Photoelectric converting apparatus
AssigneeCanon Kabushiki Kaisha
InventorToshio Kameshima
Life of this patent
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Abstract
A photoelectric converting apparatus of the present invention includes a photoelectric converting element, a resetting transistor in which a source is connected to the photoelectric converting element and a drain is connected to a resetting power source, a readout transistor in which a gate is connected to the photoelectric converting element and a drain is connected to a readout power source, a signal line connected to a source of the readout transistor, a selecting transistor connected between the readout power source or the signal line and the readout transistor, and a constant current source connected to the signal line.
Claims15
A photoelectric converting apparatus comprising:
- an insulating supporting substrate that comprises
- a pixel including a photoelectric converting element, a resetting transistor having a source and a drain, wherein one of the source and the drain is connected to said photoelectric converting element and the other of the source and the drain is connected to a resetting power source, a readout transistor having a source, a drain and a gate, wherein the gate is connected to said photoelectric converting element and one of the source and the drain of said readout transistor is electrically connected to a readout power source,
- a signal line connected electrically to the other of the source and the drain of said readout transistor, and
- a constant current source connected to said signal line, wherein the resetting transistor, the readout transistor, and the constant current source are formed from an amorphous silicon layer or a polysilicon layer;
- and
- a readout unit connected to said signal line, wherein the readout unit has an amplifier connected to the signal line, and
- wherein said constant current source is provided at a position on said insulating supporting substrate, spaced from said readout unit rather than said pixel, and is formed together with at least one of said resetting transistor and said readout transistor.
A photoelectric converting apparatus comprising:
- an insulating supporting substrate comprising
- a sensor array including a plurality of pixels arranged two dimensionally, each pixel including a photoelectric converting element, a resetting transistor having a source and a drain, wherein one of the source and the drain is connected to said photoelectric converting element and the other of the source and the drain is connected to a resetting power source, a readout transistor having a source, a drain and a gate, wherein the gate is connected to said photoelectric converting element and one of the source of said readout transistor and the drain of said readout transistor is electrically connected to a readout power source,
- a plurality of signal lines connected electrically and commonly to the others of the sources and the drains of said readout transistors, and
- a constant current source connected to said signal lines, wherein the resetting transistor, the readout transistor, and the constant current source are formed from an amorphous silicon layer or a polysilicon layer;
- and
- a readout unit connected to said signal lines, wherein the readout unit has an amplifier connected to the signal line, and
- wherein said constant current source is provided at a position on said insulating supporting substrate, spaced from said readout unit rather than said sensor array, and is formed together with at least one of said resetting transistors and said readout transistors.
Dependencies are inferred from the claim text.