JPH0351484U - - Google Patents
Info
- Publication number
- JPH0351484U JPH0351484U JP11260189U JP11260189U JPH0351484U JP H0351484 U JPH0351484 U JP H0351484U JP 11260189 U JP11260189 U JP 11260189U JP 11260189 U JP11260189 U JP 11260189U JP H0351484 U JPH0351484 U JP H0351484U
- Authority
- JP
- Japan
- Prior art keywords
- lcd
- power supply
- circuit
- display circuit
- bias terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Liquid Crystal Display Device Control (AREA)
Description
第１図は本考案の一実施例によるＬＣＤ表示回
路、第２図は従来のＬＣＤ表示回路である。
２……電源、６−２，６−３……リチウム電池
、７……マイクロコンピユーター、８……ＬＣＤ
、９−１，９−２……抵抗、１０……ＬＣＤバイ
アス端子、１１，１３……ツエナーダイオード、
１２……トランジスタ、１６……停電検知回路。
FIG. 1 shows an LCD display circuit according to an embodiment of the present invention, and FIG. 2 shows a conventional LCD display circuit. 2...Power supply, 6-2, 6-3...Lithium battery, 7...Microcomputer, 8...LCD
, 9-1, 9-2... Resistor, 10... LCD bias terminal, 11, 13... Zener diode,
12...Transistor, 16...Power failure detection circuit.
Claims (1)
ー７のＬＣＤバイアス端子１０に電源２を直列回
路で構成した複数の抵抗９−１，９−２で分割し
てＬＣＤバイアス電圧Ｖとして入力し、電源２に
電池回路５を並列に接続したＬＣＤ表示回路にお
いて、ＬＣＤバイアス端子１０、電源２間の抵抗
９−１を他の抵抗９−２に比べ小さな抵抗値とし
、又、ＬＣＤバイアス端子１０、電源２間に停電
検知回路１６を接続したことを特徴とするＬＣＤ
表示回路。 (2) 停電検知回路１６を電源２を入力するトラ
ンジスタ１２とその出力をＬＣＤバイアス端子１
０に接続するツエナーダイオード１１とで構成す
る第１項記載のＬＣＤ表示回路。 (3) 電源２、停電検知回路１６間にツエナーダ
イオード１３を設けた第１項記載のＬＣＤ表示回
路。 (4) 電池回路５をダイオード６−１、１個のリ
チウム電池６−３の直列回路で構成した第１項記
載のＬＣＤ表示回路。[Claims for Utility Model Registration] (1) The LCD bias voltage V is applied to the LCD bias terminal 10 of the microcomputer 7 that drives the LCD 8 by dividing the power supply 2 by a plurality of resistors 9-1 and 9-2 configured in a series circuit. In an LCD display circuit in which the battery circuit 5 is connected in parallel to the power supply 2, the resistance 9-1 between the LCD bias terminal 10 and the power supply 2 is set to a smaller resistance value than the other resistor 9-2, and the LCD An LCD characterized in that a power failure detection circuit 16 is connected between a bias terminal 10 and a power supply 2.
display circuit. (2) The power failure detection circuit 16 is connected to the transistor 12 that inputs the power supply 2 and its output to the LCD bias terminal 1.
2. The LCD display circuit according to claim 1, comprising a Zener diode 11 connected to 0. (3) The LCD display circuit according to item 1, wherein a Zener diode 13 is provided between the power supply 2 and the power failure detection circuit 16. (4) The LCD display circuit according to item 1, wherein the battery circuit 5 is constituted by a series circuit of a diode 6-1 and one lithium battery 6-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11260189U JP2523395Y2 (en) | 1989-09-26 | 1989-09-26 | LCD display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11260189U JP2523395Y2 (en) | 1989-09-26 | 1989-09-26 | LCD display circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0351484U true JPH0351484U (en) | 1991-05-20 |
| JP2523395Y2 JP2523395Y2 (en) | 1997-01-22 |
Family
ID=31661045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11260189U Expired - Lifetime JP2523395Y2 (en) | 1989-09-26 | 1989-09-26 | LCD display circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2523395Y2 (en) |
-
1989
- 1989-09-26 JP JP11260189U patent/JP2523395Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2523395Y2 (en) | 1997-01-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |