Wireless screen projection device with connection status feedback mechanism

Abstract

This invention provides a wireless screen projection device with a connection status feedback mechanism. The main control module determines the working status of the video input module and the wireless transmission module, and outputs interactive information such as "starting up," "connecting," "connection successful," and "screen projection failed" in real time on the display module. This significantly improves the user's awareness of the device's status and avoids blind operation. Based on traditional wireless screen projection devices, this invention comprehensively enhances user experience, system stability, and troubleshooting efficiency by introducing a main control module, status judgment logic, a TFT display screen, a vibration feedback module, and various interactive designs.

Description

Technical Field

[0001] This utility model relates to the field of wireless screen projection technology, and in particular to a wireless screen projection device with a connection status feedback mechanism. Background Technology

[0002] With the continuous development of multimedia display technology, 4K wireless projection devices are widely used in school auditoriums, conference rooms, large studios, home theaters, and other venues. Users can wirelessly transmit images to large-screen display devices such as TVs, projectors, and conference tablets via mobile phones, tablets, and laptops. Existing wireless projection devices mostly implement video transmission in a "plug-and-play" manner, but they have significant shortcomings in human-computer interaction, status feedback, and fault diagnosis.

[0003] First, most wireless screen mirroring devices on the market currently lack a display screen. Users cannot clearly determine whether the device has successfully connected or whether screen mirroring has completed, often requiring feedback from a display terminal or mobile app. This complex interaction process results in a poor user experience. Second, if the device malfunctions during use, such as video signal loss, wireless connection interruption, or resolution incompatibility, users cannot obtain effective prompts from the device itself, forcing them to perform blind troubleshooting, significantly increasing maintenance costs and time. Furthermore, existing devices lack reasonable button anti-accidental touch mechanisms and physical debounce treatments, potentially leading to accidental button presses and status confusion during use.

[0004] In summary, the problems existing in the current technology urgently need to be solved. Utility Model Content

[0005] This invention provides a wireless screen projection device with a connection status feedback mechanism to overcome the shortcomings of the prior art and achieve real-time feedback of the screen projection status.

[0006] This utility model provides a wireless screen projection device with a connection status feedback mechanism, including: a video input module, a main control module, a wireless transmission module, and a display module;

[0007] The video input module is used to receive video signals from the source device;

[0008] The main control module is used to receive the video signal and encode the video data into video data in a preset format.

[0009] The main control module is also used to determine the screen projection status information based on the working status of the video input module and the wireless transmission module;

[0010] The wireless transmission module has its input end connected to the output end of the main control module, and is used to send the video data to the terminal to be projected.

[0011] The display module has its input terminal connected to the output terminal of the main control module, and is used to display the projection status information.

[0012] According to the present invention, a wireless projection device with a connection status feedback mechanism is provided, wherein the display module further includes a backlight control circuit, and the backlight control circuit includes a transistor, a current limiting resistor and a backlight power supply.

[0013] The transistor is used to adjust the backlight brightness according to the PWM signal sent by the main control module;

[0014] The main control module adjusts the brightness of the display module by changing the duty cycle of the PWM signal.

[0015] According to the present invention, a wireless screen projection device with a connection status feedback mechanism is provided, the wireless screen projection device further includes a linear motor module;

[0016] The linear motor module has its input terminal connected to the PWM output pin of the main control module, and is used to adjust the vibration feedback intensity according to the PWM signal output by the main control module.

[0017] According to this utility model, a wireless screen projection device with a connection status feedback mechanism is provided.

[0018] The button module includes at least one physical button switch, the two ends of which are respectively connected to the GPIO input pin of the main control module and the ground terminal.

[0019] The button module also includes a capacitor element, which is connected in parallel with the physical button switch to form a physical debouncing circuit.

[0020] The main control module determines the user operation based on the level change of the GPIO input pin and controls the display module or linear motor module to output corresponding feedback.

[0021] According to this utility model, a wireless screen projection device with a connection status feedback mechanism is provided.

[0022] The video conversion circuit includes a DP receiver chip and a MIPI output driver chip. The input terminal of the DP receiver chip is connected to the Type-C connector of the video input module.

