Invention Grant
US08878199B2 White light emitting diode (LED) lighting device driven by pulse current
有权
白光发光二极管(LED)照明器件由脉冲电流驱动
- Patent Title: White light emitting diode (LED) lighting device driven by pulse current
- Patent Title (中): 白光发光二极管(LED)照明器件由脉冲电流驱动
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Application No.: US14107294Application Date: 2013-12-16
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Publication No.: US08878199B2Publication Date: 2014-11-04
- Inventor: Ming Zhang , Kun Zhao , Dong-ming Li
- Applicant: Sichuan Sunfor Light Co., Ltd.
- Applicant Address: CN Sichuan
- Assignee: Sichuan Sunfor Light Co., Ltd.
- Current Assignee: Sichuan Sunfor Light Co., Ltd.
- Current Assignee Address: CN Sichuan
- Agency: Andrews Kurth LLP
- Agent Michael X. Ye
- Priority: CN201010123249 20100312; CN201010206904 20100623
- Main IPC: H01L31/12
- IPC: H01L31/12 ; H01L33/00 ; C09K11/74 ; C09K11/58 ; C09K11/77 ; H01L33/50 ; H05B33/08 ; H05B33/12

Abstract:
A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %: 30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.
Public/Granted literature
- US20140131746A1 WHITE LIGHT EMITTING DIODE (LED) LIGHTING DEVICE DRIVEN BY PULSE CURRENT Public/Granted day:2014-05-15
Information query
IPC分类: