JP2020187954A - Light source lighting device - Google Patents

Light source lighting device Download PDF

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JP2020187954A
JP2020187954A JP2019092764A JP2019092764A JP2020187954A JP 2020187954 A JP2020187954 A JP 2020187954A JP 2019092764 A JP2019092764 A JP 2019092764A JP 2019092764 A JP2019092764 A JP 2019092764A JP 2020187954 A JP2020187954 A JP 2020187954A
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led light
light source
light sources
lighting device
switching element
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JP6916837B2 (en
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明彦 山下
Akihiko Yamashita
明彦 山下
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Honda Motor Co Ltd
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Honda Motor Co 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]
    • H05B45/30—Driver circuits
    • 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

Abstract

To provide a light source lighting device capable of making an LED light source look as if lighting, even when supply voltage to the LED light source lowers, without using a booster.SOLUTION: A light source lighting device (30) having a power input part (31), multiple LED light sources (L1-L4, L11-L14, L21-L24) disposed in lighters (10, 70) while interconnected in series, and an output part (33) for supplying power to the LED light sources, includes a switching element (S) for short-circuiting terminals of the LED light sources. The switching element (S) is connected in parallel with at least two LED light sources (L3, L4, L13, L14, L23, L24) out of the multiple LED light sources connected in series, When a current value (A) outputted from the output part (33) goes below a prescribed threshold level (B), a control section (35) controls blinking of LED light sources by switching on-off state of the switching element (S) alternately.SELECTED DRAWING: Figure 3

Description

本発明は、光源点灯装置に係り、特に、車載電源から供給される電力で灯火器等の光源を点灯させるための光源点灯装置に関する。 The present invention relates to a light source lighting device, and more particularly to a light source lighting device for lighting a light source such as a lamp with electric power supplied from an in-vehicle power source.

従来から、車両に備えられる灯火器等の光源を点灯するための光源点灯装置において、車載バッテリの劣化や発電機の性能低下等によって光源に供給する電力が低下した際に、昇圧装置を用いることなく、光源の発光状態を可能な限り維持する手法が検討されている。 Conventionally, in a light source lighting device for lighting a light source such as a lamp provided in a vehicle, a booster is used when the power supplied to the light source decreases due to deterioration of an in-vehicle battery or performance deterioration of a generator. However, a method of maintaining the light emitting state of the light source as much as possible is being studied.

特許文献１には、直列接続された複数のＬＥＤ光源を有する灯火器において、光源に供給する電力が所定値より低下した際に、所定のＬＥＤ光源を短絡させて消灯することで他のＬＥＤ光源の点灯状態を維持するようにした光源点灯装置が開示されている。 According to Patent Document 1, in a lighting device having a plurality of LED light sources connected in series, when the power supplied to the light source drops below a predetermined value, the predetermined LED light source is short-circuited and turned off to turn off another LED light source. A light source lighting device that maintains the lighting state of the light source is disclosed.

特開２０１８−５６０９０号公報JP-A-2018-56090

しかし、特許文献１の技術では、昇圧装置を用いないことで光源点灯装置の複雑化を避けることができるものの、所定のＬＥＤ光源を消灯することで発光領域の一部に欠けが生じてしまうため、改善が求められていた。 However, in the technique of Patent Document 1, although the complexity of the light source lighting device can be avoided by not using the booster, a part of the light emitting region is chipped by turning off the predetermined LED light source. , Improvement was required.

本発明の目的は、上記従来技術の課題を解決し、ＬＥＤ光源への供給電力が低下した際でも、昇圧装置を用いることなく、ＬＥＤ光源が点灯しているように外観させることができる光源点灯装置を提供することにある。 An object of the present invention is to solve the above-mentioned problems of the prior art, and even when the power supply to the LED light source is reduced, the light source can be turned on as if the LED light source is turned on without using a booster. To provide the equipment.

前記目的を達成するために、本発明は、電源入力部（３１）と、灯火器（１０，７０）の内部に配設されると共に互いに直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）と、該ＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）に電力を供給する出力部（３３）とを有する光源点灯装置（３０）において、制御部（３５）の指令に応じてＬＥＤ光源の端子間を短絡させるスイッチング素子（Ｓ）を具備し、前記スイッチング素子（Ｓ）が、前記直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）のうちの少なくとも２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）に並列接続されており、前記制御部（３５）は、前記出力部（３３）から出力される電流値（Ａ）が所定閾値を下回ると、前記スイッチング素子（Ｓ）のオンオフ状態を交互に切り替えることで前記少なくとも２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）を点滅制御する点に第１の特徴がある。 In order to achieve the above object, the present invention presents a plurality of LED light sources (L1 to L4, L11) arranged inside the power input unit (31) and the lamp (10, 70) and connected in series with each other. ~ L14, L21 to L24) and a control unit (35) in a light source lighting device (30) having an output unit (33) for supplying power to the LED light sources (L1 to L4, L11 to L14, L21 to L24). ) Is provided with a switching element (S) that short-circuits the terminals of the LED light source in response to the command of), and the switching element (S) is connected to the plurality of LED light sources (L1 to L4, L11 to L14, L21) in series. ~ L24), at least two LED light sources (L3, L4, L13, L14, L23, L24) are connected in parallel, and the control unit (35) is a current output from the output unit (33). When the value (A) falls below a predetermined threshold, the at least two LED light sources (L3, L4, L13, L14, L23, L24) are controlled to blink by alternately switching the on / off state of the switching element (S). Has the first feature.

また、エンジンの駆動信号（Ｐ）を検出するエンジン制御装置（３６）を具備し、前記制御部（３５）は、前記エンジン制御装置（３６）が前記駆動信号（Ｐ）を検出した場合に、前記点滅制御を点灯制御へ切り換える点に第２の特徴がある。 Further, an engine control device (36) for detecting an engine drive signal (P) is provided, and the control unit (35) receives the drive signal (P) when the engine control device (36) detects the drive signal (P). The second feature is that the blinking control is switched to the lighting control.

また、前記点滅制御される前記ＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）が偶数個とされ、前記灯火器（１０，７０）の左右対称の位置に配設される点に第３の特徴がある。 Further, the number of the LED light sources (L3, L4, L13, L14, L23, L24) whose blinking control is controlled is an even number, and the LED light sources (10, 70) are arranged at symmetrical positions. There are three features.

また、前記スイッチング素子（Ｓ）は、前記直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）のうちの下流側に位置する２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）に並列接続される点に第４の特徴がある。 Further, the switching element (S) is two LED light sources (L3, L4, L13) located on the downstream side of the plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) connected in series. , L14, L23, L24), the fourth feature is that they are connected in parallel.

また、前記閾値（Ｂ）が、平常値として設定される電流値の８０％以下である点に第５の特徴がある。 The fifth feature is that the threshold value (B) is 80% or less of the current value set as a normal value.

また、電源入力部（３１）と、灯火器（１０，７０）の内部に配設されると共に互いに直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）と、該ＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）に電力を供給する出力部（３３）とを有する光源点灯装置（３０）において、制御部（３５）の指令に応じてＬＥＤ光源の端子間を短絡させるスイッチング素子（Ｓ）と、エンジンの駆動信号（Ｐ）を検出するエンジン制御装置（３６）とを具備し、前記スイッチング素子（Ｓ）が、前記直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）のうちの少なくとも２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）に並列接続されており、前記制御部（３５）は、前記エンジン制御装置（３６）が前記駆動信号（Ｐ）を検出しない場合に、前記スイッチング素子（Ｓ）のオンオフ状態を交互に切り替えることで前記ＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）を点滅制御する点に第６の特徴がある。 Further, a power input unit (31), a plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) arranged inside the lamp (10, 70) and connected in series with each other, and the same. In the light source lighting device (30) having an output unit (33) for supplying power to the LED light sources (L1 to L4, L11 to L14, L21 to L24), the terminal of the LED light source is in response to a command from the control unit (35). A plurality of LED light sources (S) including a switching element (S) for short-circuiting between them and an engine control device (36) for detecting an engine drive signal (P), and the switching element (S) connected in series. It is connected in parallel to at least two LED light sources (L3, L4, L13, L14, L23, L24) of L1 to L4, L11 to L14, L21 to L24), and the control unit (35) is the engine. When the control device (36) does not detect the drive signal (P), the LED light sources (L3, L4, L13, L14, L23, L24) are switched by alternately switching the on / off state of the switching element (S). The sixth feature is that it controls blinking.

