JP2018092721A - Light-emitting diode drive device, and lighting apparatus and fishing light using the same - Google Patents

Light-emitting diode drive device, and lighting apparatus and fishing light using the same Download PDF

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JP2018092721A
JP2018092721A JP2016232883A JP2016232883A JP2018092721A JP 2018092721 A JP2018092721 A JP 2018092721A JP 2016232883 A JP2016232883 A JP 2016232883A JP 2016232883 A JP2016232883 A JP 2016232883A JP 2018092721 A JP2018092721 A JP 2018092721A
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led unit
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energization control
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JP6848396B2 (en
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照雄 渡▲辺▼
Teruo Watanabe
照雄 渡▲辺▼
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Nichia Chemical Industries Ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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Abstract

PROBLEM TO BE SOLVED: To suppress flickers of a light-emitting diode drive device lightened by an AC power supply.MEANS FOR SOLVING THE PROBLEM: A light-emitting diode drive device comprises: a second half-wave rectification circuit 52 connected with a common AC power supply, and that performs half-wave rectification of an AC voltage of the AC power supply at a different timing from a first half-wave rectification circuit 51 to obtain a second rectification voltage; a sixth energization controller 26 connected in parallel to a first LED part 11 and in series to a second LED part 12 when seen from the second LED part 12, and configured to control an energization amount to the second LED part 12 in a state applied with the second rectification voltage; a fifth energization controller 25 series-connected between an output side of the second half-wave rectification circuit 52 and the first LED part 11, and configured to control an energization amount to the first LED part 11 and the second LED part 12 in a state applied with the second rectification voltage; and a second current controller 32 configured to control the fifth energization controller 25 and the sixth energization controller 26 on the basis of a current value flowing in the second LED part 12 in a state applied with the second rectification voltage.SELECTED DRAWING: Figure 1

Description

本発明は、発光ダイオード駆動装置及びこれを用いた照明、漁灯に関する。   The present invention relates to a light emitting diode driving device, and an illumination and fishing light using the same.

近年、照明用の光源として、白熱電球や蛍光灯に比べ低消費電力で駆動可能な発光ダイオード（以下「ＬＥＤ」ともいう。）が注目されている。ＬＥＤは小型で耐衝撃性にも強く、寿命が長いといった利点がある。   In recent years, light-emitting diodes (hereinafter also referred to as “LEDs”) that can be driven with lower power consumption than incandescent bulbs and fluorescent lamps have attracted attention as light sources for illumination. LEDs have the advantage of being small, strong in impact resistance, and having a long life.

このような照明機器用の電源としては、商用電源等の交流電源を用いることが望まれる。一方、ＬＥＤは直流駆動素子であり、順方向の電流でのみ発光する。   As such a power source for lighting equipment, it is desirable to use an AC power source such as a commercial power source. On the other hand, the LED is a DC drive element and emits light only with a forward current.

この相反する条件に応えるため、交流電源を用いたＬＥＤの駆動回路が、種々提案されている。例えば、変化する電圧値に応じてＶｆの合計値を変化させるようにＬＥＤを切り替える方法が提案されている（特許文献１）。この方法では、図１０の回路図に示すように、多段に直列接続されたＬＥＤをブロック１６１、１６２、１６３、１６４、１６５、１６６に分け、整流波形の入力電圧の電圧値に応じてＬＥＤブロック１６１〜１６６の接続を、マイクロコンピュータで構成されたスイッチ制御部１６７で切り替えることで、段階的にＶｆの合計値を変化させる。この結果、図１１のタイミングチャートに示す電圧波形のように、整流波形に対して複数の方形波でＬＥＤを点灯できるため、単一の方形波のみでのＯＮデューティに比べ、ＬＥＤの利用効率を改善できる。   In order to meet these conflicting conditions, various LED drive circuits using an AC power supply have been proposed. For example, a method of switching LEDs so as to change the total value of Vf according to a changing voltage value has been proposed (Patent Document 1). In this method, as shown in the circuit diagram of FIG. 10, the LEDs connected in series in multiple stages are divided into blocks 161, 162, 163, 164, 165, and 166, and the LED block according to the voltage value of the input voltage of the rectified waveform. The total value of Vf is changed stepwise by switching the connection of 161 to 166 with a switch control unit 167 constituted by a microcomputer. As a result, since the LED can be lit with a plurality of square waves with respect to the rectified waveform as in the voltage waveform shown in the timing chart of FIG. 11, the LED utilization efficiency is improved compared to the ON duty with only a single square wave. Can improve.

しかしながら、このＬＥＤ駆動回路では、ダイオードブリッジ回路で交流波形を全波整流しているため、電圧の波高値が周期的に変化する結果、多段で構成された各ＬＥＤの点灯期間が異なる。この結果、一部のＬＥＤの点灯期間が長く、他のＬＥＤの点灯期間が短くなる結果、発光むらが生じるという問題があった。具体的には図１１に示すように、第１のＬＥＤの点灯期間が最も長い一方、第６のＬＥＤの点灯期間は最も短くなり、第１のＬＥＤに対して稼働率が約１０％となる。このようにＬＥＤ毎に点灯時間にむらが生じる結果、例えばＬＥＤが比較的大きい面積に配置され、均一な照射照度を求められる用途、例えばバックライト照明、看板照明などには不適であった。   However, in this LED drive circuit, since the AC waveform is full-wave rectified by the diode bridge circuit, the peak value of the voltage changes periodically, and as a result, the lighting periods of the LEDs configured in multiple stages are different. As a result, the lighting period of some LEDs is long and the lighting periods of other LEDs are shortened, resulting in a problem of uneven light emission. Specifically, as shown in FIG. 11, while the lighting period of the first LED is the longest, the lighting period of the sixth LED is the shortest, and the operating rate is about 10% with respect to the first LED. . Thus, as a result of unevenness in lighting time for each LED, for example, the LED is disposed in a relatively large area, and is not suitable for applications requiring uniform illumination illuminance, such as backlight illumination and signboard illumination.

一方特許文献２には、図１２に示すように、発光ブロック１７１、１７２、１７３、１７４に流れる電流をバイパスさせるスイッチが、直列に配列されたスイッチＳＢ＿１〜ＳＢ＿３を含むスイッチブロックＳＢと並列に配列されたスイッチＳＡ＿１〜ＳＡ＿３を含むスイッチブロックＳＡを含む交流駆動ＬＥＤ照明装置が開示される。この交流駆動ＬＥＤ照明装置では、（１）奇数番目の整流サイクルでは、低い番号の発光ブロックから（すなわち、図面を基準として左側の発光ブロック１７１から）優先して点灯される継続点灯法を実施する。これのために直列配列されたスイッチブロックＳＢは全部遮断し、並列配列されたスイッチブロックＳＡを使用して点灯を実施する。（２）偶数番目の整流サイクルでは、高い番号の発光ブロックから（すなわち、図面を基準として右側の発光ブロック１７４から）優先して点灯される継続点灯法を実施する。これのために並列配列されたスイッチブロックＳＡは全部遮断し、直列配置されたスイッチブロックＳＢを使用して点灯を実施する。   On the other hand, in Patent Document 2, as shown in FIG. 12, switches for bypassing the current flowing through the light emitting blocks 171, 172, 173, 174 are arranged in parallel with the switch block SB including the switches SB_1 to SB_3 arranged in series. An AC drive LED lighting device including a switch block SA including the switches SA_1 to SA_3 is disclosed. In this AC-driven LED lighting device, (1) in the odd-numbered rectification cycle, a continuous lighting method is performed in which lighting is performed with priority from the lower numbered light emitting blocks (that is, from the left light emitting block 171 with reference to the drawing). . For this purpose, all the switch blocks SB arranged in series are cut off, and lighting is performed using the switch blocks SA arranged in parallel. (2) In the even-numbered rectification cycle, a continuous lighting method in which lighting is performed with priority from the higher-numbered light-emitting blocks (that is, from the right light-emitting block 174 with reference to the drawing) is performed. For this purpose, all the switch blocks SA arranged in parallel are cut off, and lighting is performed using the switch blocks SB arranged in series.

この構成によれば、任意の発光ブロックの点灯期間をプログラムすることが可能となるものの、スイッチを切り替える制御が複雑となり、効果で複雑なスイッチ制御ロジック１７７が必要となる。   According to this configuration, it is possible to program the lighting period of an arbitrary light-emitting block, but the control for switching the switches is complicated, and a complicated switch control logic 177 is required due to the effect.

特開２００６−１４７９３３号公報JP 2006-147933 A 特表２０１４−５０３９５８号公報Special table 2014-503958 gazette

本発明の目的の一は、交流電源を使用する発光ダイオード駆動装置及びこれを用いた照明、漁灯を改良することにある。   An object of the present invention is to improve a light emitting diode driving apparatus using an AC power source, and illumination and fishing lights using the same.

以上の目的を達成するために、本発明の一の側面に係る発光ダイオード駆動装置によれば、交流電源に接続されて、該交流電源の交流電圧を半波整流して第一整流電圧を得るための第一半波整流回路と、前記第一半波整流回路の出力側と直列に接続された、少なくとも一のＬＥＤ素子を含む第一ＬＥＤ部と、前記第一ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第二ＬＥＤ部と、前記第二ＬＥＤ部と並列で、且つ前記第一ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部への通電量を制御するための第一通電制御部と、前記第一ＬＥＤ部及び第二ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部及び前記第二ＬＥＤ部への通電量を制御するための第二通電制御部と、第一整流電圧が印加される状態で、前記第一ＬＥＤ部を流れる電流値に基づいて、前記第一通電制御部及び第二通電制御部を制御するための第一電流制御部と、共通の交流電源に接続されて、該交流電源の交流電圧を前記第一半波整流回路と異なるタイミングで半波整流して第二整流電圧を得るための第二半波整流回路と、前記第一ＬＥＤ部と並列で、且つ前記第二ＬＥＤ部と直列に接続された、第二整流電圧が印加される状態で前記第二ＬＥＤ部への通電量を制御するための第六通電制御部と、前記第二半波整流回路の出力側と前記第一ＬＥＤ部との間で前記第一ＬＥＤ部と直列に接続された、第二整流電圧が印加される状態で前記第一ＬＥＤ部及び第二ＬＥＤ部への通電量を制御するための第五通電制御部と、第二整流電圧が印加される状態で、前記第二ＬＥＤ部を流れる電流値に基づいて、前記第五通電制御部及び第六通電制御部を制御するための第二電流制御部とを備えることができる。   In order to achieve the above object, a light emitting diode driving apparatus according to one aspect of the present invention is connected to an AC power supply and half-wave rectifies the AC voltage of the AC power supply to obtain a first rectified voltage. First half wave rectifier circuit, a first LED part including at least one LED element connected in series with the output side of the first half wave rectifier circuit, and connected in series with the first LED part In addition, the second LED unit including at least one LED element, the first LED in parallel with the second LED unit, and connected in series with the first LED unit, the first rectified voltage being applied. A first energization control unit for controlling an energization amount to the LED unit, and the first LED unit connected in series with the first LED unit and the second LED unit in a state where a first rectified voltage is applied. And second energization for controlling the energization amount to the second LED section And a first current control unit for controlling the first energization control unit and the second energization control unit based on a current value flowing through the first LED unit in a state where the first rectified voltage is applied. And a second half-wave rectifier circuit that is connected to a common AC power source and obtains a second rectified voltage by half-wave rectifying the AC voltage of the AC power source at a timing different from that of the first half-wave rectifier circuit; A sixth energization control for controlling the energization amount to the second LED unit in a state where a second rectified voltage is applied in parallel with the first LED unit and in series with the second LED unit. And the first LED unit connected in series with the first LED unit between the output side of the second half-wave rectifier circuit and the first LED unit in a state where a second rectified voltage is applied. And a fifth energization control unit for controlling the energization amount to the second LED unit, and a second rectified voltage In a state of being pressurized, can be provided with said second of the LED unit on the basis of the current flowing, the fifth power supply controller and the second current control unit for controlling the sixth power supply control unit.

本発明の他の側面に係る発光ダイオード駆動装置によれば、交流電源に接続されて、該交流電源の交流電圧を半波整流して第一整流電圧を得るための第一半波整流回路と、前記第一半波整流回路の出力側と直列に接続された、少なくとも一のＬＥＤ素子を含む第一ＬＥＤ部と、前記第一ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第二ＬＥＤ部と、前記第二ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第三ＬＥＤ部と、前記第二ＬＥＤ部と並列で、且つ前記第一ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部への通電量を制御するための第一通電制御部と、前記第一ＬＥＤ部及び第二ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部及び前記第二ＬＥＤ部への通電量を制御するための第二通電制御部と、前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部への通電量を制御するための第三通電制御部と、第一整流電圧が印加される状態で、前記第一ＬＥＤ部を流れる電流値に基づいて、前記第一通電制御部、第二通電制御部及び第三通電制御部を制御するための第一電流制御部と、共通の交流電源に接続されて、該交流電源の交流電圧を前記第一半波整流回路と異なるタイミングで半波整流して第二整流電圧を得るための第二半波整流回路と、前記第三ＬＥＤ部から見て、該第三ＬＥＤ部と直列で、且つ前記第二ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第三ＬＥＤ部への通電量を制御するための第七通電制御部と、前記第二ＬＥＤ部から見て、該第二ＬＥＤ部と直列で、且つ前記第一ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第二ＬＥＤ部及び第三ＬＥＤ部への通電量を制御するための第六通電制御部と、前記第二半波整流回路の出力側と前記第一ＬＥＤ部との間で前記第一ＬＥＤ部と直列に接続された、第二整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部への通電量を制御するための第五通電制御部と、第二整流電圧が印加される状態で、前記第三ＬＥＤ部を流れる電流値に基づいて、前記第五通電制御部、第六通電制御部、第七通電制御部及び第八通電制御部を制御するための第二電流制御部と、を備えることができる。   According to a light emitting diode driving device according to another aspect of the present invention, a first half-wave rectifier circuit connected to an AC power source and half-wave rectifying the AC voltage of the AC power source to obtain a first rectified voltage; A first LED unit including at least one LED element connected in series with the output side of the first half-wave rectifier circuit; and at least one LED element connected in series with the first LED unit. A second LED unit, a third LED unit including at least one LED element connected in series with the second LED unit, in parallel with the second LED unit, and connected in series with the first LED unit The first energization control unit for controlling the energization amount to the first LED unit in a state where the first rectified voltage is applied, and the first LED unit and the second LED unit are connected in series. In the state where the first rectified voltage is applied, the first LED unit And a second energization control unit for controlling the energization amount to the second LED unit, and a first rectified voltage connected in series with the first LED unit, the second LED unit, and the third LED unit is applied. In a state where the first LED unit, the second LED unit, and the third LED unit are controlled, a third energization control unit for controlling the energization amount, and a first rectified voltage is applied to the first LED A first current control unit for controlling the first energization control unit, the second energization control unit and the third energization control unit based on a current value flowing through the unit, and a common AC power source connected to the AC A second half-wave rectifier circuit for obtaining a second rectified voltage by half-wave rectifying the AC voltage of the power source at a timing different from that of the first half-wave rectifier circuit; The second rectified voltage connected in series with the second LED unit and in parallel with the second LED unit is applied. A seventh energization control unit for controlling the energization amount to the third LED unit in a state in which the second LED unit is in series with the second LED unit and in parallel with the first LED unit A sixth energization control unit for controlling the energization amount to the second LED unit and the third LED unit in a state in which the second rectified voltage is applied, and an output of the second half-wave rectifier circuit To the first LED unit, the second LED unit, and the third LED unit in a state where a second rectified voltage is applied between the first LED unit and the first LED unit in series. A fifth energization control unit for controlling the energization amount, and a fifth energization control unit and a sixth energization control unit based on a current value flowing through the third LED unit in a state where the second rectified voltage is applied; A second current control unit for controlling the seventh energization control unit and the eighth energization control unit. Yes.

さらに本発明の他の側面に係る発光ダイオード駆動装置によれば、交流電源に接続されて、該交流電源の交流電圧を半波整流して第一整流電圧を得るための第一半波整流回路と、前記第一半波整流回路の出力側と直列に接続された、少なくとも一のＬＥＤ素子を含む第一ＬＥＤ部と、前記第一ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第二ＬＥＤ部と、前記第二ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第三ＬＥＤ部と、前記第三ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第四ＬＥＤ部と、前記第二ＬＥＤ部と並列で、且つ前記第一ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部への通電量を制御するための第一通電制御部と、前記第一ＬＥＤ部及び第二ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部及び前記第二ＬＥＤ部への通電量を制御するための第二通電制御部と、前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部への通電量を制御するための第三通電制御部と、前記第一ＬＥＤ部、第二ＬＥＤ部、第三ＬＥＤ部及び第四ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部、第三ＬＥＤ部及び第四ＬＥＤ部への通電量を制御するための第四通電制御部と、第一整流電圧が印加される状態で、前記第一ＬＥＤ部を流れる電流値に基づいて、前記第一通電制御部、第二通電制御部、第三通電制御部及び第四通電制御部を制御するための第一電流制御部と、共通の交流電源に接続されて、該交流電源の交流電圧を前記第一半波整流回路と異なるタイミングで半波整流して第二整流電圧を得るための第二半波整流回路と、前記第四ＬＥＤ部と直列で、且つ前記第三ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第四ＬＥＤ部への通電量を制御するための第八通電制御部と、前記第三ＬＥＤ部と直列で、且つ前記第二ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第三ＬＥＤ部及び第四ＬＥＤ部への通電量を制御するための第七通電制御部と、前記第二ＬＥＤ部と直列で、且つ前記第一ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第二ＬＥＤ部、第三ＬＥＤ部及び第四ＬＥＤ部への通電量を制御するための第六通電制御部と、前記第二半波整流回路の出力側と前記第一ＬＥＤ部との間で前記第一ＬＥＤ部と直列に接続された、第二整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部、第三ＬＥＤ部及び第四ＬＥＤ部への通電量を制御するための第五通電制御部と、第二整流電圧が印加される状態で、前記第四ＬＥＤ部を流れる電流値に基づいて、前記第五通電制御部、第六通電制御部、第七通電制御部及び第八通電制御部を制御するための第二電流制御部とを備えることができる。   Furthermore, according to the light-emitting diode driving device according to another aspect of the present invention, the first half-wave rectifier circuit is connected to the AC power source and half-wave rectifies the AC voltage of the AC power source to obtain the first rectified voltage. A first LED unit including at least one LED element connected in series with the output side of the first half-wave rectifier circuit, and at least one LED element connected in series with the first LED unit. A second LED part including, a third LED part connected in series with the second LED part, including at least one LED element, and at least one LED element connected in series with the third LED part. Including the fourth LED unit including the second LED unit and connected in series with the first LED unit, the amount of current supplied to the first LED unit is controlled in a state where the first rectified voltage is applied. A first energization control unit to perform the first L A second energization control unit for controlling the energization amount to the first LED unit and the second LED unit in a state where the first rectified voltage is applied, connected in series with the D unit and the second LED unit; The first LED unit, the second LED unit, and the third LED unit are connected in series, and the first rectified voltage is applied to the first LED unit, the second LED unit, and the third LED unit. A state in which a first rectification voltage is applied, which is connected in series with the third energization control unit for controlling the energization amount, and the first LED unit, the second LED unit, the third LED unit, and the fourth LED unit. And a fourth energization control unit for controlling the energization amount to the first LED unit, the second LED unit, the third LED unit, and the fourth LED unit; The first energization control unit, the second energization control unit, the third A first current control unit for controlling the power supply control unit and the fourth current supply control unit and a common AC power supply, and the AC voltage of the AC power supply is half-waved at a timing different from that of the first half-wave rectifier circuit. Second half-wave rectifier circuit for rectifying and obtaining a second rectified voltage, a state in which a second rectified voltage is applied in series with the fourth LED unit and in parallel with the third LED unit An eighth energization control unit for controlling the energization amount to the fourth LED unit, a second rectified voltage connected in series with the third LED unit and in parallel with the second LED unit is applied A seventh energization control unit for controlling the energization amount to the third LED unit and the fourth LED unit, and the second LED unit in series and in parallel with the first LED unit. In addition, the second LED unit, the third LED unit and the second LED unit in a state where the second rectified voltage is applied. A sixth energization control unit for controlling the energization amount to the four LED units, and the first LED unit connected in series between the output side of the second half-wave rectifier circuit and the first LED unit A fifth energization control unit for controlling the energization amount to the first LED unit, the second LED unit, the third LED unit, and the fourth LED unit in a state where the second rectification voltage is applied; In order to control the fifth energization control unit, the sixth energization control unit, the seventh energization control unit, and the eighth energization control unit based on the current value flowing through the fourth LED unit in a state where a voltage is applied. And a second current control unit.

