Illumination field blending for use in subtitle projection systems
AssigneeInFocus Corporation
InventorsBrian D. Wichner, Mark Peterson
Life of this patent
Estimating the term…
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.
Claims6
A projection method comprising:
- projecting an image;
- and
- projecting a text box with text on top of the image through a light path modifier offset from an object plane defined by a relay lens, with the text box having diffused borders.
A system, comprising:
- an image projector;
- a text projector synchronized with the image projector, the text projector further comprises:
- a relay lens defining an object plane;
- a light path modifier positioned sufficiently offset from the object plane, and
- a display device displaying a projected image through the light path modifier and relay lens.
Dependencies are inferred from the claim text.