Digital Clock(1956)
An electronic form of timekeeping is born. * Clocks usually have have two jobs. * One is to display the right time; the other is to give a measurement of a time interval. * Digital clocks are numeric. * Hours,minutes and seconds are represented by numbers and the display can be made small and linear. * Although German Inventor Josef Pallweber patented a digital watch as early as 1883, the development of the digital clock proper is closely associated with the history of the digital displays. * The earliest examples of these were the glowing end of valve tubes that can indicate numbers. * These were much loved by the nuclear physics instrumentation industry in the 1950s. *The modern digital clock relied significantly on the development of the light emitting diode (LED) and liquid crystal display (LCD). * The first commercially usable LEDs were developed in the 1960s, and the first active matrix LCD panel was produced in 1972. * Film director Stanley Kubrick famously showed a futuris...