また、前記制御部（３５）は、前記点滅制御の実行中に前記エンジン制御装置（３６）からの前記駆動信号（Ｐ）を検出すると、前記ＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）の点滅制御を終了する点に第７の特徴がある。 Further, when the control unit (35) detects the drive signal (P) from the engine control device (36) during the execution of the blinking control, the LED light sources (L3, L4, L13, L14, L23, The seventh feature is that the blinking control of L24) is terminated.

また、前記灯火器（１０，７０）が、ロービーム発光部（ＬＡ）およびハイビーム発光部（ＨＡ）を有するヘッドライトであり、前記複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）が、左右対称形状とされる前記ロービーム発光部（ＬＡ）を構成する点に第８の特徴がある。 Further, the lamp (10, 70) is a headlight having a low beam light emitting unit (LA) and a high beam light emitting unit (HA), and the plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24). However, there is an eighth feature in that it constitutes the low beam light emitting unit (LA) having a symmetrical shape.

また、前記点滅制御されるＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）が、通常点灯する他のＬＥＤ光源（Ｌ１，Ｌ２，Ｌ１２，Ｌ２２）の車幅方向内側に配設される点に第９の特徴がある。 Further, the blinking controlled LED light sources (L3, L4, L13, L14, L23, L24) are arranged inside the other LED light sources (L1, L2, L12, L22) that are normally lit in the vehicle width direction. There is a ninth feature in the point.

第１の特徴によれば、電源入力部（３１）と、灯火器（１０，７０）の内部に配設されると共に互いに直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）と、該ＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）に電力を供給する出力部（３３）とを有する光源点灯装置（３０）において、制御部（３５）の指令に応じてＬＥＤ光源の端子間を短絡させるスイッチング素子（Ｓ）を具備し、前記スイッチング素子（Ｓ）が、前記直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）のうちの少なくとも２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）に並列接続されており、前記制御部（３５）は、前記出力部（３３）から出力される電流値（Ａ）が所定閾値を下回ると、前記スイッチング素子（Ｓ）のオンオフ状態を交互に切り替えることで前記少なくとも２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）を点滅制御するので、出力部から出力される電流値が低下して、直列接続されたすべてのＬＥＤ光源を発光させることができなくなった場合でも、少なくとも２つのＬＥＤ光源を互い違いのタイミングで点滅制御することで、直列接続されているすべてのＬＥＤ光源が発光しているように外観させることができる。これにより、発光範囲に欠けを生じさせることなく電流値の低下に対応することが可能となる。 According to the first feature, a plurality of LED light sources (L1 to L4, L11 to L14, L21) arranged inside the power input unit (31) and the lamp (10, 70) and connected in series with each other. In a light source lighting device (30) having an LED light source (L1 to L24) and an output unit (33) for supplying power to the LED light sources (L1 to L4, L11 to L14, L21 to L24), a command from the control unit (35) is given. A switching element (S) for short-circuiting the terminals of the LED light source is provided, and the switching element (S) is a plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) connected in series. It is connected in parallel to at least two of these LED light sources (L3, L4, L13, L14, L23, L24), and the control unit (35) is a current value (A) output from the output unit (33). Is less than a predetermined threshold value, the on / off state of the switching element (S) is alternately switched to blink control the at least two LED light sources (L3, L4, L13, L14, L23, L24) from the output unit. Even if the output current value drops and it becomes impossible to make all the LED light sources connected in series emit light, at least two LED light sources are connected in series by controlling blinking at alternate timings. It can be made to appear as if all LED light sources are emitting light. This makes it possible to cope with a decrease in the current value without causing a chip in the light emitting range.

第２の特徴によれば、エンジンの駆動信号（Ｐ）を検出するエンジン制御装置（３６）を具備し、前記制御部（３５）は、前記エンジン制御装置（３６）が前記駆動信号（Ｐ）を検出した場合に、前記点滅制御を点灯制御へ切り換えるので、エンジンが駆動している時は、通常点灯に切り換えることができる。 According to the second feature, the engine control device (36) for detecting the drive signal (P) of the engine is provided, and the control unit (35) is the drive signal (P) of the engine control device (36). When the above is detected, the blinking control is switched to the lighting control, so that the normal lighting can be switched when the engine is driving.

第３の特徴によれば、前記点滅制御される前記ＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）が偶数個とされ、前記灯火器（１０，７０）の左右対称の位置に配設されるので、点滅制御によって発光量が低下するＬＥＤ光源が左右対称に配設されることで、左右で異なる位置に配設される場合に比して、発光量が低下したことを目立たなくすることができる。 According to the third feature, the number of the LED light sources (L3, L4, L13, L14, L23, L24) whose blinking is controlled is an even number, and the LED light sources (10, 70) are arranged symmetrically. Since the LED light sources are symmetrically arranged so that the amount of light emitted is reduced by the blinking control, the decrease in the amount of light emitted is not noticeable as compared with the case where the LED light sources are arranged at different positions on the left and right. can do.

第４の特徴によれば、前記スイッチング素子（Ｓ）は、前記直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）のうちの下流側に位置する２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）に並列接続されるので、制御部ゲート電圧を、昇圧することなくｎ型ＦＥＴでスイッチング措置を構成することができる。 According to the fourth feature, the switching element (S) is two LED light sources located on the downstream side of the plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) connected in series. Since it is connected in parallel to (L3, L4, L13, L14, L23, L24), the switching measure can be configured by the n-type FET without boosting the control unit gate voltage.

第５の特徴によれば、前記閾値（Ｂ）が、平常値として設定される電流値の８０％以下であるので、すべてのＬＥＤ光源を点灯させることができない電流値まで低下する前に点滅制御を開始することが可能となる。 According to the fifth feature, since the threshold value (B) is 80% or less of the current value set as a normal value, blinking control is performed before all the LED light sources are reduced to a current value that cannot be turned on. Can be started.

