| Home > Electronics > Projectors > |
See the 2008 Circle of Excellence Winners!© 2009 Shopzilla, Inc.
Shopzilla is a Scripps Networks Interactive company.
| Home > Electronics > Projectors > |
|
Brightness Contrast Ratio Horizontal Frequency Maximum Resolution Native Resolution Projection Distance Projector Type Vertical Frequency Video Standard Type |
The brightness of a projector, measured in lumens, refers to the amount of light produced in order to display clear images onto the screen. The higher the projector’s lumens, the higher quality images it can produce in a room with more light.
Back to topContrast ratio compares the brightest area of an image to the darkest area. The higher the contrast ratio, the better the ability to show the subtlest color details.
Back to topHorizontal frequency describes the rate at which a device scans the total number of horizontal lines per second in a displayed image.
Back to topMaximum resolution, measured in pixels, refers to the highest quality of image a device can display.
Back to topNative resolution, also known as true resolution, describes the fixed array of pixels that a device can display.
Types
SVGA: Super Video Graphics Array devices feature a native resolution of 800 x 600 pixels.
XGA: Extended Graphics Array devices feature a native resolution of 1024 x 768 pixels.
SXGA: Super Extended Graphics Array devices feature a native resolution of 1280 x 1024 pixels.
UXGA: Ultra Extended Graphics Array devices feature a native resolution of 1600 x 1200 pixels.
Projection distance is the space between the projector lens and projection surface. The further the projector lens from the surface, the larger the image can be shown.
Back to topLCD Projectors: Liquid Crystal Display projectors use three different panels to facilitate the movement of red, green, and blue colors from each panel through the viewing lens and onto the projector screen.
DLP Projectors: Digital Light Processing Projectors use a new technology from Texas instruments in order to store digital images, and then project those images off of millions of tiny mirrors operated by a microchip.
CRT Projectors: Cathode Ray Tube projectors use three tubes to process red, green, and blue colors separately, and then project them together to create the full image.
Vertical frequency describes the rate at which a device scans the total number of vertical lines per second in a displayed image.
Back to topThe Video Standard describes the resolution and frame rate of a projector.
Types
NTSC: The National Television System Committee Standard has a fixed vertical resolution of 525 lines and a frame rate of 30 frames per second.
PAL: The Phase Alternation by Line Standard has fixed vertical resolution of 625 lines and a frame rate of 25 frames per second.
SECAM: The Systeme Electronique Couleur Avec Memoire Standard has a fixed vertical resolution of 625 lines and a frame rate of 25 frames per second.
