JPS63171999U - - Google Patents
Info
- Publication number
- JPS63171999U JPS63171999U JP6484787U JP6484787U JPS63171999U JP S63171999 U JPS63171999 U JP S63171999U JP 6484787 U JP6484787 U JP 6484787U JP 6484787 U JP6484787 U JP 6484787U JP S63171999 U JPS63171999 U JP S63171999U
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- discharge lamp
- lighting
- oscillation frequency
- circuit
- 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
- 230000010355 oscillation Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
図は本考案の放電灯の点灯装置の一実施例の電
気回路図である。
７……発振回路、８……出力トランス、９……
スイツチング素子、１０……限流素子、１１，１
２，１３，１５……発振周波数決定用素子、１８
……点灯始動回路、１９……点灯始動検出用素子
。
The figure is an electrical circuit diagram of an embodiment of the discharge lamp lighting device of the present invention. 7...Oscillation circuit, 8...Output transformer, 9...
Switching element, 10... Current limiting element, 11, 1
2, 13, 15...Oscillation frequency determining element, 18
...Lighting start circuit, 19...Lighting start detection element.
Claims (1)
るスイツチング素子と、このスイツチング素子に
より直流電力が断続的に供給される出力トランス
と、この出力トランスおよびこれの負荷となる放
電灯の間に接続された限流素子と、放電灯の点灯
始動回路に流れる予熱電流の有無の検出により前
記発振回路の発振周波数決定用素子を切換えて発
振周波数を可変する点灯始動検出素子とを備え、
前記発振周波数決定用素子としての複数個の抵抗
を、前記発振回路の発振出力による前記スイツチ
ング素子のオフ期間がオン期間に対し長くなるよ
う互いに異なる抵抗値に定めるとともに、この各
抵抗を、前記点灯始動検出用素子によつて放電灯
の点灯前における前記限流素子のインピーダンス
が点灯後に対し小さくなるような発振周波数に設
定すべく切換える構成としたことを特徴とする放
電灯の点灯装置。 A switching element that is controlled on and off by the oscillation output of an oscillator circuit, an output transformer to which DC power is intermittently supplied by this switching element, and a discharge lamp that is a load of this output transformer and this are connected. comprising a current limiting element and a lighting start detection element that changes the oscillation frequency by switching an oscillation frequency determining element of the oscillation circuit by detecting the presence or absence of a preheating current flowing in a lighting start circuit of the discharge lamp;
The plurality of resistors serving as the oscillation frequency determining elements are set to different resistance values so that the off period of the switching element due to the oscillation output of the oscillation circuit is longer than the on period, and each of the resistors is 1. A lighting device for a discharge lamp, characterized in that a starting detection element switches to set an oscillation frequency such that the impedance of the current-limiting element before lighting the discharge lamp is smaller than after lighting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6484787U JPS63171999U (en) | 1987-04-27 | 1987-04-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6484787U JPS63171999U (en) | 1987-04-27 | 1987-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63171999U true JPS63171999U (en) | 1988-11-09 |
Family
ID=30901380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6484787U Pending JPS63171999U (en) | 1987-04-27 | 1987-04-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63171999U (en) |
-
1987
- 1987-04-27 JP JP6484787U patent/JPS63171999U/ja active Pending
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