第６の特徴によれば、電源入力部（３１）と、灯火器（１０，７０）の内部に配設されると共に互いに直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）と、該ＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）に電力を供給する出力部（３３）とを有する光源点灯装置（３０）において、制御部（３５）の指令に応じてＬＥＤ光源の端子間を短絡させるスイッチング素子（Ｓ）と、エンジンの駆動信号（Ｐ）を検出するエンジン制御装置（３６）とを具備し、前記スイッチング素子（Ｓ）が、前記直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）のうちの少なくとも２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）に並列接続されており、前記制御部（３５）は、前記エンジン制御装置（３６）が前記駆動信号（Ｐ）を検出しない場合に、前記スイッチング素子（Ｓ）のオンオフ状態を交互に切り替えることで前記ＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）を点滅制御するので、エンジンと同期回転する発電機が停止し、出力部に流れる電流が閾値を下回る可能性が高いと判断される場合に、所定のＬＥＤ光源を点滅制御することで直列接続されているすべてのＬＥＤ光源が発光しているように外観させることが可能となる。すなわち、エンスト時やアイドルストップ時など、ヘッドライトが点灯した状態でエンジンが停止した際には、速やかに点滅制御を開始することでＬＥＤ電源への電力供給が低下する可能性があるエンジン停止時において、昇圧回路を用いることなく、ＬＥＤ光源が点灯しているよう外観させることができる。 According to the sixth feature, a plurality of LED light sources (L1 to L4, L11 to L14, L21) arranged inside the power input unit (31) and the lamp (10, 70) and connected in series with each other. ~ L24) and a light source lighting device (30) having an output unit (33) for supplying power to the LED light sources (L1 to L4, L11 to L14, L21 to L24), in response to a command from the control unit (35). A switching element (S) for short-circuiting the terminals of the LED light source and an engine control device (36) for detecting an engine drive signal (P) are provided, and the switching elements (S) are connected in series. It is connected in parallel to at least two LED light sources (L3, L4, L13, L14, L23, L24) of the plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24), and is connected to the control unit (L3, L4, L13, L14, L23, L24). The 35) is the LED light source (L3, L4, L13, L14) by alternately switching the on / off state of the switching element (S) when the engine control device (36) does not detect the drive signal (P). , L23, L24) are controlled to blink, so when it is judged that the generator that rotates synchronously with the engine is stopped and the current flowing through the output unit is likely to fall below the threshold value, the predetermined LED light source is controlled to blink. This makes it possible to make all the LED light sources connected in series appear to be emitting light. That is, when the engine is stopped while the headlights are on, such as when the engine is stalled or when the engine is stopped, the power supply to the LED power supply may decrease by promptly starting the blinking control. In, the LED light source can be made to appear to be lit without using a booster circuit.

第７の特徴によれば、前記制御部（３５）は、前記点滅制御の実行中に前記エンジン制御装置（３６）からの前記駆動信号（Ｐ）を検出すると、前記ＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）の点滅制御を終了するので、エンジンが始動して発電機により十分な電流値が得られると推定される場合には、ＬＥＤ光源を速やかに通常点灯に戻すことが可能となる。 According to the seventh feature, when the control unit (35) detects the drive signal (P) from the engine control device (36) during the execution of the blinking control, the LED light source (L3, L4). Since the blinking control of L13, L14, L23, L24) is terminated, when it is estimated that the engine starts and a sufficient current value can be obtained by the generator, the LED light source can be quickly returned to normal lighting. It will be possible.

第８の特徴によれば、前記灯火器（１０，７０）が、ロービーム発光部（ＬＡ）およびハイビーム発光部（ＨＡ）を有するヘッドライトであり、前記複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）が、左右対称形状とされる前記ロービーム発光部（ＬＡ）を構成するので、ハイビーム発光部よりＬＥＤ光源の数が多く発光面積が大きくなることが多いロービーム発光部において、発光範囲に欠けが生じることを防ぐことが可能となる。 According to the eighth feature, the lamp (10, 70) is a headlight having a low beam light emitting unit (LA) and a high beam light emitting unit (HA), and the plurality of LED light sources (L1 to L4, L11 to 1 to 1). Since L14, L21 to L24) constitute the low beam light emitting unit (LA) having a symmetrical shape, the low beam light emitting unit has a larger number of LED light sources and often has a larger light emitting area than the high beam light emitting unit. It is possible to prevent the range from being chipped.

第９の特徴によれば、前記点滅制御されるＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）が、通常点灯する他のＬＥＤ光源（Ｌ１，Ｌ２，Ｌ１２，Ｌ２２）の車幅方向内側に配設されるので、車両の視認者が車両の大きさを把握する際の手助けとなる車幅方向外側のＬＥＤ光源の発光量を維持することで、車両の大きさが把握しにくくなることを防ぐことができる。また、車幅方向内側にハイビーム発光部を配置すると共にその左右にロービーム発光部を配置するヘッドライトにおいては、点滅制御されるロービーム用のＬＥＤ光源が、通常点灯するロービーム用ＬＥＤ光源とハイビーム用光源との間に配設されることで、発光量の低下を目立たなくすることが可能となる。さらに、直列接続されるＬＥＤ光源によるロービーム発光部を左右２系統で備えると共に、左右のロービーム発光部の間にハイビーム発光部を配設したヘッドライトにおいても、点滅制御されるＬＥＤ光源の発光量の低下を目立たなくすることが可能となる。 According to the ninth feature, the blinking controlled LED light source (L3, L4, L13, L14, L23, L24) is normally lit in the vehicle width direction of another LED light source (L1, L2, L12, L22). Since it is arranged inside, it becomes difficult to grasp the size of the vehicle by maintaining the amount of light emitted from the LED light source on the outside in the vehicle width direction, which helps the viewer of the vehicle to grasp the size of the vehicle. You can prevent that. Further, in the headlight in which the high beam light emitting part is arranged inside in the vehicle width direction and the low beam light emitting part is arranged on the left and right sides thereof, the low beam LED light source whose blinking control is controlled is the low beam LED light source and the high beam light source which are normally lit. By arranging it between and, it is possible to make the decrease in the amount of light emission inconspicuous. Further, even in a headlight in which two low beam light emitting parts by LED light sources connected in series are provided on the left and right and a high beam light emitting part is arranged between the left and right low beam light emitting parts, the amount of light emitted by the LED light source controlled to blink. It is possible to make the decrease inconspicuous.

本発明の一実施形態に係る光源点灯装置で点灯制御されるヘッドライトを有する自動二輪車の一部拡大正面図である。It is a partially enlarged front view of a motorcycle which has a headlight which is controlled by the light source lighting device which concerns on one Embodiment of this invention. ヘッドライトを構成するハウジングの正面図である。It is a front view of the housing which constitutes a headlight. リフレクタ部分の拡大図である。It is an enlarged view of the reflector part. 光源点灯装置の構成を示すブロック図である。It is a block diagram which shows the structure of the light source lighting device. 本発明の変形例に係る光源点灯装置で点灯制御されるヘッドライトを有する自動二輪車の一部拡大正面図である。It is a partially enlarged front view of a motorcycle which has a headlight which is controlled by the light source lighting device which concerns on the modification of this invention. 変形例に係るヘッドライトを構成するハウジングの正面図である。It is a front view of the housing which constitutes the headlight which concerns on a modification. 変形例に係るリフレクタ部分の拡大図である。It is an enlarged view of the reflector part which concerns on a modification. 変形例に係る光源点灯装置の構成を示すブロック図である。It is a block diagram which shows the structure of the light source lighting apparatus which concerns on a modification.

以下、図面を参照して本発明の好ましい実施の形態について詳細に説明する。図１は、本発明の一実施形態に係る光源点灯装置で点灯制御されるヘッドライト１０を有する自動二輪車１の一部拡大正面図である。自動二輪車１は、操向ハンドル３の後方下方に低床フロアが設けられたスクータ型車両である。前輪ＷＦを回転自在に軸支する左右一対のフロントフォーク７は、バックミラー２が取り付けられた操向ハンドル３によって操舵可能に構成される。操向ハンドル３の前方には、防風スクリーン４およびヘッドライト１０を支持するフロントカウル５が配設されている。車幅方向中央に配設されるヘッドライト１０は、左右対称形状とされている。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partially enlarged front view of a motorcycle 1 having a headlight 10 whose lighting is controlled by a light source lighting device according to an embodiment of the present invention. The motorcycle 1 is a scooter-type vehicle in which a low-floor floor is provided below the rear of the steering wheel 3. The pair of left and right front forks 7 that rotatably support the front wheel WF are configured to be steerable by a steering handle 3 to which a rearview mirror 2 is attached. A front cowl 5 that supports the windbreak screen 4 and the headlight 10 is arranged in front of the steering handle 3. The headlight 10 arranged at the center in the vehicle width direction has a symmetrical shape.

