JP2000306685A - Led lighting circuit - Google Patents

Led lighting circuit

Info

Publication number
JP2000306685A
JP2000306685A JP11737899A JP11737899A JP2000306685A JP 2000306685 A JP2000306685 A JP 2000306685A JP 11737899 A JP11737899 A JP 11737899A JP 11737899 A JP11737899 A JP 11737899A JP 2000306685 A JP2000306685 A JP 2000306685A
Authority
JP
Japan
Prior art keywords
led
resistor
voltage
diode
constant voltage
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
Application number
JP11737899A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Matsunaga
義之 松永
Original Assignee
Asahi National Lighting Co Ltd
朝日ナショナル照明株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi National Lighting Co Ltd, 朝日ナショナル照明株式会社 filed Critical Asahi National Lighting Co Ltd
Priority to JP11737899A priority Critical patent/JP2000306685A/en
Publication of JP2000306685A publication Critical patent/JP2000306685A/en
Application status is Pending legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

PROBLEM TO BE SOLVED: To reduce current through an LED(light emission diode) when an alternating current power supply is applied.
SOLUTION: In this LED lighting circuit, a plurality of light emission diodes LED 4, which are adequately interconnected in series responsive to purpose, are connected to an alternating-current power supply 1 through at least a capacitor 2 and a rectifying element 3. A resistor 5 is connected with an LED 4 in series, and a constant voltage diode 6 is connected to a series circuit of this resistor 5 and the LED 4 in parallel. During steady lighting time of the LED 4 the voltage across the series circuit of this resistor 5 and the LED 4 does not reach a break over voltage of the constant voltage diode 6, and during a rush current when applying the alternating-current power supply 1 the voltage across the series circuit of this resistor 5 and the LED 4 reaches the break over voltage of the constant voltage diode 6 and allow this constant voltage diode 6 to be turned on.
COPYRIGHT: (C)2000,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、LED(発光ダイオード)点灯回路に関する。 The present invention relates to relates to LED (light emitting diode) illumination circuit.

【0002】 [0002]

【従来の技術】交流電源に接続されるLED点灯回路の低コスト化を図るために、交流電源に少なくともコンデンサと整流素子を介してLEDを接続し、前記コンデンサの容量値を選定することによりLEDの定常点灯時の電流を所定電流に調整したLED点灯回路が想定される。 To reduce the cost of the Related Art LED lighting circuit connected to an AC power supply, and connect the LED through at least the capacitor and the rectifying device to an AC power supply, LED by selecting the capacitance value of the capacitor LED lighting circuit current at the time of steady lighting adjusted to a predetermined current is assumed.

【0003】 [0003]

【発明が解決しようとする課題】しかし、交流電源の投入時には前記コンデンサに過渡的に大きな充電電流が流れて突入電流が発生し、これがLEDの瞬間最大定格電流を超えてしまい、LEDが破壊するおそれを生じてしまうという解決すべき課題があることに着目されるべきである。 The object of the invention is to be Solved However, at the time of turn-on of the AC power supply is transiently in large charging current flows through the inrush current is generated in the capacitor, which may exceed the instantaneous maximum rated current of the LED, LED is destroyed possibility should be noted that there are problems to be solved that occurs a. 本発明はこのような解決すべき課題を鑑み、交流電源の投入時にLEDに流れる電流を低減することを目的とする。 The present invention has been made in view of the problems to be solved such, and an object thereof is to reduce the current flowing through the LED at the time of turn-on of the AC power supply.

【0004】 [0004]

【課題を解決するための手段】請求項に示した通りである。 Means for Solving the Problems] is as shown in claims.

【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さらに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 INVENTION Next is a description of embodiments of the present invention, it is an exemplary embodiment adopted in accordance with the present invention only, based on the present invention the specific matters that embodiment It must not be limited to interpret Te, the technical scope of the present invention further matter of the claims shall be determined based on the matter substantially equivalent and which matters.

【0006】図示の実施形態は、交流電源1に少なくともコンデンサ2と整流素子3を介して目的に応じて適宜複数直列としたLED4を接続するLED点灯回路であって、LED4に直列に抵抗5を接続するとともに、この抵抗5とLED4の直列回路に並列に定電圧ダイオード6を接続し、LED4の定常点灯時は前記抵抗5とL [0006] illustrated embodiment, an LED lighting circuit for connecting LED4 which was appropriately plurality series in accordance with the purpose through at least the capacitor 2 and the rectifying device 3 to the AC power supply 1, a resistor 5 in series with the LED4 as well as connections to connect the constant voltage diode 6 in parallel with the resistor 5 and LED4 series circuit, the steady lighting of LED4 is said resistor 5 L
ED4の直列回路の両端電圧は前記定電圧ダイオード6 Voltage across the series circuit of ED4 is the constant voltage diode 6
のブレークオーバー電圧(ツェナー電圧)に達しなく、 Not reach the breakover voltage of (Zener voltage),
交流電源1の投入による突入電流発生時には前記抵抗5 The resistance at the time of the inrush current generated by on of the AC power supply 1 5
とLED4の直列回路の両端電圧が前記定電圧ダイオード6のブレークオーバー電圧に達して、この定電圧ダイオード6をオン可能にしたLED点灯回路である。 When both ends voltage of the LED4 series circuit reaches the breakover voltage of the constant voltage diode 6, a LED lighting circuit of the constant voltage diode 6 allows on.

