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TERMINOLOGY
TERMINOLOGY
This section explains some of the terminology used with LCD TVs.
VIEWING ANGLE
Viewing angle is the angle at which the display's brightness begins to noticeably diminish. Viewing
angle used to be a major factor when choosing an LCD but they have improved enough on current
models that it is not an issue anymore. This is due to advancements like In-Plane Switching, High-
efficiency Backlights, and reflective Polarizers. Some smaller screen LCDs (under 15") may still have
limited viewing angles to keep costs down.
IPS (IN-PLANE SWITCHING)
Liquid Crystal
In-Plane Switching provides more control over the
Electrode
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
Conventional TFT-LCD
IPS Mode TFT-LCD
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). Most
LG and Zenith LCDs are 400-450 cd/m2.
CONTRAST RATIO
Contrast Ratio is the ratio of a display's
brightest white to its darkest black. Higher
Contrast Ratios are better and will allow a
TV to reproduce a more realistic picture
and make text easier to read. One of the
limitations of LCDs has been contrast ratio.
With recent improvements, our LCD TVs have a contrast ratio up to 450:1.
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). Response times of new LCDs isn't a factor for most uses, but older models could
experience noticable ghosting due to slower response times.
7
Directview LCD Training
Terminology
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