Features; Advanced Iris - Sony KDS-50A2000 Training Manual

Backlight
Source
NOTE: Full potential
applied means full
SXRD LCD twist,
and complete
passage of light by
the front filter
EFFECT OF A POTENTIAL ON SXRD PANEL
VOLTAGE EFFECT ON SXRD LIQUID CRYSTALS

Features

Advanced Iris

The Average Picture Level (APL) drives the Advanced Iris operation. APL
n video systems, as the average level of the picture signal
is defined i
during active scanning time integrated over a frame period; defined
as a percentage of the range between blanking and reference white
level. Basically, the video scene is measure for overall brightness
level and the iris's aperture opening is increased of decreased to
either increase the whites in the brighter scenes, or decrease the
blacks in the darker scenes. Subsequently, achieving a contrast
ratio for the SXRD models approaching 10,000:1.
TVP-23
- +
Full Open
500 cd/m2
White
Black
0.05 cd/m2
0 cd/m2
*Candela per Meter Square
ADVANCED IRIS LIGHT LEVEL CHART
Advanced Iris
Full Closed
*
250 cd/m2
White
Black
0.025 cd/m2
Introduction
3