Patent ID: 8300283
Filing Date: 2012-10-30
Classification: H04N

Abstract:
1. A scanning system having a brightness compensation mechanism for scanning a plurality of pages, the scanning system comprising: a light source, for generating a brightness to illuminate the pages; an image sensor, for sensing image data shown on the pages in order to output analog signal data corresponding to the image data; an analog-front-end coupled to the image sensor, for converting the analog signal data into digital signal data; a brightness compensation apparatus coupled to the analog-front-end, the brightness compensation apparatus comprising: a second voltage control circuit coupled to the first voltage control circuit, for outputting a direct-current (DC) voltage; and an inverter coupled to the second voltage control circuit, for receiving the DC voltage and outputting an alternating current (AC) voltage with high level in order to control the brightness by at least one level of the DC voltage.