Ultrasonic induction computer automatic screen locking system

Abstract

The utility model discloses an ultrasonic induction computer automatic screen locking system which comprises a processor, an ultrasonic transmitting module, an ultrasonic receiving module and a picture detection module. The corresponding end of the processor is electrically connected with the corresponding ends of an ultrasonic transmitting module, an ultrasonic receiving module and a picture detection module. The ultrasonic transmitting module is used for transmitting an ultrasonic signal; the ultrasonic receiving module is used for receiving the ultrasonic signal reflected by the human body; the processor is used for judging whether a user is in front of a computer or not according to the reflected ultrasonic signal received by the ultrasonic receiving module and controlling screen locking; the picture detection module is used for dynamically detecting whether a computer screen picture changes or not, and the processor controls screen locking according to the picture change condition. Through the ultrasonic induction technology, whether a user is in front of the computer or not can be automatically judged, when it is detected that the user leaves the computer, the processor controls the computer to automatically lock the screen, and the use safety of the computer is improved.

Description

Technical Field

[0001] This utility model relates to the field of computer automatic screen locking technology, and in particular to an ultrasonic sensing computer automatic screen locking system. Background Technology

[0002] In modern office and personal environments, computers have become indispensable tools. To protect user privacy and data security, most computers are equipped with automatic screen locking functionality to prevent unauthorized access when the user is away. However, existing automatic screen locking technologies mainly rely on preset waiting times or physical triggers, and these methods have certain limitations:

[0003] Time-dependent: Time-based screen lock technology cannot determine whether the user has actually left, which may result in the screen being locked while the user is still using the computer, or the screen remaining unlocked for an extended period after the user has left.

[0004] Physical trigger limitations: Technologies that rely on physical buttons or other triggering mechanisms may not be sensitive enough or prone to accidental operation, and cannot cover all situations where the user is not in front of the computer.

[0005] Lack of intelligent detection: Existing technologies fail to effectively utilize intelligent detection methods to determine whether a user has actually left the computer, often resulting in unnecessary screen locking or delayed screen locking, which affects the user experience.

[0006] Balancing security and convenience: While improving security, existing technologies often sacrifice convenience, requiring users to frequently unlock the screen, which is particularly inconvenient in multitasking and fast-paced work environments. Utility Model Content

[0007] To address the problems existing in the prior art, this utility model provides an ultrasonic sensing computer automatic screen locking system.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows:

[0009] This utility model provides an ultrasonic sensing computer automatic screen locking system, including: a processor, an ultrasonic transmitting module, an ultrasonic receiving module, and a screen detection module;

[0010] The corresponding terminals of the processor are electrically connected to the corresponding terminals of the ultrasonic transmitting module, the ultrasonic receiving module, and the image detection module, respectively.

[0011] The ultrasonic transmitting module is used to transmit ultrasonic signals;

[0012] The ultrasonic receiving module is used to receive ultrasonic signals reflected by the human body;

[0013] The processor is used to determine whether the user is in front of the computer based on the reflected ultrasonic signal received by the ultrasonic receiving module, and to control the screen lock.

[0014] The screen detection module is used to dynamically detect whether there are changes in the computer screen image, and the processor controls the screen to lock based on the screen changes.

[0015] Preferably, the computer further includes a screen and a keyboard, the ultrasonic receiving module is disposed at the keyboard, and the ultrasonic transmitting module is disposed at the screen; the corresponding terminals of the processor are electrically connected to the corresponding terminals of the screen and the keyboard, respectively.

[0016] Preferably, the ultrasonic transmitting module is configured as an ultrasonic speaker.

[0017] Preferably, the ultrasonic receiving module is configured as a microphone capable of receiving ultrasonic waves.

[0018] Preferably, the computer automatic screen locking system further includes a face recognition module.

[0019] The face recognition module is mounted on the screen, and the ultrasonic transmitting module is located on both sides of the face recognition module; the corresponding end of the face recognition module is electrically connected to the corresponding end of the processor.

[0020] Preferably, the face recognition module includes

[0021] A camera used to capture images of the user's face;

[0022] Infrared sensors are used to assist cameras in capturing clearer facial images under different lighting conditions;

[0023] The corresponding ends of the camera and infrared sensor are electrically connected to the corresponding ends of the processor to achieve facial feature extraction and identity verification.

