ACX704AKM Datasheet, PDF (25/32 Pages) Sony Corporation – 9.60cm (3.78 Type) QVGA Reflective Color LCD Module

ACX704AKM
Cross Modulation
Cross modulation (cross talk) shall be inspected with following test pattern with 2% ND filter. Pattern is black
box 80 pixels wide and 160 pixels in length at minimum luminance, centered horizontally and vertically in the
active area. The reminder is of the screen is 50% gray.
H/4
H/2
H/4
H/4
H/2
H/4
There shall be no visible difference of luminance around the black box through 2% ND filter.
Notes:
1. Reflectivity (R)
In the system-1 (see Fig. 1 (a), (b)), calculate the reflectance factor by using the formula (1).
R = R (White) = ^{Output from the "White" displayed panel} × reflectance factor of the reflectance standard …(1)
Output from the reflectance standard
2. Contrast Ratio (CR)
In the system-1 (see Fig. 1(a), (b)), measure the reflectance factor of "White" and "Black" respectively and
calculate by using the formula (2).
R (White)
CR =
…(2)
R (Black)
3. White Chromaticity (xfloff, yfloff)
In the system-2 (see Fig. 2), measure the white chromaticity. The illumination source and viewing area are
D65 and 2° respectively.
4. Response Time (Ton, Toff)
In the system-3 (see Fig. 3), measure the electro-optical response time.
5. Viewing Angle (VAtb, VAlr)
In the measurement system-1 (see Fig. 1 (c)), viewing area is defined by the area which makes the CR ≥ 2.
6. V-R Characteristic (V90, V50, V10)
In the system-1 (see Fig.1 (a), (b)), measure the signal amplitude across the liquid crystal
where R (relative) = 90% and R (relative) = 50% and R (relative) = 10% (see Fig. 4).
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