【0007】また、抵抗7は必要に応じてコンデンサ2 [0007] In addition, the resistor 7, if necessary capacitor 2
に直列接続され、LED4の定常点灯時の電流値を調整したり、突入電流値の緩和にも寄与している。 In series connected, and adjust the current value during steady lighting of LED 4, which also contributes to the relaxation of the inrush current. そして、 And,
スイッチ8の操作により交流電源1を本LED点灯回路に対して供給したり、遮断したりしている。 Operation and supplies the AC power source 1 relative to the LED lighting circuit by the switch 8, and or blocked. なお、スイッチ8はなくてもよいし、コンデンサ2と整流素子3と抵抗7の順序関係は図示の場合に限定されることはない。 The switch 8 may be omitted, the sequence relationship between the capacitor and resistor 2 and the rectifying device 3 7 is not limited to the illustrated case.

【0008】本実施形態によれば、LED4の定常点灯時における抵抗5とLED4の直列回路の両端電圧より高めのブレークオーバー電圧をもつ定電圧ダイオード6 According to the present embodiment, a constant voltage having a breakover voltage higher than the voltage across the resistor 5 and LED4 series circuit during steady-state lighting LED4 diode 6
が選定される。 There is selected. 従って、LED4の定常点灯時には定電圧ダイオード6はオフを維持し、無用な電力消費がない。 Therefore, the constant voltage diode 6 is kept off, there is no unnecessary power consumption during steady lighting of LED 4. 交流電源1の投入による突入電流発生時には抵抗5 Resistance at the time of the inrush current generated by the introduction of the AC power supply 1 5
にその突入電流が流れるため、抵抗5の両端電圧が上昇する。 Since the inrush current flows, the voltage across the resistor 5 increases. そうすると、抵抗5とLED4の直列回路の両端電圧も上昇して、これが定電圧ダイオード6のブレークオーバー電圧に達して、定電圧ダイオード6がオンになる。 Then, the voltage across the series circuit of a resistor 5 and LED4 be increased, which reaches the breakover voltage of the constant voltage diode 6, the Zener diode 6 is turned on. 従って、LED4に流れ込もうとした突入電流は定電圧ダイオード6にも流れるため、LED4に流れる電流をその瞬間最大定格電流を超えないようにでき、LE Accordingly, the inrush current was going flow into LED4 to flow in the constant voltage diode 6, can a current flowing to LED4 so as not to exceed the maximum instantaneous current rating, LE
D4が破壊するおそれを解消できる。 D4 can eliminate the risk of destruction.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施形態を示す回路図 Circuit diagram showing an embodiment of the present invention; FIG

【符号の説明】 DESCRIPTION OF SYMBOLS

1 交流電源 2 コンデンサ 3 整流素子 4 LED 5 抵抗 6 定電圧ダイオード 1 AC power supply 2 capacitor 3 rectifying device 4 LED 5 resistors 6 constant voltage diode

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 交流電源に少なくともコンデンサと整流素子を介してLEDを接続するLED点灯回路であって、LEDに直列に抵抗を接続するとともに、この抵抗とLEDの直列回路に並列に定電圧ダイオードを接続し、LEDの定常点灯時は前記抵抗とLEDの直列回路の両端電圧は前記定電圧ダイオードのブレークオーバー電圧に達しなく、交流電源の投入による突入電流発生時には前記抵抗とLEDの直列回路の両端電圧が前記定電圧ダイオードのブレークオーバー電圧に達して、この定電圧ダイオードをオン可能にしたLED点灯回路。 1. A LED lighting circuit for connecting the LED through at least the capacitor and the rectifying device to an AC power source, as well as a resistor in series with the LED, the voltage regulator diode in parallel with the series circuit of the resistor and LED connect, rated operation of the LED is the voltage across the series circuit of the resistor and the LED is not reached breakover voltage of the constant voltage diode, the inrush current occurs due to introduction of the AC power supply of the series circuit of the resistor and LED both ends voltage reaches the breakover voltage of the constant voltage diode, LED lighting circuit enables on the constant voltage diode.
JP11737899A 1999-04-26 1999-04-26 Led lighting circuit Pending JP2000306685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11737899A JP2000306685A (en) 1999-04-26 1999-04-26 Led lighting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11737899A JP2000306685A (en) 1999-04-26 1999-04-26 Led lighting circuit

