LIGHTING DEVICE, AND LIGHTING APPARATUS

• Main Authors: NAKASHIRO AKIRA, SHIMIZU KUNIHIKO
• Format: Patent
• Language: English; Japanese
• Published: 25.10.2018
• Subjects: BLASTING; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; MECHANICAL ENGINEERING; PRINTED CIRCUITS; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; WEAPONS

PROBLEM TO BE SOLVED: To improve protection performance of a mounting component against static electricity.SOLUTION: A lighting device 100 includes a pair of input terminals for receiving input power from an external power supply AC, a power conversion circuit for converting the input power into desired DC power, a pair of output terminals for supplying the DC power to a light source, a dimming signal input circuit for receiving a dimming signal indicating a dimming level from an external device, a control circuit for controlling the power conversion circuit according to the dimming level indicated by the dimming signal, and adjusting the DC power to a value according to the dimming level, a printed circuit board 800 on which the pair of input terminals, the power conversion circuit, the pair of output terminals, the dimming signal input circuit and the control circuit are formed, and a metal plate 70 for holding the printed circuit board 800. A shortest distance L10 between the metal plate 70 and the dimming signal input circuit (lead 4901) on the printed circuit board 800, is shorter than a shortest distance between the dimming signal input circuit on the printed circuit board 800 and the control circuit.SELECTED DRAWING: Figure 2 【課題】静電気に対する搭載部品の保護性能の向上を図る。【解決手段】点灯装置１００は、外部電源ＡＣから入力電力を受け取る一対の入力端子と、入力電力を所望の直流電力に変換する電力変換回路と、直流電力を光源に供給する一対の出力端子と、調光レベルを指示する調光信号を外部装置から受け取る調光信号入力回路と、調光信号で指示される調光レベルに従って電力変換回路を制御して直流電力を調光レベルに応じた値に調整する制御回路と、一対の入力端子、電力変換回路、一対の出力端子、調光信号入力回路、及び制御回路を形成したプリント回路板８００と、プリント回路板８００を保持する金属板７０と、を備える。金属板７０とプリント回路板８００上における調光信号入力回路（リード４９０１）との間の最短距離Ｌ１０が、プリント回路板８００上における調光信号入力回路と制御回路との間の最短距離よりも短い。【選択図】図２