| 摘要 |
An electric lamp (10) comprises: a housing (12,14); a light emitting diode, LED, unit (22) mounted in the housing and having a pair of LED terminals (70); a pair of supply terminals (28) mounted on the housing; and electrical connections (26) connecting the supply terminals to the LED terminals. The lamp is such that, when the supply terminals are connected to a suitable supply of electricity, electricity is supplied to the LED via the electrical connections and the LED unit produces light which is projected from the housing. The housing has a heat-dissipating wall (34) against which the LED unit is disposed such that the LED unit can expand and contract substantially freely relative to the wall. The wall has holes (36) aligned with the LED terminals, and the electrical connections pass with clearance through the holes from the LED terminals to the supply terminals. The LED unit is therefore not substantially impeded in its expansion or contraction by the heat-sinking wall, or by the electrical connections to which it is connected. A flexible, thermally-conductive layer may be provided between and in contact with the LED unit and the heat-sinking wall to improve the heat transfer from the LED unit to the wall but still permit differential expansion and contraction of the LED unit and the wall. |
