Image Reading Apparatus
First Claim
1. An image reading apparatus comprising:
- a document placing table having a transparent member on which a document is placed;
a document pressing member that is openably provided on the document placing table and covers the transparent member;
an image reading unit that irradiates light from a light source onto the document and reads an image on the document based on reflected light;
a scanning unit that is disposed on a side opposite to a document placing surface of the transparent member and reciprocates in a predetermined direction along the transparent member with the image reading unit mounted thereon;
an open/closed state detecting unit that detects open and closed states of the document pressing member;
a control unit that controls an image reading operation of the image reading unit and a reciprocation movement of the scanning unit; and
a reference member that serves as a luminance reference of the image reading unit, wherein, when the open/closed state detecting unit detects the open state of the document pressing member, the control unit set a predetermined light intensity set value to a light intensity value of light irradiated from the light source at the time of image reading.
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Accused Products
Abstract
An image reading apparatus includes a document placing table having a transparent member, a document pressing member, an image reading unit, a scanning unit that is disposed on a side opposite to a document placing surface of the transparent member and reciprocates in a predetermined direction along the transparent member with the image reading unit mounted thereon, an open/closed state detecting unit that detects open and closed states of the document pressing member, a control unit that controls an image reading operation of the image reading unit and a reciprocation movement of the scanning unit, and a reference member that serves as a luminance reference of the image reading unit. When the open/closed state detecting unit detects the open state of the document pressing member, the control unit set a predetermined light intensity set value to a light intensity value of light irradiated from the light source at the time of image reading.
42 Citations
27 Claims
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1. An image reading apparatus comprising:
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a document placing table having a transparent member on which a document is placed;
a document pressing member that is openably provided on the document placing table and covers the transparent member;
an image reading unit that irradiates light from a light source onto the document and reads an image on the document based on reflected light;
a scanning unit that is disposed on a side opposite to a document placing surface of the transparent member and reciprocates in a predetermined direction along the transparent member with the image reading unit mounted thereon;
an open/closed state detecting unit that detects open and closed states of the document pressing member;
a control unit that controls an image reading operation of the image reading unit and a reciprocation movement of the scanning unit; and
a reference member that serves as a luminance reference of the image reading unit, wherein, when the open/closed state detecting unit detects the open state of the document pressing member, the control unit set a predetermined light intensity set value to a light intensity value of light irradiated from the light source at the time of image reading. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An image reading apparatus comprising:
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a document placing table having a transparent member on which a document is placed;
a document pressing member that is openably provided on the document placing table and covers the transparent member;
an image reading unit that irradiates light from a light source onto the document and reads an image on the document based on reflected light;
a scanning unit that is disposed on a side opposite to a document placing surface of the transparent member and reciprocates in a predetermined direction along the transparent member with the image reading unit mounted thereon;
an open/closed state detecting unit that detects open and closed states of the document pressing member;
a control unit that controls an image reading operation of the image reading unit and a reciprocation movement of the scanning unit;
a first reference member that is disposed in a region where the transparent member is exposed as an outer surface of the document placing table and serves as a luminance reference of the image reading unit; and
a second reference member that is disposed in a region other than the region where the transparent member is exposed as the outer surface of the document placing table and serves as a luminance reference of the image reading unit, wherein, when the open/closed state detecting unit detects the closed state of the document pressing member, the control unit moves the scanning unit to a position facing the first reference member, and performs an output adjustment of the image reading unit about the first reference member, and when the open/closed state detecting unit detects the open state of the document pressing member, the control unit moves the scanning unit to a position facing the second reference member, and performs an output adjustment of the image reading unit about the second reference member. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification