Abstract: A compact, high-speed, high resolution, low-cost color filter driver for use in a color optical reader. The image of a document is reflected through a cylindrical color filter assembly rotated by a motor, causing a charge coupled device to be exposed to the light three times (red, blue, green) as the motor was rotated through a half run, and the document scanning portion moves ahead for one step. The color image of the document is reproduced by repeating the aforesaid procedure again and again through the operation of the single color charge coupled device and the cylindrical color filter assembly.

Abstract: A scanning device for a color optical reader suitable for high speed single-pass scanning and size reduction, comprising a color charge-coupled-device (CCD) to sense and output red, green and blue signals; a driving circuitry to control the magnitude of the output image signals from the CCD; a color separation circuitry to select the desired color signal; a color pixel arrangement circuitry to convert the color data from a line sequence to a pixel sequence and a positioning mechanism to drive the CCD sensor to a predetermined position.The present invention can improve the effectiveness of single-pass scanning and output color signals while reducing the cost of the entire system.

Abstract: A durable filter driving mechanism for a color optical reader that is capable of being positively and accurately positioned is proposed. The filter driving mechanism includes a guiding piece mounting thereon a reduction gear assembly having a reduction gear set meshing with a rack of a sliding piece having a rail coupling thereto a color filter assembly operating in cooperation with a lens assembly and a charge coupled element.