Liquid cooled cathode ray tube apparatus for video...

Details Liquid cooled cathode ray tube apparatus for video... Liquid cooled cathode ray tube apparatus for video...

H - Electricity

01

J

313/15, 313/35,

H01J 31/00 (2006.01) H01J 7/24 (2006.01)

Patent

CA 1312906

ABSTRACT A liquid cooled cathode ray tube apparatus for a video projection system comprises a cathode ray tube for making a video image; a plastic projection lens disposed in front of the cathode ray tube for projecting the video image to a predetermined position; a radiator disposed between the cathode ray tube and the projection lens; and a transparent refrigerant fluid consisting essentially of a mixture of ethylene glycol, diethylene glycol and glycerine and contained in a liquid-tight space defined by the cathode ray tube, the projection lens and the radiator. Focussing and resolution performance of the projection lens are maintained without being affected by temperature change or temperature drift.

599942

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