4. The watch according to claim 3 is characterized in that the first processor is used to: when the voltage of the charging interface is greater than or equal to the preset threshold voltage, control the first optical communication module and the optical module to remain in a conductive state, and control the PPG module and the optical module to remain in a disconnected state.
5. The watch according to claim 3 is characterized in that the first processor is used to: when it is detected that the voltage on the charging interface is less than the threshold voltage, control the PPG module and the optical module to remain in an on state, and control the first optical communication module and the optical module to remain in a disconnected state.
6. The watch according to any one of claims 1 to 5 is characterized in that the first processor is used to: when the battery is fully charged and the voltage of the charging interface is greater than or equal to a preset threshold voltage, control the first optical communication module to send a full charge signal to the charging base through the optical module.
7. The watch according to claim 6 is characterized in that the first processor is used to: when the first optical communication module receives a response signal from the charging base, control the first optical communication module to remain disconnected from the optical module.
8. A charging base, used for charging a watch, the charging base is connected to a power adapter via a data cable, characterized in that the charging base comprises a second processor, a second charging chip, a second optical communication module, a charging contact and an optical module, and the second charging chip is a fast charging chip;

   One end of the second optical communication module is electrically connected to the optical module, and the other end is electrically connected to the second processor. The second charging chip is electrically connected to the second processor. The charging contact is used to connect to the watch. Electrical connection;

   The optical module receives an optical signal from the watch, and the optical signal is used to instruct the charging base to quickly charge the watch. The second optical communication module converts the optical signal into an electrical signal and sends it to the second processor. The second processor processes the electrical signal and sends it to the second charging chip. The second charging chip sends the electrical signal to the power adapter via the data line, and the power adapter adjusts the charging signal output to the charging base.
9. The charging base according to claim 8, characterized in that the second optical communication module includes a transmitting end and a receiving end, the optical module includes a transmitting lamp and a receiving tube, the transmitting end of the second optical communication module is electrically connected to the transmitting lamp, and the receiving end of the second optical communication module is electrically connected to the receiving tube;

   The transmitting end of the second optical communication module is used to convert the received electrical signal into an optical signal, and transmit the optical signal to the watch through the transmitting light;

   The receiving end of the second optical communication module is used to convert the optical signal received by the receiving tube into an electrical signal.
10. The charging base according to claim 8 or 9 is characterized in that the second processor is used to control the second optical communication module to be in a conducting state when it is detected that the current of the charging contact is greater than or equal to a preset threshold current.
11. The charging base according to claim 8 or 9 is characterized in that the second processor is used to control the second optical communication module to be in a closed state when it is detected that the current of the charging contact is less than a preset threshold current.
12. The charging base according to claim 8 or 9 is characterized in that the second processor is used to: when the second optical communication module receives a full charge signal from the watch, control the second optical communication module to send a response signal to the watch, and then control the second optical communication module to be in a closed state.
13. A charging system, characterized in that it comprises the watch described in any one of claims 1 to 7, and the charging base described in any one of claims 8 to 12.