Patent ID: 8172429

Claim:
A table lamp with a rotatable lamp casing comprising: a base; an arm extended from the base, the arm having one end connected to the base and the other end connected to an assembling portion; a luminant portion mounted on the assembling portion, the luminant portion having a seat mounted on the assembling portion and an lamp mounted on one side of the seat; a transparent casing rotatably mounted on the assembling portion and covering the luminant portion, the casing having multiple light-guiding sections disposed therein, each light-guiding section providing a specific illuminant mold; and a control system having a processing unit provided to be mounted on the assembling portion, a sensing unit electrically connected to the processing unit for sensing a position of the casing and adjusting an illuminant mold of the luminant portion, and a controller electrically connected to the processing unit for adjusting the illuminant mold of the luminant portion; wherein the casing is rotated relative to the luminant portion for changing the light-guiding section corresponded to the lamp such that the illuminant mold is changed.