LM641521 datasheet(10/20 Pages) SHARP

10 / 20 page

No.

Driving

tic. shows the block

of the

circaitrr.

2 Display Face Configuration

The display face electrically consists of txo

and

so that the unit

offer higher contrast

reducing drive

ratio.

display

is driven

duty ratio.

3 Input Data

Control Signal

The LCD driver is

bits

LCD driver circuits.

consisting of shift registers, latch circnits and

data

are externally divided into data for each

be sequentially transferred in the

of I-bit parallel data through shift

registers

Clock

the left top of the display face.

data

oae row

have been input,

will be latched in the form

of parallel data for 640 lines of

latch

Thea the

corresponding drive signal will be

to the 640 liars of

electro-

des of the LCD

panel the LCD drive circuits.

At this tire, scan start-or

been transferred

the scan

driver to the 1st row

electrodes, and

of the data signals are

oa the

half of

display face according to

the combinations of voltages

scan and

electrodes of the LCD.

the 1st ron of data

displayed, the 2nd

of data are

640 dots of

transferred thaa latched

falling

clock, t&e

face proceeds to the 2nd

of display.

drtr

to the 240th row of

display

to lower

of display

Then

data

proceeds to the next

face.

Scan start-w

generates

drive horizontal electrodes.

DC voltage, if applied to LCD panel, causes chemical reaction

deteriorate LCD panel,

inverted

prevent the generation of such DC voltage. Control

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