Signal acquisition and transmission circuit, electronic device and signal transmission system

Abstract

The application relates to a signal acquisition and transmission circuit, an electronic device and a signal transmission system. The signal acquisition and transmission circuit comprises an analog signal acquisition module, a digital signal transmission module and at least one set of light emitting devices and photoelectric devices. The analog signal acquisition module is used for driving the light emitting devices to emit first light signals and obtaining analog signals according to signals from the photoelectric devices. The digital signal transmission module is used for driving the light emitting devices to emit third light signals according to received first digital signals and / or obtaining second digital signals according to signals from the photoelectric devices. The intensity of the third light signals corresponds to the value of the first digital signals, and the value of the second digital signals corresponds to the intensity of the light signals received by the photoelectric devices. Thus, the signal acquisition and transmission circuit can use the devices originally used for signal acquisition to perform signal transmission. When the circuit is applied to a wearable electronic device, the electronic device can realize low-cost and convenient communication.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly to a signal acquisition and transmission circuit, electronic equipment, and signal transmission system. Background Technology

[0002] Wearable devices (such as wristbands, sports watches, and smartwatches) typically have strict waterproof and dustproof requirements, making their external communication interfaces generally wireless. The main implementation methods include wireless communication via Wi-Fi (WLAN) and Bluetooth (BT). For a device to achieve WLAN or BT wireless communication, it requires dedicated hardware and software. The hardware mainly includes dedicated chips (such as WLAN chips and BT chips) and antennas. The cost and connection methods of the chips and antennas impose constraints on the device's hardware cost and structure. The software needs to set up corresponding protocol stacks (such as WLAN protocol stacks and BT protocol stacks). The connection logic of the protocol stack is highly dependent on the upper-layer application, making its implementation very complex and data transmission costs relatively high.

[0003] Therefore, how to enable wearable devices to achieve low-cost and convenient communication is an urgent problem to be solved in this field. Summary of the Invention

[0004] In view of this, a signal acquisition and transmission circuit, an electronic device, and a signal transmission system are proposed. The signal acquisition and transmission circuit according to the embodiments of this application can use devices originally used for signal acquisition for signal transmission. When this circuit is applied to wearable electronic devices, it enables the electronic devices to achieve low-cost and convenient communication.

[0005] In a first aspect, embodiments of this application provide a signal acquisition and transmission circuit, the circuit comprising: an analog signal acquisition module, a digital signal transmission module, and at least one set of light-emitting devices and photoelectric devices. For each set of light-emitting devices and photoelectric devices: the analog signal acquisition module is used to drive the light-emitting device to emit a first light signal and obtain an analog signal based on the signal from the photoelectric device, wherein the signal from the photoelectric device is generated by the photoelectric device based on a received second light signal, the second light signal being obtained by reflection of the first light signal; the digital signal transmission module is used to drive the light-emitting device to emit a third light signal based on the received first digital signal, and / or obtain a second digital signal based on the signal from the photoelectric device, wherein the intensity of the third light signal corresponds to the value of the first digital signal, and the value of the second digital signal corresponds to the intensity of the light signal received by the photoelectric device.

[0006] According to the signal acquisition and transmission circuit of this application embodiment, the analog signal acquisition module drives the light-emitting device to emit a first light signal and obtains an analog signal based on the signal from the photoelectric device. The signal from the photoelectric device is generated by the photoelectric device based on a received second light signal, which is obtained by reflecting the first light signal. Therefore, in the signal acquisition and transmission circuit of this application embodiment, the analog signal acquisition module, in conjunction with the light-emitting device and the photoelectric device, can complete the work of analog signal acquisition. The digital signal transmission module drives the light-emitting device to emit a third light signal based on the received first digital signal, and / or obtains a second digital signal based on the signal from the photoelectric device. The intensity of the third light signal corresponds to the value of the first digital signal, enabling the digital signal transmission module, in conjunction with the light-emitting device, to output a digital signal in the form of an optical signal corresponding to the digital signal. The value of the second digital signal corresponds to the intensity of the optical signal received by the photoelectric device, enabling the digital signal transmission module, in conjunction with the photoelectric device, to receive a digital signal in the form of an optical signal corresponding to the digital signal. In other words, the digital signal transmission module, in conjunction with the light-emitting device and photoelectric device originally used for analog signal acquisition, can complete the work of digital signal transmission. In this way, the signal acquisition and transmission circuit according to the embodiments of this application can use the devices originally used for signal acquisition for signal transmission. When the circuit is applied to wearable electronic devices, it enables the electronic devices to achieve low-cost and convenient communication.

[0007] According to the first aspect, in a first possible implementation of the signal acquisition and transmission circuit, the circuit further includes at least one switching module. Each switching module is connected to the analog signal acquisition module, the digital signal transmission module, and a set of light-emitting devices and photoelectric devices. For each switching module and the set of light-emitting devices and photoelectric devices connected to it: the switching module is used to control the analog signal acquisition module to connect to the light-emitting devices and photoelectric devices, and to control the digital signal transmission module to connect to the light-emitting devices and / or the photoelectric devices, wherein the same light-emitting device or the same photoelectric device is not simultaneously connected to the analog signal acquisition module and the digital signal transmission module.

[0008] In this way, the signal acquisition and transmission circuit can switch between different functions of analog signal acquisition and digital signal transmission, improving the flexibility of the signal acquisition and transmission circuit's operation and ensuring the accuracy of the analog and second digital signals obtained by the signal acquisition and transmission circuit.

[0009] According to the first possible implementation of the first aspect, in the second possible implementation of the signal acquisition and transmission circuit, when the digital signal transmission module is connected to the light-emitting device, the digital signal transmission module drives the light-emitting device to emit the third light signal according to the received first digital signal; when the digital signal transmission module is connected to the optoelectronic device, the digital signal transmission module obtains the second digital signal according to the signal from the optoelectronic device; when the digital signal transmission module is connected to both the light-emitting device and the optoelectronic device, the digital signal transmission module drives the light-emitting device to emit the third light signal according to the received first digital signal, and obtains the second digital signal according to the signal from the optoelectronic device.

[0010] In this way, the various connection methods between the digital signal transmission module and the light-emitting device and optoelectronic device can be applied to scenarios of digital signal output in the form of optical signals, scenarios of digital signal reception in the form of optical signals, and scenarios where digital signal output and reception in the form of optical signals are carried out simultaneously. This makes the connection methods of each module and device of the signal acquisition and transmission circuit more adaptable to different application scenarios while ensuring that the digital signal transmission requirements are met.

[0011] According to the first or second possible implementation of the first aspect, in the third possible implementation of the signal acquisition and transmission circuit, the digital signal transmission module includes a first transmission unit and a second transmission unit. When the switching module controls the first transmission unit to connect to the light-emitting device and the first transmission unit receives the first digital signal, the first transmission unit is used to drive the light-emitting device to emit the third light signal according to the first digital signal. When the switching module controls the second transmission unit to connect to the optoelectronic device and the second transmission unit receives a signal from the optoelectronic device, the second transmission unit is used to obtain the second digital signal according to the signal from the optoelectronic device.

[0012] The connection methods between the first transmission unit and the light-emitting device, and between the second transmission unit and the optoelectronic device, are controlled by the switching module, enabling the digital signal transmission module to transmit digital signals in conjunction with the light-emitting device and / or the optoelectronic device. When the digital signal transmission requirement is to emit a digital signal in the form of an optical signal, ensuring the first transmission unit functions normally is sufficient. When the digital signal transmission requirement is to receive a digital signal in the form of an optical signal, ensuring the second transmission unit functions normally is sufficient. By separately configuring the first and second transmission units and controlling the connection methods between the first transmission unit and the light-emitting device, and between the second transmission unit and the optoelectronic device, the first or second transmission unit can be disconnected from the light-emitting device and optoelectronic device when not in use. This reduces the complexity of controlling the device connection methods in the switching module and lowers the power consumption required for the digital signal transmission module to maintain normal device operation.

[0013] According to the third possible implementation of the first aspect, in the fourth possible implementation of the signal acquisition and transmission circuit, the switching module includes a switching control unit, a first switch, and a second switch. The control terminal of the first switch is connected to the first terminal of the switching control unit, the first terminal of the first switch is connected to the cathode of the light-emitting device, the second terminal of the first switch is connected to the first transmission unit, and the anode of the light-emitting device is connected to a current source. The control terminal of the second switch is connected to the second terminal of the switching control unit, the first terminal of the second switch is connected to the cathode of the photoelectric device, the second terminal of the second switch is connected to the second transmission unit and a bias source, and the anode of the photoelectric device is connected to ground.

[0014] According to the third or fourth possible implementation of the first aspect, in the fifth possible implementation of the signal acquisition and transmission circuit, the analog signal acquisition module includes a first acquisition unit and a second acquisition unit. When the switching module controls the first acquisition unit to connect to the light-emitting device and the first acquisition unit receives an analog signal acquisition command, the first acquisition unit is used to drive the light-emitting device to emit the first light signal. When the switching module controls the second acquisition unit to connect to the optoelectronic device and the second acquisition unit receives a signal from the optoelectronic device, the second acquisition unit is used to obtain the analog signal based on the signal from the optoelectronic device.

[0015] The switching module controls the connection between the first acquisition unit and the light-emitting device, and the second acquisition unit and the photoelectric device, enabling the analog signal acquisition module to acquire analog signals by combining the light-emitting device and the photoelectric device. Furthermore, the switching module can also control the connection between the first transmission unit and the light-emitting device, and the second transmission unit and the photoelectric device, allowing the digital signal transmission module to transmit digital signals by combining the same light-emitting device and photoelectric device. Therefore, the light-emitting device and the photoelectric device can be multiplexed in the signal acquisition and transmission circuit. This allows the signal acquisition and transmission circuit to still perform analog signal acquisition and digital signal transmission even with only one set of light-emitting devices and photoelectric devices, reducing the hardware cost of the circuit.

[0016] According to the fifth possible implementation of the first aspect, in the sixth possible implementation of the signal acquisition and transmission circuit, the switching module includes a switching control unit, a first switch, and a second switch. The control terminal of the first switch is connected to the first terminal of the switching control unit, the first terminal of the first switch is connected to the cathode of the light-emitting device, the third terminal of the first switch is connected to the first acquisition unit, and the anode of the light-emitting device is connected to a current source. The control terminal of the second switch is connected to the second terminal of the switching control unit, the first terminal of the second switch is connected to the cathode of the photoelectric device, the third terminal of the second switch is connected to the second acquisition unit, and the anode of the photoelectric device is connected to ground.

[0017] According to the fifth or sixth possible implementation of the first aspect, in the seventh possible implementation of the signal acquisition and transmission circuit, the signal acquisition and transmission circuit is further connected to a control circuit, and the switching module is used to receive a control signal from the control circuit, and control the first acquisition unit and the second acquisition unit to connect to the light-emitting device and the optoelectronic device according to the control signal, or control the first transmission unit to connect to the light-emitting device and / or the second transmission unit to connect to the optoelectronic device.

[0018] In this way, a signal acquisition and transmission circuit consisting of only one set of light-emitting devices and optoelectronic devices can switch between analog signal acquisition and digital signal transmission functions, enabling the signal acquisition and transmission circuit to perform more functions at a lower hardware cost.

[0019] Secondly, embodiments of this application provide an electronic device, including a signal acquisition and transmission circuit and a control circuit, comprising one or more of the first aspects or various possible implementations thereof. The control circuit is configured to: upon receiving an analog signal acquisition command, output a control signal to the signal acquisition and transmission circuit according to the analog signal acquisition command, wherein the control signal is used to control the analog signal acquisition module to connect to one or more light-emitting devices and one or more optoelectronic devices; upon receiving a digital signal transmission command, output a control signal to the signal acquisition and transmission circuit according to the digital signal transmission command, wherein the control signal is used to control the digital signal transmission module to connect to one or more light-emitting devices and / or one or more optoelectronic devices; upon receiving both the analog signal acquisition command and the digital signal transmission command, output a control signal to the signal acquisition and transmission circuit according to the analog signal acquisition command and the digital signal transmission command, wherein the control signal is used to control the analog signal acquisition module to connect to one or more light-emitting devices and one or more optoelectronic devices, and to control the digital signal transmission module to connect to one or more light-emitting devices and / or one or more optoelectronic devices, wherein the same light-emitting device or the same optoelectronic device is not simultaneously connected to the analog signal acquisition module and the digital signal transmission module.

[0020] Thirdly, embodiments of this application provide a signal transmission system, including a first electronic device and a second electronic device. The first electronic device and the second electronic device are respectively electronic devices of the second aspect. When the digital signal transmission module of the first electronic device drives the light-emitting device in the first electronic device to emit a third light signal according to the received first digital signal, the light signal received by the photoelectric device of the second electronic device is the third light signal. The second digital signal obtained by the digital signal transmission module of the second electronic device according to the signal from the photoelectric device in the second electronic device is the same as the first digital signal.

[0021] These and other aspects of this application will become more apparent in the description of the following embodiments(s). Attached Figure Description

[0022] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0023] Figure 1 This demonstrates the principle of analog signal acquisition achieved by wearable devices in the prior art.

[0024] Figure 2 This illustrates an example of how wearable devices in the prior art achieve signal transmission.

[0025] Figure 3This illustrates an example of how wearable devices in the prior art achieve signal transmission.

[0026] Figure 4a This illustrates an exemplary application scenario of a signal acquisition and transmission circuit according to an embodiment of this application.

[0027] Figure 4b This illustrates another exemplary application scenario of the signal acquisition and transmission circuit according to an embodiment of this application.

[0028] Figure 5 A schematic diagram showing an exemplary structure of a signal acquisition and transmission circuit according to an embodiment of this application is provided.

[0029] Figure 6 A schematic diagram showing an exemplary structure of a signal acquisition and transmission circuit 80 according to an embodiment of this application is provided.

[0030] Figure 7 A schematic diagram showing an exemplary structure of a digital signal transmission module 40 according to an embodiment of this application.

[0031] Figure 8 A schematic diagram showing an exemplary structure of the switching module 60 according to an embodiment of this application.

[0032] Figure 9 A schematic diagram showing an exemplary structure of the first transmission unit 202 according to an embodiment of this application.

[0033] Figure 10 A schematic diagram showing an exemplary structure of the second transmission unit 204 according to an embodiment of this application.

[0034] Figure 11 A schematic diagram showing an exemplary structure of an analog signal acquisition module 20 according to an embodiment of this application is provided.

[0035] Figure 12 A schematic diagram showing an exemplary structure of the switching module 60 according to an embodiment of this application.

[0036] Figure 13 A schematic diagram illustrating an exemplary structure of an electronic device according to an embodiment of this application is shown.

[0037] Figure 14 A schematic diagram of an exemplary structure of a signal transmission system according to an embodiment of this application is shown.

[0038] Figure 15 An application example of a signal transmission system according to an embodiment of this application is shown. Detailed Implementation

[0039] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0040] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0041] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0042] The following is an explanation of the terms used in this article.

[0043] Analog front end (AFE): An analog signal acquisition device. Existing analog front ends are generally used in a variety of ways. Among them, analog front ends suitable for consumer products are called optical biosensor analog front ends, which can be used for heart rate and blood oxygen detection.

[0044] Vertical-cavity surface-emitting laser (VCSEL): Its laser is emitted perpendicularly to the top surface. Unlike lasers that use cut-out independent chips (edge-emitting lasers), the signal detection in a VCSEL can be performed directly on the chip before the individual light-emitting units are divided into separate units.

[0045] ISM radio frequency band: a radio frequency band primarily open to use by industrial, scientific, and medical institutions.

[0046] The following section introduces existing signal transmission schemes for wearable devices.

[0047] The main functions of existing wearable devices are generally related to the user's health monitoring, such as the ability to collect analog signals such as the user's heart rate and blood oxygen signals, and to analyze and transmit the collected analog signals.

[0048] Figure 1 This illustrates the principle behind analog signal acquisition in existing wearable devices. For example... Figure 1As shown, the hardware used in existing wearable devices includes a signal acquisition module implemented through an analog front-end (AFE), and light-emitting devices such as light-emitting diodes (LEDs) and photoelectric devices such as photodiodes (PDs) that receive external light signals and convert them into electrical signals. The signal acquisition module controls the LEDs to emit light signals that illuminate the user's skin. Red blood cells in the blood vessels beneath the user's skin absorb and reflect the light signals. The reflected light signals illuminate the photoelectric devices (PDs), causing them to generate electrical signals. These electrical signals are further processed by the signal acquisition module to obtain corresponding analog signals. Through the aforementioned principles of optical illumination and reflection, analog signals such as the user's heart rate and blood oxygenation are acquired.

[0049] The acquired analog signals may need to be transmitted to other devices or equipment. Figure 2 and Figure 3 Each example illustrates a wearable device implementing signal transmission in the prior art.

[0050] like Figure 2 As shown, one signal transmission method for existing wearable devices is to transmit signals from the wearable device to other devices via WiFi technology. WiFi is a technology that allows electronic devices to connect to a wireless local area network (WLAN). This technology typically uses the 2.4 GHz ultra-high frequency (UHF) or 5 GHz super high frequency (SHF) ISM radio frequency bands for communication. It requires a dedicated WiFi chip to wirelessly transmit signals to other devices to complete data transmission. Common communication interface types for WiFi chips include Secure Digital Input and Output (SDIO), Universal Serial Bus (USB), and Peripheral Component Interconnect Express (PCIe). Therefore, a high-performance main control chip is generally required to complete signal communication. Furthermore, an antenna of the corresponding frequency band is needed to propagate the signal in space. On the software side, a corresponding WLAN protocol stack needs to be configured. The connection logic of the WLAN protocol stack is highly dependent on the upper-layer application, making its implementation complex and data transmission costly.

[0051] Since WiFi communication requires the cooperation of both hardware and software, the hardware side requires dedicated WiFi chips and antennas, which results in high hardware costs, power consumption and connection configuration complexity. The software side requires setting up a WLAN protocol stack, which also leads to high data processing costs. As a result, this solution has the disadvantages of high power consumption, high cost and complex connection configuration.

[0052] like Figure 3 As shown, another signal transmission method for wearable devices in the prior art is through Bluetooth technology. Bluetooth is a common wireless communication method that requires a dedicated Bluetooth chip (BT chip) to wirelessly transmit signals to other devices to complete data transmission. Common communication interfaces for Bluetooth chips are Universal Asynchronous Receiver / Transmitter (UART) and Inter-IC Sound (I2S), thus requiring a main control chip to complete communication. Furthermore, an antenna of the corresponding frequency band is needed for signal propagation. On the software side, a corresponding BT protocol stack needs to be set up. The connection logic of the BT protocol stack is highly dependent on the upper-layer application, making implementation complex and data transmission costly.

