Could I make my TV show my Macbook screen as clear as a monitor?

I have an S-video adaptor for Mac and a 20 inch HDTV, but when I hook it up it looks more like a projector (fuzzy and text isn’t clear, videos look fine tho). Is this as good as it gets without an actual monitor? It isn’t horrible by any means, but it seems like it isn’t made to put out a clear picture like if I were to buy a 20 inch computer monitor.