LCX029CRT Просмотр технического описания (PDF) - Sony Semiconductor

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производитель

LCX029CRT

2.3cm (0.9 Type) Black-and-White LCD Panel

Sony Semiconductor 

LCX029CRT

5. Flicker

Flicker (F) is given by formula (5). DC and AC (XGA/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

...(5)

DC component

∗ Each input signal voltage for gray raster mode

is given by Vsig = 7.5 ± V50 [V]

where: V50 is the signal amplitude which gives

50% of transmittance in V-T characteristics.

6. 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 = 7.5 ± VAC (VAC: 3 to 4V). Judging by sight at the VAC that holds the maximum image retention,

measure the time till the residual image becomes indistinct.

∗ Monoscope signal conditions:

Vsig = 7.5 ± 5.0 or ± 2.0 [V]

(shown in the right figure)

Vcom = 7.1V

5.0V

7.5V

Black level

2.0V

White level

2.0V

5.0V

0V

Vsig waveform

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 = 5.0V/1V).

W2 W1 W1'

W4

W2'

W4'

Cross talk value CTK = Wi' – Wi × 100 [%]

Wi

W3 W3'

– 15 –

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