The wavelength conversion element is disposed on a transmission path of the laser beam, and a first region of the wavelength conversion element includes at least one first optical function region and at least one second optical function region. The laser light source is configured to emit a laser beam. The illumination system includes a laser light source and a wavelength conversion element. The illumination system is configured to output an illumination beam. In order to achieve one or a portion of or all of the objects or other objects, an embodiment of the invention provides a projection apparatus including an illumination system, a light valve and a projection lens. The invention is directed to a projection apparatus, which has good image quality.
Further, the information disclosed in the Background section does not mean that one or more problems to be resolved by one or more embodiments of the invention were acknowledged by a person of ordinary skill in the art. The information disclosed in this Background section is only for enhancement of understanding of the background of the described technology and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Other objects and advantages of the invention can be further illustrated by the technical features broadly embodied and described as follows.
However, at this timing, the light valve continues to receive light, and the oscillating micro lenses will reflect the light beam to an unexpected position, causing problems of color point shift, color coordinates, and contrast of the color screen, and that would make the quality of the image projected by the current projector be low. Therefore, a solution is to: at certain timings, dissipating heat by wind generated by oscillating the micro lenses on the light valve back and forth. The large amount of thermal energy will also seriously affect the performance and reliability of the light valve. Because the light valve inside the projector will receive the light beam from the high-power light-emitting element and convert it into an image beam. However, when the projector with high-brightness design operates, the operation process thereof generates a large amount of heat. High-power light-emitting devices are usually used in projectors to achieve high-brightness design. In the current projector market, the pursuit of high-brightness design has become a trend. The invention relates to a projection apparatus. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. This application claims the priority benefit of China application serial no.
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