[0023] The output of the DP receiver chip is connected to the input of the MIPI output driver chip, and the output of the MIPI output driver chip is connected to the video input pin of the main control module.

[0024] According to the present invention, a wireless screen projection device with a connection status feedback mechanism is provided, wherein the wireless transmission module includes a WIFI unit and a Bluetooth unit;

[0025] The WIFI unit is used to wirelessly transmit compressed video data to devices such as TVs, conference tablets, or projectors.

[0026] The Bluetooth unit is used to assist in pairing and connection or to expand peripherals.

[0027] According to the present invention, a wireless screen projection device with a connection status feedback mechanism is provided, wherein the display module is connected to the main control module via an SPI bus; the SPI bus includes MOSI, MISO, CLK and CS signal lines.

[0028] According to the present invention, a wireless screen projection device with a connection status feedback mechanism is provided. The main control module is further used to generate a fault prompt code when the video input module does not receive a valid signal or the wireless transmission module has a network abnormality, and to visualize the fault prompt code through the display module.

[0029] The fault code corresponds to a specific error state.

[0030] According to the present invention, a wireless screen projection device with a connection status feedback mechanism is provided. The wireless screen projection device further includes a power supply module, the input of which is a TYPE C power supply interface, and the output of which is connected to a power management chip.

[0031] The power management chip is used to convert the external power supply voltage into different voltage levels suitable for the video processing module, the main control module, the display module, and the wireless transmission module.

[0032] According to the present invention, a wireless screen projection device with a connection status feedback mechanism is provided. The main control module is also connected to a fault status LED light assembly. The LED assembly includes multi-color indicator lights. When the display module fails to work properly, the screen projection status information can be displayed through the LED colors.

[0033] This invention provides a wireless screen projection device with a connection status feedback mechanism. The main control module determines the working status of the video input module and the wireless transmission module, and outputs interactive information such as "starting up," "connecting," "connection successful," and "screen projection failed" in real time on the display module. This significantly improves the user's awareness of the device's status and avoids blind operation. Based on traditional wireless screen projection devices, this invention comprehensively enhances user experience, system stability, and troubleshooting efficiency by introducing a main control module, status judgment logic, a TFT display screen, a vibration feedback module, and various interactive designs. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a wireless screen projection device with a connection status feedback mechanism provided by this utility model;

[0036] Figure 2 This is a schematic diagram of the backlight control circuit provided by this utility model;

[0037] Figure 3 This is a structural schematic diagram of the linear motor module provided by this utility model;

[0038] Figure 4 This is a schematic diagram of the button module provided by this utility model;

[0039] Figure 5 This is a structural diagram of the display module and main control module provided by this utility model. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] To address the problems in existing technologies, this utility model proposes a wireless screen projection device with a connection status feedback mechanism to achieve real-time feedback on the screen projection status. The wireless screen projection device with this connection status feedback mechanism is described below, as follows... Figure 1 As shown, it includes, but is not limited to, the following modules: video input module, main control module, wireless transmission module, and display module;

[0042] The video input module is used to receive video signals from the source device;

[0043] The main control module is used to receive the video signal and encode the video data into video data in a preset format.

[0044] The main control module is also used to determine the screen projection status information based on the working status of the video input module and the wireless transmission module;

[0045] The wireless transmission module has its input end connected to the output end of the main control module, and is used to send the video data to the terminal to be projected.

[0046] The display module has its input terminal connected to the output terminal of the main control module, and is used to display the projection status information.

[0047] The video input module is used to receive audio and video signals from source devices such as mobile phones, laptops, or tablets. This module can use a Type-C interface, supports various standard resolution signal inputs, with a maximum support of 3840×2160@30Hz, and is compatible with common resolutions such as 1024×768@60Hz and 1920×1080@60Hz, ensuring broad compatibility with different terminal devices. The video signal can be in DisplayPort or HDMI format and will be converted by subsequent circuitry.

[0048] The main control module is connected to the video input module and is used to receive and process the input video signal. The main control module integrates a video processing chip (such as a SoC chip that supports H.264 / H.265 encoding) to convert and compress the received raw video signal into video data in a preset format (such as H.264) suitable for wireless transmission.

