Computer camera black screen reasons may be: camera function is not turned on, computer driver problems, camera malfunction, the camera is blocked, etc..
Camera function is not turned on: find the computer's camera switch, to confirm that it is turned on. The computer's driver problem: In the case of determining that it is not a damaged camera, it may be the computer's driver problem that causes it not to be used.
Camera malfunction: It is also possible that the camera itself is malfunctioning, then naturally the camera cannot be used. Camera is obscured: if the camera is stuck with stains, resulting in obscuration, then the black screen will appear.
Working Principle of Camera
Camera (CAMERA or WEBCAM), also known as computer camera, computer eye, electronic eye, etc., is a kind of video input device, which is widely used in video conferencing, telemedicine and real-time monitoring. Ordinary people can also talk and communicate with each other over the network with images and sound through cameras. In addition, it can also be used for a variety of popular digital imaging, audio and video processing.
The working principle of the camera is roughly as follows: the scene through the lens (LENS) generated by the optical image projected onto the surface of the image sensor, and then converted into electrical signals, after the A/D (analog-to-digital) conversion into digital image signals, and then sent to the digital signal processing chip (DSP) processing, and then through the USB interface to the computer processing, through the monitor you can see the The image can be seen on the monitor.