Electronic ink screen display system and equipment

Abstract

The utility model relates to the technical field of electronic display, in particular to an electronic ink screen display system and equipment, the electronic ink screen display system comprises a display module and a main control module, and a wireless communication module is arranged in the main control module; the audio module comprises a digital-to-analog conversion circuit used for converting digital signals into audio data and an analog-to-digital conversion circuit used for converting the audio data into the digital signals, the digital-to-analog conversion circuit and the analog-to-digital conversion circuit are respectively connected with the main control module, and the display module adopts a reflective, bistable and low-power-consumption electronic ink screen and can display in power failure. The wireless communication module can remotely update display content through a network, the integrated audio module realizes voice picture switching, music playing and AI dialogue, the electronic ink screen display system is integrated into an ultra-low power consumption wireless terminal capable of listening, recording and displaying, and the temperature and humidity sensing module collects temperature and humidity data in the environment in real time. The display module visually displays the temperature and humidity information.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic display technical field, especially electronic ink screen display system and equipment. BACKGROUND

[0002] With the development of the Internet of Things and intelligent terminal technology, electronic ink screens have gradually expanded from traditional application scenarios such as shelf price tags and logistics face sheets to emerging scenarios such as environmental monitoring terminals and portable information boards, thanks to their core advantages of low power consumption, wide viewing angle, and power-off display retention.

[0003] Most electronic ink screen products on the market currently only focus on single display functions and lack integrated auxiliary function expansion. For example, there is a lack of flexible interactive operation design, electronic ink screens cannot be added to smart home control, users often can only passively receive screen display information, cannot input voice commands, cannot interact with devices in real time through voice convenient methods to achieve fast control, cannot access large language models to realize voice dialogue functions, and thus the application of electronic ink screens in interactive scenarios is limited. UTILITY MODEL CONTENT

[0004] To solve the problem that existing electronic ink screens cannot realize interaction through voice commands, the utility model provides an electronic ink screen display system and equipment.

[0005] The utility model solves the technical problem by providing an electronic ink screen display system, which comprises a display module and a main control module for driving the display module. The main control module is built-in with a wireless communication module. The main control module adopts an ESP32-S3 chip built-in with the wireless communication module. The wireless communication module comprises a WiFi module and a Bluetooth module. The electronic ink screen display system further comprises an audio module electrically connected with the main control module. The audio module comprises a digital-to-analog conversion circuit for converting digital signals into audio data and an analog-to-digital conversion circuit for converting the audio data into the digital signals. The digital-to-analog conversion circuit and the analog-to-digital conversion circuit are respectively connected with the main control module. The electronic ink screen display system further comprises a temperature and humidity sensing module electrically connected with the main control module.

[0006] Preferably, the audio module further comprises a microphone circuit for collecting voice, an echo cancellation circuit for eliminating echo, and a playback circuit for playing the audio data. The microphone circuit is connected with the analog-to-digital conversion circuit. The echo cancellation circuit is connected with the analog-to-digital conversion circuit. The playback circuit is connected with the digital-to-analog conversion circuit.

[0007] Preferably, the analog-to-digital conversion circuit adopts an ES7210 chip.

[0008] Preferably, the electronic ink screen display system comprises an interface module, which is a Type-C USB interface module, and the Type-C USB interface module is connected with the master control module.

[0009] Preferably, the electronic ink screen display system further comprises a clock module, and the clock module is connected with the master control module.

[0010] Preferably, the electronic ink screen display system comprises a power management module connected with the master control module.

[0011] Preferably, the electronic ink screen display system further comprises a storage module connected with the master control module.

[0012] Preferably, the display module is connected with the master control module through an SPI communication protocol.

[0013] Preferably, the electronic ink screen display system comprises a key module connected with the master control module.

[0014] The utility model also provides an electronic ink screen display device, the electronic ink screen display device includes display device main part and electronic ink screen display system as preceding, the server is connected with the master control module.

[0015] Compared with the prior art, the electronic ink screen display system and device provided by the utility model have the following advantages:

[0016] 1. The electronic ink screen display system provided in the embodiment of the utility model, the main control module drives the display module to run, the display module is used for presenting text, pattern and the like information, the main control module is built-in wireless communication module, realizes wireless interaction with external equipment, obtains the updated display content from external equipment, still can pass through audio input and the input and output interaction of main control module, realizes voice switching picture, the function of playing music, external equipment can be the server including artificial intelligence big language model, realizes artificial intelligence dialogue; The audio module supports audio bidirectional processing: the digital signal obtained by the main control module is converted into audio data by the digital-analog conversion circuit, sound playing is realized; The external audio data is converted into digital signal by the analog-digital conversion circuit and transmitted to the main control module, voice collection is realized, the display module adopts electronic ink screen, makes display clear and low power consumption; The ESP32-S3 master chip has powerful processing capacity, efficiently processes display, audio collection, audio output and the like tasks, the ESP32-S3 master chip is built-in wireless communication module, the WiFi module in wireless communication module lets electronic ink screen display system access wireless network, realizes high-speed data transmission, downloads new display content, and shares access external equipment through the WiFi module, realizes the remote control of external equipment to electronic ink screen display system;Bluetooth module is convenient for display system and bluetooth device pairing connection, updates display content in close range;The temperature and humidity sensing module can collect temperature and humidity data in the environment in real time and transmit the collected digital signal to the main control module, after the main control module receives the data, the temperature and humidity information can be directly presented and displayed through the display module, the display module presents the temperature and humidity data in the form of clear text value, so that the user can intuitively obtain the temperature and humidity information of the current environment, and relying on the characteristics of low power consumption and power-off display of electronic ink screen, the temperature and humidity data can be displayed stably for a long time without continuous high-power operation.

