Hallo Asok,

sorry, but it's not a question of bio rythm to find your post to be totally vague and unspecific! And it's no joy to try to read between the lines. Please be more specific!

I still don't know, whether you have any kind of mulitplexing or not. If so, what are you multiplexing, rows or columns? This is important, because it tells how many LEDs must be driven by each output.
Also, I do not know up to now, what kind of LEDs you use. Please have a look at this discussion about efficiency of LEDs:

http://www.8052.com/forum/read.phtml?id=71260

From this one you can see, that requirements about drive capability can be totally different, depending on what kind of LEDs you use!

So, all I can say here is:

If you use a multiplexing methode, then driver must be able to sink or source much more current then when only driving one LED. So, it's very probable that a chip of CD4000 series will not be able to do the job. Only a chip of 74LS or 74HC series, and TPIC6A595 of course, might be able to sink enough current, but whether it's enough for your requirements can only be answered if we at least have an idea about your actual circuit!!

The link you refered to, namely

http://www.8052.com/forum/read.phtml?id=50396

uses transistors to be able to provide enough source and sink current. By the way, what's wrong using transistors in such an application?? Really big currents can be handled by them without any problems. And limited rise time of currents help to keep EMI (electromagnetic interference) under control!

Kai