[0049] The main control module also has a status recognition function, which can monitor the operating status of the video input module and the wireless transmission module in real time. For example, when the main control module detects that the video input module has no signal input or the wireless transmission module has an abnormal network connection, it will automatically generate screen projection status information, such as "Not connected", "Network interrupted", "Connection successful", "Screen projection in progress", etc.

[0050] The projection status information is processed by the main control module and then sent to the display module for visual display.

[0051] The input of the wireless transmission module connects to the output of the main control module. It receives the encoded video data from the main control module and transmits it wirelessly to an external display terminal, such as a television, a conference all-in-one machine, or a projector. The wireless transmission module may include a Wi-Fi unit, supporting dual-band (2.4GHz / 5GHz) communication, and features strong anti-interference capabilities and high data bandwidth. It may also integrate a Bluetooth module for initial pairing or peripheral connection.

[0052] The input terminal of the display module is connected to the main control module to receive and display the projection status information generated by the main control module. Preferably, the display module uses a TFT LCD display screen, which has advantages such as high brightness, low power consumption, and fast response. The display module can also automatically adjust the backlight brightness according to the PWM signal output by the main control module to adapt to different ambient lighting conditions.

[0053] Through the display module, users can intuitively understand the current connection status of the device, such as whether the input signal has been recognized, whether the connection to the receiving device has been successful, and whether there are any transmission abnormalities, which effectively improves the usability and ease of operation of the device.

[0054] The main control module is a hardware processing unit integrated within the wireless projection device, including but not limited to a microcontroller (MCU), digital signal processor (DSP), or application-specific integrated circuit (ASIC). This main control module is connected to both the video input module and the wireless transmission module via physical signal lines, enabling it to acquire the hardware operating status signals of both in real time.

[0055] Specifically, the main control module determines the validity and status of the video input signal by reading the signal validity indicator lines of the video input module (such as the video signal validity detection pin, level change or interrupt signal); at the same time, the main control module monitors the real-time working status of the wireless transmission through the status feedback interface of the wireless transmission module (such as the link connection status indicator signal, data transmission confirmation signal or error detection pin).

[0056] Based on the aforementioned hardware status signals, the main control module analyzes and judges the signals through its internally programmed logic, thereby generating corresponding screen projection status information (such as "screen projection in progress," "connection failed," "signal lost," etc.). This screen projection status information is sent to the display module through the hardware driver interface, enabling real-time status feedback on the physical display screen.

[0057] The workflow is as follows:

[0058] Users can connect this wireless screen projector to the source device via a TYPE-C or USB interface;

[0059] The video input module receives the video signal from the source device and transmits it to the main control module;

[0060] The main control module completes the video encoding process and sends the video data to the external display device via the wireless transmission module;

[0061] Meanwhile, the main control module generates status information based on the detected module operating status;

[0062] The status information is sent to the display module for real-time display, so as to realize the visual feedback of the projection status.

[0063] This invention overcomes the problems of unknown projection status and unfriendly interaction in the prior art by integrating a status recognition mechanism and multimodal display feedback, thus greatly improving the user experience and device maintainability.

[0064] As a further optional embodiment, the display module further includes a backlight control circuit, which includes a transistor, a current-limiting resistor, and a backlight power supply.

[0065] The transistor is used to adjust the backlight brightness according to the PWM signal sent by the main control module;

[0066] The main control module adjusts the brightness of the display module by changing the duty cycle of the PWM signal.

[0067] like Figure 2 As shown, the backlight control circuit consists of a transistor, a current-limiting resistor, and a backlight power supply, and is used to adjust the backlight brightness of the TFTLCD display screen.

[0068] Specifically:

[0069] The PWM output pin of the main control module is connected to the base of the transistor;

[0070] The collector of the transistor is connected to the backlight power supply, and the emitter is connected to the backlight input terminal of the display screen.

[0071] A current-limiting resistor is connected in series between the base and the PWM output pin to protect the transistor and limit the drive current.

[0072] In this embodiment, the main control module controls the conduction level of the transistor by adjusting the duty cycle of the PWM signal, thereby changing the backlight current of the display module and achieving dynamic brightness adjustment.

[0073] When the PWM duty cycle is high, the transistor conduction time is long, the backlight current increases, and the screen brightness is improved.