上記構成によれば、直列接続された第一ＬＥＤ部及び第二ＬＥＤ部に対して、これらを点灯駆動する回路を、第一整流電圧で動作される回路群と、第二整流電圧で動作される回路群の２つを用意し、第一整流電圧と第二整流電圧の各半波整流区間で点灯する制御を異ならせることで、第一ＬＥＤ部と第二ＬＥＤ部の点灯時間を均一化でき、発光むらを低減した高品質な発光を実現できる。   According to the above configuration, for the first LED unit and the second LED unit connected in series, the circuit for lighting and driving them is operated with the circuit group operated with the first rectified voltage and the second rectified voltage. The two LED groups are prepared, and the lighting time of the first LED part and the second LED part is made uniform by changing the lighting control in each half-wave rectification section of the first rectified voltage and the second rectified voltage. And high-quality light emission with reduced unevenness of light emission can be realized.

実施形態１に係る発光ダイオード駆動装置を示すブロック図である。1 is a block diagram illustrating a light emitting diode driving device according to Embodiment 1. FIG. 実施形態２に係る発光ダイオード駆動装置を示すブロック図である。6 is a block diagram showing a light emitting diode driving apparatus according to Embodiment 2. FIG. 実施形態３に係る発光ダイオード駆動装置を示すブロック図である。It is a block diagram which shows the light emitting diode drive device which concerns on Embodiment 3. FIG. 実施形態４に係る発光ダイオード駆動装置を示すブロック図である。It is a block diagram which shows the light emitting diode drive device which concerns on Embodiment 4. 実施形態５に係る発光ダイオード駆動装置を示すブロック図である。FIG. 10 is a block diagram illustrating a light emitting diode driving device according to a fifth embodiment. 実施例１に係る発光ダイオード駆動装置の回路図である。1 is a circuit diagram of a light-emitting diode driving apparatus according to Example 1. FIG. 本発明者が先に開発した発光ダイオード駆動装置を示すブロック図である。It is a block diagram which shows the light emitting diode drive device which this inventor developed previously. 図８Ａは図７の発光ダイオード駆動装置の点灯駆動時における電源電圧と各ＬＥＤの点灯期間との関係を示すグラフ、図８Ｂは実施例１に係る発光ダイオード駆動装置の電源電圧と各ＬＥＤの点灯期間との関係を示すグラフである。8A is a graph showing the relationship between the power supply voltage and the lighting period of each LED during the lighting drive of the light emitting diode driving device of FIG. 7, and FIG. 8B is the power supply voltage of the light emitting diode driving device according to Example 1 and the lighting of each LED. It is a graph which shows the relationship with a period. 実施例２に係る発光ダイオード駆動装置の回路図である。6 is a circuit diagram of a light-emitting diode driving apparatus according to Example 2. FIG. マイクロコンピュータを使用したＬＥＤ点灯回路例を示す回路図である。It is a circuit diagram which shows the LED lighting circuit example which uses a microcomputer. 図１０のＬＥＤ点灯回路の動作を示すタイミングチャートである。It is a timing chart which shows operation | movement of the LED lighting circuit of FIG. 逆循環点灯法に適した交流駆動ＬＥＤ照明装置を示すブロック図である。It is a block diagram which shows the alternating current drive LED illuminating device suitable for a reverse circulation lighting method.

以下、本発明の一実施の形態を図面に基づいて説明する。ただし、以下に示す実施の形態は、本発明の技術思想を具体化するためのものであって、本発明は以下のものに特定されない。また、本明細書は特許請求の範囲に示される部材を、実施の形態の部材に特定するものでは決してない。特に実施の形態に記載されている構成、構成部品の寸法、材質、形状、その相対的配置等は特に特定的な記載がない限りは、本発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例にすぎない。なお、各図面が示す部材の大きさや位置関係等は、説明を明確にするため誇張していることがある。さらに以下の説明において、同一の名称、符号については同一もしくは同質の部材を示しており、詳細説明を適宜省略する。さらに、本発明を構成する各要素は、複数の要素を同一の部材で構成して一の部材で複数の要素を兼用する態様としてもよいし、逆に一の部材の機能を複数の部材で分担して実現することもできる。なお、本明細書において「直列に接続される」とは、間に他の部材が介在される態様を含む場合もある。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the embodiment described below is for embodying the technical idea of the present invention, and the present invention is not limited to the following. Further, the present specification by no means specifies the members shown in the claims to the members of the embodiments. In particular, unless otherwise specified, the configuration, dimensions, materials, shapes, and relative arrangements of the components described in the embodiments are not intended to limit the scope of the present invention. It is just an illustrative example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. In the present specification, “connected in series” may include a mode in which other members are interposed therebetween.

一実施形態によれば、上記いずれかの構成に加えて、前記第一電流制御部は、前記第一半波整流回路の出力側から第一整流電圧が印加される状態で、前記第一ＬＥＤ部を点灯させ、次いで該第一ＬＥＤ部を点灯させたまま前記第二ＬＥＤ部を点灯させ、さらに該第一ＬＥＤ部を点灯させたまま前記第二ＬＥＤ部を消灯させるよう点灯駆動させ、前記第二電流制御部は、前記第二半波整流回路の出力側から第二整流電圧が印加される状態で、前記第二ＬＥＤ部を点灯させ、次いで該第二ＬＥＤ部を点灯させたまま前記第一ＬＥＤ部を点灯させ、さらに該第二ＬＥＤ部を点灯させたまま前記第一ＬＥＤ部を消灯させるよう点灯駆動させることができる。上記構成により、直列接続された第一ＬＥＤ部及び第二ＬＥＤ部に対して、第一整流電圧で動作される回路群と、第二整流電圧で動作される回路群をそれぞれ接続し、共通の交流電源から半波整流された第一半波区間と、第二半波区間で、それぞれ第一ＬＥＤ部と第二ＬＥＤ部を点灯させる順序を逆の順序とすることにより、第一ＬＥＤ部と第二ＬＥＤ部の点灯時間を均一化でき、発光むらを低減した高品質な発光を実現できる。   According to one embodiment, in addition to any of the above-described configurations, the first current control unit is configured to apply the first LED in a state where a first rectified voltage is applied from an output side of the first half-wave rectifier circuit. The second LED part is turned on while the first LED part is turned on, and the second LED part is turned off while the first LED part is turned on. The second current control unit turns on the second LED unit in a state where the second rectified voltage is applied from the output side of the second half-wave rectifier circuit, and then turns on the second LED unit while turning on the second LED unit. The first LED portion can be turned on, and the first LED portion can be turned off while the second LED portion is turned on. With the above configuration, the circuit group operated with the first rectified voltage and the circuit group operated with the second rectified voltage are connected to the first LED unit and the second LED unit connected in series, respectively. In the first half-wave section and the second half-wave section that are half-wave rectified from the AC power supply, the first LED section and the second LED section are turned on in reverse order, The lighting time of the second LED unit can be made uniform, and high-quality light emission with reduced light emission unevenness can be realized.

他の実施形態によれば、上記いずれかの構成に加えて、さらに前記第二ＬＥＤ部の下流側に直列接続された、前記第一ＬＥＤ部を流れる電流量を検出するための第一電流検出器を備えることができる。   According to another embodiment, in addition to any one of the configurations described above, the first current detection for detecting the amount of current flowing through the first LED unit, which is further connected in series on the downstream side of the second LED unit. Can be provided.

また、上記いずれかの構成に加えて、さらに前記第一ＬＥＤ部の上流側に直列接続された、前記第二ＬＥＤ部を流れる電流量を検出するための第二電流検出器を備えることもできる。   Further, in addition to any of the above-described configurations, a second current detector for detecting the amount of current flowing through the second LED unit, which is connected in series on the upstream side of the first LED unit, may be provided. .

さらにまた、上記いずれかの構成に加えて、前記第一ＬＥＤ部及び第二ＬＥＤ部の直列接続体に対して、並列に接続された平滑コンデンサを備えることもできる。   Furthermore, in addition to any one of the configurations described above, a smoothing capacitor connected in parallel to the series connection body of the first LED unit and the second LED unit may be provided.

上記何れかの構成を備えた発光ダイオード駆動装置で駆動される漁灯や、発光ダイオード駆動装置で駆動される照明とすることもできる。
＜実施形態１＞ It can also be set as the fishing light driven with the light emitting diode drive device provided with one of the said structures, and the illumination driven with a light emitting diode drive device.
<Embodiment 1>

図１に、本発明の実施形態１に係る発光ダイオード駆動装置１００のブロック図を示す。この図に示す発光ダイオード駆動装置１００は、単相の交流電源ＡＰにそれぞれ接続される第一半波整流回路５１、第二半波整流回路５２と、第一ＬＥＤ部１１と、第二ＬＥＤ部１２と、第一通電制御部２１と、第二通電制御部２２と、第五通電制御部２５と、第六通電制御部２６と、第一電流制御部３１と、第二電流制御部３２と、第一電流検出器４１と、第二電流検出器４２とを備える。   FIG. 1 shows a block diagram of a light-emitting diode driving apparatus 100 according to Embodiment 1 of the present invention. The light-emitting diode driving device 100 shown in this figure includes a first half-wave rectifier circuit 51, a second half-wave rectifier circuit 52, a first LED unit 11, and a second LED unit that are respectively connected to a single-phase AC power supply AP. 12, first energization control unit 21, second energization control unit 22, fifth energization control unit 25, sixth energization control unit 26, first current control unit 31, and second current control unit 32 The first current detector 41 and the second current detector 42 are provided.

第一半波整流回路５１は、単相の交流電源ＡＰに接続されて、この交流電源ＡＰの交流電圧を半波整流して第一整流電圧を得るための回路である。   The first half-wave rectifier circuit 51 is connected to a single-phase AC power supply AP, and is a circuit for obtaining a first rectified voltage by half-wave rectifying the AC voltage of the AC power supply AP.

また第二半波整流回路５２は、同じ交流電源ＡＰに接続されて、この交流電源ＡＰの交流電圧を半波整流して第二整流電圧を得るための回路である。第二半波整流回路５２が交流電圧を半波整流するタイミングは、第一半波整流回路５１が半波整流するタイミングと異なるタイミング、すなわち第一半波整流回路５１が半波整流していないタイミングとする。この結果、第一整流電圧と第二整流電圧は正位相と逆位相の関係となる。ここでは第一半波整流回路５１で半波整流された第一整流電圧と、第二半波整流回路５２で半波整流された第二整流電圧は、１８０°位相をずらしている。   The second half-wave rectifier circuit 52 is connected to the same AC power supply AP and is a circuit for obtaining a second rectified voltage by half-wave rectifying the AC voltage of the AC power supply AP. The timing at which the second half-wave rectifier circuit 52 half-rectifies the AC voltage is different from the timing at which the first half-wave rectifier circuit 51 performs half-wave rectification, that is, the first half-wave rectifier circuit 51 does not perform half-wave rectification. Timing. As a result, the first rectified voltage and the second rectified voltage have a relationship of positive phase and reverse phase. Here, the first rectified voltage half-wave rectified by the first half-wave rectifier circuit 51 and the second rectified voltage half-wave rectified by the second half-wave rectifier circuit 52 are shifted in phase by 180 °.

第一ＬＥＤ部１１、第二ＬＥＤ部１２はそれぞれ、少なくとも一のＬＥＤ素子を含んでおり、一以上のＬＥＤ素子を直列に接続している。これら第一ＬＥＤ部１１と第二ＬＥＤ部１２は、直列に接続されてＬＥＤ集合体１０を構成している。また第一ＬＥＤ部１１から第二ＬＥＤ部１２に?がるラインを出力ラインＯＬとする。   Each of the first LED unit 11 and the second LED unit 12 includes at least one LED element, and one or more LED elements are connected in series. The first LED unit 11 and the second LED unit 12 are connected in series to form the LED assembly 10. A line extending from the first LED unit 11 to the second LED unit 12 is defined as an output line OL.

出力ラインＯＬは、第一半波整流回路５１の出力側、第二半波整流回路５２の出力側に、それぞれ接続されている。出力ラインＯＬ側から見て、第一半波整流回路５１と第二半波整流回路５２は、並列となっている。ただし図１の例では、第二半波整流回路５２の出力側と、第一ＬＥＤ部１１との間には、第五通電制御部２５と第二電流検出器４２が介在されている。
（第一回路群１） The output line OL is connected to the output side of the first half-wave rectifier circuit 51 and the output side of the second half-wave rectifier circuit 52, respectively. As viewed from the output line OL side, the first half-wave rectifier circuit 51 and the second half-wave rectifier circuit 52 are in parallel. However, in the example of FIG. 1, the fifth energization control unit 25 and the second current detector 42 are interposed between the output side of the second half-wave rectifier circuit 52 and the first LED unit 11.
(First circuit group 1)

さらに出力ラインＯＬに接続された第一ＬＥＤ部１１と第二ＬＥＤ部１２を含むＬＥＤ集合体１０には、第一半波整流回路５１で半波整流された第一整流電圧で動作される第一回路群１を接続している。具体的には、第一回路群１は第一通電制御部２１、第二通電制御部２２、及びこれらを制御する第一電流制御部３１、第一電流検出器４１を備える。   Further, the LED assembly 10 including the first LED unit 11 and the second LED unit 12 connected to the output line OL is operated with the first rectified voltage half-wave rectified by the first half-wave rectifier circuit 51. One circuit group 1 is connected. Specifically, the first circuit group 1 includes a first energization control unit 21, a second energization control unit 22, a first current control unit 31 that controls them, and a first current detector 41.

第一通電制御部２１は、第一ＬＥＤ部１１から見て、第一ＬＥＤ部１１と直列で、かつ第二ＬＥＤ部１２と並列に接続されている。この第一通電制御部２１は、第一整流電圧が印加される状態で、第一ＬＥＤ部１１への通電量を制御するための部材であり、第一バイパス部として機能する。   The first energization control unit 21 is connected in series with the first LED unit 11 and in parallel with the second LED unit 12 as viewed from the first LED unit 11. The first energization control unit 21 is a member for controlling the energization amount to the first LED unit 11 in a state where the first rectified voltage is applied, and functions as a first bypass unit.

また第二通電制御部２２は、第二ＬＥＤ部１２から見て、第二ＬＥＤ部１２と直列に接続されている。この第二通電制御部２２は、第一整流電圧が印加される状態で、第一ＬＥＤ部１１及び第二ＬＥＤ部１２への通電量を制御するための部材であり、第二バイパス部あるいは第一電流制限部として機能する。   The second energization control unit 22 is connected in series with the second LED unit 12 as viewed from the second LED unit 12. The second energization control unit 22 is a member for controlling the energization amount to the first LED unit 11 and the second LED unit 12 in a state where the first rectified voltage is applied, and the second bypass unit or the second It functions as a current limiter.

また第一電流制御部３１は、第一整流電圧が印加される状態で、出力ラインＯＬを流れる電流値に基づいて、第一通電制御部２１及び第二通電制御部２２を制御するための部材である。出力ラインＯＬを流れる電流を検出するために、図１の例では第一電流検出器４１を出力ラインＯＬ上に設けている。ここでは、第二通電制御部２２と接地端の間に、第一電流検出器４１を配置している。いいかえると、第一電流検出器４１は、第二ＬＥＤ部１２の下流側に、第二通電制御部２２を介して直列接続されている。この構成では、第一整流電圧が印加される状態では、後述する第二回路群２がＯＦＦ状態であるから、出力ラインＯＬを流れる電流は、第一ＬＥＤ部１１を流れる電流と等しくなる。
（第二回路群２） The first current control unit 31 is a member for controlling the first energization control unit 21 and the second energization control unit 22 based on the current value flowing through the output line OL in a state where the first rectified voltage is applied. It is. In order to detect the current flowing through the output line OL, the first current detector 41 is provided on the output line OL in the example of FIG. Here, the 1st electric current detector 41 is arrange | positioned between the 2nd electricity supply control part 22 and the earthing | grounding end. In other words, the first current detector 41 is connected in series via the second energization control unit 22 on the downstream side of the second LED unit 12. In this configuration, in a state where the first rectified voltage is applied, the second circuit group 2 described later is in an OFF state, so that the current flowing through the output line OL is equal to the current flowing through the first LED unit 11.
(Second circuit group 2)

さらに出力ラインＯＬに接続されたＬＥＤ集合体１０には、第一回路群１後とは別に、第二半波整流回路５２で半波整流された第二整流電圧で動作される第二回路群２を接続している。具体的には、第二回路群２は第六通電制御部２６、第五通電制御部２５、及びこれらを制御する第二電流制御部３２、第二電流検出器４２を備える。   Further, the LED assembly 10 connected to the output line OL has a second circuit group operated by the second rectified voltage half-wave rectified by the second half-wave rectifier circuit 52 separately from the first circuit group 1. 2 is connected. Specifically, the second circuit group 2 includes a sixth energization control unit 26, a fifth energization control unit 25, a second current control unit 32 that controls these, and a second current detector 42.

