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Chandrashekhar Joshi LUXIM Corporation

Development of Long Life, Full Spectrum Light Source for Projection Display Presentation to SID May 21, 2007. Chandrashekhar Joshi LUXIM Corporation. No Electrodes Powered by RF More usable emitters possible Good lumens efficacy and CRI. LUXIM LIFI  : Long Life Projection Lamp.

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Chandrashekhar Joshi LUXIM Corporation

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  1. Development of Long Life, Full Spectrum Light Source for Projection DisplayPresentation to SID May 21, 2007 Chandrashekhar JoshiLUXIM Corporation

  2. No Electrodes Powered by RF More usable emitters possible Good lumens efficacy and CRI LUXIM LIFI: Long Life Projection Lamp LUXIM LIFI 4000 lamp LUXIM Corporation Proprietary and Confidential

  3. Quartz lamp embedded in a metallized dielectric resonator High Q cavity helps ignition Feedback probe samples resonant frequency Physical Principle: LUXIM LIFI Lamp Dielectric Resonator/Puck Quartz Bulb Feedback Probe Drive Probe Solid State Amplifier Ignition: Noble Gas break down/Hg evaporation Warm up: Vaporization of metal halide salts Operation: Emission of visible radiation LUXIM Corporation Proprietary and Confidential

  4. Cylindrical, high K dielectric puck reduces size Evanescent field coupling to lamp Small Lamp opening & metal coating reduces RF leakage LUXIM LIFI Lamp Alumina puck and embedded quartz bulb forming the LIFI 4000 lamp LUXIM Corporation Proprietary and Confidential

  5. Preamp/power amp combination gives up to 170 W Feedback probe provides input to preamp Single fan air cooling sufficient to remove heat RF Electronics for LIFI 4000 Lamp RF drive board for LIFI 4000 lamp LUXIM Corporation Proprietary and Confidential

  6. Continuous spectrum Luminous efficacy 76 lumens/watt 13,000 lumens @170 W 31% collected into etendue of 27 mm2sr LIFI 4000: Spectrum Comparison of LIFI 4000 spectrum with Hg:HID lamp spectrum LUXIM Corporation Proprietary and Confidential

  7. Lifetime testing done using 2 hr ON ½ hr OFF cycle After 4000 hours average lumen output 87% of initial but rate of change indicates stabilization LIFI 4000: Lifetime Test Best fit and extrapolation of lumen maintenance With hours of operation of LIFI 4000 lamp LUXIM Corporation Proprietary and Confidential

  8. Full brightness in less than 6 sec. Fast hot restrike Operates over wide temperature range from -5C to 55C LIFI 4000: Start-up Full brightness Warm up Ignition Start up of LIFI 4000 lamp LUXIM Corporation Proprietary and Confidential

  9. LIFI 4000 in volume production for projection display applications Factor 2× improvement allows application to front projectors and home theater CONCLUSIONS LUXIM LIFI 4000 Thanks to Y. Chang, M. Espiau, T. McGettigan, P. Lamond, G. Hollingsworth, R. Gilliard, A. Hafidi, M. DeVincentis, M. Duelli, A. Pradhan LUXIM Corporation Proprietary and Confidential

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