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US 2004/0165223 A1Published application
Original size detecting apparatus, original size detecting method, and program for original size detection
AssigneeCanon Kabushiki Kaisha
InventorsKatsuhiro Ishido, Takashi Soya
Life of this patent
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Abstract
An original size detecting apparatus is capable of carrying out accurate original size detection without erroneous detection of the size of an original due to the influence of external scattered light. A CCD reads reflected light of light irradiated from a light source onto an original placed on an original platen glass. Optical sensors detect two open states of the original presser plate, and a scanner controller performs predetermined control corresponding to each of the open states of the original presser plate detected by the optical sensors, to determine the size of the original based on the result of the reading by the CCD.
Claims17
An original size detecting apparatus comprising:
- an original platen;
- an original presser plate that presses an original placed on said original platen;
- a light source that irradiates light onto the original;
- a reflected light-reading device that reads reflected light of the light irradiated from said light source onto the original;
- an open state-detecting device that detects at least two open states of said original presser plate;
- and
- an original size-determining device that performs predetermined control corresponding to each of the open states of said original presser plate detected by said open state-detecting device, to determine a size of the original based on a result of the reading by said reflected light-reading device.
4 more elements
An original size detecting apparatus comprising:
- an original platen;
- an original presser plate that presses an original placed on said original platen;
- a light source that irradiates light onto the original;
- a reflected light-reading device that reads reflected light of the light irradiated from said light source onto the original;
- an open state-detecting device that detects at least two open states of said original presser plate;
- and
- an original size-determining device that turns on said light source and said reflected light-reading device when it is detected by said open state-detecting device that said original presser plate is in a first open state, and determines a size of the original based on an output from said reflected light-reading device when it is detected by said open state-detecting device that said original presser plate is in a second open state where an opening angle thereof is smaller than when said original presser plate is in the first open state.
4 more elements
An original size detecting apparatus comprising:
- an original platen that supports an original to be read;
- a light source that irradiates light onto the original;
- a first detecting device that detects whether or not a dimension of the original in a sub-scanning direction is equal to or smaller than a predetermined dimension;
- a second detecting device that detects a dimension of the original in a main-scanning direction orthogonal to the sub-scanning direction;
- and
- a control and determining device that controls said first and second detecting devices to determine a size of the original based on respective results of detections by said first and second detecting devices,
- wherein said control and determining device carries out a first original size-determining process when an output from said second detecting device indicative of a result of detection carried out thereby with said light source turned off contains components having smaller values than a predetermined output value, and carries out a second original size-determining process when the output from said second detecting device indicative of the result of detection carried out thereby is equal to or larger than the predetermined output value.
4 more elements
An original size detecting method comprising:
- a reflected light-reading step of reading reflected light of light irradiated from a light source onto an original which is placed on an original platen and pressed by an original presser plate;
- an open state-detecting step of detecting at least two open states of the original presser plate;
- and
- an original size-determining step of performing predetermined control corresponding to each of the open states of the original presser plate detected in said open state-detecting step, to determine a size of the original based on a result of the reading in said reflected light-reading step.
1 more element
An original size detecting method comprising:
- a reflected light-reading step of causing a reflected light-reading device to read reflected light of light irradiated from a light source onto an original which is placed on an original platen and pressed by an original presser plate;
- an open state-detecting step of detecting at least two open states of the original presser plate;
- and
- an original size-determining step of turning on the light source and the reflected light-reading device when it is detected in said open state-detecting step that the original presser plate is in a first open state, and determining a size of the original based on an output from the reflected light-reading device in said reflected light-reading step when it is detected in said open state-detecting step that the original presser plate is in a second open state where an opening angle thereof is smaller than when the original presser plate is in the first open state.
1 more element
An original size detecting method applied to an original size detecting apparatus including an original platen that supports an original to be read, and a light source that irradiates light onto the original,
- the method comprising:
- a first detecting step of detecting whether or not a dimension of the original in a sub-scanning direction is equal to or smaller than a predetermined dimension and generating an output indicative of a result of the detection;
- a second detecting step of detecting a dimension of the original in a main-scanning direction orthogonal to the sub-scanning direction and generating an output indicative of a result of the detection;
- and
- a control and determining step of controlling said first and second detecting steps to determine a size of the original based on respective results of detections in said first and second detecting steps, and
- wherein said control and determining step comprises carrying out a first original size-determining process when the output indicative of the result of detection carried out in said second detecting step with the light source turned off contains components having smaller values than a predetermined output value, and carrying out a second original size-determining process when the output indicative of the result of the detection in said second detecting step is equal to or larger than the predetermined output value.
3 more elements
An original size detecting program carried out by an original size detecting apparatus including an original platen, an original presser plate that presses an original placed on the original platen, and a light source that irradiates light onto the original,
- the program comprising:
- a reflected light-reading module for reading reflected light of the light irradiated from the light source onto the original;
- an open state-detecting module for detecting at least two open states of the original presser plate;
- and
- an original size-determining module for performing predetermined control corresponding to each of the open states of the original presser plate detected by said open state-detecting module, to determine a size of the original based on a result of the reading by said reflected light-reading module.
2 more elements
An original size detecting program executed by an original size detecting apparatus including an original platen, an original presser plate that presses an original placed on the original platen, and a light source that irradiates light onto the original,
- the program comprising:
- a reflected light-reading module for causing a reflected light-reading device to read reflected light of the light irradiated from the light source onto the original;
- an open state-detecting module for detecting at least two open states of the original presser plate;
- and
- an original size-determining module for turning on the light source and the reflected light-reading device when it is detected by said open state-detecting device that the original presser plate is in a first open state, and determining a size of the original based on an output from the reflected light-reading device when it is detected by said open state-detecting module that the original presser plate is in a second open state where an opening angle thereof is smaller than when the original presser plate is in the first open state.
2 more elements
An original size detecting program executed by an original size detecting apparatus including an original platen that supports an original to be read, and a light source that irradiates light onto the original,
- the program comprising:
- a first detecting module for detecting whether or not a dimension of the original in a sub-scanning direction is equal to or smaller than a predetermined dimension and generating an output indicative of a result of the detection;
- a second detecting device module for detecting a dimension of the original in a main-scanning direction orthogonal to the sub-scanning direction and generating an output indicative of a result of the detection;
- and
- a control and determining module for controlling said first and second detecting modules and determining a size of the original based on respective results of detections by said first and second detecting modules,
- wherein said control and determining module carries out a first original size-determining process when the output indicative of the result of detection carried out by said second detecting module with the light source turned off contains components having smaller values than a predetermined output value, and carries out a second original size-determining process when the output indicative of the result of the detection by said second detecting module is equal to or larger than the predetermined output value.
3 more elements
Dependencies are inferred from the claim text.