Patent ID: 7837337
Filing Date: 2010-11-23
Classification: G03B

Abstract:
1. A projection apparatus, comprising: an illumination system, for generating an illumination light beam, wherein the illumination system comprises a color generation device; a projection module, for receiving the illumination light beam from the illumination system and projecting an image according to the illumination light beam; and at least a filter, disposed in the illumination system and located on a light path defined by the illumination light beam, the filter being located between the color generation device and the projection module, the filter comprising a first filtering part and a second filtering part, wherein a minimum wavelength of a wavelength range of transmitted light of the second filtering part is larger than a minimum wavelength of a wavelength range of transmitted light of the first filtering part, or a maximum wavelength of a wavelength range of transmitted light of the second filtering part is smaller than a maximum wavelength of a wavelength range of transmitted light of the first filtering part.