To stably hold a sealed chamber of a liquid-cooled structure.
A bulb 4 is composed of a fluorescent screen panel part 1, a funnel part 2, and a neck part 3, a sealed chamber 11 formed of a fluorescent panel part 1 and a transparent member is provided on a front surface of the bulb 4, transparent liquid easy to generate convection is enclosed in the sealed chamber 11 to get in contact with a front surface of the fluorescent screen panel part 1, and a heat radiation plate 7 comprising heat conductive material partly in contact with the liquid is disposed on an outer circumferential part of the sealed chamber 11 to form a liquid-cooled projection cathode-ray tube. In this case, the heat radiation plate 7 is held through a seal member between the fluorescent screen panel 1 and the transparent member, a presser member is brought into contact with the funnel part 2 and the transparent member, the presser member brought into contact with the funnel part 2 is formed to have an opening part 14b of which inner edge part is frame-shaped, and the funnel part 2 and the transparent member are tightened to each other in a parallel direction to a tube axis, thereby the sealed chamber 11 is sealed and fixed.
IKEDA MISAO
TAMURA KATSUYOSHI
YAMAGUCHI TAKAAKI
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