One-way data sending device, one-way data receiving device and one-way data transmission system

Abstract

The utility model discloses a one-way data sending device, a one-way data receiving device and a one-way data transmission system. The one-way data sending device comprises a CPU, a network port, a prompt light sending module and a display screen, the prompt light sending module comprises a prompt lamp, the prompt light sending module is electrically connected with the display screen, the CPU is electrically connected with the display screen, and the network port is electrically connected with the CPU. The one-way data receiving device comprises a CPU, a network port, a prompt light receiving module and a camera, the prompt light receiving module is electrically connected with the camera, the CPU is electrically connected with the camera, and the network port is electrically connected with the CPU. According to the unidirectional data sending device and system provided by the utility model, the sending device can refresh the image without a response signal, and the receiving device can determine that the refreshing of the image is completed according to the prompt light without sending the response signal, so that the efficiency and the rate of unidirectional data transmission are improved, and unidirectional data transmission is realized.

Description

Technical Field

[0001] This utility model relates to the field of information transmission technology, and in particular to a one-way data sending device, a receiving device, and a one-way data transmission system. Background Technology

[0002] A camera-based one-way transmission system consists of two devices: a transmitter and a receiver. The transmitter displays a QR code, while the receiver's camera captures and decodes the QR code to achieve one-way data transmission.

[0003] However, current unidirectional transmission systems typically suffer from low unidirectional transmission rates. Utility Model Content

[0004] This invention provides a one-way data sending device, a receiving device, and a one-way data transmission system, which ensures one-way transmission and solves the problem of low one-way transmission rate.

[0005] A one-way data transmission device includes: a first CPU, a first network port, a prompt light transmission module, and a display screen. The prompt light transmission module includes a prompt light, and the prompt light transmission module and the display screen are electrically connected. The first CPU is electrically connected to the display screen. The first network port is electrically connected to the first CPU. The first CPU is configured to receive a target data signal through the first network port, convert the target data signal into a target image signal, and then send the target image signal to the display screen. The display screen is configured to display a target image after receiving the target image signal, and generate a vertical synchronization signal after the target image is refreshed. The prompt light transmission module is configured to illuminate the prompt light after detecting the vertical synchronization signal, wherein the prompt light is used to prompt the one-way data receiving device to recognize the target image.

[0006] Furthermore, the indicator light transmitting module includes an infrared transmitting module, and the indicator light includes an infrared light.

[0007] Furthermore, the interface through which the first CPU is electrically connected to the display screen includes an RGB interface.

[0008] Furthermore, the level of the vertical synchronization signal before the target image refresh is completed is higher than that after the refresh is completed.

[0009] A one-way data receiving device includes: a second CPU, a second network port, a prompt light receiving module, and a camera. The prompt light receiving module and the camera are electrically connected; the second CPU is electrically connected to the camera; the second network port is electrically connected to the second CPU; the prompt light receiving module is used to send a trigger signal to the camera after recognizing a prompt light emitted by the one-way data transmitting device; the camera is used to recognize a target image displayed by the one-way data transmitting device after receiving the trigger signal, and send the recognized target image signal to the second CPU; the second CPU is used to convert the target image signal into a target data signal and send the target data signal through the second network port.

[0010] Furthermore, the prompt light receiving module is specifically used to send a trigger signal to the external trigger pin built into the camera after recognizing the prompt light emitted by the one-way data transmitting device.

[0011] Furthermore, the camera is specifically used to trigger a global exposure to capture the target image displayed by the one-way data transmission device after receiving the trigger signal on the built-in external trigger pin.

[0012] Furthermore, the trigger signal is a rising edge signal.

[0013] Furthermore, when the indicator light emitted by the one-way data transmitting device is an infrared light, the indicator light receiving module is an infrared receiving module.

[0014] A one-way data transmission system includes: a one-way data transmitting device and a one-way data receiving device; wherein, the one-way data transmitting device is the one-way data transmitting device described above, and the one-way data receiving device is the one-way data receiving device described above.

