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Double stacked projection

A technology of projection and projector, applied in the field of dual stack projection

Inactive Publication Date: 2013-05-22
IMAX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to present a dual stack system which overcomes the difficulties and problems mentioned above and presents other advantages

Method used

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Embodiment Construction

[0175] The invention is described below in terms of exemplary configurations, but the invention is not intended to be considered limited to those exemplary configurations. For illustration, a grayscale projection system was used to describe the invention, but the described configuration can also be applied to each color plane of a three-color (e.g., RGB) color projection system and further used to use other color planes using standard color space conversion techniques. A projection system for space (eg, YPbPr). In addition, color correction circuitry for eg adapting tone adjustments, black and white points etc. may obviously be included between the source image signal and the projector. In addition, image projection systems may be used in several of the descriptions, and the configurations described may also operate on sequences of still images that make up a moving image. A monoscopic projection system is used in the description, but the invention is also applicable to a col...

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Abstract

A method for producing a first output image and a second output image for being projected by a first projector and a second projector, respectively, is disclosed. The method comprises: providing a source image comprising a plurality of pixels, each pixel having a source value, providing a threshold value and an inverted threshold value for each pixel of the plurality of pixels, and generating there from a temporary image comprising a temporary value for each pixel of the plurality of pixels. The method further comprises generating the first output image comprising a first output value for each pixel of the plurality of pixels, the first output value being generated from the temporary value and the source value for each pixel, and generating the second output image comprising a second output value for each pixel of the plurality of pixels, the second output value being generated from the temporary value.

Description

Background technique [0001] Modern ultra-high resolution 4K digital cinema projectors designed for normal sized cinema screens have the resolution ideal for very large screens, but lack the brightness these screens require. Dual-stack projectors are an effective way to increase brightness, but traditional dual-stacks have difficulty at such high resolutions because the tolerances in aligning the projected image become small and due to thermally induced effects in mechanical and optical parts. Movement and vibration from the audio system can be overwhelming during presentations. In other applications such as temporary projection setups, home theater, etc., alignment of dual stack projectors can be difficult to maintain even when working at much lower resolutions. [0002] "Dual stacking" of projectors (ie overlapping the images of two projectors projecting the same image) is a well known way to increase brightness. However, it is also known that conventional dual stacks requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31
CPCH04N9/3197H04N9/31H04N9/3126
Inventor S·S·艾弗森
Owner IMAX CORP