Television – Stereoscopic – Stereoscopic display device
Patent
1995-01-20
1997-01-21
Chin, Tommy P.
Television
Stereoscopic
Stereoscopic display device
H04N 1304, H04N 718
Patent
active
055963633
DESCRIPTION:
BRIEF SUMMARY
This invention relates to apparatus for stereoscopically viewing screened images.
Stereoscopic viewing generally requires a pair of landscape format images to be orientated horizontally end to end in order to enable human eyes to see them side by side. Such an orientation is not necessary for photographic/television recording and reproduction, where the pair of landscape format images may have their longest sides adjoining and may be up ended by rotation through 90.degree.. As will be understood by those skilled in the art, a landscape format image is an image which is wider than it is high, the ratio of side lengths being 4:3 for current televisions. A portrait format image means an image which is higher than it is wide, such portrait format images being generally not accepted as a convenient shape for general photographic purposes.
According to the present invention, there is provided apparatus for stereoscopically viewing screened images, which apparatus comprises a housing, and optical means for the optical manipulation of a pair of landscape stereoscopic images between an orientation required for human viewing and an alternative orientation suitable for visual image recording or reproduction.
The screened pictures may be pictures on television screens, computer screens, projection screens, liquid crystal display screens, and any other suitable and appropriate viewing screens.
The optical means may be at least one mirror which just reflects light and a mirror which both reflects and transmits light. The mirror which both reflects and transmits light is preferably a half silvered mirror which reflects substantially 50% of the light and which transmits substantially 50% of the light.
The optical means may include polarizing filters and/or polarising spectacles.
In a first embodiment of the invention, the apparatus may be one which includes a television having a base, a top and sides, and in which the television is positioned on one of its sides, in which the mirror which both reflects and transmits light is positioned between upper and lower mirrors which just reflect light, in which a television screen of the television is positioned adjacent the lower mirror and the mirror which both reflects and transmits light, in which a first polarizing filter is positioned between the television screen and the lower mirror, and in which a second and oppositely polarizing filter is positioned between the television screen and the mirror which both reflects and transmits light.
In the first embodiment of the invention, the lower mirror is advantageously a hinged mirror which is hinged about an upper edge. Adjustment of the hinged mirror provides vertical alignment of the two images for a given size of television screen and viewing position. Horizontal adjustment and rotational adjustment are not necessary.
In a second embodiment of the invention, the apparatus is one which includes a television having a base, a top and sides, and in which the television is positioned on its base, in which the mirror which both reflects and transmits light is positioned above a lower mirror which just reflects light and is also positioned between the lower mirror which just reflects light and another mirror which just reflects light and which is horizontally in line with the mirror which both reflects and transmits light, in which a television screen of the television is positioned adjacent the lower mirror, in which optical barrier means separates the lower mirror into first and second parts, in which a first polarizing filter is positioned between the television screen and the first part of the lower mirror, and in which a second and oppositely polarizing filter is positioned between the television screen and the second part of the lower mirror.
In the second embodiment of the invention, the said other mirror is preferably hinged about an upper edge, in order to provide vertical adjustment of the two images for a given size of television screen and viewing position. As in the first embodiment of the invention, horizontal adjustment
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Chin Tommy P.
Tung Bryan S.
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