Contrast Ratio - Panasonic TC-P50VT20 Technical Manual

Contrast Ratio

Note: Native Contrast is expressed as a ratio of the minimum of luminance levels
of blacks and the maximum of luminance levels of whites that are displayed and
measured at the same time on the same screen in a dark room on a plasma
panel module.
Panasonic's Native Contrast measurement expresses the maximum contrast ratio
of the plasma panel measured at the time of manufacture and does not express a
contrast ratio measured during ordinary viewing conditions by a consumer.
For 2010 plasma television models, Panasonic measures Native Contrast in a
Dynamic mode using a static white rectangular pattern with 4% area size. This
allows consumers to compare more easily the Native Contrast ratios reported for
Panasonic plasma televisions with the Dynamic Contrast ratios reported by many
manufacturers of LCD televisions.
Depending on the model, Native Contrast of the panel has been measured as
either 5,000,000:1 or 2,000,000:1. Unlike measurements taken for previous
models, Pre-Discharges do not occur for the images used in the 2010 model
measurements, so the results should not be compared to contrast ratios reported
for earlier year Panasonic models.
Most manufacturers use the Dynamic Contrast methodology in measuring
contrast ratios for LCD televisions. This methodology, unlike the Panasonic Native
Contrast ratio measurement for plasma televisions, compares the maximum
luminance levels on full white signal in one picture with the minimum luminance
levels on full black signal in another picture.
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