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Industry Terms
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Industry Terms
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
Laptop
Laser Pointer
LCD
LCD Projection Panel
LCD Projector
Light Valve
Long Throw Lens
Luminance
Lux
Laptop [top]
A small portable computer with a self contained LCD display.
Laser Pointer
[top]
A small pen or cigar sized device that contains a small battery powered laser, which can project a small, red, high intensity spot of light that is immediately very visible on the screen.
LCD [top]
Liquid Crystal Display - a glass panel display that works by controlling the opacity of segments of itself by varying the electrical signal. Each individual segment called a pixel, acts as a shutter, to control the amount of light being passed through.
LCD Projection Panel
[top]
The predecessor to today's self contained projectors. They lack their own light source, and instead, sit on top of a overhead projector. Although panels are light (5-8LB.), even on specially designed, extremely bright, overhead projectors, their image is not as bright as today's self-contained projectors. Therefore use is limited to darkened rooms on small screens.
LCD Projector [top]
A projector using an LCD to modulate the light.
Light Valve [top]
Another projection technology, found in the "big" systems, these units are extremely bright and capable of producing "stadium size" images.
Long Throw Lens [top]
A lens designed for projection from a very long distance. Long throw lenses would be used in a projection booth in the back of a theater, etc. A typical long throw lens might have to be 50 to 100 ft. back to project a 10 ft. diagonal image.
Luminance [top]
The relative brightness values of a particular object in a scene.
Lux [top]
A unit for measuring light, as methods of measurement are not standardized, numbers provided by manufacturers usually do not provide all necessary information to compare one product to another. A preferred unit of measuring light output is the ANSI Lumen.
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