JPH0242396U - - Google Patents
Info
- Publication number
- JPH0242396U JPH0242396U JP12103888U JP12103888U JPH0242396U JP H0242396 U JPH0242396 U JP H0242396U JP 12103888 U JP12103888 U JP 12103888U JP 12103888 U JP12103888 U JP 12103888U JP H0242396 U JPH0242396 U JP H0242396U
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- filament
- inverter
- high frequency
- lighting device
- 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
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
同上の動作説明図、第３図は共振コンデンサを別
個に備える場合の回路図、第４図は従来例の回路
図、第５図は同上の動作説明図、第６図は第４図
回路の具体回路図である。
１は整流平滑回路、２はインバータ、３は発振
制御回路、５は検出回路、ＤＬは放電灯、ｆ１，
ｆ２はフイラメント、Ｃ１，Ｃ４はコンデンサ、
Ｒ１，Ｒ２は抵抗である。
Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of the same operation as above, Fig. 3 is a circuit diagram when a resonant capacitor is provided separately, Fig. 4 is a circuit diagram of a conventional example, and Fig. 4 is a circuit diagram of a conventional example. FIG. 5 is an explanatory diagram of the same operation as above, and FIG. 6 is a specific circuit diagram of the circuit of FIG. 4. 1 is a rectifying and smoothing circuit, 2 is an inverter, 3 is an oscillation control circuit, 5 is a detection circuit, DL is a discharge lamp, f 1 ,
f 2 is a filament, C 1 and C 4 are capacitors,
R 1 and R 2 are resistances.
Claims (1)
ータで高周波電圧に変換して放電灯に印加し、放
電灯を高周波点灯する放電灯点灯装置において、
放電灯のフイラメントの非電源側に接続された予
熱用のコンデンサに流れる電流と同位相且つ同波
形の電流が流れるコンデンサと抵抗とで構成され
た電流検出部を放電灯のフイラメントの電源側に
備え、この電流検出部の出力から放電灯の寿命末
期を検出し、インバータの発振制御を行う制御手
段を備えて成ることを特徴とする放電灯点灯装置
。 In a discharge lamp lighting device that converts a DC voltage obtained by rectifying and smoothing an AC power source into a high frequency voltage using an inverter and applies it to a discharge lamp to light the discharge lamp at high frequency,
A current detection unit is provided on the power supply side of the filament of the discharge lamp, which is composed of a capacitor and a resistor through which a current flows in the same phase and waveform as the current flowing in the preheating capacitor connected to the non-power supply side of the filament of the discharge lamp. A discharge lamp lighting device comprising: a control means for detecting the end of the life of the discharge lamp from the output of the current detection section and controlling oscillation of the inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12103888U JPH0242396U (en) | 1988-09-14 | 1988-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12103888U JPH0242396U (en) | 1988-09-14 | 1988-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0242396U true JPH0242396U (en) | 1990-03-23 |
Family
ID=31367688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12103888U Pending JPH0242396U (en) | 1988-09-14 | 1988-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0242396U (en) |
-
1988
- 1988-09-14 JP JP12103888U patent/JPH0242396U/ja active Pending
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