第六通電制御部２６は、第二ＬＥＤ部１２から見て、第二ＬＥＤ部１２と直列で、かつ第一ＬＥＤ部１１と並列に接続されている。この第六通電制御部２６は、第二整流電圧が印加される状態で、第二ＬＥＤ部１２への通電量を制御するための部材であり、第六バイパス部として機能する。   The sixth energization control unit 26 is connected in series with the second LED unit 12 and in parallel with the first LED unit 11 as viewed from the second LED unit 12. The sixth energization control unit 26 is a member for controlling the energization amount to the second LED unit 12 in a state where the second rectified voltage is applied, and functions as a sixth bypass unit.

また第五通電制御部２５は、第一ＬＥＤ部１１から見て、第一ＬＥＤ部１１と直列に接続されている。いいかえると、第二半波整流回路５２の出力側と第一ＬＥＤ部１１との間で直列に接続されている。この第五通電制御部２５は、第二整流電圧が印加される状態で、第二ＬＥＤ部１２及び第一ＬＥＤ部１１への通電量を制御するための部材であり、第五バイパス部あるいは第二電流制限部として機能する。   The fifth energization control unit 25 is connected in series with the first LED unit 11 when viewed from the first LED unit 11. In other words, it is connected in series between the output side of the second half-wave rectifier circuit 52 and the first LED unit 11. The fifth energization control unit 25 is a member for controlling the energization amount to the second LED unit 12 and the first LED unit 11 in a state where the second rectified voltage is applied, and the fifth energization control unit 25 Functions as a two-current limiting unit.

また第二電流制御部３２は、第二整流電圧が印加される状態で、出力ラインＯＬを流れる電流値に基づいて、第六通電制御部２６及び第五通電制御部２５を制御するための部材である。出力ラインＯＬを流れる電流を検出するために、図１の例では第二電流検出器４２を出力ラインＯＬ上に設けている。ここでは、第五通電制御部２５と第二半波整流回路５２の出力側との間に、第二電流検出器４２を配置している。いいかえると、第二電流検出器４２は、第一ＬＥＤ部１１の上流側に、第五通電制御部２５を介して直列接続されている。この構成では、第二整流電圧が印加される状態では、第一回路群１がＯＦＦ状態であるから、出力ラインＯＬを流れる電流は、第二ＬＥＤ部１２を流れる電流と等しくなる。   The second current control unit 32 is a member for controlling the sixth energization control unit 26 and the fifth energization control unit 25 based on the current value flowing through the output line OL in a state where the second rectified voltage is applied. It is. In order to detect the current flowing through the output line OL, the second current detector 42 is provided on the output line OL in the example of FIG. Here, the second current detector 42 is disposed between the fifth energization control unit 25 and the output side of the second half-wave rectifier circuit 52. In other words, the second current detector 42 is connected in series via the fifth energization control unit 25 on the upstream side of the first LED unit 11. In this configuration, when the second rectified voltage is applied, the first circuit group 1 is in the OFF state, so that the current flowing through the output line OL is equal to the current flowing through the second LED unit 12.

以上の発光ダイオード駆動装置１００は、直列接続された第一ＬＥＤ部１１及び第二ＬＥＤ部１２を有するＬＥＤ集合体１０に対して、これらを点灯駆動する回路として、第一整流電圧で動作される第一回路群１と、第二整流電圧で動作される第二回路群２の２つを用意している。図１の例では、第一回路群１と、第二回路群２は、いずれもＬＥＤ集合体１０を含んでおり、ＬＥＤ集合体１０に対して左側に第一回路群１を構成する第一通電制御部２１などの部材を配置し、右側に第二回路群２を構成する第六通電制御部２６などを配置している。そして、第一回路群１を駆動する第一整流電圧と、第二回路群２を駆動する第二整流電圧の各半波整流区間で点灯する制御を異ならせることで、ＬＥＤ集合体１０を構成する第一ＬＥＤ部１１と第二ＬＥＤ部１２の点灯時間を均一化でき、発光むらを低減した高品質な発光を実現できる。具体的には、単相の交流電源ＡＰに接続された第一半波整流回路５１で、交流電圧を整流した第一整流電圧を得る。この整流電圧が第一ＬＥＤ部１１を点灯できる電圧まで上昇すると、第一電流制御部３１は、第一ＬＥＤ部１１を予め設定された適切な駆動電流で点灯させ、次いで第一整流電圧がさらに第一ＬＥＤ部と第二ＬＥＤ部を共に点灯できる電圧に上昇すると、第一通電制御部の端子間電圧が第二ＬＥＤ部のＶfを超えると（第一通電制御部は遮断され）、この第一ＬＥＤ部１１を点灯させたまま第二ＬＥＤ部１２を適切な駆動電流で点灯させ、第一整流電圧がピークを越え、第一及び第二ＬＥＤ部を共に点灯できる電圧を下回ると、さらにこの第一ＬＥＤ部１１を点灯させたまま第二ＬＥＤ部１２を消灯させ、さらに第一整流電圧が下降し、点灯できる電圧を下回ると該第一ＬＥＤ部１１を消灯させるよう点灯駆動させる。   The light emitting diode driving device 100 described above is operated at the first rectified voltage as a circuit for lighting and driving the LED assembly 10 having the first LED unit 11 and the second LED unit 12 connected in series. Two circuits are prepared: a first circuit group 1 and a second circuit group 2 operated by a second rectified voltage. In the example of FIG. 1, the first circuit group 1 and the second circuit group 2 both include the LED assembly 10, and the first circuit group 1 is configured on the left side of the LED assembly 10. Members such as the energization control unit 21 are arranged, and a sixth energization control unit 26 constituting the second circuit group 2 is arranged on the right side. Then, the LED assembly 10 is configured by changing the lighting control in each half-wave rectification section of the first rectified voltage for driving the first circuit group 1 and the second rectified voltage for driving the second circuit group 2. The lighting time of the 1st LED part 11 and the 2nd LED part 12 to perform can be equalize | homogenized, and high quality light emission which reduced the light emission nonuniformity is realizable. Specifically, the first half-wave rectifier circuit 51 connected to the single-phase AC power supply AP obtains a first rectified voltage obtained by rectifying the AC voltage. When this rectified voltage rises to a voltage at which the first LED unit 11 can be lit, the first current control unit 31 lights the first LED unit 11 with a preset appropriate drive current, and then the first rectified voltage further increases. When the first LED unit and the second LED unit rise to a voltage that can be turned on, the voltage between the terminals of the first energization control unit exceeds Vf of the second LED unit (the first energization control unit is shut off). When the second LED unit 12 is lit with an appropriate drive current while the one LED unit 11 is lit, the first rectified voltage exceeds the peak and falls below the voltage at which both the first and second LED units can be lit. The second LED unit 12 is turned off while the first LED unit 11 is lit, and the first LED unit 11 is turned on so that the first LED unit 11 is turned off when the first rectified voltage drops and falls below a voltage that can be turned on.

次に第二半波整流回路５２で、交流電圧の内、第一半波整流回路５１とは逆位相の波形を整流した第二整流電圧を得る。この整流電圧が第二ＬＥＤ部１２を点灯できる電圧まで上昇すると、第二電流制御部３２は、第二ＬＥＤ部１２を予め設定された適切な駆動電流で点灯させる。次いで第二整流電圧がさらに第一ＬＥＤ部と第二ＬＥＤ部を共に点灯できる電圧に上昇すると、第六通電制御部の端子間電圧が第一ＬＥＤ部のＶfを超え（第六通電制御部は遮断され）、この第二ＬＥＤ部１２を点灯させたまま第一ＬＥＤ部１１を適切な駆動電流で点灯させ、第二整流電圧がピークを越え、第一及び第二ＬＥＤ部を共に点灯できる電圧を下回ると、さらにこの第二ＬＥＤ部１２を点灯させたまま第一ＬＥＤ部１１を消灯させ、さらに第二整流電圧が下降し、点灯できる電圧を下回ると該第二ＬＥＤ部１２を消灯させる。このように、共通の交流電源ＡＰから半波整流された第一半波整流区間と第二半波整流区間で、それぞれ第一ＬＥＤ部１１と第二ＬＥＤ部１２を点灯させる順序を逆の順序とすることにより、第一ＬＥＤ部１１と第二ＬＥＤ部１２の点灯時間を均一化でき、発光むらを低減した高品質な発光を実現できる。
（第一通電制御部２１） Next, the second half-wave rectifier circuit 52 obtains a second rectified voltage obtained by rectifying a waveform having an opposite phase to that of the first half-wave rectifier circuit 51 in the AC voltage. When the rectified voltage rises to a voltage at which the second LED unit 12 can be turned on, the second current control unit 32 turns on the second LED unit 12 with an appropriate driving current set in advance. Next, when the second rectified voltage further rises to a voltage at which both the first LED unit and the second LED unit can be lit, the voltage between the terminals of the sixth energization control unit exceeds Vf of the first LED unit (the sixth energization control unit is The first LED unit 11 is lit with an appropriate drive current while the second LED unit 12 is lit, and the second rectified voltage exceeds the peak, and the first and second LED units can be lit together. If the value is less than, the first LED unit 11 is turned off while the second LED unit 12 is lit, and the second rectified voltage is further lowered. Thus, in the first half-wave rectification section and the second half-wave rectification section that are half-wave rectified from the common AC power supply AP, the order in which the first LED section 11 and the second LED section 12 are lit is reversed. By doing so, the lighting time of the first LED unit 11 and the second LED unit 12 can be made uniform, and high-quality light emission with reduced unevenness in light emission can be realized.
(First energization control unit 21)

以下、各部材について詳細に説明する。第一ＬＥＤ部１１への通電量を制御するための第一通電制御部２１が、第二ＬＥＤ部１２と並列に接続される。第一通電制御部２１は、一端を第一ＬＥＤ部１１の下流側と直列に接続し、他端を第一電流検出器４１の上流側と接続しており、第一ＬＥＤ部１１への通電量を調整するバイパス経路を構成する。すなわち、第一通電制御部２１によってバイパスされる電流量を調整できるので、結果的に第一ＬＥＤ部１１の通電量を制御できる。図１の例では、第二ＬＥＤ部１２と並列に第一通電制御部２１が接続され、第一バイパス経路ＢＰ１を形成する。なおここでいう並列接続とは、各ＬＥＤ部の両端と各通電制御部が接続されていることを要さず、各通電制御部の一端が各ＬＥＤ部の一端と接続されており、電流が分岐されるように構成されていれば足りる。例えば図１の例では、第一通電制御部２１はその一端を第二ＬＥＤ部１２の上流側と接続し、他端を出力ラインＯＬ上で、第一電流検出器４１の上流側と接続している。このように各通電制御部の並列接続とは、出力ラインＯＬ上に接続された各ＬＥＤ部の電流を分岐させるような接続形態を指す意味で使用する。   Hereinafter, each member will be described in detail. A first energization control unit 21 for controlling the energization amount to the first LED unit 11 is connected in parallel with the second LED unit 12. The first energization control unit 21 has one end connected in series with the downstream side of the first LED unit 11 and the other end connected to the upstream side of the first current detector 41, and energization to the first LED unit 11. Configure a bypass path to adjust the amount. That is, since the amount of current bypassed by the first energization control unit 21 can be adjusted, the energization amount of the first LED unit 11 can be controlled as a result. In the example of FIG. 1, a first energization control unit 21 is connected in parallel with the second LED unit 12 to form a first bypass path BP1. In addition, the parallel connection here does not require that both ends of each LED unit and each energization control unit are connected, and one end of each energization control unit is connected to one end of each LED unit, and the current flows. It is sufficient if it is configured to be branched. For example, in the example of FIG. 1, the first energization control unit 21 has one end connected to the upstream side of the second LED unit 12 and the other end connected to the upstream side of the first current detector 41 on the output line OL. ing. As described above, the parallel connection of the energization control units is used to indicate a connection form in which the current of each LED unit connected on the output line OL is branched.

第一通電制御部２１は、例えば第一ＬＥＤ部１１を流れる電流をバイパスさせるバイパス部と、このバイパス部の動作を制御する電流制御部とで構成できる。ここで通電制御部は、ＬＥＤ部の電流駆動を行う電流回路の制御用の部材である。例えば、第一通電制御部２１と、この第一通電制御部２１の動作、すなわちＯＮ／ＯＦＦや電流量連続可変といった動作を制御する第一電流制御部３１とで、一種の定電流回路が構成される。この定電流回路の制御は、例えば出力ラインＯＬに接続された第一電流検出器４１を用いてＬＥＤ集合体１０の電流量をモニタし、この値に基づいて第一電流制御部３１がバイパス部の制御量を切り替える。なお、このように第一通電制御部を、バイパス部と電流制御部とで構成する他、一体的に第一通電制御部として構成してもよい。このような第一通電制御部は、トランジスタ等の半導体駆動素子で構成できる。   The 1st electricity supply control part 21 can be comprised by the bypass part which bypasses the electric current which flows through the 1st LED part 11, for example, and the current control part which controls operation | movement of this bypass part. Here, the energization control unit is a member for controlling a current circuit that performs current driving of the LED unit. For example, a kind of constant current circuit is configured by the first energization control unit 21 and the first current control unit 31 that controls the operation of the first energization control unit 21, that is, the operation such as ON / OFF and continuously variable current amount. Is done. The constant current circuit is controlled by monitoring the amount of current of the LED assembly 10 using, for example, a first current detector 41 connected to the output line OL, and the first current control unit 31 is bypassed based on this value. Switch the control amount. The first energization control unit may be configured as a first energization control unit in addition to the bypass unit and the current control unit. Such a first energization control unit can be composed of a semiconductor drive element such as a transistor.

同じく第二回路群２を構成する第六ＬＥＤ部１６への通電量を制御するための第六通電制御部２６が、第一ＬＥＤ部１１と並列に接続される。第六通電制御部２６は、一端を第二ＬＥＤ部１２の上流側と直列に接続し、他端を第二電流検出器４２の下流側と接続しており、第六通電制御部２６によってバイパスされる電流量を調整することで第二ＬＥＤ部１２への通電量を調整するバイパス経路を構成する。図１の例では、第一ＬＥＤ部１１と並列に第六通電制御部２６が接続され、第六バイパス経路ＢＰ８を形成する。また第六通電制御部２６と、この第六通電制御部２６の動作を制御する第二電流制御部３２とで、一種の定電流回路が構成される。この定電流回路の制御は、例えば出力ラインＯＬに接続された第二電流検出器４２を用いてＬＥＤ集合体１０の電流量をモニタし、この値に基づいて第二電流制御部３２がバイパス部の制御量を切り替える。具体的には、第一ＬＥＤ部とそれに並列配置された第六通電制御部、あるいは第二ＬＥＤとそれに並列配置された第一通電制御部は、それぞれ第二半波整流回路、第一半波整流回路が動作する時に同じ動作をする。定電流動作（あるいは正弦波に制御）では通電制御部に直列のＬＥＤのＶfと電源電圧の差電圧を通電制御部が消費する（通電制御部の端子間電圧）。電圧が上がってこの消費電圧が、並列のＬＥＤのＶfを超えると、自動的にＬＥＤ側に電流が流れ、このＬＥＤに直列配置された、もう一つの通電制御部に制御が移る。このため、切り替えのタイミングが常に適切に行われ、電源効率が最善に保たれる。
（ＬＥＤ集合体１０） Similarly, a sixth energization control unit 26 for controlling the energization amount to the sixth LED unit 16 constituting the second circuit group 2 is connected in parallel with the first LED unit 11. The sixth energization control unit 26 has one end connected in series with the upstream side of the second LED unit 12 and the other end connected to the downstream side of the second current detector 42, and is bypassed by the sixth energization control unit 26. The bypass path which adjusts the energization amount to the 2nd LED part 12 by adjusting the amount of currents to be constituted is constituted. In the example of FIG. 1, a sixth energization control unit 26 is connected in parallel with the first LED unit 11 to form a sixth bypass path BP8. The sixth energization control unit 26 and the second current control unit 32 that controls the operation of the sixth energization control unit 26 constitute a kind of constant current circuit. The constant current circuit is controlled by monitoring the amount of current in the LED assembly 10 using, for example, the second current detector 42 connected to the output line OL, and the second current control unit 32 is based on this value. Switch the control amount. Specifically, the first LED unit and the sixth energization control unit arranged in parallel with the first LED unit, or the second LED and the first energization control unit arranged in parallel with the second LED, respectively, The same operation is performed when the rectifier circuit operates. In the constant current operation (or controlled to a sine wave), the energization control unit consumes the difference voltage between the LED Vf and the power supply voltage in series with the energization control unit (terminal voltage of the energization control unit). When the voltage rises and this consumption voltage exceeds Vf of the parallel LEDs, a current automatically flows to the LED side, and control is transferred to another energization control unit arranged in series with this LED. For this reason, the timing of switching is always appropriately performed, and the power supply efficiency is kept at the best.
(LED assembly 10)

一方、ＬＥＤ集合体１０を構成する各ＬＥＤ部は、一又は複数のＬＥＤ素子を直列及び／又は並列に接続したブロックである。ＬＥＤ素子は、表面実装型（ＳＭＤ）や砲弾型のＬＥＤが適宜利用できる。またＳＭＤタイプのＬＥＤ素子のパッケージは、用途に応じて外形を選択でき、平面視が矩形状のタイプ等が利用できる。さらに、複数のＬＥＤ素子を共通のパッケージ内で直列及び／又は並列に接続したＬＥＤをＬＥＤ部として使用することも可能であることは言うまでもない。   On the other hand, each LED part constituting the LED assembly 10 is a block in which one or a plurality of LED elements are connected in series and / or in parallel. As the LED element, a surface mount type (SMD) or a bullet type LED can be used as appropriate. Moreover, the package of the SMD type LED element can select the outer shape according to the application, and a rectangular type in a plan view can be used. Furthermore, it goes without saying that an LED in which a plurality of LED elements are connected in series and / or in parallel in a common package can be used as the LED unit.