[0024] Preferably, the screen detection module includes an image processing unit for analyzing dynamic changes in the screen image and sending the screen change information to the processor.

[0025] Preferably, the ultrasonic horn emits ultrasonic waves intermittently or continuously, with the intermittent duration being 10 to 30 seconds.

[0026] Preferably, the distance at which the microphone receives the ultrasonic signal reflected from the human body does not exceed 50cm.

[0027] Preferably, the ultrasonic receiving module is located in the middle of the bottom side of the keyboard, and the ultrasonic transmitting module is located in the middle of the top side of the screen.

[0028] The technical solution of this utility model has the following beneficial effects:

[0029] Automatic screen lock function: Through ultrasonic sensing technology, it can automatically determine whether the user is in front of the computer. When the processor detects that the user has left the computer, it controls the computer to automatically lock the screen, which improves the security of computer use and prevents unauthorized access and data leakage. Since the system only activates screen lock when it detects that the user is not in front of the computer, it avoids frequent manual screen lock operations, thereby saving power consumption and extending the life of the computer.

[0030] Improve work efficiency: The system dynamically monitors screen changes through the screen detection module. Even when the user is not in front of the computer, if the screen is still changing (such as playing a video or conducting a test), the system will not lock the screen, thus not interrupting the work in progress and improving work efficiency.

[0031] Enhanced security: The face recognition module provides an additional security verification layer, ensuring that only authorized users can unlock the computer, thus enhancing data protection and privacy; the infrared sensor in the face recognition module assists the camera in capturing clear facial images under different lighting conditions, ensuring accurate face recognition in various ambient light environments.

[0032] Precise human detection: The ultrasonic transmitting module emits ultrasonic signals, and the ultrasonic receiving module receives the signals reflected by the human body. The processor uses these signals to accurately determine whether the user is in front of the computer. Compared with traditional screen lock technologies based on time or physical buttons, it provides more accurate and reliable human detection.

[0033] Cost reduction: The system uses the computer's built-in speaker and microphone as ultrasonic transmitting and receiving modules, eliminating the need for an additional ultrasonic detection module, thus reducing manufacturing and maintenance costs, while improving compatibility with existing computer hardware.

[0034] Rapid response: The processor responds quickly to signals from the ultrasonic receiving module and the image detection module, locking or unlocking the screen in a timely manner, thus improving the system's response speed. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the control module of this utility model;

[0036] Figure 2 This is a control diagram of the processor, ultrasonic speaker, and microphone of this utility model;

[0037] Figure 3 This is a schematic diagram of the installation of the ultrasonic speaker and microphone of this utility model; Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] Reference Figures 1 to 3This utility model provides an ultrasonic sensing computer automatic screen locking system, including: a processor 100, an ultrasonic transmitting module, an ultrasonic receiving module, and a screen detection module 400.

[0044] The corresponding terminals of the processor 100 are electrically connected to the corresponding terminals of the ultrasonic transmitting module, the ultrasonic receiving module, and the image detection module 400, respectively.

[0045] An ultrasonic transmitting module is used to transmit ultrasonic signals;

[0046] An ultrasonic receiver module is used to receive ultrasonic signals reflected by the human body.

[0047] The processor 100 is used to determine whether the user is in front of the computer based on the reflected ultrasonic signal received by the ultrasonic receiver module, and to control the screen lock.

[0048] The screen detection module 400 is used to dynamically detect whether there are changes in the computer screen. The processor controls the screen to lock based on the screen changes. The system dynamically monitors screen changes through the screen detection module 400. Even when the user is not in front of the computer, if the screen is still changing (such as playing a video or conducting a test), the system will not lock the screen, thus not interrupting the work in progress and improving work efficiency.

[0049] Specifically, the computer's automatic screen locking system also includes a screen 600 and a keyboard 700. An ultrasonic receiver module is located at the keyboard 700, and an ultrasonic transmitter module is located at the screen 600. Figure 3 For example, in a laptop computer, the ultrasonic receiver module is located in the center of the bottom side of the keyboard 700, and the ultrasonic transmitter module is located in the center of the top side of the screen 600. The positions of the ultrasonic receiver and transmitter modules are not limited; they can be reversed, or both can be located on the screen or keyboard. Their specific distribution is also unrestricted, as long as they can receive reflected signals, ensuring the system can accurately detect the user's presence during normal computer use. The processor is electrically connected to the corresponding terminals of the screen and keyboard. The processor controls the ultrasonic transmitter module on the screen 600 to emit ultrasonic waves, which are then transmitted back to the ultrasonic receiver module on the keyboard 700, controlling the screen lock.

