Wireless camera mouse laser pointer system and structure？
Large screen projection displays are increasingly used for e-learning, lectures, demonstrations and presentations. In order for the speaker to better explain the presentation, he usually needs to stand near the screen and point out key parts of the presentation on the screen with the laser pointer to increase the audience's attention. However, the existing laser pointer usually only laser, page turning and other functions, can not effectively achieve mouse operation. When mouse operation is required, the speaker needs to return to the computer for corresponding operation, which is not only easy to interrupt the speaker's thoughts, but also affect the audience's interest; It has been proposed that cameras be attached to projectors, resulting in increased requirements for projectors and a significant reduction in the availability of laser Pointers for lecture halls where electronic screens do not require projectors.
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Light Source
Structure:
Integrated camera high powered laser pointer includes laser transmitter, RF transmitter, receiver (USB interface), camera, central processing unit (CPU), clock element and key; The laser transmitter is used to generate laser pulses of a specific frequency (>60HZ); Rf transmitter is used to send mouse operation and mouse position information to the operating system, receiver (USB interface) is used to receive mouse operation and mouse position information; The camera samples the target asynchronously with the sampling frequency of laser transmitter. The central processing unit is used to process the images captured by the camera and perform denoising and distortion correction to obtain the difference between the projection screen and the operating system screen. The correspondence between clock elements; The clock element is used for timing, marking the time of pressing the button, and the central processing unit selects the image frame to be processed according to the time recorded by the clock element. The button includes the laser on key to control the laser emitter and the mouse control key to generate the left mouse button and right mouse button.
2021-11-11 08:26:41
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