Image sensor with corner cuts

A - Human Necessities – 61 – B

Patent

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Details

A61B 6/14 (2006.01)

Patent

CA 2612736

The sensor comprises a chip with corner cuts including a matrix (10) of horizontal lines and vertical columns of photosensitive elements, the matrix having a generally rectangular shape of horizontal width L and having four cut- out panels, the sensor comprising as many current or voltage reading blocks as the number of columns of the matrix, to read the image signals detected by the photosensitive elements. The invention is characterized in that the current or voltage reading blocks are arranged in a row (30,30') along a horizontal edge of matrix of width L and all housed within a vertical band whereof the length L1 is substantially less than the maximum length L of the matrix. There are two rows of current reading blocks superimposed with blocks distributed at the same pitch as the columns of pixels, or in a single row, with the reading blocks distributed with a pitch less than that of the columns of pixels. The invention is applicable to CMOS technology intraoral radiological sensors.

L'invention concerne les capteurs d'image utilisant une puce à coins coupés. Le capteur comporte une puce à coins coupés comportant une matrice (10) de lignes horizontales et colonnes verticales d'éléments photosensibles, la matrice ayant une forme généralement rectangulaire de largeur horizontale L et ayant quatre pans coupés, le capteur comportant autant de blocs de lecture de courant ou tension qu'il y a de colonnes de la matrice, pour lire les signaux d'image détectés par les éléments photosensibles, caractérisé en ce que les blocs de lecture de courant ou tension sont disposés en rangée (30, 30') le long d'un bord horizontal de la matrice de largeur L' et tous logés à l'intérieur d'une bande verticale dont la largeur L1 est sensiblement inférieure à la largeur maximale L de la matrice. Il y deux rangées de blocs de lecture de courant superposées avec des blocs répartis au même pas que les colonnes de pixels, ou bien une seule rangée, avec des blocs de lecture répartis avec un pas inférieur à celui des colonnes de pixels. Application aux capteurs radiologiques intraoraux, en technologie CMOS.

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