DICHROIC DEVICE OF CATHODE RAY TUBE

PURPOSE: A dichroic device of a cathode ray tube is provided to lengthen a lifetime of the cathode ray tube by removing the remaining gas in an assembly process of the dichroic device. CONSTITUTION: A dichroic device is formed with a frame(32a) and a mask(34a). The frame is formed with a couple of reinforcing members(320a,320b) and a couple of support members(320c,320d). The mask(34a) is combined with the frame(32a) by a tensile force. The reinforcing members(320a,320b) are arranged according a predetermined interval. The reinforcing members(320a,320b) and the support members(320c,320d) are formed with one body. The reinforcing member(320a,320b) arranged between the support member(320c,320d). The first plates(320c-1,320d-1) are combined with the reinforcing members(320a,320b). The second plates(320c-2,320d-2) are combined with the mask(32b). A gas exhaust portion is formed by the reinforcing members(320a,320b).