LCX027AKB Datasheet, PDF (14/23 Pages) Sony Corporation – 1.4cm (0.55-inch) NTSC/PAL Color LCD Panel

LCX027AKB
6. Response Time
Response time ton and toff are defined by
the formulas (5) and (6) respectively.
Input signal voltage (waveform applied to the measured pixels)
ton = t1 – tON ...(5)
toff = t2 – tOFF ...(6)
4.0V
6.0V
0.5V
t1: time which gives 10% transmittance of
the panel.
t2: time which gives 90% transmittance of
the panel.
The relationships between t1, t2, tON and
tOFF are shown in the right figure.
0V
Optical transmittance output waveform
100%
90%
10%
0%
tON t1
ton
tOFF t2
toff
7. Flicker
Flicker (F) is given by the formula (7). DC and AC (NTSC: 30Hz, rms, PAL: 25Hz, rms) components of the
panel output signal for gray raster^∗ mode are measured by a DC voltmeter and a spectrum analyzer in
System II.
{ } ^{F (dB) = 20log}
AC component
DC component
...(7)
∗ _{R, G, B input signal condition for gray raster mode}
is given by Vsig = 6.0 ± V50 (V)
where: V50 is the signal amplitude which gives 50%
of transmittance in V-T characteristics.
8. Image Retention Time
Apply the monoscope signal to the LCD panel for 60 minutes and then change this signal to the gray scale
of Vsig = 6.0 ± VAC (VAC: 3 to 4V), judging by sight at VAC that hold the maximum image retention, measure
the time till the residual image becomes indistinct.
∗ _{Monoscope signal conditions:}
Vsig = 6.0 ± 4.0 or 6.0 ± 2.0 (V)
(shown in the right figure)
VCOM = 5.85V
4.0V
6.0V
Black level
2.0V
White level
2.0V
4.0V
0V
Vsig waveform
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