I got this text from  Wikipedia:

The I Love Lucy show was not only a star vehicle for Lucille Ball, but a way for her to try to salvage her marriage to Desi Arnaz, which had become badly strained, in part by the fact that each had a hectic performing schedule which often kept them apart.

Along the way, she created a television dynasty and reached several "firsts". Ball was the first woman in television to be head of a production company: Desilu, the company that she and Arnaz formed. (After buying out her ex-husband's share of the studio, Ball functioned as a very active studio head.)

For more facts check here: http://en.wikipedia.org/wiki/Lucille_Ball