第一ＬＥＤ部１１に含まれるＬＥＤ素子の順方向電圧の加算値である第一順方向電圧Ｖｆ1は、直列接続されたＬＥＤ素子の個数によって決まる。また第一ＬＥＤ部１１と第二ＬＥＤ部１２を共に点灯させるための第二順方向電圧Ｖｆ2は、この第一順方向電圧Ｖｆ1にさらに、第二ＬＥＤ部１２に含まれる直列接続されたＬＥＤ素子の順方向電圧を加えた値となる。
（第一電流検出器４１） The first forward voltage Vf 1 that is an added value of the forward voltages of the LED elements included in the first LED unit 11 is determined by the number of LED elements connected in series. The second forward voltage Vf 2 for lighting both the first LED unit 11 and the second LED unit 12 is further connected in series to the first forward voltage Vf 1 and included in the second LED unit 12. A value obtained by adding a forward voltage of the LED element.
(First current detector 41)

この発光ダイオード駆動装置１００は、第一整流電圧が印加される第一半波整流区間においては第一電流検出器４１で検出した電流値に基づいて、また第二整流電圧が印加される第二半波整流区間においては第二電流検出器４２で検出した電流値に基づいて、各ＬＥＤ部に対する通電量の制御を行う。いいかえると、整流電圧の電圧値でなく、現実に通電される電流量に基づいた電流制御であるため、ＬＥＤ素子の順方向電圧のばらつきに左右されず、適切なタイミングで正確なＬＥＤ部の切り替えが実現され、信頼性の高い安定した動作が見込まれる。この電流値の検出には、第一電流検出器４１や第二電流検出器４２が利用される。第一電流検出器４１等には、抵抗器等が好適に利用できる。なお図１の例では、第一電流検出器４１は第二通電制御部２２の下流側に接続されているが、この位置に限らず、第一電流検出器は出力ライン上の他の位置に設けてもよい。例えば、後述する第二電流検出器と第一電流検出器を共通化してもよい。
＜実施形態２＞ In the light emitting diode driving device 100, the second rectified voltage is applied based on the current value detected by the first current detector 41 in the first half-wave rectified section where the first rectified voltage is applied. In the half-wave rectification section, the energization amount for each LED unit is controlled based on the current value detected by the second current detector 42. In other words, current control is based on the amount of current that is actually energized rather than the voltage value of the rectified voltage, so it is not affected by variations in the forward voltage of the LED element, and the LED unit can be accurately switched at an appropriate timing. Is realized and stable operation with high reliability is expected. For the detection of this current value, the first current detector 41 and the second current detector 42 are used. A resistor or the like can be suitably used for the first current detector 41 or the like. In the example of FIG. 1, the first current detector 41 is connected to the downstream side of the second energization control unit 22, but the first current detector is not limited to this position, and is located at other positions on the output line. It may be provided. For example, a second current detector and a first current detector described later may be shared.
<Embodiment 2>

図１の例では、ＬＥＤ部を２つ使用し、第一ＬＥＤ部１１、第二ＬＥＤ部１２を直列に接続して、ＬＥＤ集合体１０を構成している。ただ本発明はＬＥＤ部の個数を２個に限定せず、例えばＬＥＤ部を３以上とすることもできる。一例として、ＬＥＤ集合体を第一ＬＥＤ部１１、第二ＬＥＤ部１２、第三ＬＥＤ部１３の３つで構成した例を実施形態２として図２に示す。この図に示す発光ダイオード駆動装置２００は、第一半波整流回路５１、第二半波整流回路５２と、第一ＬＥＤ部１１と、第二ＬＥＤ部１２と、第三ＬＥＤ部１３と、第一通電制御部２１と、第二通電制御部２２と、第三通電制御部２３と、第五通電制御部２５と、第六通電制御部２６と、第七通電制御部２７と、第一電流検出器４１と、第二電流検出器４２とを備える。なお、図１と同一の部材については、同じ名称を付して詳細説明を省略する。   In the example of FIG. 1, two LED units are used, and the first LED unit 11 and the second LED unit 12 are connected in series to constitute the LED assembly 10. However, the present invention does not limit the number of LED portions to two, and for example, the number of LED portions can be three or more. As an example, FIG. 2 shows an example in which the LED assembly is configured by three of a first LED unit 11, a second LED unit 12, and a third LED unit 13 as a second embodiment. The LED driving device 200 shown in this figure includes a first half-wave rectifier circuit 51, a second half-wave rectifier circuit 52, a first LED unit 11, a second LED unit 12, a third LED unit 13, and a first LED. One energization control unit 21, a second energization control unit 22, a third energization control unit 23, a fifth energization control unit 25, a sixth energization control unit 26, a seventh energization control unit 27, and a first current A detector 41 and a second current detector 42 are provided. In addition, about the member same as FIG. 1, the same name is attached | subjected and detailed description is abbreviate | omitted.

第三ＬＥＤ部１３は、第一ＬＥＤ部１１、第二ＬＥＤ部１２と同様、少なくとも一のＬＥＤ素子を含む。また第三ＬＥＤ部１３は、第一ＬＥＤ部１１、第二ＬＥＤ部１２と直列に接続されており、ＬＥＤ集合体１０を構成する。さらに第一ＬＥＤ部１１から第二ＬＥＤ部１２、第三ＬＥＤ部１３に?がるラインが出力ラインＯＬとなる。   Similar to the first LED unit 11 and the second LED unit 12, the third LED unit 13 includes at least one LED element. Further, the third LED unit 13 is connected in series with the first LED unit 11 and the second LED unit 12 and constitutes the LED assembly 10. Furthermore, a line extending from the first LED unit 11 to the second LED unit 12 and the third LED unit 13 becomes an output line OL.

第一回路群１は、第一電流検出器４１、第一通電制御部２１、第二通電制御部２２に加えて、第三通電制御部２３を備える。また第一電流制御部３１は、これら第一通電制御部２１、第二通電制御部２２、第三通電制御部２３を制御する。第二通電制御部２２は第二バイパス経路ＢＰ２を形成し、第一整流電圧が印加される状態で、第一ＬＥＤ部１１及び第二ＬＥＤ部１２への通電量を制御する。   The first circuit group 1 includes a third energization control unit 23 in addition to the first current detector 41, the first energization control unit 21, and the second energization control unit 22. The first current control unit 31 controls the first energization control unit 21, the second energization control unit 22, and the third energization control unit 23. The second energization control unit 22 forms a second bypass path BP2 and controls the energization amount to the first LED unit 11 and the second LED unit 12 in a state where the first rectified voltage is applied.

第三通電制御部２３は、第三ＬＥＤ部１３からみて、この第三ＬＥＤ部１３と直列に接続されている。第三通電制御部２３は、第一整流電圧が印加される状態で、第一ＬＥＤ部１１、第二ＬＥＤ部１２及び第三ＬＥＤ部１３への通電量を制御するための部材であり、第三バイパス部あるいは第一電流制限部として機能する。また第一電流制御部３１は、第一整流電圧が印加される状態で、出力ラインＯＬを流れる電流値、すなわちここでは第一ＬＥＤ部１１を流れる電流値に基づいて、第一通電制御部２１、第二通電制御部２２及び第三通電制御部２３を制御する。第一ＬＥＤ部１１を流れる電流は、第一電流検出器４１で検出される。   The third energization control unit 23 is connected in series with the third LED unit 13 as viewed from the third LED unit 13. The third energization control unit 23 is a member for controlling the energization amount to the first LED unit 11, the second LED unit 12, and the third LED unit 13 in a state where the first rectified voltage is applied, Functions as three bypass parts or first current limiting part. In addition, the first current control unit 31 is based on the current value flowing through the output line OL, that is, the current value flowing through the first LED unit 11 in this case, in a state where the first rectified voltage is applied. The second energization control unit 22 and the third energization control unit 23 are controlled. The current flowing through the first LED unit 11 is detected by the first current detector 41.

第二回路群２は、第七通電制御部２７、第六通電制御部２６、第五通電制御部２５、及びこれらを制御する第二電流制御部３２、並びに第二電流検出器４２を備える。また第二電流制御部３２は、これら第七通電制御部２７、第六通電制御部２６、第五通電制御部２５を制御する。   The second circuit group 2 includes a seventh energization control unit 27, a sixth energization control unit 26, a fifth energization control unit 25, a second current control unit 32 that controls these, and a second current detector 42. The second current control unit 32 controls the seventh energization control unit 27, the sixth energization control unit 26, and the fifth energization control unit 25.

第七通電制御部２７は、第三ＬＥＤ部１３から見て、この第三ＬＥＤ部１３と直列に接続されている。また第七通電制御部２７は、第二ＬＥＤ部１２と並列に接続されている。この第七通電制御部２７は、第二整流電圧が印加される状態で第三ＬＥＤ部１３への通電量を制御するための部材であり、第七バイパス部として機能する。また第二電流制御部３２は、第二整流電圧が印加される状態で、出力ラインＯＬを流れる電流値、すなわちここでは第三ＬＥＤ部１３を流れる電流値に基づいて、第七通電制御部２７、第六通電制御部２６及び第五通電制御部２５を制御する。また第二電流制御部３２は、第二整流電圧が印加される状態で、出力ラインＯＬを流れる電流値、すなわちここでは第三ＬＥＤ部１３を流れる電流値と第二電流制御部３２に設定された基準電流値の比較に基づいて、第三ＬＥＤ部１３を流れる電流を、第二電流検出器４２で検出する。   The seventh energization control unit 27 is connected in series with the third LED unit 13 as viewed from the third LED unit 13. The seventh energization control unit 27 is connected in parallel with the second LED unit 12. The seventh energization control unit 27 is a member for controlling the energization amount to the third LED unit 13 in a state where the second rectified voltage is applied, and functions as a seventh bypass unit. The second current control unit 32 also applies the seventh energization control unit 27 based on the current value flowing through the output line OL, that is, the current value flowing through the third LED unit 13 in this case, in a state where the second rectified voltage is applied. The sixth energization control unit 26 and the fifth energization control unit 25 are controlled. The second current control unit 32 is set to the current value flowing through the output line OL, that is, the current value flowing through the third LED unit 13 and the second current control unit 32 in the state where the second rectified voltage is applied. Based on the comparison of the reference current values, the second current detector 42 detects the current flowing through the third LED unit 13.

これにより、直列接続された第一ＬＥＤ部１１〜第三ＬＥＤ部１３に対して、これらを点灯駆動する回路を、第一半波整流回路５１側と?がる第一回路群１と、第二半波整流回路５２側と?がる第二回路群２の２つを用意し、第一整流電圧と第二整流電圧の各半波整流区間で点灯する制御を異ならせることで、第一ＬＥＤ部１１〜第三ＬＥＤ部１３の点灯時間を均一化でき、発光むらを低減した高品質な発光を実現できる。   As a result, for the first LED unit 11 to the third LED unit 13 connected in series, a circuit for lighting and driving them is connected to the first circuit group 1 and the first half-wave rectifier circuit 51 side. By preparing two of the second circuit group 2 that is connected to the two half-wave rectifier circuit 52 side, and by controlling the lighting to be different in each half-wave rectification section of the first rectified voltage and the second rectified voltage, The lighting time of the LED unit 11 to the third LED unit 13 can be made uniform, and high-quality light emission with reduced unevenness in light emission can be realized.

なお、本実施形態は、実施形態１の下位概念であるが、発明の理解を容易にするために別の実施形態として説明した。
＜実施形態３＞ The present embodiment is a subordinate concept of the first embodiment, but has been described as another embodiment in order to facilitate understanding of the invention.
<Embodiment 3>

さらに実施形態３として、ＬＥＤ集合体として、第一ＬＥＤ部１１、第二ＬＥＤ部１２、第三ＬＥＤ部１３、第四ＬＥＤ部１４の４つを直列に接続して構成した発光ダイオード駆動装置３００を図３に示す。この図に示す発光ダイオード駆動装置３００は、第一半波整流回路５１、第二半波整流回路５２と、第一ＬＥＤ部１１、第二ＬＥＤ部１２、第三ＬＥＤ部１３、第四ＬＥＤ部１４と、第一通電制御部２１、第二通電制御部２２、第三通電制御部２３、第四通電制御部２４と、第五通電制御部２５、第六通電制御部２６、第七通電制御部２７、第八通電制御部２８と、第一電流検出器４１と、第二電流検出器４２とを備える。なお、図１や図２と同一の部材については、同じ名称を付して詳細説明を省略する。   Furthermore, as Embodiment 3, as the LED aggregate, a light emitting diode driving device 300 configured by connecting four of the first LED unit 11, the second LED unit 12, the third LED unit 13, and the fourth LED unit 14 in series. Is shown in FIG. The LED driving device 300 shown in this figure includes a first half-wave rectifier circuit 51, a second half-wave rectifier circuit 52, a first LED unit 11, a second LED unit 12, a third LED unit 13, and a fourth LED unit. 14, first energization control unit 21, second energization control unit 22, third energization control unit 23, fourth energization control unit 24, fifth energization control unit 25, sixth energization control unit 26, and seventh energization control. Unit 27, eighth energization control unit 28, first current detector 41, and second current detector 42. In addition, about the member same as FIG.1 and FIG.2, the same name is attached | subjected and detailed description is abbreviate | omitted.

第四ＬＥＤ部１４は、第一ＬＥＤ部１１〜第三ＬＥＤ部１３と同様、少なくとも一のＬＥＤ素子を含む。また第四ＬＥＤ部１４は、第一ＬＥＤ部１１〜第三ＬＥＤ部１３と直列に接続されており、ＬＥＤ集合体１０を構成する。第一ＬＥＤ部１１から第四ＬＥＤ部１４に?がるラインが出力ラインＯＬとなる。   The fourth LED unit 14 includes at least one LED element, similarly to the first LED unit 11 to the third LED unit 13. The fourth LED unit 14 is connected in series with the first LED unit 11 to the third LED unit 13 and constitutes the LED assembly 10. A line extending from the first LED unit 11 to the fourth LED unit 14 is an output line OL.

第一回路群１は、第一電流検出器４１、第一通電制御部２１、第二通電制御部２２、第三通電制御部２３に加えて、第四通電制御部２４を備える。また第一電流制御部３１は、これら第一通電制御部２１、第二通電制御部２２、第三通電制御部２３、第四通電制御部２４を制御する。第三通電制御部２３は第三バイパス経路ＢＰ３を形成し、第一整流電圧が印加される状態で、第一ＬＥＤ部１１、第二ＬＥＤ部１２及び第三ＬＥＤ部１３への通電量を制御する。   The first circuit group 1 includes a fourth energization control unit 24 in addition to the first current detector 41, the first energization control unit 21, the second energization control unit 22, and the third energization control unit 23. The first current control unit 31 controls the first energization control unit 21, the second energization control unit 22, the third energization control unit 23, and the fourth energization control unit 24. The third energization control unit 23 forms the third bypass path BP3 and controls the energization amount to the first LED unit 11, the second LED unit 12, and the third LED unit 13 in a state where the first rectified voltage is applied. To do.

第四通電制御部２４は、第四ＬＥＤ部１４からみて、この第四ＬＥＤ部１４と直列に接続されている。第四通電制御部２４は、第一整流電圧が印加される状態で、第一ＬＥＤ部１１、第二ＬＥＤ部１２、第三ＬＥＤ部１３及び第四ＬＥＤ部１４への通電量を制御するための部材であり、第四バイパス部あるいは第一電流制限部として機能する。また第一電流制御部３１は、第一整流電圧が印加される状態で、出力ラインＯＬを流れる電流値、すなわちここでは第一ＬＥＤ部１１を流れる電流値に基づいて、第一通電制御部２１、第二通電制御部２２、第三通電制御部２３及び第四通電制御部２４を制御する。第一ＬＥＤ部１１を流れる電流は、第一電流検出器４１で検出される。   The fourth energization control unit 24 is connected in series with the fourth LED unit 14 as viewed from the fourth LED unit 14. The fourth energization control unit 24 controls the energization amount to the first LED unit 11, the second LED unit 12, the third LED unit 13, and the fourth LED unit 14 in a state where the first rectified voltage is applied. And functions as a fourth bypass section or a first current limiting section. In addition, the first current control unit 31 is based on the current value flowing through the output line OL, that is, the current value flowing through the first LED unit 11 in this case, in a state where the first rectified voltage is applied. The second energization control unit 22, the third energization control unit 23, and the fourth energization control unit 24 are controlled. The current flowing through the first LED unit 11 is detected by the first current detector 41.

第二回路群２は、第八通電制御部２８、第七通電制御部２７、第六通電制御部２６、第五通電制御部２５、及びこれらを制御する第二電流制御部３２、並びに第二電流検出器４２を備える。また第二電流制御部３２は、これら第八通電制御部２８、第七通電制御部２７、第六通電制御部２６、第五通電制御部２５を制御する。   The second circuit group 2 includes an eighth energization control unit 28, a seventh energization control unit 27, a sixth energization control unit 26, a fifth energization control unit 25, a second current control unit 32 that controls these, and a second A current detector 42 is provided. The second current control unit 32 controls the eighth energization control unit 28, the seventh energization control unit 27, the sixth energization control unit 26, and the fifth energization control unit 25.

第八通電制御部２８は、第四ＬＥＤ部１４から見て、この第四ＬＥＤ部１４と直列に接続されている。また第八通電制御部２８は、第三ＬＥＤ部１３と並列に接続されている。この第八通電制御部２８は、第二整流電圧が印加される状態で第四ＬＥＤ部１４への通電量を制御するための部材であり、第八バイパス部として機能する。また第二電流制御部３２は、第二整流電圧が印加される状態で、出力ラインＯＬを流れる電流値、すなわちここでは第四ＬＥＤ部１４を流れる電流値に基づいて、第八通電制御部２８、第七通電制御部２７、第六通電制御部２６及び第五通電制御部２５を制御する。また第二電流制御部３２は、第二整流電圧が印加される状態で、出力ラインＯＬを流れる電流値、すなわちここでは第四ＬＥＤ部１４を流れる電流値と第二電流制御部３２に設定された基準電流値の比較に基づいて、第四ＬＥＤ部１４を流れる電流を、第二電流検出器４２で検出する。   The eighth energization control unit 28 is connected in series with the fourth LED unit 14 as viewed from the fourth LED unit 14. The eighth energization control unit 28 is connected in parallel with the third LED unit 13. The eighth energization control unit 28 is a member for controlling the energization amount to the fourth LED unit 14 in a state where the second rectified voltage is applied, and functions as an eighth bypass unit. The second current control unit 32 also applies the eighth energization control unit 28 based on the current value flowing through the output line OL, that is, the current value flowing through the fourth LED unit 14 in this case, in a state where the second rectified voltage is applied. The seventh energization control unit 27, the sixth energization control unit 26, and the fifth energization control unit 25 are controlled. The second current control unit 32 is set to the current value flowing through the output line OL, that is, the current value flowing through the fourth LED unit 14 and the second current control unit 32 in a state where the second rectified voltage is applied. Based on the comparison of the reference current values, the second current detector 42 detects the current flowing through the fourth LED unit 14.