[0017] 2. The electronic ink screen display system provided in the embodiment of the utility model, the microphone circuit collects the voice signal of the external user, provides audio input source, so that the user can control the display system through voice command operation;The analog audio data collected by the microphone is converted into digital signal by the analog-digital conversion circuit;The digital signal obtained by the main control module through the wireless communication module is converted into analog audio data by the digital-analog conversion circuit, providing input for the playing circuit;The analog audio data is output through the speaker and the like device by the playing circuit, realizing audio playing function;The echo cancellation circuit carries out echo cancellation to the data of the playing circuit, reduces echo interference, improves the clarity and accuracy of voice interaction, enhances user experience.

[0018] 3. The electronic ink screen display system provided by the embodiment of the utility model, the Type-C USB interface module realizes the physical connection of the electronic ink screen display system and external equipment, can supply power, data transmission, the Type-C interface is a positive and negative pluggable, convenient to use hardware interface form, the Type-C interface is connected with the main control module, realizes the data interaction of the electronic ink screen display system and computer, mobile phone and other equipment, facilitates the user manual operation to update the display content, transmits the audio file, or exports the data from the display system.

[0019] 4. The electronic ink screen display system provided by the embodiment of the utility model, the clock module adopts PCF8563ATL chip, provides accurate and stable time reference for the electronic ink screen display system, can record the interaction time, adds the time stamp to the data in the storage module, can also trigger the timing task, the main control module reads the time data of the clock module through the I2C communication protocol, ensures the orderly operation of the whole electronic ink screen display system.

[0020] 5. The electronic ink screen display system provided by the embodiment of the utility model, the power management module is the power supply received by the Type-C USB interface module, processes the transmitted external power, including voltage conversion, current limiting, power distribution and other functions, transports the power to the main control module, display module, audio module, wireless communication module and all other power components as needed, normally drives the display module to refresh the picture, the wireless communication module interacts with the external system, the audio module completes the audio processing; at the same time, the power management module will manage the charging and discharging of the built-in battery of the ink screen display system according to the USB access condition, prolong the service life of the battery by adjusting the charging and discharging current and cutoff voltage.

[0021] 6. The electronic ink screen display system provided by the embodiment of the utility model, the storage module includes an external memory card, expands the system storage capacity, saves the text image displayed by the display module and the audio file involved by the audio module, the display module can directly call the pre-stored screen display data from the storage module when refreshing the picture is needed, the audio module can store the processed audio data to the storage module for subsequent calling after collecting the voice, can also store local music, and can also play the stored audio content in offline state.

[0022] 7. The electronic ink screen display system provided by the embodiment of the utility model, the key module can receive the operation instruction of the user such as pressing off, switching display content, adjusting volume, triggering audio collection, and transmit the corresponding generated electric signal to the main control module, the main control module sends control instruction to the display module, audio module and other components according to the preset key function logic, the key module provides physical interaction mode for the user, enhances the operability and applicability of the electronic ink screen display system.

[0023] 8. The utility model discloses an electronic ink screen display device, has the same beneficial effect with the electronic ink screen display system of preceding described, here no longer repeat. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawing needed to be used in the embodiment or prior art description will be briefly introduced, obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying the creativity of labor.

[0025] Figure 1 It is the block diagram of the electronic ink screen display system provided by the first embodiment of the utility model.

[0026] Figure 2 It is the block diagram of the audio frequency module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0027] Figure 3 It is the block diagram of the main control module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0028] Figure 4 It is the circuit diagram of the main control module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0029] Figure 5 It is the circuit diagram of the digital-analog conversion circuit of the audio frequency module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0030] Figure 6 It is the circuit diagram of the analog-digital conversion circuit of the audio frequency module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0031] Figure 7 It is the circuit diagram of the microphone circuit of the audio frequency module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0032] Figure 8 It is the circuit diagram of the audio frequency processing circuit of the audio frequency module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0033] Figure 9 It is the circuit diagram of the echo cancellation circuit of the audio frequency module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0034] Figure 10 It is the block diagram of the display module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0035] Figure 11 is the circuit diagram of the interface module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0036] Figure 12 is the circuit of the display module of the electronic ink screen display system provided by the first embodiment of the utility model Figure 1 .

[0037] Figure 13 is the circuit of the display module of the electronic ink screen display system provided by the first embodiment of the utility model Figure 2 .

[0038] Figure 14 is the circuit diagram of the power management module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0039] Figure 15 is the circuit diagram of the clock module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0040] Figure 16 is the circuit diagram of the storage module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0041] Figure 17 is the circuit diagram of the key module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0042] Figure 18 is the circuit diagram of the temperature and humidity sensing module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0043] Figure 19 is the pin contrast table of the connection of each module and the main control module of the electronic ink screen display system provided by the first embodiment of the utility model.

[0044] Figure 20 is the block diagram of the electronic ink screen display device provided by the second embodiment of the utility model.

[0045] The drawing mark explanation is:

[0046] 100, electronic ink screen display system;200, electronic ink screen display device;300, display device main body;

[0047] 1, audio module;2, main control module;3, display module;4, interface module;5, clock module;6, power management module;7, storage module;8, temperature and humidity sensing module;9, key module;

[0048] 11, digital-to-analog conversion circuit; 12, analog-to-digital conversion circuit; 13, microphone circuit; 14, playback circuit; 15, echo cancellation circuit; 20, wireless communication module; 21, main control pull-up circuit; 31, first boost circuit; 32, second boost circuit; 33, transmission mode selection circuit; 34, wire socket interface circuit; 71, TF card interface circuit; 72, pull-up circuit; 91, key circuit; 92, LED indication circuit;

[0049] 111, audio output processing circuit; 121, I2C selection circuit; 141, power amplifier; 142, filter circuit; 201, WiFi module; 202, Bluetooth module. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0052] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0053] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0054] In addition, the terms "mounting", "arrangement", "provided with", "connected", "linked" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be directly linked, or indirectly linked through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0055] Referring to Figure 1 With Figure 2 , the utility model discloses an electronic ink screen display system 100, and the electronic ink screen display system 100 includes display module 3 and the main control module 2 of driving display module 3, and the main control module 2 is built in wireless communication module 20;The electronic ink screen display system 100 still includes the audio frequency module 1 of being electrically connected with main control module 2, and the audio frequency module 1 includes the digital-analog conversion circuit 11 for converting digital signal into audio data and the analog-digital conversion circuit 12 for converting audio data into digital signal, and the digital-analog conversion circuit 11 and the analog-digital conversion circuit 12 are connected with main control module 2 respectively.

[0056] Understandably, display module 3 is used to display text, numbers, patterns and the like, and the main control module 2 coordinates data transmission between modules, realizes data interaction with external equipment through the wireless communication module 20 built in the main control module 2, receives remotely sent text, pattern and the like display content and control instruction, controls display module 3 to show information, and at the same time carries out digital signal transmission with the audio frequency module 1, and sends instruction to external equipment through the audio frequency module 1.

[0057] Specifically, referring to Figures 4 to 6 , the digital-analog conversion circuit 11 receives the digital signal output by the main control module 2, converts it into audio data, so that digital information can be converted into audible audio, and the analog-digital conversion circuit 12 receives external audio data, converts it into digital signal and transmits it to the main control module 2, so as to facilitate the main control module 2 to analyze and identify the audio data.

[0058] Understandably, each module is connected with the main control module 2, realizes its own function through the communication in the main control module 2, and the main control module 2 sends corresponding command execution module after processing data.

[0059] Specifically, the audio-triggered image display control flow is exemplarily shown in the embodiment as follows: the user input voice audio data is converted into a digital signal by the analog-to-digital conversion circuit 12 of the audio module 1, transmitted to the main control module 2, and sent to an external device by the built-in wireless communication module 20 of the main control module 2 for analysis and processing. The corresponding display data returned by the external device is received by the wireless communication module 20, analyzed and processed by the main control module 2, and then transmitted to the display module 3, and finally the corresponding content is presented on the display module 3.

[0060] Preferably, the display data can include various display data such as calendar clock, dialogue answer, two-dimensional code, picture, etc., which are not specifically limited in the embodiment.

[0061] Further, the display module 3 uses an electronic ink screen with low power consumption as the display module 3. Compared with the traditional LCD or OLED display screen used in the market, the electronic ink screen as the display module 3 has the advantages of low power consumption and low maintenance cost. It can still display the picture on the screen for a long time after power off, effectively prolonging the display time of the display picture.

[0062] Specifically, the display module 3 is connected with the main control module 2 through the SPI communication protocol.

[0063] Exemplarily, in a non-limiting specific implementation, Figure 12 As shown in the specific circuit layout of the electronic ink screen as the display module 3, the main control module 2 controls the start and stop of communication with the display module 3 through the CS (chip select) pin of the SPI interface, the SCK (clock) pin provides a synchronous clock for the display module 3, and the DIN (data input) pin sends data to the display module 3. The specific circuit layout of the display module 3 is not limited in the embodiment.

