CRT deflection unit having a cooling fin
AssigneeU.S. Philips Corporation
InventorsMartinus H. E. Jansen, Arnoldus M. C. Kieboom
Life of this patent
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Abstract
A cathode ray tube includes a deflection unit (11) having a cooling fin (25) which is attached to the surface of a tapering surface on a yoke ring (23) by lugs (27). At least one of the lugs has a free end extending axially and outwardly in thermal contact with the tapering surface, and at least another of the lugs has a free end extending axially in an opposite direction and inwardly in thermal contact with the tapering surface.
Claims16
A cathode ray tube (1) comprising means (6) for generating at least one electron beam, a display screen (2), a deflection unit (11) having coils (21, 22) for deflecting the electron beam(s) across the display screen (2), and a yoke ring (23) which surrounds at least one of the coils (21, 22), said yoke ring (23) being provided with at least one cooling fin (25) for dissipating heat generated by the coils (21, 22), said cooling fin (25) thermally contacting the yoke ring by means of a plurality of lugs (27) which contact a surface of the yoke ring (23),
- characterized in that at least one of the lugs (27) of the cooling fin (25) is arranged so as to face the display screen (2) with a thermally contacting surface free end, and at least another of the lugs (27) is arranged so as to face away from the display screen (2) with a thermally contacting surface free end.
A cathode ray tube (1) comprising means (6) for generating at least one electron beam, a display screen (2), a deflection unit (11) having coils (21, 22) for deflecting the electron beam(s) across the display screen (2), and a yoke ring (23) which surrounds at least one of the coils (21, 22), said yoke ring (23) having an axially extending external surface tapering outwardly toward the display screen and being provided with at least one cooling fin (25) for dissipating heat generated by the coils (21, 22), said cooling fin (25) thermally contacting said surface by means of a plurality of lugs (27),
- characterized in that at least one of the lugs (27) is arranged with a free end extending axially toward the display screen (2) and outwardly to be in thermal contact with said surface, and at least another of the lugs (27) is arranged with a respective free end extending axially away from the display screen (2) and inwardly to be in thermal contact with said surface.
A cooling fin (25) for dissipating heat from an object having a tapering surface, comprising:
- a substantially planar circumferential portion, and
- a plurality of lugs (27) for contacting the tapering surface of the object,
- characterized in that at least one of the lugs (27) of the cooling fin (25) is arranged with a free end extending axially in a first direction and outwardly to be in thermal contact with said tapering surface, and at least another of the lugs (27) is arranged with a respective free end extending axially in a direction opposite to said first direction and inwardly to be in thermal contact with said surface.
Dependencies are inferred from the claim text.