Epson S1D10605 Series Manual page 34

S1D10605 Series
V
5
Variable Range
Notch width
* When the V voltage regulator internal resistors or the electronic volume function is used, it is necessary to at least
5
set the voltage regulator circuit and the voltage follower circuit to an operating mode using the power control set
commands. Moreover, it is necessary to provide a voltage from V
* The V terminal is enabled only when the V
R
= LOW). When the V
V terminal is left open.
R
* Because the input impedance of the V
cables, etc. to handle noise.
The Liquid Crystal Voltage Generator Circuit
The V voltage is produced by a resistive voltage divider within the IC, and can be produced at the V
5
voltage levels required for liquid crystal driving. Moreover, when the voltage follower changes the impedance, it
provides V , V , V and V
1 2 3
6 bias for S1D10606 Series, 1/6 bias or 1/5 bias for the S1D10607 Series 1/8 bias or 1/6 bias for S1D10608 Series and
1/8 bias or 1/6 bias for S1D10609 Series can be selected.
High Power Mode
The power supply circuit equipped in the S1D10605 Series chips has very low power consumption (normal mode: HPM
= HIGH). However, for LCDs or panels with large loads, this low-power power supply may cause display quality to
degrade. When this occurs, setting the HPM terminal to LOW (high power mode) can improve the quality of the display.
We recommend that the display be checked on actual equipment to determine whether or not to use this mode.
Moreover, if the improvement to the display is inadequate even after high power mode has been set, then it is necessary
to add a liquid crystal drive power supply externally.
The Internal Power Supply Shutdown Command Sequence
The sequence shown in Figure 16 is recommended for shutting down the internal power supply, first placing the power
supply in power saver mode and then turning the power supply OFF.
Sequence
Step1
Step2
End Internal power supply OFF
32
Min.
–8.7 (63 levels)
voltage regulator internal resistors are not used (i.e. the IRS terminal
5
voltage regulator internal resistors are used (i.e. when the IRS terminal = HIGH), then the
5
terminal is high, it is necessary to take into consideration short leads, shield
R
to the liquid crystal drive circuit. 1/9 bias or 1/7 bias for S1D10605 Series, 1/8 bias or 1/
4
Details
(Command, status)
Display OFF
Display all points ON
Table 15
Typ.
–7.0 (central value) –5.3 (0 level)
53
when the Booster circuit is OFF.
OUT
Command address
D7 D6 D5 D4 D3 D2
1 0 1 0 1 1
1 0 1 0 0 1
Figure 16
EPSON
Max.
1
D1 D0
Power saver
1 0
commands
(compound)
0 1
Units
[V]
[mV]
, V , V , and V
2 3 4
Rev.2.1