Double jacketed high intensity discharge lamp
AssigneeOsram Sylvania Inc.
InventorsWalter P. Lapatovich, Christopher Scott Nordahl
Life of this patent
Estimating the term…
Abstract
An electric discharge lamp includes a light transmissive inner jacket that defines a sealed inner chamber, a first material in the inner chamber that emits light when activated, and a light transmissive outer jacket around the inner jacket. The outer jacket defines a sealed outer chamber between the inner and outer jackets that contains a second fill material. The second fill material, when activated by heat from the inner chamber when the lamp is operating, converts ultraviolet (UV) and deep blue light emitted from the inner chamber to visible light, thereby increasing an amount of visible light transmitted through the outer jacket compared to an amount of visible light transmitted through the inner jacket.
Claims30
An electric discharge lamp comprising:
- an envelope having a first wall of a first wall material defining an enclosed first chamber including a first fill material;
- the first chamber being substantially surround by and sealed to a second wall of a second wall material defining an enclosed second chamber intermediate the first wall and the second wall, the second chamber including a second fill material;
- the first fill material being excitable to light emission of a first spectrum on the application of electric power, and the first wall material being light transmissive of at least a portion of the first spectrum;
- the second fill material having a gaseous state at least during lamp operation, and being excitable to light emission of a second spectrum on the application of energy from the first envelope, and being light transmissive of at least a portion of the first spectrum under operating conditions;
- and
- the second wall material being light transmissive of at least a portion of the first spectrum and of the second spectrum.
An electric discharge lamp, comprising:
- a double jacketed lamp envelope with a sealed inner chamber of a first light transmissive wall material containing a first fill material that emits light when activated by electric power, and a separately sealed outer chamber between said double jackets, said outer chamber containing a second fill material that converts at least a portion of the light emitted from said inner chamber that is outside the visible spectrum to at least some light in the visible spectrum, which is then emitted by the second fill material from said outer chamber.
An electric discharge lamp comprising:
- a light transmissive inner jacket of a first wall material that defines a sealed inner chamber;
- a first fill material in said inner chamber that emits light and heat when activated;
- a light transmissive outer jacket around a light transmissive portion of said inner jacket and that defines a sealed outer chamber between said inner jacket and said outer jacket, said outer jacket being in thermally transmissive contact with said inner jacket;
- and
- a second fill material in said outer chamber that, when vaporized by the heat from said inner chamber when the lamp is operating, converts at least a portion of ultraviolet (UV) light emitted from said inner chamber to at least some visible light, thereby increasing an amount of visible light transmitted through said outer jacket from an amount of visible light transmitted through said inner jacket.
A method of increasing an amount of visible light from lamp that has a light transmissive inner jacket that defines a sealed inner chamber containing a first fill material that emits light when energized, the method comprising the steps of:
- providing a light transmissive outer jacket around the inner jacket so as to define a sealed outer chamber between the inner jacket and the outer jacket;
- and
- providing a second fill material in the outer chamber that, when vaporized by heat from the inner chamber when the lamp is operating, converts at least a portion of ultraviolet (UV) light emitted from the inner chamber to at least some visible light, thereby increasing an amount of visible light transmitted through the outer jacket from an amount of visible light transmitted through the inner jacket.
Dependencies are inferred from the claim text.