JP2966423B2 - Electronic pointing device - Google Patents
Electronic pointing deviceInfo
- Publication number
- JP2966423B2 JP2966423B2 JP63320030A JP32003088A JP2966423B2 JP 2966423 B2 JP2966423 B2 JP 2966423B2 JP 63320030 A JP63320030 A JP 63320030A JP 32003088 A JP32003088 A JP 32003088A JP 2966423 B2 JP2966423 B2 JP 2966423B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- semiconductor switch
- voltage
- amplifier
- signal
- 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.)
- Expired - Fee Related
Links
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Audible And Visible Signals (AREA)
- Emergency Alarm Devices (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は自動車等に積載される電子式指示装置の一灯
断線を検出して指示灯の点滅周期を変化させて断線した
ことを知らせる警報機能をもった指示駆動装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention detects a disconnection of one light of an electronic indicating device mounted on an automobile or the like, and changes the blinking cycle of the indicating lamp to notify the disconnection. The present invention relates to an instruction driving device having a function.
（従来の技術） 第３図はこの種の指示装置の従来回路図でａが機械式
接点リレー、Ｅがバッテリー、Ｇが指示灯（ランプ）、
ｈが負荷電流検出抵抗である。この動作はまずスイッチ
端子に接続されると指示灯ｇを介してバッテリーＥによ
って電源回路が立ち上がる。次に発振回路により、ある
周期で機械式接点リレーａのトリガ信号が与えられ、機
械式接点リレーａがオン・オフし指示灯ｇが点滅する。
次に何らかの原因で指示灯が一灯断線したとき、機械式
接点リレーａと直列に接続された負荷電流検出抵抗ｈに
より、その抵抗に流れる電流を検出回路にて検出し、発
振回路に信号を与えて機械式接点リレーａのオン・オフ
すなわち指示灯の点滅周期を変えて一灯断線を警報す
る。(Prior Art) FIG. 3 is a conventional circuit diagram of this type of indicating device, wherein a is a mechanical contact relay, E is a battery, G is an indicating lamp,
h is a load current detection resistor. In this operation, when the battery is connected to the switch terminal, the power supply circuit is started up by the battery E via the indicator light g. Next, a trigger signal of the mechanical contact relay a is given by the oscillation circuit at a certain cycle, the mechanical contact relay a is turned on / off, and the indicator light g blinks.
Next, when one of the indicator lamps is disconnected for some reason, the load current detection resistor h connected in series with the mechanical contact relay a detects the current flowing through the resistor with a detection circuit, and sends a signal to the oscillation circuit. Then, the ON / OFF state of the mechanical contact relay a, that is, the blinking cycle of the indicator light is changed to warn of the disconnection of one light.
しかしこの検出では負荷電流の増大にともない電流の流
れている間、バッテリー電圧が低下してしまい、その結
果バッテリーでのリップル電圧が大きくなり、指示灯へ
の信頼性が低下してしまうという欠点があった。しかも
機械式接点リレーであるので寿命が短かく接触不良等信
頼性に問題があった。However, this detection has the disadvantage that the battery voltage decreases while the load current increases and the battery voltage decreases, resulting in an increase in the ripple voltage of the battery and a decrease in the reliability of the indicator lamp. there were. In addition, since it is a mechanical contact relay, it has a short life and has a problem in reliability such as poor contact.
（発明の目的） 本発明は、バッテリーでのリップル電圧をおさえ、電
流の流れを均一にすると同時に、高い寿命で信頼性の高
い指示装置を提供するものである。(Object of the Invention) The present invention is to provide a highly reliable indicating device having a long service life while suppressing a ripple voltage in a battery and making a current flow uniform.