[0074] When the PWM duty cycle is low, the transistor conduction time is short, the backlight current decreases, and the screen brightness decreases.

[0075] This backlight adjustment mechanism can not only adapt to the lighting requirements of different usage environments, but also effectively reduce power consumption, extend the service life of the device, and improve the overall user experience.

[0076] As a further optional embodiment, the wireless projection device also includes a linear motor module;

[0077] The linear motor module has its input terminal connected to the PWM output pin of the main control module, and is used to adjust the vibration feedback intensity according to the PWM signal output by the main control module.

[0078] like Figure 3 As shown, the linear motor module includes a circular linear motor, a drive circuit, and connecting wires. The input terminal of the linear motor module is connected to the PWM output pin of the main control module via wires for vibration feedback control.

[0079] During the operation of the linear motor module:

[0080] After the user performs a specific operation (such as pressing the screen mirroring button), the main control module outputs a PWM control signal with a certain duty cycle.

[0081] The PWM signal is modulated by the driving circuit to drive the linear motor and generate vibration feedback of corresponding amplitude.

[0082] By adjusting the duty cycle and frequency of the PWM signal, the intensity and duration of vibration can be precisely controlled.

[0083] The introduction of this linear motor module provides tactile feedback to users. For example, it can provide vibrations of varying intensities when the device's projection status changes (such as "connection successful" or "connection failed"), further enhancing the user's interactive experience and sense of confirmation.

[0084] In addition, to accommodate different user preferences or usage environments, the main control module can be configured with multiple vibration intensity levels (such as 20%, 40%, 60%, 80%, 100%), and the settings interface can be fed back through the display module, allowing users to select the vibration feedback intensity themselves.

[0085] As a further optional embodiment, the button module includes at least one physical button switch, the two ends of which are respectively connected to the GPIO input pin of the main control module and the ground terminal.

[0086] The button module also includes a capacitor element, which is connected in parallel with the physical button switch to form a physical debouncing circuit.

[0087] The main control module determines the user operation based on the level change of the GPIO input pin and controls the display module or linear motor module to output corresponding feedback.

[0088] like Figure 4 As shown, the button module includes several physical buttons, such as a "screen mirroring button" and a "function setting button". Each button's two ends are connected to the GPIO input pin of the main control module and the ground wire, respectively, and a capacitor is connected in parallel with the button to form a physical debouncing circuit.

[0089] When a user presses a button, the mechanical contacts may bounce multiple times, causing the signal level to fluctuate briefly. This capacitor effectively filters out these interference pulses through a charging and discharging buffering process of voltage changes, achieving a smooth transition of the signal level and preventing the system from misinterpreting it as multiple triggers.

[0090] After a button press, the main control module can perform corresponding operations based on different inputs, including:

[0091] Controls the access or interruption of video signals;

[0092] The vibration feedback module is invoked to issue a response prompt.

[0093] Update the current operation status on the display module, such as "Connecting", "Disconnected", "Error Code", etc.

[0094] By combining physical debounce and feedback mechanisms, this button module not only improves operational stability but also enhances the reliability and intuitiveness of human-computer interaction.

[0095] As a further optional embodiment, the wireless projection device also includes a video conversion circuit;

[0096] The video conversion circuit includes a DP receiver chip and a MIPI output driver chip. The input terminal of the DP receiver chip is connected to the Type-C connector of the video input module.

[0097] The output of the DP receiver chip is connected to the input of the MIPI output driver chip, and the output of the MIPI output driver chip is connected to the video input pin of the main control module.

[0098] The video conversion circuit is located between the video input module and the main control module. Its input terminal is connected to the video input module (such as a TYPE-C interface) to receive DisplayPort (DP) video signals output from the source device; its output terminal is connected to the image input pin of the main control module to provide standardized image signals for subsequent encoding processing.

[0099] The video conversion circuit integrates the following:

[0100] A DP to MIPI bridge chip is used to perform protocol conversion from DisplayPort signals to MIPI signals;

[0101] The frame rate adjustment unit and resolution matching unit automatically and dynamically adjust the frame rate (e.g., from 60Hz to 30Hz) or resolution (e.g., from 3840×2160 to 1920×1080) of the input video signal according to the needs of the system or receiver.

