LIGHTING DEVICE AND ILLUMINATION APPARATUS

To reduce stress applied to an element constituting a circuit, in a lighting device that turns on a light-emitting element by receiving power supply from a phase control type dimmer.SOLUTION: A lighting device includes: a power conversion circuit receiving power supply from a phase control type dimm...

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Bibliographic Details
Main Authors HARADA KAZUHIKO, WADA MANABU, NAKASHIRO AKIRA
Format Patent
LanguageEnglish
Japanese
Published 12.12.2019
Subjects
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Summary:To reduce stress applied to an element constituting a circuit, in a lighting device that turns on a light-emitting element by receiving power supply from a phase control type dimmer.SOLUTION: A lighting device includes: a power conversion circuit receiving power supply from a phase control type dimmer and supplying power to a light-emitting element; a constant current circuit flowing constant current through the light-emitting element; and a voltage feedback circuit to output, to the power conversion circuit, a control signal for controlling the output voltage of the power conversion circuit to a predetermined target value. The lighting device also includes a control section to temporarily increase the power consumption of the power conversion circuit when the dimming speed of the dimmer exceeds a predetermined threshold.SELECTED DRAWING: Figure 5 【課題】位相制御式の調光器から電力供給を受けて、発光素子を点灯させる点灯装置において、回路を構成する素子に与えるストレスを低減できるようにする。【解決手段】位相制御式の調光器から電力供給を受けて、電力を発光素子に供給する電力変換回路と、定電流を発光素子に流す定電流回路と、電力変換回路の出力電圧を所定目標値に制御するための制御信号を電力変換回路に出力する電圧フィードバック回路とを設ける。調光器の調光の速度が所定の閾値を超えた場合に、電力変換回路の電力消費を一時的に増加させる制御部を設ける。【選択図】図５
Bibliography:Application Number: JP20180104195