Appendix C: glossary of terms
Digital Projection Ltd. E-Vision Laser 13000 WU Series
B
Blanking (projection)
The ability to intentionally turn off, that is, set to black, areas around the edges of the projected image. It is sometimes referred to as “curtains” since it can
be used to blank an area of image that literally falls on the curtains at the side of the screen in a movie theater. Usually no image resizing or geometric
correction takes place and the “blanked” part of the image is lost. Not to be confused with horizontal and vertical blanking (video signal).
Blanking (video signal)
The section of the video signal where there is no active video data. Not to be confused with blanking (projection).
Blend region
The area of the image that is to overlap with another image in an edge blend setup. Sometimes called overlapping region.
Brightness (electronic control)
A control which adds a fixed intensity value to every pixel in the display, moving the entire range of displayed intensities up or down, and is used to set the
black point in the image (see Contrast). In Component Video signals, brightness is the same as luminance.
Brightness (optical)
Describes how ‘bright’ an image that is projected onto a screen appears to an observer.
C
C
Also known as ‘C’, this is the component, or pair of components, of a Component Video signal which describes color difference information.
Chrominance
Also known as ‘C’, this is the component, or pair of components, of a Component Video signal which describes color difference information.
Color difference
In Component Video signals, the difference between specified colors and the luminance component. Color difference is zero for monochrome images.
Color gamut
The spectrum of color available to be displayed.
Color temperature
The position along the black body curve on the chromaticity diagram, normally quoted in Kelvin. It takes into account the preset values for color balance in
the service set-up to take up the variations in the prism. The projector allows you to adjust this temperature (i.e. adjust the picture color temperature).
Component video
A three-wire or four-wire video interface that carries the signal split into its basic RGB components or luminance (brightness) and two-color difference
signals (YUV) and synchronization signals.
Reference Guide
Rev A June 2019
page 117
Notes
