PCF8533 Просмотр технического описания (PDF) - Philips Electronics

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производитель

PCF8533

Universal LCD driver for low multiplex rates

Philips Electronics 

Philips Semiconductors

Universal LCD driver for low multiplex rates

Product specification

PCF8533

handbook, full pagewidth

BP0

BP1

Sn

Sn + 1

state 1

state 2

VLCD

2VLCD/3

VLCD/3

VSS

VLCD

2VLCD/3

VLCD/3

VSS

VLCD

2VLCD/3

VLCD/3

VSS

VLCD

2VLCD/3

VLCD/3

VSS

VLCD

2VLCD/3

VLCD/3

0V

−VLCD/3

−2VLCD/3

−VLCD

VLCD

2VLCD/3

VLCD/3

0V

−VLCD/3

−2VLCD/3

−VLCD

Tframe

LCD segments

state 1

state 2

(a) Waveforms at driver.

(b) Resultant waveforms

at LCD segment.

MGL747

Vstate1(t) = Vsn(t) − VBP0(t).

Von(rms) = 0.745VLCD.

Vstate2(t) = Vsn(t) − VBP1(t).

Voff(rms) = 0.333VLCD.

Fig.5 Waveforms for the 1 : 2 multiplex drive mode with 1⁄3bias.

6.4.3 1 : 3 MULTIPLEX DRIVE MODE

When three backplanes are provided in the LCD, the 1 : 3 multiplex drive mode applies, as shown in Fig.6.

1999 Jul 30

10

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