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frame dimming: adjusts the brightness of the entire backlight based on the content displayed, as if local dimming was supported but only with a single zone; local dimming: multiple vertical or horizontal zones are individually controlled; direct-lit (DLED) or full-array: LEDs form an array directly behind the screen at equally spaced intervals.
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.
Thus the input energy is converted to mostly infrared but also as visible light. The screen heats up to between 30 and 41 °C (86 and 106 °F) during operation. Depending on the phosphors used, different colors of visible light can be achieved. Each pixel in a plasma display is made up of three cells comprising the primary colors of visible light.
A scrim is a device used in the film and television industries, as well as by photographers, to modify properties of light. There are variations on types of scrim, depending upon its use, whether with natural light, or with man-made light sources. However, their basic use is the same – to reduce intensity and/or harshness of light.
Digital Serial Interface (DSI) is a protocol for the controlling of lighting in buildings (initially electrical ballasts).It was created in 1991 by Austrian company Tridonic and is based on Manchester-coded 8-bit protocol, data rate of 1200 baud, 1 start bit, 8 data bits (dimming value), 4 stop bits, and is the basis of the more sophisticated protocol Digital Addressable Lighting Interface (DALI).
Lighting control systems serve to provide the right amount of light where and when it is needed. [ 1 ] Lighting control systems are employed to maximize the energy savings from the lighting system, satisfy building codes , or comply with green building and energy conservation programs.
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