Terminology - Zenith D52WLCD Series Service Manual

TERMINOLOGY

This section explains some of the terminology used with LCD RPTVs. Viewing angle, IPS (In-Plane Switching), Tuning
Standards, Peak Brightness, Contrast Ratio, Response Time, and DVI (Digital Video Interface).
VIEWING ANGLE
Viewing angle is the angle at which the display's brightness begins to noticeably diminish. Viewing on the LCD RPTVs
is limited due to the Viewing Screen (see page 21).
IPS (IN-PLANE SWITCHING)
In-Plane Switching provides more control over
the Liquid Crystals in an LCD. It uses an electric
field to line up the Liquid Crystals in an arc
formation. This directs light out at angles which
improves the viewing angle.
PEAK BRIGHTNESS
Peak brightness is the maximum amount of brightness that a display can produce. It is often measured in candella per
square meter (cd/m2). The D60WLCD is rated at 680 cd/m
CONTRAST RATIO
Contrast Ratio is the ratio of a display's
brightest white to its darkest black. One of the
limitations of LCDs has been contrast ratio. The
D60WLCD features a 200:1 contrast ratio.
RESPONSE TIME
The speed at which the pixels can react or change. Slower response times can cause fast moving video to "ghost" or
distort because the scene changes faster than the LCD can display the video (especially with video games). The
response time of new LCDs isn't a factor for most uses, but older models can display noticeable ghosting due to slower
response times.
D52WLCD
THEORY
Conventional TFT-LCD
2
19
Liquid Crystal
Electrode
IPS Mode TFT-LCD
OVERVIEW