Patent ID: 8058789
Filing Date: 2011-11-15
Classification: H01J

Abstract:
1. A light emitting device, comprising: a glass envelope with a front surface; a cathodoluminescent (CL) phosphor coating applied to the interior of the front surface, and having a conductive layer adjacent thereto; a conductive coating within the glass envelope and contacting the CL phosphor and at least part of the internal surface of the glass envelope; an electron gun assembly further comprising: a base assembly suitable for coupling with a standard lighting fixture; and a power supply coupled to receive power from the base assembly and wherein the power supply is configured to provide a voltage between the emissive surface of the cathode and the CL phosphor with the CL phosphor relatively positive to the emissive surface, and a voltage between the emissive surface of the cathode and the extraction grid with the extraction grid relatively positive to the emissive surface; and wherein the voltages provided by the power supply causes electrons to be emitted from the electron gun assembly towards the CL phosphor such that the CL phosphor luminesces and light is emitted through the front surface.