[0053] Since Bluetooth communication requires the cooperation of both hardware and software, the hardware side requires a dedicated Bluetooth chip and antenna, while the software side requires setting up a Bluetooth protocol stack. Although the hardware cost and data transmission cost of this solution are lower than those of WiFi communication, the Bluetooth communication solution still has the disadvantage of complex connection configuration.

[0054] In view of this, a signal acquisition and transmission circuit, an electronic device, and a signal transmission system are proposed. The signal acquisition and transmission circuit according to the embodiments of this application can use devices originally used for signal acquisition for signal transmission. When this circuit is applied to wearable electronic devices, it enables the electronic devices to achieve low-cost and convenient communication.

[0055] Figure 4a This illustrates an exemplary application scenario of a signal acquisition and transmission circuit according to an embodiment of this application.

[0056] like Figure 4a As shown, this application scenario is an analog signal acquisition application scenario. This application scenario may include an electronic device, which may be equipped with a signal acquisition and transmission circuit according to the embodiments of this application. The electronic device may be a wearable electronic device such as a smart bracelet, smartwatch, etc., and may include at least one set of light-emitting devices 304 and photoelectric devices 301. Figure 4a (Taking one group as an example). In Figure 4a In this application scenario, the electronic device can be in a normally worn state, meaning the light-emitting device 304 is positioned where its emitted light signal can illuminate the user's skin, and the photoelectric device 301 is positioned to receive the light signal reflected by red blood cells in the blood vessels beneath the user's skin. In this case, the signal acquisition and transmission circuit of the electronic device can drive the light-emitting device 304 to emit a light signal. This light signal is reflected by the red blood cells in the blood vessels beneath the user's skin, and the reflected light signal is received by the photoelectric device 301 and converted into an electrical signal. Other modules of the signal acquisition and transmission circuit will receive the electrical signal from the photoelectric device 301 and further process it to obtain analog signals indicating the user's physiological information such as heart rate and blood oxygenation. This method enables the acquisition of analog signals.

[0057] Figure 4b This illustrates another exemplary application scenario of the signal acquisition and transmission circuit according to an embodiment of this application.

[0058] like Figure 4b As shown, this application scenario is a digital signal transmission application scenario. This application scenario may include two electronic devices, wherein the first electronic device and the second electronic device are respectively provided with signal acquisition and transmission circuits according to embodiments of this application. The first electronic device and the electronic device may be smartphones, netbooks, tablets, laptops, wearable electronic devices (such as smart bracelets, smartwatches, etc.), TVs, virtual reality devices, speakers, electronic ink, etc., and may include at least one set of light-emitting devices 304 and photoelectric devices 301. Figure 4b (Taking one group as an example).

[0059] exist Figure 4bIn this application scenario, the light-emitting device 304 and photoelectric device 301 of the first electronic device and the light-emitting device 304 and photoelectric device 301 of the second electronic device can be located in a relatively close spatial position. That is, when the light-emitting device 304 of the first electronic device emits a light signal, the photoelectric device 301 of the second electronic device can receive the light signal, and vice versa. In this case, when the first electronic device transmits a digital signal to the second electronic device, the signal acquisition and transmission circuit of the first electronic device can drive the light-emitting device 304 of the first electronic device to emit a light signal according to the digital signal to be transmitted. This light signal is received by the photoelectric device 301 of the second electronic device and converted into an electrical signal. Other modules of the signal acquisition and transmission circuit of the second electronic device receive the electrical signal and further process it to obtain a digital signal that is the same as the digital signal to be transmitted by the first electronic device. Accordingly, when the second electronic device transmits a digital signal to the first electronic device, the signal acquisition and transmission circuit of the second electronic device can drive the light-emitting device 304 of the second electronic device to emit a light signal according to the digital signal to be transmitted. This light signal is received by the photoelectric device 301 of the first electronic device and converted into an electrical signal. Other modules of the signal acquisition and transmission circuit of the first electronic device receive the electrical signal and further process it to obtain a digital signal that is the same as the digital signal to be transmitted by the second electronic device. In this way, the transmission of digital signals can be realized.

[0060] In one example Figure 4b The application scenario can be wireless charging of a first electronic device, which could be a wearable device, and a second electronic device, such as a charging dock or wireless charger. The signal transmitted between the first and second electronic devices can be, for example, a digital signal indicating charging parameters. For instance, after the processor (not shown) of the second electronic device determines the charging parameters it supports, it obtains a string corresponding to those parameters (including at least one digital signal) and drives the light-emitting device of the second electronic device to turn on and off according to the values ​​of the digital signals in the string. The photoelectric device of the first electronic device can then output a corresponding electrical signal based on the on / off state of the light-emitting device of the second electronic device. This signal is then sent to other modules in the signal acquisition and transmission circuit of the first electronic device for further processing and reconstruction of the string corresponding to the charging parameters, thus completing the transmission of the digital signal.

[0061] exist Figure 4b In application scenarios where the first or second electronic device is a wearable electronic device, the first or second electronic device can also be used in... Figure 4aThe application scenario is illustrated. Further, when the first or second electronic device includes two or more sets of light-emitting devices 304 and photoelectric devices 301, the first or second electronic device can simultaneously acquire analog signals and transmit digital signals. For example, after acquiring the analog signal, a processor (not shown) on the first or second electronic device can first process it to obtain a digital signal corresponding to the analog signal, and then transmit the digital signal to the second or first electronic device in real time. As another example, while acquiring analog signals, the first or second electronic device can also send other types of digital signals (such as digital signals generated by the processor indicating device power levels, or digital signals indicating device malfunction information, etc.) to the second or first electronic device.

[0062] Figure 5 A schematic diagram showing an exemplary structure of a signal acquisition and transmission circuit according to an embodiment of this application is provided.

[0063] like Figure 5 As shown, in one possible implementation, this application proposes a signal acquisition and transmission circuit 80, which includes: an analog signal acquisition module 20, a digital signal transmission module 40, and at least one set of light-emitting devices 304 and photoelectric devices 301.

[0064] For each group of light-emitting devices 304 and optoelectronic devices 301:

[0065] The analog signal acquisition module 20 is used to drive the light-emitting device 304 to emit a first light signal E1 and obtain an analog signal V1 based on the signal I1 from the photoelectric device 301, wherein the signal I1 from the photoelectric device 301 is generated by the photoelectric device 301 based on the received second light signal E2, and the second light signal E2 is obtained by reflecting the first light signal E1.

[0066] The digital signal transmission module 40 is used to drive the light-emitting device 304 to emit a third light signal E3 according to the received first digital signal D1, and / or obtain a second digital signal D2 according to the signal I2 from the photoelectric device 301, wherein the intensity of the third light signal E3 corresponds to the value of the first digital signal D1, and the value of the second digital signal D2 corresponds to the intensity of the light signal E4 received by the photoelectric device 301.

[0067] The signal acquisition and transmission circuit 80 can be installed on a certain electronic device. The signal I2 from the photoelectric device 301 can be the signal generated by the photoelectric device 301 of the electronic device according to the optical signal E4. The optical signal E4 can be the optical signal from another electronic device (for example, when the other electronic device also includes a signal acquisition and transmission circuit, the optical signal E4 can come from the light-emitting device of the other electronic device).

[0068] In one example, when the signal acquisition and transmission circuit 80 is applied to an electronic device, the analog signal acquisition module 20 and the digital signal transmission module 40 can be mounted on the analog front-end AFE chip, and the light-emitting device 304 and the optoelectronic device 301 can serve as auxiliary hardware for the analog front-end AFE chip. In another example, the analog signal acquisition module 20, the digital signal transmission module 40, the light-emitting device 304, and the optoelectronic device 301 can also be mounted on the same chip. This application does not limit the specific arrangement of the modules and devices included in the signal acquisition and transmission circuit 80.

[0069] The light-emitting device 304 can be a vertical-cavity surface-emitting laser, a red light-emitting diode, a green light-emitting diode, an infrared light-emitting diode, etc., and the optoelectronic device 301 can be of a type corresponding to the light-emitting device 304. This application does not limit the specific types of the light-emitting device 304 and the optoelectronic device 301.

[0070] According to the signal acquisition and transmission circuit of this application embodiment, the analog signal acquisition module drives the light-emitting device to emit a first light signal and obtains an analog signal based on the signal from the photoelectric device. The signal from the photoelectric device is generated by the photoelectric device based on a received second light signal, which is obtained by reflecting the first light signal. Therefore, in the signal acquisition and transmission circuit of this application embodiment, the analog signal acquisition module, in conjunction with the light-emitting device and the photoelectric device, can complete the work of analog signal acquisition. The digital signal transmission module drives the light-emitting device to emit a third light signal based on the received first digital signal, and / or obtains a second digital signal based on the signal from the photoelectric device. The intensity of the third light signal corresponds to the value of the first digital signal, enabling the digital signal transmission module, in conjunction with the light-emitting device, to output a digital signal in the form of an optical signal corresponding to the digital signal. The value of the second digital signal corresponds to the intensity of the optical signal received by the photoelectric device, enabling the digital signal transmission module, in conjunction with the photoelectric device, to receive a digital signal in the form of an optical signal corresponding to the digital signal. In other words, the digital signal transmission module, in conjunction with the light-emitting device and photoelectric device originally used for analog signal acquisition, can complete the work of digital signal transmission. In this way, the signal acquisition and transmission circuit according to the embodiments of this application can use the devices originally used for signal acquisition for signal transmission. When the circuit is applied to wearable electronic devices, it enables the electronic devices to achieve low-cost and convenient communication.

[0071] As described above, the same group of light-emitting devices 304 and photoelectric devices 301 can work together with either the analog signal acquisition module 20 or the digital signal transmission module 40. Therefore, to avoid confusion regarding the operating modes of the same group of light-emitting devices 304 and photoelectric devices 301, the connection method between the analog signal acquisition module 20, the digital signal transmission module 40, and the light-emitting devices 304 and photoelectric devices 301 in the signal acquisition and transmission circuit 80 can be further configured. Figure 6 A schematic diagram showing an exemplary structure of a signal acquisition and transmission circuit 80 according to an embodiment of this application is provided.

[0072] like Figure 6 As shown, in one possible implementation, the circuit 80 further includes at least one switching module 60, each switching module 60 being connected to the analog signal acquisition module 20, the digital signal transmission module 40, and a set of light-emitting devices 304 and photoelectric devices 301, respectively. For each switching module 60 and its connected set of light-emitting devices 304 and photoelectric devices 301:

[0073] The switching module 60 is used to control the analog signal acquisition module 20 to connect to the light-emitting device 304 and the photoelectric device 301, and to control the digital signal transmission module 40 to connect to the light-emitting device 304 and / or the photoelectric device 301, wherein the same light-emitting device 304 or the same photoelectric device 301 is not simultaneously connected to the analog signal acquisition module 20 and the digital signal transmission module 40.

[0074] In this way, the signal acquisition and transmission circuit can switch between different functions of analog signal acquisition and digital signal transmission, improving the flexibility of the signal acquisition and transmission circuit's operation and ensuring the accuracy of the analog and second digital signals obtained by the signal acquisition and transmission circuit.

[0075] For example, at least one switching module 60 can be provided in the signal acquisition and transmission circuit 80 to control the connection mode of at least one set of light-emitting devices 304, photoelectric devices 301 with the analog signal acquisition module 20 and the digital signal transmission module 40 respectively. Each switching module 60 can be connected to its corresponding set of light-emitting devices 304, photoelectric devices 301, analog signal acquisition module 20, and digital signal transmission module 40. Therefore, each switching module 60 can be used to control the connection mode of its corresponding set of light-emitting devices 304, photoelectric devices 301 with the analog signal acquisition module 20 and the digital signal transmission module 40. For example... Figure 6 The switching module 60 shown can control the analog signal acquisition module 20 to connect to the light-emitting device 304 and the photoelectric device 301, and control the digital signal transmission module 40 to connect to the light-emitting device 304 and / or the photoelectric device 301. Specifically, when the switching module 60 controls the analog signal acquisition module 20 to connect to the light-emitting device 304 and the photoelectric device 301, the signal acquisition and transmission circuit 80 can be used to achieve analog signal acquisition; when the switching module 60 controls the digital signal transmission module 40 to connect to the light-emitting device 304 and / or the photoelectric device 301, the signal acquisition and transmission circuit 80 can be used to achieve digital signal transmission. Examples of analog signal acquisition and digital signal transmission can be found below. Figures 11-12 and Figures 8-10 Related descriptions.

[0076] As described above, both analog signal acquisition and digital signal transmission involve light emission from a light-emitting device and reception and further processing of the light signal by a photoelectric device. Therefore, if the same light-emitting device 304 or the same photoelectric device 301 is simultaneously connected to both the analog signal acquisition module 20 and the digital signal transmission module 40, the light-emitting device 304 or the photoelectric device 301 will fail to accurately complete the aforementioned analog signal acquisition and digital signal transmission tasks due to functional conflicts. Based on this, the same light-emitting device 304 or the same photoelectric device 301 can be configured not to be simultaneously connected to both the analog signal acquisition module 20 and the digital signal transmission module 40 to ensure the accuracy of the signals acquired and transmitted by the signal acquisition and transmission circuit 80.

[0077] When the signal acquisition and transmission circuit 80 of this application embodiment performs the digital signal transmission function, the signal transmission effect achieved by the signal acquisition and transmission circuit 80 may be different depending on the different connection methods between the digital signal transmission module 40 and the light-emitting device 304 and the photoelectric device 301.

[0078] In one possible implementation, when the digital signal transmission module 40 is connected to the light-emitting device 304, the digital signal transmission module 40 drives the light-emitting device 304 to emit the third light signal E3 according to the received first digital signal D1.

[0079] When the digital signal transmission module 40 is connected to the optoelectronic device 301, the digital signal transmission module 40 obtains the second digital signal D2 based on the signal from the optoelectronic device 301.

[0080] When the digital signal transmission module 40 connects the light-emitting device 304 and the photoelectric device 301, the digital signal transmission module drives the light-emitting device 304 to emit a third light signal E3 according to the received first digital signal D1, and obtains a second digital signal D2 according to the signal from the photoelectric device 301.

[0081] In this way, the various connection methods between the digital signal transmission module and the light-emitting device and optoelectronic device can be applied to scenarios of digital signal output in the form of optical signals, scenarios of digital signal reception in the form of optical signals, and scenarios where digital signal output and reception in the form of optical signals are carried out simultaneously. This makes the connection methods of each module and device of the signal acquisition and transmission circuit more adaptable to different application scenarios while ensuring that the digital signal transmission requirements are met.

[0082] For example, when the signal acquisition and transmission circuit 80 performs the signal transmission function, it can be in, for example... Figure 4b In certain application scenarios, the signal acquisition and transmission circuit 80 can be, for example, installed on the first electronic device.

[0083] When the digital signal transmission module 40 is connected to the light-emitting device 304, the digital signal transmission module 40 has the conditions to drive the light-emitting device 304. In this connection method, if the digital signal transmission module 40 receives the first digital signal D1, it can be considered that the first digital signal D1 is the signal that the first electronic device wants to transmit to the second electronic device. The digital signal transmission module 40 can drive the light-emitting device 304 to emit a third optical signal E3. This third optical signal E3 can be received and processed by the photoelectric device of the second electronic device to obtain a corresponding digital signal. The digital signal obtained by the second electronic device from the processing of the third optical signal E3 can have the same value as the first digital signal D1. This is equivalent to the signal acquisition and transmission circuit 80 converting the digital signal into an optical signal and outputting it, thus completing the digital signal output.

[0084] When the digital signal transmission module 40 is connected to the optoelectronic device 301, the digital signal transmission module 40 has the capability to receive and process signals from the optoelectronic device 301. In this connection method, if the digital signal transmission module 40 receives a signal from the optoelectronic device 301, it can be assumed that the signal from the optoelectronic device 301 is a signal generated by the optoelectronic device 301 in response to an optical signal emitted by the second electronic device. The optical signal emitted by the second electronic device can be an optical signal emitted by the second electronic device according to the digital signal to be transmitted. The digital signal transmission module 40 can further process the signal from the optoelectronic device 301 to obtain a second digital signal D2. The value of the second digital signal D2 can be the same as the value of the digital signal to be transmitted by the second electronic device. This is equivalent to the signal acquisition and transmission circuit 80 completing the reception of the digital signal by receiving the optical signal and converting it into a digital signal.

[0085] When the digital signal transmission module 40 connects the light-emitting device 304 and the photoelectric device 301, the digital signal transmission module 40 simultaneously has the capability to drive the light-emitting device 304 and receive and process signals from the photoelectric device 301. In this connection method, if the digital signal transmission module 40 receives the first digital signal D1, it can be considered that the first digital signal D1 is the signal to be transmitted from the first electronic device to the second electronic device. The digital signal transmission module 40 can then drive the light-emitting device 304 to emit a third light signal E3. If the digital signal transmission module 40 receives a signal from the photoelectric device 301, it can be considered that the signal from the photoelectric device 301 is a signal generated by the photoelectric device 301 in response to the light signal emitted by the second electronic device. The digital signal transmission module 40 can further process the signal from the photoelectric device 301 to obtain the second digital signal D2. The light emission signal emitted by the light-emitting device 304 and the light reception signal received by the photoelectric device 301 do not conflict. Therefore, the digital signal transmission module 40 can drive the light-emitting device 304 and the signal processing from the photoelectric device 301 to obtain the second digital signal simultaneously. This is equivalent to the signal acquisition and transmission circuit 80 completing the output of the digital signal by converting the digital signal into an optical signal and outputting it. At the same time, it also completes the reception of the digital signal by receiving the optical signal and converting it into a digital signal.

[0086] The exemplary structure and function of the digital signal transmission module 40 according to embodiments of this application are described below. Figure 7 A schematic diagram showing an exemplary structure of a digital signal transmission module 40 according to an embodiment of this application.

[0087] like Figure 7 As shown, in one possible implementation, the digital signal transmission module 40 includes a first transmission unit 202 and a second transmission unit 204.

[0088] When the switching module 60 controls the first transmission unit 202 to connect to the light-emitting device 304, and the first transmission unit 202 receives the first digital signal D1, the first transmission unit 202 is used to drive the light-emitting device 304 to emit the third light signal E3 according to the first digital signal D1.

[0089] When the switching module 60 controls the second transmission unit 204 to connect to the optoelectronic device 301, and the second transmission unit 204 receives the signal I2 from the optoelectronic device 301, the second transmission unit 304 is used to obtain the second digital signal D2 based on the signal I2 from the optoelectronic device 301.

