S1D15E06 Series
6.6.3 Liquid crystal drive voltage generation circuit
Voltage VC is boosting in the IC to generate potential V3. Furthermore, voltages V3 and VC are converted by resistive
divider to produce V2, V1, MV1 and MV2 voltages. V2, V2, MV1 and MV2 voltages are impedance-converted by the
voltage follower, and is supplied to the liquid crystal drive circuit.
V2
V1
VC
MV1
MV2
11/14 • V3
9/14 • V3
7/14 • V3
5/14 • V3
3/14 • V3
An example of circuit around the power supply circuit
1Use of all built-in power supplies
When used by switching between the double boosting
and VOUT = VDD: (11 C’s)
When used by switching between the triple, double
boosting and VOUT = VDD: (12 C’s)
+
+
CAP1+
CAP1–
CAP1+
CAP1–
C1
C1
CAP2–
CAP2+
CAP2–
CAP2+
C1
+
+
+
V
V
OUT
DD
V
V
OUT
DD
C1
C1
+
+
V
V
DD
SS
V
V
DD
SS
C1
C1
+
+
+
+
CAP3+
CAP3–
CAP4–
CAP4+
CAP3+
CAP3–
CAP4–
CAP4+
C1
C1
C1
C1
CPP+
CPP–
CPM+
CPM–
CPP+
CPP–
CPM+
CPM–
+
+
+
+
+
+
+
+
+
+
+
+
V
V
V
V
MV
MV
MV
3
2
1
C
V
V
V
V
MV
MV
MV
3
2
1
C
C3 × 6
C3 × 6
1
2
3
1
2
3
(VSS
)
(VSS)
24
EPSON
Rev. 2.1
EPSON [ EPSON COMPANY ]
