CN101196708A - Printing medium detecting device, image forming apparatus having the same, and method to detect printing medium - Google Patents

Printing medium detecting device, image forming apparatus having the same, and method to detect printing medium Download PDF

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Publication number
CN101196708A
CN101196708A CNA2007101491231A CN200710149123A CN101196708A CN 101196708 A CN101196708 A CN 101196708A CN A2007101491231 A CNA2007101491231 A CN A2007101491231A CN 200710149123 A CN200710149123 A CN 200710149123A CN 101196708 A CN101196708 A CN 101196708A
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CN
China
Prior art keywords
print media
brightness
signal
heap
live part
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Pending
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CNA2007101491231A
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Chinese (zh)
Inventor
李镐一
金钟奎
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Publication of CN101196708A publication Critical patent/CN101196708A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/12—Scanning systems using multifaceted mirrors
    • G02B26/125—Details of the optical system between the polygonal mirror and the image plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
    • B65H1/14—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device comprising positively-acting mechanical devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/04—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to absence of articles, e.g. exhaustion of pile
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/0005—Optical objectives specially designed for the purposes specified below having F-Theta characteristic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/21—Angle
    • B65H2511/212—Rotary position

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

A printing medium detecting device capable of accurately detecting an amount of printing media in a paper cassette, an image forming apparatus including the printing medium detecting device, and a method to detect a printing medium. The printing medium detecting device of the image forming apparatus includes a light source to emit a light beam to one side of a stack of printing media housed in a paper cassette, a scanning unit to scan the light beam reflected from the stack and generate a signal based on the light beam, and a computing unit to compute information related to the stack based on the signal, wherein the information includes a number of printing media sheets in the stack.

Description

The method of printing medium detecting device, imaging device and detection print media
Technical field
Each side of the present invention relates to a kind of printing medium detecting device, a kind of imaging device and a kind of method that detects print media with this printing medium detecting device.
Background technology
Imaging device (for example, duplicating machine, printer, facsimile recorder and multi-function device) comprises and is used for forming the image-generating unit of image from the print media of carton supply and being used to detect the printing medium detecting device of the amount of the remaining print media of carton.Figure 1A and Figure 1B show the example of the printing medium detecting device 1 of imaging device.
Shown in Figure 1A and Figure 1B, the printing medium detecting device 1 of common imaging device comprises the display pole 3 of piling up plate 2a and being used for rotating around hinge axis 3a that is used for supporting the print media P that is contained in carton 2.
According to the structure shown in Figure 1A and Figure 1B, display pole 3 be linked to move along vertical direction according to the weight of the print media P that piles up pile up plate 2a in, rotate around hinge axis 3a.Therefore, the user can pass through the number of position detection remaining print media P in carton 2 of observation display pole 3.
Yet in this printing medium detecting device 1, the user directly checks display pole 3 with he or she bore hole.In addition, when a plurality of users were just using an imaging device (for example, the network printer), a plurality of imaging signals can be imported simultaneously.Therefore, in this case, when several imaging operations are carried out simultaneously, will be difficult to predict whether the amount of the print media P that is stacked in the carton 2 is enough.
In other words, be not enough to carry out under the situation of each imaging operation at the print media P that carries out a plurality of imaging operations and be contained in the carton 2, after the imaging order was transfused to, the user knew just whether the number of print media P is enough to carry out each imaging operation.
Therefore, problem (comprising that then the imaging operation necessary operations time is elongated if the P of print media midway that carries out in printing runs out) occurs, thereby caused operating efficiency to reduce.
Summary of the invention
Each side of the present invention relates to a kind of printing medium detecting device, a kind of imaging device and a kind of method that detects print media with this printing medium detecting device, and described printing medium detecting device can accurately be notified the amount of print media available in user's imaging device.
According to an aspect of the present invention, a kind of printing medium detecting device of imaging device comprises: light source, the side emission light beam of the print media heap in being contained in carton; Scanning element scans from described heap beam reflected, and produces signal based on described light beam; Computing unit, based on the described calculated signals information relevant with described heap, wherein, described information comprises the number of the print media in the described heap.
