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To generate white light best suited as an LCD backlight, parts of the light of a blue-emitting LED are transformed by quantum dots into small-bandwidth green and red light such that the combined white light allows a nearly ideal color gamut to be generated by the RGB color filters of the LCD panel. The quantum dots may be in a separate layer as ...
In photography, a back light (often the sun) that is about sixteen times more intense than the key light produces a silhouette. A fill flash used with a backlit subject yields more even lighting. The vertical angle of the back light can change the effect. A low angle can make the light hit the camera lens, causing lens flare. A high angle can ...
Architectural lighting design is a field of work or study that is concerned with the design of lighting systems within the built environment, both interior and exterior. It can include manipulation and design of both daylight and electric light or both, to serve human needs. [1] [2] Lighting design is based in both science and the visual arts.
Simple types of LCDs such as those used in pocket calculators are built without an internal light source, requiring external light sources to convey the display image to the user. Most LCD screens, however, are built with an internal light source. Such screens consist of several layers. The backlight is usually the first layer from the back.
Lighting powered by gas was available in many towns from the start of the Victorian era. By the end of the Victorian era, many houses had gas. By the end of the Victorian era, many houses had gas. A basement with a cellar for the storage of coal, required for open fires and to heat water.
The stone buildings imposed on England by the Romans would have been 'startling' and 'exceptional', and following the collapse of Roman society in the fifth century there was a widespread return to timber building, a 'cultural shift' that it is not possible to explain by recourse to technological determinism.
Stone lanterns (灯籠/灯篭/灯楼, Chinese: dēnglóng; Japanese: tōrō, meaning 'light basket', 'light tower') [a] are a type of traditional East Asian lantern made of stone, wood, or metal. Originating in China, stone lanterns spread to Japan, Korea and Vietnam, though they are most commonly found in both China – extant in Buddhist ...
Track lighting is usually combined with directional lamps with reflectors, such as spotlights. [1] These lamps can run under either mains voltage or a lower (often 12 V) voltage. It is common to see line-voltage tracks with low-voltage fixtures. For these, each fixture requires a small built-in transformer to operate it.