Patent attributes
An LED lighting device comprise a lamp cap; a case, connected to the lamp cap and having a cavity; a power supply disposed in the cavity of the case; a heat exchange unit comprises a first heat spreader and a second heat spreader, the heat exchange unit has a folded state and an expanded state, and the heat exchange unit can be switched between the folded state and the expanded state, the heat exchange unit has a width dimension A in the folded state and has a width dimension B in the expanded state, the width dimension A of the heat exchange unit in the folded state is less than the width dimension B of the heat exchange unit in the expanded state, and a light emission unit, the light emission unit and the heat exchange unit are connected to form a thermal conduction path, the light emission unit and the power supply are electrically connected. The first spreader has first cooling fins, the second spreader has second cooling fins, in the folded state, the first cooling fins and the second cooling fins are at least partially overlapped in a first direction.