図２は、ヘッドライト１０を構成するハウジング１１の正面図である。ヘッドライト１０は、硬質樹脂等からなる一体式のハウジング１１に、ＬＥＤ光源の照射光を車体前方に反射するリフレクタ部分１４を収納し、一体式のアウタレンズ（不図示）で蓋をした構成とされる。リフレクタ部分１４には、ハイビーム発光部およびロービーム発光部が設けられる。ハウジング１１の車幅方向中央には、ハイビーム用ＬＥＤ光源Ｈ１，Ｈ２に対応してハイビーム発光部を構成するハイビーム用リフレクタ２０が配設されている。ハイビーム用リフレクタ２０の車幅方向左側には、ロービーム用ＬＥＤ光源としての第１ＬＥＤ光源Ｌ１および第３ＬＥＤ光源Ｌ３に対応して左側のロービーム発光部を構成する第１リフレクタ２１および第３リフレクタ２３が配設されている。また、ハイビーム用リフレクタ２０の車幅方向右側には、ロービーム用ＬＥＤ光源としての第２ＬＥＤ光源Ｌ２および第４ＬＥＤ光源Ｌ４に対応して右側のロービーム発光部を構成する第２リフレクタ２２および第４リフレクタ２４が配設されている。 FIG. 2 is a front view of the housing 11 constituting the headlight 10. The headlight 10 has a configuration in which a reflector portion 14 that reflects the irradiation light of the LED light source to the front of the vehicle body is housed in an integrated housing 11 made of a hard resin or the like, and is covered with an integrated outer lens (not shown). Ru. The reflector portion 14 is provided with a high beam light emitting unit and a low beam light emitting unit. A high beam reflector 20 that constitutes a high beam light emitting unit corresponding to the high beam LED light sources H1 and H2 is arranged in the center of the housing 11 in the vehicle width direction. On the left side of the high beam reflector 20 in the vehicle width direction, the first reflector 21 and the third reflector 23 that form the left low beam light emitting unit corresponding to the first LED light source L1 and the third LED light source L3 as the low beam LED light source are arranged. It is installed. Further, on the right side of the high beam reflector 20 in the vehicle width direction, the second reflector 22 and the fourth reflector 24 constituting the low beam light emitting unit on the right side corresponding to the second LED light source L2 and the fourth LED light source L4 as the low beam LED light source. Are arranged.

リフレクタ部分１４の上方には、上側ポジションライトとして機能する上側導光部材１２Ｌ，１２Ｒが左右一対で配設されており、リフレクタ部分１４の下方には、下側ポジションライトとして機能する下側導光部材１３Ｌ，１３Ｒが左右一対で配設されている。 Upper left and right light guide members 12L and 12R that function as upper position lights are arranged above the reflector portion 14, and below the reflector portion 14, lower light guides that function as lower position lights. Members 13L and 13R are arranged in pairs on the left and right.

図３は、リフレクタ部分１４の拡大図である。リフレクタ部分１４は、左右一対のロービーム発光部ＬＡと、車幅方向中央のハイビーム発光部ＨＡとからなる。ここで、ロービーム発光部ＬＡを構成する第１ＬＥＤ光源Ｌ１〜第４ＬＥＤ光源Ｌ４は、互いに電気的に直列接続されている。ＬＥＤ光源Ｌ１〜Ｌ４には、車載バッテリから電力が供給されるが、車載バッテリの劣化や発電機の性能低下によって供給電力が所定値を下回ると、直列接続されたＬＥＤ光源Ｌ１〜Ｌ４が同時にすべて消灯してしまう可能性がある。本発明では、このような供給電力の低下があった場合に、ＬＥＤ光源Ｌ１〜Ｌ４のうちの第３ＬＥＤ光源Ｌ３および第４ＬＥＤ光源Ｌ４を点滅制御することで、ＬＥＤ光源Ｌ１〜Ｌ４の点灯状態が維持されているように外観させることを可能とする。 FIG. 3 is an enlarged view of the reflector portion 14. The reflector portion 14 includes a pair of left and right low beam light emitting portions LA and a high beam light emitting portion HA at the center in the vehicle width direction. Here, the first LED light sources L1 to the fourth LED light sources L4 constituting the low beam light emitting unit LA are electrically connected in series with each other. Power is supplied to the LED light sources L1 to L4 from the in-vehicle battery, but when the supplied power falls below a predetermined value due to deterioration of the in-vehicle battery or deterioration of the performance of the generator, all the LED light sources L1 to L4 connected in series are simultaneously connected. It may turn off. In the present invention, when there is such a decrease in the power supply, the lighting state of the LED light sources L1 to L4 is changed by controlling the blinking of the third LED light source L3 and the fourth LED light source L4 among the LED light sources L1 to L4. Allows the appearance to be maintained.

この点滅制御は、第３ＬＥＤ光源Ｌ３および第４ＬＥＤ光源Ｌ４にそれぞれ接続されたスイッチング素子（図４参照）を、互い違いのタイミングとなるように交互にオンオフ制御することで、同時点灯するＬＥＤ光源を４つから３つに減らすものである。点滅制御の周期や周期毎の点灯時間は、肉眼で視認した際に発光量が低下するもののちらつきは確認されない値に設定される。 In this blinking control, the switching elements (see FIG. 4) connected to the third LED light source L3 and the fourth LED light source L4 are alternately turned on and off so as to be at alternate timings, so that the LED light sources that are turned on at the same time are controlled by 4. It is reduced from one to three. The blinking control cycle and the lighting time for each cycle are set to values at which the amount of light emitted decreases when visually recognized with the naked eye, but flicker is not confirmed.

本実施形態では、片側２つのロービーム用ＬＥＤ光源のうち、左右対称に位置する第３ＬＥＤ光源Ｌ３および第４ＬＥＤ光源Ｌ４を点滅制御するため、左右で異なる位置に配設される場合に比して、発光量が低下したことを目立たなくすることが可能となる。また、第３ＬＥＤ光源Ｌ３および第４ＬＥＤ光源Ｌ４は、それぞれ、第１ＬＥＤ光源Ｌ１および第２ＬＥＤ光源Ｌ２の車幅方向内側に位置するため、車両の視認者が車両の大きさを把握する際の手助けとなる車幅方向外側のＬＥＤ光源の発光量を維持することで、車両の大きさが把握しにくくなることを防ぐことができる。 In the present embodiment, of the two low beam LED light sources on one side, the third LED light source L3 and the fourth LED light source L4, which are symmetrically located, are controlled to blink, so that the left and right LED light sources are arranged at different positions. It is possible to make the decrease in the amount of light emission inconspicuous. Further, since the third LED light source L3 and the fourth LED light source L4 are located inside the first LED light source L1 and the second LED light source L2 in the vehicle width direction, respectively, it helps the viewer of the vehicle to grasp the size of the vehicle. By maintaining the amount of light emitted from the LED light source on the outer side in the vehicle width direction, it is possible to prevent the size of the vehicle from becoming difficult to grasp.

さらに、本実施形態では、点滅制御する第３ＬＥＤ光源Ｌ３および第４ＬＥＤ光源Ｌ４が、通常点灯されるロービーム用ＬＥＤ光源Ｌ１，Ｌ２とハイビーム用ＬＥＤ光源Ｈ１，Ｈ２との間に配設されることで、第３ＬＥＤ光源Ｌ３および第４ＬＥＤ光源Ｌ４の発光量が低下したことをより一層目立たなくすることが可能となる。 Further, in the present embodiment, the third LED light source L3 and the fourth LED light source L4 for blinking control are arranged between the normally lit low beam LED light sources L1 and L2 and the high beam LED light sources H1 and H2. , It is possible to make the decrease in the amount of light emitted from the third LED light source L3 and the fourth LED light source L4 even more inconspicuous.

