Science: TV in a Picture Frame

Almost from the time that the first television picture tube appeared in the 1920s, electronic engineers have been looking for a simpler, less fragile and more economical device for displaying images transmitted over the air waves. Now scientists at the Westinghouse Research Laboratories in Pittsburgh think that they may have found a way. At this month's electro-optics and international laser exhibition in San Francisco, they displayed the prototype of a flat-screen TV system that is less than one-eighth of an inch thick and may some day be hung on a wall like a pane of plate glass in an ordinary picture...