Back to results
US 6,504,311 B1Granted
Cold-cathode cathodoluminescent lamp
AssigneeSI Diamond Technology, Inc.
InventorsNalin Kumar, Christo P. Bojkov, Martin A. Kykta
Life of this patent
Estimating the term…
Abstract
A pulsed lamp is supplied wherein electrons are supplied from a substantially flat cold cathode having low effective field emission work function and are accelerated to excite light emission from a phosphor layer on a transparent anode plate. The emission site density of the cathode and emission current characteristics vs electric field are selected to provide high light output while requiring only small duty cycle pulses from a voltage generator.
Claims15
A cathodoluminescent lamp, comprising:
- an evacuated envelope comprising a light-transparent area;
- an anode in proximity to the light-transparent area;
- a layer of phosphor in proximity to the anode;
- a substantially flat cold cathode, the cathode comprising a substrate and a surface of low effective field emission work function with a resistive layer between the substrate and the surface of low effective field emission work function;
- and
- electrical connections to the anode and cathode.
3 more elements
A cathodoluminescent lamp assembly, comprising:
- an evacuated envelope comprising a light-transparent area;
- an anode in proximity to the light-transparent area;
- a layer of phosphor in proximity to the anode;
- a substantially flat cold cathode, the cathode comprising a substrate and a surface of low effective field emission work function;
- and
- means for supplying a high voltage between the anode and the cathode, wherein the means for supplying high voltage supplies high voltage pulses, the pulses having a duty cycle in the range from about 0.1 percent to about 5 percent.
3 more elements
Dependencies are inferred from the claim text.