LCX007BNB
5. 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∗1 mode are measured by a DC voltmeter and a spectrum analyzer in
System II.
{ } AC component
F [dB] = 20 log
... (7)
DC component
∗1 Each input signal condition for gray raster mode is given by
Vsig = 7.0 ± V50 [V]
where: V50 is the signal amplitude which gives 50% of
transmittance in V-T characteristics.
6. Image Retention Time
Image Retention time is given by following procedures.
Apply the monoscope signal to the LCD panel for 60 minutes and then change this signal to the gray scale of
Vsig = 7.0 ± VAC (VAC: 3 to 4V). Hold VAC that maximizes image retention judging by sight. Measure the time
till the residual image becomes indistinct.
∗ Monoscope signal conditions:
Vsig = 7.0 ± 4.5 or ± 2.0 [V]
(shown in the right figure)
Vcom = 6.6V
4.5V
7.0V
Black level
2.0V
White level
2.0V
4.5V
0V
Vsig waveform
7. Cross talk
Cross talk is determined by the luminance differences between adjacent areas represented Wi' and Wi (i = 1
to 4) around black window (Vsig = 4.5V/1V).
W1 W1'
W2
W2'
W4
Cross talk CTK =
Wi' – Wi
Wi
× 100 [%]
W4'
W3 W3'
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