[0050] Furthermore, the ultrasonic transmitting module is configured as an ultrasonic speaker 200. Laptops typically have one or more speakers. One of these speakers is connected to and controlled by the processor. This speaker can emit ultrasonic waves. If there are multiple speakers, one speaker emits ultrasonic waves while the others emit normal sound waves. Alternatively, if there is only one speaker, it can emit both normal sound waves and ultrasonic waves. The speaker has two channels: one channel emits ultrasonic waves at a frequency greater than 20kHz, and the other channel emits normal frequency sound waves. Using the laptop's built-in speaker for ultrasonic detection eliminates the need for a separate ultrasonic module, making it more convenient and simple. The ultrasonic speaker emits ultrasonic waves intermittently or continuously, with the intermittent interval ranging from 10 to 30 seconds. This intermittent emission reduces energy consumption while maintaining real-time monitoring of the human body, achieving a balance between energy saving and efficiency. Furthermore, the ultrasonic receiving module is configured as a microphone 300 capable of receiving ultrasonic waves. After the ultrasonic waves are emitted, they are reflected by the user's body and received by the microphone 300. This microphone 300 has a module for receiving ultrasonic waves, which can identify sound waves within the ultrasonic frequency range and filter sound waves outside the frequency range, such as sound waves with frequencies less than 20KHz. If an ultrasonic frequency is detected, the screen lock control module in the processor will not be activated. If no ultrasonic frequency is detected, the screen lock will be activated, controlling the computer screen to lock. The ultrasonic waves are received by the computer's built-in microphone, eliminating the need for an additional detection module and simplifying the system. The microphone receives the ultrasonic signals reflected by the human body at a distance of no more than 50cm, allowing the system to focus on the presence of a human body within the computer's operating area, reducing the possibility of misjudgment, and avoiding interference with reflections from irrelevant human bodies far from the computer, thus enabling a more accurate determination of whether the user is in front of the computer.

[0051] Furthermore, the automatic screen locking system also includes a face recognition module 500, which is mounted on the screen 600. Ultrasonic emission modules are located on either side of the face recognition module 500. This layout ensures that the user's face is naturally within the field of view of the camera and infrared sensor when using the computer, facilitating rapid facial image capture. The face recognition module 500 is electrically connected to the processor 100. The face recognition module 500 can quickly identify the user and unlock the screen, providing a convenient passwordless login experience. The face recognition module 500 includes a camera for capturing the user's facial image and an infrared sensor to assist the camera in capturing clearer facial images under different lighting conditions. The camera and infrared sensor are electrically connected to the processor 100 to extract facial features and verify identity. When a human user appears within the detection range of the face recognition module 500, the screen 600 is activated, and the camera is also activated for face recognition. After successful matching, the screen is unlocked. The user can quickly unlock the computer without manually entering a password or using a physical key, greatly improving the user experience.

[0052] Furthermore, the screen detection module 400 includes an image processing unit for analyzing dynamic changes in the screen image and sending the changes to the processor. This function enables the system to distinguish between the static display of the screen when the user is away and dynamic changes during operation, such as video playback or software testing. The image processing unit sends the changes to the processor, which intelligently determines whether to lock the screen based on this information. For example, if the screen is constantly changing, it indicates that the computer may be playing a video or running a program that requires continuous display. In this case, the system will not lock the screen to avoid interfering with normal computer use. By intelligently recognizing dynamic changes in the screen image, the system allows the screen not to be locked when the user is briefly away, thus not interrupting ongoing work, such as video conferencing, presentations, or long-running computing tasks, thereby improving work efficiency.

[0053] The working principle of this utility model is as follows:

[0054] Ultrasonic signal transmission: The ultrasonic transmission module (ultrasonic speaker) configured in the system periodically transmits ultrasonic signals to the area in front of the computer screen.