（課題を解決するための手段） 本発明は２つの半導体スイッチにより、ランプそれぞ
れのON、OFFを反転させ、片側がONの時は片側をOFF、片
側がOFFの時はもう片側をONにすることによりバッテリ
ーでのリップル電圧をおさえ、電流の流れを均一にし
た。(Means for Solving the Problems) In the present invention, the ON / OFF of each lamp is inverted by two semiconductor switches, and when one side is ON, one side is OFF, and when one side is OFF, the other side is ON. As a result, the ripple voltage in the battery was suppressed, and the current flow was made uniform.
第１図は本発明の基本回路図でありＡは電源回路、Ｂ
は発振回路、Ｃは半導体スイッチの電圧降下の差を検出
する検出回路、Ｉは発振回路Ｂを反転する反転回路、Ｄ
は第１の半導体スイッチ、Ｊは第２の半導体スイッチ、
Ｅはバッテリー、Ｆ、Ｇは指示灯、SWはスイッチであ
る。この回路動作はスイッチSWがＦ及びＧに接続される
と指示灯Ｆ及びＧを介してバッテリーＥにより電源回路
Ａが立上がる。FIG. 1 is a basic circuit diagram of the present invention.
Is an oscillation circuit, C is a detection circuit for detecting a difference in voltage drop of the semiconductor switch, I is an inversion circuit for inverting the oscillation circuit B, and D is an inversion circuit.
Is a first semiconductor switch, J is a second semiconductor switch,
E is a battery, F and G are indicator lights, and SW is a switch. In this circuit operation, when the switch SW is connected to F and G, the power supply circuit A is started by the battery E via the indicator lights F and G.
次に発振回路Ｂによりある周期で第１の半導体スイッ
チＤのゲート信号が与えられ第１の半導体スイッチＤが
オン・オフし指示灯Ｇが点滅する。また反転回路Ｉによ
り発振回路Ｂから得られるオン・オフ信号が反転された
信号が同様に第２の半導体スイッチＪに与えられ第２の
半導体スイッチＪがオン・オフし指示灯Ｆが点滅する。Next, the gate signal of the first semiconductor switch D is given by the oscillation circuit B at a certain cycle, the first semiconductor switch D is turned on / off, and the indicator light G blinks. A signal obtained by inverting the on / off signal obtained from the oscillation circuit B by the inverting circuit I is similarly supplied to the second semiconductor switch J, and the second semiconductor switch J is turned on / off and the indicator light F blinks.
ここで第１の半導体スイッチＤがオンしている時のＤ
の両端電圧をV1とする。次に何らかの原因で指示灯Ｇの
一灯が断線した場合に負荷電流が小さくなるため第１の
半導体スイッチＤのオン時の両端電圧が大きくなり、そ
の時の電圧をV2とするとその差電圧（V1−V2）を検出回
路Ｃにて検出し、発振回路Ｂに断線信号を与えて、第１
の半導体スイッチＤのオン・オフすなわち指示灯Ｇの点
滅周期を変化させて一灯断線を警報するものである。第
２の半導体スイッチＪについても同様にオン電圧をV3と
し指示灯Ｆの一灯が断線したときの第２の半導体スイッ
チJ1のオン電圧をV4とするとその差電圧（V3−V4）を検
出回路Ｃにて検出し、発振回路Ｂに断線信号を与え反転
回路Ｉを介して第２の半導体スイッチＪのオン・オフす
なわち指示灯Ｆの点滅周期を変化させ、一灯断線を警報
する。Here, when the first semiconductor switch D is on, D
The voltage between both ends is V1. Next, when one of the indicator lamps G is disconnected for some reason, the load current is reduced, so that the voltage across the first semiconductor switch D when it is turned on increases. If the voltage at that time is V2, the difference voltage (V1 −V2) is detected by the detection circuit C, and a disconnection signal is given to the oscillation circuit B, and the first
The on / off state of the semiconductor switch D, that is, the blinking cycle of the indicator light G is changed to warn of disconnection of one light. Similarly, if the ON voltage of the second semiconductor switch J is V3 and the ON voltage of the second semiconductor switch J1 is V4 when one of the indicator lamps F is disconnected, the difference voltage (V3-V4) is detected. At C, a disconnection signal is supplied to the oscillation circuit B, and the ON / OFF of the second semiconductor switch J, that is, the blinking cycle of the indicator lamp F is changed via the inverting circuit I to warn of the disconnection of one lamp.