図４は、光源点灯装置３０の構成を示すブロック図である。ロービーム用の第１ＬＥＤ光源Ｌ１〜第４ＬＥＤ光源Ｌ４は直列接続されており、端子間を短絡させるスイッチング素子Ｓは、その下流側に位置する第３ＬＥＤ光源Ｌ３および第４ＬＥＤ光源Ｌ４にそれぞれ並列接続されている。スイッチング素子Ｓのオンオフ状態はＬＥＤ制御部３５によって切り替え制御され、スイッチング素子ＳをオフにするとＬＥＤ光源Ｌ３，Ｌ４の端子間がそれぞれ短絡される。 FIG. 4 is a block diagram showing the configuration of the light source lighting device 30. The first LED light source L1 to the fourth LED light source L4 for the low beam are connected in series, and the switching element S for short-circuiting the terminals is connected in parallel to the third LED light source L3 and the fourth LED light source L4 located on the downstream side thereof, respectively. There is. The on / off state of the switching element S is switched and controlled by the LED control unit 35, and when the switching element S is turned off, the terminals of the LED light sources L3 and L4 are short-circuited.

スイッチング素子Ｓは、高速スイッチング制御を可能とするＮ型ＦＥＴとすることができる。ＬＥＤ光源に接続されたスイッチング素子Ｓをオンに切り替える際には、ソース電圧より高い電圧をゲートに印加する必要があり、直列接続されたＬＥＤ光源の最上流に位置する第１ＬＥＤ光源Ｌ１をオンするためには車載バッテリ３１より高い電圧を得るための昇圧装置が必要となるが、本実施形態では下流側の第３ＬＥＤ光源Ｌ３および第４ＬＥＤ光源Ｌ４にスイッチング素子を接続し、昇圧装置を不要としてコストの増加を防いでいる。 The switching element S can be an N-type FET that enables high-speed switching control. When switching on the switching element S connected to the LED light source, it is necessary to apply a voltage higher than the source voltage to the gate, and the first LED light source L1 located at the uppermost stream of the LED light sources connected in series is turned on. For this purpose, a booster for obtaining a voltage higher than that of the in-vehicle battery 31 is required, but in the present embodiment, a switching element is connected to the third LED light source L3 and the fourth LED light source L4 on the downstream side, and the booster is unnecessary and the cost is increased. Is prevented from increasing.

出力部３３は、電源入力部としての車載バッテリ３１から供給される電力を、直列接続されたＬＥＤ光源Ｌ１〜Ｌ４に供給する。出力部３３は、ＬＥＤ光源Ｌ１〜Ｌ４に供給する電流を、所定範囲内の電流値Ａとする定電流源を備え、電流値Ａは、ＬＥＤ制御部３５によって監視される。 The output unit 33 supplies the electric power supplied from the vehicle-mounted battery 31 as the power input unit to the LED light sources L1 to L4 connected in series. The output unit 33 includes a constant current source in which the current supplied to the LED light sources L1 to L4 is a current value A within a predetermined range, and the current value A is monitored by the LED control unit 35.

車載バッテリ３１と出力部３３との間には、出力部３３に供給する電圧上限値を設定するリミッタ３２が配設される。車載バッテリ３１は、エンジンと同期回転する不図示の発電機の発電電力によって充電される。ハイビーム用ＬＥＤ光源Ｈ１，Ｈ２に対しては、電流源３４を介して電力が供給される。 A limiter 32 for setting a voltage upper limit value supplied to the output unit 33 is arranged between the vehicle-mounted battery 31 and the output unit 33. The in-vehicle battery 31 is charged by the generated power of a generator (not shown) that rotates synchronously with the engine. Electric power is supplied to the high beam LED light sources H1 and H2 via the current source 34.

燃料噴射装置や点火装置を作動させてエンジンを駆動制御するエンジン制御装置（ＥＣＵ）３６は、エンジンのクランク軸と一体回転するパルサリング３８が回転してパルス発生器３７が出力するパルス信号を、エンジンの駆動信号Ｐとして検出する。 The engine control device (ECU) 36, which drives and controls the engine by operating a fuel injection device and an ignition device, outputs a pulse signal output by a pulse generator 37 by rotating a pulsaring 38 that rotates integrally with the crankshaft of the engine. It is detected as the drive signal P of.

ＬＥＤ制御部３５は、車載バッテリ３１の劣化や発電機の性能低下等により、出力部３３から供給される電流値Ａが所定閾値Ｂを下回ると、スイッチング素子Ｓのオンオフ状態を交互に切り替えることで第３ＬＥＤ光源Ｌ３および第４ＬＥＤ光源Ｌ４を点滅制御する。所定閾値Ｂは、４つのＬＥＤ光源Ｌ１〜Ｌ４が点灯不能となる電流値より大きな値、例えば、車載バッテリ３１や発電機が十分に機能している平常時の値の８０％以下に設定することができる。 When the current value A supplied from the output unit 33 falls below the predetermined threshold value B due to deterioration of the vehicle-mounted battery 31 or deterioration of the performance of the generator, the LED control unit 35 alternately switches the on / off state of the switching element S. The third LED light source L3 and the fourth LED light source L4 are controlled to blink. The predetermined threshold value B is set to a value larger than the current value at which the four LED light sources L1 to L4 cannot be turned on, for example, 80% or less of the normal value at which the in-vehicle battery 31 and the generator are fully functioning. Can be done.

また、ＬＥＤ制御部３５は、電流値Ａが所定閾値Ｂを下回っていなくても、パルス発生器３７からパルス信号が出力されない場合に、発電機が停止することで出力部３３に流れる電流が所定閾値Ｂを下回る可能性があると判断して、スイッチング素子Ｓによる点滅制御を開始することができる。すなわち、エンスト時やアイドルストップ時など、ヘッドライトが点灯した状態でエンジンが停止した際には、速やかに点滅制御を開始して、ＬＥＤ電源への電力供給が低下する可能性があるエンジン停止時において、昇圧回路を用いることなく、ＬＥＤ光源が点灯しているよう外観させることができる。そして、点滅制御中にエンジンが始動した場合は、発電機が駆動することにより十分な電力が得られると判断して、点滅制御を終了させることができる。 Further, even if the current value A does not fall below the predetermined threshold value B, the LED control unit 35 determines the current flowing through the output unit 33 by stopping the generator when the pulse signal is not output from the pulse generator 37. It is possible to determine that the threshold value B may be lower and start the blinking control by the switching element S. That is, when the engine is stopped while the headlights are on, such as when the engine is stalled or when the engine is stopped, the blinking control is promptly started and the power supply to the LED power supply may be reduced when the engine is stopped. In, the LED light source can be made to appear to be lit without using a booster circuit. Then, when the engine is started during the blinking control, it can be determined that sufficient electric power can be obtained by driving the generator, and the blinking control can be terminated.

図５は、本発明の変形例に係る光源点灯装置で点灯制御されるヘッドライト７０を有する自動二輪車５０の一部拡大正面図である。自動二輪車５０は、操向ハンドル５５の後方に燃料タンクが設けられたモータサイクル型車両である。前輪ＷＦを回転自在に軸支する左右一対のフロントフォーク６０は、操向ハンドル３によって操舵可能に構成される。操向ハンドル５５の前方には、バックミラー５３、防風スクリーン５１およびヘッドライト７０を支持するフロントカウル５２が配設されている。ヘッドライト７０には、左右一対の発光部のみを前方に露出させるカバー部材６２が取り付けられる。カバー部材６２の車幅方向外側には、車体側部を覆うサイドカウル５９から上方に延びる上側延出部５６が配設されている。 FIG. 5 is a partially enlarged front view of a motorcycle 50 having a headlight 70 whose lighting is controlled by the light source lighting device according to the modified example of the present invention. The motorcycle 50 is a motorcycle type vehicle in which a fuel tank is provided behind the steering wheel 55. The pair of left and right front forks 60 that rotatably support the front wheel WF are configured to be steerable by the steering handle 3. A rear-view mirror 53, a windbreak screen 51, and a front cowl 52 that supports the headlight 70 are arranged in front of the steering handle 55. A cover member 62 that exposes only a pair of left and right light emitting portions to the front is attached to the headlight 70. On the outer side of the cover member 62 in the vehicle width direction, an upper extending portion 56 extending upward from the side cowl 59 covering the vehicle body side portion is arranged.

