失敗しない為の基礎知識、LED照明 の故障要因まる …

1 Japan LED Association Copyright JLEDS All Righ Reserved. 1 LED 2007 2004 LED LED 2014 6 10 1 LED Next Stage LED ( 3 ) 2 JLEDS (10 ) 3 4 JLEDS 5 LED LED LED 2006 7 2011 4 2013 12 10,000 LED 2015 2 2008 2 2013 12 5,400 2 Copyright JLEDS All Righ Reserved.

2 3 Copyright JLEDS All Righ Reserved. ( C) ( C) JC _ _ Tj 4 EIA/JEDEC

3 D51(Methodology_ for_the_Thermal_Measurement_of_Component _Packages) Single_ Semiconductor_Device) EIA/JESD51-1 Electrical_Method Electrical_Test_Metod LED 5 . VF (Static_Mode) ( 1A) VF VF TSP Temperature-Sensitive_Parameter ) ( 100uS) VF 6 time Tj VFStatic_Mode.

4 D namic_Mode VF ) VF m 10 mA VF1 ( ) I OFF VF3 ( ) M 7 VF1VF2VF3 time TjDynamic_Mode ( 8 Heating_Curve Cooling_Curve.

5 Dynamic_Mode JEDEC JESD51-1 9 R JX C R JX C Tc,Ts H C Rth R (Electrical Test_Method) TSP(Temerature- Sensitve_Parameter) TJ Jc 10 VF C VF V The_change_in_temperature_sensing voltage_due_to the applied_heating_ power_ to_the_device K C Constant_definining_ relationship_ between changes_in_Tj_and TSP c Junction_ _ H Junction_ _ C Jc H C W ( LED e C-real)

6 Jc H e C W P-N LED JEDEC JESD51-1 VF M LED LED A A 11 V M VF COB LED C C LED A A LED DUT _Device_Under_Test _LED VF K K K VF T-VF 12 Hi L VH L0 C V K TSP C V Hi L0 C VH L0 VF VF V (K-Factor)

7 C C C C 13 M M A 14 A M 15 C C M 0 C VF 0V V C H M VF VFREF H VF VF M VF VF VF FREF VF VF VF F c 16

8 17 (VF3-VF1) VF1 Heating Curve Cooling Curve VF ( VFB) H K M M K K K ( VFB C C C C C C c JC c JC C C 18)

9 LED 19 5 4 3 1 2 20 Rth5 me j-c Rthj-a A Rth Rth Rth Rth4 j-a Rth -a C j-a D Rth 1 5 1 2 3 4 5 j-c(Junction_to_Case)

10 = 1 2 3 5 Rthj-a A Rthj-a B Rthj-a C Rthj-a D 21 2 4 (Electic Over Stress) F VF 22 Ts 23