According to one side, described printing medium detecting device also comprises the indicating member of transmission based on the information of result of calculation.
According on the one hand, computing unit is by determining to be calculated by the luminance difference of the light beam of scanning element scanning the number of the print media in the described heap.
According on the one hand, computing unit is based on the luminance difference computing information along the signal of the direction vertical with the direction of the paper sheet stacking of print media.
According on the one hand, computing unit is provided with live part between 2 of signal, and calculating described information, 2 of described signal between the minimum brightness in the darkest zone of the maximum brightness in the brightest zone of indication and indication.
According to one side, computing unit also comprises pulse producer, and described pulse producer produces ON pulse signal and OFF pulse signal according to the brightness in the live part.
According to one side, pulse producer produces in ON pulse signal at each corresponding relative bright spot place of each brightness that intersects with the top of live part, in each corresponding relative dim spot place generation OFF pulse signal of each brightness that intersects with the bottom of live part one.
According to one side, computing unit calculates described information according to the quantity of the ON pulse signal that is produced by pulse producer.
According to one side, in described 2 a bit be from minimum brightness towards maximum brightness 80%, in described 2 on the other hand from minimum brightness towards maximum brightness 50%, thereby live part occupy from minimum brightness towards maximum brightness about 50% to 80%.
According to one side, if imaging signal is imported in the imaging device, then indicating member sends described information.
According to one side, light source and scanning element are installed in the carton outside, and light beam reflects to the emission of print media heap and from the print media heap by the pilot hole in the carton.
According to one side, light source and scanning element are arranged in the carton.
According to one side, indicating member calculate to be carried out each needed number by a plurality of imaging operations of network input by a plurality of users, and whether is enough to carry out all imaging operations according to the number in the print media heap information is sent to each user among a plurality of users.
According to a further aspect in the invention, a kind of imaging device comprises: fuselage wherein is equipped with image-generating unit; Carton is attachable to fuselage and also can pulls down from fuselage, and supports the print media heap; Printing medium detecting device.Described printing medium detecting device comprises: light source, to the side emission light beam of described heap; Scanning element scans from described heap beam reflected, and produces signal based on described light beam; Computing unit, based on the described calculated signals information relevant with described heap, wherein, described information comprises the number of the print media in the described heap.
According on the other hand, computing unit is based on the luminance difference computing information along the signal of the direction vertical with the direction of the paper sheet stacking of print media.
According on the other hand, between computing unit 2 in signal live part is set, calculating described information, 2 of described signal between the minimum brightness in the darkest zone of the maximum brightness in the brightest zone of indication and indication.
According on the other hand, computing unit also comprises pulse producer, described pulse producer produces in ON pulse signal at each corresponding relative bright spot place of each brightness that intersects with the top of live part, in each corresponding relative dim spot place generation OFF pulse signal of each brightness that intersects with the bottom of live part one.
According on the other hand, in described 2 a bit be from minimum brightness towards maximum brightness 80%, in described 2 on the other hand from minimum brightness towards maximum brightness 50%, thereby live part occupy from minimum brightness towards maximum brightness about 50% to 80%.
Described imaging device also comprises indicating member, if imaging signal is imported in the imaging device, then described indicating member sends to the user with described information.
According on the other hand, indicating member calculate to be carried out each needed number by a plurality of imaging operations of network input by a plurality of users, and whether is enough to carry out all imaging operations according to the number of the print media in the heap information is sent to each user among a plurality of users.
According to a further aspect in the invention, a kind of method that detects the print media in the imaging device may further comprise the steps: the side emission light beam of the print media heap in being contained in carton; Scanning is from the print media beam reflected, with picked up signal; Based on the calculated signals information relevant with described heap that obtains by scanning, wherein, described information comprises the number of the print media in the described heap.
According on the other hand, described calculation procedure comprises: from described signal measurement brightness; Between 2 in signal live part is set, 2 of described signal between the minimum brightness in the darkest zone of the maximum brightness in the brightest zone of indication and indication; Produce ON pulse signal and OFF pulse signal according to the brightness in the live part; Calculate described information based on the pulse signal that produces.