図６は、ヘッドライト７０を構成するハウジング７１の正面図である。ヘッドライト７０は、硬質樹脂等からなる一体式のハウジング７１に、ＬＥＤ光源の照射光を車体前方に反射する左右一対のリフレクタ部分７５Ｌ，７５Ｒを収納し、一体式のアウタレンズ（不図示）で蓋をした構成とされる。リフレクタ部分７５Ｌ，７５Ｒには、それぞれ、ハイビーム発光部およびロービーム発光部が設けられる。左側のリフレクタ部分７５Ｌには、ハイビーム用ＬＥＤ光源Ｈ１１，Ｈ１２に対応してハイビーム発光部を構成するハイビーム用リフレクタ９１Ｌ，９２Ｌが配設されている。ハイビーム用リフレクタ９１Ｌ，９２Ｌの車幅方向左側には、ロービーム用のＬＥＤ光源Ｌ１１〜Ｌ１４に対応してロービーム発光部を構成するリフレクタ８２Ｌ〜８４Ｌが配設されている。一方、右側のリフレクタ部分７５Ｒには、ハイビーム用ＬＥＤ光源Ｈ２１，Ｈ２２に対応してハイビーム発光部を構成するハイビーム用リフレクタ９１Ｒ，９２Ｒが配設されている。ハイビーム用リフレクタ９１Ｒ，９２Ｒの車幅方向右側には、ロービーム用のＬＥＤ光源Ｌ２１〜Ｌ２４に対応してロービーム発光部を構成するリフレクタ８２Ｒ〜８４Ｒが配設されている。 FIG. 6 is a front view of the housing 71 constituting the headlight 70. The headlight 70 has a pair of left and right reflector portions 75L and 75R that reflect the irradiation light of the LED light source in the front of the vehicle body in an integrated housing 71 made of hard resin or the like, and is covered with an integrated outer lens (not shown). It is said that the configuration is as follows. The reflector portions 75L and 75R are provided with a high beam light emitting unit and a low beam light emitting unit, respectively. The reflector portion 75L on the left side is provided with high beam reflectors 91L and 92L that form a high beam light emitting portion corresponding to the high beam LED light sources H11 and H12. On the left side of the high beam reflectors 91L and 92L in the vehicle width direction, reflectors 82L to 84L that form a low beam light emitting unit corresponding to the low beam LED light sources L11 to L14 are arranged. On the other hand, the reflector portion 75R on the right side is provided with high beam reflectors 91R and 92R that form a high beam light emitting portion corresponding to the high beam LED light sources H21 and H22. Reflectors 82R to 84R that form a low beam light emitting unit corresponding to the low beam LED light sources L21 to L24 are arranged on the right side of the high beam reflectors 91R and 92R in the vehicle width direction.

図７は、リフレクタ部分７５Ｌ，７５Ｒの拡大図である。リフレクタ部分７５Ｌ，７５Ｒには、それぞれ、車幅方向内側のハイビーム発光部ＨＡと、ハイビーム発光部ＨＡの車幅方向外側に連なるロービーム発光部ＬＡとを有する。 FIG. 7 is an enlarged view of the reflector portions 75L and 75R. The reflector portions 75L and 75R each have a high beam light emitting unit HA inside in the vehicle width direction and a low beam light emitting unit LA connected to the outside in the vehicle width direction of the high beam light emitting unit HA.

本変形例では、左右のロービーム発光部ＬＡにおいて、ロービーム用の直列回路がそれぞれ独立して設けられている。具体的には、左側のロービーム発光部ＬＡを構成するＬＥＤ光源Ｌ１１〜Ｌ１４が互いに直列接続されており、右側のロービーム発光部ＬＡを構成するＬＥＤ光源Ｌ２１〜Ｌ２４が互いに直列接続されている。 In this modification, a series circuit for the low beam is independently provided in the left and right low beam light emitting units LA. Specifically, the LED light sources L11 to L14 constituting the low beam light emitting unit LA on the left side are connected in series with each other, and the LED light sources L21 to L24 constituting the low beam light emitting unit LA on the right side are connected in series with each other.

そして、供給電力が低下した際には、左側のロービーム発光部ＬＡにおいてＬＥＤ光源Ｌ１３，Ｌ１４を点滅制御すると共に、右側のロービーム発光部ＬＡにおいてＬＥＤ光源Ｌ２３，Ｌ２４を点滅制御する。これにより、左右対称に配設されるＬＥＤ光源において点滅制御を行うため、発光量が低下したことを目立たなくすることが可能となる。また、車両の視認者が車両の大きさを把握する際の手助けとなる車幅方向外側のＬＥＤ光源Ｌ１１，Ｌ１２，Ｌ２１，Ｌ２２の発光量を維持することで、車両の大きさが把握しにくくなることを防ぐことができる。さらに、点滅制御するＬＥＤ光源Ｌ１３，Ｌ１４，Ｌ２３、Ｌ２４が、通常点灯されるロービーム用ＬＥＤ光源とハイビーム用ＬＥＤ光源との間に配設されることで、発光量の低下をより一層目立たなくすることが可能となる。 When the power supply is reduced, the LED light sources L13 and L14 are controlled to blink in the low beam light emitting unit LA on the left side, and the LED light sources L23 and L24 are controlled to blink in the low beam light emitting unit LA on the right side. As a result, since the blinking control is performed in the LED light sources arranged symmetrically, it is possible to make the decrease in the amount of light emission inconspicuous. In addition, it is difficult to grasp the size of the vehicle by maintaining the amount of light emitted from the LED light sources L11, L12, L21, and L22 outside the vehicle width direction, which helps the viewer of the vehicle to grasp the size of the vehicle. It can be prevented from becoming. Further, the LED light sources L13, L14, L23, and L24 for blinking control are arranged between the normally lit low beam LED light source and the high beam LED light source, so that the decrease in the amount of light emitted becomes more inconspicuous. It becomes possible.

図８は、変形例に係る光源点灯装置３０ａの構成を示すブロック図である。図４に示す光源点灯装置３０との相違点は、ロービーム用ＬＥＤ光源およびハイビーム用ＬＥＤ光源がそれぞれ２系統設けられている点であり、図４と同一符号は同一または同等部分を示す。 FIG. 8 is a block diagram showing the configuration of the light source lighting device 30a according to the modified example. The difference from the light source lighting device 30 shown in FIG. 4 is that two systems of a low beam LED light source and two high beam LED light sources are provided, and the same reference numerals as those in FIG. 4 indicate the same or equivalent parts.

ロービーム用のＬＥＤ光源Ｌ１１〜Ｌ１４およびＬＥＤ光源Ｌ２１〜Ｌ２４は、それぞれ直列接続されており、端子間を短絡させるスイッチング素子Ｓは、その下流側に位置するＬ１３，Ｌ１４，Ｌ２３，Ｌ２４にそれぞれ並列接続されている。スイッチング素子Ｓのオンオフ状態はＬＥＤ制御部３５によって切り替え制御され、スイッチング素子ＳをオフにするとＬＥＤ光源Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４の端子間がそれぞれ短絡される。 The low beam LED light sources L11 to L14 and the LED light sources L21 to L24 are connected in series, respectively, and the switching element S for short-circuiting the terminals is connected in parallel to L13, L14, L23, and L24 located on the downstream side thereof. Has been done. The on / off state of the switching element S is switched and controlled by the LED control unit 35, and when the switching element S is turned off, the terminals of the LED light sources L13, L14, L23, and L24 are short-circuited.

