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AssigneeTrixell
InventorsDavid Blanchon, David Couder, Benoît Candiard
Estimating the term…
A method is provided for controlling a light-sensitive device, for example, a digital X-ray detector including an array of light-sensitive points. The light-sensitive device includes a column conductor, line conductors, and light-sensitive points. Each light-sensitive point is connected between the column conductor and one of the line conductors, and includes a light-sensitive element converting a photon flux into electrical charges, and a transistor transferring the electrical charges to the column conductor based on control of a signal received by the corresponding line conductor. The method depends on the presence of a capacitor for cross-coupling between the drain and source of each transistor in the off state. The capacitor provides a potential variation to the column conductor upon receiving photons. The method comprises comparing the potential variation with a threshold, and reading the light-sensitive points in the event that the result of the comparison is positive.
A method for controlling a photosensitive device comprising a column conductor (Y1-Y3), row conductors (X1-X3) and photosensitive points (Pp), each photosensitive point (Pp) being linked between the column conductor (Y1-Y3) and one of the row conductors (X1-X3), and comprising a photosensitive element (Dp) suitable for converting a photon stream into electrical charges, and a transistor (T) controlled by the corresponding row conductor (X1-X3), the transistors (T) being controlled in the off state during an acquisition phase in which the photon stream is converted into electrical charges, and being successively controlled in the on state during a reading phase so as to transfer, row by row, the electrical charges to the column conductor (Y1-Y3), each transistor (T) introducing, in the off state, a stray coupling capacitance (C) between the corresponding photosensitive element (Pp) and column conductor (Y1-Y3), the method comprising a step consisting in determining an electrical potential on the column conductor (Y1-Y3) at an instant (tn-2, tn-1, tn) when the transistors (T) are controlled in the off state.
Dependencies are inferred from the claim text.