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  2. List of keyboard switches - Wikipedia

    en.wikipedia.org/wiki/List_of_keyboard_switches

    Switch name Stem design Switch type Click type Initial force Actuation force Spring force Actuation point Total travel Mounting type Factory lube SMD LED compatibility Key stroke lifespan Drop x Invyr Kailh Holy Panda [22] MX Type stem Tactile N/A 67 g 67 g 67 g 1.2 mm 4.0 mm Plate mounting No Yes 80 million Drop Kailh Halo True [23] MX Type stem

  3. Keyboard technology - Wikipedia

    en.wikipedia.org/wiki/Keyboard_technology

    This type of switch are usually composed of a housing, a spring, and a slider, and sometimes other parts such as a separate tactile leaf or clickbar. Cherry MX switch contacts. At rest, the metal contacts inside of the switch are held apart. As the switch is pressed down, the contacts are held together to conduct current for actuation.

  4. Circuit diagram - Wikipedia

    en.wikipedia.org/wiki/Circuit_diagram

    A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations.

  5. Liquid-crystal display - Wikipedia

    en.wikipedia.org/wiki/Liquid-crystal_display

    Transflective LCDs combine the features of a backlit transmissive display and a reflective display. The common implementations of LCD backlight technology are: 18 parallel CCFLs as backlight for a 42-inch (106 cm) LCD TV. WLED array: The LCD panel is lit by a full array of white LEDs placed behind a diffuser behind the panel.

  6. Light switch - Wikipedia

    en.wikipedia.org/wiki/Light_switch

    Many variations on this theme have been created and marketed. "Touch-plate" devices can be operated by touching or merely waving a hand near the switch. Touch switches have no moving parts and electronically switch the light circuit. As of 1986 these remain specialty items. Electronic switches provide flexibility in terms of different ...

  7. LED-backlit LCD - Wikipedia

    en.wikipedia.org/wiki/LED-backlit_LCD

    An LED-backlit LCD is a liquid-crystal display that uses LEDs for backlighting instead of traditional cold cathode fluorescent (CCFL) backlighting. [1] LED-backlit displays use the same TFT LCD ( thin-film-transistor liquid-crystal display ) technologies as CCFL-backlit LCDs, but offer a variety of advantages over them.

  8. Backlight - Wikipedia

    en.wikipedia.org/wiki/Backlight

    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. LCDs do not produce light by themselves, so they need illumination ( ambient light or a special light source) to produce a visible image.

  9. Electroluminescence - Wikipedia

    en.wikipedia.org/wiki/Electroluminescence

    This converter often makes a faintly audible whine or siren sound while the backlight is activated. Line-voltage-operated devices may be activated directly from the power line; some electroluminescent nightlights operate in this fashion. Brightness per unit area increases with increased voltage and frequency. [5]