This is his thing. When you create a TV show broadcast on network TV, one of the things you (as a producer or production company) are entitled to is 1.5s of broadcast at the end of the credits for what is known as a vanity card. Some others you might have seen:
Bad Robot Productions (J.J. Abrams)
Mutant Enemy Productions (Joss Whedon)
There is an entire archive of them you can view here.
Lorre, as creator of number of TV shows for CBS, including The Big Bang Theory, Dharma & Greg, and Two and a Half Men, has spent his entire 20+ year career using his 1.5s to publish his thoughts on a variety of subjects from the mundane to the bizarre. He now has over 400 different published short-essays in the form of vanity cards, all of which can be found on his personal website:
http://www.chucklorre.com/index.php
Edit history
= new reply since forum marked as read