これにより、直列接続された第一ＬＥＤ部１１〜第四ＬＥＤ部１４に対して、これらを点灯駆動する回路を、第一半波整流回路５１側と?がる第一回路群１と、第二半波整流回路５２側と?がる第二回路群２の２つを用意し、第一整流電圧と第二整流電圧の各半波整流区間で点灯する制御を異ならせることで、第一ＬＥＤ部１１〜第四ＬＥＤ部１４の点灯時間を均一化でき、発光むらを低減した高品質な発光を実現できる。すなわち、第一半波整流回路５１と第二半波整流回路５２は、それぞれ交流電源ＡＰを半波整流し、交流電源ＡＰの半周期交代でＬＥＤ集合体１０に電力を供給する。これにより、一方の第一半波整流回路５１が動作中の半周期は、第二半波整流回路５２は整流を行わず、次の半周期は第一半波整流回路５１が休止し、第二半波整流回路５２が動作する。このため、第一半波整流回路５１の動作中は、これにより第一整流電圧が供給され、ＬＥＤ集合体１０の左側に設けられた第一回路群１が動作し、ＬＥＤ集合体１０に電力供給を行い駆動する。そして次の半周期は、第二半波整流回路５２がＬＥＤ集合体１０の右側に設けられた第二回路群２に第二整流電圧を供給して動作させ、前半周期とは逆の点灯順で、ＬＥＤ集合体１０に電力供給を行う。このように動作することで、従来はトータルの給電力が最も小さかった第四ＬＥＤ部１４と、最も大きかった第一ＬＥＤ部１１への供給電力がほぼ等しくなる。同様に第二ＬＥＤ部１２と第三ＬＥＤ部１３へのトータルの供給電力が等しくなる。これによって各ＬＥＤ部の光度の均一化が図られる。   Thereby, for the first LED unit 11 to the fourth LED unit 14 connected in series, a circuit for lighting and driving them is connected to the first circuit group 1 and the first half-wave rectifier circuit 51 side. By preparing two of the second circuit group 2 that is connected to the two half-wave rectifier circuit 52 side, and by controlling the lighting to be different in each half-wave rectification section of the first rectified voltage and the second rectified voltage, The lighting time of the LED unit 11 to the fourth LED unit 14 can be made uniform, and high-quality light emission with reduced light emission unevenness can be realized. That is, the first half-wave rectifier circuit 51 and the second half-wave rectifier circuit 52 respectively rectify the AC power supply AP by half-wave, and supply power to the LED assembly 10 at half-cycle alternation of the AC power supply AP. Thereby, in the half cycle in which one of the first half-wave rectifier circuits 51 is operating, the second half-wave rectifier circuit 52 does not perform rectification, and in the next half cycle, the first half-wave rectifier circuit 51 is stopped, The half-wave rectifier circuit 52 operates. For this reason, during the operation of the first half-wave rectifier circuit 51, the first rectified voltage is thereby supplied, the first circuit group 1 provided on the left side of the LED assembly 10 operates, and the LED assembly 10 is powered. Supply and drive. Then, in the next half cycle, the second half-wave rectifier circuit 52 operates by supplying the second rectified voltage to the second circuit group 2 provided on the right side of the LED assembly 10, and the lighting order reverse to the first half cycle. Thus, power is supplied to the LED assembly 10. By operating in this way, conventionally, the power supplied to the fourth LED unit 14 that has the smallest total power supply and the first LED unit 11 that has the largest total power supply becomes substantially equal. Similarly, the total power supplied to the second LED unit 12 and the third LED unit 13 becomes equal. As a result, the luminous intensity of each LED unit is made uniform.

なお、本実施形態は、実施形態１、２の下位概念であるが、発明の理解を容易にするために別の実施形態として説明した。
＜実施形態４＞ The present embodiment is a subordinate concept of the first and second embodiments, but has been described as another embodiment in order to facilitate understanding of the invention.
<Embodiment 4>

発光ダイオード駆動装置はさらに、高調波抑制信号生成部や電流制御信号付与部を付加することもできる。一例として、図３の発光ダイオード駆動装置に高調波抑制信号生成部や電流制御信号付与部を付加した例を実施形態４として、図４に示す。この発光ダイオード駆動装置４００では、第一回路群１側に第一高調波抑制信号生成部６１、第一電流制御信号付与部７１を、第二回路群２側に第二高調波抑制信号生成部６２、第二電流制御信号付与部７２を、それぞれ備えている。第一高調波抑制信号生成部６１は、第一半波整流回路５１の出力側に接続され、所定の大きさの正弦波を生成して第一電流制御部３１に供給するための部材である。また第二高調波抑制信号生成部６２は、第二半波整流回路５２の出力側に接続され、所定の大きさの正弦波を生成して第二電流制御部３２に供給するための部材である。
（第一高調波抑制信号生成部６１） The light emitting diode driving device can further include a harmonic suppression signal generating unit and a current control signal applying unit. As an example, FIG. 4 shows an embodiment 4 in which a harmonic suppression signal generation unit and a current control signal applying unit are added to the light emitting diode driving device of FIG. In the light emitting diode driving device 400, the first harmonic suppression signal generation unit 61 and the first current control signal applying unit 71 are provided on the first circuit group 1 side, and the second harmonic suppression signal generation unit is provided on the second circuit group 2 side. 62 and a second current control signal applying unit 72 are provided. The first harmonic suppression signal generator 61 is a member that is connected to the output side of the first half-wave rectifier circuit 51, generates a sine wave of a predetermined magnitude, and supplies it to the first current controller 31. . The second harmonic suppression signal generator 62 is connected to the output side of the second half-wave rectifier circuit 52, and is a member for generating a sine wave of a predetermined magnitude and supplying it to the second current controller 32. is there.
(First harmonic suppression signal generator 61)

第一高調波抑制信号生成部６１は、第一電流制御部３１と接続される。第一高調波抑制信号生成部６１は、第一半波整流回路５１から出力される第一整流電圧に基づいて、第一高調波抑制信号電圧を生成する。ここでは、第一整流電圧が印加される状態で、第一高調波抑制信号生成部６１は、第一半波整流回路５１で整流された第一整流電圧を適当な大きさに圧縮し、第一電流制御部３１に送出する。第一電流制御部３１は、第一高調波抑制信号生成部６１から送られた信号を参照信号とし、第一電流検出器４１で検出された第一電流検出信号と比較する。第一電流制御部３１は、この比較結果を基に、それぞれの第一通電制御部２１〜第四通電制御部２４を介して適切なタイミングと電流で、それぞれのＬＥＤ部を駆動する。   The first harmonic suppression signal generation unit 61 is connected to the first current control unit 31. The first harmonic suppression signal generator 61 generates a first harmonic suppression signal voltage based on the first rectified voltage output from the first half-wave rectifier circuit 51. Here, in a state where the first rectified voltage is applied, the first harmonic suppression signal generation unit 61 compresses the first rectified voltage rectified by the first half-wave rectifier circuit 51 to an appropriate magnitude, One current is sent to the current control unit 31. The first current control unit 31 uses the signal sent from the first harmonic suppression signal generation unit 61 as a reference signal and compares it with the first current detection signal detected by the first current detector 41. The first current control unit 31 drives each LED unit at an appropriate timing and current via the first energization control unit 21 to the fourth energization control unit 24 based on the comparison result.

同様に第二高調波抑制信号生成部６２は、第二電流制御部３２と接続される。第二高調波抑制信号生成部６２は、第二半波整流回路５２から出力される第二整流電圧に基づいて、第二高調波抑制信号電圧を生成する。ここでは、第二整流電圧が印加される状態で、第二高調波抑制信号生成部６２は、第二半波整流回路５２で整流された第二整流電圧を適当な大きさに圧縮し、第二電流制御部３２に送出する。第二電流制御部３２は、第二高調波抑制信号生成部６２から送られた信号を参照信号とし、第二電流検出器４２で検出された第二電流検出信号と比較する。第二電流制御部３２は、この比較結果を基に、それぞれの第五通電制御部２５〜第八通電制御部２８を介して適切なタイミングと電流で、それぞれのＬＥＤ部を駆動する。
（第一電流制御信号付与部７１） Similarly, the second harmonic suppression signal generation unit 62 is connected to the second current control unit 32. The second harmonic suppression signal generator 62 generates a second harmonic suppression signal voltage based on the second rectified voltage output from the second half-wave rectifier circuit 52. Here, in a state where the second rectified voltage is applied, the second harmonic suppression signal generation unit 62 compresses the second rectified voltage rectified by the second half-wave rectifier circuit 52 to an appropriate magnitude, This is sent to the dual current control unit 32. The second current control unit 32 uses the signal sent from the second harmonic suppression signal generation unit 62 as a reference signal and compares it with the second current detection signal detected by the second current detector 42. Based on the comparison result, the second current control unit 32 drives each LED unit at an appropriate timing and current via each of the fifth energization control unit 25 to the eighth energization control unit 28.
(First current control signal applying unit 71)

さらに第一電流制御部３１と第一通電制御部２１〜第四通電制御部２４との間には、第一電流制御信号付与部７１が介在されている。例えば第一通電制御部２１に付与する動作制御信号と第四通電制御部２４に付与する動作制御信号間には電位差が生じるので、第一電流制御信号付与部７１を設けることで第一通電制御部２１と第四通電制御部２４の動作の切り替えを確実に行うことが可能となる。同様に第二電流制御部３２と第五通電制御部２５〜第八通電制御部２８との間には、第二電流制御信号付与部７２が介されている。
＜実施形態５＞ Further, a first current control signal applying unit 71 is interposed between the first current control unit 31 and the first energization control unit 21 to the fourth energization control unit 24. For example, since a potential difference occurs between the operation control signal applied to the first energization control unit 21 and the operation control signal applied to the fourth energization control unit 24, the first energization control is provided by providing the first current control signal applying unit 71. It becomes possible to reliably switch the operation of the unit 21 and the fourth energization control unit 24. Similarly, a second current control signal applying unit 72 is interposed between the second current control unit 32 and the fifth energization control unit 25 to the eighth energization control unit 28.
<Embodiment 5>

発光ダイオード駆動装置はさらに、平滑化回路を付加することもできる。一例として、図３の発光ダイオード駆動装置に平滑化回路を付加した例を実施形態５として、図５に示す。この図に示す発光ダイオード駆動装置５００は、ＬＥＤ集合体１０と並列に接続された平滑化回路を備えている。平滑化回路は、ＬＥＤ集合体１０の消灯期間を低減するための部材である。この平滑化回路は、例えば平滑コンデンサ８０で構成される。
（平滑コンデンサ８０への充電） The light emitting diode driving device may further include a smoothing circuit. As an example, FIG. 5 shows a fifth embodiment in which a smoothing circuit is added to the light-emitting diode driving device of FIG. The light emitting diode driving device 500 shown in this figure includes a smoothing circuit connected in parallel with the LED assembly 10. The smoothing circuit is a member for reducing the turn-off period of the LED assembly 10. This smoothing circuit is constituted by a smoothing capacitor 80, for example.
(Charging the smoothing capacitor 80)

平滑コンデンサ８０の端子間電圧は、定常動作状態においては第一ＬＥＤ部１１〜第四ＬＥＤ部１４の全ＬＥＤの順方向電圧の和Ｖｆallに等しくなる。従って、入力電圧が第一ＬＥＤ部１１〜第四ＬＥＤ部１４が駆動される電圧に達すると充電が開始され、入力電圧が第一ＬＥＤ部１１〜第四ＬＥＤ部１４を、電流制御部３０より指示される電流値で駆動できない電圧まで下降（第一ＬＥＤ部１１〜第三ＬＥＤ部１３を駆動する状態に移行）すると充電を終了する。充電期間中、充電によりコンデンサ端子電圧が上昇するとＶｆallも上昇するため、ＬＥＤ駆動電流が増加し、平滑コンデンサ８０への充電電流は徐々に減少する。このコンデンサ充電電流とＬＥＤ駆動電流が合成されて、電流制御部３０で正弦波電流に制御される。これにより、元来正弦波に近似した電流波形で制御されている発光ダイオード駆動装置全体の電流に影響することなく、平滑コンデンサ８０の充電が行える。
（平滑コンデンサ８０からの放電） The voltage between the terminals of the smoothing capacitor 80 becomes equal to the sum Vf all of forward voltages of all LEDs of the first LED unit 11 to the fourth LED unit 14 in a steady operation state. Therefore, when the input voltage reaches the voltage at which the first LED unit 11 to the fourth LED unit 14 are driven, charging is started, and the input voltage is changed from the first LED unit 11 to the fourth LED unit 14 by the current control unit 30. When the voltage drops to a voltage that cannot be driven with the instructed current value (transition to a state in which the first LED unit 11 to the third LED unit 13 are driven), the charging is finished. During the charging period, since the capacitor terminal voltage increases Vf all also rises by charging, LED drive current is increased, the charging current to the smoothing capacitor 80 gradually decreases. The capacitor charging current and the LED driving current are combined and controlled by the current control unit 30 to a sine wave current. As a result, the smoothing capacitor 80 can be charged without affecting the current of the entire light emitting diode driving device that is controlled by a current waveform that approximates a sine wave.
(Discharge from the smoothing capacitor 80)

一方で平滑コンデンサ８０は、ここに溜まった電荷を、接続された第一ＬＥＤ部１１〜第四ＬＥＤ部１４に放電する。なお平滑コンデンサ８０の充電電圧は、ＬＥＤ集合体１０を構成する直列接続された第一ＬＥＤ部１１〜第四ＬＥＤ部１４の順方向電圧の和Ｖｆ1-4となるので、コンデンサ充電時にＬＥＤ集合体１０に流れる電流以上の電流で平滑コンデンサ８０が放電されることはない。 On the other hand, the smoothing capacitor 80 discharges the charges accumulated here to the connected first LED unit 11 to fourth LED unit 14. Since the charging voltage of the smoothing capacitor 80 is the sum Vf 1-4 of the forward voltages of the first LED unit 11 to the fourth LED unit 14 connected in series constituting the LED assembly 10, the LED assembly is charged when the capacitor is charged. The smoothing capacitor 80 is not discharged by a current greater than the current flowing through the body 10.

なお上述した各実施形態で付加した要素は、他の実施形態、例えば実施形態１や２においても同様に適用できることはいうまでもない。
＜実施例１＞ In addition, it cannot be overemphasized that the element added in each embodiment mentioned above is applicable similarly in other embodiment, for example, Embodiment 1 and 2. FIG.
<Example 1>

次に、図４の発光ダイオード駆動装置４００を半導体素子を用いて実現した具体的な回路の構成例を、実施例１として図６に示す。この発光ダイオード駆動装置６００は、交流電源ＡＰに接続された第一半波整流回路５１、及び第二半波整流回路５２としてダイオードを用いている。第一半波整流回路５１と第二半波整流回路５２とでは、ダイオードの整流方向を互いに逆向きとしている。   Next, a specific circuit configuration example in which the light-emitting diode driving device 400 of FIG. 4 is realized by using a semiconductor element is shown in FIG. The light emitting diode driving device 600 uses diodes as the first half-wave rectifier circuit 51 and the second half-wave rectifier circuit 52 connected to the AC power supply AP. In the first half-wave rectifier circuit 51 and the second half-wave rectifier circuit 52, the rectification directions of the diodes are opposite to each other.

交流電源ＡＰには、保護部材８１が直列に接続される。保護部材は、過電流阻止のためのヒューズが好適に利用できる。また交流電源ＡＰには、サージ防護回路を設けてもよい。さらに交流電源ＡＰと並列に、バイパスコンデンサ８２が接続される。
（交流電源ＡＰ） A protective member 81 is connected in series to the AC power supply AP. As the protective member, a fuse for preventing overcurrent can be suitably used. The AC power supply AP may be provided with a surge protection circuit. Further, a bypass capacitor 82 is connected in parallel with the AC power supply AP.
(AC power supply AP)

交流電源ＡＰは、１００Ｖや２００Ｖの商用電源が好適に利用できる。この商用電源の１００Ｖ又は２００Ｖは実効値であり、全波整流された整流波形の最大電圧は約１４１Ｖ又は２８２Ｖとなる。
（ＬＥＤ集合体１０） As the AC power supply AP, a commercial power supply of 100V or 200V can be suitably used. 100V or 200V of this commercial power supply is an effective value, and the maximum voltage of the rectified waveform obtained by full-wave rectification is about 141V or 282V.
(LED assembly 10)

ＬＥＤ集合体１０を構成する各ＬＥＤ部は、相互に直列に接続すると共に、複数のブロックに分け、ブロック同士の境界からは端子を引き出して、第一通電制御部２１、第二通電制御部２２、第三通電制御部２３、第四通電制御部２４と接続している。図６の例では、第一ＬＥＤ部１１、第二ＬＥＤ部１２、第三ＬＥＤ部１３、第四ＬＥＤ部１４の４つのグループでＬＥＤ集合体１０を構成している。   The LED units constituting the LED assembly 10 are connected in series with each other, divided into a plurality of blocks, and a terminal is drawn out from the boundary between the blocks, and the first energization control unit 21 and the second energization control unit 22. The third energization control unit 23 and the fourth energization control unit 24 are connected. In the example of FIG. 6, the LED assembly 10 is configured by four groups of the first LED unit 11, the second LED unit 12, the third LED unit 13, and the fourth LED unit 14.

図６に示す各ＬＥＤ部１１〜１４は、一のＬＥＤシンボルが複数のＬＥＤチップを実装したＬＥＤパッケージを表している。この例では、各ＬＥＤパッケージは、１０個のＬＥＤチップを実装している。各ＬＥＤ部の発光ダイオード接続数、あるいはＬＥＤ部の接続数は、順方向電圧の加算値、すなわち直列接続されたＬＥＤ素子の総数と、使用する電源電圧とで決定される。例えば商用電源を使用する場合は、各ＬＥＤ部のＶｆの合計である合計順方向電圧Ｖｆallが、１４１Ｖ程度、又はそれ以下となるように設定される。 Each LED part 11-14 shown in FIG. 6 represents the LED package in which one LED symbol mounted the some LED chip. In this example, each LED package has 10 LED chips mounted thereon. The number of light emitting diodes connected to each LED unit or the number of LED units connected is determined by the added value of forward voltages, that is, the total number of LED elements connected in series and the power supply voltage to be used. For example, when commercial power is used, the total forward voltage Vf all is the sum of the Vf of each LED unit is about 141V, or is set as follows becomes.

また図６の例では、４つのＬＥＤ部のＶｆを同一となるように設計している。ただこの例に限られず、上述の通りＬＥＤ部数を３以下、あるいは５以上としてもよい。ＬＥＤ部数を増やすことで、電流制御の数を増やしてより細かなＬＥＤ部間の点灯切り替え制御が可能となる。さらに各ＬＥＤ部のＶｆは同一としなくとも良い。
（第一通電制御部２１〜第四通電制御部２４） In the example of FIG. 6, the four LED portions are designed to have the same Vf. However, the present invention is not limited to this example, and as described above, the number of LED units may be 3 or less, or 5 or more. By increasing the number of LED units, it is possible to increase the number of current controls and perform more detailed lighting switching control between the LED units. Furthermore, the Vf of each LED part does not need to be the same.
(First Energization Control Unit 21 to Fourth Energization Control Unit 24)

第一通電制御部２１、第二通電制御部２２、第三通電制御部２３、第四通電制御部２４は、各ＬＥＤ部に対応して、電流駆動するための部材である。このような第一通電制御部２１〜第四通電制御部２４としては、トランジスタ等の半導体素子で構成される。特にＦＥＴは、ゲートが電圧駆動のため効率の面で好ましい。ただ、第一通電制御部２１〜第四通電制御部２４はＦＥＴに限定されるものでなく、バイポーラトランジスタ等でも構成できることはいうまでもない。   The 1st electricity supply control part 21, the 2nd electricity supply control part 22, the 3rd electricity supply control part 23, and the 4th electricity supply control part 24 are members for carrying out an electric current corresponding to each LED part. Such first energization control unit 21 to fourth energization control unit 24 are configured by semiconductor elements such as transistors. In particular, the FET is preferable in terms of efficiency because the gate is driven by voltage. However, it goes without saying that the first energization control unit 21 to the fourth energization control unit 24 are not limited to FETs, and can be configured by bipolar transistors or the like.

