JPH10270186A - Discharge lamp lighting device - Google Patents
Discharge lamp lighting deviceInfo
- Publication number
- JPH10270186A JPH10270186A JP8768297A JP8768297A JPH10270186A JP H10270186 A JPH10270186 A JP H10270186A JP 8768297 A JP8768297 A JP 8768297A JP 8768297 A JP8768297 A JP 8768297A JP H10270186 A JPH10270186 A JP H10270186A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- microcomputer
- inverter
- ground
- switch
- 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.)
- Pending
Links
- 230000015556 catabolic process Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、制御用のマイコン
を備えた放電灯点灯装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device having a control microcomputer.
【０００２】[0002]
【従来の技術】交流電源の整流部の出力をインバータを
介して放電灯に供給するとともに、インバータを制御す
るマイコンとマイコンに指示信号を与えるスイッチとを
備えた放電灯点灯装置が知られている。2. Description of the Related Art A discharge lamp lighting device is known which supplies an output of a rectifier of an AC power supply to a discharge lamp via an inverter, and includes a microcomputer for controlling the inverter and a switch for giving an instruction signal to the microcomputer. .
【０００３】[0003]
【発明が解決しようとする課題】しかし、静電気を帯び
た手でスイッチに触れた場合にマイコンが破壊すること
があり、その原因の究明が急がれていた。本発明はこの
ような解決すべき課題を鑑み、制御用のマイコンを備え
た放電灯点灯装置においてマイコンの破壊を防止するこ
とを目的とする。However, when the switch is touched with a hand charged with static electricity, the microcomputer may be destroyed, and the cause has been urgently sought. SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems, and has as its object to prevent a microcomputer from being destroyed in a discharge lamp lighting device including a control microcomputer.
【０００４】[0004]
【課題を解決するための手段】本発明を要約すると、交
流電源の整流部の出力をインバータを介して放電灯に供
給するとともに、インバータを制御するマイコンとマイ
コンに指示信号を与えるスイッチとを備え、スイッチの
アース端子を、整流部の出力とインバータと放電灯のグ
ラウンド側を結ぶパワーグラウンドに接続した放電灯点
灯装置である。SUMMARY OF THE INVENTION In summary, the present invention comprises a microcomputer for controlling an inverter and a switch for supplying an instruction signal to the microcomputer, while supplying an output of a rectifier of an AC power supply to a discharge lamp via an inverter. A discharge lamp lighting device in which the ground terminal of the switch is connected to a power ground connecting the output of the rectifier and the inverter to the ground side of the discharge lamp.
【０００５】[0005]
【発明の実施の形態】次に、本発明の実施形態を説明す
るが、それはあくまで本発明に基づいて採択された例示
的な実施形態であり、本発明をその実施形態のみに特有
な事項に基づいて限定解釈してはならず、本発明の技術
的範囲は、請求項に示した事項あるいはその事項と実質
的に等価である事項に基づいて定めなければならない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described. However, these are merely exemplary embodiments adopted based on the present invention, and the present invention is limited to matters unique to only the embodiments. The technical scope of the present invention must be determined based on the matters stated in the claims or matters that are substantially equivalent thereto.
【０００６】図示の実施形態は、交流電源１の整流部２
の出力をインバータ３を介して放電灯４に供給するとと
もに、インバータ３を制御するマイコン５とマイコン５
に指示信号を与えるスイッチ６とを備え、スイッチ６の
アース端子７を、整流部２の出力とインバータ３と放電
灯４のグラウンド側を結ぶパワーグラウンド８に接続し
た放電灯点灯装置である。アース端子７は通常、スイッ
チ６の外殻に接続されている。In the illustrated embodiment, a rectifier 2 of an AC power supply 1 is shown.
Is supplied to the discharge lamp 4 through the inverter 3 and the microcomputer 5 and the microcomputer 5 that control the inverter 3.
