Patent ID: 6456341
Filing Date: 2002-09-24
Classification: H01J,H04N

Abstract:
A CRT assembly of a projection TV system, comprising:a CRT for forming an image; a projection lens for magnifying and projecting the image formed by the CRT; a coupler installed between the CRT and the projection lens; a coolant receiving portion formed at the center of the coupler, having a front surface in contact with the projection lens forming a seal and a rear surface in contact with a front surface of the CRT forming a seal; a coolant injection hole formed to penetrate a side of the coolant receiving portion, through which coolant is filled in the coolant receiving portion; an oil cap to be inserted into the inside the coolant injection hole and capable of being deformed when the coolant expands and is compressed according to the change of pressure of the coolant in the coolant receiving portion; and an oil cap holder fixing the oil cap to the coolant receiving portion, said oil cap and said oil cap holder are positioned in spaced relationship to each other, an aperture being formed in said oil cap holder allowing air between said oil cap and said oil cap holder to escape when said oil cap expands towards said oil cap holder.