H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 3/15 (2006.01)
Patent
CA 2378444
The invention concerns a method for controlling a photosensitive device comprising at least a photosensitive point (P1 to P9) with a photodiode (Dp) connected to a switch element (Dc, T). The method consists in subjecting the photosensitive point to a cycle of successive images. Between a first image cycle and a second image cycle it consists in producing a maintenance phase (PHM) ending at the beginning of the second image cycle. During said maintenance phase PHM), whereof the duration is equal to several equivalent shortest possible time intervals (dt), the photosensitive point is exposed to an optical flash (FO) at the beginning of each time interval. Between the successive optical flashes, the photodiode is subjected to reverse polarisation. The junction zone between the photodiode and the switch element has substantially a similar potential (VA) at the end of each time interval (dt).
Procédé de commande d'un dispositif photosensible comprenant au moins un point photosensible (P1 à P9) avec une photodiode (Dp) reliée à un élément de commutation (Dc, T). Il consiste à soumettre le point photosensible à des cycles d'image successifs. Entre un premier cycle d'image et un second cycle d'image, il consiste à réaliser une phase de maintien (PHM) se terminant au début du second cycle d'image. Durant cette phase de maintien (PHM), dont la durée est égale à plusieurs intervalles de temps (dt) égaux aussi courts que possible, le point photosensible est exposé à un flash optique (FO) en début de chaque intervalle de temps. Entre les flashs optiques successifs, la photodiode est polarisée en inverse. La zone de jonction entre la photodiode et l'élément de commutation possède sensiblement un même potentiel (VA) à la fin de chaque intervalle de temps (dt).
Apard Paul
Atoyan Clement
Barnichon Christophe
Chaussat Christophe
Ducourant Thierry
Robic
Trixell S.a.s.
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