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light source

A light source and waveguide technology, applied in the field of light sources, can solve problems such as incompatibility

Inactive Publication Date: 2017-03-01
CERAVISION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not a problem for e.g. street lights, but makes this type of light unsuitable for many applications

Method used

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Embodiment Construction

[0071] Referring to the drawings, Figure 1 shows a generalized representation of the parent lamp 1 comprising an oscillator and amplifier source 2 of microwave energy, typically operating at 2.45 or 5.8 GHz or other frequencies within the ISM band. The source transmits microwaves via a matching circuit 3 to an antenna 4 which extends into a cavity 5 in a light-transmissive waveguide 6 . The light-transmissive waveguide is quartz and has a central cavity 7 that houses a bulb 8 . The bulb is a sealed quartz tube 9 and is filled with an inert gas and a microwave excitable material which radiates visible light when excited by microwaves. The bulb has a stem 10 received in a stem hole 11 extending from the central cavity. The waveguide is transparent and light from the bulb can exit the waveguide in any direction under the influence of any reflective surfaces. Microwaves cannot leave the waveguide, which is confined at its surface by a Faraday cage. Typically, a Faraday cage inc...

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Abstract

A lamp (1) comprises a microwave energy oscillator and an amplifier source (2) which usually work at a frequency of 2.45 or 5.8GHz or other frequencies within ISM (industrial scientific medical) frequency band. A light source transmits microwaves to an antenna (4) via a matching circuit (3), the antenna (4) extends into a cavity (5) in a light permeable waveguide (6) which is quartz and provided with a central cavity (7) holding a lamp bulb (8). The lamp bulb is a quartz sealing tube (9) and contains inert gas and filler of microwave incentive materials, and the microwave incentive materials radiate visible light when the microwave incentive materials are incented. The lamp bulb is provided with a rod portion (10) which extends from the central cavity and is arranged in a rod hole (11). The light permeable waveguide is transparent, and light from the lamp bulb can be emitted in any direction by being affected by any reflection surfaces. Microwaves are not away from the waveguide, the surface of the waveguide is limited by a Faraday cage. Usually, the Faraday cage comprises an ITO (indium tin oxide) coating layer (12) on the front surface of the waveguide, a light reflection coating layer (10) on the rear surface, and a metal wire mesh (14), wherein the light reflection coating layer (10) is generally silver and provided with a silicon oxide coating layer (13), and the metal wire mesh (14) contacts with the ITO coating layer and the light reflection coating layer, is grounded and extends around the lateral side of the waveguide between the front surface and the rear surface. The light can be collected and used via the metal wire mesh.

Description

[0001] This application is a divisional application of the Chinese patent application titled "Microwave Light Source with Solid Dielectric Waveguide", the filing date is May 16, 2011, and the application number is 200880131995.8. technical field [0002] The invention relates to a light source for a lamp driven by microwaves. Background technique [0003] It is known to stimulate a discharge in a light bulb to produce light. Typical examples are sodium discharge lamps and fluorescent tube lamps. The latter uses mercury vapor that produces ultraviolet radiation. In turn, this excites the phosphor to produce visible light. Such lamps are more efficient than tungsten filament lamps in lumens of light emitted per watt of electricity consumed. However, they still have the disadvantage of requiring electrodes within the lamp. Because they carry the current needed to discharge, they deteriorate and eventually fail. [0004] We have developed electrodeless bulb lamps as describ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J65/04
Inventor B·伯莱斯顿A·S·尼特
Owner CERAVISION LTD