Definition of these measurement items is as follows:
*1) Definition of Contrast Ratio:
［
These items are measured using BM-5A (TOPCON) under the
dark room condition (no ambient light).
］
CR=ON (White) Luminance/OFF (Black) Luminance
*2) Definition of Luminance, Luminance uniformity, Contrast, and the Deviation of Color
Coordinate:
Luminance and Contrast: To measure at the center position “5” on the screen (NO.5), see
Figure.8-1 below.
Luminance uniformity: Lw (MAX) and Lw(MIN) are the maximum and minimum luminance
value measure at the position “1~5” on the screen (NO.1~5), see
Figure.8-1 and below show equation:
Δ
Lw
＝
[ (Lw(MIN)) / Lw(MAX) ] × 100%
The Deviation of Color Coordinate: To measure at the position “1~5” on the screen
(NO.1~5), see Figure.8-1 below.
1
2
5
3
4
(1,1)
192
384
576
341.5
683
1024.5
(1366,768)
Figure 8-1. Measurement Positions
65
