LED LIGHTING DEVICE AND ILLUMINATING FIXTURE

• Main Authors: TAKEGUCHI NAOKI, KIDO HIROSHI, IDO SHIGERU
• Format: Patent
• Language: English; Japanese
• Published: 18.06.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

To provide an LED lighting device capable of suppressing a circuit cost and making it easy to measure an electric current which is not a rectangular wave.SOLUTION: An LED lighting device 30 comprises: a plurality of LED loads 21-24 having different luminescent colors; a power circuit 31 for supplying electric power to each of the plurality of LED loads 21-24; switching elements M3-M6 serially connected to each of the plurality of LED loads 21-24; and a control circuit 33 that lights the plurality of LED loads 21-24 one after another by turning ON the switching elements M3-M6 in a sequence. The control circuit 33 detects a characteristic value depending on the current value supplied by the power circuit 31 in at least one detection point, and converts the characteristic value into the current value flowing in the plurality of LED loads 21-24. The number of at least one detection point is smaller than the number of the plurality of LED loads 21-24.SELECTED DRAWING: Figure 1 【課題】回路コストを抑制し、かつ、矩形波でない電流の測定を容易にするＬＥＤ点灯装置を提供する。【解決手段】ＬＥＤ点灯装置３０は、異なる発光色を有する複数のＬＥＤ負荷２１〜２４と、複数のＬＥＤ負荷２１〜２４に電力を供給する電源回路３１と、複数のＬＥＤ負荷２１〜２４のそれぞれに直列接続されたスイッチング素子Ｍ３〜Ｍ６と、スイッチング素子Ｍ３〜Ｍ６を順番に導通させることにより複数のＬＥＤ負荷２１〜２４を順送り点灯させる制御回路３３とを備え、制御回路３３は、少なくとも１つの検出箇所において、電源回路３１から供給される電流量に依存する特性値を検出し、特性値を複数のＬＥＤ負荷２１〜２４を流れる電流値に換算し、少なくとも１つの検出箇所の個数は、複数のＬＥＤ負荷２１〜２４の数よりも少ない。【選択図】図１