PCF8562 查看數據表（PDF） - Philips Electronics

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PCF8562

Universal LCD driver for low multiplex rates

Philips Electronics 

Philips Semiconductors

Universal LCD driver

for low multiplex rates

Preliminary specification

PCF8562

6.4 LCD drive mode waveforms

6.4.1 STATIC DRIVE MODE

The static LCD drive mode is used when a single backplane is provided in the LCD. The backplane (BPn) and segment

drive (Sn) waveforms for this mode are shown in Fig.5.

ull pagewidth

Tframe

VLCD

LCD segments

BP0

VSS

VLCD

Sn

state 1

(on)

state 2

(off)

VSS

Sn + 1

VLCD

VSS

(a) Waveforms at driver.

VLCD

state 1 0 V

−VLCD

VLCD

state 2

0V

Vstate1(t)

=

V

S

(t)

n

–

VBP0(t)

Von(rms) = VLCD

Vstate2(t)

=

VSn

+

(t)

1

–

VBP0(t)

Voff(rms) = 0 V

−VLCD

(b) Resultant waveforms

at LCD segment.

MGL745

Fig.5 Static drive mode waveforms.

November 22, 2004

10

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