Here's a 1969 Popular Science article about LCD's and work to make LCD TV's: http://books.google.com/books?id=wSo...d%20tv&f=false

And a 1970 PS article on LED's: http://books.google.com/books?id=-AA...0diode&f=false

According to the 1969 article RCA could create a high resolution still image, but was totally unable to make a moving picture.

As I understand it, what finally made LCD tv a reality was the built in computers that can process the huge amount of information needed to create a moving image. Electronics of 40+ years ago were unable to process a signal and turn on and off all those tiny dots quickly enough.