[0064] Specifically, as shown in the specific circuit layout of the display module 3, Figure 10 , Figure 12 and Figure 13 the specific circuit layout of the display module 3 includes a first boost circuit 31, a second boost circuit 32, and a transmission mode selection circuit 33 of the display module 3, and a flat cable socket interface circuit 34.

[0065] The first boost circuit 31 includes a positive boost circuit and a negative boost circuit, which raises the input EPD_VCC voltage through electronic components such as inductor L1, MOS tube AO3400, capacitor C12, and diode MBR0530, to generate positive voltages such as VPH and VGH, and negative voltage VGL.

[0066] The second voltage boosting circuit 32 includes a negative voltage boosting circuit, and a reverse voltage is generated at both ends of a capacitor by means of electronic components such as a MOS tube AO3401, an inductor L3, a diode D5, and a capacitor C30, so as to generate a negative voltage VPC. It should be noted that the first voltage boosting circuit 31 and the second voltage boosting circuit 32 are in parallel operation mode and are connected to the flat cable socket interface circuit 34.

[0067] The transmission mode selection circuit 33 selects a corresponding data transmission mode by means of different level combinations (0 or 1) of BS1 and BS0 pins, so as to realize data transmission between the master control module 2 and the ink screen of the display module 3.

[0068] The flat cable socket interface circuit 34 transmits power supply, control signals, display data, and various signals, so as to provide interface support for communication and power supply between the display module 3 and the master control module 2, and the ink screen realizes picture display by being connected to the circuit through the flat cable socket interface circuit 34.

[0069] Specifically, the external device can include an artificial intelligence large language model, and the artificial intelligence large language model receives the digital signal (text information converted from audio data) sent by the master control module 2, and generates corresponding display content data in combination with user demand. For example, the user's voice instruction is to generate a pattern with flowers and a calendar, the artificial intelligence large language model converts the voice instruction into matching display content data with pattern information and calendar information, and then returns these data to the master control module 2, and the master control module 2 transmits the data to the display module 3, so as to realize intelligent conversion from voice to image display.

[0070] Further, please refer to Figure 2 and Figure 5 - Figure 9 The audio module 1 further includes a microphone circuit 13 for collecting voice, a playing circuit 14 for playing audio data, and an echo cancellation circuit 15 for eliminating echo, the microphone circuit 13 is electrically connected to the analog-to-digital conversion circuit 12, and the playing circuit 14 is connected to the digital-to-analog conversion circuit 11.

[0071] It can be understood that the digital-to-analog conversion circuit 11 is electrically connected to the master control module 2, and the analog-to-digital conversion circuit 12 is electrically connected to the master control module 2, as Figure 2The block diagram shows the connection relationship of the circuits of the audio module 1, wherein the microphone circuit 13 collects external voice audio data and transmits the voice audio data to the analog-to-digital conversion circuit 12; the analog-to-digital conversion circuit 12 converts the audio data transmitted by the microphone circuit 13 into a digital signal and transmits the digital signal to the master control module 2; the digital-to-analog conversion circuit 11 receives the digital signal of the master control module 2 and converts the digital signal into analog audio data and transmits the analog audio data to the playing circuit 14 to realize audio playing; the echo cancellation circuit 15 performs echo processing on the audio data output by the playing circuit 14 to reduce or eliminate echo interference, avoid mutual interference between the audio data collected by the microphone and the sound played at the same time, prevent audio data overlap and reverberation, and improve the clarity of audio collection and playing.

[0072] Specifically, in the embodiment, the voice instruction of the user uploaded to the artificial intelligence large language model can also realize the voice question and answer function, and the audio module 1 of the electronic ink screen display system 100 provided by the utility model includes a digital-to-analog conversion circuit 11 for converting a digital signal into audio data to realize the function of playing audio.

[0073] Further, referring to Figure 3 and Figure 4 In a non-limiting specific embodiment, the master control module 2 adopts an ESP32-S3 chip with a built-in wireless communication module 20, and the wireless communication module 20 includes a WiFi module 201 and a Bluetooth module 202.

[0074] Specifically, the ESP32-S3 chip is a master control chip integrated with wireless communication function, and the ESP32-S3 chip can coordinate the work of the display module 3, the audio module 1 and other peripherals, support coding and decoding control of audio data and display driving of the electronic ink screen, and the ESP32-S3 chip is built-in with the WiFi module 201 and the Bluetooth module 202, the WiFi module 201 realizes the connection between the electronic ink screen display system 100 and the wireless network, is used for remote access and data transmission, receives display content, control instructions and the like sent by a remote server or terminal, and the Bluetooth module 202 is used for short-range wireless communication, realizes pairing and data interaction with peripheral Bluetooth devices, and the WiFi module 201 and the Bluetooth module 202 are combined to improve the wireless connection flexibility and applicability of the electronic ink screen display system 100.

