1963 ad for Banquet turkey TV dinners.
According to the US Census Bureau, TV dinners were invented by Swanson in 1953:
Overestimating the need for Thanksgiving turkeys, the firm found itself with over a half-million pounds of unsold turkey. Enter a salesman named Gerry Thomas. He modified a tray used by airlines into one with three compartments, filled it with a turkey dinner, and suggested tying the idea to the nation’s latest craze — television. And so the TV dinner was born.
Ad found at Thoroughly Modern Merrill.