According on the other hand, described generation step is included in each corresponding relative bright spot place of each brightness of intersecting with the top of live part and produces in ON pulse signal one, in each corresponding relative dim spot place generation OFF pulse signal of each brightness that intersects with the bottom of live part one.
According on the other hand, described calculation procedure comprises according to the quantity of the ON pulse signal that produces calculates described information.
According on the other hand, in described 2 a bit be from minimum brightness towards maximum brightness 80%, in described 2 on the other hand from minimum brightness towards maximum brightness 50%, thereby live part occupy from minimum brightness towards maximum brightness about 50% to 80%.
According on the other hand, described method also comprises if be entered as image signal, then the information of calculating is sent to the user.
To be partly articulated other aspect of the present invention and/or advantage in the following description, by describing, it is clearer that a part can become, and perhaps can understand by implementing the present invention.
Description of drawings
By the description of embodiment being carried out below in conjunction with accompanying drawing, these and/or others of the present invention and advantage will become clear and be easier to and understand, wherein:
Figure 1A and Figure 1B are the schematic sectional view of the printing medium detecting device of common imaging device;
Fig. 2 is the schematic representation according to the imaging device that comprises printing medium detecting device of the embodiment of the invention;
Fig. 3 is the schematic representation of the printing medium detecting device of Fig. 2;
Fig. 4 is that print media is by the schematic representation of the state of scanning element shown in Fig. 3 and light source cell detection;
Fig. 5 A is the amplification diagrammatic sketch of the signal that scanning element produced shown in Fig. 3;
Fig. 5 B is the example graph of the luminance difference of the signal shown in Fig. 5 A;
Fig. 5 C is the example graph of the state of the ON/OFF pulse signal that produced in the live part of Fig. 5 B;
Fig. 6 is the process flow diagram of the method for schematically illustrated detection print media according to the embodiment of the invention;
Fig. 7 is the detailed process flow diagram of operation that the print media number of calculating chart 6 is shown.
Embodiment
To be described in detail embodiments of the invention now, its example shown in the accompanying drawings, wherein, identical label is represented components identical all the time.Below with reference to the accompanying drawings embodiment is described to explain the present invention.
Below, describe printing medium detecting device with reference to the accompanying drawings, comprise the imaging device of this printing medium detecting device and the method that detects print media.
With reference to Fig. 2, comprise according to the imaging device 100 of the embodiment of the invention: fuselage 10 comprises image-generating unit 11; Carton 20 is attachable to fuselage 10 and can pulls down from fuselage 10, and supports a folded print media P; Printing medium detecting device 70, the number of detection remaining print media P in carton 20.Print media P can be various types of, for example, and paper, lantern slide etc.Because image-generating unit 11 and carton 20 are well known to a person skilled in the art, so omitted more detailed description and description of drawings to it.In addition, should be appreciated that carton 20 is not limited to hold paper, but can hold various types of print media P, for example, lantern slide etc.
As shown in Figure 3 and Figure 4, printing medium detecting device 70 comprises light source 30, scanning element 40, computing unit 50 and indicating member 60.The print media P emission light beam of light source 30 in being contained in carton 20 wherein, piles up many print media P in carton 20.As shown in Figure 4, light source 30 is mounted to makes light beam can be transmitted into a side of print media P heap.Specifically, light source 30 is launched light beam along the direction (that is, along grain direction (graindirection) X of print media P, shown in Fig. 5 A) that many print media P are contained in the carton 20.Light source 30 is used to produce at least a in the various smooth generation component (comprising for example traditional bulb or laser instrument) of light beam.Should be appreciated that light source 30 is not limited to along grain direction X emission light beam, but can be along other direction (for example, the stacking direction Y shown in Fig. 5 A) emission light beam.
Scanning element 40 scannings are transmitted into the light beam of print media P from light source 30.Sweep signal by scanning element 40 scannings has been shown in Fig. 5 A and Fig. 5 B.Scanning element 40 is along the grain direction X scanning and printing medium P of print media P, to determine the brightness between the print media P.
