CHAPTER 3 LCD CONTROLLER/DRIVER
User’s Manual U18438EJ2V0UD
48
3.9.2 External resistance division method
It is also possible to use external voltage divider resistors for generating LCD drive power supplies, without using
internal resistors. Figure 3-26 shows examples of LCD drive voltage connection, corresponding to each bias method.
Figure 3-26. Examples of LCD Drive Power Connections (External Resistance Division Method)
(a) Static display mode
(
V
LCD
= V
LC0
= V
LC1
= V
LC2
)
(b) Static display mode
(
V
LC1
= V
LC2
= LV
SS
= GND
)
LV
SS
V
LC0
V
LCD
V
LC1
V
LC2
LV
SS
V
LC0
V
LCD
V
LC1
V
LC2
(c) 1/2 bias method
(d) 1/3 bias method
R
LV
SS
R
V
LC0
V
LCD
V
LC1
V
LC2
R
LV
SS
R
R
V
LC0
V
LCD
V
LC1
V
LC2
Remark
Both (a) and (b) connection can be used in the static display mode.