Television – Camera – system and detail – Solid-state image sensor
Patent
1995-02-16
1998-07-21
Garber, Wendy
Television
Camera, system and detail
Solid-state image sensor
348317, 348445, 257246, H04N 312
Patent
active
057841039
ABSTRACT:
It is known to adjust the width/height ratio (aspect ratio) in charge coupled imaging devices in that a number of columns may or may not be used on either side of the imaging matrix. It is possible in this manner, for example, to reduce the aspect ratio to 4/3 starting from a device with an aspect ratio of 16/9 corresponding to a widescreen TV. Practice has shown that this reduction in the width impairs the quality of the imaging device in the 4/3 mode. According to an aspect of the invention, an FT device with an aspect ratio of 4/3 is used and operated as a 4-phase CCD in the 4/3 mode. To obtain the 16/9 aspect ratio, the height of the device is reduced in that selected lines are not used. For this purpose, the sensor matrix is operated as a 3-phase CCD, whereby the number of lines in vertical direction is increased. The aspect ratio surprisingly becomes substantially equal to 16/9, while the width remains the same and the number of lines in the vertical direction is constant, in that the excess lines are not used as video information. To operate the sensor matrix A as a 3-phase as well as a 4-phase CCD, the electrodes are interconnected by clock lines in the manner of a 12-phase CCD.
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Brouwer Pieter P.
Centen Petrus G. M.
Pine Gregory E.
Stoldt Holger
Theuwissen Albert J. P.
Biren Steven R.
Garber Wendy
U.S. Philips Corporation
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