OM6206 NXP Semiconductors, OM6206 Datasheet - Page 16

• Manufacturer Part Number: OM6206
• Description: 65 X 102 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 5 LCD bias voltage
8.9
Due to the temperature dependency of the liquid crystals viscosity the LCD controlling voltage V
with lower temperature to maintain optimal contrast. There are four temperature coefficients available in the OM6206
(see Fig.13). The coefficients are selected by the two bits TC
temperature coefficients. The coefficients are proportional to the programmed V
2001 Nov 14
65
(1) TC0.
(2) TC1.
(3) TC2.
(4) TC3.
SYMBOL
Temperature control
102 pixels matrix LCD driver
V1
V2
V3
V4
V5
V6
V
V
LCD
SS
handbook, halfpage
V LCD
(V)
Fig.13 Temperature coefficients behaviour.
BIAS VOLTAGES
n
------------ -
n
n
------------ -
n
------------ -
n
------------ -
n
+
+
+
+
2
+
1
+
3
4
2
4
4
4
16
T cut
1
and TC
0
. Table 6 shows the typical values of the
V
V
LCD
SS
MGT871
T ( C)
BIAS VOLTAGE FOR
LCD
(1)
(2)
(3)
(4)
at reference temperature.
8
7
2
1
9
9
9
9
V
V
V
V
LCD
LCD
LCD
LCD
LCD
Product specification
must be increased
1
OM6206
9
BIAS