【摘 要】
:
One indoor led luminaire product of shortlifetime or high rate of lumen depreciation waseasily screened out with the newly publishedproduct-level accelerated test method CSA020during its validation.Ho
【机 构】
:
Beijing Research Center,Delft University of Technology,Beijing,China;State Key Laboratory of Solid S
论文部分内容阅读
One indoor led luminaire product of shortlifetime or high rate of lumen depreciation waseasily screened out with the newly publishedproduct-level accelerated test method CSA020during its validation.However,the cause forshort lifetime of that product was still open.Thispaper will investigate that failure mainly onthermal design,material properties,electronicssystem and even manufacturing process.
其他文献
Single LED package based on encapsulated leadframe provides a common electrical and thermal path with dramatic reduction of its thermal resistance.The specific LED packaging technology consists of a s
LED display is applied in advertising,transportation,information release,etc.Traditional LED display module includes LED board,driving PCB,plastic mask and back shell.The dot pitch of traditional LED
High efficiency white light-emitting diodes (LEDS) with superior spatial color homogeneity (SCH) have been investigated.In this paper,a new method of packaging of white pc-LEDs that employs a selfexpo
This paper investigated thermal behavior of three kinds of FC packages connected with AuSn,SAC305,and electrical conductive adhesive using 1-D thermal resistance circuit method,and finite element meth
0-10V dimming is popular in commercial buildings for energy management control.This paper introduces the 0-10V dimming system,circuit and operating principle.An integrated controller is presented whic
A novel bias supply scheme for IC controller is proposed in this paper.With this scheme,no auxiliary winding or linear voltage regulator is needed,and bias supply efficiency is improved.A Buck convert
Total internal reflection (TIR) effect leads to low light extraction efficiency (LEE) of the GaN LEDs on SiC and sapphire substrates.The LEE enhancements of the GaN based flip-chip light-emitting diod
With the evolution of LED manufacture industry,LED efficacy increases around 10% annually in the past years and now it has already been ready to replace most of the conventional light sources includin
Buck Power Factor Correction (PFC) converter has attracted a lot of research interests for its high efficiency at low input condition.The low output voltage also facilitates the design of the cascade
A new MOCVD platform,the Prismo D-BlueTM,was designed and manufactured at Advanced Micro- Fabrication Equipment Inc.(AMEC) for high-volume manufacturing of high-brightness Light Emitting Diodes (LEDs)