[0075] It should be noted that, as Figure 4The ESP32-S3 chip shown in the master module 2 is only exemplary, and master control chips such as STM32H7+ESP8266, RTL8720, BK7231, etc. with a wireless communication module 20 inside can also be used. In this embodiment, it is not specifically limited as long as it can realize data interaction with the display module 3 to drive the display content, digital signal transmission with the audio module 1 to process audio data, and data transmission with external devices through the built-in wireless communication module 20 to coordinate the work of each module. The specific chip model can be selected according to actual needs.

[0076] Specifically, as Figure 4 The specific circuit layout of the master control module 2 includes the master control pull-up circuit 21 of the master control module 2, wherein ESP_RESET is used to reset the ESP32-S3 chip, and the pin is pulled low to trigger the reset of the ESP32-S3 chip, so that it returns to the initial state. The ESP_BOOT pin determines whether the ESP32-S3 chip enters the download mode. When the ESP32-S3 chip starts, if the ESP_BOOT pin is low, the ESP32-S3 chip enters the download mode, and after the start is completed, the pin is a normal GPIO pin.

[0077] The ESP32-S3 chip has rich pin resources and most of them have multiplexing properties. In actual application, it can be flexibly configured according to needs. At the same time, although the standard interfaces of the ESP32-S3 chip such as I2C and I2S have fixed functions, the related functions can be allocated to different pins. When there is no specific function defined, the pin is the default normal GPIO pin. It should be noted that the positions and functions of power pins such as VCC and GND and special function pins such as RST and BOOT in the ESP32-S3 chip are fixed. In addition to these, the functions of other pins do not need to be fixed. The multiplexing feature allows the same pin to assume different roles in addition to the fixed function pins.

[0078] Further, in a non-limiting specific embodiment, the analog-to-digital conversion circuit 12 uses an ES7210 chip.

[0079] Specifically, the audio data output interface of the ES7210 chip used by the analog-to-digital conversion circuit 12 is connected with the I2S interface of the ESP32-S3 chip used by the master control module 2, realizing audio data transmission.

[0080] It should be noted that in this embodiment, the specific circuit layout of the master control module 2 and the analog-to-digital conversion circuit 12 is not limited. Figure 4 and Figure 6 A specific example is shown in which Figure 4 is a circuit schematic diagram of the master control module 2 using an ESP32-S3 chip as the master control chip,Figure 6 A circuit schematic diagram of the analog-to-digital conversion circuit 12 employing the ES7210 chip.

[0081] Specifically, as shown in the specific circuit layout of the analog-to-digital conversion circuit 12 employing the ES7210 chip, the I2C selection circuit 121 of the analog-to-digital conversion circuit 12 is included, wherein A1 and A0 are two-bit selections in the I2C address, and are address selections in the I2C communication in the ES7210 chip. Figure 6

[0082] The microphone circuit 13 is used to collect user voice to generate analog audio data and transmit the audio data to the data input interface of the analog-to-digital conversion circuit 12.

[0083] In a non-limiting specific embodiment, the microphone circuit 13 has left and right channels that respectively collect sound signals in different directions, making the collected audio voice more accurate, and in combination with the echo cancellation circuit 15 provided in the audio module 1, the left and right channels can distinguish sound sources in different directions, improving the quality and practicality of audio collection. Figure 7 An example of a specific microphone circuit 13 with left and right channels is shown in FIG.

[0084] Specifically, the echo cancellation circuit 15 achieves echo cancellation through a multi-section filter circuit, and the echo cancellation circuit 15 includes resistors R47, R52, R48, R49, R53, capacitors C93, C100, and other elements to form a filter circuit. By using resistance voltage division and capacitor charging and discharging principles, signals in a specific frequency range are passed through and offset the echo, reducing noise interference and effectively improving audio clarity.

[0085] Further, referring to Figure 5 In a non-limiting specific embodiment, the digital-to-analog conversion circuit 11 employs the ES8311 chip.

[0086] Specifically, the ESP32-S3 chip employed by the master control module 2 and the ES8311 chip employed by the digital-to-analog conversion circuit 11 transmit audio digital signals through the I2S interface.

[0087] It should be noted that in this embodiment, the specific circuit layout of the digital-to-analog conversion circuit 11 is not limited. Figure 5 A circuit schematic diagram of the digital-to-analog conversion circuit 11 employing the ES8311 chip.

[0088] Specifically, as shown in the specific circuit layout of the digital-to-analog conversion circuit 11 employing the ES8311 chip, the I2C selection circuit 121 of the analog-to-digital conversion circuit 12 is included, wherein A1 and A0 are two-bit selections in the I2C address, and are address selections in the I2C communication in the ES7210 chip. Figure 5 ​The shown digital-to-analog conversion circuit 11 adopts the specific circuit layout of ES8311 chip, and the audio output processing circuit 111 including the digital-to-analog conversion circuit 11, wherein PA_INL+ and PA_INL- are interfaces connected to the power amplifier 141 for further amplifying the audio signal, and the circuit composed of the capacitor C111, C112 and the resistor R55 plays a role of filtering and signal conditioning.

