DiamondInsideTM LED Speaker：Dr. James Sung (MIT) DLC LED Advantages︰

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Presentation transcript:

DiamondInsideTM LED Speaker：Dr. James Sung (MIT) DLC LED Advantages︰ Diamond–Like Carbon (DLC) is LED’s Best Friend DLC LED Advantages︰ Eliminate Hot Spots Lower Junction Temperature Radiate Heat Tolerate Overdrive Relieve Interface Stress Improve Reliability Minimize Light Decay Reduce Cost Speaker：Dr. James Sung (MIT)

The comparison with Cree, Nichia and DLC COB on light performance

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DLC Terminated Hot Spot of MQW

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DLC flip chip light module (Regular MCPCB) at 350mA 8 dies of DLC flip chip LED chips on regular MCPCB COB DLC LED chip Tmax: 59.61 0C T: <1 0C Regular LED chip Tmax: 76.98 0C T: ~6 0C 8 dies of regular flip chip LED chips on regular MCPCB COB www.ritedia.com

DLC flip chip light module (Regular MCPCB) at 700mA DLC LED chip Tmax: 102.74 0C T: <8 0C 8 dies of DLC flip chip LED chips on regular MCPCB COB Regular LED chip Tmax: 135.23 0C T: ~28 0C 8 dies of regular flip chip LED chips on regular MCPCB COB www.ritedia.com

8x45mil chip (350mA) on ceramic substrate (18x16mm) Regular LED chip Tmax: 68.51 0C T: ~2 0C (32 chips) DLC LED chip Tmax: 61.58 0C T: <1 0C (32 chips)

8x45mil chip (700mA) on ceramic substrate (18x16mm) Regular LED chip Tmax: 119.4 0C T: ~9 0C (32 chips) DLC LED chip Tmax: 106.93 0C T: 3~4 0C (32 chips)

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Thermal Conductivity Thermal Conductivity = Thermal Diffusivity ＊ Heat Capacity ＊ Specific Gravity Thermal Diffusivity ≒Sound Speed 　　　　Diamond = Mach 60 (18 Km/sec) Sound ≒ Phonon ≒ Lattice Vibration

The Thermal Mechanism of DLC to DLC LED Light Module

Relative Luminous Flux (%)

Thank you！