Method and apparatus for controlling light source in image scanning apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorKyung-rok Kim
Life of this patent
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Abstract
The method to control a light source in an image scanning apparatus includes emitting light onto a reference surface having a predetermined reflectivity from a light source, detecting a shading level representing an intensity of the light reflected from the reference surface, and controlling the light intensity from the light source by using the shading level and the reference level.
Claims20
A method of controlling a light source in an image scanning apparatus, the method comprising:
- emitting light from the light source onto a reference surface having a predetermined reflectivity;
- detecting a shading level representing an intensity of the light reflected from the reference surface;
- comparing the detected shading level with a reference level representing the predetermined reflectivity of the reference surface;
- and
- controlling the intensity of the light emitted from the light source by using the detected shading level and the reference level according to a result of the comparison.
A light source control apparatus for controlling a light source of an image scanning apparatus, the light source control apparatus comprising:
- a light source to emit light onto a reference surface having a predetermined reflectivity;
- a detector to detect a shading level representing an intensity of the light reflected from the reference surface, wherein the detector detects image data of a document from the light scanned and reflected from the document;
- a storage unit to store a reference level representing the predetermined reflectivity of the reference surface;
- a comparator to compare the shading level with the reference level stored in the storage unit;
- a light intensity controller to control the intensity of the light emitted from the light source by using the detected shading level and the reference level according to a comparison result;
- and
- an output unit to output the detected image data.
An image scanning apparatus comprising:
- a detector to detect a shading level that represents an intensity of light which is emitted onto a reference surface having a predetermined reflectivity and reflected from the reference surface, wherein the detector detects image data of a document from the light emitted and reflected from the document;
- a comparator to compare the shading level with a reference level that represents the predetermined reflectivity of the reference surface;
- a light intensity controller to control the intensity of the light emitted from the light source by using the shading level and the reference level according to the comparison result;
- and
- an output unit to output the detected image data.
An image forming apparatus comprising:
- an image scanning apparatus to detect a shading level that represents an intensity of light which is emitted onto a reference surface having a predetermined reflectivity and reflected from the reference surface, to compare the shading level with a reference level that represents the predetermined reflectivity of the reference surface, controlling the intensity of the light emitted from the light source by using the shading level and the reference level according to the comparison result, to scan image data of a scanned object from the light reflected from the scanned object;
- and
- an image forming unit to form an image of printing data representing the image data scanned by the image scanning apparatus.
Dependencies are inferred from the claim text.