LCX024AK 데이터 시트보기 (PDF) - Sony Semiconductor

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LCX024AK

1.4cm (0.55-inch) NTSC/PAL Color LCD Panel

Sony Semiconductor 

LCX024AK

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)

4.5V

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 ...(7)

DC component

∗ 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 ± 4.5 or 6 ± 2.0 (V)

(shown in the right figure)

VCOM = 5.7V

4.5V

6.0V

Black level

2.0V

White level

2.0V

4.5V

0V

Vsig waveform

– 14 –

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