[0089] Referring to Figure 8 , the playing circuit 14 is used for playing the audio data, and the playing circuit 14 includes the power amplifier 141 for power amplifying the analog audio signal, and the ES8311 chip adopted by the digital-to-analog conversion circuit 11 receives the digital signal to be converted, and forms the analog audio data after conversion by the ES8311 chip and transmits the analog audio data from the corresponding audio output pin to the power amplifier 141 in the playing circuit 14, and the power amplifier 141 enhances the signal driving capability of the audio data.

[0090] In a non-limiting specific embodiment, the power amplifier 141 adopts the NS4150B chip, Figure 5 The specific circuit schematic diagram of the ES8311 chip as the digital-to-analog conversion circuit 11 is shown in Figure 8 The specific circuit schematic diagram of the NS4150B chip as the playing circuit 14 of the power amplifier 141 is shown in the embodiment, and the specific circuit layout of the playing circuit 14 and the digital-to-analog conversion circuit 11 is not limited.

[0091] Specifically, as Figure 8 The specific circuit schematic diagram of the playing circuit 14 includes the filter circuit 142, wherein the inductors L7, L8 and the capacitors C118, C120 constitute a filter network, and the high-frequency noise and the noise in the audio data output by the power amplifier 141 are filtered out.

[0092] It should be noted that the playing circuit 14 further includes a loudspeaker (not shown in the figure), and the loudspeaker is connected to the playing circuit 14 through the PH1.25-2PIN interface in the filter circuit 142, and the audio data processed by the power amplifier 141 is output by the loudspeaker for playing.

[0093] Specifically, the audio triggered AI conversation function implementation process is exemplarily shown as follows in the embodiment: the user input voice is collected by the microphone circuit 13, converted into a digital signal by the analog-digital conversion circuit 12 of the audio module 1 and transmitted to the host module 2, the host module 2 sends the digital signal to an external device for artificial intelligence large language model analysis and processing through the built-in wireless communication module 20, the wireless communication module 20 receives the returned conversation response data, transmits the conversation response data to the digital-analog conversion circuit 11 after being analyzed by the host module 2, converts the conversation response data into analog audio data, and outputs the voice response of the analog audio data amplified by the power amplifier 141 through the playing circuit 14; at the same time, the echo cancellation circuit 15 processes the bidirectional signal to avoid interference, and realizes the coherent artificial intelligence conversation interaction.

[0094] Further, the electronic ink screen display system 100 provided by the utility model has an offline playing mode, supports local storage of conversation content, facilitates user to trace back historical interaction information, and can still realize playing of historical conversation content when there is no network.

[0095] Specifically, referring to Figure 16 , the electronic ink screen display system 100 further comprises a storage module 7 connected with the host module 2.

[0096] Understandably, the storage module 7 adopts a TF card, and when networking, the historical conversation audio data of the user and the electronic ink screen display system 100, corresponding text or display content are stored into the storage module 7 after being processed by the host module 2. When there is no network, the user triggers an offline playing instruction, the host module 2 reads the stored historical conversation data from the storage module 7, if the historical conversation data is audio data, the audio data is transmitted to the digital-analog conversion circuit 11 to be converted into an analog signal, and then the analog signal is amplified by the power amplifier 141 and played through the playing circuit 14; at the same time, the conversation related text or pattern can be displayed in the display module 3, facilitating the user to trace back the interaction information.

[0097] Specifically, as shown in the specific circuit layout of the storage module 7, Figure 16 the specific circuit layout of the storage module 7 comprises a TF card interface circuit 71 and a pull-up circuit 72, wherein the TF card interface circuit 71 is used for connecting a TF storage card, and communicates with the host module 2 through SPI through SD_D1, SD_D2, SD_CS and the like pins to realize reading and writing of data, and the pull-up circuit 72 pulls up the level of the corresponding pins through R4-R12 and the like pull-up resistors, so that the corresponding pins are in a high level state and the driving capability is enhanced.

[0098] Further, referring to Figure 15 , the electronic ink screen display system 100 further comprises a clock module 5 connected with the host module 2.

[0099] It can be understood that the clock module 5 provides an accurate and stable time reference for the electronic ink screen display system 100, records the interaction time, and triggers tasks such as refreshing the display content, playing audio, etc.

[0100] Exemplarily, in one non-limiting specific embodiment, the clock module 5 adopts the PCF8563ATL chip, and the clock module 5 adopting the PCF8563ATL chip is connected with the ESP32-S3 chip adopted by the main control module 2 through I2C communication connection to realize transmission of time data and time calibration.

[0101] Specifically, the main control module 2 sends control instructions to the audio module 1, the display module 3, and the storage module 7 according to the time signal of the clock module 5 to realize time control of the remaining function execution modules, for example, the main control module 2 timestamps the data signal stored in the storage module 7 according to the time signal of the clock module 5, which is convenient for time backtracking.

[0102] Further, Figure 11 The electronic ink screen display system 100 includes an interface module 4, which is a Type-C USB interface module 4 connected with the main control module 2.

[0103] It can be understood that the Type-C USB interface module 4 realizes physical connection of the electronic ink screen display system 100 with external devices, and the Type-C USB interface module 4 can provide working power for the electronic ink screen display system 100 and interact with data with computers and other devices.

[0104] Specifically, the data pins (D+, D-) of the Type-C USB interface module 4 are connected with the USB interface or corresponding GPIO pins of the main control module 2 to realize data communication.

[0105] Further, the electronic ink screen display system 100 includes a power management module 6 connected with the main control module 2.

[0106] It can be understood that the power management module 6 provides stable power supply for each functional module of the electronic ink screen display system 100, the power management module 6 receives power input by the Type-C USB interface module 4 and sequentially distributes it to other circuits, manages and distributes discharge process of the internal battery of the electronic ink screen display system 100 when the USB is not connected with the Type-C USB interface module 4, and adjusts output voltage to match different module requirements.

[0107] It should be noted that the power management module 6 supplies power for other functional modules except the key module 9, the power management module 6 provides 3.3V power supply for the display module 3, the clock module 5, the audio module 1 and the circuit of the storage module 7 except the power amplifier 141, provides power greater than 3.3V for the power amplifier 141, and the GND pins of each module are connected with the ground end of the power management module 6, forming a complete power supply loop.

[0108] Specifically, the connection relationship of each module in the electronic ink screen display system 100 is shown in the block diagram as shown in the figure. Figure 1 The power management module 6 directly supplies power for other functional modules, the master control module 2 sends a command to the power management module 6, and the power management module 6 outputs corresponding power for each module.

[0109] Further, in a non-limiting specific embodiment, the power management module 6 uses an AXP2101 power management chip as shown in the figure. Figure 14

[0110] Further, the electronic ink screen display system 100 further comprises a temperature and humidity sensing module 8, which is electrically connected with the master control module 2.

[0111] It can be understood that the temperature and humidity sensing module 8 collects temperature and humidity data in the environment in real time, and provides environmental parameters for the electronic ink screen display system 100, and at the same time, the display module 3 using the electronic ink screen is matched with the temperature and humidity sensing module 8, converts the collected temperature and humidity analog signals into digital signals, and then transmits them to the master control module 2 for processing, and then transmits them to the display module 3 through the master control module 2 to display the temperature and humidity information on the electronic ink screen.

[0112] It should be noted that the electronic ink screen display system 100 can support more sensing modules to be connected, including but not limited to ambient light sensors, human presence sensors, air pressure, humidity, air quality sensors, and vibration, tilt detectors, etc., to realize multi-functional integration of the electronic ink screen display system 100, and expand the multi-environment detection function, and the sensing modules expanded into the electronic ink screen display system 100 are not specifically limited in the utility model.

[0113] Specifically, all sensing modules are connected with the master control module 2 through a unified I2C or SPI interface, the master control module 2 is connected with the display module 3, so that the related sensing parameters obtained by the sensing module are displayed on the display module 3.

[0114] In the embodiment, the specific circuit diagram of the temperature and humidity sensing module 8 is shown in the figure. Figure 18

[0115] ​​Further, the electronic ink screen display system 100 comprises a key module 9 connected with the main control module 2.

[0116] It can be understood that the key module 9 is electrically connected with the main control module 2 to provide a local operation interface for the user to input operation instructions, such as switching the display content, starting or shutting down the power supply of the electronic ink screen display system 100, or waking up the electronic ink screen display system 100 from the standby module through the key module 9, and realizing manual control of the device.

[0117] Specifically, the key module 9 is electrically connected with the main control module 2 through GPIO pins, and the pressing of the key changes the level signal of the corresponding pin. After the main control module 2 detects the level change, it analyzes the corresponding operation instruction and executes it. In this embodiment, the GPIO pins connected with the key module 9 and the main control module 2 are not specifically limited and are set according to the needs.

[0118] Further, the key module 9 comprises an LED lamp.

[0119] It can be understood that the LED lamp serves as a status indicator. When the user operates the key, the LED lamp can feedback whether the operation is received by the electronic ink screen display system 100 through the light-off or color change, enhancing the interactivity and observability, and enabling quick understanding of the working status of each module in the electronic ink screen display system 100.

[0120] Specifically, as shown in the specific circuit layout of the key module 9, Figure 17 the specific circuit layout of the key module 9 comprises a key circuit 91 of the key module 9 and an LED indication circuit 92.

