Patent ID: 9696615
Date: 2017-07-04
CPC Classifications: G02B,G03B,H04N

Claim:
1. A projector, comprising: a light source configured to provide an illumination beam and comprising a light emitting area in a rectangular shape; a light integration rod having a light incidence end and a light emission end opposite to each other, wherein the illumination beam is emitted into the light integration rod through the light incidence end and emitted out from the light integration rod through the light emission end, each of the light incidence end and the light emission end is in a rectangular shape, the light incidence end has a first side and a second side, the light emission end has a third side and a fourth side, the first side and the fourth side are parallel in a first direction, the second side and the third side are parallel in a second direction, wherein the first side is longer than the second side, the third side is longer than the fourth side, the first side is longer than the fourth side, the third side is longer than the second side, and the third side is longer than the first side; a light valve configured to convert the illumination beam projected on the light valve into an image beam; and a projection lens disposed on a transmission path of the image beam, wherein a length of the light integration rod along the first direction is decreased from the first side to the fourth side, and a length of the light integration rod along the second direction is increased from the second side to the third side, so that a light-emission angle of the illumination beam on the third side is smaller than a light-emission angle of the illumination beam on the fourth side, wherein the light emitting area of the light source has a fifth side and a sixth side, and the fifth side is longer than the sixth side and the fifth side is along to the first direction, and the sixth side is along the second direction, the fifth side is parallel in the first direction, and the sixth side is parallel in the second direction, and the light valve comprises an active area, and the active area is in a rectangular shape and has a seventh side corresponding to the third side and a eighth side corresponding to the fourth side, and a length of the seventh side is longer than a length of the eighth side, wherein the fifth side of the light emitting area corresponds to the eighth side of the active area in the first direction and the sixth side of the light emitting area corresponds to the seventh side of the active area in the second direction.