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US 4,904,054 AGranted
Projection apparatus for projection television receiver
AssigneePioneer Electronic Corporation
InventorYasunori Hiroshima
Life of this patent
Estimating the term…
Abstract
A coupler contains cooling liquid between the front face of a projection tube and a lens that forms the screen of a projection television receiver. The coupler has a multiplicity of large and small fins extending into the cooling liquid and parallel to the center line of the tube to dissipate heat. The fins are closely spaced from each other.
Claims5
A projection apparatus for use with a projection television receiver, comprising:
- a projection tube;
- a coupler having a front face provided with a window;
- a lens mounted in a window;
- packing sandwiched between the whole outer periphery of a front face of the projection tube and the coupler;
- cooling liquid that fills a confined space between the lens and the front face of the projection tube;
- and
- corrugation means formed on an inner surface of the coupler which defines one wall of the confined space.
4 more elements
Dependencies are inferred from the claim text.