出力部３３は、車載バッテリ３１から供給される電力を、直列接続されたＬＥＤ光源Ｌ１〜Ｌ４に供給する。出力部３３によってＬＥＤ光源Ｌ１１〜Ｌ１４およびＬＥＤ光源Ｌ２１〜Ｌ２４に供給される電流値Ａは、ＬＥＤ制御部３５によって監視される。ハイビーム用ＬＥＤ光源Ｈ１１，Ｈ１２およびＨ１３，１４に対しては、それぞれ、電流源３４を介して電力が供給される。 The output unit 33 supplies the electric power supplied from the vehicle-mounted battery 31 to the LED light sources L1 to L4 connected in series. The current value A supplied to the LED light sources L11 to L14 and the LED light sources L21 to L24 by the output unit 33 is monitored by the LED control unit 35. Power is supplied to the high beam LED light sources H11, H12, and H13, 14 via the current source 34, respectively.

この変形例においても、出力部３３から供給される電流値Ａが所定閾値Ｂを下回ったり、パルス発生器３７からパルス信号が出力されない場合に、スイッチング素子Ｓを駆動してＬＥＤ光源が点滅制御される。この点滅制御は、前記実施形態と同様に、各ＬＥＤ光源にそれぞれ接続されたスイッチング素子Ｓを互い違いのタイミングとなるように交互にオンオフ制御することで、同時点灯するＬＥＤ光源を４つから３つに減らすものである。この変形例では、単一のヘッドライト７０に計８つのロービーム用ＬＥＤ光源が含まれるが、直列接続される個数を片側４個として２系統の回路を設けることで、万一、断線等が発生した場合でも影響を最小限に抑えることができる。 Also in this modification, when the current value A supplied from the output unit 33 falls below the predetermined threshold value B or the pulse signal is not output from the pulse generator 37, the switching element S is driven to control the blinking of the LED light source. To. Similar to the above embodiment, this blinking control alternately turns on and off the switching elements S connected to each LED light source so as to have alternating timings, so that four to three LED light sources that light up at the same time are controlled. It is to reduce to. In this modification, a total of eight low-beam LED light sources are included in a single headlight 70, but by providing two circuits with four connected in series on each side, disconnection or the like may occur. Even if it does, the effect can be minimized.

なお、自動二輪車の形態、ヘッドライトの形状や構造、ハウジングやリフレクタの形状や配置、ＬＥＤ光源の数や配置、スイッチング素子の数や点滅制御するＬＥＤ光源の配置等は、上記実施形態に限られず、種々の変更が可能である。上記実施形態では、点滅制御するＬＥＤ光源の数を１系統あたり２つとして車幅方向左右の対象位置に配置したが、直列接続するＬＥＤ光源を３系統以上設けるほか、点滅制御するＬＥＤ光源の数を１系統あたり４つ以上の偶数個として２種の点滅タイミングで点滅制御したり、また、点滅制御するＬＥＤ光源の数を１系統あたり３つ以上としてシーケンシャルに点滅制御したりすることが可能である。本発明に係る光源点灯装置は、ヘッドライトのほか、テールライトやポジションライト等の種々の灯火器に適用することが可能である。 The form of the motorcycle, the shape and structure of the headlight, the shape and arrangement of the housing and the reflector, the number and arrangement of the LED light sources, the number of switching elements and the arrangement of the LED light sources for controlling blinking are not limited to the above embodiments. , Various changes are possible. In the above embodiment, the number of LED light sources for blinking control is set to two per system and arranged at the target positions on the left and right in the vehicle width direction. However, in addition to providing three or more LED light sources connected in series, the number of LED light sources for blinking control is provided. It is possible to control blinking at two types of blinking timing by setting an even number of 4 or more per system, and to sequentially control blinking by setting the number of LED light sources to be controlled to blinking to 3 or more per system. is there. The light source lighting device according to the present invention can be applied to various lamps such as tail lights and position lights in addition to headlights.

１…自動二輪車（車両）、１０，７０…ヘッドライト（灯火器）、３０，３０ａ…光源点灯装置、３１…車載バッテリ（電源入力部）、３３…出力部、３５…制御部、３６…エンジン制御装置（ＥＣＵ）、Ａ…電流値、Ｂ…所定閾値、Ｓ…スイッチング素子、Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４…ロービーム用ＬＥＤ光源、ＬＡ…ロービーム発光部、ＨＡ…ハイビーム発光部、Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４…点滅制御されるＬＥＤ光源、Ｌ１，Ｌ２，Ｌ１２，Ｌ２２…他のＬＥＤ光源 1 ... Motorcycle (vehicle), 10,70 ... Headlight (lighting device), 30, 30a ... Light source lighting device, 31 ... In-vehicle battery (power input unit), 33 ... Output unit, 35 ... Control unit, 36 ... Engine Control device (ECU), A ... current value, B ... predetermined threshold, S ... switching element, L1 to L4, L11 to L14, L21 to L24 ... low beam LED light source, LA ... low beam light emitting unit, HA ... high beam light emitting unit, L3, L4, L13, L14, L23, L24 ... LED light source whose blinking is controlled, L1, L2, L12, L22 ... Other LED light source

第９の特徴によれば、前記点滅制御されるＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）が、通常点灯する他のＬＥＤ光源（Ｌ１，Ｌ２，Ｌ１２，Ｌ２２）の車幅方向内側に配設されるので、車両の視認者が車両の大きさを把握する際の手助けとなる車幅方向外側のＬＥＤ光源の発光量を維持することで、車両の大きさが把握しにくくなることを防ぐことができる。また、車幅方向内側にハイビーム発光部を配置すると共にその左右にロービーム発光部を配置するヘッドライトにおいては、点滅制御されるロービーム用のＬＥＤ光源が、通常点灯するロービーム用ＬＥＤ光源とハイビーム用ＬＥＤ光源との間に配設されることで、発光量の低下を目立たなくすることが可能となる。さらに、直列接続されるＬＥＤ光源によるロービーム発光部を左右２系統で備えると共に、左右のロービーム発光部の間にハイビーム発光部を配設したヘッドライトにおいても、点滅制御されるＬＥＤ光源の発光量の低下を目立たなくすることが可能となる。
According to the ninth feature, the blinking controlled LED light source (L3, L4, L13, L14, L23, L24) is normally lit in the vehicle width direction of another LED light source (L1, L2, L12, L22). Since it is arranged inside, it becomes difficult to grasp the size of the vehicle by maintaining the amount of light emitted from the LED light source on the outside in the vehicle width direction, which helps the viewer of the vehicle to grasp the size of the vehicle. You can prevent that. In the headlight to arrange the low-beam emitting section on the left and right as well as arranging the high-beam emitting portion in the vehicle width direction inner side, LED light sources for a low beam to be blinking controlled, low-beam LED light source for normal lighting and high beam LED By arranging it between the light source and the light source, it is possible to make the decrease in the amount of light emission inconspicuous. Further, even in a headlight in which two low beam light emitting parts by LED light sources connected in series are provided on the left and right and a high beam light emitting part is arranged between the left and right low beam light emitting parts, the amount of light emitted by the LED light source controlled to blink. It is possible to make the decrease inconspicuous.

ロービーム用のＬＥＤ光源Ｌ１１〜Ｌ１４およびＬＥＤ光源Ｌ２１〜Ｌ２４は、それぞれ直列接続されており、端子間を短絡させるスイッチング素子Ｓは、その下流側に位置するＬＥＤ光源Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４にそれぞれ並列接続されている。スイッチング素子Ｓのオンオフ状態はＬＥＤ制御部３５によって切り替え制御され、スイッチング素子ＳをオフにするとＬＥＤ光源Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４の端子間がそれぞれ短絡される。
The low beam LED light sources L11 to L14 and the LED light sources L21 to L24 are connected in series, and the switching element S for short-circuiting the terminals is connected to the LED light sources L13, L14, L23, and L24 located on the downstream side thereof, respectively. It is connected in parallel. The on / off state of the switching element S is switched and controlled by the LED control unit 35, and when the switching element S is turned off, the terminals of the LED light sources L13, L14, L23, and L24 are short-circuited.

