Color parallax-free camera and display
First Claim
Patent Images
1. A parallax-free teleconferencing display for providing images to a viewer, the display comprising:
- shutter means operating in one of a clear mode and a scattering mode, the shutter means having a surface for diffusing light impinging thereon when the shutter means operates in the diffusing mode;
means for illuminating the diffusing surface of the shutter means with light comprising a plurality of discrete colors;
means interposed between the shutter means and the illuminating means for modulating the intensity of the light from the illuminating means impinging on the diffuse surface to display color video images on the shutter means;
image sensing means for collecting images of the viewer, the image sensing means generating a video representation of the viewer image;
first synchronizing means connected to the shutter means and the illuminating means for controlling the shutter means to operate in the scattering mode and the illuminating means to illuminate the diffusing surface of the shutter means so that the video image is displayed on the shutter means during a first time interval; and
second synchronizing means for controlling the shutter means to operate in the clear mode during a second time interval so that viewer images are recorded by the image sensing means through the shutter means.
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Abstract
Improved image quality is realized in a parallax-free teleconferencing display by increasing the camera light budget, that is, by increasing the light available to the camera, while maintaining a common optic axis between the camera and the display screen. Light-attenuating devices, such as color filters, are repositioned out of the path of light entering the camera. In this manner, image quality is improved while color capability is maintained.
135 Citations
18 Claims
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1. A parallax-free teleconferencing display for providing images to a viewer, the display comprising:
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shutter means operating in one of a clear mode and a scattering mode, the shutter means having a surface for diffusing light impinging thereon when the shutter means operates in the diffusing mode; means for illuminating the diffusing surface of the shutter means with light comprising a plurality of discrete colors; means interposed between the shutter means and the illuminating means for modulating the intensity of the light from the illuminating means impinging on the diffuse surface to display color video images on the shutter means; image sensing means for collecting images of the viewer, the image sensing means generating a video representation of the viewer image; first synchronizing means connected to the shutter means and the illuminating means for controlling the shutter means to operate in the scattering mode and the illuminating means to illuminate the diffusing surface of the shutter means so that the video image is displayed on the shutter means during a first time interval; and second synchronizing means for controlling the shutter means to operate in the clear mode during a second time interval so that viewer images are recorded by the image sensing means through the shutter means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for displaying color data on a display screen including a diffusing means and collecting images of a viewer viewing the display screen, the method comprising the steps of:
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transmitting light comprising a plurality of discrete colors through a monochrome liquid crystal array to illuminate the diffusing means during a first interval of time; applying a voltage representative of the data to the monochrome liquid crystal array to modulate the intensity of the light transmitted through the monochrome liquid crystal array and thereby display data on the diffusing means; collecting images of the viewer with an image sensing means during a second interval of time, the image sensing means generating a video representation of the viewer image; controlling the diffusing means to operate in a scattering mode during the first interval of time; and controlling the diffusing means to operate in a clear mode during the second interval of time so that the images of the viewer are recordable by the image sensing means through the diffusing means. - View Dependent Claims (15, 16, 17, 18)
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Specification