Image sensor with globally separate colour zones

H - Electricity – 01 – L

Patent

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Details

H01L 27/146 (2006.01)

Patent

CA 2590667

The invention concerns electronic colour image sensors and in particular sensors of very small dimensions enabling miniature photographic cameras or miniature cameras (capable of being incorporated in a portable telephone) to be produced. The sensor is provided with an optical system enabling the image of a scene to be observed to be projected on an array of photosensitive zones provided in a monolithic semiconductor chip integral with the optical system; said optical system includes several optical subassemblies (L1, L2, L3, L4) and the array of photosensitive zones is divided into at least two matrices (M1, M2, M3, M4) capable of being read independently, each optical subassembly being adapted to project onto a respective matrix the whole scene to be observed, two uniform filters of different colours (F1, F2, F3, F4) being arranged respectively above the different matrices to allow through to each matrix a single-colour light.

L'invention concerne les capteurs d'image électronique en couleur et notamment les capteurs de très petites dimensions permettant de réaliser des appareils photographiques ou caméras miniatures (incorporables par exemple à un téléphone portable). Le capteur est pourvu d'un système optique permettant de projeter l'image d'une scène à observer sur un réseau de zones photosensibles réalisées dans une même puce semiconductrice monolithique solidaire du système optique ; ce système optique comporte plusieurs sous-ensembles optiques (L1, L2, L3, L4) et le réseau de zones photosensibles est divisé en au moins deux matrices (M1, M2, M3, M4) susceptibles d'être lues indépendamment, chaque sous- ensemble optique étant adapté pour projeter sur une matrice respective l'ensemble de la scène à observer, deux filtres uniformes de couleurs différentes (F1, F2, F3, F4) étant disposés respectivement au-dessus des différentes matrices pour laisser passer vers chaque matrice une lumière d'une seule couleur.

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