S1D15605D11B Epson Company, S1D15605D11B Datasheet - Page 46
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S1D15605D11B
Manufacturer Part Number
S1D15605D11B
Description
Single-chip dot matrix liquid crystal display drivers
Manufacturer
Epson Company
Datasheet
1.S1D15605D11B.pdf
(87 pages)
- Current page: 46 of 87
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S1D15605 Series
* When the V
* The V
* Because the input impedance of the V
The Liquid Crystal Voltage Generator Circuit
The V
divider within the IC, and can be produced at the V
V
driving. Moreover, when the voltage follower changes
the impedance, it provides V
liquid crystal drive circuit. 1/9 bias or 1/7 bias for
S1D15605 Series, 1/8 bias or 1/6 bias for S1D15606
Series, 1/6 bias or 1/5 bias for the S1D15607 Series, 1/
8 bias or 1/6 bias for S1D15608 Series and 1/8 bias or
1/6 bias for S1D15609 Series can be selected.
8–44
3
the electronic volume function is used, it is necessary
to at least 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
Booster circuit is OFF.
regulator internal resistors are not uesd (i.e. the IRS
terminal = LOW). When the V
internal resistors are uesd (i.e. when the IRS terminal
= HIGH), then the V
high, it is necessary to take into consideration short
leads, shield cables, etc. to handle noise.
, and V
5
R
voltage is produced by a resistive voltage
4
terminal is enabled only when the V
voltage levels required for liquid crystal
Sequence
Step1
Step2
End
5
voltage regulator internal resistors or
R
Internal power supply OFF
terminal is left open.
Display all points ON
(Command, status)
1
Display OFF
, V
Details
2
5
, V
voltage regulator
3
and V
OUT
R
terminal is
when the
5
4
voltage
to the
1
, V
D7
1
1
2
Figure 22
EPSON
,
D6
0
0
Command address
D5
1
1
High Power Mode
The power supply circuit equipped in the S1D15605
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 22 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.
D4
0
0
D3
1
0
D2
1
1
D1
1
0
D0
0
1
Power saver
commands
(compound)
Rev. 2.4a
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