Resources Contact Us Home
Fluorescent lamp with second phosphor layer

Image Number 2 for United States Patent #4070598.

A fluorescent lamp having a phosphor layer for converting radiation at a first non-visible wavelength to radiation in the visible spectrum, includes a second phosphor layer for converting other non-visible radiation, having a deleterious effect (depreciation) on the first phosphor layer, to wavelengths in the region containing the first wavelength for subsequent conversion to visible light, thus increasing the brightness of the fluorescent lamp simultaneous with minimization of early depreciation of lamp brightness.

  Recently Added Patents
Thermoplastic fluoropolymer composition
Spark plug
Point-in-time copies in a cascade using maps and fdisks
Wearable display device
Blocky hydroxyethylcellulose, derivatives thereof, process of making and uses thereof
Hair care composition
Family of pain producing substances and methods to produce novel analgesic drugs
  Randomly Featured Patents
Plug connector
RNA-interference by single-stranded RNA molecules
High glycerin containing anti-microbial cleansers
Method for cutting sheet metal
Interspecific tree named `PLUMSWEET IX`
Collapsible dispensing tube having an anchored barrier member
Method of forming narrowly spaced flash memory contact openings and lithography masks
Urine collection funnel
Hair conditioning shampoo
Image processing apparatus, image processing method and computer readable recording medium for recording program for computer to execute the method