[0090] The connection methods between the first transmission unit and the light-emitting device, and between the second transmission unit and the optoelectronic device, are controlled by the switching module, enabling the digital signal transmission module to transmit digital signals in conjunction with the light-emitting device and / or the optoelectronic device. When the digital signal transmission requirement is to emit a digital signal in the form of an optical signal, ensuring the first transmission unit functions normally is sufficient. When the digital signal transmission requirement is to receive a digital signal in the form of an optical signal, ensuring the second transmission unit functions normally is sufficient. By separately configuring the first and second transmission units and controlling the connection methods between the first transmission unit and the light-emitting device, and between the second transmission unit and the optoelectronic device, the first or second transmission unit can be disconnected from the light-emitting device and optoelectronic device when not in use. This reduces the complexity of controlling the device connection methods in the switching module and lowers the power consumption required for the digital signal transmission module to maintain normal device operation.

[0091] For example, the digital signal transmission module 40 may include two units: a first transmission unit 202 and a second transmission unit 204. The first transmission unit 202 is responsible for receiving a first digital signal D1 and driving the light-emitting device 304 to emit light according to the first digital signal D1. The second transmission unit 204 is responsible for processing the signal I2 from the photoelectric device 301 to obtain a second digital signal D2. The switching module 60 can be used to control the first transmission unit 202 to connect to the light-emitting device 304, that is, to enable the digital signal transmission module 40 to connect to the light-emitting device 304, so that the first transmission unit 202 in the digital signal transmission module 40 can respond to the received first digital signal D1. The switching module 60 can also be used to control the second transmission unit 204 to connect to the photoelectric device 301, that is, to enable the digital signal transmission module 40 to connect to the photoelectric device 301, so that the second transmission unit 204 in the digital signal transmission module 40 can receive the signal I2 from the photoelectric device 301 and respond.

[0092] The following provides an exemplary structure of the switching module 60, the first transmission unit 202, and the second transmission unit 204. Based on the exemplary structure of the switching module 60, the first transmission unit 202, and the second transmission unit 204, the principle of the first transmission unit 202 driving the light-emitting device 304 and the second transmission unit 204 to obtain the second digital signal D2 is introduced.

[0093] Figure 8 A schematic diagram showing an exemplary structure of the switching module 60 according to an embodiment of this application.

[0094] like Figure 8 As shown, in one possible implementation, the switching module 60 includes a switching control unit 206, a first switch S1, and a second switch S2.

[0095] The control terminal s10 of the first switch S1 is connected to the first terminal p1 of the switching control unit 206, the first terminal s11 of the first switch S1 is connected to the cathode m1 of the light-emitting device 304, the second terminal s12 of the first switch S1 is connected to the first transmission unit 202, and the anode n1 of the light-emitting device 304 is connected to the current source 208.

[0096] The control terminal s20 of the second switch S2 is connected to the second terminal p2 of the switching control unit 206, the first terminal s21 of the second switch S2 is connected to the cathode m2 of the photoelectric device 301, the second terminal s22 of the second switch S2 is connected to the second transmission unit 204 and the bias source 207, and the anode n2 of the photoelectric device 301 is connected to ground.

[0097] Figure 9 A schematic diagram showing an exemplary structure of the first transmission unit 202 according to an embodiment of this application.

[0098] like Figure 9 As shown, in one possible implementation, the first transmission unit 202 includes an inverter F and a field-effect transistor (MOS).

[0099] The input terminal f1 of the inverter F receives the first digital signal D1, the output terminal f2 of the inverter F is connected to the first terminal k1 of the field-effect transistor MOS, the second terminal k2 of the field-effect transistor MOS is connected to ground, and the third terminal k3 of the field-effect transistor MOS is connected to the switching module 60.

[0100] In this way, when the switching module controls the first transmission unit to connect to the light-emitting device, the intensity of the third light signal emitted by the light-emitting device can change accordingly with the value of the first digital signal, thereby realizing the output of digital signals in the form of light signals.

[0101] The following is combined Figure 8 and Figure 9 The principle of how the first transmission unit 202 drives the light-emitting device 304 is introduced.

[0102] For example, the value of the first digital signal D1 may be "1" or "0". It can be configured that the first transmission unit 202 drives the light-emitting device 304 to emit light when it receives the first digital signal D1 with a value of "0", and does not drive the light-emitting device 304 to emit light when it receives the first digital signal D1 with a value of "1". This mechanism can be implemented by setting an inverter and a field-effect transistor (MOS).

[0103] For example, it can make the inverter F and the field-effect transistor MOS... Figure 9The connection method is configured such that the inverter F and the field-effect transistor (MOSFET) can both be implemented based on existing technologies. The MOSFET can be an N-channel MOSFET, with its first terminal k1 being the gate, the second terminal k2 being the source, and the third terminal k3 being the drain. In this case, when the first digital signal D1, which has a value of "0", is input to the first transmission unit 202, it can first be input to the inverter F, and the inverter F outputs a digital signal with a value of "1" to the MOSFET; this digital signal with a value of "1" can turn on the MOSFET. Assuming that in the switching module 60, the first terminal s11 of the first switch S1 is connected to the second terminal s12 of the first switch S1, i.e., the cathode m1 of the light-emitting device 304 is connected to the first transmission unit 202, then a path can be formed between the current source 208, the light-emitting device 304, and ground. Current will flow through the light-emitting device 304, causing it to emit light, i.e., emitting a third light signal E3. The intensity (illuminance, also known as illuminance) of the third light signal E3 can be, for example, greater than 1000 lx. Correspondingly, when the first digital signal D1 with a value of "1" is input to the first transmission unit 202, the field-effect transistor MOS is turned off, no current flows through the light-emitting device 304, and the light-emitting device 304 does not emit light, which can also be considered as emitting a third light signal E3 with an intensity of 0. At this time, the correspondence between the intensity of the light signal emitted by the light-emitting device and the digital signal to be transmitted can be that a light signal with an intensity of 1000 lx or higher corresponds to a first digital signal with a value of "0", and a light signal with an intensity of 0 corresponds to a first digital signal with a value of "1".

[0104] Those skilled in the art should understand that the correspondence between the intensity of the light signal emitted by the light-emitting device and the digital signal to be transmitted can also be other correspondences. For example, a light signal with an intensity of 1000 lx or higher corresponds to a first digital signal with a value of "1", and a light signal with an intensity of 0 corresponds to a first digital signal with a value of "0". The specific structure of the first transmission unit is only an example, and it can be implemented using other structures, and is not limited to those described above. Figure 9 For example, as long as the intensity of the light signal emitted by the light-emitting device corresponds to the digital signal to be transmitted, this application does not limit the specific structure of the first transmission unit.

[0105] Figure 10 A schematic diagram showing an exemplary structure of the second transmission unit 204 according to an embodiment of this application.

[0106] like Figure 10 As shown, in one possible implementation, the second transmission unit 204 includes an amplifier A1, a low-pass filter L1, and a Schmitt trigger C1.

[0107] The first input terminal a1 of the amplifier A1 is connected to the switching module 60 through the DC blocking capacitor c0 and grounded through the first resistor R1. The second input terminal a2 of the amplifier A1 is grounded through the second resistor R2 and connected to the output terminal a3 of the amplifier A1 and the input terminal l1 of the low-pass filter L1 through the third resistor R3.

[0108] The output terminal l2 of the low-pass filter L1 is connected to the input terminal c1 of the Schmitt trigger C1;

[0109] The output terminal c2 of the Schmitt trigger C1 outputs the second digital signal D2.

[0110] In this way, when the switching module controls the second transmission unit to connect to the optoelectronic device, the value of the signal from the optoelectronic device can correspond to the intensity of the light signal received by the optoelectronic device. Therefore, the value of the second digital signal obtained from the signal from the optoelectronic device also corresponds to the intensity of the light signal received by the optoelectronic device, thereby realizing the reception of digital signals in the form of optical signals.

[0111] The following is combined Figure 8 and Figure 10 The principle of how the second transmission unit 204 obtains the second digital signal is introduced.

[0112] For example, the signal I2 from the optoelectronic device 304 can be obtained by the optoelectronic device 304 of the first electronic device based on the optical signal emitted by the second electronic device. Since the intensity of the optical signal E4 emitted by the second electronic device corresponds to the value of the digital signal it wants to transmit, when the second transmission unit 204 of the first electronic device obtains the second digital signal D2, it should obtain a digital signal with the same value as the digital signal that the second electronic device wants to transmit. This mechanism can be implemented by setting amplifier A1, low-pass filter L1, Schmitt trigger C1, and auxiliary devices such as capacitors and resistors in the second transmission unit 204 of the first electronic device.

[0113] For example, assuming that in the switching module 60 of the first electronic device, the first terminal s21 of the second switch S2 is connected to the second terminal s22 of the second switch S2, that is, the cathode m2 of the photoelectric device 301 is connected to the second transmission unit 204 and the bias source 207, then a path can be formed between the bias source 207 of the first electronic device and the photoelectric device 301. When the second electronic device emits an optical signal, the photoelectric device 301 of the first electronic device can receive the optical signal and generate a weak electrical signal based on the optical signal. This electrical signal is input to the amplifier A1 through the DC blocking capacitor c0. The amplified signal is obtained at the output terminal a3 of the amplifier A1, filtered by the low-pass filter L1, and rectified by the Schmitt trigger C1 to obtain a digital signal with a value of "1" or "0", that is, the second digital signal D2. At this time, the value of the second digital signal D2 corresponds to the intensity of the optical signal emitted by the second electronic device, and therefore is the same as the value of the digital signal to be transmitted by the second electronic device.