[0102] The design of this conversion circuit not only improves the system's compatibility with different source devices, but also provides a unified data format for subsequent encoding and compression, ensuring the smoothness and stability of video transmission.

[0103] This implementation method is particularly suitable for devices such as laptops, tablets, and mobile phones equipped with output ports such as TYPE-C and MiniDP, effectively solving problems such as difficulty in adapting different video formats and exceeding resolution limits.

[0104] As a further optional embodiment, the wireless transmission module includes a WIFI unit and a Bluetooth unit;

[0105] The WIFI unit is used to wirelessly transmit compressed video data to devices such as TVs, conference tablets, or projectors.

[0106] The Bluetooth unit is used to assist in pairing and connection or to expand peripherals.

[0107] The wireless transmission module integrates a WIFI unit and a Bluetooth unit, which are used to realize high-speed transmission of video content and quick pairing and control expansion of devices, respectively.

[0108] The Wi-Fi unit is connected to the video output of the main control module. It receives H.264 or H.265 format video data encoded and compressed by the main control module and transmits this data to a remote display device, such as a smart TV, conference tablet, or projector, via a 2.4GHz and / or 5GHz dual-band wireless network. This Wi-Fi module supports the 802.11 a / b / g / n / ac protocol, featuring high speed, low latency, and stable anti-interference performance, ensuring smooth 4K video transmission.

[0109] The Bluetooth unit is connected to the data control port of the main control module and is mainly used for the following functions:

[0110] Assisted pairing and connection: Before the first screen mirroring, it quickly pairs with the receiving device via Bluetooth, reducing the WIFI connection initialization time;

[0111] Peripheral expansion support: Supports connection to wireless remote control, Bluetooth mouse, keyboard and other devices to enable remote control of the projected content;

[0112] Status synchronization function: When the network is unreliable or the display module malfunctions, Bluetooth can serve as an auxiliary channel to provide screen projection status prompts or system feedback information.

[0113] This implementation method integrates WIFI and Bluetooth functions, which enhances the ease of use and scalability of the device while ensuring video transmission efficiency, thereby improving the overall user experience.

[0114] As a further optional embodiment, the display module is connected to the main control module via an SPI bus; the SPI bus includes MOSI, MISO, CLK and CS signal lines.

[0115] like Figure 5 As shown, to achieve high-speed data communication and status information exchange between the TFT LCD display module and the main control module, the display module and the main control module are connected via an SPI (Serial Peripheral Interface) bus. This SPI bus includes at least the following four control signal lines:

[0116] MOSI (Master Out Slave In): The signal line through which the master control module sends data to the display module;

[0117] MISO (Master In Slave Out): Signal line for the display module to feed data back to the main control module (optional);

[0118] CLK (Clock): Clock signal line, provided by the main control module for data synchronization;

[0119] CS (Chip Select): Chip select signal line. The main control module pulls this signal line low to select the display module.

[0120] The main control module can send the current projection status (such as "connecting", "projection successful", "projection failed" etc.) to the TFT LCD display module in real time in the form of data frames, so that the module can display the status in text or graphic form.

[0121] This implementation method offers the following technical advantages: high communication speed and strong anti-interference capability, suitable for high-frequency dynamic refreshing of text and image information; simple communication structure and low interface resource consumption, facilitating modular system design; easy expansion of multiple display sub-modules or multiple sensor modules, sharing a single SPI bus structure. Through the application of the SPI bus, this wireless projection device possesses stable and reliable "device status visualization" capabilities, significantly enhancing user experience and system interactive intelligence.

[0122] As a further optional embodiment, the main control module is also used to generate a fault prompt code when the video input module does not receive a valid signal or the wireless transmission module network is abnormal, and to visualize the fault prompt code through the display module;

[0123] The fault code corresponds to a specific error state.

[0124] In this embodiment, the main control module has built-in fault detection and diagnosis logic, which can monitor the system's operating status in real time. Specifically:

[0125] When the main control module detects that the video input module is not connected to a valid video signal (e.g., no connection, incorrect signal format, poor interface contact, etc.), it will identify it as "video input abnormal" and generate a corresponding fault code (e.g., E01).