次に本発明の具体的回路について第２図（結線図）を
用いて説明する。Next, a specific circuit of the present invention will be described with reference to FIG. 2 (connection diagram).
１〜６が電源回路Ａ、７〜14が発振回路Ｂ、15〜26が
検出回路Ｃ、27〜30が反転回路Ｉ、32が第１の半導体ス
イッチＤ、33が第２の半導体スイッチＪ、34がバッテリ
ーＥ、35が指示灯Ｆ、36が指示灯Ｇ、37がSWに相当す
る。以下動作について説明する。先ずスイッチ37が閉じ
指示灯35、36が接続されると指示灯35, 36を介してダイオード1,2及びコンデンサ３、バッテリ
ー34によりコンデンサ３が充電されツェナーダイオード
６で定まる電源までコンデンサ５が充電され、電源が立
上がる。1 to 6 are power supply circuits A, 7 to 14 are oscillation circuits B, 15 to 26 are detection circuits C, 27 to 30 are inversion circuits I, 32 are first semiconductor switches D, 33 are second semiconductor switches J, 34 corresponds to the battery E, 35 corresponds to the indicator light F, 36 corresponds to the indicator light G, and 37 corresponds to SW. The operation will be described below. First, when the switch 37 is closed and the indicator lights 35 and 36 are connected, the capacitors 3 are charged by the diodes 1 and 2 and the capacitor 3 and the battery 34 via the indicator lights 35 and 36, and the capacitor 5 is charged to the power supply determined by the Zener diode 6. And the power comes up.
スイッチ37が閉じた瞬間はコンデンサ12には電荷が蓄
積されていないので増幅器14の出力はL0電位となる。そ
してコンデンサ12と抵抗13で定まる時定数でコンデンサ
12に充電され、増幅器14のマイナス入力の電位が、抵抗
７と抵抗８、10で定まる電位（増幅器14のプラス入力）
より低くなると増幅器14の出力が反転してHi出力とな
る。するとコンデンサ12と抵抗13で定まる時定数でコン
デンサ12が放電され増幅器14のマイナス入力の電位が抵
抗７、9,10,ダイオード11と抵抗８で定まる電位（増幅
器14のプラス入力）より高くなると増幅器14の出力が反
転しL0出力となる。以上の作動を繰り返し発振回路Ｂが
作動する。そして、その発振波形を抵抗31を介し電界効
果トランジスタ（以下FET）32のゲートに入力し（増幅
器14の出力）FET32がオン・オフを繰り返し、指示灯36
が点滅する。At the moment when the switch 37 is closed, no charge is stored in the capacitor 12, so that the output of the amplifier 14 becomes the L0 potential. The capacitor has a time constant determined by the capacitor 12 and the resistor 13.
12 is charged, the potential of the minus input of the amplifier 14 is the potential determined by the resistor 7 and the resistors 8 and 10 (the plus input of the amplifier 14)
When the voltage becomes lower, the output of the amplifier 14 is inverted to a Hi output. Then, the capacitor 12 is discharged with the time constant determined by the capacitor 12 and the resistor 13, and the potential of the negative input of the amplifier 14 becomes higher than the potential determined by the resistors 7, 9, 10 and the diode 11 and the resistor 8 (the positive input of the amplifier 14). The output of 14 is inverted and becomes L0 output. The oscillation circuit B operates by repeating the above operation. The oscillating waveform is input to the gate of a field effect transistor (hereinafter, FET) 32 via a resistor 31 (the output of the amplifier 14), and the FET 32 repeatedly turns on and off.
Flashes.
