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US 7,095,176 B2Granted
Miniature tubular gas discharge lamp and method of manufacture
OwnerJudd B. Lynninventor
Life of this patent
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Abstract
A tubular gas discharge lamp and a method of manufacturing are disclosed. The method includes providing a tubular ingot having an outer surface with a first outer diameter. The method further includes drawing the tubular ingot to form a tube. The tube has a wall with an outer surface. The outer surface has a second outer diameter less than the first outer diameter. The wall is substantially transmissive to ultraviolet light. The method further includes applying at least one coating on the outer surface of the tube. The at least one coating includes a phosphor material.
Claims17
A tubular lamp comprising:
- a tube having an outer surface and an inner region containing a gas, the tube substantially transmissive to ultraviolet light, the gas generating ultraviolet light in response to electrical excitation;
- at least one electrode on the outer surface of the tube, the at least one electrode capacitively coupled to the gas;
- a phosphor material on the outer surface of the tube, the phosphor material generating visible light in response to excitation by ultraviolet light from the gas;
- and
- a protective material on the outer surface of the tube, the protective material providing environmental protection and mechanical protection to the phosphor material.
2 more elements
Dependencies are inferred from the claim text.