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Electroluminescent (EL) displays have been a niche format and are rarely used nowadays. Some uses have included the Apollo Guidance Computer 7-segment numerical displays, to indicate speed and altitude at the front of the Concorde, and as floor indicators on Otis Elevators from around 1989 to 2007, [7] mostly only available to high-rise buildings and modernizations.
Views of a liquid crystal display, both with electroluminescent backlight switched on (top) and switched off (bottom). Electroluminescence (EL) is an optical and electrical phenomenon, in which a material emits light in response to the passage of an electric current or to a strong electric field.
An organic light-emitting diode (OLED), also known as organic electroluminescent (organic EL) diode, [1] [2] is a type of light-emitting diode (LED) in which the emissive electroluminescent layer is an organic compound film that emits light in response to an electric current.
AMOLED (active-matrix organic light-emitting diode; / ˈ æ m oʊ ˌ l ɛ d /) is a type of OLED display device technology. OLED describes a specific type of thin-film-display technology in which organic compounds form the electroluminescent material, and active matrix refers to the technology behind the addressing of pixels.
The credit-card sized, battery-powered RAM cards come with capacity sizes of 256 kb or 512 Kb. Both RAM cards and ROM cards use a proprietary NEC interface because this laptop came out at a time when there were no standard portable computing interfaces. The PCMCIA standard did not exist until 1990. The RAM cards were powered by a replaceable 3 ...
Electrically operated display devices have developed from electromechanical systems for display of text, up to all-electronic devices capable of full-motion 3D color graphic displays. Electromagnetic devices, using a solenoid coil to control a visible flag or flap, were the earliest type, and were used for text displays such as stock market ...
Views of a liquid-crystal display, both with electroluminescent backlight switched on (top) and switched off (bottom). A backlight is a form of illumination used in liquid-crystal displays (LCDs) that provides illumination from the back or side of a display panel.
A display device is an output device for presentation of information in visual [1] or tactile form (the latter used for example in tactile electronic displays for blind people). [2] When the input information that is supplied has an electrical signal the display is called an electronic display .