LCX007BKA データシートの表示（PDF） - Sony Semiconductor

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LCX007BKA

3.4cm (1.35-inch) Color LCD Panel

Sony Semiconductor 

LCX007BKA

6. Response Time

Response time 'ton' and 'toff' are defined by

the formula (5) and (6) respectively.

Input signal voltage (waveform applied to the measured pixels)

ton = t1 – tON ... (5)

toff = t2 – tOFF ... (6)

4.5V

7.0V

0.5V

t1: time which gives 10% transmittance of 0V

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.

Light transmission 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.

{ } AC component

F [dB] = 20 log

... (7)

DC component

∗ Each input signal condition for gray raster mode is given by

Vsig = 7.0 ± V50 [V]

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

transmittance in V-T characteristics.

8. Image Retention Time

Image Retention time is given by following procedures.

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

of Vsig = 7.0 ± VAC (VAC: 3 to 4V). Hold VAC that maximizes image retention judging by sight. 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

4.5V

7.0V

Black level

2.0V

White level

2.0V

4.5V

0V

Vsig waveform

– 13 –

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