US 4,893,196 AGranted

Image reading apparatus

AssigneeKabushiki Kaisha Toshiba

InventorsTakashi Koshiyouji, Tsuyoshi Ishida

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Abstract

An image reading apparatus comprises an original table, a lamp located above the original table and used as a first light source for irradiating light to an original placed on the original table, another lamp located below the original table and used as a second light source for irradiating light to the original, and a photoelectric converter for receiving the light passing through the original or the light reflected therefrom, and converting the light into electric signals. Upon the pushing of a passing-light mode key incorporated in a console panel, the first light source is turned on and is moved, together with the photoelectric converter, in a straight line along the original table, in order to read the image formed on the original which is of the type through which light passes. Alternatively, when a reflected-light mode key is depressed, the second light source is turned on and is moved, together with the photoelectric converter in a straight line along the original table, in order to read the image formed on the original which is of the type from which light is reflected.

Claims24

Dependent claims

An image reading apparatus for reading image data from an original comprising:

a transparent original table for supporting the original;
a first light source, located on one side of said original table, for irradiating light to the original supported on said original table;
a second light source, located on the opposite side of said original table, for irradiating light to the original supported on said original table;
photoelectric converting means, located on said opposite side of said original table, for receiving the light irradiated by said first light source and passing through the original and the light irradiating by said second light source and reflected from the original, for converting the light into a plurality of electric signals, and for outputting the electric signals as image data;
first drive means for moving said first light source along said original table;
second drive means for moving said second light source and said photoelectric converting means along said original table;
original-specifying means for specifying whether original is one of a light-passing type and a light-reflecting type;
and
control means for turning on said first light source and for causing said first and second drive means to move said first light source and said photoelectric converting means along said original table when said original-specifying means specifies that the original is of the light-passing type and for turning on said second light source, keeping said first light source turned off and causing said second drive means to move said first light source and said photoelectric converting means along said original table when said original-specifying means specifies that the original is of the light-reflecting type.

6 more elements

An image reading apparatus for reading image data from an original comprising:

a transparent original table for supporting the original;
a first light source, located on one side of said original table, for irradiating light to the original supported on said original table;
a second light source located on the opposite side of said original table, for irradiating light to the original supported on said original table;
photoelectric converting means for receiving the light irradiated by said first light source and passing through the original and the light irradiated by said second light source and reflected from the original, for converting the light into a plurality of electric signals, and for outputting the electric signals as image data;
first drive means for moving said first light source and said photoelectric converting means simultaneously along said original table;
second drive means for moving said second light source and said photoelectric converting means simultaneously along said original table;
original-specifying means for specifying whether the original is one of a light-passing type and a light-reflecting type;
and
control means for turning on said first light source, for keeping the second light source turned off, and for causing said first drive means to move said first light source and said photoelectric converting means simultaneously along said original table when the original is of the light-passing type and for turning on said second light source, for keeping the first light-source turned off, and for causing said second drive means to move said second light source and said photoelectric converting means simultaneously along said original table when the original is of the light-reflecting type.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/178,615Filed 7 Apr 1988
Priority: JP 62-874889 Apr 1987
Granted: 9 Jan 1990
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04N 1/1026
With sub-scanning by translatory movement of at least a part of the main-scanning components: using a belt or cable
H04N 1/1017
With sub-scanning by translatory movement of at least a part of the main-scanning components: the main-scanning components remaining positionally…
H04N 1/1043
Movement of the main scanning components: of a sensor array
H04N 1/1048
Movement of the main scanning components: of a lens or lens arrangement