また増幅器14の出力がL0の電位の時、抵抗27,28に電
流が流れトランジスタ29が導通しトランジスタ29のコレ
クタはHi電位となる。When the output of the amplifier 14 is at the potential L0, current flows through the resistors 27 and 28, and the transistor 29 is turned on, so that the collector of the transistor 29 becomes Hi potential.
すなわち増幅器14の出力が反転される。逆に増幅器14
の出力がHi電位の時トランジスタ29は不導通となり、ト
ランジスタ29のコレクタはL0電位となる。これが反転回
路Ｊの動作である。That is, the output of the amplifier 14 is inverted. Conversely, amplifier 14
Is high, the transistor 29 is turned off, and the collector of the transistor 29 is at the L0 potential. This is the operation of the inverting circuit J.
次に指示灯36の一灯36aが断線されるとFET32に流れる
負荷電流が約半分になりFET32で生ずる電圧降下も半分
になる。その電圧の変化をダイオード26及び抵抗23,24
を介して検出用増幅器20のマイナス入力に入力する。定
常時のFET32で生ずる電圧降下をE1とし、断線時にFET32
で生ずる電圧降下をE2とする。Next, when one light 36a of the indicator light 36 is disconnected, the load current flowing through the FET 32 is reduced by about half, and the voltage drop generated by the FET 32 is also reduced by half. The change in the voltage is applied to the diode 26 and the resistors 23 and 24.
Is input to the minus input of the detection amplifier 20 via. The voltage drop that occurs in FET32 during normal operation is E1.
Let E2 be the voltage drop caused by.
抵抗21,22で分割する電圧をE3としてその電圧E3が以
下になる条件になる様に設定する。Assuming that the voltage divided by the resistors 21 and 22 is E3, the voltage E3 is set so as to satisfy the following condition.
E1′＜E3＜E2′ ……（１） （E1′は電圧基準から見た定常時の検出電圧、E2′は異
常時の検出電圧） この設定によれば検出用増幅器20の出力が定常時Hi電
位、断線時L0とすることができる。したがって断線時は
増幅器20の出力はL0電圧であるからコンデンサ12、抵抗
15を介してトランジスタ18のベース電流が流れトランジ
スタ18が導通して前記発振回路内の時定数がコンデンサ
12と抵抗13及びダイオード16,抵抗17,15で定まる時定数
に変化し、つまり発振時定数が変化し、指示灯35,36の
点滅周期が変わり、１灯断線したことを警報する。E1 '<E3 <E2' (1) (E1 'is the detection voltage at the steady state viewed from the voltage reference, E2' is the detection voltage at the time of abnormality) According to this setting, the output of the detection amplifier 20 is in the steady state It can be set to Hi potential and L0 at disconnection. Therefore, when the wire is disconnected, the output of the amplifier 20 is the L0 voltage.
The base current of the transistor 18 flows through the transistor 15, the transistor 18 conducts, and the time constant in the oscillation circuit becomes a capacitor.
It changes to a time constant determined by 12, the resistor 13, the diode 16, and the resistors 17, 15, that is, the oscillation time constant changes, the blinking cycle of the indicator lamps 35, 36 changes, and an alarm is issued that one lamp is disconnected.
指示灯35の一灯が断線した時も同様でFET32の電圧降
下の変化をダイオード25及び抵抗23,24を介して検出用
増幅器20のマイナス入力に入力してやればよい。Similarly, when one of the indicator lamps 35 is disconnected, a change in the voltage drop of the FET 32 may be input to the minus input of the detection amplifier 20 via the diode 25 and the resistors 23 and 24.
（発明の効果） 本発明によれば長寿命で高信頼性で安価な指示装置を
供給でき産業上利用可能性大なるものである。(Effects of the Invention) According to the present invention, a long-life, highly reliable and inexpensive indicating device can be supplied, and industrial applicability is greatly increased.
