Abstract: A display apparatus provided with display cells wherein LEDs are arranged in dot-like array within a case and molded by a mold portion within the case, and a unit portion accommodating therein a cell substrate on which the display cells are mounted. Further, there are provided ventilation holes formed so as to penetrate the display cells at prescribed positions in a direction from rear to front, a fan which is provided in an upper part of a rear surface of the unit portion can send cooling air into the unit portion and an opening portion formed at a bottom surface of the unit portion, thereby making it possible to discharge the cooling air sent by the fan to outside from the ventilation holes through the opening portion. Further, a penthouse unit is provided in front of the display cells and the cooling air discharged from the ventilation holes is caused to be returned to a side of the LEDs.

Abstract: An improved means for incorporating an electron gun and stem assembly into the neck of a cathode ray tube wherein the stem is engaged with a metal collar while providing a groove therebetween, a thermally insulating fusible adhesive having an initial melting point lower than that of the stem is introduced into the groove, an end portion of the neck of the cathode ray tube is inserted into the groove, and the entire assembly is bonded together by means of fusion of the thermally insulating adhesive.