The history of video game consoles, both home and handheld, had their origins in the 1970s. The concept of home consoles used to play games on a television set was founded by the 1972 Magnavox Odyssey, first conceived by Ralph H. Baer in 1966. Handheld consoles bore out from electro-mechanical games that had used mechanical controls and light-emitting diodes (LED) as visual indicators. Handheld electronic games had replaced the mechanical controls with electronic and digital components, and with the introduction of Liquid-crystal display (LCD) to create video-like screens with programmable pixels, systems like the Microvision and the Game & Watch became the first handheld video game consoles, and fully realized by the Game Boy system.