High efficiency motion blur reduction
AssigneeThe Boeing Company
InventorsHarold R. Streid, Carl J. Vorst
Life of this patent
Estimating the term…
Abstract
A video projector, a shutter mechanism for a video projector, and a method for reducing image blur. A shutter can include regions that are 100% transmissive to light and regions that are more than 0% transmissive (but less than 100% transmissive). The more than 0% transmissive regions raise the perceived brightness of the image relative to a shutter with 0% transmissive regions, enabling the 100% transmissive regions to be smaller. The smaller 100% transmissive regions result in reduced image blur. The more than 0% transmissive regions can include a filter that filters out certain portions of the electromagnetic spectrum of the image to provide a perceived corrected image.
Claims19
A video projector for projecting images along a predefined path, the video projector comprising:
- a light source;
- an imaging circuit configured to receive light from the light source and to output images along the predefined path;
- and
- a single shutter disposed in the predefined path, the shutter comprising a first region and a second region that are at least partially transmissive of visible light, wherein the second region is less transmissive than the first region,
- wherein the shutter is operable according to a repeating sequence such that the output images are projected through the shutter to maintain a predefined perceived luminance, and
- wherein, within the repeating sequence, the first region is positioned across an entirety of the predefined path and then the second region is positioned across the entirety of the predefined path.
A shutter for a video projector, the video projector comprising an imaging circuit configured to output images along a predefined path responsive to light received from a light source, the shutter comprising:
- a rotatable disk comprising a plurality of first regions and a plurality of second regions that are arranged around the rotatable disk in an alternating pattern, wherein the first regions and the second regions are at least partially transmissive of visible light, wherein the first regions are more transmissive than the second regions,
- wherein, when the rotatable disk is disposed with a predefined arrangement relative to the imaging circuit, rotation of the rotatable disk causes the output images to be projected through the rotatable disk to maintain a predefined perceived luminance, and
- wherein, during the rotation of the rotatable disk, each of the plurality of first regions and each of the plurality of second regions are positioned across an entirety of the predefined path for a respective period.
A method for projecting a digital video image comprising a sequence of digital images and defining a brightness level for visible light of the digital video image, the method comprising:
- displaying each digital image of the sequence for a respective predefined time interval, wherein each predefined time interval is divided into a first portion and a second portion;
- during the first portion of the respective predefined time interval for each digital image, transmitting 100% of the brightness level for the visible light;
- and
- during the second portion of the respective predefined time interval for each digital image, transmitting less than 100% and more than 0% of the brightness level for the visible light,
- wherein lengths of the first portion and the second portion are selected such that the digital video image is projected to maintain a predefined perceived luminance.
Dependencies are inferred from the claim text.