Projection device and projection method

A technology of projection device and time-division method, which is applied in the direction of using projection device image reproducer, projection device, photography, etc., which can solve the problems of driving frequency influence and the inability to arbitrarily set the color wheel time period, etc.
CN101366275AInactive Publication Date: 2009-02-11CASIO COMPUTER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CASIO COMPUTER CO LTD
Publication Date
2009-02-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

A projection device comprises a light source, a color wheel which is inserted into an optical path of the light source and in which a plurality of color segments are formed along a peripheral direction of the color wheel. The color segments are configured to transmit a plurality of wavelength band components in the white light in a time division manner during a rotation of the color wheel. A light source driving unit alternating-current discharges the light source at a period shorter than a rotation period of the color wheel while reverses a polarity at a timing to switch the segment of the color wheel inserted into the optical path.
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Description

technical field

[0001] The present invention relates to a projection apparatus and a projection method capable of projecting a color image by composing an image of primary color components in a time-division manner using a white light source and a color wheel. Background technique

[0002] In a projection device of a Digital Light Display Processing (DLP) (registered trademark) system, light of each primary color component from a white light source is transmitted in a time-division manner via a component called a color wheel, which has at least a red (R ), green (G), and blue (B) primary color filters, and the primary color light is continuously reflected by the light modulation element in a time-division manner to display a monochromatic image. As a result, an optical image is constructed and projected, thereby projecting and displaying a color image.

[0003] In this type of projection apparatus, a high-pressure mercury-vapor lamp that performs arc discharge is used as a ...

Claims

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