Philips 170S6FB User manual - Page 19
Glossary, Active matrix, Amorphous silicon a-Si, Aspect ratio, Brightness
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Glossary Glossary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Active matrix This is a kind of liquid crystal display structure in which switching transistors are attached to each pixel to control the on/off voltage. It produces a brighter and sharper display with a broader viewing angle than a passive matrix display. Also refer to TFT (thin film transistor). Amorphous silicon (a-Si) A semiconductor material that is used to make the thin film transistors (TFTs) layer of an active matrix LCD. Aspect ratio The width-to-height ratio of the active area of a display. In general, most monitors have an aspect ratio of 4:3. Wide monitors or TVs have an aspect ratio of 16:9 or 16:10. B Backlight The light source for a transmissive LCD. There are two techniques used in nowaday LCD designs. Most TFT LCD panels use CCFLs (cold cathode fluorescent light) and a diffuser panel directly behind the liquid crystal layer. New technology using Light Emitting Drodes (LED) are still under development. Brightness The dimension of color that is referred to an achromatic scale, ranging from black to white, also called lightness or luminous reflectance. Because of confusion with saturation, the use of this term should be discouraged. file:///D|/My%20Documents/dfu/A7/english/170s6/glossary/glossary.htm (1 of 9)2005-01-21 1:58:20 PM