[0114] As described above, the second electronic device can drive the light-emitting device to emit light (e.g., light signal E3) when a digital signal with a value of "0" is to be output, and not drive the light-emitting device to emit light when a digital signal with a value of "1" is to be output. Considering the influence of ambient light and the loss of light during propagation, the intensity of the light signal E4 received by the optoelectronic device 304 of the current electronic device may deviate slightly from the intensity of the light signal E3. It can be considered that when the intensity of the light signal E4 is greater than a first threshold (e.g., 1000 lx), it indicates that the other electronic device wants to output a digital signal with a value of "0", and when it is less than a second threshold (e.g., 200 lx), it indicates that the other electronic device wants to output a digital signal with a value of "1". The first threshold and the second threshold can also take other values, as long as the first threshold is greater than the second threshold, this application does not impose any restrictions on this. The parameters of amplifier A1, low-pass filter L1, and Schmitt trigger C1 can be preset according to the values ​​of the first threshold and the second threshold, this application does not impose any restrictions on the specific values ​​of the parameters of amplifier A1, low-pass filter L1, and Schmitt trigger C1.

[0115] Amplifier A1, low-pass filter L1, and Schmitt trigger C1 can all be implemented based on existing technologies. Those skilled in the art should understand that the specific structure of the second transmission unit is merely an example, and it can also be implemented using other structures, and is not limited to those described above. Figure 10 For example, as long as a digital signal corresponding to the signal from the optoelectronic device can be obtained, and the obtained digital signal is the same as the digital signal to be transmitted by the second electronic device, this application does not limit the specific structure of the second transmission unit.

[0116] The exemplary structure and function of the analog signal acquisition module 20 according to embodiments of this application are described below. Figure 11A schematic diagram showing an exemplary structure of an analog signal acquisition module 20 according to an embodiment of this application is provided.

[0117] like Figure 11 As shown, in one possible implementation, the analog signal acquisition module 20 includes a first acquisition unit 203 and a second acquisition unit 205.

[0118] When the switching module 60 controls the first acquisition unit 203 to connect to the light-emitting device 304, and the first acquisition unit 203 receives an analog signal acquisition command, the first acquisition unit 203 is used to drive the light-emitting device 304 to emit the first light signal E1.

[0119] When the switching module 60 controls the second acquisition unit 205 to connect to the optoelectronic device 301, and the second acquisition unit 205 receives a signal from the optoelectronic device 301, the second acquisition unit 205 is used to obtain the analog signal V1 based on the signal from the optoelectronic device 301.

[0120] The switching module controls the connection between the first acquisition unit and the light-emitting device, and the second acquisition unit and the photoelectric device, enabling the analog signal acquisition module to acquire analog signals by combining the light-emitting device and the photoelectric device. Furthermore, the switching module can also control the connection between the first transmission unit and the light-emitting device, and the second transmission unit and the photoelectric device, allowing the digital signal transmission module to transmit digital signals by combining the same light-emitting device and photoelectric device. Therefore, the light-emitting device and the photoelectric device can be multiplexed in the signal acquisition and transmission circuit. This allows the signal acquisition and transmission circuit to still perform analog signal acquisition and digital signal transmission even with only one set of light-emitting devices and photoelectric devices, reducing the hardware cost of the circuit.

[0121] For example, the analog signal acquisition module 20 may include two units: a first acquisition unit 203 and a second acquisition unit 205. The first acquisition unit 203 is responsible for receiving analog signal acquisition commands and driving the light-emitting device 304 to emit light according to the commands. The second acquisition unit 205 is responsible for processing the signal from the photoelectric device 301 to obtain the analog signal V1. The switching module 60 can be used to control the connection of the first acquisition unit 203 to the light-emitting device 304, thereby connecting the analog signal acquisition module 20 to the light-emitting device 304, so that the first acquisition unit 203 in the analog signal acquisition module 20 can execute the analog signal acquisition command. The switching module 60 can also be used to control the connection of the second acquisition unit 205 to the photoelectric device 301, thereby connecting the digital signal transmission module 40 to the photoelectric device 301, so that the second acquisition unit 205 in the digital signal transmission module 40 can receive the signal from the photoelectric device 301.

[0122] The following section first presents an exemplary structure of the switching module 60, and then, in conjunction with the exemplary structure of the switching module 60, introduces the principle by which the first acquisition unit 203 drives the light-emitting device 304 and the second acquisition unit 205 obtains the analog signal V1.

[0123] Figure 12 A schematic diagram showing an exemplary structure of the switching module 60 according to an embodiment of this application.

[0124] like Figure 12 As shown, in one possible implementation, the switching module 60 includes a switching control unit 206, a first switch S1, and a second switch S2.

[0125] The control terminal s10 of the first switch S1 is connected to the first terminal p1 of the switching control unit 206, the first terminal s11 of the first switch S1 is connected to the cathode m1 of the light-emitting device 304, the third terminal s13 of the first switch S1 is connected to the first acquisition unit 203, and the anode n1 of the light-emitting device 304 is connected to the current source 208.

[0126] The control terminal s20 of the second switch S2 is connected to the second terminal p2 of the switching control unit 206, the first terminal s21 of the second switch S2 is connected to the cathode m2 of the photoelectric device 301, the third terminal s23 of the second switch S2 is connected to the second acquisition unit 205, and the anode n2 of the photoelectric device 301 is connected to ground.

[0127] For example, the first switch S1, in addition to being connected to the first transmission unit 202, can also be connected to the first acquisition unit 203; the second switch S2, in addition to being connected to the second transmission unit 204, can also be connected to the second acquisition unit 205. In this case, the switching control unit 206 can enable the first acquisition unit 203 to operate by controlling the connection of the first terminal s11 and the third terminal s13 of the first switch S1; and enable the second acquisition unit 205 to operate by controlling the connection of the first terminal s21 and the third terminal s23 of the second switch S1; thus ensuring that the analog signal acquisition unit 20 can operate normally.

[0128] Those skilled in the art should understand that the structure of the switching module 60 is not limited to the above example. For example, it may include more switches, such that each switch is used to control whether a collection unit or a transmission unit is connected to a light-emitting device or a photoelectric device, etc. This application does not limit the specific structure of the switching module 60.

[0129] The first acquisition unit 203 and the second acquisition unit 205 can be implemented based on existing technology, as long as the first acquisition unit can drive the light-emitting device to emit light and the second acquisition unit can obtain an analog signal from the signal from the optoelectronic device. This application does not limit the specific structure of the first acquisition unit 203 and the second acquisition unit 205.

[0130] In one possible implementation, the signal acquisition and transmission circuit 80 is also connected to a control circuit. The switching module 60 is used to receive a control signal from the control circuit and control the first acquisition unit 203 and the second acquisition unit 205 to connect to the light-emitting device 304 and the photoelectric device 301 according to the control signal, or control the first transmission unit 202 to connect to the light-emitting device 304 and / or the second transmission unit 204 to connect to the photoelectric device 304.

[0131] In this way, a signal acquisition and transmission circuit consisting of only one set of light-emitting devices and optoelectronic devices can switch between analog signal acquisition and digital signal transmission functions, enabling the signal acquisition and transmission circuit to perform more functions at a lower hardware cost.

[0132] For example, the signal acquisition and transmission circuit 80 is used for analog signal acquisition or digital signal transmission, and can be controlled by a control circuit (see example). Figure 13 The control signal output by the control circuit 90 in the switching module 60 is used for control. This control signal can be output to the switching control unit 206 in the switching module 60. The control signal can include different types, and the switching control unit 206 can control the conduction mode of the first switch S1 and the second switch S2 in the signal acquisition and transmission circuit 80 according to the type of control signal (for example, by outputting signals to the control terminals of the first switch S1 and the second switch S2). The specific implementation method can be found below. Figure 13 Related descriptions.

[0133] Figure 13 A schematic diagram illustrating an exemplary structure of an electronic device according to an embodiment of this application is shown.

[0134] like Figure 13 As shown, this application proposes an electronic device 70, including the signal acquisition and transmission circuit 80 described above and a control circuit 90, wherein the control circuit 90 is used for:

[0135] Upon receiving an analog signal acquisition command, a control signal is output to the signal acquisition and transmission circuit 80 according to the analog signal acquisition command. The control signal is used to control the analog signal acquisition module 20 to connect to one or more light-emitting devices 304 and one or more optoelectronic devices 301.

[0136] Upon receiving a digital signal transmission instruction, a control signal is output to the signal acquisition and transmission circuit 80 according to the digital signal transmission instruction. The control signal is used to control the digital signal transmission module 40 to connect to one or more light-emitting devices 304 and / or one or more optoelectronic devices 301.

[0137] Upon receiving analog signal acquisition instructions and digital signal transmission instructions, the circuit outputs control signals to the signal acquisition and transmission circuit 80 according to the analog signal acquisition instructions and digital signal transmission instructions. The control signals are used to control the analog signal acquisition module 20 to connect to one or more light-emitting devices 304 and one or more optoelectronic devices 301, and to control the digital signal transmission module 40 to connect to one or more light-emitting devices 304 and / or one or more optoelectronic devices 301. The same light-emitting device 304 or the same optoelectronic device 301 is not connected to the analog signal acquisition module 20 and the digital signal transmission module 40 at the same time.

