会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明申请
    • LED DRIVER CIRCUIT, LIGHTING ARRANGEMENT AND DRIVING METHOD
    • US20180116015A1
    • 2018-04-26
    • US15560822
    • 2016-03-15
    • PHILIPS LIGHTING HOLDING B.V.
    • JIE FULIANG SHIXIAO SUNJIMMY JIANG
    • H05B33/08
    • H05B33/083H05B33/0815H05B33/0842Y02B20/383
    • A first LED driver circuit comprising: a first input interface (30) for receiving an AC power input and providing a first output, wherein said first output is adapted to be connected to a second LED driver circuit; a first LED driver (32) powered by the first output; a first shorting element (36) for shorting the first output; a first control arrangement (38) for controlling the first shorting element wherein the first control arrangement (38) is adapted to close the first shorting element (36) during only one subset of half cycles of the AC power input to short circuit the first LED driver (32) and to prevent the first LED driver (32) from being powered by the AC power input, when the second LED driver circuit is powered by the AC power input complementarily with respect to the unpowered first LED driver (32) and, open the first shorting element (36) during the other subset of half cycles to allow the AC power input to power the first LED driver (32), when the second LED driver circuit is not powered by the AC power input complementarily with respect to the first LED driver (32); wherein the half cycle is the positive amplitude duration or the negative amplitude duration of the AC power input This means two of the LED driver circuits may be used in series, each one is supplies by power or not complementarily based on only one subset of half cycles of the AC power input.
    • 7. 发明申请
    • AC-LED WITH HYBRID LED CHANNELS
    • US20200037409A1
    • 2020-01-30
    • US15735697
    • 2016-06-06
    • PHILIPS LIGHTING HOLDING B.V.
    • MARTINUS PETRUS JOSEPH PEETERSSHU XUJIE FUMALGORZATA PERZRÉMY CYRILLE BROERSMADRAGAN SEKULOVSKIRENÉ THEODORUS WEGH
    • H05B33/08H05B33/12H01L33/50
    • The invention provides a light emitting diode (LED) lighting system (1) comprising a string (ST) including a number of light emitting diode (LED) elements (10) functionally connected with an AC voltage source (20) configured to apply an input voltage (Vi) to said string (ST), wherein the string (ST) comprises a plurality of segments (S1, S2, S3, . . . ), with each segment (S1, S2, S3, . . . ) comprising at least one or more of said light emitting diode (LED) elements (10), wherein the light emitting diode (LED) lighting system (1) is configured to connect a first segment (S1) in the string (ST) between and driven by the input voltage (Vi) when said input voltage (Vi) is bigger than a first threshold, and to connect the first segment (S1) and a second segment (S2) in the string between and driven by the input voltage (Vi) when said input voltage (Vi) is bigger than a second threshold bigger than said first threshold, wherein each LED element (10) comprises a light emitting diode (100) configured to generate blue LED radiation (101), wherein said first segment (S1) comprises a second photoluminescent material comprising LED element (210), wherein the second photoluminescent material comprising LED element (210) comprises (a) light emitting diode (100) and (b) a second photoluminescent material (230) configured to convert at least part of said LED radiation (101) into second conversion radiation (231) in the visible, and wherein said second photoluminescent material (230) only has a decay time of the second conversion radiation (231) smaller than 1 ms, and said second segment (S2) comprise first photoluminescent material comprising LED elements (110) each comprising (a) light emitting diode (100) and (b) a first photoluminescent material (130) configured to convert at least part of said LED radiation (101) into first conversion radiation (131) in the visible, and wherein said first photoluminescent material (130) only has a decay time of the first conversion radiation (131) in the range of 1-500 ms.