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LCX038AST

Input Signals

to use. In this case, use the voltage of which has maximum contrast as typical value.

When the typical value is lowered, the maximum and minimum values may lower.

which is symmetrical to VVC. PSIG wave form is 2 steps like below, in the upper chart, upper shows signal

level of the 1st step, lower shows signal level of the 2nd step. Also, the rising and falling of PSIG are

synchronized with the rising of PCG pulse, and the rise time trPSIG and fall time tfPSIG are suppressed

within 450ns (as shown in a diagram below).

The optimum input voltage of PSIG may be changed according as drive conditions of the drive side.

Level Conversion Circuit

The LCX038AST has a built-in level conversion circuit in the clock input unit on the panel. The input signal

trPSIG

tfPSIG

VVC

PSIG

PCG

90%

10%

PsigG

PsigB

Input waveform of uniformity improvement signal PSIG

Item

H shift register input voltage

HST, HCK1, HCK2, RGT

(Low)

(High)

(Low)

(High)

VHIL

VHIH

VVIL

VVIH

VVC

Vsig

Vcom

VpsigB

VpsigG

–0.5

4.5

–0.5

4.5

7.4

VVC – 5.0

VVC – 0.5

VVC ± 4.9

VVC ± 1.8

0.0

5.0

0.0

5.0

7.5

7.0

VVC – 0.4

VVC ± 5.0

VVC ± 1.9

0.4

5.5

0.4

5.5

7.6

VVC + 5.0

VVC – 0.3

VVC ± 5.1

VVC ± 2.0

V

V

V

V

V

V

V

V

V shift register input voltage

HB, VB, BLK, VST, VCK,

PCG, ENB, DWN

Video signal center voltage

Uniformity improvement signal

Symbol

Min.

Typ.

Max.

Unit