[0138] For example, when the control circuit 90 receives an analog signal acquisition command, it can determine that the electronic device 70 needs to acquire analog signals, and then output a first control signal to the signal acquisition and transmission circuit 80. When the switching control unit 206 of the signal acquisition and transmission circuit 80 receives the first control signal, it can control the first terminal of the first switch in at least one switching module to connect to the third terminal, and control the first terminal of the second switch in at least one switching module to connect to the third terminal, so that the analog signal acquisition module 20 is connected to one or more light-emitting devices 304 and one or more photoelectric devices 301. At this time, the signal acquisition and transmission circuit 80 can be used for analog signal acquisition.

[0139] For example, when the control circuit 90 receives a digital signal transmission command, it can determine that the electronic device 70 needs to output a digital signal, and can then output a second control signal to the signal acquisition and transmission circuit 80. When the switching control unit 206 of the signal acquisition and transmission circuit 80 receives the second control signal, it can control the first terminal of the first switch in at least one switching module to connect to the second terminal, so that the digital signal transmission module 40 is connected to one or more light-emitting devices 304. At this time, the signal acquisition and transmission circuit 80 can be used for the output of digital signals (in the form of optical signals).

[0140] For example, when the control circuit 90 receives a digital signal transmission command, it can determine that the electronic device 70 needs to receive digital signals, and can then output a third control signal to the signal acquisition and transmission circuit 80. When the switching control unit 206 of the signal acquisition and transmission circuit 80 receives the third control signal, it can control the first terminal of the second switch in at least one switching module to connect to the second terminal, so that the digital signal transmission module 40 is connected to one or more optoelectronic devices 301. At this time, the signal acquisition and transmission circuit 80 can be used for the reception and conversion of digital signals (in the form of optical signals).

[0141] For example, when control circuit 90 receives a digital signal transmission command, it can determine that electronic device 70 needs to receive and output digital signals simultaneously, and can then output a fourth control signal to signal acquisition and transmission circuit 80. When the switching control unit 206 of signal acquisition and transmission circuit 80 receives the fourth control signal, it can control the first terminal of the first switch in at least one switching module to connect to the second terminal, so that digital signal transmission module 40 is connected to one or more light-emitting devices 304. It also controls the first terminal of the second switch in at least one switching module to connect to the second terminal, so that digital signal transmission module 40 is connected to one or more optoelectronic devices 301. At this time, signal acquisition and transmission circuit 80 can be used for the output of digital signals (in the form of optical signals) and the reception and conversion of digital signals (in the form of optical signals).

[0142] For example, when control circuit 90 receives analog signal acquisition instructions and digital signal transmission instructions, it can determine that electronic device 70 needs to acquire analog signals and output digital signals simultaneously, and can then output a fifth control signal to signal acquisition and transmission circuit 80. When switching control unit 206 of signal acquisition and transmission circuit 80 receives the fifth control signal, it can control the first end of the first switch in at least one switching module to connect to the third end, and control the first end of the second switch in at least one switching module to connect to the third end, so that analog signal acquisition module 20 connects to one or more light-emitting devices 304 and one or more photoelectric devices 301. At this time, signal acquisition and transmission circuit 80 can be used for analog signal acquisition. When switching control unit 206 receives the fifth control signal, it can also control the first end of the first switch in at least one switching module to connect to the second end, so that digital signal transmission module 40 connects to one or more light-emitting devices 304. The first switch with the first end connected to the second end and the first switch with the first end connected to the third end should belong to different switching modules, that is, the same light-emitting device 304 is not simultaneously connected to analog signal acquisition module 20 and digital signal transmission module 40. At this time, signal acquisition and transmission circuit 80 can be used for digital signal output (in the form of optical signals). It should be noted that, in order to achieve the simultaneous acquisition of analog signals and output of digital signals, the signal acquisition and transmission circuit 80 should include at least two sets of light-emitting devices and photoelectric devices, so that at least two light-emitting devices can be used to emit light signals during analog signal acquisition and to emit light signals during digital signal transmission, respectively.

[0143] For example, when control circuit 90 receives analog signal acquisition instructions and digital signal transmission instructions, it can determine that electronic device 70 needs to acquire analog signals and receive digital signals simultaneously, and can then output a sixth control signal to signal acquisition and transmission circuit 80. When switching control unit 206 of signal acquisition and transmission circuit 80 receives the sixth control signal, it can control the first end of the first switch in at least one switching module to connect to the third end, and control the first end of the second switch in at least one switching module to connect to the third end, so that analog signal acquisition module 20 connects to one or more light-emitting devices 304 and one or more optoelectronic devices 301. At this time, signal acquisition and transmission circuit 80 can be used for analog signal acquisition. When switching control unit 206 receives the sixth control signal, it can also control the first end of the second switch in at least one switching module to connect to the second end, so that digital signal transmission module 40 connects to one or more optoelectronic devices 301. The second switch with the first end connected to the second end and the second switch with the first end connected to the third end should belong to different switching modules, that is, the same optoelectronic device 301 is not simultaneously connected to analog signal acquisition module 20 and digital signal transmission module 40. At this time, signal acquisition and transmission circuit 80 can be used for receiving and converting digital signals (in the form of optical signals). It should be noted that, in order to achieve the simultaneous acquisition of analog signals and reception of digital signals, the signal acquisition and transmission circuit 80 should include at least two sets of light-emitting devices and photoelectric devices, so that at least two photoelectric devices can be used to receive optical signals during analog signal acquisition and to receive optical signals during digital signal transmission, respectively.

[0144] For example, when control circuit 90 receives analog signal acquisition instructions and digital signal transmission instructions, it can determine that electronic device 70 needs to acquire analog signals, receive digital signals, and output digital signals simultaneously. Therefore, it can output a seventh control signal to signal acquisition and transmission circuit 80. When switching control unit 206 of signal acquisition and transmission circuit 80 receives the seventh control signal, it can control the first terminal of the first switch in at least one switching module to connect to the third terminal, and control the first terminal of the second switch in at least one switching module to connect to the third terminal, so that analog signal acquisition module 20 connects to one or more light-emitting devices 304 and one or more photoelectric devices 301. At this time, signal acquisition and transmission circuit 80 can be used for analog signal acquisition. When the switching control unit 206 receives the sixth control signal, it can also control the first end of the first switch in at least one switching module to connect to the second end, so that the digital signal transmission module 40 connects to one or more light-emitting devices 304, and control the first end of the second switch in at least one switching module to connect to the second end, so that the digital signal transmission module 40 connects to one or more optoelectronic devices 301. The second / first switch whose first end is connected to the second end and the second / first switch whose first end is connected to the third end should belong to different switching modules; that is, the same light-emitting device 304 or the same optoelectronic device 301 is not simultaneously connected to the analog signal acquisition module 20 and the digital signal transmission module 40. At this time, the signal acquisition and transmission circuit 80 can be used for the output of digital signals (in the form of optical signals) and the reception and conversion of digital signals (in the form of optical signals). It should be noted that, in order to achieve the simultaneous acquisition of analog signals and the simultaneous reception and output of digital signals, the signal acquisition and transmission circuit 80 should include at least two sets of light-emitting devices and photoelectric devices, such that at least two light-emitting devices can be used to emit light signals during analog signal acquisition and during digital signal transmission, respectively, and at least two photoelectric devices can be used to receive light signals during analog signal acquisition and during digital signal transmission, respectively.

[0145] The electronic device described in this application embodiment can be applied to... Figure 4a or Figure 4b In application scenarios, this electronic device may be, for example, Figure 4a Electronic devices in application scenarios, or Figure 4b The first or second electronic device in the application scenario. This electronic device is used in... Figure 4a In applications where the electronic device is worn by a user, it can collect analog signals. This electronic device is used in… Figure 4bIn applications where the electronic device is spatially close to another electronic device, and the other electronic device also includes signal acquisition and transmission circuitry, if the light-emitting device of the first electronic device emits a light signal that illuminates the photoelectric device of the other electronic device, the first electronic device can act as a digital signal transmitter. If the photoelectric device of the first electronic device is illuminated by a light signal emitted by the light-emitting device of the other electronic device, the first electronic device can act as a digital signal receiver. If the light-emitting devices of both the first and second electronic devices emit light signals simultaneously and illuminate the photoelectric devices of the other and first electronic devices respectively, both the first and second electronic devices can act as either digital signal transmitters or receivers.

[0146] If the electronic device is located close to another electronic device, and the other electronic device also includes signal acquisition and transmission circuitry, and if the electronic device is also worn by a user, then the electronic device can also acquire analog signals.

[0147] Figure 14 A schematic diagram of an exemplary structure of a signal transmission system according to an embodiment of this application is shown.

[0148] like Figure 14 As shown, this application proposes a signal transmission system, including a first electronic device and a second electronic device, wherein the first electronic device and the second electronic device are respectively the electronic device 70 described above.

[0149] When the digital signal transmission module 40 of the first electronic device drives the light-emitting device 304 in the first electronic device to emit a third light signal E3 according to the received first digital signal, the light signal received by the photoelectric device 301 of the second electronic device is the third light signal E3, and the second digital signal D2 obtained by the digital signal transmission module 40 of the second electronic device according to the signal I2 from the photoelectric device 304 in the second electronic device is the same as the first digital signal D1.

