The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2013
Filed:
May. 14, 2011
Barry Preston, Mowbray, GB;
Andrew Simon Neate, Aylesbury, GB;
Barry Preston, Mowbray, GB;
Andrew Simon Neate, Aylesbury, GB;
Abstract
A lampcomprises an oscillator and amplifier sourceof microwave energy, typically operating at 2.45 or 5.8 GHz or other frequencies within an ISM band. The source passes the microwaves via a matching circuitto an antennaextending into a re -entrantin a lucent waveguideThis is of quartz and has a central cavityaccommodating a bulbThe bulb is a sealed tubeof quartz and contains a fill of noble gas and a microwave excitable material, which radiates visible light when excited by microwaves. The bulb has a stemreceived in a stem boreextending from the central cavity. The waveguide is transparent and light from the bulb can leave it in any direction, subject to any reflective surfaces. Microwaves cannot leave the waveguide, which is limited at its surfaces by a Faraday cage. Typically this comprises an ITO coatingon a front face of the waveguide, a light reflective coating, typically of silver with silicon monoxide coatingon a rear face and a wire mesh, which contacts both the ITO and light reflective coatings and is grounded, the wire mesh extending around sides of the waveguide between the front and back surfaces. Light can pass through the wire mesh for collection and use.