HD66760 Datasheet, PDF (76/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

HD66760
Temperature can be compensated either through the CT bits, by controlling the reference input voltage for the
VLCD regulator (VREG pin) using a thermistor, or by controlling the reference output voltage of the VLCD
regulator (V1REF pin).
Vcc
VRaj
Ra
Rth
Thermistor
GND
Vci
Tr
VREG
Rb
0.1µF
(B characteristics)
V1REF
VLREF
1/2 Vci Voltage
Dividing
VLCD
Regulator
GND
VR
VLREF regulator
V1OUT
R
V2OUT
R
V3OUT
R0
V4OUT
R
V5OUT
GND
R
HD66760
PS = "10"
VLPS
V1
V2
V3
LCD
Driver
V4
V5
SEG1 to SEG312
COM1 to COM80
GND
Figure 51 Temperature Compensation Circuits (1)
VRaj
Ra
Rth
Thermistor
Tr
Rb
Vcc or GND
Vci
VREG
1/2 Vci Voltage
Dividing
V1REF
0.1µF
(B characteristics)
VLCD
Regulator
GND
VLREF
VR
VLREF regulator
V1OUT
R
V2OUT
R
V3OUT
R0
V4OUT
R
V5OUT
GND
R
HD66760
PS = "01"
VLPS
V1
V2
V3
LCD
Driver
V4
V5
SEG1 to SEG312
COM1 to COM80
GND
Figure 52 Temperature Compensation Circuits (2)