LCDd is one of those well known *NIX daemons. BUT it's not just *one* daemon. It's the one that is supposed to drive your LCD ;)
LCDd can either be run from the command line or automatically by the init scripts shipped with the distribution.
As other daemons, LCDd has to be configured. In this respect a lot has changed since LCDproc 0.4.1. While LCDd retrieved all its configuration settings from the command line in 0.4.1, it now has a configuration file, which is normally /etc/LCDd.conf.