Gou Zao light source 30 and scanning element 40 are installed in the fuselage 10 of imaging device 100 as mentioned above, with fuselage 10 switching signal easily, as shown in Figures 2 and 3.According to an aspect of the present invention, pilot hole 21 is formed on a side of carton 20, is used to make light beam to pass through.Yet others of the present invention are unnecessary to be confined to structure shown in Figure 3.For example, light source 30 and scanning element 40 can be installed in the carton 20, thereby can not use pilot hole 21 and fuselage 10 switching signals.
Computing unit 50 calculates the number of remaining print media P in the carton 20 based on the luminance difference of the sweep signal that is produced by scanning element 40.Shown in Fig. 5 A, computing unit 50 calculates along the luminance difference of the sweep signal of the vertical direction Y vertical with grain direction X.Vertical direction Y is the paper sheet stacking direction of print media P.
Specifically, computing unit 50 utilizes the number of the relative bright area calculating print media P between dark areas.As by as shown in the brightness of the sweep signal shown in Fig. 5 A and Fig. 5 B, the relative zone of dark areas indication between the paper of print media P, relative bright area indication print media P.
Computing unit 50 is provided with 2 C of sweep signal and the live part E between the D, calculates the number of print media P then, and described 2 C and D are between the minimum brightness B in the darkest zone of the maximum brightness A in the brightest zone of indication and indication.Therefore, can be between computing unit 50 and pulse producer 51 switching signal, described pulse producer 51 is based on about the brightness measurement of live part E and produce the ON/OFF pulse signal.Specifically, shown in Fig. 5 C, pulse producer 51 is producing in ON pulse signal one with each brightness place that the relative bright spot C at the top of live part E intersects, with each brightness place generation OFF pulse signal that the relative dim spot D of the bottom of live part E intersects in one.
Computing unit 50 calculates the quantity of the ON pulse signal that is produced by pulse producer 51, to obtain the number of print media P.In other words, the quantity of ON pulse signal is corresponding to the number that is contained in the print media P in the carton 20.Yet others of the present invention are unnecessary to be confined to this.Therefore, the number of print media P also can be from the quantity of OFF pulse signal or from the combination of ON/OFF pulse signal and obtain.Therefore, should be appreciated that computing unit 50 can calculate the number of print media P according to alternate manner.For example, if scanning element 40 is used bottom paper in the brightness calculation heap that detects and the distance between the top sheet, then the number of print media P can be by calculating with the distance of this measurement average thickness divided by every paper.
In an embodiment of the present invention, shown in Fig. 5 B, live part E occupies about 80% (C point) from minimum brightness B towards maximum brightness A to the part in the zone of 50% (D point).Yet others of the present invention are unnecessary to be confined to this, and live part E can be any part between maximum brightness A and the minimum brightness B.
Indicating member 60 will with send to the user based on the relevant information of the number of the print media P of the result of calculation of carrying out by computing unit 50.At this moment, if the user is entered as image signal, then indicating member 60 is notified the printing medium information that the user obtains.Specifically, if use a user among a plurality of users of single imaging device to be entered as image signal by network, then indicating member 60 will be corresponding with the imaging signal of all inputs compares the number that is printed and the number of print media P.Then, indicating member 60 sends to a user or a plurality of user by device (for example, a user or a plurality of user's personal computer (PC)) with comparative result, and described PC is connected to the imaging device 100 on the network.Therefore, before carrying out imaging operation, a user or a plurality of user can check the number of print media P exactly, if necessary, user or a plurality of user are recharged print media P in the carton 20, thereby improve operating efficiency.Indicating member 60 can be, for example, is embodied as the computer program on the computer-readable medium (for example, the hard disk of PC), perhaps comprises the device of such computer program.
