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A liquid-crystal display ( LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly [ 1] but instead use a backlight or reflector to produce images in color or monochrome.
Screen burn-in, image burn-in, ghost image, or shadow image, is a permanent discoloration of areas on an electronic visual display such as a cathode-ray tube (CRT) in an older computer monitor or television set. It is caused by cumulative non-uniform use of the screen. Newer liquid-crystal displays (LCDs) may suffer from a phenomenon called ...
Wireless power transfer ( WPT ), wireless power transmission, wireless energy transmission ( WET ), or electromagnetic power transfer is the transmission of electrical energy without wires as a physical link. In a wireless power transmission system, an electrically powered transmitter device generates a time-varying electromagnetic field that ...
12. They weren't always called Golden Retrievers. Before the pups were officially named "Golden Retrievers" in 1920, the breed was titled "Yellow or Golden Retriever" in order to differentiate it ...
Gravitational energy, or gravitational potential energy, is the potential energy a massive object has because it is within a gravitational field. In classical mechanics, two or more masses always have a gravitational potential. Conservation of energy requires that this gravitational field energy is always negative, so that it is zero when the ...
The call and text message records of hundreds of millions of AT&T cellphone customers in mid-to-late 2022 were exposed in a massive data breach, the telecom company revealed Friday.
Two Ohio lawmakers were joined by an NFL players union representative on Tuesday in unveiling legislation to require the state’s professional sports teams to play on natural grass. The effort is ...
The term negative resistance means negative differential resistance ( NDR ), . In general, a negative differential resistance is a two-terminal component which can amplify, [2] [7] converting DC power applied to its terminals to AC output power to amplify an AC signal applied to the same terminals.