[0015] The one-way data transmitting device provided by this utility model can generate a vertical synchronization signal after the image refresh is completed. This signal illuminates an indicator light, prompting the one-way data receiving device to recognize the target image. The image can be refreshed without waiting for a response signal from the receiving device, improving the efficiency and speed of one-way data transmission. The one-way data receiving device provided by this utility model can send a trigger signal to its built-in camera after recognizing the indicator light emitted by the one-way data transmitting device. This allows the camera to recognize the target image displayed by the one-way data transmitting device, thereby obtaining the target data. No response signal needs to be sent to the transmitting device; the completion of image refresh can be determined solely by the indicator light emitted by the transmitting device, further improving the efficiency and speed of one-way data transmission. The one-way data transmission system provided by this utility model uses a trigger signal to control the receiving camera to recognize the image after each frame of the display screen is completed, improving the efficiency and speed of one-way data transmission and achieving one-way data transmission. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a one-way data transmission device provided in one embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a one-way data receiving device provided in three embodiments of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of a one-way data transmission system provided in five embodiments of this utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] Unidirectional transmission systems typically suffer from various problems. For example:

[0022] Problem 1) The incomplete display of the camera's captured image, resulting in data loss during transmission, typically occurs in one-way transmission systems equipped with progressive scan displays or rolling shutter exposure cameras.

[0023] Question 2) The camera captures images with water ripples, making it impossible to accurately recognize QR code images and resulting in data loss. Although the water ripples can be minimized by adjusting the exposure time and frame rate, if you want to use the camera to recognize QR codes for large-scale data transmission, the QR code images will be very detailed and dense, and the water ripples will make it difficult to recognize the QR codes.

[0024] Problem 3) Enabling the camera's flicker avoidance function causes frame drops and data loss. While enabling the flicker avoidance function solves problems 1) and 2), this function sacrifices the frame rate of the video captured by the camera. Unstable frame rate changes directly reduce the amount of QR code data that can be recognized per second.

[0025] These issues can lead to problems such as irregular data loss at the sending end, with the receiving end unaware of the loss. Current solutions involve the receiving end sending an acknowledgment signal to the sending end upon receiving data, and the sending end only continuing to send the next data packet after receiving the acknowledgment signal. However, this existing solution reduces the one-way transmission rate and does not provide unidirectional data transmission or physical isolation.

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] Figure 1 This is a schematic diagram of the structure of a one-way data transmission device provided in one embodiment of this utility model.

[0029] like Figure 1 As shown, this transmitting device includes: CPU 101, network port 102, prompt light transmitting module 103 and display screen 104. The prompt light transmitting module 103 includes a prompt light, and the prompt light transmitting module 103 and display screen 104 are electrically connected; CPU 101 is electrically connected to display screen 104; and network port 102 is electrically connected to CPU 101.

[0030] The CPU 101 is used to receive target data signals through network port 102, convert the target data signals into target image signals, and then send the target image signals to display screen 104; display screen 104 is used to display the target image after receiving the target image signal, and generate a vertical synchronization signal after the target image is refreshed; the prompt light sending module 103 is used to light up the prompt light after detecting the vertical synchronization signal, wherein the prompt light is used to prompt the one-way data receiving device to identify the target image.

[0031] Specifically, the network port of a unidirectional data transmission device can connect to a device that needs to send data unidirectionally. After the CPU obtains the data to be transmitted through the network port, it can generate an image signal, such as a QR code image signal, which the display screen can then use to display the image. The display screen can generate a VSYNC (Vertical Synchronization) signal. The VSYNC signal is mainly used to coordinate the frame refresh process between the video source (such as the computer's graphics processing unit GPU) and the display device (such as a monitor) to ensure that the image is displayed stably without tearing or stuttering.

[0032] After the display screen completes refreshing a frame of image, the generated VSYNC signal triggers the indicator light transmission module to illuminate the indicator light. The light from this indicator light prompts the receiving device to identify the target image on the display screen. The time for the one-way data receiving device to identify the image is shorter than the time it takes for the display screen to refresh the image.

[0033] The one-way data transmitting device provided in Embodiment 1 of this utility model can generate a vertical synchronization signal after the image is refreshed, and illuminate an indicator light through this signal, thereby prompting the one-way data receiving device to identify the target image. This device can refresh the image without waiting for a response signal from the receiving device, improving the efficiency and speed of one-way data transmission and realizing one-way data transmission.

[0034] Example 2

[0035] The unidirectional data transmission device of this embodiment is based on the first embodiment and further includes:

[0036] Optionally, the indicator light transmitting module includes an infrared transmitting module, and the indicator light includes an infrared light.

[0037] Optionally, the interface for the first CPU to electrically connect to the display includes an RGB interface.

[0038] Optionally, the level of the vertical synchronization signal before the target image is refreshed is higher than the level of the vertical synchronization signal after the refresh is completed.

