– 13 –

LCX018AK

6. Response Time

the formula (5) and (6) respectively.

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.

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.

AC component

F [dB] = 20 log

{

DC component

8. Image Retention Time

Image retention time is given by the following procedures:

Apply monoscope signal to the LCD panel for 60 minutes and then change monoscope signal∗ to gray scale

The time of the residual image to disappear gives the image retention time.

∗ Monoscope signal conditions:

Vsig = 6 ± 4.5 or 6 ± 2.0 [V]

(shown in the right figure)

Vcom = 5.6V

Input signal voltage (waveform applied to the measured pixels)

4.5V

0.5V

6V

0V

Light transmission

output waveform

100%

90%

10%

0%

tON

t1

ton

tOFF

t2

toff

∗ R, G, B input signal condition for gray raster mode is given by

transmittance in V-T curve.

Black level

White level

Vsig waveform

6V

0V

4.5V

2.0V

4.5V

2.0V