And a switch 6 for giving an instruction signal to the discharge lamp lighting device, wherein a ground terminal 7 of the switch 6 is connected to a power ground 8 connecting the output of the rectifier 2 and the inverter 3 to the ground side of the discharge lamp 4. The ground terminal 7 is usually connected to the outer shell of the switch 6.
【０００７】さらに述べると、整流部２は整流器９と平
滑コンデンサ１０を備える。チョッパを必要とする場合
は整流器９と平滑コンデンサ１０の間に介在される。整
流部２とはそのようなチョッパがある場合も含む用語で
ある。マイコン５の電源となる制御電源１１は整流部２
の出力を低電圧化したものである。なお、制御電源１１
は交流電源１から独立の整流部を介して得てもよい。そ
して、制御電源１１とマイコン５とスイッチ６のグラウ
ンド側は制御グラウンド１２に接続され、制御グラウン
ド１２は整流部２の出力のパワーグラウンド８側、すな
わち、平滑コンデンサ１０のパワーグラウンド８側に接
続されている。More specifically, the rectifying unit 2 includes a rectifier 9 and a smoothing capacitor 10. If a chopper is required, it is interposed between the rectifier 9 and the smoothing capacitor 10. The rectifying unit 2 is a term including the case where such a chopper is present. A control power supply 11 serving as a power supply for the microcomputer 5 is provided with a rectifier 2
Is a low-voltage output. The control power supply 11
May be obtained from the AC power supply 1 via an independent rectifier. The ground sides of the control power supply 11, the microcomputer 5, and the switch 6 are connected to the control ground 12, and the control ground 12 is connected to the power ground 8 side of the output of the rectifying unit 2, that is, to the power ground 8 side of the smoothing capacitor 10. ing.
【０００８】本実施形態によれば、静電気を帯びた手で
スイッチ６に触れた場合でもそのアース端子７を介して
パワーグラウンド８側に放電され、マイコン５の破壊を
的確に防止することができる。According to the present embodiment, even when the switch 6 is touched with a static-charged hand, the switch 6 is discharged to the power ground 8 via the ground terminal 7 and the microcomputer 5 can be properly prevented from being destroyed. .
【図１】回路ブロック図FIG. 1 is a circuit block diagram.
１ 交流電源 ２ 整流部 ３ インバータ ４ 放電灯 ５ マイコン ６ スイッチ ７ アース端子 ８ パワーグラウンド 1 AC power supply 2 Rectifier 3 Inverter 4 Discharge lamp 5 Microcomputer 6 Switch 7 Ground terminal 8 Power ground
Claims (2)
介して放電灯に供給するとともに、インバータを制御す
るマイコンとマイコンに指示信号を与えるスイッチとを
備え、スイッチのアース端子を、整流部の出力とインバ
ータと放電灯のグラウンド側を結ぶパワーグラウンドに
接続した放電灯点灯装置。An output of a rectifier of an AC power supply is supplied to a discharge lamp through an inverter, and a microcomputer for controlling the inverter and a switch for giving an instruction signal to the microcomputer are provided. Discharge lamp lighting device connected to the output, power ground that connects the inverter and the ground side of the discharge lamp.
のグラウンド側は制御グラウンドに接続され、制御グラ
ウンドは整流部の出力のパワーグラウンド側に接続され
た放電灯点灯装置。2. The discharge lamp lighting device according to claim 1, wherein ground sides of the microcomputer and the switch are connected to a control ground, and the control ground is connected to a power ground side of an output of the rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8768297A JPH10270186A (en) | 1997-03-21 | 1997-03-21 | Discharge lamp lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8768297A JPH10270186A (en) | 1997-03-21 | 1997-03-21 | Discharge lamp lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10270186A true JPH10270186A (en) | 1998-10-09 |
Family
ID=13921712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8768297A Pending JPH10270186A (en) | 1997-03-21 | 1997-03-21 | Discharge lamp lighting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10270186A (en) |
-
1997
- 1997-03-21 JP JP8768297A patent/JPH10270186A/en active Pending
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