– 13 –

LCX016AL

5. Flicker

Flicker (F) is given by formula (7). DC and AC (MAC17/SVGA/VGA/PC98/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

{

DC component

6. Image Retention Time

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

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

7. Cross Talk

Cross talk is determined by the luminance differences between adjacent areas represented by Wi' and

Wi (i = 1 to 4) around a black window (Vsig = 4.5 V/1V).

Cross talk value CTK =

× 100 [%]

∗ Each input signal voltage for gray raster mode

50% of transmittance in V-T characteristics.

Black level

White level

Vsig waveform

7.0V

0V

4.5V

2.0V

4.5V

2.0V

W2

W2

'

W4

'

W4

Wi' – Wi

Wi