PCF2119X_11 Datasheet, PDF (13/83 Pages) NXP Semiconductors – LCD controllers/drivers Single-chip LCD controller and driver

NXP Semiconductors
PCF2119x
LCD controllers/drivers
V_on(RMS) and V_off(RMS) are properties of the display driver and are affected by the selection
of a, n (see Equation 3 to Equation 5) and the V_LCD voltage.
V_low and V_high are properties of the LCD liquid and can be provided by the module
manufacturer.
It is important to match the module properties to those of the driver in order to achieve
optimum performance.
100 %
90 %
10 %
V_low
V_high
V_RMS [V]
OFF
SEGMENT
GREY
SEGMENT
ON
SEGMENT
001aam358
Fig 3. Electro-optical characteristic: relative transmission curve of the liquid
8.6 LCD row and column drivers
The PCF2119x contains 18 row and 80 column drivers, which drive the appropriate LCD
bias voltages in sequence to the display in accordance with the data to be displayed. R17
and R18 drive the icon rows. Unused outputs should be left open.
The bias voltages and the timing are selected automatically when the number of lines in
the display is selected. Figure 4 to Figure 6 show typical waveforms.
PCF2119X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 9 — 14 April 2011
© NXP B.V. 2011. All rights reserved.
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