PRODUCT GROUP
TFT-LCD PRODUCT
Note :
REV
O
ISSUE DATE
2008. 2.11
1.
2.
Viewing angle is the angle at which the contrast ratio is greater than 10. The viewing are
determined for the horizontal or 3, 9 o’clock direction and the vertical or 6, 12 o’clock
direction with respect to the optical axis which is normal to the LCD surface.
( see FIGURE 1 shown in Appendix )
Contrast measurements shall be made at viewing angle of
Θ=
0° and at the center of the
LCD surface. Luminance shall be measured with all pixels in the view field set first to
white, then to the dark (black) state. (See FIGURE 1 shown in Appendix) Luminance
Contrast Ratio (CR) is defined mathematically.
Luminance when displaying a white raster
Luminance when displaying a black raster
CR =
3.
4.
4
5.
6.
The White luminance uniformity on LCD surface is then expressed as :
ΔY
= Maximum Luminance of 5(or 13) points / Minimum Luminance of 5(or 13) points.
( see FIGURE 2 shown in Appendix )
The color chromaticity coordinates specified in Table 4 shall be calculated from the
spectral data measured with all pixels first in red, green, blue and white. Measurements
shall be made at the center of the panel.
The electro-optical response time measurements shall be made as FIGURE 3 shown in
Appendix by switching the “data” input signal OFF and ON. The times needed for the
luminance to change from 10% to 90% is Tr, and 90% to 10% is Td.
Cross-Talk of one area of the LCD surface by another shall be measured by comparing
the l i
h luminance (Y
A
) of a 25
f 25mm di
diameter area, with all di l pixels set to a gray l
i h ll display i l
level, to
l
the luminance (Y
B
) of that same area when any adjacent area is driven dark.
( see FIGURE 4 shown in Appendix )
SPEC. NUMBER
B2005-C001-B (3/3)
SPEC. TITLE
HV089WX1-100 Product Specification for Customer
PAGE
9 OF 27
A4(210 X 297)
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