The technical term for the projector screen.
- Ambient light
All light in a viewing room produced by sources other than the screen. - Aspect ratio
The numeric relationship between a screen’s height and width. - Brightness
A viewer’s subjective response to luminance. - Contrast ratio
The numeric relationship between the brightness and the darkest portions of a Displaying expressed in foot-Lamberts as a ratio of Max:Min. - Drop
The area between the top, or the bottom, of the viewing area and the screen housing. - Foot-candle
The fundamental unit of illumination representing the light intensity over a 1 square foot surface which is 1 foot away from a standard candle. - Foot-lambert
A unit of luminance equivalent to 1 lumen per square foot. - Gain
A measurement usually made perpendicular to screen center of the from luminance transmitted by the screen, divided by the luminance radiating the projector. - HDTV
High Definition Television in ratio 16 : 9 - Keystone
The distortion of the projected image when the screen is not perpendicular with the center line of the projected image. - Lenticular
Screen surface comprised of a geometric embossing pattern. The shape of the pattern affects view\angle performance and reflection of ambient light. - Luminance
The measured brightness of a screen, expressed in foot-lamberts. - Masking borders
The black portion surrounding the viewing area of a screen. - Projection axis
The direction of an imaginary line extending from the center of the projection lens through the screen’s center. - Throw distance
The length of the projection beam necessary for a particular projector to produce an image of a specified size. - Viewing Angle
The angle from a specified viewing position to the center of the screen. It is usually measured on the horizontal or on the vertical axis. - LCD
Light Charged Device. Save Technology used in TV and computer monitors. - DLP
Digital Light Panel. Adopted Texas Instrument IC Chip called “Digital Mirror Device” to achieve true colors image used in DLP Projector. - Video Format
Screen format in ratio 4:3
