Invention Grant
US07802888B2 Illumination field blending for use in subtitle projection systems 有权
用于字幕投影系统的照明场混合

Illumination field blending for use in subtitle projection systems
Abstract:
A projection system that projects a text or subtitle box onto an image minimizes the contrast between the text box and the image. A transition region surrounding the text box minimizes visual disruption to the image onto which the text box is projected. The positions of optical elements of a text projector enable the text box to gradually fade out. The text projector has a lamp that defines an object plane and a light path modifier. The light path modifier is offset from the object plane, toward the lamp to blend the borders of the text box into the image projected by an image projector.
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