Shanghai SVA - NEC Liquid Crystal Display Co., Ltd ... - Fortec AG
Shanghai SVA - NEC Liquid Crystal Display Co., Ltd ... - Fortec AG
Shanghai SVA - NEC Liquid Crystal Display Co., Ltd ... - Fortec AG
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SN-SA-A0003-01-E 19/31<br />
4.9.2 Definition of contrast ratio<br />
The contrast ratio is calculated by using the following formula.<br />
<strong>Co</strong>ntrast ratioCR= Luminance of white screen<br />
Luminance of black screen<br />
4.9.3 Definition of luminance uniformity<br />
The luminance uniformity is calculated by using the following formula.<br />
Luminance uniformityLU=Maximum luminance from <br />
Minimum luminance from <br />
The luminance is measured at near the 5 points shown below.<br />
171 512 853<br />
126<br />
<br />
<br />
384<br />
<br />
640<br />
<br />
<br />
4.9.4 Definition of response times<br />
Response time is measured, the luminance changes from “white” to “black”, or “black” to “white” on<br />
the same screen point, by photo-detector. Ton is the time it takes the luminance change from 90% down to<br />
10%. Also Toff is the time it takes the luminance change from 10% up to 90%. (See the following<br />
diagram.)<br />
100%<br />
90%<br />
White<br />
Luminance<br />
Black<br />
10%<br />
0%<br />
4.9.5 Definition of viewing angles<br />
Left<br />
Ton<br />
Normal axis (Perpendicular)<br />
<br />
Upper<br />
<br />
<br />
<br />
12 o’clock<br />
Toff<br />
Lower<br />
Right<br />
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<strong>Shanghai</strong> <strong>SVA</strong> <strong>NEC</strong> <strong>Liquid</strong> <strong>Crystal</strong> <strong>Display</strong> <strong>Co</strong>., <strong>Ltd</strong>.
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