図６の例では、第一通電制御部２１〜第四通電制御部２４として、ＬＥＤ電流制御トランジスタを利用している。具体的には、第一ＬＥＤ部１１、第二ＬＥＤ部１２、第三ＬＥＤ部１３、第四ＬＥＤ部１４には、それぞれ下流側に第一通電制御部２１〜第四通電制御部２４である第一通電制御トランジスタ２１Ｂ、第二通電制御トランジスタ２２Ｂ、第三通電制御トランジスタ２３Ｂ、第四通電制御トランジスタ２４Ｂが接続される。各通電制御トランジスタは、その前段のＬＥＤ部の電流量に応じて、ＯＮ状態や電流制御が切り替わる。通電制御トランジスタがＯＦＦになると、バイパス経路に電流が流れなくなって、ＬＥＤ部に通電される。すなわち、各第一通電制御部２１〜第四通電制御部２４によってバイパスされる電流量を調整できるので、結果的に各ＬＥＤ部の通電量を制御できることになる。図６の例では、第二ＬＥＤ部１２と並列に第一通電制御部２１が接続され、第一バイパス経路ＢＰ１を形成する。また第三ＬＥＤ部１３と並列に第二通電制御部２２が接続され、第二バイパス経路ＢＰ２を形成する。さらに第四ＬＥＤ部１４と並列に第三通電制御部２３が接続され、第三バイパス経路ＢＰ３を形成する。さらにまた第四通電制御トランジスタ２４Ｂが第四ＬＥＤ部１４と直列に接続され、第四バイパス経路ＢＰ４を形成し、第一ＬＥＤ部１１、第二ＬＥＤ部１２、第三ＬＥＤ部１３及び第四ＬＥＤ部１４への通電量を制御する。   In the example of FIG. 6, LED current control transistors are used as the first energization control unit 21 to the fourth energization control unit 24. Specifically, the first LED unit 11, the second LED unit 12, the third LED unit 13, and the fourth LED unit 14 are respectively a first energization control unit 21 to a fourth energization control unit 24 on the downstream side. The first energization control transistor 21B, the second energization control transistor 22B, the third energization control transistor 23B, and the fourth energization control transistor 24B are connected. Each energization control transistor is switched between ON state and current control according to the amount of current in the LED section in the preceding stage. When the energization control transistor is turned off, no current flows through the bypass path, and the LED unit is energized. That is, since the amount of current bypassed by each of the first energization control unit 21 to the fourth energization control unit 24 can be adjusted, the energization amount of each LED unit can be controlled as a result. In the example of FIG. 6, the first energization control unit 21 is connected in parallel with the second LED unit 12 to form the first bypass path BP1. A second energization control unit 22 is connected in parallel with the third LED unit 13 to form a second bypass path BP2. Further, a third energization control unit 23 is connected in parallel with the fourth LED unit 14 to form a third bypass path BP3. Furthermore, the fourth energization control transistor 24B is connected in series with the fourth LED unit 14 to form a fourth bypass path BP4, and the first LED unit 11, the second LED unit 12, the third LED unit 13, and the fourth LED. The amount of energization to the unit 14 is controlled.

なお第一ＬＥＤ部１１は、並列に接続されたバイパス経路や通電制御部を設けていない。第二ＬＥＤ部１２と並列に接続された第一通電制御部２１が、第一ＬＥＤ部１１の電流量を制御するからである。また第四ＬＥＤ部１４については、第四通電制御トランジスタ２４Ｂが電流制御を行う。
（第一電流制御部３１） In addition, the 1st LED part 11 does not provide the bypass path | route and electricity supply control part which were connected in parallel. This is because the first energization control unit 21 connected in parallel with the second LED unit 12 controls the current amount of the first LED unit 11. For the fourth LED unit 14, the fourth energization control transistor 24B performs current control.
(First current control unit 31)

第一電流制御部３１は、各ＬＥＤ部と対応する第一通電制御部２１〜第四通電制御部２４が、適切なタイミングで電流駆動を行うよう制御する部材である。この第一電流制御部３１は、第一半波整流回路５１で整流された第一整流電圧を基準電圧として、通電制御部の動作を制御する動作制御信号を出力する。これにより、第一電流検出器４１で検出する出力ラインＯＬ上の電流量を、整流電圧と比例した値に制御できる。この結果、回路全体の入力電流は交流入力電圧に比例した波形となり、高調波の抑制が可能となる。   The first current control unit 31 is a member that controls the first energization control unit 21 to the fourth energization control unit 24 corresponding to each LED unit to perform current drive at an appropriate timing. The first current control unit 31 outputs an operation control signal for controlling the operation of the energization control unit using the first rectified voltage rectified by the first half-wave rectifier circuit 51 as a reference voltage. Thereby, the amount of current on the output line OL detected by the first current detector 41 can be controlled to a value proportional to the rectified voltage. As a result, the input current of the entire circuit becomes a waveform proportional to the AC input voltage, and harmonics can be suppressed.

図６の第一電流制御部３１にも、トランジスタ等のスイッチング素子が利用できる。特にバイポーラトランジスタは、電流量の検出に好適に利用できる。ただこの例では第一電流制御部３１を、オペアンプ３１Ｂで構成している。なお第一電流制御部は、オペアンプに限定されるものでなく、コンパレータ、バイポーラトランジスタ、ＭＯＳＦＥＴ等でも構成可能であるのはいうまでもない。   A switching element such as a transistor can also be used for the first current control unit 31 of FIG. In particular, the bipolar transistor can be suitably used for detecting the amount of current. However, in this example, the first current control unit 31 is composed of an operational amplifier 31B. Needless to say, the first current control unit is not limited to the operational amplifier, and can be configured by a comparator, a bipolar transistor, a MOSFET, or the like.

図６の例では、第一電流制御部３１は、各通電制御トランジスタ２１Ｂ〜２４Ｂの動作を制御する。すなわち、各電流検出オペアンプが通電量の制御を行うことで、通電制御トランジスタをＯＦＦ／電流制御／ＯＮにそれぞれ切り替える。
（第一電流検出器４１） In the example of FIG. 6, the first current control unit 31 controls the operations of the energization control transistors 21 </ b> B to 24 </ b> B. That is, each current detection operational amplifier controls the energization amount to switch the energization control transistor to OFF / current control / ON.
(First current detector 41)

第一電流検出器４１は、ＬＥＤ部を直列接続したＬＥＤ集合体１０に通電される電流を電圧降下等により検出するための部材である。第一電流検出器４１で電流検出を行うことで、ＬＥＤ集合体１０を構成する各ＬＥＤ部の電流駆動を行う。またこの第一電流検出器４１は、ＬＥＤの保護抵抗としても機能する。さらに第一電流検出器４１で検出された電流検出信号に基づいて電流駆動を行うため、第一電流検出器４１は、電流回路の制御を行う第一電流制御部３１であるオペアンプ３１Ｂと接続されている。この回路例では、第一通電制御部２１、第二通電制御部２２、第三通電制御部２３、第四通電制御部２４と第一電流制御部３１で、一種の定電流回路が構成される。
（第一電流制御信号付与部７１） The first current detector 41 is a member for detecting a current supplied to the LED assembly 10 in which the LED units are connected in series by a voltage drop or the like. By performing current detection with the first current detector 41, current driving of each LED unit constituting the LED assembly 10 is performed. The first current detector 41 also functions as a protective resistor for the LED. Further, in order to drive the current based on the current detection signal detected by the first current detector 41, the first current detector 41 is connected to an operational amplifier 31B which is a first current control unit 31 that controls the current circuit. ing. In this circuit example, the first energization control unit 21, the second energization control unit 22, the third energization control unit 23, the fourth energization control unit 24, and the first current control unit 31 constitute a kind of constant current circuit. .
(First current control signal applying unit 71)

さらに第一電流制御部３１と各通電制御部との間には、第一電流制御信号付与部７１が介在されている。例えば第一通電制御部２１に付与する動作制御信号と第四通電制御部２４に付与する動作制御信号間には電位差が生じるので、第一電流制御信号付与部７１を設けることで第一通電制御部２１と第四通電制御部２４の動作の切り替えを確実に行うことが可能となる。各第一電流制御信号付与部７１は、各通電制御トランジスタのＯＮ／ＯＦＦをどの電流のタイミングで行うかを規定する。ここでは、入力電圧の上昇に伴い、第一〜第四通電制御トランジスタ２１Ｂ〜２４Ｂの順でＯＦＦされるよう、各第一電流制御信号付与部７１として電流制御信号付与ツェナーダイオード７１ａ、７１ｂ、７１ｃが設定、配置されている。なお図６の例では、第一電流制御信号付与部７１をツェナーダイオードで構成しているが、抵抗器、ダイオード等とすることもできる。   Further, a first current control signal applying unit 71 is interposed between the first current control unit 31 and each energization control unit. For example, since a potential difference occurs between the operation control signal applied to the first energization control unit 21 and the operation control signal applied to the fourth energization control unit 24, the first energization control is provided by providing the first current control signal applying unit 71. It becomes possible to reliably switch the operation of the unit 21 and the fourth energization control unit 24. Each first current control signal applying unit 71 defines at which current timing each energization control transistor is turned on / off. Here, as the input voltage increases, the current control signal applying Zener diodes 71a, 71b, and 71c are used as the first current control signal applying units 71 so that the first to fourth energization control transistors 21B to 24B are turned off in this order. Is set and arranged. In the example of FIG. 6, the first current control signal applying unit 71 is configured by a Zener diode, but may be a resistor, a diode, or the like.

図６の回路例では、第一半波整流回路５１で整流された入力電圧の上昇に伴い、第一ＬＥＤ部１１から第二ＬＥＤ部１２、第三ＬＥＤ部１３、第四ＬＥＤ部１４への順で、通電量の制御を行うことができる。また入力電圧の下降時には、逆の順序でＬＥＤが消灯される。
（第一高調波抑制信号生成抵抗６１ａ、６１ｂ） In the circuit example of FIG. 6, as the input voltage rectified by the first half-wave rectifier circuit 51 increases, the first LED unit 11 to the second LED unit 12, the third LED unit 13, and the fourth LED unit 14. In sequence, the energization amount can be controlled. When the input voltage decreases, the LEDs are turned off in the reverse order.
(First harmonic suppression signal generating resistors 61a and 61b)

一方図６の回路例では、第一電流制御部３１をオペアンプ３１Ｂで構成しており、このオペアンプ３１Ｂは、第一高調波抑制信号生成部６１により制御される。第一高調波抑制信号生成部６１は、第一高調波抑制信号生成抵抗６１ａ、６１ｂで構成される。第一高調波抑制信号生成抵抗６１ａ、６１ｂは、第一半波整流回路５１で整流された整流電圧を分圧する。いいかえると、整流電圧を適当な大きさに圧縮する。第一電流制御部であるオペアンプ３１Ｂの＋側入力端子には、第一高調波抑制信号生成抵抗６１ａ、６１ｂから出力される、圧縮された正弦波である高調波抑制信号が入力される。
（定電圧電源３１Ｂ０） On the other hand, in the circuit example of FIG. 6, the first current control unit 31 is configured by an operational amplifier 31 </ b> B, and the operational amplifier 31 </ b> B is controlled by the first harmonic suppression signal generation unit 61. The first harmonic suppression signal generation unit 61 includes first harmonic suppression signal generation resistors 61a and 61b. The first harmonic suppression signal generation resistors 61 a and 61 b divide the rectified voltage rectified by the first half-wave rectifier circuit 51. In other words, the rectified voltage is compressed to an appropriate level. A harmonic suppression signal that is a compressed sine wave and is output from the first harmonic suppression signal generation resistors 61a and 61b is input to the + side input terminal of the operational amplifier 31B that is the first current control unit.
(Constant voltage power supply 31B0)

オペアンプ３１Ｂは、定電圧電源３１Ｂ０により駆動される。定電圧電源３１Ｂ０は、オペアンプ電源用トランジスタ３１Ｂ１、ツェナーダイオード３１Ｂ２、ツェナー電圧設定抵抗３１Ｂ３で構成される。この定電圧電源３１Ｂ０は、交流電源ＡＰを第一半波整流回路５１で整流した後の整流電圧が、ツェナーダイオード３１Ｂ２のツェナー電圧を超えている期間だけ、オペアンプ３１Ｂに電源を供給する。この期間は、ＬＥＤ集合体１０の点灯期間を包含するよう設定される。すなわち、ＬＥＤ集合体１０の点灯中にオペアンプ３１Ｂを動作させて、点灯を制御する。   The operational amplifier 31B is driven by a constant voltage power supply 31B0. The constant voltage power supply 31B0 includes an operational amplifier power supply transistor 31B1, a Zener diode 31B2, and a Zener voltage setting resistor 31B3. The constant voltage power supply 31B0 supplies power to the operational amplifier 31B only during a period in which the rectified voltage after the AC power supply AP is rectified by the first half-wave rectifier circuit 51 exceeds the Zener voltage of the Zener diode 31B2. This period is set to include the lighting period of the LED assembly 10. In other words, the operational amplifier 31B is operated during the lighting of the LED assembly 10 to control the lighting.

一方、オペアンプ３１Ｂの−側入力端子には、第一電流検出抵抗４１で検出された電流検出信号である電圧が入力される。第一電流検出抵抗４１の電圧は、オペアンプ３１Ｂの＋側入力端子に印加される正弦波に沿って電流制御されるよう制御される。このように、正弦波に沿って電流制御動作を行うため、ＬＥＤ駆動電流が正弦波に近似された波形となる。   On the other hand, a voltage that is a current detection signal detected by the first current detection resistor 41 is input to the negative input terminal of the operational amplifier 31B. The voltage of the first current detection resistor 41 is controlled so that the current is controlled along a sine wave applied to the + side input terminal of the operational amplifier 31B. Thus, since the current control operation is performed along the sine wave, the LED drive current has a waveform approximated to a sine wave.

以上、第一回路群１の動作について説明したが、同様のことは第二回路群２においても当て嵌まる。すなわち第二整流電圧が印加される第二半波整流区間において、第五通電制御部２５〜第八通電制御部２８を構成する第五通電制御トランジスタ２５Ｂ〜第八通電制御トランジスタ２８Ｂにより、第四ＬＥＤ部１４、第三ＬＥＤ部１３、第二ＬＥＤ部１２、第一ＬＥＤ部１１をこの順に点灯制御する。また第五通電制御トランジスタ２５Ｂ〜第八通電制御トランジスタ２８Ｂは、第二電流制御部を構成するオペアンプ３２Ｂにより、第二電流検出抵抗４２Ｂを構成する第二電流検出器４２で検出された出力ラインＯＬの通電量、ここでは第四ＬＥＤ部１４の電流量に基づいて、第二電流制御信号付与部７２を構成する電流制御信号付与ツェナーダイオード７２ａ、７２ｂ、７２ｃを介して駆動される。またオペアンプ３２Ｂの−側入力端子には、第二電流検出抵抗４２で検出された電流検出信号である電圧が入力される。第二電流検出抵抗４２の電圧は、オペアンプ３２Ｂの−側入力端子に印加される正弦波に沿って電流制御されるよう制御される。このためオペアンプ３２Ｂの−側入力端子には、第二高調波抑制信号生成部６２を構成する第二高調波抑制信号生成抵抗６２ａ、６２が接続され、半波整流された第二整流電圧が分圧されて入力される。さらにオペアンプ３２Ｂの電源を構成する定電圧電源３２Ｂ０は、オペアンプ電源用トランジスタ３２Ｂ１、ツェナーダイオード３２Ｂ２、ツェナー電圧設定抵抗３２Ｂ３で構成される点も、第一回路群１と同様である。   The operation of the first circuit group 1 has been described above, but the same applies to the second circuit group 2. That is, in the second half-wave rectification period to which the second rectified voltage is applied, the fifth energization control transistor 25B to the eighth energization control transistor 28B constituting the fifth energization control unit 25 to the eighth energization control unit 28 provide the fourth The LED unit 14, the third LED unit 13, the second LED unit 12, and the first LED unit 11 are controlled to be lit in this order. Further, the fifth energization control transistor 25B to the eighth energization control transistor 28B are output lines OL detected by the second current detector 42 constituting the second current detection resistor 42B by the operational amplifier 32B constituting the second current control unit. Is driven through current control signal applying Zener diodes 72a, 72b, 72c constituting the second current control signal applying unit 72, based on the amount of current supplied, here the amount of current of the fourth LED unit 14. A voltage that is a current detection signal detected by the second current detection resistor 42 is input to the negative input terminal of the operational amplifier 32B. The voltage of the second current detection resistor 42 is controlled so that the current is controlled along a sine wave applied to the negative input terminal of the operational amplifier 32B. For this reason, the second harmonic suppression signal generation resistors 62a and 62 constituting the second harmonic suppression signal generation unit 62 are connected to the negative side input terminal of the operational amplifier 32B, and the second rectified voltage rectified by half-wave is divided. Pressed and input. Further, the constant voltage power source 32B0 that constitutes the power source of the operational amplifier 32B is the same as the first circuit group 1 in that it is composed of an operational amplifier power source transistor 32B1, a Zener diode 32B2, and a Zener voltage setting resistor 32B3.

なおＬＥＤ部はそれぞれ、複数の発光ダイオード素子を相互に直列に接続して構成できる。これにより、整流電圧を複数の発光ダイオード素子で効果的に分圧できる上、発光ダイオード素子毎の順方向電圧Ｖｆや温度特性のばらつきをある程度吸収して、ブロック単位での制御を均一化できる。ただ、ＬＥＤ部の数や各ＬＥＤ部を構成する発光ダイオード素子数等は、要求される明るさや入力電圧等によって任意に設定でき、例えばＬＥＤ部を一の発光ダイオード素子で構成したり、ＬＥＤ部の数を多くしてより細かな制御を行うこと、あるいは逆にＬＥＤ部を２つのみとして制御をシンプルにすることも可能であることは言うまでもない。   Each LED section can be configured by connecting a plurality of light emitting diode elements in series with each other. As a result, the rectified voltage can be effectively divided by a plurality of light emitting diode elements, and variations in forward voltage Vf and temperature characteristics for each light emitting diode element can be absorbed to some extent, and control in units of blocks can be made uniform. However, the number of LED units and the number of light emitting diode elements constituting each LED unit can be arbitrarily set according to required brightness, input voltage, etc., for example, the LED unit can be configured with one light emitting diode element, It goes without saying that finer control can be performed by increasing the number of LEDs, or conversely, the control can be simplified by using only two LED units.

