JPS63194500U - - Google Patents
Info
- Publication number
- JPS63194500U JPS63194500U JP8595387U JP8595387U JPS63194500U JP S63194500 U JPS63194500 U JP S63194500U JP 8595387 U JP8595387 U JP 8595387U JP 8595387 U JP8595387 U JP 8595387U JP S63194500 U JPS63194500 U JP S63194500U
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- oscillation
- transistor
- resistor
- base
- 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
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
第１図は本考案の１実施例の電気回路図、第２
図は第１図の正特性サーミスタの温度と抵抗値と
の関係を示す特性図、第３図は第１図の正特性サ
ーミスタの表面温度とこれの両端ピーク電圧との
関係を示す特性図である。
５……発振トランス、５ａ……１次巻線、５ｂ
……２次巻線、６，７……発振トランジスタ、８
……放電灯、１２……発振始動用抵抗、１４，１
５……整流素子、１６……コンデンサ、１７……
温度保護回路、１８……正特性サーミスタ、１９
，２０……分圧用抵抗、２２……抵抗、２３……
ベース電流制御用トランジスタ、２４……ツエナ
ダイオード、２５……バイアス抵抗。
Figure 1 is an electrical circuit diagram of one embodiment of the present invention, Figure 2 is an electrical circuit diagram of one embodiment of the present invention.
The figure is a characteristic diagram showing the relationship between temperature and resistance value of the positive temperature coefficient thermistor shown in Figure 1, and Figure 3 is a characteristic diagram showing the relationship between the surface temperature of the positive coefficient thermistor shown in Figure 1 and the peak voltage at both ends thereof. be. 5...Oscillation transformer, 5a...Primary winding, 5b
... Secondary winding, 6, 7 ... Oscillation transistor, 8
...Discharge lamp, 12...Resistance for starting oscillation, 14,1
5... Rectifying element, 16... Capacitor, 17...
Temperature protection circuit, 18...Positive characteristic thermistor, 19
, 20... Resistor for voltage division, 22... Resistor, 23...
Base current control transistor, 24...Zena diode, 25...bias resistor.
Claims (1)
する発振トランジスタとを有するインバータを備
え、このインバータを直流電力の供給により発振
駆動させてこれの高周波出力で放電灯を点灯する
装置において、前記インバータによる高周波回路
部または直流電力供給源の低周波回路部からの整
流素子、コンデンサおよび温度保護回路を介して
発振トランジスタにベース電流を供給するベース
電流供給回路を備え、この温度保護回路を、一端
が前記インバータの正極に接続され他端が前記発
振トランジスタのベースに接続された発振始動用
抵抗の他端と前記コンデンサとの間に、正の温度
−抵抗特性を有する正特性サーミスタと複数個の
分圧用抵抗の直列回路とを並列接続し、前記発振
始動用抵抗とサーミスタとの接続点と前記インバ
ータの負極との間に、抵抗およびベース電流制御
用トランジスタを直列接続し、このトランジスタ
のベースと前記分圧用抵抗の分圧接続点との間に
ツエナダイオードを接続し、このツエナダイオー
ドとベースとの接続点とインバータの負極との間
にバイアス抵抗を接続して構成したことを特徴と
する放電灯の点灯装置。 In a device that includes an inverter having an oscillation transformer and an oscillation transistor that switches the primary winding of the inverter, the inverter is driven to oscillate by supplying DC power to light a discharge lamp with its high-frequency output. A base current supply circuit that supplies base current to the oscillation transistor from the circuit section or the low frequency circuit section of the DC power supply source through the rectifier, the capacitor, and the temperature protection circuit is provided, and one end of the temperature protection circuit is connected to the inverter. A positive temperature characteristic thermistor having a positive temperature-resistance characteristic and a plurality of voltage dividing resistors are connected between the other end of the oscillation starting resistor, which is connected to the positive terminal of the oscillation transistor and the other end is connected to the base of the oscillation transistor, and the capacitor. A resistor and a base current control transistor are connected in series between the connection point between the oscillation starting resistor and the thermistor and the negative electrode of the inverter, and the base of this transistor and the voltage dividing circuit are connected in parallel. Lighting of a discharge lamp characterized in that a Zener diode is connected between a voltage dividing connection point of a resistor, and a bias resistor is connected between a connection point between the Zener diode and a base and a negative electrode of an inverter. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8595387U JPS63194500U (en) | 1987-06-02 | 1987-06-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8595387U JPS63194500U (en) | 1987-06-02 | 1987-06-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63194500U true JPS63194500U (en) | 1988-12-14 |
Family
ID=30941823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8595387U Pending JPS63194500U (en) | 1987-06-02 | 1987-06-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63194500U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60100A (en) * | 1983-06-15 | 1985-01-05 | 株式会社共進電機製作所 | Firing device of discharge lamp |
| JPS61153996A (en) * | 1984-12-26 | 1986-07-12 | 株式会社 ソフア−ド | Improvement for brightness of neon sign using high frequency power source |
| JPS6251195A (en) * | 1986-07-26 | 1987-03-05 | 東芝ライテック株式会社 | Discharge lamp lighting apparatus |
-
1987
- 1987-06-02 JP JP8595387U patent/JPS63194500U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60100A (en) * | 1983-06-15 | 1985-01-05 | 株式会社共進電機製作所 | Firing device of discharge lamp |
| JPS61153996A (en) * | 1984-12-26 | 1986-07-12 | 株式会社 ソフア−ド | Improvement for brightness of neon sign using high frequency power source |
| JPS6251195A (en) * | 1986-07-26 | 1987-03-05 | 東芝ライテック株式会社 | Discharge lamp lighting apparatus |
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