[0039] Specifically, when the infrared transmitting module detects that the VSNYC signal has gone low, it will instantly illuminate the infrared LED to emit an infrared signal. When the next frame of the display refreshes, the VSNYC signal will go high. After the infrared transmitting module detects that the VSNYC signal has gone high, it will turn off the infrared LED and continue to monitor whether the VSNYC signal will go low, i.e., it will monitor for the next low VSNYC signal. The indicator light can be a visible light and / or an invisible light, such as at least one of ultraviolet light, laser light, and infrared light.

[0040] For example, the one-way data transmission device in this embodiment has a faster data transmission rate. If a 16:9 general 720P display screen is used and the display screen refresh rate is set to 60MHz, a single frame can transmit 2KB of QR code, and the real-time transmission rate can reach 0.96Mbit / s.

[0041] The one-way data transmission device provided in Embodiment 2 of this utility model can light up an infrared lamp after detecting the falling edge of the VSYNC signal level of the display screen, so that the receiving device can receive the lamp signal in time and recognize the image in time, thereby improving the efficiency and speed of one-way data transmission and realizing one-way data transmission.

[0042] Example 3

[0043] Figure 2 This is a schematic diagram of the structure of a one-way data receiving device provided in three embodiments of this utility model.

[0044] like Figure 2 As shown, this receiving device includes: CPU 201, network port 202, prompt light receiving module 203 and camera 204. The prompt light receiving module 203 and camera are electrically connected; CPU 201 is electrically connected to camera; network port 202 is electrically connected to CPU 201.

[0045] The prompt light receiving module 203 is used to send a trigger signal to the camera 204 after recognizing the prompt light emitted by the one-way data transmitting device; the camera 204 is used to recognize the target image displayed by the one-way data transmitting device after receiving the trigger signal, and send the recognized target image signal to the CPU 201; the CPU 201 is used to convert the target image signal into a target data signal and send the target data signal through the network port 202.

[0046] Specifically, after the one-way data receiving device completes power-on initialization and camera setup, it can wait for the indicator light receiving module to send a trigger signal. When the indicator light receiving module detects the indicator light emitted by the one-way data transmitting device, it instantly outputs a signal, which is the trigger signal. Upon receiving this trigger signal, the camera immediately captures the (target) image displayed on the transmitting device, such as a QR code image. After capturing the image, the target image signal can be sent to the CPU via the MIPI-CSI interface. The CPU can decode this target image signal into a data signal and transmit it via the network port to the device that needs to receive the one-way data. The MIPI-CSI interface is a specific interface standard used to connect the camera sensor and the processor.

[0047] The one-way data receiving device provided in Embodiment 3 of this utility model can send a trigger signal to the built-in camera after recognizing the indicator light emitted by the one-way data transmitting device, so that the camera can recognize the target image displayed by the one-way data transmitting device and thus obtain the target data. This device does not need to send a response signal to the transmitting device; it can determine that the image refresh is complete based on the indicator light emitted by the transmitting device, thereby improving the efficiency and rate of one-way data transmission and realizing one-way data transmission.

[0048] Example 4

[0049] The unidirectional data receiving device in this embodiment is based on the third embodiment and further includes:

[0050] Optionally, a prompt light receiving module is used to send a trigger signal to the external trigger pin built into the camera after recognizing the prompt light emitted by the one-way data transmitting device.

[0051] Optionally, the camera is specifically used to trigger a global exposure to capture the target image displayed by the unidirectional data transmission device after receiving a trigger signal on the built-in external trigger pin.

[0052] Optionally, the trigger signal is a rising edge signal.

[0053] Optionally, when the indicator light emitted by the one-way data transmitting device is an infrared light, the indicator light receiving module is an infrared receiving module.

[0054] Specifically, when the one-way data receiving device powers on and initializes, the camera is set to externally triggered global exposure mode and waits for a trigger signal from the infrared receiving module. When the infrared receiving module receives infrared light, it instantly outputs a rising edge signal, which is the trigger signal. Once the trigger signal is output to the camera's external trigger pin, the camera immediately begins global exposure to capture the image displayed on the transmitting device. After the exposure is complete, the image signal can be sent to the CPU via the MIPI-CSI interface.

[0055] The one-way data receiving device provided in Embodiment 4 of this utility model can ensure a stable one-way data transmission rate. By using a globally exposed camera, it can complete the image acquisition before the next frame of the transmitting device is refreshed, ensuring that no data is lost per frame. This improves the efficiency and rate of one-way data transmission and realizes one-way data transmission.