また、上記構成ではＬＥＤ部の構成数を４としたが、ＬＥＤ部の数を２又は３としたり、又は５以上とすることもできることはいうまでもない。特に、ＬＥＤ部の数を増やすことで、正弦波状の電流波形をより低い電源電圧から形成することが可能となり、一層の高調波成分の抑制が可能となる。また図６の例では、各ＬＥＤ部がＯＮ／ＯＦＦされる切り替え動作を、入力電流に対してほぼ均等に分割しているが、均等にする必要は必ずしも無く、異なる電流でＬＥＤ部を切り替えてもよい。   In the above configuration, the number of LED units is four, but it goes without saying that the number of LED units can be two or three, or five or more. In particular, by increasing the number of LED portions, a sinusoidal current waveform can be formed from a lower power supply voltage, and harmonic components can be further suppressed. In the example of FIG. 6, the switching operation in which each LED unit is turned ON / OFF is divided almost evenly with respect to the input current. Also good.

さらに上記の例では、ＬＥＤを４つのＬＥＤ部に分け、各ＬＥＤ部がそれぞれ同一のＶｆとなるよう構成しているが、同一のＶｆでなくても良い。例えばＬＥＤ部１のＶｆをできるだけ低く、すなわちＬＥＤ一個分の３．０Ｖ程度に設定できれば、電流の立ち上がりタイミングを早く、立下りタイミングを遅くできる。このことは、高調波を減少させるのにさらに有利となる。またこの方法を使用すれば、ＬＥＤ部の数とＶｆ設定を自由に選択でき、さらに電流波形を正弦波に近似できるため、より柔軟性を高めて高調波抑制を実現することが容易となる。
（点灯パターン） Further, in the above example, the LEDs are divided into four LED portions, and each LED portion is configured to have the same Vf. However, the LEDs may not be the same Vf. For example, if the Vf of the LED unit 1 can be set as low as possible, that is, about 3.0 V for one LED, the current rise timing can be advanced and the fall timing can be delayed. This is further advantageous for reducing harmonics. If this method is used, the number of LED units and the Vf setting can be freely selected, and the current waveform can be approximated to a sine wave. Therefore, it is easy to increase the flexibility and suppress harmonics.
(Lighting pattern)

ここで比較のため、本発明者が先に開発した図７に示す発光ダイオード駆動装置９００のＬＥＤ点灯パターンと、実施例１に係る発光ダイオード駆動装置６００のＬＥＤ点灯パターンを、図８Ａと図８Ｂにそれぞれ示す。これらの図に示すように、図７の整流回路５０を使用して交流電圧を全波整流し、電流検出器４０でもって検出された出力ラインＯＬの通電量に基づいて、電流制御部２０で多段に接続した第一ＬＥＤ集合体１０（第一ＬＥＤ部１１〜第四ＬＥＤ部１４）を点灯駆動する場合は、図８Ａのように整流電圧の低い領域で駆動されるＬＥＤ部の点灯時間が長く、高い領域で駆動されるＬＥＤ部の点灯時間が短くなる傾向がある。各ＬＥＤ部の点灯時間が異なると、それぞれの光度も異なる。これは、交流電源電圧の低い時から、徐々に高くなるに従って、各ＬＥＤ部が順番に点灯開始、最大電圧に達した後、徐々に低くなるに従って、点灯順とは逆の順番で消灯するためである。このため、ＬＥＤ部の点灯期間にばらつきが生じることが避けられない。この結果、ちらつきが生じたり、ＬＥＤ部の点灯時間に応じて発熱量が異なるため、均一に放熱するための機構が必要になるといった課題があった。   Here, for comparison, the LED lighting pattern of the light emitting diode driving device 900 shown in FIG. 7 previously developed by the present inventor and the LED lighting pattern of the light emitting diode driving device 600 according to Example 1 are shown in FIGS. 8A and 8B. Respectively. As shown in these figures, the current control unit 20 performs full-wave rectification of the AC voltage using the rectifier circuit 50 of FIG. 7 and based on the energization amount of the output line OL detected by the current detector 40. When the first LED assembly 10 (the first LED unit 11 to the fourth LED unit 14) connected in multiple stages is driven to be lit, the lighting time of the LED unit that is driven in a low rectified voltage region as shown in FIG. 8A. There is a tendency that the lighting time of the LED unit driven in a long and high region is shortened. When the lighting times of the LED units are different, the light intensity is also different. This is because each LED unit starts lighting in order as it gradually increases from the time when the AC power supply voltage is low, and after it reaches the maximum voltage, it turns off in the reverse order of the lighting order as it gradually decreases. It is. For this reason, it is inevitable that variations occur in the lighting period of the LED section. As a result, there has been a problem that flickering occurs or the amount of heat generated varies depending on the lighting time of the LED unit, so that a mechanism for uniformly radiating heat is required.

これに対して、実施例１に係る発光ダイオード駆動装置６００では、半波整流して、各整流電圧でＬＥＤ部を点灯する順序を逆順にするように回路を構成することで、ＬＥＤ部の点灯時間を全体として均一化している。具体的には、交流電源ＡＰの周波数サイクルのうち、ある半周期においては第一ＬＥＤ部１１→第二ＬＥＤ部１２→第三ＬＥＤ部１３→第四ＬＥＤ部１４の順に点灯開始し、さらに第四ＬＥＤ部１４→第三ＬＥＤ部１３→第二ＬＥＤ部１２→第一ＬＥＤ部１１の順番で消灯する。次の半周期においては、第四ＬＥＤ部１４→第三ＬＥＤ部１３→第二ＬＥＤ部１２→第一ＬＥＤ部１１の順に点灯開始し、第一ＬＥＤ部１１→第二ＬＥＤ部１２→第三ＬＥＤ部１３→第四ＬＥＤ部１４の順で消灯する。このように駆動装置を構成することで、各ＬＥＤ部の光度差を抑制できる。この結果、各ＬＥＤ部の点灯時間をほぼ一定に揃えてちらつきを抑制し、また発熱量も均一化されるので、放熱機構も各ＬＥＤ部で同様の機構とすることができ、構成の簡素化が図られる。また第一整流電圧と第二整流電圧の各期間でＬＥＤ部を駆動する回路を個別に用意することで、点灯制御も簡素化できる。いいかえると、共通の駆動回路を用いて電流の通電方向を逆転させるような複雑なスイッチングを行わないことで、回路構成や制御を簡素化して、安価で信頼性の高い発光ダイオード駆動装置を実現できる。   On the other hand, in the light emitting diode driving device 600 according to the first embodiment, the LEDs are turned on by configuring the circuit so as to reverse the order in which the LEDs are turned on with each rectified voltage by half-wave rectification. The time is made uniform as a whole. Specifically, in a certain half cycle of the frequency cycle of the AC power supply AP, lighting starts in the order of the first LED unit 11 → the second LED unit 12 → the third LED unit 13 → the fourth LED unit 14, and The lights are turned off in the order of the four LED parts 14 → the third LED part 13 → the second LED part 12 → the first LED part 11. In the next half cycle, lighting starts in the order of the fourth LED unit 14 → the third LED unit 13 → the second LED unit 12 → the first LED unit 11, and the first LED unit 11 → the second LED unit 12 → the third. The LED unit 13 is turned off in the order of the fourth LED unit 14. By configuring the drive device in this way, it is possible to suppress the light intensity difference between the LED units. As a result, the lighting time of each LED unit is made almost constant to suppress flickering, and the amount of heat generation is made uniform, so the heat dissipation mechanism can be the same mechanism in each LED unit, and the configuration is simplified Is planned. Moreover, lighting control can also be simplified by preparing the circuit which drives an LED part separately in each period of a 1st rectification voltage and a 2nd rectification voltage. In other words, by using a common drive circuit and not performing complicated switching that reverses the direction of current flow, the circuit configuration and control can be simplified, and an inexpensive and highly reliable LED drive device can be realized. .

また本発明者が比較試験を行い、各ＬＥＤ部のＶｆを等しくし、図３と図７でそれぞれ３０Ｖ程度（×４段）としたところ、図７の発光ダイオード駆動装置９００では交流電源ＡＰに相似の電流波形駆動で第一ＬＥＤ部１１と第四ＬＥＤ部１４の電力差が４０％以上あったところ、図３の発光ダイオード駆動装置３００では第一ＬＥＤ部１１と第二ＬＥＤ部１２の電力差を１５％とすることができた。これにより、ＬＥＤを実装する際、実装場所による明暗差を考慮して各ＬＥＤ部のＬＥＤ素子の配置を考慮する必要をなくすことができる。また、ＬＥＤ部ごとの電力差のため、特定のＬＥＤ部のＬＥＤ素子に過度な電力負荷をかけることもなくなり、灯具寿命を延長できる。さらにまた、発光ダイオード駆動装置側、ＬＥＤ部側の素子の発熱も均一化でき、放熱設計においても有利となる。
＜実施例２＞ In addition, the inventor conducted a comparative test to make the Vf of each LED portion equal, and set each to about 30 V (× 4 stages) in FIGS. 3 and 7. In the LED driving device 900 of FIG. When the power difference between the first LED unit 11 and the fourth LED unit 14 is 40% or more in the similar current waveform driving, the power of the first LED unit 11 and the second LED unit 12 in the light emitting diode driving device 300 of FIG. The difference could be 15%. Thereby, when mounting the LED, it is possible to eliminate the need to consider the arrangement of the LED elements of each LED unit in consideration of the light / dark difference depending on the mounting location. Further, due to the power difference between the LED units, an excessive power load is not applied to the LED elements of the specific LED unit, and the lamp life can be extended. Furthermore, the heat generation of the elements on the light emitting diode driving device side and the LED unit side can be made uniform, which is advantageous in heat dissipation design.
<Example 2>

以上の実施例１に係る発光ダイオード駆動装置６００は、ＬＥＤ部毎の点灯時間の長短を均一化することで、発光のちらつきを抑制できる。さらに発光のちらつきを抑制するために、半波整流された第一整流電圧や第二整流電圧を平滑化することもできる。このような回路例を実施例２として、図９に示す。ここでは、図５に示した平滑化回路を備える発光ダイオード駆動装置の具体的な回路構成例を示している。図９の発光ダイオード駆動装置７００において、実施例１と同様の部材については同じ名称、符号を付して詳細説明を省略する。   The light emitting diode driving device 600 according to the first embodiment described above can suppress flickering of light emission by equalizing the length of the lighting time for each LED unit. Furthermore, in order to suppress flickering of light emission, the first rectified voltage and the second rectified voltage subjected to half-wave rectification can be smoothed. An example of such a circuit is shown in FIG. Here, a specific circuit configuration example of a light emitting diode driving device including the smoothing circuit shown in FIG. 5 is shown. In the light emitting diode driving device 700 of FIG. 9, members similar to those in the first embodiment are denoted by the same names and reference numerals, and detailed description thereof is omitted.

発光ダイオード駆動装置７００は、平滑化回路として平滑コンデンサ８０を備えている。平滑コンデンサ８０を設けることで、半波整流された第一整流電圧及び第二整流電圧がそれぞれ平滑化される結果、電圧の低い区間が減少されて、このような低電圧の区間における第一ＬＥＤ部１１や第四ＬＥＤ部１４が点灯される区間が長くなり、より一層発光むらを抑制できる利点が得られる。なお、平滑コンデンサ８０には、一般に大容量の電解コンデンサが用いられる。ただ電解コンデンサは大容量の反面、電解液の蒸発などに起因する経時劣化が生じ、寿命があるため、電解コンデンサの寿命でもって発光ダイオード駆動装置の寿命が決定される。   The light emitting diode driving device 700 includes a smoothing capacitor 80 as a smoothing circuit. By providing the smoothing capacitor 80, the first rectified voltage and the second rectified voltage that have been half-wave rectified are respectively smoothed. As a result, the low voltage section is reduced, and the first LED in such a low voltage section is reduced. The section in which the part 11 and the fourth LED part 14 are turned on becomes longer, and an advantage that the uneven light emission can be further suppressed is obtained. The smoothing capacitor 80 is generally a large-capacity electrolytic capacitor. However, although the electrolytic capacitor has a large capacity, it deteriorates with time due to evaporation of the electrolytic solution and has a lifetime, so that the lifetime of the LED driving device is determined by the lifetime of the electrolytic capacitor.

以上のように本発明の実施例によれば、交流電源をスイッチング電源等で直流に変換する電圧変換回路を用いることなく、交流電源に接続して高効率で駆動しつつ、従来の課題であったＬＥＤ毎の点灯期間のばらつきを、比較的簡素な構成で抑制できる利点が得られる。すなわち発光ダイオードは定電圧素子であることから、交流電源を整流しただけの整流電圧で発光ダイオードを点灯駆動しようとすると、ＬＥＤ部毎に点灯時間、電力が異なり、ＬＥＤ部間で照度差が生じてしまう。仮にすべてのＬＥＤ部が、例えば同一パッケージ上や同一チップ上に形成され、または単体のＬＥＤが比較的小さい面積に配置されていれば、その面積に対して比較的遠方における照明、例えば天井照明やＬＥＤ電球ではこのような照度差が目立たず、特に問題とならない。しかしながら、ＬＥＤが比較的大きい面積に配置されて、均一な照射照度を求められる用途、例えばバックライト照明や看板照明などでは、照度差が目立つ傾向にある。さらに一方では、一部のＬＥＤの点灯期間が長いと、それだけ発熱量も多くなるが、点灯時間の短いＬＥＤでは発熱量も少なくなる。一部のＬＥＤが劣化して点灯しなくなると発光装置全体の寿命となってしまうことから、特定のＬＥＤの劣化の進行を抑制する必要がある。これを防ぐには、放熱性能を均一化させる特別な放熱機構が必要となる。これに対して本発明の実施例では、ＬＥＤ部の点灯順序を一定とせず、半波整流された第一整流電圧と第二整流電圧とで互いに逆順となるように点灯回路を構成したことで、ＬＥＤ部同士の点灯時間を均一化している。この結果、ＬＥＤ間の照度差を解消し、発熱量も均一化されて、装置の寿命や信頼性を向上させ、より高品質な照明や漁灯として好適に利用できる。   As described above, according to the embodiment of the present invention, it is a conventional problem that the AC power source is connected to the AC power source and driven with high efficiency without using the voltage conversion circuit that converts the AC power source to DC with a switching power source or the like. Further, there is an advantage that the variation in the lighting period for each LED can be suppressed with a relatively simple configuration. In other words, since the light-emitting diode is a constant voltage element, when the light-emitting diode is lit and driven with a rectified voltage obtained by rectifying the AC power supply, the lighting time and power are different for each LED unit, and an illuminance difference occurs between the LED units. End up. If all LED units are formed on, for example, the same package or the same chip, or if a single LED is disposed in a relatively small area, illumination at a relatively distant location relative to that area, such as ceiling illumination, With an LED bulb, such a difference in illuminance is not noticeable, and there is no particular problem. However, in applications where LEDs are arranged in a relatively large area and uniform irradiation illuminance is required, such as backlight illumination and signboard illumination, the illuminance difference tends to be noticeable. On the other hand, if the lighting period of some of the LEDs is long, the amount of heat generation increases accordingly, but the amount of heat generation of the LEDs having a short lighting time decreases. If some of the LEDs deteriorate and stop lighting, the life of the entire light emitting device is reached. Therefore, it is necessary to suppress the progress of deterioration of specific LEDs. In order to prevent this, a special heat dissipation mechanism that equalizes the heat dissipation performance is required. In contrast, in the embodiment of the present invention, the lighting circuit is configured so that the first rectified voltage and the second rectified voltage that are half-wave rectified are opposite to each other without making the lighting order of the LED portions constant. The lighting time between the LED portions is made uniform. As a result, the difference in illuminance between LEDs is eliminated, the amount of heat generation is made uniform, the life and reliability of the apparatus are improved, and it can be suitably used as higher quality lighting and fishing lights.

本発明に係る発光ダイオード駆動装置及びこれを用いた照明、漁灯並びに発光ダイオード駆動装置の駆動方法は、照明装置や漁灯として好適に利用できる。特にＬＥＤ部のちらつきを抑制することで、ＬＥＤ漁灯のもとで作業する作業者が抱く高い照度の照明光のちらつきによる不快感を低減できる。   The light emitting diode driving device according to the present invention, the illumination and fishing light using the same, and the driving method of the light emitting diode driving device can be suitably used as a lighting device and a fishing light. In particular, by suppressing the flickering of the LED portion, it is possible to reduce discomfort due to flickering of high illumination light that an operator working under an LED fishing light has.

