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
【課題】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。【解決手段】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、LED光源の端子間を短絡させるスイッチング素子(S)を具備する。スイッチング素子(S)が、直列接続された複数のLED光源のうちの少なくとも2つのLED光源(L3,L4,L13,L14,L23,L24)に並列接続される。制御部(35)は、出力部(33)から出力される電流値(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LED光源を点滅制御する。【選択図】図3
LIGHT SOURCE LIGHTING DEVICE
光源点灯装置
2020-11-19
Patent
Electronic Resource
Japanese
IPC: | H05B ELECTRIC HEATING , Elektrische Heizung / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |
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