Each side of the present invention is unnecessary to be confined to indicating member 60 and to send printing medium information in response to the user is entered as image signal.But indicating member 60 can send in the various notification signals at least a (for example, video signal displayed or the sound signal play by audio unit (for example loudspeaker) on display panel), notifying the number of the print media P that the user can be used for printing, and no matter whether the user has imported imaging signal.Therefore, should be appreciated that computing unit 50 is not limited to the number that calculates print media P, it also can calculate the further feature (for example, the height of heap and/or length) of print media P heap.
Describe according to the detection of the embodiment of the invention method with reference to Fig. 3 to Fig. 7 about the information of the number of the print media P in the imaging device 100 of structure as mentioned above.
With reference to Fig. 3, Fig. 4 and Fig. 6, in operation steps S10, the side emission light beam of the print media P heap of light source 30 in being contained in carton 20.Then, in operation steps S20, emitted light beams is launched from a side of print media P heap, is scanned unit 40 scannings then.
Shown in Fig. 5 A and Fig. 5 B, in operation steps S30, computing unit 50 is based on the number of the brightness calculation print media P of a side of the print media P heap that is scanned by scanning element 40.Specifically, as Fig. 5 B and shown in Figure 7, in operation steps S31, computing unit 50 from along the vertical direction Y vertical (that is, print media P pile up direction) with grain direction X by scanning element 40 scannings and the signal measurement brightness that produces.
In operation steps S32, based on the maximum brightness A of the relative brightest area of the brightness calculation indication of measuring with indicate the minimum brightness B of relative dark areas.In operation steps S33, live part E is arranged between a C and the D, described 2 C and D are between maximum brightness A and minimum brightness B.As mentioned above, described 2 C and D correspond respectively to minimum brightness B on the bright spot A about 80% and 50%.Yet, should be appreciated that described 2 C and D also can be corresponding to other percentages.
Then, in operation steps S34, pulse producer 51 produces the ON pulse signal and produces the OFF pulse signal at relative dim spot D at relative bright spot C in live part E.
In operation steps S35, computing unit 50 uses the number that calculates print media P from the quantity of the ON pulse signal of the ON/OFF pulse signal transmission that produces.
If the user is entered as image signal in operation steps S40, then indicating member 60 will send to the user about the information of the number of print media P in operation steps 45.For example, in carton 20, remain under the situation of about 50 print media P, if use user's input among a plurality of users of single imaging device corresponding to 100 imaging signal by network, then indicating member 60 number of notifying the user to be stored in the print media P in the carton 20 by personal computer (PC) is not enough to finish imaging operation.Therefore, the user can be in advance recharges 50 or more print media P in the carton 20.
In an embodiment of the present invention, computing unit 50 is provided with live part E based on scanning and the signal that produces, and uses the number that calculates print media P at the OFF pulse signal of the ON pulse signal at the top of live part E and bottom.Yet others of the present invention are unnecessary to be confined to this.For example, can live part E be set separately and produce ON pulse signal and OFF pulse signal,, perhaps can only calculate the number of print media P based on luminance difference to calculate information about the number of print media P.It should be appreciated by those skilled in the art that and to use the brightness of measuring according to various mode, to calculate the number of print media P by scanning element 40.
As mentioned above, according to embodiments of the invention, when the user is entered as image signal, can accurately detect information, to notify the user with this information about the number of remaining print media P in carton 20.Therefore, each side of the present invention prevented before finishing imaging operation, the interruption of the imaging operation that causes inadequately owing to the number that is contained in the print media P in the carton 20.In other words, each side of the present invention prevents the delay of imaging operation in advance, thereby improves the operating efficiency of imaging operation.
In addition, the number of the pulse signal calculating print media P among the live part E that between maximum brightness and minimum brightness, is provided with can be used, therefore, the number of print media P can be calculated exactly.
Though represented and described some embodiments of the present invention, it should be appreciated by those skilled in the art that under the situation that does not break away from the principle of the present invention that limits its scope by claim and equivalent thereof and spirit, can make amendment to these embodiment.

Claims (26)

1. the printing medium detecting device of an imaging device, described device comprises:
Light source, the side emission light beam of the print media heap in being contained in carton;
Scanning element scans from described heap beam reflected, and produces signal based on described light beam;
Computing unit, based on the described calculated signals information relevant with described heap,
Wherein, described information comprises the number of the print media in the described heap.
