S1D10605 Epson Electronics America, Inc., S1D10605 Datasheet - Page 96

• Manufacturer Part Number: S1D10605
• Description: S1d15000 Series Lcd Driver With Ram
• Manufacturer: Epson Electronics America, Inc.

S1D15206 Series
Common timing Signals
The common timing generator circuit uses the display clock to
generate common timing signal and FR frame signal. The Duty
Select command can select 1/8 or 1/16 duty (S1D15206). A
combination of Select Duty and Duty+1 commands can select 1/9 or
1/17 duty (S1D15206).
Display Data Latch Circuit
This circuit temporarily stores (or latches) display data (during a
single common signal period) when it is output from display RAM
to LCD panel driver circuit. This latch is controlled by Display ON/
OFF and Static Drive ON/OFF commands. These commands do not
alter the data.
LCD Driver
This is a multiplexer circuit consisting of 96 segment outputs to
generate four-level LCD panel drive signals. The circuit also has a
pair of COM outputs for indicator display.
The COMn output has a shift register to sequentially output COM
scan signals. The LCD panel drive voltage is generated by a specific
combination of display data, COM scan signal, and FR signal.
Figure 6 gives an example of SEG and COM output waveforms.
Oscillation Circuit
This is a low power consumption CR oscillator having an oscillator
resistor, and its output is used as the display timing signal source or
as the clock for voltage boost circuit of LCD power supply.
The display clock output can be stopped by Clock Stop command to
minimize the current consumption of LCD panel.
4–12
• Dual-frame AC driver waveforms
(If S1D15206 is used in 1/16 duty)
Display clock
FR
COM0
COM1
RAM data
SEGn
V
V
V
V
V
V
V
V
V
V
V
V
1
4
5
1
4
5
2
3
5
DD
DD
DD
15
16
1
2
3
4
EPSON
5
6
Power Supply Circuit
The power supply circuit produces voltage to drive LCD panel at low
power consumption. The power circuit consists of three subcircuits:
voltage tripler, voltage regulator, and voltage follower. The voltage
tripler outputs V
regulator circuit generates V
voltage follower circuit changes the impedance of V
generated from V
are explained later.)
S1D15206 series can drive LCD panel using on-chip power circuit.
However, the on-chip power circuit is intended to use for a small
LCD panel and it is inappropriate to a large panel requiring multiple
driver chips. As the large LCD panel has the dropped display quality
due to large load capacity, it must use an external power source.
The power circuit is controlled by Set Power Control command.
This command sets a three-bit data in Power Control register to
select one of eight power circuit functions. The external power
supply and part of on-chip power circuit functions can be used
simultaneously. The following explains how the Set Power Control
command works.
11
12
DD
5
through division with internal resistors. (Details
13
-(V
SS
14
2) or -(V
5
voltage using external resistor. The
15
16
SS
3) voltage at V
1
2
1
to V
OUT
Rev.3.5
4
that are
. The