From the original mechanical television to the electronic television, this display apparatus of moving images went through many periods. In the 1920's, John Baird patented the idea of using arrays of transparent rods to transmit images for television. In 1927, Philo Taylor Farnsworth, an American inventor, invented "the first fully functional all-electronic image pickup device (video camera tube), the 'image dissector', as well as the first fully functional and complete all-electronic television system" (Hearst, 1934).
"Current Topics and Events", Nature, vol. 115, April 4, 1925, p. 505–506, doi:10.1038/115504a0.