Publications (1)

Publication Number Publication Date
JP2000306685A true JP2000306685A (en) 2000-11-02

Family

ID=14710177

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11737899A Pending JP2000306685A (en) 1999-04-26 1999-04-26 Led lighting circuit

Country Status (1)

Country Link
JP (1) JP2000306685A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004253364A (en) * 2003-01-27 2004-09-09 Matsushita Electric Ind Co Ltd Lighting system
WO2006004337A1 (en) * 2004-06-30 2006-01-12 Seoul Opto-Device Co., Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
WO2006082970A1 (en) * 2005-02-04 2006-08-10 Art Planning Service Co., Ltd. Alternating light emitting diode lighting unit for display device and display device using same
KR100675774B1 (en) 2004-08-31 2007-01-29 인더스트리얼 테크놀로지 리써치 인스티튜트 AC Light-Emitting Diode
JP2007059247A (en) * 2005-08-25 2007-03-08 Toshiba Lighting & Technology Corp Led lighting device
WO2007033526A1 (en) * 2005-09-23 2007-03-29 Qingbiao Wu Improved led string
KR101203139B1 (en) * 2010-01-06 2012-11-20 서울옵토디바이스주식회사 Luminous element having arrayed cells
KR101229835B1 (en) * 2012-03-08 2013-02-04 서울옵토디바이스주식회사 Luminous element having arrayed cells and Method for manufacturing the same and Luminous device using the same
WO2014046254A1 (en) * 2012-09-20 2014-03-27 本田 浩一 Lighting device provided with led elements
JP2014116620A (en) * 2004-06-30 2014-06-26 Seoul Viosys Co Ltd Light emitting diode
JP2014165014A (en) * 2013-02-25 2014-09-08 Panasonic Corp Lighting circuit and illumination light source
JP2015060786A (en) * 2013-09-20 2015-03-30 本田 浩一 Illumination device having led element

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004253364A (en) * 2003-01-27 2004-09-09 Matsushita Electric Ind Co Ltd Lighting system
US7964880B2 (en) 2004-06-30 2011-06-21 Seoul Opto Device Co., Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
WO2006004337A1 (en) * 2004-06-30 2006-01-12 Seoul Opto-Device Co., Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
JP2014116620A (en) * 2004-06-30 2014-06-26 Seoul Viosys Co Ltd Light emitting diode
US8492775B2 (en) 2004-06-30 2013-07-23 Seoul Opto Device Co. Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
US8198643B2 (en) 2004-06-30 2012-06-12 Seoul Opto Device Co., Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
US7804098B2 (en) 2004-06-30 2010-09-28 Seoul Opto Device Co., Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
US7871839B2 (en) 2004-06-30 2011-01-18 Seoul Opto Device Co., Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
US8168988B2 (en) 2004-06-30 2012-05-01 Seoul Opto Device Co., Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
KR100675774B1 (en) 2004-08-31 2007-01-29 인더스트리얼 테크놀로지 리써치 인스티튜트 AC Light-Emitting Diode
WO2006082970A1 (en) * 2005-02-04 2006-08-10 Art Planning Service Co., Ltd. Alternating light emitting diode lighting unit for display device and display device using same
JP4677859B2 (en) * 2005-08-25 2011-04-27 東芝ライテック株式会社 LED lighting device
JP2007059247A (en) * 2005-08-25 2007-03-08 Toshiba Lighting & Technology Corp Led lighting device
WO2007033526A1 (en) * 2005-09-23 2007-03-29 Qingbiao Wu Improved led string
KR101203139B1 (en) * 2010-01-06 2012-11-20 서울옵토디바이스주식회사 Luminous element having arrayed cells
KR101229835B1 (en) * 2012-03-08 2013-02-04 서울옵토디바이스주식회사 Luminous element having arrayed cells and Method for manufacturing the same and Luminous device using the same
WO2014046254A1 (en) * 2012-09-20 2014-03-27 本田 浩一 Lighting device provided with led elements
US20150264766A1 (en) * 2012-09-20 2015-09-17 Kouichi Honda Lighting Device Having LED Elements
US9271363B2 (en) 2012-09-20 2016-02-23 Hirokazu Honda Lighting device having LED elements
JP2014165014A (en) * 2013-02-25 2014-09-08 Panasonic Corp Lighting circuit and illumination light source
JP2015060786A (en) * 2013-09-20 2015-03-30 本田 浩一 Illumination device having led element

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