[0126] When a network anomaly is detected in the wireless transmission module (such as WiFi disconnection, weak signal, inability to pair, or IP conflict), the main control module will identify it as "network connection anomaly" and generate a corresponding fault code (such as E02).

[0127] The fault code is sent to the display module via the SPI bus. The TFT LCD display module displays the fault code as text (such as "Input abnormal, please check the signal source") or code (such as "E01") to facilitate users to quickly identify and handle the problem.

[0128] As a further optional embodiment, the wireless projection device also includes a power supply module, the input of which is a TYPE C power supply interface, and the output of which is connected to a power management chip.

[0129] The power management chip is used to convert the external power supply voltage into different voltage levels suitable for the video processing module, the main control module, the display module, and the wireless transmission module.

[0130] The power supply module includes a TYPE C interface, which is used to connect an external power source (such as a 5V / 3A power adapter or a computer's USB-C power port) to power the wireless projection device.

[0131] The voltage output from the Type-C interface is directly input to the power management chip. The power management chip employs a highly integrated multi-channel voltage regulator, capable of converting a single external voltage input signal into multiple different voltage outputs, which are then supplied to:

[0132] Video processing module (e.g., 1.2V or 1.8V core voltage);

[0133] Main control module (e.g., 3.3V or 1.8V logic voltage);

[0134] Display module (e.g., backlight driving voltage 12V, LCD power supply 5V).

[0135] Wireless transmission module (e.g., 3.3V and 5V dual voltage power supply).

[0136] The power management chip integrates overvoltage, overcurrent, and short-circuit protection circuits to ensure safe and stable system operation. Simultaneously, the chip features power management capabilities, dynamically adjusting power supply based on the load of each module to improve overall energy efficiency and extend equipment lifespan.

[0137] In addition, the power management chip transmits the health status information of each voltage output to the main control module through power rail status feedback, which facilitates real-time monitoring of power supply status and fault warning.

[0138] To enable the identification and feedback of abnormal video input or network conditions, the main control module of this application includes not only a processing unit for video encoding, but also a built-in status detection circuit and fault code generation circuit. This circuit identifies and represents the fault status through hardware logic or hardware triggering.

[0139] Specifically, a signal validity detection circuit is installed in the connection line between the main control module and the video input module. This circuit can detect whether a valid TMDS (or DP / MIPI) signal waveform exists at the input terminal. When the detection time exceeds a set threshold (e.g., 500ms) and no valid signal is detected, the status judgment circuit inside the main control module generates a level signal, triggering the status code register or driving the logic gate array to output a specific combination of low / high level signals as a "fault indication code," which is then transmitted to the display module via the SPI bus, or triggering the LED module to light up the corresponding indicator light color (e.g., a flashing red light indicates an abnormal input signal).

[0140] Similarly, for the wireless transmission module, the main control chip reads the level of its connection status pin or network link detection pin to determine whether a valid WIFI link has been established (such as checking the indicator bit for whether the 802.11 connection handshake was successful). If the connection is not successfully established, the status detection circuit can also generate a "network abnormal" prompt code signal, which is then output to the display module or LED module by the hardware fault indication unit.

[0141] This implementation method simplifies and ensures the safety of device power supply by using a high-efficiency power management chip and a unified Type-C power supply interface, thereby improving the overall stability and reliability of the system.

[0142] As a further optional embodiment, the main control module is also connected to a fault status LED light assembly, which includes multi-color indicator lights. When the display module cannot work properly, the projection status information can be displayed through the LED colors.

[0143] In this wireless screen projection device, the main control module has multiple GPIO output pins to drive a fault status LED assembly. This LED assembly typically includes multi-color LEDs such as red, green, and blue, which use different colors and flashing patterns to indicate different operating states and fault types of the device.

[0144] When the display module fails to display the projection status information due to hardware failure, communication abnormality, or power failure, the main control module automatically activates the LED indicator mode to remind the user through the following example signal scheme:

[0145] Solid green light: The device is working properly and the screen mirroring connection is successful;

[0146] Green flashing: The device is initializing or waiting for a screen projection signal;

[0147] Solid red: Video input error, unable to receive valid signal;

[0148] Flashing red: Wireless network malfunction, transmission failed;

[0149] Solid blue light: System standby mode;

[0150] Alternating flashing of multiple colors: The device has experienced a serious malfunction and requires restarting or repair.