１００、２００、３００、４００、５００、６００、７００、９００…発光ダイオード駆動装置
１…第一回路群
２…第二回路群
１０…第一ＬＥＤ集合体
１１…第一ＬＥＤ部
１２…第二ＬＥＤ部
１３…第三ＬＥＤ部
１４…第四ＬＥＤ部
２０…電流制御部
２１…第一通電制御部
２２…第二通電制御部
２３…第三通電制御部
２４…第四通電制御部
２１Ｂ…第一通電制御トランジスタ
２２Ｂ…第二通電制御トランジスタ
２３Ｂ…第三通電制御トランジスタ
２４Ｂ…第四通電制御トランジスタ
２５Ｂ…第五通電制御トランジスタ
２６Ｂ…第六通電制御トランジスタ
２７Ｂ…第七通電制御トランジスタ
２８Ｂ…第八通電制御トランジスタ
２５…第五通電制御部
２６…第六通電制御部
２７…第七通電制御部
２８…第八通電制御部
３１…第一電流制御部；３１Ｂ…オペアンプ
３１Ｂ０…定電圧電源
３１Ｂ１…オペアンプ電源用トランジスタ
３１Ｂ２…ツェナーダイオード
３１Ｂ３…ツェナー電圧設定抵抗
３２…第二電流制御部；３２Ｂ…オペアンプ
３２Ｂ０…定電圧電源
３２Ｂ１…オペアンプ電源用トランジスタ
３２Ｂ２…ツェナーダイオード
３２Ｂ３…ツェナー電圧設定抵抗
４０…電流検出器
４１…第一電流検出器
４１Ｂ…第一電流検出抵抗
４２…第二電流検出器
４２Ｂ…第二電流検出抵抗
５０…整流回路
５１…第一半波整流回路
５２…第二半波整流回路
６１…第一高調波抑制信号生成部
６１ａ、６１ｂ…第一高調波抑制信号生成抵抗
６２…第二高調波抑制信号生成部
６２ａ、６２ｂ…第二高調波抑制信号生成抵抗
７１…第一電流制御信号付与部
７１ａ、７１ｂ、７１ｃ…電流制御信号付与ツェナーダイオード
７２…第二電流制御信号付与部
７２ａ、７２ｂ、７２ｃ…電流制御信号付与ツェナーダイオード
８０…平滑コンデンサ
８２…バイパスコンデンサ
１６１、１６２、１６３、１６４、１６５、１６６…ＬＥＤブロック
１６７…スイッチ制御部
１７１、１７２、１７３、１７４…発光ブロック
１７７…スイッチ制御ロジック
ＡＰ…交流電源
ＯＬ…出力ライン
ＢＰ１…第一バイパス経路
ＢＰ２…第二バイパス経路
ＢＰ３…第三バイパス経路
ＢＰ４…第四バイパス経路
ＳＡ、ＳＢ…スイッチブロック
ＳＡ＿１、ＳＡ＿２、ＳＡ＿３、ＳＢ＿１、ＳＢ＿２、ＳＢ＿３…スイッチ 100, 200, 300, 400, 500, 600, 700, 900 ... Light-emitting diode driving device 1 ... First circuit group 2 ... Second circuit group 10 ... First LED assembly 11 ... First LED unit 12 ... Second LED Unit 13 ... Third LED unit 14 ... Fourth LED unit 20 ... Current control unit 21 ... First energization control unit 22 ... Second energization control unit 23 ... Third energization control unit 24 ... Fourth energization control unit 21B ... First Energization control transistor 22B ... Second energization control transistor 23B ... Third energization control transistor 24B ... Fourth energization control transistor 25B ... Fifth energization control transistor 26B ... Sixth energization control transistor 27B ... Seventh energization control transistor 28B ... Eighth energization control transistor Control transistor 25 ... fifth energization control unit 26 ... sixth energization control unit 27 ... seventh energization control unit 28 ... eighth energization control unit 31 ... first current control unit; 31 Operational amplifier 31B0 Constant voltage power supply 31B1 Operational amplifier power supply transistor 31B2 Zener diode 31B3 Zener voltage setting resistor 32 Second current control unit 32B Operational amplifier 32B0 Constant voltage power supply 32B1 Operational amplifier power supply transistor 32B2 Zener diode 32B3 ... Zener voltage setting resistor 40 ... Current detector 41 ... First current detector 41B ... First current detection resistor 42 ... Second current detector 42B ... Second current detection resistor 50 ... Rectifier circuit 51 ... First half-wave rectifier circuit 52 ... 2nd half wave rectification circuit 61 ... 1st harmonic suppression signal generation part 61a, 61b ... 1st harmonic suppression signal generation resistance 62 ... 2nd harmonic suppression signal generation part 62a, 62b ... 2nd harmonic suppression signal Generating resistor 71... First current control signal applying unit 71a, 71b, 71c... Current control signal applying Zener Diode 72 ... Second current control signal applying unit 72a, 72b, 72c ... Current control signal applying Zener diode 80 ... Smoothing capacitor 82 ... Bypass capacitors 161, 162, 163, 164, 165, 166 ... LED block 167 ... Switch control unit 171 , 172, 173, 174 ... light emission block 177 ... switch control logic AP ... AC power supply OL ... output line BP1 ... first bypass route BP2 ... second bypass route BP3 ... third bypass route BP4 ... fourth bypass route SA, SB ... Switch block SA_1, SA_2, SA_3, SB_1, SB_2, SB_3 ... switch

Claims (9)

交流電源に接続されて、該交流電源の交流電圧を半波整流して第一整流電圧を得るための第一半波整流回路と、
前記第一半波整流回路の出力側と直列に接続された、少なくとも一のＬＥＤ素子を含む第一ＬＥＤ部と、
前記第一ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第二ＬＥＤ部と、
前記第二ＬＥＤ部と並列で、且つ前記第一ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部への通電量を制御するための第一通電制御部と、
前記第一ＬＥＤ部及び第二ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部及び前記第二ＬＥＤ部への通電量を制御するための第二通電制御部と、
第一整流電圧が印加される状態で、前記第一ＬＥＤ部を流れる電流値に基づいて、前記第一通電制御部及び第二通電制御部を制御するための第一電流制御部と、
共通の交流電源に接続されて、該交流電源の交流電圧を前記第一半波整流回路と異なるタイミングで半波整流して第二整流電圧を得るための第二半波整流回路と、
前記第一ＬＥＤ部と並列で、且つ前記第二ＬＥＤ部と直列に接続された、第二整流電圧が印加される状態で前記第二ＬＥＤ部への通電量を制御するための第六通電制御部と、
前記第二半波整流回路の出力側と前記第一ＬＥＤ部との間で前記第一ＬＥＤ部と直列に接続された、第二整流電圧が印加される状態で前記第一ＬＥＤ部及び第二ＬＥＤ部への通電量を制御するための第五通電制御部と
第二整流電圧が印加される状態で、前記第二ＬＥＤ部を流れる電流値に基づいて、前記第五通電制御部及び第六通電制御部を制御するための第二電流制御部と、
備える発光ダイオード駆動装置。 A first half-wave rectifier circuit connected to an AC power source for half-wave rectifying the AC voltage of the AC power source to obtain a first rectified voltage;
A first LED unit including at least one LED element connected in series with the output side of the first half-wave rectifier circuit;
A second LED unit including at least one LED element connected in series with the first LED unit;
A first energization control for controlling the energization amount to the first LED unit in a state where the first rectified voltage is applied in parallel with the second LED unit and connected in series with the first LED unit. And
Second energization for controlling the energization amount to the first LED unit and the second LED unit in a state where the first rectified voltage is applied, which is connected in series with the first LED unit and the second LED unit. A control unit;
A first current control unit for controlling the first energization control unit and the second energization control unit based on a current value flowing through the first LED unit in a state where the first rectified voltage is applied;
A second half-wave rectifier circuit connected to a common alternating-current power source to obtain a second rectified voltage by half-wave rectifying the alternating-current voltage of the alternating-current power source at a timing different from that of the first half-wave rectifier circuit;
A sixth energization control for controlling the energization amount to the second LED unit in a state where a second rectified voltage is applied in parallel with the first LED unit and in series with the second LED unit. And
The first LED unit and the second LED unit are connected in series with the first LED unit between the output side of the second half-wave rectifier circuit and the first LED unit, and a second rectified voltage is applied. A fifth energization control unit for controlling an energization amount to the LED unit, and a fifth rectification voltage and a sixth energization control unit based on a current value flowing through the second LED unit in a state where a second rectified voltage is applied; A second current control unit for controlling the energization control unit;
A light emitting diode driving device. 請求項１に記載の発光ダイオード駆動装置であって、
前記第一電流制御部は、前記第一半波整流回路の出力側から第一整流電圧が印加される状態で、前記第一ＬＥＤ部を点灯させ、次いで該第一ＬＥＤ部を点灯させたまま前記第二ＬＥＤ部を点灯させ、さらに該第一ＬＥＤ部を点灯させたまま前記第二ＬＥＤ部を消灯させるよう点灯駆動させ、
前記第二電流制御部は、前記第二半波整流回路の出力側から第二整流電圧が印加される状態で、前記第二ＬＥＤ部を点灯させ、次いで該第二ＬＥＤ部を点灯させたまま前記第一ＬＥＤ部を点灯させ、さらに該第二ＬＥＤ部を点灯させたまま前記第一ＬＥＤ部を消灯させるよう点灯駆動させてなる発光ダイオード駆動装置。 The light-emitting diode driving device according to claim 1,
The first current control unit turns on the first LED unit in a state where the first rectified voltage is applied from the output side of the first half-wave rectifier circuit, and then turns on the first LED unit. The second LED unit is turned on, and further driven to turn off the second LED unit while the first LED unit is turned on,
The second current control unit turns on the second LED unit in a state where a second rectified voltage is applied from the output side of the second half-wave rectifier circuit, and then turns on the second LED unit. A light-emitting diode drive device that is turned on so that the first LED unit is turned on, and the second LED unit is turned on while the first LED unit is turned off. 請求項１又は２に記載の発光ダイオード駆動装置であって、さらに、
前記第二ＬＥＤ部の下流側に、前記第二ＬＥＤ部と直列接続された、前記第一ＬＥＤ部を流れる電流量を検出するための第一電流検出部を備える発光ダイオード駆動装置。 The light-emitting diode driving device according to claim 1, further comprising:
A light emitting diode driving device comprising a first current detection unit for detecting the amount of current flowing through the first LED unit, connected in series with the second LED unit, on the downstream side of the second LED unit. 請求項１〜３のいずれか一項に記載の発光ダイオード駆動装置であって、さらに、
前記第一ＬＥＤ部の上流側に、前記第一ＬＥＤ部と直列接続された、前記第二ＬＥＤ部を流れる電流量を検出するための第二電流検出部を備える発光ダイオード駆動装置。 The light-emitting diode driving device according to any one of claims 1 to 3, further comprising:
A light emitting diode driving device comprising a second current detection unit for detecting the amount of current flowing through the second LED unit, connected in series with the first LED unit, upstream of the first LED unit. 交流電源に接続されて、該交流電源の交流電圧を半波整流して第一整流電圧を得るための第一半波整流回路と、
前記第一半波整流回路の出力側と直列に接続された、少なくとも一のＬＥＤ素子を含む第一ＬＥＤ部と、
前記第一ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第二ＬＥＤ部と、
前記第二ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第三ＬＥＤ部と、
前記第二ＬＥＤ部と並列で、且つ前記第一ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部への通電量を制御するための第一通電制御部と、
前記第一ＬＥＤ部及び第二ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部及び前記第二ＬＥＤ部への通電量を制御するための第二通電制御部と、
前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部への通電量を制御するための第三通電制御部と、
第一整流電圧が印加される状態で、前記第一ＬＥＤ部を流れる電流値に基づいて、前記第一通電制御部、第二通電制御部及び第三通電制御部を制御するための第一電流制御部と、
共通の交流電源に接続されて、該交流電源の交流電圧を前記第一半波整流回路と異なるタイミングで半波整流して第二整流電圧を得るための第二半波整流回路と、
前記第三ＬＥＤ部から見て、該第三ＬＥＤ部と直列で、且つ前記第二ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第三ＬＥＤ部への通電量を制御するための第七通電制御部と、
前記第二ＬＥＤ部から見て、該第二ＬＥＤ部と直列で、且つ前記第一ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第二ＬＥＤ部及び第三ＬＥＤ部への通電量を制御するための第六通電制御部と、
前記第二半波整流回路の出力側と前記第一ＬＥＤ部との間で前記第一ＬＥＤ部と直列に接続された、第二整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部への通電量を制御するための第五通電制御部と、
第二整流電圧が印加される状態で、前記第三ＬＥＤ部を流れる電流値に基づいて、前記第五通電制御部、第六通電制御部、第七通電制御部及び第八通電制御部を制御するための第二電流制御部と、
備える発光ダイオード駆動装置。 A first half-wave rectifier circuit connected to an AC power source for half-wave rectifying the AC voltage of the AC power source to obtain a first rectified voltage;
A first LED unit including at least one LED element connected in series with the output side of the first half-wave rectifier circuit;
A second LED unit including at least one LED element connected in series with the first LED unit;
A third LED part including at least one LED element connected in series with the second LED part;
A first energization control for controlling the energization amount to the first LED unit in a state where the first rectified voltage is applied in parallel with the second LED unit and connected in series with the first LED unit. And
Second energization for controlling the energization amount to the first LED unit and the second LED unit in a state where the first rectified voltage is applied, which is connected in series with the first LED unit and the second LED unit. A control unit;
Energization to the first LED unit, the second LED unit, and the third LED unit connected in series with the first LED unit, the second LED unit, and the third LED unit in a state where a first rectified voltage is applied. A third energization control unit for controlling the amount;
A first current for controlling the first energization control unit, the second energization control unit, and the third energization control unit based on a current value flowing through the first LED unit in a state where the first rectified voltage is applied. A control unit;
A second half-wave rectifier circuit connected to a common alternating-current power source to obtain a second rectified voltage by half-wave rectifying the alternating-current voltage of the alternating-current power source at a timing different from that of the first half-wave rectifier circuit;
When viewed from the third LED unit, the amount of current supplied to the third LED unit in a state where a second rectified voltage is applied in series with the third LED unit and in parallel with the second LED unit. A seventh energization control unit for controlling
When viewed from the second LED unit, the second LED unit and the third LED are connected in series with the second LED unit and in parallel with the first LED unit with a second rectified voltage applied. A sixth energization control unit for controlling the energization amount to the unit;
The first LED unit and the second LED unit connected in series with the first LED unit between the output side of the second half-wave rectifier circuit and the first LED unit, with the second rectified voltage applied. A fifth energization control unit for controlling the energization amount to the LED unit and the third LED unit;
Control the fifth energization control unit, the sixth energization control unit, the seventh energization control unit, and the eighth energization control unit based on the current value flowing through the third LED unit in a state where the second rectified voltage is applied. A second current control unit for
A light emitting diode driving device. 交流電源に接続されて、該交流電源の交流電圧を半波整流して第一整流電圧を得るための第一半波整流回路と、
前記第一半波整流回路の出力側と直列に接続された、少なくとも一のＬＥＤ素子を含む第一ＬＥＤ部と、
前記第一ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第二ＬＥＤ部と、
前記第二ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第三ＬＥＤ部と、
前記第三ＬＥＤ部と直列に接続された、少なくとも一のＬＥＤ素子を含む第四ＬＥＤ部と、
前記第二ＬＥＤ部と並列で、且つ前記第一ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部への通電量を制御するための第一通電制御部と、
前記第一ＬＥＤ部及び第二ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部及び前記第二ＬＥＤ部への通電量を制御するための第二通電制御部と、
前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部及び第三ＬＥＤ部への通電量を制御するための第三通電制御部と、
前記第一ＬＥＤ部、第二ＬＥＤ部、第三ＬＥＤ部及び第四ＬＥＤ部と直列に接続された、第一整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部、第三ＬＥＤ部及び第四ＬＥＤ部への通電量を制御するための第四通電制御部と、
第一整流電圧が印加される状態で、前記第一ＬＥＤ部を流れる電流値に基づいて、前記第一通電制御部、第二通電制御部、第三通電制御部及び第四通電制御部を制御するための第一電流制御部と、
共通の交流電源に接続されて、該交流電源の交流電圧を前記第一半波整流回路と異なるタイミングで半波整流して第二整流電圧を得るための第二半波整流回路と、
前記第四ＬＥＤ部と直列で、且つ前記第三ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第四ＬＥＤ部への通電量を制御するための第八通電制御部と、
前記第三ＬＥＤ部と直列で、且つ前記第二ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第三ＬＥＤ部及び第四ＬＥＤ部への通電量を制御するための第七通電制御部と、
前記第二ＬＥＤ部と直列で、且つ前記第一ＬＥＤ部と並列に接続された、第二整流電圧が印加される状態で前記第二ＬＥＤ部、第三ＬＥＤ部及び第四ＬＥＤ部への通電量を制御するための第六通電制御部と、
前記第二半波整流回路の出力側と前記第一ＬＥＤ部との間で前記第一ＬＥＤ部と直列に接続された、第二整流電圧が印加される状態で前記第一ＬＥＤ部、第二ＬＥＤ部、第三ＬＥＤ部及び第四ＬＥＤ部への通電量を制御するための第五通電制御部と、
第二整流電圧が印加される状態で、前記第四ＬＥＤ部を流れる電流値に基づいて、前記第五通電制御部、第六通電制御部、第七通電制御部及び第八通電制御部を制御するための第二電流制御部と、
備える発光ダイオード駆動装置。 A first half-wave rectifier circuit connected to an AC power source for half-wave rectifying the AC voltage of the AC power source to obtain a first rectified voltage;
A first LED unit including at least one LED element connected in series with the output side of the first half-wave rectifier circuit;
A second LED unit including at least one LED element connected in series with the first LED unit;
A third LED part including at least one LED element connected in series with the second LED part;
A fourth LED unit including at least one LED element connected in series with the third LED unit;
A first energization control for controlling the energization amount to the first LED unit in a state where the first rectified voltage is applied in parallel with the second LED unit and connected in series with the first LED unit. And
Second energization for controlling the energization amount to the first LED unit and the second LED unit in a state where the first rectified voltage is applied, which is connected in series with the first LED unit and the second LED unit. A control unit;
Energization to the first LED unit, the second LED unit, and the third LED unit connected in series with the first LED unit, the second LED unit, and the third LED unit in a state where a first rectified voltage is applied. A third energization control unit for controlling the amount;
The first LED unit, the second LED unit, the third LED unit connected in series with the first LED unit, the second LED unit, the third LED unit, and the fourth LED unit in a state where a first rectified voltage is applied. A fourth energization control unit for controlling the energization amount to the LED unit and the fourth LED unit;
The first energization control unit, the second energization control unit, the third energization control unit, and the fourth energization control unit are controlled based on the current value flowing through the first LED unit in a state where the first rectified voltage is applied. A first current control unit for
A second half-wave rectifier circuit connected to a common alternating-current power source to obtain a second rectified voltage by half-wave rectifying the alternating-current voltage of the alternating-current power source at a timing different from that of the first half-wave rectifier circuit;
An eighth energization control for controlling an energization amount to the fourth LED unit in a state where a second rectified voltage is applied, which is connected in series with the fourth LED unit and in parallel with the third LED unit. And
In order to control the energization amount to the third LED part and the fourth LED part in a state where a second rectified voltage is applied in series with the third LED part and in parallel with the second LED part. A seventh energization control unit of
Energizing the second LED unit, the third LED unit, and the fourth LED unit in a state where a second rectified voltage is applied in series with the second LED unit and in parallel with the first LED unit A sixth energization control unit for controlling the amount;
The first LED unit and the second LED unit connected in series with the first LED unit between the output side of the second half-wave rectifier circuit and the first LED unit, with the second rectified voltage applied. A fifth energization control unit for controlling the energization amount to the LED unit, the third LED unit, and the fourth LED unit;
Controls the fifth energization control unit, the sixth energization control unit, the seventh energization control unit, and the eighth energization control unit based on the current value flowing through the fourth LED unit in a state where the second rectified voltage is applied. A second current control unit for
A light emitting diode driving device. 請求項１〜６のいずれか一に記載の発光ダイオード駆動装置であって、さらに、
前記第一ＬＥＤ部及び第二ＬＥＤ部の直列接続体に対して、並列に接続された平滑コンデンサを備える発光ダイオード駆動装置。 The light-emitting diode driving device according to any one of claims 1 to 6, further comprising:
A light emitting diode driving device comprising a smoothing capacitor connected in parallel to the series connection body of the first LED part and the second LED part. 請求項１〜７のいずれか一に記載の発光ダイオード駆動装置で駆動される漁灯。   A fishing lamp driven by the light emitting diode driving device according to claim 1. 請求項１〜７のいずれか一に記載の発光ダイオード駆動装置で駆動される照明。   Illumination driven by the light emitting diode driving device according to any one of claims 1 to 7.
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