[0056] Example 5

[0057] The one-way data transmission system provided in this embodiment includes the one-way data sending device and one-way data receiving device provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0058] Figure 3This is a schematic diagram of a one-way data transmission system provided in five embodiments of this utility model.

[0059] like Figure 3 As shown, this system includes a one-way data transmitting device 300 and a one-way data receiving device 400. The one-way data transmitting device 300 includes a CPU 301, a network port 302, a notification light transmitting module 303, and a display screen 304. The notification light transmitting module 303 includes a notification light, and the notification light transmitting module 303 and the display screen 304 are electrically connected; the CPU 301 is electrically connected to the display screen 304; and the network port 302 is electrically connected to the CPU 301. The one-way data receiving device 400 includes a CPU 401, a network port 402, a notification light receiving module 403, and a camera 404. The notification light receiving module 403 and the camera are electrically connected; the CPU 401 is electrically connected to the camera; and the network port 402 is electrically connected to the CPU 401.

[0060] Specifically, the unidirectional data transmitting device in this embodiment is the unidirectional data transmitting device of Embodiment 1 or 2 described above. The unidirectional data receiving device in this embodiment is the unidirectional data transmitting device of Embodiment 3 or 4 described above. In this embodiment, the transmitting end only transmits optical signals, and the receiving end only receives optical signals, achieving physically isolated unidirectional transmission. Here, using optical signals for data transmission and achieving physical isolation (also known as optical isolation) mainly refers to using light to transmit information through media such as optical fibers, thereby providing electrical isolation between the transmitting end and the receiving end.

[0061] The one-way data transmission system provided in Embodiment 5 of this utility model realizes that after each frame of image is displayed on the screen at the sending end, a trigger signal is generated to control the camera at the receiving end to recognize the image, ensuring stable one-way data transmission rate and no loss of each frame of data, thereby improving the efficiency and rate of one-way data transmission and realizing one-way data transmission.

Claims

1. A one-way data transmission device, characterized in that, include: The system comprises a first CPU, a first network port, a prompt light transmitting module, and a display screen. The prompt light transmitting module includes a prompt light, and the prompt light transmitting module and the display screen are electrically connected. The first CPU is electrically connected to the display screen; the first network port is electrically connected to the first CPU; The first CPU is configured to receive target data signals through the first network port, convert the target data signals into target image signals, and then send the target image signals to the display screen. The display screen is used to display the target image after receiving the target image signal, and to generate a vertical synchronization signal after the target image is refreshed; The indicator light transmitting module is used to illuminate the indicator light after detecting the vertical synchronization signal, wherein the indicator light is used to prompt the one-way data receiving device to identify the target image.

2. The device according to claim 1, characterized in that, The indicator light transmitting module includes an infrared transmitting module, and the indicator light includes an infrared light.

3. The device according to claim 1 or 2, characterized in that, The interface through which the first CPU is electrically connected to the display screen includes an RGB interface.

4. The device according to claim 1, characterized in that, The level of the vertical synchronization signal before the target image is refreshed is higher than that after the refresh is completed.

5. A one-way data receiving device, characterized in that, include: The system comprises a second CPU, a second network port, a prompt light receiving module, and a camera, wherein the prompt light receiving module and the camera are electrically connected. The second CPU is electrically connected to the camera; The second network port is electrically connected to the second CPU; The prompt light receiving module is used to send a trigger signal to the camera after recognizing the prompt light emitted by the one-way data transmitting device; The camera is used to identify the target image displayed by the one-way data transmission device after receiving the trigger signal, and send the identified target image signal to the second CPU; The second CPU is used to convert the target image signal into a target data signal and send the target data signal through the second network port.

6. The device according to claim 5, characterized in that, The prompt light receiving module is specifically used to send a trigger signal to the external trigger pin built into the camera after recognizing the prompt light emitted by the one-way data transmitting device.

7. The device according to claim 5 or 6, characterized in that, Specifically, the camera is used to trigger a global exposure to capture the target image displayed by the one-way data transmission device after receiving the trigger signal on the built-in external trigger pin.

8. The device according to claim 5, characterized in that, The trigger signal is a rising edge signal.

9. The device according to claim 5 or 8, characterized in that, When the indicator light emitted by the one-way data transmitting device is an infrared light, the indicator light receiving module is an infrared receiving module.

10. A one-way data transmission system, characterized in that, Includes: one-way data transmitting devices and one-way data receiving devices; Wherein, the one-way data transmitting device is the one-way data transmitting device according to any one of claims 1-4, and the one-way data receiving device is the one-way data receiving device according to any one of claims 5-9.

Images