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參數(shù)資料
| 型號： | HM17CM4096 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 128XRGBX162 OUTPUT LCD DRIVER IC with built-in RAM |
| 中文描述： | 128XRGBX162輸出LCD驅(qū)動器內(nèi)置內(nèi)存 |
| 文件頁數(shù)： | 37/67頁 |
| 文件大?。?/td> | 1117K |
| 代理商： | HM17CM4096 |
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HM17CM4096
- 37 -
(18) LCD DRIVER CIRCUIT
This drive circuit generates four levels of LCD drive voltage. The circuit has 384 segment outputs
and 162 common outputs and outputs combined display data and FR signal.
The common drive circuit that has shift register and outputs common scan signals sequentially.
(19) OSCILLATOR CIRCUIT
HM17CM4096
has the CR oscillator. The output of oscillator is used as the timing signal source of
display and boosting clock to the booster.
If external clock is used, feed the clock to OSC
1
pin or connect resistor between OSC
1
and OSC
2
.
And feedback resistance with command can set the inner oscillator circuit of
HM17CM4096.
The frame frequency can be altered by changed oscillator frequency according to feedback
resistance length set value. To get optimum frame frequency, please check LCD and then set the
frequency of oscillator.
(20) POWER SUPPLY CIRCUIT
This block generates the voltages necessary for driving LCD panel. The power supply circuit
consists of voltage boosting circuit and voltage converting circuit and generates the voltages (V
LCD
,
V
1
, V
2
, V
3
, V
4
. ) for LCD driving.
For large panel driving, it’s preferable to use external voltage source rather than to use built-in
power supply circuit for good image quality.
When using external voltage source, disable the built-in power supply circuit(AMPON, DCON=‘00’),
supply the V
LCD
, V
1
, V
2
, V
3
, V
4
and V
OUT
externally and open the C
1
+, C
1
-, C
2
+, C
2
-, C
3
+, C
3
-, C
4
+, C
4
-,
C
5
+, C
5
-, C
6
+, C
6
-, V
REF
, V
REG
, V
EE
terminals.
According to power supply circuit control command input, the power supply circuit can be enabled
partially. External power supply and partial inner power circuit can be used together. Refer to the
next table.
DCON
0
0
1
AMPON
0
1
1
Boosting circuit
Disable
Disable
Enable
Converting circuit
disable
enable
enable
External voltage input
V
OUT
, V
LCD
, V
1
, V
2
, V
3
, V
4
common
V
OUT
common
remark
y
1,3
y
2,3
y
1. All the built-in boosting circuit, converting circuit is not used. Open the ,C
1
+, C
1
-, C
2
+, C
2
-, C
3
+, C
3
-, C
4
+,
C
4
-, C
5
+, C
5
-, C
6
+, C
6
-, V
REF
, V
REG
, V
EE
terminals, LCD driving voltage should be applied externally.
2.Only the Boosting circuit is not used. Open the C
1
+,C
1
-,C
2
+,C
2
-,C
3
+,C
3
-,C
4
+,C
4
-,C
5
+,C
5
-,C
6
+,C
6
-, V
OUT
terminals, The power for converting circuit must be supplied through V
OUT
terminal and the reference
voltage must be supplied by V
REF
terminal.
3.The conditions between V
OUT
, V
LCD
, V
1
, V
2
, V
3
, and V
4
are V
OUT
≥
V
LCD
≥
V
1
≥
V
2
≥
V
3
≥
V
4
≥
V
SS
.
t
t
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