vailableJPH07129100A Title not availableJPH07129101A Title not availableWO1997048138A2May 28, 1997Dec 18, 1997Philips Electronics NvVisible light emitting devices including uv-light emitting diode and uv-excitable, visible light emitting phosphor, and method of producing such devicesWO1998039805A1Feb 23, 1998Sep 11, 1998Thomas JuestelWhite light-emitting diodeWO2000019546A1Sep 17, 1999Apr 6, 2000K