Patent ID: 6696777
Filing Date: 2004-02-24
Classification: F28F,G03B,H01J,H04N

Abstract:
A cooling structure of a projection tube characterized in that:a chamber in which a liquid coolant is filled is formed on the panel surface of the projection tube, a liquid coolant is present in the chamber, the chamber is formed by the panel surface, a lens which faces the panel surface in an opposed manner, and a metal envelope which radiates heat, a first seal member is disposed between the metal envelope and the panel surface, a second seal member is disposed between the metal envelope and the lens, a holder for pressing the lens in the direction toward the metal envelope is disposed in the periphery of the lens, the holder and the sustainer are fastened to each other by means of couplers so as to apply pressure to the first seal member and the second seal member, whereby the chamber is sealed without coupling the couplers with the metal envelope.