EP0400985A2
Expired / Lapsed
EP
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Photoelectric converting apparatus
Assignee: Canon Inc
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Filing: 1990-05-30
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Granted: —
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Expires: 2010-05-30
Abstract
Abstract There is provided a photoelectric converting apparatus comprising: an accumulating unit to accumulate charges which were light excited; an amplifying unit to amplify charges of a control electrode; a switching device to connect the accumulating unit and the control electrode; a first reading unit to read out an output of the amplifying unit as a first signal when the switching device is set into a nonconductive state; a transferring unit to make the switching device conductive and to transfer the charges in the accumulating unit to the control electrode; a second reading unit to read out the output of the amplifying unit as a second signal after the charges were transferred; and a subtraction processing circuit to execute a subtracting process between the first and second signals.
Inventors
- 👤 c/o Canon Kabushiki Kaisha Hashimoto. Seiji
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:03
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/197; H04; H04N; H04N25/00; H04N25/60; H04N25/616; H04N25/67; H04N25/671; H04N25/65; H04N25/70; H04N25/76
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
A photoelectric converting apparatus comprising: accumulating means for accumulating charges which were light excited; amplifying means for amplifying charges of a control electrode; switching means for connecting the accumulating means and the control electrode; first reading means for reading out an output of the amplifying means as a first signal when the switching means is not conductive; transferring means for making the switching means conductive and for transferring the charges in the accumulating means to the control electrode; second reading means for reading out the output of the amplifying means as a second signal after the charges were transferred; and subtracting processing means for executing a subtracting process of the first and second signals.
Claim 2
Dependent Claim
114 words
A photoelectric converting apparatus comprising: accumulating means for accumulating charges which were light excited; amplifying means for amplifying charges of a control electrode; switching means for connecting the accumulating means and the control electrode; first reading means for reading out an output of the amplifying means as a first signal when the switching means is not conductive; transferring means for making the switching means conductive and for transferring the charges in the accumulating means to the control electrode; second reading means for reading out the output of the amplifying means as a second signal after the charges were transferred; and subtracting processing means for executing a subtracting process of the first and second signals.
Claim 3
Dependent Claim
147 words
A photoelectric converting apparatus comprising: accumulating means for accumulating charges which were light excited; amplifying means for amplifying charges of a control electrode; connecting means for connecting said accumulating means and said control electrode; resetting means which has a transfer device to connect the accumulating means and the control electrode and resets the control electrode before the charges in the accumulating means are transferred to the amplifying means; first reading means for reading out an output of the amplifying means as a first signal after the control electrode was reset; transferring means for making the transfer device conductive and for transferring the charges in the accumulating means to the control electrode; second reading means for reading out the output of the amplifying means as a second signal after the charges were transferred; and subtracting processing means for executing a subtracting process of the first and second signals.
Claim 4
Dependent Claim
147 words
A photoelectric converting apparatus comprising: accumulating means for accumulating charges which were light excited; amplifying means for amplifying charges of a control electrode; connecting means for connecting said accumulating means and said control electrode; resetting means which has a transfer device to connect the accumulating means and the control electrode and resets the control electrode before the charges in the accumulating means are transferred to the amplifying means; first reading means for reading out an output of the amplifying means as a first signal after the control electrode was reset; transferring means for making the transfer device conductive and for transferring the charges in the accumulating means to the control electrode; second reading means for reading out the output of the amplifying means as a second signal after the charges were transferred; and subtracting processing means for executing a subtracting process of the first and second signals.
Claim 5
Dependent Claim
54 words
An apparatus according to claim 1 or claim 2 wherein an accumulating region serving as the accumulating means and an amplifying region serving as the amplifying means are formed onto a substrate, a photoelectric converting region is laminated onto the amplifying region, and the photoelectric converting region and the amplifying region are electrically connected.
Claim 6
Dependent Claim
153 words
A photoelectric converting apparatus having a plurality of pixels in each of which accumulating means for accumulating light excited charges, amplifying means for amplifying charges of a control electrode, and a transfer device to connect the accumulating means and the control electrode are used as component elements, wherein said apparatus comprises: resetting means which is provided between the control electrodes of the pixels which are adjacent in a sub-scanning direction; first reading means for resetting the control electrodes by the resetting means and for reading out an output of the amplifying means as a first signal; transferring means for making the transfer device conductive and for transferring the charges in the accumulating means to the control electrode; second reading means for reading out the output of the amplifying means as a second signal after the charges were transferred; and subtracting processing means for executing a subtracting process of the first and second signals.
Claim 7
Dependent Claim
153 words
A photoelectric converting apparatus having a plurality of pixels in each of which accumulating means for accumulating light excited charges, amplifying means for amplifying charges of a control electrode, and a transfer device to connect the accumulating means and the control electrode are used as component elements, wherein said apparatus comprises: resetting means which is provided between the control electrodes of the pixels which are adjacent in a sub-scanning direction; first reading means for resetting the control electrodes by the resetting means and for reading out an output of the amplifying means as a first signal; transferring means for making the transfer device conductive and for transferring the charges in the accumulating means to the control electrode; second reading means for reading out the output of the amplifying means as a second signal after the charges were transferred; and subtracting processing means for executing a subtracting process of the first and second signals.
Claim 8
Independent Claim
18 words
An apparatus according to any one of claims 1 to 4 wherein the accumulating means is a photodiode.
Claim 9
Independent Claim
18 words
An apparatus according to any one of claims 1 to 5 wherein the amplifying means is a transistor.
Claim 10
Independent Claim
21 words
An apparatus according to any one of claims 1 to 6 wherein the first and second reading means include memory means.
Claim 11
Dependent Claim
13 words
An apparatus according to claim 7 wherein the memory means includes a capacitor.
Claim 12
Dependent Claim
130 words
A photoelectric conversion method or device in which photo-induced charges are stored, the stored charges affect the control region of an amplifying means, and an amplified signal is read out in accordance with the effect of the stored 'charges on the said control region, characterised in that the photo-induced charges are stored separated from the control region and subsequently they are electrically coupled to the control region so as to affect it, a first signal is read out from the amplifying means before the stored charges are electrically coupled to the control region, and a second signal is read out from the amplifying means after the stored charges are electrically coupled to the control region, the first signal providing a noise compensation signal for use in processing the second signal.
Claim 13
Dependent Claim
130 words
A photoelectric conversion method or device in which photo-induced charges are stored, the stored charges affect the control region of an amplifying means, and an amplified signal is read out in accordance with the effect of the stored 'charges on the said control region, characterised in that the photo-induced charges are stored separated from the control region and subsequently they are electrically coupled to the control region so as to affect it, a first signal is read out from the amplifying means before the stored charges are electrically coupled to the control region, and a second signal is read out from the amplifying means after the stored charges are electrically coupled to the control region, the first signal providing a noise compensation signal for use in processing the second signal.
References Cited (Backward Citations)
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