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There are a few different technologies that are used to build widescreen tvs today.
If your set is a panel TV (either plasma or lcd), the repair of this TV would be too expensive.
If your set is a projection type TV (DLP or LCD or Tube), the TV can be repaired and the cost will depend on if the crack penetrates the lenticular screen which is located under a protective screen. If it's just the protective screen that was damaged repair should be less than $250.00. If it's both you're probably looking at a $700.00 (or more) repair.
Please let me know if you would like more information and/or clarification.
Yes, I'm afraid that sounds like the linticular screen has been damaged. This is a projection TV correct?
I'm afraid you will have a fairly expensive repair on the TV (as high as $700). You can check with the servicer to see what they get for replacing the JVC lenticular screens and screen protector. A phone call can confirm what each service would charge.