Will my TV work with Digital TV?

I own the Philips 60PW9383 TV (that I purchased 4 years ago). Do I need to buy a converter box for it? I've looked everywhere on the web, and I don't have the instruction manual. Thanks for any help.
If it is 4 years old then i would say yes. keep in mind that just because a TV is an HDTV (not sure if yours is or not) that doesn't guarantee compliance.

Also keep in mind that if you use satellite or cable you don't need a box. a converter is only for those who use a indoor or outdoor over-the-air antenna (aka rabbit ears).