Patent ID: 8833973
Filing Date: 2014-09-16
Classification: G03B,H04N

Abstract:
1. A lamp position adjustment device used for shifting a wick of a lamp to a position corresponding to a center of an integration rod, the lamp position adjustment device comprising: a base plate; a supporting frame fixed on the base plate; a lamp holder, disposed in the supporting frame, pressing against the supporting frame, and holding the lamp; a first positioning mechanism disposed between the lamp holder and the supporting frame and between the lamp holder and the base plate to enable the lamp holder to move in a first direction relative to the supporting frame, wherein the first direction is substantially parallel with one side of a light incident surface of the integration rod, and the first positioning mechanism comprises: an adjustment screw passing through the base plate to press against the lamp holder; and a first spring disposed between the supporting frame and the lamp holder and positioned opposite the adjustment screw for exerting an elastic force in the first direction on the lamp holder, wherein the base plate has a first through hole, the adjustment screw is capable of passing through the first through hole to press against a corner of the lamp holder, and the adjustment screw and the first spring are respectively positioned at two ends of a diagonal line of the lamp holder; and a second positioning mechanism disposed between the lamp holder and the base plate to enable the lamp holder to rotate about an axis parallel to the first direction, wherein the second positioning mechanism comprises: a guide slot formed on the lamp holder; and a biased protrusion structure having a protrusion, wherein the protrusion is inserted into the guide slot to force the lamp holder to rotate about the axis parallel to the first direction when the biased protrusion structure rotates.