Spatial light modulator and projector

A technology of spatial light modulation and modulation unit, applied in projection devices, optics, optical components, etc., can solve the problem of image contrast reduction and achieve high contrast
CN1652015AInactive Publication Date: 2005-08-10SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SEIKO EPSON CORP
Publication Date
2005-08-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a spatial light modulator and projector with low cost and long service life for obtaining a high contrast image with a high light utilization efficiency. The spatial light modulator comprises a plurality of pixel opening areas (AP), a liquid crystal layer (209) for modulating and transmitting lights according to the image signal, and a plurality of micro lens components (203) capable of condensing the incident light and passing through the opening area (AP) on the incident side of the liquid crystal layer (209) and the opening area AP counterpart arrangement. Moreover, the micro lens components (203) have a plurality of focus positions (f1) and (f2) for each different roughly wheel shaped parts (R1) and (R2) corresponding to the optical axis as a center; the focus position (f2) of every wheel shaped part (R2) in a plurality of wheel shaped parts is positioned at a position closer to the micro lens component (203) based on the wheel shaped part (R2) and closed to one side of the optical axis (AX); every focus position of a plurality of focus positions (f1) and (f2) is closer to the ejaculating side compared with the liquid crystal layer (209).
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Description

technical field

[0001] The present invention relates to a spatial light modulation device, particularly a liquid crystal type spatial light modulation device, and a projector equipped with the same. Background technique

[0002] Home use of projectors is expanding in recent years. Therefore, it is expected that the spatial light modulation device of the projector is inexpensive, has a long life, and can obtain high-contrast images with high light utilization efficiency. As a representative example of the spatial light modulation device, for example, a liquid crystal panel is used. On the liquid crystal panel, various wirings such as data lines, scanning lines, and capacitor lines, and various electronic components such as thin film transistors and thin film diodes are provided in the image display area. Therefore, in each pixel, the area through which light for image display can be transmitted or reflected is limited by the presence of various wirings, electronic component...

Claims

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