Light source for projection system
First Claim
Patent Images
1. A light source for projection system for used on a projector, comprising:
- a transparent housing;
an anode provided in said transparent housing;
a cathode provided in said transparent housing without contacting with said anode; and
a fluorescent powder layer coated on said anode;
whereby electrons at said cathode are driven by an electric field between said cathode and said anode to stimulate said fluorescent powder layer to emit light.
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Accused Products
Abstract
A light source for projection system is installed on a projector and employs the field emission property between a cathode and an anode to stimulate a fluorescent powder layer for the same to emit light. The projection light source has sufficient brightness without the problems of producing high amount of heat and short service life. The high brightness of the light source enhances the quality of images projected by the projector and largely increases the economic effects of the projector.
10 Citations
28 Claims
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1. A light source for projection system for used on a projector, comprising:
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a transparent housing;
an anode provided in said transparent housing;
a cathode provided in said transparent housing without contacting with said anode; and
a fluorescent powder layer coated on said anode;
whereby electrons at said cathode are driven by an electric field between said cathode and said anode to stimulate said fluorescent powder layer to emit light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A light source for projection system, comprising:
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A cup-shaped anode;
a cathode provided in said cup-shaped anode without contacting with said anode; and
a fluorescent powder layer provided on an inner surface of said cup-shaped anode;
whereby electrons at said cathode are driven by an electric field between said cathode and said anode to stimulate said fluorescent powder layer to emit light. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification