Speckle reduction method
First Claim
1. A projection apparatus comprising a light source for projecting an illumination light through an illumination optical system to a spatial light modulator (SLM) for modulating the illumination light for generating and transmitting an image projection light to an image projection surface through a projection optical system to display an image, the projection apparatus further comprising:
- an image process unit for receiving and analyzing an input image data; and
the image process unit applies a conversion process to a signal related to the input image data to generate different control patterns for a plurality of adjacent pixel elements included in the SLM for a predetermined period during at least one frame period to reproduce a gradation of the pixel whereby each of the plurality of adjacent pixel elements has a gradation of approximately a same level.
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Accused Products
Abstract
A projection apparatus comprising a light source for projecting an illumination light through an illumination optical system to a spatial light modulator (SLM) for modulating the illumination light for generating and transmitting an image projection light to an image projection surface through a projection optical system to display an image. The projection apparatus further includes an image process unit for receiving and analyzing an input image data; and the image process unit applies a conversion process to a signal related to the input image data to generate different control patterns for a plurality of adjacent pixel elements included in the SLM for a predetermined period during at least one frame period to reproduce a gradation of the pixel whereby each of the plurality of adjacent pixel elements has a gradation of approximately a same level.
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Citations
14 Claims
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1. A projection apparatus comprising a light source for projecting an illumination light through an illumination optical system to a spatial light modulator (SLM) for modulating the illumination light for generating and transmitting an image projection light to an image projection surface through a projection optical system to display an image, the projection apparatus further comprising:
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an image process unit for receiving and analyzing an input image data; and the image process unit applies a conversion process to a signal related to the input image data to generate different control patterns for a plurality of adjacent pixel elements included in the SLM for a predetermined period during at least one frame period to reproduce a gradation of the pixel whereby each of the plurality of adjacent pixel elements has a gradation of approximately a same level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A projection apparatus comprises a laser light source for emitting an illumination light through an illumination optical system for projecting to a spatial light modulation (SLM) for generating and transmitting a modulated light through a projection optical system to project the modulated light from the SLM onto a projection surface, the projection apparatus further comprising:
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an image process unit for analyzing an input image; and the image process unit further performs a pseudo pixel conversion process for applying a conversion process to a signal related to the input image by temporally differentiating an algorithm of the conversion process for generating and displaying a gradation of a one pixel equivalent to the input image of a plurality of pixel elements included as part of the SLM. - View Dependent Claims (11, 12, 13, 14)
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Specification