JP2012028184A5

JP2012028184A5 -

Info

Publication number: JP2012028184A5
Application number: JP2010166024A
Authority: JP
Filing date: 2010-07-23
Publication date: 2013-10-24
Anticipated expiration: 2030-07-23

Description

この発明に係るＬＥＤ点灯装置は、直列に接続した複数のＬＥＤで構成されたＬＥＤ光源を備え、ＬＥＤ光源の複数のＬＥＤのうち、点灯不要なＬＥＤの端子間を短絡して消灯し、残りのＬＥＤを点灯することによって、任意の発光を行う灯具のＬＥＤを点灯するＬＥＤ点灯装置において、電源を受けてＬＥＤ点灯用の所定の電力をＬＥＤ光源へ供給する電源部と、ＬＥＤの端子間を短絡及び開放するスイッチング素子と、電源部による電力供給動作及びスイッチング素子によるＬＥＤの端子間を短絡及び開放する動作を制御する制御部とを備え、スイッチング素子によるＬＥＤの端子間の開放から短絡へ切り換える動作及び短絡から開放へ切り換える動作を、電源部による出力電力の応答動作より緩慢にし、制御部は、一部のＬＥＤの端子間を短絡するスイッチング素子を開放した場合に、当該ＬＥＤに通電される電流が途絶えると、当該ＬＥＤ及び当該ＬＥＤに接続した配線の一部を含む端子間をスイッチング素子によって再び短絡するものである。 The LED lighting device according to the present invention includes an LED light source composed of a plurality of LEDs connected in series, and among the plurality of LEDs of the LED light source, the terminals of the LEDs that do not need to be lighted are short-circuited and turned off, In an LED lighting device that lights an LED of a lamp that emits light arbitrarily by turning on the LED, a short circuit is established between the power supply unit that receives power and supplies a predetermined power for LED lighting to the LED light source and the LED terminal. A switching element to be opened and a control unit for controlling a power supply operation by the power supply unit and an operation for short-circuiting and opening the terminals of the LED by the switching element, and an operation for switching from opening to short-circuiting of the LEDs by the switching element and the operation of switching from the short circuit to open, and slowly than the response behavior of the output power by the power supply unit, control unit, a part of the LED terminal When opening the switching element for short-circuiting, the current conducted to the LED is interrupted, in which short-circuited again by the switching device between terminals including a part of the wiring connected to the LED and the LED.

Claims

直列に接続した複数のＬＥＤを光源として、当該光源の一部のＬＥＤの端子間を短絡して消灯することによって任意の発光を行う灯具に備えたＬＥＤを点灯するＬＥＤ点灯装置において、
電源を受けてＬＥＤ点灯用の所定の電力を前記ＬＥＤへ供給する電源部と、
前記ＬＥＤの端子間を短絡及び開放するスイッチング素子と、
前記電源部による電力供給動作及び前記スイッチング素子による前記ＬＥＤの端子間を短絡及び開放する動作を制御する制御部とを備え、
前記スイッチング素子による前記ＬＥＤの端子間の開放から短絡へ切り換える動作及び短絡から開放へ切り換える動作を、前記電源部による出力電力の応答動作より緩慢にし、
前記制御部は、一部の前記ＬＥＤの端子間を短絡する前記スイッチング素子を開放した場合に、該ＬＥＤに通電される電流が途絶えると、該ＬＥＤ及び該ＬＥＤに接続した配線の一部を含む端子間を前記スイッチング素子によって再び短絡する
ことを特徴とするＬＥＤ点灯装置。 In a LED lighting device that lights a plurality of LEDs connected in series as a light source, the LED provided in a lamp that emits light arbitrarily by short-circuiting between the terminals of some of the LEDs of the light source,
A power supply unit that receives power and supplies predetermined power for LED lighting to the LED;
A switching element for short-circuiting and opening the terminals of the LED ;
A power supply operation by the power supply unit and a control unit that controls an operation of short-circuiting and opening the terminals of the LED by the switching element ,
The operation of switching from open to short circuit between the terminals of the LED by the switching element and the operation of switching from short circuit to open are made slower than the response operation of the output power by the power supply unit ,
The control unit includes the LED and a part of the wiring connected to the LED when the current supplied to the LED stops when the switching element that short-circuits between the terminals of some of the LEDs is opened. The LED lighting device , wherein the terminals are again short-circuited by the switching element .

前記スイッチング素子を動作させる信号に遅延を与える遅延回路を備えたことを特徴とする請求項１記載のＬＥＤ点灯装置。 The LED lighting device according to claim 1, further comprising a delay circuit that delays a signal for operating the switching element.