【図面の簡単な説明】 第１図は本発明一実施例、第２図は本発明の更に具体的
な一実施例、第３図は従来の実施例である。図におい
て、Ａは電源回路、Ｂは発振回路、Ｃは検出回路、Ｄ、
Ｊ、32,33は半導体スイッチ、Ｅ、34はバッテリー、
Ｆ、Ｇ、35,36は指示灯、Ｉは反転回路、SW、37はスイ
ッチ、Ｒは検出抵抗、ａはリレーである。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, FIG. 2 shows a more specific embodiment of the present invention, and FIG. 3 shows a conventional embodiment. In the figure, A is a power supply circuit, B is an oscillation circuit, C is a detection circuit, and D,
J, 32, 33 are solid state switches, E, 34 are batteries,
F, G, 35 and 36 are indicator lights, I is an inverting circuit, SW and 37 are switches, R is a detection resistor, and a is a relay.
Claims (1)
１の半導体スイッチと他端子間に接続された第２の半導
体スイッチを有し、前記第１及び第２の半導体スイッチ
に電源を供給する電源回路と、コンデンサの充電及び放
電時定数を利用して前記第１の半導体スイッチにオン・
オフ信号を与える発振回路と、該発振回路のオン・オフ
信号を反転させ、前記第２の半導体スイッチにオン・オ
フ信号を与える反転回路と、前記第１及び第２の半導体
スイッチの定常時と断線時の電圧降下の差を利用して前
記時定数を変化せしめる検出回路を具備したことを特徴
とする電子式指示装置。A first semiconductor switch connected between one terminal of the three-terminal indicating device and a second semiconductor switch connected between the other terminals; and a power supply for the first and second semiconductor switches. And a power supply circuit for supplying power to the first semiconductor switch using a charge and discharge time constant of a capacitor.
An oscillating circuit for providing an off signal, an inverting circuit for inverting an on / off signal of the oscillating circuit, and applying an on / off signal to the second semiconductor switch, and a stationary state of the first and second semiconductor switches. An electronic pointing device, comprising: a detection circuit for changing the time constant by utilizing a difference in voltage drop at the time of disconnection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63320030A JP2966423B2 (en) | 1988-12-19 | 1988-12-19 | Electronic pointing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63320030A JP2966423B2 (en) | 1988-12-19 | 1988-12-19 | Electronic pointing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02164629A JPH02164629A (en) | 1990-06-25 |
| JP2966423B2 true JP2966423B2 (en) | 1999-10-25 |
Family
ID=18116965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63320030A Expired - Fee Related JP2966423B2 (en) | 1988-12-19 | 1988-12-19 | Electronic pointing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2966423B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0596990A (en) * | 1991-10-04 | 1993-04-20 | Shindengen Electric Mfg Co Ltd | Electronic direction indicating device |
| JP2785014B2 (en) * | 1991-11-19 | 1998-08-13 | 新電元工業株式会社 | Electronic turn signal |
| KR970069577A (en) * | 1996-04-18 | 1997-11-07 | 스즈키 다케토시 | Electronic Flasher |
| JPH09301068A (en) | 1996-05-13 | 1997-11-25 | Niles Parts Co Ltd | Electronic flasher device |
| JPH09301060A (en) | 1996-05-13 | 1997-11-25 | Niles Parts Co Ltd | Electronic flasher device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58104740U (en) * | 1982-01-12 | 1983-07-16 | 株式会社東海理化電機製作所 | flasher circuit |
| JPS592990U (en) * | 1982-06-29 | 1984-01-10 | 株式会社デンソー | Distributor cap with ignition cable |
| JPS59172036U (en) * | 1983-05-04 | 1984-11-17 | オムロン株式会社 | alternating interrupter |
| JPS63100343U (en) * | 1986-12-22 | 1988-06-29 | ||
| JP2611214B2 (en) * | 1987-03-23 | 1997-05-21 | 株式会社デンソー | Vehicle turn signal device |
-
1988
- 1988-12-19 JP JP63320030A patent/JP2966423B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02164629A (en) | 1990-06-25 |
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