[0121] The key circuit 91 is connected with the key Key1 and the key Key2, and the corresponding pin of the key is grounded when the user presses the key, realizing the input of a trigger signal. The LED indication circuit 92 controls the light-off of the LED1 and the LED2 through the GPIO pins such as the GP45 pin and the GP42 pin, indicating the status of the electronic ink screen display system 100.

[0122] In one non-limiting specific embodiment, as shown in the pin function allocation table, Figure 19 the pin function allocation table shows the function definition of each pin of the ESP32-S3 chip adopted by the main control module 2 in the electronic ink screen display system 100 and the interaction with each functional module. ePaper represents the display module 3, Audio represents the audio module 1, SD Card represents the storage module 7, RTC represents the clock module 5, PMU represents the power management module 6, and OTS represents the key module 9.

[0123] Among them, the GPIO4 pin is associated with the key module 9 for receiving user input instructions; the GPIO6 pin corresponds to the interrupt (RTC_INT) function of the clock module 5, which guarantees the time interaction function of the clock module 5; the GPIO14 to GPIO18 pins are used for I2S communication with the audio module 1 to realize functions such as audio data collection, conversion and transmission, audio playback, echo cancellation, etc.; the GPIO47 pin and the GPIO48 pin are used for I2C communication of the audio module 1 and the clock module 5, the power management module 6, and the temperature and humidity sensing module 8, and the data interaction and control instruction transmission with the host module 2 are realized through the I2C protocol, and the ESP32-S3 chip adopted by the host module 2 cooperates with other functional modules to realize data interaction and electrical connection between each functional module through each pin and various communication protocols.

[0124] Specifically, the I2C communication is a communication protocol with a multi-master-slave architecture feature, and the host can simultaneously connect multiple slave devices through the same set of I2C interfaces, and only SDA (data line) and SCL (clock line) are needed to realize bidirectional data transmission, which is used for the state configuration and data reading of the ESP32-S3 chip adopted by the host module 2 to the audio module 1 and the clock module 5, the power management module 6, and the temperature and humidity sensing module 8; the I2S communication is a communication protocol designed for audio devices, which is used to transmit audio data between the host module 2 and the audio module 1 to guarantee the collection and playback of audio.

[0125] Referring to Figure 20 The utility model provides a kind of electronic ink screen display equipment 200, and electronic ink screen display equipment 200 includes display equipment main body 300 and like the electronic ink screen display system 100 of first embodiment.

[0126] Specifically, the display equipment main body 300 provides a physical carrier and support for the electronic ink screen display system 100, integrates each functional module component in the electronic ink screen display system 100 of the first embodiment to form a complete device, protects the internal circuit module from environmental influences, and at the same time, fixes components such as electronic ink screen, loudspeaker and microphone through structural design to ensure the stable form of the electronic ink screen display equipment 200.

[0127] The above is only a preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electronic ink display system, characterized by: The electronic ink screen display system comprises a display module and a master control module for driving the display module, the master control module is internally provided with a wireless communication module, the master control module adopts an ESP32-S3 chip internally provided with the wireless communication module, the wireless communication module comprises a WiFi module and a Bluetooth module; The electronic ink screen display system further comprises an audio module electrically connected with the master control module, the audio module comprises a digital-to-analog conversion circuit for converting digital signals into audio data and an analog-to-digital conversion circuit for converting the audio data into the digital signals, and the digital-to-analog conversion circuit and the analog-to-digital conversion circuit are respectively connected with the master control module; The electronic ink screen display system further comprises a temperature and humidity sensing module, and the temperature and humidity sensing module is electrically connected with the master control module.

2. The electronic ink display system of claim 1, wherein: The audio module further comprises a microphone circuit for collecting voice, an echo cancellation circuit for eliminating echo, and a playing circuit for playing the audio data, the microphone circuit is connected with the analog-to-digital conversion circuit, the echo cancellation circuit is connected with the analog-to-digital conversion circuit, and the playing circuit is connected with the digital-to-analog conversion circuit.

3. The electronic ink display system of claim 2, wherein: The analog-to-digital conversion circuit adopts an ES7210 chip.

4. The electronic ink display system of claim 1, wherein: The electronic ink screen display system comprises an interface module, the interface module is a Type-C USB interface module, and the Type-C USB interface module is connected with the master control module.

5. The electronic ink display system of claim 1, wherein: The electronic ink screen display system further comprises a clock module, and the clock module is connected with the master control module.

6. The electronic ink display system of claim 1, wherein: The electronic ink screen display system comprises a power management module connected with the master control module.

7. The electronic ink display system of claim 1, wherein: The electronic ink screen display system further comprises a storage module connected with the master control module.

8. The electronic ink display system of claim 1, wherein: The display module and the master control module are connected through an SPI communication protocol.

9. The electronic ink display system of claim 1, wherein: The electronic ink screen display system comprises a key module, and the key module is connected with the master control module.

10. An electronic ink display device, characterized by: The electronic ink screen display device comprises a display device body and the electronic ink screen display system as claimed in any one of claims 1-9.

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