Patent ID: 8770759

Claim:
A projection display system, comprising: a glasses system, comprising at least one first liquid crystal shutter and at least one second liquid crystal shutter; a driving unit, electrically connected to the glasses system, wherein when the driving unit respectively applies a first driving voltage and a second driving voltage to the first liquid crystal shutter and the second liquid crystal shutter, the first liquid crystal shutter is switched from a light transmitting state to a light shielding state within a first switching time, and the second liquid crystal shutter is switched from the light shielding state to the light transmitting state within the first switching time, and after the first driving voltage and the second driving voltage respectively applied on the first liquid crystal shutter and the second liquid crystal shutter are removed, the first liquid crystal shutter is switched from the light shielding state to the light transmitting state within a second switching time, and the second liquid crystal shutter is switched from the light transmitting state to the light shielding state within the second switching time; and a projection apparatus, comprising an illumination system and a color wheel, wherein the illumination system is capable of providing a light beam, and the color wheel is disposed in a transmission path of the light beam, and after the light beam passes through the color wheel, the light beam is transmitted to the glasses system, the color wheel has a compensation zone and a plurality of color zones, and when the color wheel is rotated, the compensation zone and the color zones sequentially pass through the light beam, the compensation zone has a first sub compensation zone, a second sub compensation zone, and a third sub compensation zone, wherein the second sub compensation zone is located between the first sub compensation zone and the third sub compensation zone, and a time for the first sub compensation zone passing through the light beam is substantially equal to a time for the third sub compensation zone passing through the light beam, wherein the first switching time is substantially equal to a time for the second sub compensation zone passing through the light beam, and the second switching time is substantially equal to a sum of time for the first sub compensation zone, the second sub compensation zone, and the third sub compensation zone sequentially passing through the light beam.