Image reading device
AssigneeKyocera Mita Corporation
InventorYasuyuki Horiguchi
Life of this patent
Estimating the term…
Abstract
An image reading device is provided with a contact glass on which a document is to be placed; a group light source in which a plurality of point light sources are linearly arrayed; and a light source unit having the group light source mounted therein and adapted to optically scan a document surface via a contact glass with reading lights emitted from the group light source. The group light source is constructed such that at least one of the plurality of point light sources is a detecting light source for emitting a detection light toward the contact glass to detect the presence or absence of a document on the contact glass.
Claims10
An image reading device, comprising:
- a contact glass on which a document is to be placed,
- a group light source in which a plurality of point light sources are linearly arrayed,
- a light source unit having the group light source mounted therein and adapted to optically scan a document surface via the contact glass with reading lights emitted from the group light source, and
- a size discriminating section for discriminating the size of the document, wherein
- the group light source being constructed such that at least one of the plurality of point light sources is a detecting light source for emitting a detection light toward the contact glass to detect the presence or absence of a document on the contact glass before the size discriminating section discriminates the size of the document.
An image reading device comprising:
- a contact glass on which a document is to be placed,
- a group light source in which a plurality of point light sources are linearly arrayed,
- a light source unit having the group light source mounted therein and adapted to optically scan a document surface via a contact glass with reading lights emitted from the group light source,
- the group light source being constructed such that at least one of the plurality of point light sources is a detecting light source for emitting a detection light toward the contact glass to detect the presence or absence of a document on the contact glass, and
- a light source controller for controlling the group light source, wherein the light source controller keeps only the detecting light source constantly on to detect the presence or absence of a document on the contact glass.
An image reading device comprising:
- a contact glass on which a document is to be placed,
- a group light source in which a plurality of point light sources are linearly arrayed,
- a light source unit having the group light source mounted therein and adapted to optically scan a document surface via a contact glass with reading lights emitted from the group light source,
- the group light source being constructed such that at least one of the plurality of point light sources is a detecting light source for emitting a detection light toward the contact glass to detect the presence or absence of a document on the contact glass, and
- an operating unit arranged at one end of a direction of the linear array of the plurality of point light sources and used to operate the image reading device, wherein the detecting light source is arranged at a position closer to the other end of the light source than to a middle position thereof with respect to the direction of the linear array.
Dependencies are inferred from the claim text.