1. LIVES: LED LIV and Emission Spectrum Testing Solution W2 Laboratories 2010.12.30 WWW.W2LAB.COM WWW.W2LAB.COM

2. 2 Basic Configuration Hardware Source meter: Keithley 2400 or 2600 serial Spectrometer: Instrument Systems, Ocean Optics, or StellarNet Emission image capture: any TWAIN compatible camera Optional temperature monitor Optional switching box (multi cell reliability test) Software Voltage, current, and pulse sweep functions Panels for manual control and fully automated test script running User configurable parameters in UI and configuration files Scripting capability for testing with different configurations Color rendering calculations for CRI and the new NIST CQS Fast data plotting tool for multi-device comparisons SQL database for R&D analysis and production SPC System Custom design per customer requirements

3. 3 Measurement Capability DC Voltage Sweep Up or down sweep with different compliances for forward and reverse bias User defined test points DC Current Sweep LIV curve for up or down sweep LIV curve for arbitrary current list with emission spectrum and image captures LIV and spectrum for user defined test points Pulsed Current Sweep Synchronized current pulse generation and voltage & power measurements with Keithley 2602A dual channel source meter. User configurable pulse parameters (peak, width, and duty cycle) Spectrometer synchronization Spectrum Analysis Color quality calculations: CRI (color rendering index), widely used CQS (color quality scale), the latest NIST development One- or dual-peak Lorentzian fit for peaks and FWHMs

4. 4 Example – Manual and Test Panels

5. 5 Example – Script Panel

6. 6 Example – Data Review

7. 7 Who are we? Profile Founded in 2000 3 partners with PhD in physics, EE, and robotic engineering Other loosely associated engineering members Alliances with other engineering firms in the area MRATek,, SVOTek, OAI Capability Custom systems: testing, automation, burn-in, life test Hardware: custom electronic boards and testing fixtures Software and firmware System integration Industries served Photonics and optoelectronics Diode lasers, LED, solar photovoltaic, passive optic components Others: disk drive, MEMS, and display