| 摘要 |
A system includes a display, a video capturing device mounted on the display, and a brightness controller. The video capturing device captures N number of consecutive images during a time period. The brightness controller includes an object detecting unit for selecting one of the N number of images as a reference image and processing the other n-1 number of images relative to the reference image to detect any user of the display, a position determining unit for detecting a position of the user and determining any movement vector of the user of the N-1 images, a state determining unit for determining if the user is or is not using the display according to any movement vector of the user, and a brightness adjusting unit for adjusting a brightness of the display accordingly.
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