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參數(shù)資料
| 型號： | EM6124 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Digitally Programmable 8 to 25 Multiplex LCD Controller & Driver |
| 中文描述： | 數(shù)字可編程8至25多路LCD控制器 |
| 文件頁數(shù)： | 7/23頁 |
| 文件大?。?/td> | 1900K |
| 代理商： | EM6124 |
EM6124
7
Temperature Control
Due to the tem per a ure de pend ency of liq uid cristals vis
cos ty the LCD con rol ing volt age V
LCD
must be in creased
for lower tem per a ures to main ain op i mal con rast. The
EM6124 is avail able with 4 dif er ent tem per a ure co ef i
cients (see Fig. 9). The co ef i cient is se ected by 2 bits in
the ini ial za ion code TC bits 10 and 11. Ta ble 11 shows
the typ cal val ues of the dif er ent tem per a ure co ef i cients.
They are pro por ional to the pro grammed V
LCD
.
Typical Values of the Tem per a ure Co ef i cients
Bit 10, Bit 11
Value
0 0
+0.18 x V
LCD
0 1
- 0.27 x V
LCD
1 0
-1 x V
LCD
1 1
-1.7 x V
LCD
Unit
mV/°C
mV/°C
mV/°C
mV/°C
Ta ble 11
Checker and Checker Inverse
A fast check dis play can be eas ly cre ated set ing
initialization bits 12 and 13 (called “Checker” and “Inv.
Checker”). The dis play is com pletely checked with only 2
ini ial za ion se quences, one “Checker” and one “Inv.
Checker”. For Checker, the pat ern fills the dis play with al
ter nately ON and OFF pix els as shown in Fig. 10. For Inv.
Checker, ev ery hing is in verted (see Fig.18.14 and 18.15).
Pat ern of Checker Mode
Typical V
LCD
Programming
Temperature Coefficients
Fig. 9
Fig. 8
Fig. 10
Internally Generated V
LCD
versus Temperature
Fig. 11
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