Power control apparatus of scanning device and method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorHae-Chul Kim
Life of this patent
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Abstract
A device and a method for using a temperature detector to detect heat generated from the lamp of a scanning device to prevent the operation of a scanner while the scanner is overheating. Thus, effectively preventing the degradation of a scanner due to the overheating of the lamp in the scanning device of a multi-function peripheral. In addition, when the lamp becomes overheated, a safety margin can be maintained even when the central processing unit is not operating properly, because the power of the lamp gets cut off compulsorily through hardware rather than software that is necessarily dependent on the central processing unit.
Claims20
A scanner, comprising:
- a body enclosing a means for reading an image from a sheet of paper;
- a scanning device slidably attached inside said body that moves in a reciprocating fashion while reading said image, said scanning device having a lamp;
- a central processing unit;
- a power supplier attached to said body and providing and terminating a power supply to said lamp in said scanning device in response to said central processing unit;
- a temperature detector contained in said body and outputting a first signal representing a temperature detected near said lamp;
- a comparator electrically connected to said temperature detector and outputting a second signal after comparing said first signal with a reference signal;
- said central processing unit connected to said comparator, controlling said power supplier to supply and terminate said power supply to said lamp in response to said second signal;
- and
- a power controller electrically connected to both said comparator and said power supplier, terminating said power supply to said lamp in response to said second signal regardless of said control processing unit controlling said power supplier to supply said power supply to said lamp.
A method of controlling a power supplier for a scanning device, comprising the steps of:
- providing a central processing unit controlling said power supplier to provide and terminate a power supply to a lamp contained in said scanning device;
- detecting a temperature proximate to a lamp caused by a plurality of heat generated from said lamp of said scanning device;
- generating a first signal representing said temperature;
- comparing said first signal with a reference signal;
- outputting a second signal representing that said first signal is greater than a predetermined value;
- and
- terminating said power supply to said lamp in response to said second signal regardless of the control of said central processing unit.
A scanner, comprising:
- a body enclosing a means for reading an image from a sheet of paper;
- a scanning device slidably attached inside said body that moves in a reciprocating fashion while reading said image, said scanning device having a lamp;
- a central processing unit;
- a power supplier connected to said lamp, providing and terminating a power supply to said lamp in said scanning device, in response to the control of said central processing unit;
- a detector disposed adjacent to said lamp to output a first signal representing a temperature of said lamp;
- a comparator electrically connected to said detector and outputting a second signal after comparing said first signal with a reference;
- a power controller electrically connected to both said comparator and said power supplier, preventing said power supplier from supplying said power supply to said lamp in response to said second signal regardless of the control of said central processing unit.
Dependencies are inferred from the claim text.