LCX024AK 데이터 시트보기 (PDF) - Sony Semiconductor

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LCX024AK

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

Sony Semiconductor 

LCX024AK

3. RGB Simultaneous Sampling

Horizontal driver samples R, G and B signal simultaneously, which requires the phase matching between R,

G and B signals to prevent horizontal resolution from deteriorating. Thus phase matching between each

signal is required using an external signal delaying circuit before applying video signal to the LCD panel.

Two methods are applied for the delaying procedure: Sample and hold and Delay circuit. These two block

diagrams are as follows.

The LCX024AK has the right/left inverse function. The following phase relationship diagram indicates the

phase setting for the right scan (RGT = High level). For the left scan (RGT = Low level), the phase setting

shall be inverted between B and G signals.

(1) Sample and hold (right scan)

B

S/H

S/H

AC Amp

CKB

R

S/H

CKG

S/H

AC Amp

CKR

CKG

G

S/H

AC Amp

CKG

<Phase relationship of delaying sample-and-hold pulses> (right scan)

HCKn

4 BLUE

3 RED

2 GREEN

CKB

CKR

CKG

(2) Delay circuit (right scan)

B

Delay

Delay

AC Amp

4 BLUE

R

Delay

AC Amp

3 RED

G

AC Amp

2 GREEN

– 18 –

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