High brightness projection TV system using one or more CRTs with

Details High brightness projection TV system using one or more CRTs with High brightness projection TV system using one or more CRTs with

1987-07-27

1988-07-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358231, 358237, 358250, 313474, 313478, H04N 931, H04N 574, H01J 2910, H01J 3100

Patent

active

047558687

ABSTRACT:
A multiple tube projection television system. At least two image generating cathode ray tubes are provided, having an image generating surface which is concave. The radius of curvature of the image generating tubes is selected to be between 1.2 and 2 times the image diagonal of each tube. Dichroic mirror means are provided to combine the images produced from each tube. A projection lens system is positioned at an optical distance from each tube which is substantially equal to the radius of curvature of the concave phosphor surface. The combination provides for an optimum amount of light to the entrance aperture of the projection lens system.

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patent: 4642695 (1987-02-01), Iwasaki
patent: 4651217 (1987-03-01), Yamazaki
patent: 4672458 (1987-06-01), McKechnie

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