GL646USB datasheet(15/43 Pages) ETC

15 / 43 page

Revision 1.3

Mar.22 2001

-14-

GL646USB

LED R/G/B

true gray scan:

LED R

LED G

LED B

6.6. Image Sensor Timing

Can be programmed.

A. CCD : support 600,1200 or 2400 dpi CCD.

For example NEC, TOSHIBA, Sony ……etc.

B. CIS : support 600,1200 or 2400 dpi CIS.

For example Canon , Toshiba , Mitsubishi ……etc.

6.7. Dummy Line

Support programmable dummy lines to resolve (overcome) Start/Stop problem.

You can insert dummy lines to reduce scanner stop and wait events (buffer full) or always no-stop.

A. Line base of dummy lines:

The range of dummy lines is 0 line ~ 15 lines.

B. Adjustable dummy line:

The range is CCD or CIS minimum shift out time to 512k pixels time, can be adjusted by 1 pixel time increment.

6.8. Analog Front End Timing :

Internal 16 bits Front-End : Operation is similar to Wolfson or Analog Device.

6.9. Image Type

Support color, fine gray, fast gray and fast Black & White scan.

Support color filters selection for gray and B/W scan. The filters include Red, Green and Blue.

Note: The scan style of fine gray and color is same. So, fine gray scanning speed is slow.

The exposure time of fast gray scan is shorter than fine gray scan. So, fast gray Scanning speed is high.

6.10. Bits Depth

16 x3 Bits true color , 16 bits gray level and one bit Black & White.

Image data type : 16 bits , 8 bits and 1 bit data type.

6.11. Shading & Correction

a. White Shading & Dark Shading:

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