LCX020 데이터 시트보기 (PDF) - Sony Semiconductor

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LCX020

1.8cm (0.7-inch) Color LCD Panel

Sony Semiconductor 

LCX020BK

6. Response Time

Response time ton and toff are defined

by formulas (5) and (6) respectively.

ton = t1 – tON ... (5)

toff = t2 – tOFF ... (6)

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.

Input signal voltage (Waveform applied to the measured pixels)

4.5V

7.0V

0.5V

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 (MAC16/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 { AC component } ... (7)

DC component

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

Vsig = 7.0 ± V50 [V]

where: V50 is the signal amplitude which gives 50% of

8. Image Retention Time

transmittance in V-T curve.

Image retention time is given by the following procedures.

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

Vsig = 7.0 ± VAC [V] (VAC: 3 to 4V) so as to give the maximum image retention. Hold input signal VAC. The

time for the residual image to disappear gives the image retention time.

∗ Monoscope signal conditions

Vsig = 7.0 ± 4.5 or 7.0 ± 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

– 14 –

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