[0151] The main control module flexibly controls the lighting time, frequency, and color of the LED lights to provide intuitive prompts for various states. This allows users to quickly obtain information on the equipment's operating status and fault information even when the display module is unavailable, thus assisting in troubleshooting and maintenance.

[0152] This implementation significantly improves the device's fault indication function, enhances the user experience and operational efficiency of the product, and ensures that the wireless projection device can work stably and efficiently in various environments.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wireless screen projection device with a connection status feedback mechanism, characterized in that, include: Video input module, main control module, wireless transmission module, and display module; The video input module is used to receive video signals from the source device; The main control module is used to receive the video signal and encode the video data into video data in a preset format. The main control module is also used to determine the screen projection status information based on the working status of the video input module and the wireless transmission module; The wireless transmission module has its input end connected to the output end of the main control module, and is used to send the video data to the terminal to be projected. The display module has its input terminal connected to the output terminal of the main control module, and is used to display the projection status information.

2. The wireless screen projection device with a connection status feedback mechanism according to claim 1, characterized in that, The display module also includes a backlight control circuit, which includes a transistor, a current-limiting resistor, and a backlight power supply. The transistor is used to adjust the backlight brightness according to the PWM signal sent by the main control module; The main control module adjusts the brightness of the display module by changing the duty cycle of the PWM signal.

3. The wireless screen projection device with a connection status feedback mechanism according to claim 1, characterized in that, The wireless projection device also includes a linear motor module; The linear motor module has its input terminal connected to the PWM output pin of the main control module, and is used to adjust the vibration feedback intensity according to the PWM signal output by the main control module.

4. The wireless screen projection device with a connection status feedback mechanism according to claim 3, characterized in that, The wireless screen projection device also includes a button module; The button module includes at least one physical button switch, the two ends of which are respectively connected to the GPIO input pin of the main control module and the ground terminal. The button module also includes a capacitor element, which is connected in parallel with the physical button switch to form a physical debouncing circuit. The main control module determines the user operation based on the level change of the GPIO input pin and controls the display module or linear motor module to output corresponding feedback.

5. The wireless screen projection device with a connection status feedback mechanism according to claim 1, characterized in that, The wireless screen projection device also includes a video conversion circuit; The video conversion circuit includes a DP receiver chip and a MIPI output driver chip. The input terminal of the DP receiver chip is connected to the Type-C connector of the video input module. The output of the DP receiver chip is connected to the input of the MIPI output driver chip, and the output of the MIPI output driver chip is connected to the video input pin of the main control module.

6. The wireless screen projection device with a connection status feedback mechanism according to claim 1, characterized in that, The wireless transmission module includes a WIFI unit and a Bluetooth unit; The WIFI unit is used to wirelessly transmit compressed video data to a TV, conference tablet, or projector. The Bluetooth unit is used to assist in pairing and connection or to expand peripherals.

7. The wireless screen projection device with a connection status feedback mechanism according to claim 1, characterized in that, The display module is connected to the main control module via an SPI bus; the SPI bus includes MOSI, MISO, CLK and CS signal lines.

8. The wireless screen projection device with a connection status feedback mechanism according to claim 1, characterized in that, The main control module is also used to generate a fault code when the video input module does not receive a valid signal or the wireless transmission module has a network malfunction, and to visualize the fault code through the display module. The fault code corresponds to a specific error state.

9. The wireless screen projection device with a connection status feedback mechanism according to claim 1, characterized in that, The wireless projection device also includes a power supply module, whose input is a TYPE C power supply interface and whose output is connected to a power management chip. The power management chip is used to convert the external power supply voltage into different voltage levels suitable for the video processing module, the main control module, the display module, and the wireless transmission module.

10. The wireless screen projection device with a connection status feedback mechanism according to claim 1, characterized in that, The main control module is also connected to a fault status LED light assembly, which includes multi-color indicator lights. When the display module cannot work properly, the projection status information can be displayed through the LED colors.

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