What are "LCD common sink current"

Hi All
1. What are "LCD common sink current", "LCD common source current", "LCD segment sink current" and "LCD segment source current?For more detailed information, please vist this website
http://www.lcmlcd.net/uploadimage/2007112162525.pdf
2. How to design them?
Thanks you in advance.

你打个电话给那个公司吧

It means that the buffer design, 能够流进也能够流出电流。
Segment一般是由不同电压的buffer去推动的
Common是共电极，也是一个buffer去推动的