前記制御部は、前記ＬＥＤ及びその配線に断線故障が生じ当断線故障部分をスイッチング素子によって短絡する場合に、先ず、前記電源部による電力供給を停止してから、前記スイッチング素子によって当該ＬＥＤの端子間を短絡した後に、前記電源部を動作して前記ＬＥＤに電力供給を行うことを特徴とする請求項１記載のＬＥＤ点灯装置。 When the disconnection failure occurs in the LED and its wiring and the disconnection failure part is short-circuited by the switching element, the control unit first stops the power supply by the power supply unit and then the terminal of the LED by the switching element. while after short-circuited, and operates the power supply unit LED lighting device according to claim 1, characterized in that the power supply to the LED.

前記制御部は、前記スイッチング素子によるＬＥＤの端子間の開放から短絡に切り換える動作の前に、前記ＬＥＤへの出力電流を一時的に小さくするように制御し、前記スイッチング素子によるＬＥＤの端子間の短絡から開放に切り換える動作の前に、前記ＬＥＤへの出力電流を一時的に大きくするように制御することを特徴とする請求項１記載のＬＥＤ点灯装置。 The controller controls the output current to the LED to be temporarily reduced before the operation to switch from open to short circuit between the LED terminals by the switching element, and between the LED terminals by the switching element. 2. The LED lighting device according to claim 1, wherein the LED lighting device is controlled to temporarily increase an output current to the LED before an operation of switching from a short circuit to an open circuit. 3.

前記電源部をＬＥＤ点灯用の電圧としてマイナス電圧を前記ＬＥＤへ供給する構成とし、前記スイッチング素子をマイナス電位側に配置し、前記制御部のプラス電位からマイナス電位の前記スイッチング素子を動作するレベルシフト回路とを備えたことを特徴とする請求項１記載のＬＥＤ点灯装置。 Level the power supply unit to the negative voltage and configured to supply to the LED as a voltage for the LED light up, placing the switching element to the negative potential side, to operate the switching elements of the negative potential from the positive potential before Symbol controller The LED lighting device according to claim 1, further comprising a shift circuit.

前記電源部をＬＥＤ点灯用の電圧としてプラス電圧を前記ＬＥＤへ供給する構成とし、前記スイッチング素子をプラス電位側に配置し、前記スイッチング素子を動作するブートストラップ回路とを備えたことを特徴とする請求項１記載のＬＥＤ点灯装置。 And characterized in that the power supply unit a positive voltage and configured to supply to the LED as a voltage for the LED lighting, placing the switching element to the positive potential side, and a bootstrap circuit that operates the front Stories switching element The LED lighting device according to claim 1.

前記制御部は、前記電源部を制御して、前記ＬＥＤに櫛歯状の断続電流を供給することによって、前記ＬＥＤを減光点灯することを特徴とする請求項１記載のＬＥＤ点灯装置。 Before SL control unit controls the power supply unit, by supplying the interdigital intermittent current to the LED, LED lighting device according to claim 1, characterized in that dimming the LED.

前記ＬＥＤに供給する櫛歯状の断続電流は、前記電源部の動作と停止を繰り返すことにより生成することを特徴とする請求項７記載のＬＥＤ点灯装置。 The LED lighting device according to claim 7 , wherein the comb-like intermittent current supplied to the LED is generated by repeatedly operating and stopping the power supply unit.

前記制御部は、前記ＬＥＤに出力する出力電圧をフィードバックして所定の電圧を出力する機能を備え、前記ＬＥＤに供給する櫛歯状の断続電流を生成するときに、電流が断続する中の前記ＬＥＤを点灯するタイミングにおいては、前記スイッチング素子によって点灯しないＬＥＤの端子間を短絡して、所定の電流を出力し、前記ＬＥＤを消灯するタイミングにおいては、前記スイッチング素子を開放して、前記直列に接続した全てのＬＥＤの順方向電圧の合計電圧より低く、前記点灯するＬＥＤの順方向電圧の合計電圧より高い電圧を出力することを特徴とする請求項７記載のＬＥＤ点灯装置。 The control unit has a function of outputting a predetermined voltage by feeding back an output voltage output to the LED, and when generating a comb-like intermittent current to be supplied to the LED, the current is intermittent At the timing of turning on the LED, the terminals of the LEDs not lit by the switching element are short-circuited to output a predetermined current, and at the timing of turning off the LED, the switching element is opened and the series 8. The LED lighting device according to claim 7 , wherein the LED lighting device outputs a voltage lower than a total forward voltage of all connected LEDs and higher than a total forward voltage of the LEDs to be lit.

前記ＬＥＤを光源とした灯具は、走行灯用のＬＥＤとすれ違い灯用のＬＥＤを直列に接続したヘッドランプであることを特徴とする請求項１記載のＬＥＤ点灯装置。 The LED lighting device according to claim 1, wherein the lamp using the LED as a light source is a headlamp in which an LED for a traveling lamp and an LED for a passing lamp are connected in series.