[0055] Ultrasonic signal reception and processing: The ultrasonic receiving module (a microphone capable of receiving ultrasonic waves) is used to receive ultrasonic signals reflected back from the human body; the received reflected ultrasonic signals are sent to the processor 100, which determines whether the user is in front of the computer based on the presence or absence of the signal; if the processor 100 does not detect reflected ultrasonic signals for a period of time, it assumes that the user has left the computer, thereby triggering the screen lock mechanism to automatically lock the computer screen to protect user privacy and data security; if reflected ultrasonic signals are detected, it indicates that the user is still in front of the computer, and the processor 100 will keep the screen unlocked.

[0056] Dynamic screen detection: The image processing unit analyzes the dynamic changes of the screen and sends the analysis results to the processor 100; the processor 100 intelligently determines whether the screen needs to be locked based on the screen changes, so as to avoid erroneously locking the screen when the screen is dynamically changing, such as when playing videos or conducting tests.

[0057] The face recognition module 500 is used for facial recognition. When the ultrasonic wave detects the presence of a human body and the screen detection module 400 detects that the screen is awake, the face recognition module 500 is activated to perform face recognition. Once the face recognition is successful, the processor 100 will unlock the screen and allow the user to continue using the computer.

[0058] The processor 100, as the core of the system, coordinates the work of the ultrasonic transmitting module, ultrasonic receiving module, image detection module 400, and face recognition module 500 to ensure the efficient and accurate operation of the entire lock screen system.

[0059] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An ultrasonic sensing computer automatic screen locking system, characterized in that, include: Processor, ultrasonic transmitting module, ultrasonic receiving module, image detection module; The corresponding terminals of the processor are electrically connected to the corresponding terminals of the ultrasonic transmitting module, the ultrasonic receiving module, and the image detection module, respectively. The ultrasonic transmitting module is used to transmit ultrasonic signals; The ultrasonic receiving module is used to receive ultrasonic signals reflected by the human body; The processor is used to determine whether the user is in front of the computer based on the reflected ultrasonic signal received by the ultrasonic receiving module, and to control the screen lock. The screen detection module is used to dynamically detect whether there are changes in the computer screen image, and the processor controls the screen to lock based on the screen changes.

2. The ultrasonic sensing automatic computer screen locking system according to claim 1, characterized in that, The computer automatic screen locking system also includes a screen and a keyboard. The ultrasonic receiving module is located at the keyboard, and the ultrasonic transmitting module is located at the screen. The corresponding terminals of the processor are electrically connected to the corresponding terminals of the screen and the keyboard, respectively.

3. The ultrasonic sensing automatic computer screen locking system according to claim 2, characterized in that, The ultrasonic transmitting module is configured as an ultrasonic speaker.

4. The ultrasonic sensing automatic computer screen locking system according to claim 2, characterized in that, The ultrasonic receiving module is configured as a microphone capable of receiving ultrasonic waves.

5. The ultrasonic sensing automatic computer screen locking system according to claim 3, characterized in that, The computer's automatic screen locking system also includes a facial recognition module. The face recognition module is mounted on the screen, and the ultrasonic transmitting module is located on both sides of the face recognition module; the corresponding end of the face recognition module is electrically connected to the corresponding end of the processor.

6. The ultrasonic sensing automatic computer screen locking system according to claim 5, characterized in that, The face recognition module includes: A camera used to capture images of the user's face; Infrared sensors are used to assist cameras in capturing clearer facial images under different lighting conditions; The corresponding ends of the camera and infrared sensor are electrically connected to the corresponding ends of the processor to achieve facial feature extraction and identity verification.

7. The ultrasonic sensing automatic computer screen locking system according to claim 6, characterized in that, The screen detection module includes an image processing unit, which analyzes the dynamic changes in the screen image and sends the image changes to the processor.

8. The ultrasonic sensing automatic computer screen locking system according to claim 3, characterized in that, The ultrasonic horn emits ultrasonic waves intermittently or continuously, with the intermittent duration ranging from 10 to 30 seconds.

9. The ultrasonic sensing automatic computer screen locking system according to claim 4, characterized in that, The microphone receives ultrasonic signals reflected from the human body at a distance not exceeding 50cm.

10. The ultrasonic sensing automatic computer screen locking system according to claim 2, characterized in that, The ultrasonic receiving module is located in the middle of the bottom side of the keyboard, and the ultrasonic transmitting module is located in the middle of the top side of the screen.

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