Image reading device
First Claim
Patent Images
1. An image reading device comprising:
- contact glass on which an original document is placed;
a frame surrounding a periphery of the contact glass;
a light emitting section configured to emit light toward the contact glass and the frame;
a mirror;
a sensor configured to receive first reflected light that has passed through the contact glass and then reflected off the mirror, and second reflected light that has been reflected off the frame and then reflected off the mirror, and detect a first received light amount resulting from the first reflected light and a second received light amount resulting from the second reflected light;
a control section configured to compare temporal variation of the first received light amount with temporal variation of the second received light amount;
a document cover mounted so as to be openable and closable relative to the contact glass;
a first switch configured to detect whether or not the document cover is being closed relative to the contact glass; and
a second switch configured to detect whether or not the document cover is closed relative to the contact glass,wherein the control section determines whether or not the temporal variation of the first received light amount indicates presence of the original document on the contact glass using the temporal variation of the second received light amount as a reference, andthe control section compares the temporal variation of the first received light amount with the temporal variation of the second received light amount after the first switch has detected that the document cover is being closed and before the second switch detects that the document cover is closed.
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Accused Products
Abstract
An image reading device includes contact glass, a frame, a light emitting section, a sensor, and a control section. An original document is placed on the contact glass. The flame surrounds the periphery of the contact glass. The light emitting section emits light toward the contact glass and the frame. The sensor detects a first received light amount resulting from first reflected light that has passed through the contact glass and a second received light amount resulting from second reflected light that has been reflected off the frame. The control section compares temporal variation of the first received light amount with temporal variation of the second received light amount. The control section determines whether or not the temporal variation of the first received light amount indicates presence of the original document on the contact glass using the temporal variation of the second received light amount as a reference.
2 Citations
20 Claims
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1. An image reading device comprising:
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contact glass on which an original document is placed; a frame surrounding a periphery of the contact glass; a light emitting section configured to emit light toward the contact glass and the frame; a mirror; a sensor configured to receive first reflected light that has passed through the contact glass and then reflected off the mirror, and second reflected light that has been reflected off the frame and then reflected off the mirror, and detect a first received light amount resulting from the first reflected light and a second received light amount resulting from the second reflected light; a control section configured to compare temporal variation of the first received light amount with temporal variation of the second received light amount; a document cover mounted so as to be openable and closable relative to the contact glass; a first switch configured to detect whether or not the document cover is being closed relative to the contact glass; and a second switch configured to detect whether or not the document cover is closed relative to the contact glass, wherein the control section determines whether or not the temporal variation of the first received light amount indicates presence of the original document on the contact glass using the temporal variation of the second received light amount as a reference, and the control section compares the temporal variation of the first received light amount with the temporal variation of the second received light amount after the first switch has detected that the document cover is being closed and before the second switch detects that the document cover is closed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification
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Current AssigneeKYOCERA Document Solutions, Inc. (Kyocera Corporation)
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Original AssigneeKYOCERA Document Solutions, Inc. (Kyocera Corporation)
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InventorsMatsui, Shinya
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Primary Examiner(s)Siddo, Ibrahim
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Application NumberUS15/007,761Publication NumberTime in Patent Office524 DaysField of SearchUS Class CurrentCPC Class CodesH04N 1/00551 Top covers or the likeH04N 1/00689 PresenceH04N 1/00737 using the scanning elements...H04N 1/00803 Presence or absence of info...