[0150] For example, the application scenarios of this signal transmission system could be as follows: Figure 4b In the application scenario, the first electronic device and the second electronic device included in this signal transmission system can be respectively... Figure 4bIn application scenarios involving a first and a second electronic device, when the second and first electronic devices are spatially close, if the light-emitting device of the second electronic device emits a light signal that illuminates the photoelectric device of the first electronic device, the second electronic device can act as a digital signal transmitter, and the first electronic device can act as a digital signal receiver. Similarly, if the light-emitting device of the first electronic device emits a light signal that illuminates the photoelectric device of the second electronic device, the first electronic device can act as a digital signal transmitter, and the second electronic device can act as a digital signal receiver. Furthermore, if both the light-emitting devices of the second and first electronic devices emit light signals simultaneously and illuminate the photoelectric devices of the first and second electronic devices respectively, both the second and first electronic devices can act as both digital signal transmitters and receivers.

[0151] When the second electronic device is spatially close to the first electronic device, if the first electronic device and / or the second electronic device are still being worn by the user, the first electronic device and / or the second electronic device can also collect analog signals.

[0152] Figure 15 An application example of a signal transmission system according to an embodiment of this application is shown.

[0153] like Figure 15 As shown, the first electronic device 508 can be the watch band of a smartwatch, and the second electronic device 503 can be the watch face of a smartwatch. The signal acquisition and transmission circuit of the first electronic device 508 can include two sets of light-emitting devices and photoelectric devices, wherein the first set of light-emitting devices 304 and photoelectric devices 301 is used for analog signal acquisition, and the second set of light-emitting devices 314 and photoelectric devices 311 is used for digital signal transmission. Since the light-emitting devices and photoelectric devices are not multiplexed, the first electronic device 508 can simultaneously acquire analog signals and transmit digital signals. The second electronic device 503 can include a set of light-emitting devices 324 and photoelectric devices 321 for digital signal transmission.

[0154] In this signal transmission system, the first electronic device 508 uses a first set of light-emitting devices 304 and photoelectric devices 301 to collect user biological information. For example, the analog signal acquisition module (not shown) of the signal acquisition and transmission circuit drives the light-emitting devices to emit light signals to the user's body surface 507, causing red blood cells 506 in the blood vessels under the body surface to reflect the light signals. The reflected light signals are received by the photoelectric devices 301 and obtained as analog signals by the analog signal acquisition module (not shown) of the signal acquisition and transmission circuit. At the same time, the first electronic device 508 uses a second set of light-emitting devices 314 and photoelectric devices 311 to complete the transmission of digital signals. The digital signals to be transmitted can indicate the biological information contained in the collected analog signals, so that the collected analog signals (in the form of digital signals) are synchronously transmitted to the second electronic device 503. The second electronic device 503 can use photoelectric devices 321 to receive the digital signals transmitted by the first electronic device 508 and store and analyze them.

[0155] Compared to existing technologies that rely on additional WiFi or Bluetooth chips to transmit data, the signal transmission system of this application does not require additional chips. It can transmit data using light-emitting devices and optoelectronic devices, thus avoiding additional costs.

[0156] Although the invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, disclosure, and appended claims in carrying out the claimed invention. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0157] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A signal acquisition and transmission circuit, characterized in that, The circuit includes: an analog signal acquisition module, a digital signal transmission module, and at least one set of light-emitting devices and optoelectronic devices. The circuit is applied to wearable electronic devices. For each group of light-emitting devices and optoelectronic devices: The analog signal acquisition module is used to drive the light-emitting device to emit a first light signal and obtain an analog signal based on the signal from the photoelectric device, wherein the signal from the photoelectric device is generated by the photoelectric device based on a received second light signal, and the second light signal is obtained by reflecting the first light signal; The digital signal transmission module is used to drive the light-emitting device to emit a third light signal according to the received first digital signal, and / or to obtain a second digital signal according to the signal from the photoelectric device, wherein the intensity of the third light signal corresponds to the value of the first digital signal, and the value of the second digital signal corresponds to the intensity of the light signal received by the photoelectric device. When the circuit includes two or more light-emitting devices, at least two light-emitting devices are used to emit light signals during analog signal acquisition and to emit light signals during digital signal transmission, respectively, and at least two photoelectric devices can be used to receive light signals during analog signal acquisition and to receive light signals during digital signal transmission, respectively. The circuit further includes at least one switching module, each switching module being connected to the analog signal acquisition module, the digital signal transmission module, and a set of light-emitting devices and optoelectronic devices. For each switching module and its connected set of light-emitting devices and optoelectronic devices: The switching module is used to control the analog signal acquisition module to connect to the light-emitting device and the optoelectronic device, and to control the digital signal transmission module to connect to the light-emitting device and / or the optoelectronic device, wherein the same light-emitting device or the same optoelectronic device is not connected to the analog signal acquisition module and the digital signal transmission module at the same time; When the digital signal transmission module is connected to the light-emitting device, the digital signal transmission module drives the light-emitting device to emit the third light signal according to the received first digital signal; When the digital signal transmission module is connected to the optoelectronic device, the digital signal transmission module obtains the second digital signal based on the signal from the optoelectronic device. When the digital signal transmission module connects the light-emitting device and the optoelectronic device, the digital signal transmission module drives the light-emitting device to emit a third light signal according to the received first digital signal, and obtains a second digital signal according to the signal from the optoelectronic device.

2. The circuit according to claim 1, characterized in that, The digital signal transmission module includes a first transmission unit and a second transmission unit. When the switching module controls the first transmission unit to connect to the light-emitting device, and the first transmission unit receives the first digital signal, the first transmission unit is used to drive the light-emitting device to emit the third light signal according to the first digital signal; When the switching module controls the second transmission unit to connect to the optoelectronic device, and the second transmission unit receives a signal from the optoelectronic device, the second transmission unit is used to obtain the second digital signal based on the signal from the optoelectronic device.

3. The circuit according to claim 2, characterized in that, The switching module includes a switching control unit, a first switch, and a second switch. The control terminal of the first switch is connected to the first terminal of the switching control unit, the first terminal of the first switch is connected to the cathode of the light-emitting device, the second terminal of the first switch is connected to the first transmission unit, and the anode of the light-emitting device is connected to the current source. The control terminal of the second switch is connected to the second terminal of the switching control unit, the first terminal of the second switch is connected to the cathode of the photoelectric device, the second terminal of the second switch is connected to the second transmission unit and the bias source, and the anode of the photoelectric device is connected to ground.

4. The circuit according to claim 2 or 3, characterized in that, The analog signal acquisition module includes a first acquisition unit and a second acquisition unit. When the switching module controls the first acquisition unit to connect to the light-emitting device, and the first acquisition unit receives an analog signal acquisition command, the first acquisition unit is used to drive the light-emitting device to emit the first light signal; When the switching module controls the second acquisition unit to connect to the optoelectronic device, and the second acquisition unit receives a signal from the optoelectronic device, the second acquisition unit is used to obtain the analog signal based on the signal from the optoelectronic device.

5. The circuit according to claim 4, characterized in that, The switching module includes a switching control unit, a first switch, and a second switch. The control terminal of the first switch is connected to the first terminal of the switching control unit, the first terminal of the first switch is connected to the cathode of the light-emitting device, the third terminal of the first switch is connected to the first acquisition unit, and the anode of the light-emitting device is connected to a current source. The control terminal of the second switch is connected to the second terminal of the switching control unit, the first terminal of the second switch is connected to the cathode of the photoelectric device, the third terminal of the second switch is connected to the second acquisition unit, and the anode of the photoelectric device is connected to ground.

6. The circuit according to claim 4, characterized in that, The signal acquisition and transmission circuit is also connected to the control circuit. The switching module is used to receive control signals from the control circuit and control the first acquisition unit and the second acquisition unit to connect to the light-emitting device and the optoelectronic device according to the control signals, or control the first transmission unit to connect to the light-emitting device and / or the second transmission unit to connect to the optoelectronic device.

7. An electronic device, characterized in that, The circuit includes the signal acquisition and transmission circuit and the control circuit as described in any one of claims 1-6, wherein the control circuit is used for: Upon receiving an analog signal acquisition command, a control signal is output to the signal acquisition and transmission circuit according to the analog signal acquisition command. The control signal is used to control the analog signal acquisition module to connect to one or more light-emitting devices and one or more optoelectronic devices. Upon receiving a digital signal transmission instruction, a control signal is output to the signal acquisition and transmission circuit according to the digital signal transmission instruction. The control signal is used to control the digital signal transmission module to connect to one or more light-emitting devices and / or one or more optoelectronic devices. Upon receiving analog signal acquisition instructions and digital signal transmission instructions, the circuit outputs control signals to the signal acquisition and transmission circuit according to the analog signal acquisition instructions and digital signal transmission instructions. The control signals are used to control the analog signal acquisition module to connect to one or more light-emitting devices and one or more optoelectronic devices, and to control the digital signal transmission module to connect to one or more light-emitting devices and / or one or more optoelectronic devices. The same light-emitting device or the same optoelectronic device may not be connected to the analog signal acquisition module and the digital signal transmission module at the same time.

8. A signal transmission system, characterized in that, It includes a first electronic device and a second electronic device, wherein the first electronic device and the second electronic device are respectively the electronic devices described in claim 7. When the digital signal transmission module of the first electronic device drives the light-emitting device in the first electronic device to emit a third light signal according to the received first digital signal, the light signal received by the photoelectric device of the second electronic device is the third light signal, and the second digital signal obtained by the digital signal transmission module of the second electronic device according to the signal from the photoelectric device in the second electronic device is the same as the first digital signal.

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