US 8,553,276 B2 · Image reading apparatus and image forming apparatus

Abstract

An image reading apparatus includes a contact glass having a light control glass part having transmittance changeable by an applied voltage; a scanner part reading an original placed on an original placement surface of the contact glass and outputting image data in a storage part; a projector part projecting image information onto the contact glass from a side opposite to the original placement surface; and a control part controlling the voltage applied to the light controlling glass part. When the scanner part is operated, the control part causes the transmittance of the contact glass to increase and the projector part stops projecting the image information, and when the scanner part is not operated, the control part causes the transmittance of the contact glass to decrease and the projector part projects the image data stored in the storage part onto the contact glass.

Claims19

Dependent claims

An image reading apparatus that reads an image of an original placed on a contact glass and outputs the read image as printing data according to a paper size or a printing magnification which has been set, comprising:

the contact glass having a light control glass part that has transmittance which is changed according to a state of a voltage being applied, and having one side that acts as an original placement surface;
a scanner part that reads the original placed on the contact glass and outputs image data of the read original in a storage part;
a projector part that projects image information onto the contact glass from a side of the contact glass opposite to the original placement surface;
and
a control part that controls the voltage to be applied to the light control glass part, wherein
at a time of the scanner part being operated, the control part controls the voltage to increase the transmittance of the contact glass, and the projector part stops projecting the image information onto the contact glass, and
at a time of the scanner part being not operated, the control part controls the voltage to decrease the transmittance of the contact glass, and the projector part carries out first image displaying of projecting the image data stored in the storage part as the image information onto the contact glass.

4 more elements

An image reading method of reading an image of an original placed on a contact glass and outputting the read image as printing data according to a paper size or a printing magnification which has been set, comprising:

reading the image of the original placed on the contact glass that has a light control glass part that has transmittance which is changed according to a state of a voltage being applied and has one side that acts as an original placement surface, and outputting image data of the read original to a storage part;
projecting image information onto the contact glass from a side of the contact glass opposite to the original placement surface;
and
controlling the voltage to be applied to the light control glass part, wherein
at the time of reading the image of the original, the voltage is controlled to increase the transmittance of the contact glass, and projection of the image information onto the contact glass is stopped, and
at a time of other than reading the image of the original, the voltage is controlled to decrease the transmittance of the contact glass, and first image displaying of projecting the image data stored in the storage part as the image information onto the contact glass is carried out.

3 more elements

Dependencies are inferred from the claim text.

Image reading apparatus and image forming apparatus

Life of this patent

Image reading apparatus and image forming apparatus

Life of this patent

Abstract

Claims19