出力部３３は、車載バッテリ３１から供給される電力を、直列接続されたＬＥＤ光源Ｌ１〜Ｌ４に供給する。出力部３３によってＬＥＤ光源Ｌ１１〜Ｌ１４およびＬＥＤ光源Ｌ２１〜Ｌ２４に供給される電流値Ａは、ＬＥＤ制御部３５によって監視される。ハイビーム用ＬＥＤ光源Ｈ１１，Ｈ１２およびＨ１３，Ｈ１４に対しては、それぞれ、電流源３４を介して電力が供給される。
The output unit 33 supplies the electric power supplied from the vehicle-mounted battery 31 to the LED light sources L1 to L4 connected in series. The current value A supplied to the LED light sources L11 to L14 and the LED light sources L21 to L24 by the output unit 33 is monitored by the LED control unit 35. For high beam LED light source H11, H12 and H13, H 14, respectively, power is supplied via a current source 34.

Claims (9)

電源入力部（３１）と、灯火器（１０，７０）の内部に配設されると共に互いに直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）と、該ＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）に電力を供給する出力部（３３）とを有する光源点灯装置（３０）において、
制御部（３５）の指令に応じてＬＥＤ光源の端子間を短絡させるスイッチング素子（Ｓ）を具備し、
前記スイッチング素子（Ｓ）が、前記直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）のうちの少なくとも２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）に並列接続されており、
前記制御部（３５）は、前記出力部（３３）から出力される電流値（Ａ）が所定閾値を下回ると、前記スイッチング素子（Ｓ）のオンオフ状態を交互に切り替えることで前記少なくとも２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）を点滅制御することを特徴とする光源点灯装置。 A plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) arranged inside the power input unit (31) and the lamps (10, 70) and connected in series with each other, and the LED light sources. In the light source lighting device (30) having an output unit (33) for supplying electric power to (L1 to L4, L11 to L14, L21 to L24).
A switching element (S) for short-circuiting the terminals of the LED light source in response to a command from the control unit (35) is provided.
The switching element (S) is the at least two LED light sources (L3, L4, L13, L14, L23, L24) of the plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) connected in series. ) Is connected in parallel,
When the current value (A) output from the output unit (33) falls below a predetermined threshold value, the control unit (35) alternately switches the on / off state of the switching element (S) to perform the at least two LEDs. A light source lighting device characterized by blinking control of light sources (L3, L4, L13, L14, L23, L24). エンジンの駆動信号（Ｐ）を検出するエンジン制御装置（３６）を具備し、
前記制御部（３５）は、前記エンジン制御装置（３６）が前記駆動信号（Ｐ）を検出した場合に、前記点滅制御を点灯制御へ切り換えることを特徴とする請求項１に記載の光源点灯装置。 The engine control device (36) for detecting the drive signal (P) of the engine is provided.
The light source lighting device according to claim 1, wherein the control unit (35) switches the blinking control to lighting control when the engine control device (36) detects the drive signal (P). .. 前記点滅制御される前記ＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）が偶数個とされ、前記灯火器（１０，７０）の左右対称の位置に配設されることを特徴とする請求項１または２に記載の光源点灯装置。 The blinking controlled LED light sources (L3, L4, L13, L14, L23, L24) are an even number, and are arranged symmetrically with respect to the lamps (10, 70). The light source lighting device according to claim 1 or 2. 前記スイッチング素子（Ｓ）は、前記直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）のうちの下流側に位置する２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）に並列接続されることを特徴とする請求項３に記載の光源点灯装置。 The switching element (S) is two LED light sources (L3, L4, L13, L14) located on the downstream side of the plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) connected in series. , L23, L24). The light source lighting device according to claim 3, wherein the light source lighting device is connected in parallel. 前記閾値（Ｂ）が、平常値として設定される電流値の８０％以下であることを特徴とする請求項１ないし４のいずれかに記載の光源点灯装置。 The light source lighting device according to any one of claims 1 to 4, wherein the threshold value (B) is 80% or less of a current value set as a normal value. 電源入力部（３１）と、灯火器（１０，７０）の内部に配設されると共に互いに直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）と、該ＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）に電力を供給する出力部（３３）とを有する光源点灯装置（３０）において、
制御部（３５）の指令に応じてＬＥＤ光源の端子間を短絡させるスイッチング素子（Ｓ）と、
エンジンの駆動信号（Ｐ）を検出するエンジン制御装置（３６）とを具備し、
前記スイッチング素子（Ｓ）が、前記直列接続された複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）のうちの少なくとも２つのＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）に並列接続されており、
前記制御部（３５）は、前記エンジン制御装置（３６）が前記駆動信号（Ｐ）を検出しない場合に、前記スイッチング素子（Ｓ）のオンオフ状態を交互に切り替えることで前記ＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）を点滅制御することを特徴とする光源点灯装置。 A plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) arranged inside the power input unit (31) and the lamps (10, 70) and connected in series with each other, and the LED light sources. In the light source lighting device (30) having an output unit (33) for supplying electric power to (L1 to L4, L11 to L14, L21 to L24).
A switching element (S) that short-circuits the terminals of the LED light source in response to a command from the control unit (35), and
It is equipped with an engine control device (36) that detects an engine drive signal (P).
The switching element (S) is the at least two LED light sources (L3, L4, L13, L14, L23, L24) of the plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) connected in series. ) Is connected in parallel,
When the engine control device (36) does not detect the drive signal (P), the control unit (35) alternately switches the on / off state of the switching element (S), thereby causing the LED light source (L3, L4). , L13, L14, L23, L24) is a light source lighting device characterized by blinking control. 前記制御部（３５）は、前記点滅制御の実行中に前記エンジン制御装置（３６）からの前記駆動信号（Ｐ）を検出すると、前記ＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）の点滅制御を終了することを特徴とする請求項６に記載の光源点灯装置。 When the control unit (35) detects the drive signal (P) from the engine control device (36) during the execution of the blinking control, the LED light source (L3, L4, L13, L14, L23, L24) The light source lighting device according to claim 6, wherein the blinking control of the light source is terminated. 前記灯火器（１０，７０）が、ロービーム発光部（ＬＡ）およびハイビーム発光部（ＨＡ）を有するヘッドライトであり、
前記複数のＬＥＤ光源（Ｌ１〜Ｌ４，Ｌ１１〜Ｌ１４，Ｌ２１〜Ｌ２４）が、左右対称形状とされる前記ロービーム発光部（ＬＡ）を構成することを特徴とする請求項１ないし７のいずれかに記載の光源点灯装置。 The lamp (10, 70) is a headlight having a low beam light emitting unit (LA) and a high beam light emitting unit (HA).
One of claims 1 to 7, wherein the plurality of LED light sources (L1 to L4, L11 to L14, L21 to L24) form the low beam light emitting unit (LA) having a symmetrical shape. The light source lighting device described. 前記点滅制御されるＬＥＤ光源（Ｌ３，Ｌ４，Ｌ１３，Ｌ１４，Ｌ２３，Ｌ２４）が、通常点灯する他のＬＥＤ光源（Ｌ１，Ｌ２，Ｌ１２，Ｌ２２）の車幅方向内側に配設されることを特徴とする請求項８に記載の光源点灯装置。 The blinking controlled LED light sources (L3, L4, L13, L14, L23, L24) are arranged inside the other LED light sources (L1, L2, L12, L22) that normally light up in the vehicle width direction. The light source lighting device according to claim 8.
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