参数资料
型号: EPL43102
英文描述: Graphic STN LCD Drivers with Built-in RAM
中文描述: 图形STN液晶显示器驱动器,内置内存
文件页数: 25/64页
文件大小: 280K
代理商: EPL43102
43 COM / 102 SEG LCD DRIVER
The information in this document is subject to change without notice.
26
In case of using internal resistors, Ra and Rb. (IRS = "H")
When IRS pin is “ H” , resistor Ra is connected internally between VR pin and VSS, and
Rb is connected between V0 and VR. We determine V0 by two instructions, "Regulator
Resistor Select" and "Set Reference Voltage".
In case of using external resistors, Ra and Rb. ( IRS = "L" )
When IRS pin is “ L” , it is necessary to connect external regulator resistor Ra between
VR and VSS, and Rb between V0 and VR.
For a particular liquid, the optimum VLCD can be calculated for a given multiplex rate.
For duty ratio is 1/43, the optimum operating voltage of the liquid can be calculated as:
th
LCD
V
×
=
×
×
+
=
805
.
5
43
1
2
43
1
where Vth is the threshold voltage of the liquid crystal material used.
Voltage follower circuits
Figure 17
Switching
Network
0.890xV0
0.880xV0
0.110xV0
0.120xV0
FROM VOLTAGE
REGULATOR
OP TYPE VOLTAGE FOLLOWER
V0
V1
V2
V3
V4
Total Req = 4M
BYPASS CAPACITOR = 0.47uF~1uF
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