2. device as claimed in claim 1 also comprises: indicating member sends the information based on result of calculation.
3. device as claimed in claim 1, wherein, computing unit is by determining to be calculated by the luminance difference of the light beam of scanning element scanning the number of the print media in the described heap.
4. device as claimed in claim 3, wherein, computing unit calculates described information based on the luminance difference along the described signal of the direction vertical with the direction of the paper sheet stacking of print media.
5. device as claimed in claim 4, wherein, live part is set calculating described information between computing unit 2 in described signal, 2 of described signal between the minimum brightness in the darkest zone of the maximum brightness in the brightest zone of indication and indication.
6. device as claimed in claim 5, wherein, computing unit also comprises pulse producer, described pulse producer produces ON pulse signal and OFF pulse signal according to the brightness in the live part.
7. device as claimed in claim 6, wherein, pulse producer produces in ON pulse signal at each corresponding relative bright spot place of each brightness that intersects with the top of live part, in each corresponding relative dim spot place generation OFF pulse signal of each brightness that intersects with the bottom of live part one.
8. device as claimed in claim 7, wherein, computing unit calculates described information according to the quantity of the ON pulse signal that is produced by pulse producer.
9. device as claimed in claim 5, wherein, in described 2 a bit be from minimum brightness towards maximum brightness 80%, in described 2 on the other hand from minimum brightness towards maximum brightness 50%, thereby live part occupy from minimum brightness towards maximum brightness 50% to 80%.
10. device as claimed in claim 2, wherein, if imaging signal is imported in the imaging device, then indicating member sends described information.
11. device as claimed in claim 1, wherein, light source and scanning element are installed in the carton outside, and light beam reflects to the emission of print media heap and from the print media heap by the pilot hole in the carton.
12. device as claimed in claim 1, wherein, light source and scanning element are arranged in the carton.
13. device as claimed in claim 3, wherein, indicating member calculate to be carried out each needed number by a plurality of imaging operations of network input by a plurality of users, and whether is enough to carry out all imaging operations according to the number in the print media heap information is sent to each user among described a plurality of user.
14. an imaging device comprises:
Fuselage wherein is equipped with image-generating unit;
Carton is attachable to fuselage and also can pulls down from fuselage, and supports the print media heap;
Printing medium detecting device comprises:
Light source is to the side emission light beam of described heap;
Scanning element scans from described heap beam reflected, and produces signal based on described light beam;
Computing unit, based on the described calculated signals information relevant with described heap,
Wherein, described information comprises the number of the print media in the described heap.
15. equipment as claimed in claim 14, wherein, computing unit calculates described information based on the luminance difference along the described signal of the direction vertical with the direction of the paper sheet stacking of print media.
16. equipment as claimed in claim 15, wherein, live part is set calculating described information between computing unit 2 in described signal, 2 of described signal between the minimum brightness in the darkest zone of the maximum brightness in the brightest zone of indication and indication.
17. equipment as claimed in claim 16, wherein, computing unit also comprises pulse producer, described pulse producer produces in ON pulse signal at each corresponding relative bright spot place of each brightness that intersects with the top of live part, in each corresponding relative dim spot place generation OFF pulse signal of each brightness that intersects with the bottom of live part one.
18. equipment as claimed in claim 17, wherein, in described 2 a bit be from minimum brightness towards maximum brightness 80%, in described 2 on the other hand from minimum brightness towards maximum brightness 50%, thereby live part occupy from minimum brightness towards maximum brightness 50% to 80%.
19. equipment as claimed in claim 14 also comprises indicating member, if imaging signal is imported in the imaging device, then described indicating member sends to the user with described information.
20. equipment as claimed in claim 19, wherein, indicating member calculate to be carried out each needed number by a plurality of imaging operations of network input by a plurality of users, and whether is enough to carry out all imaging operations according to the number of the print media in the described heap information is sent to each user among described a plurality of user.
21. a method that detects the print media in the imaging device said method comprising the steps of:
The one side emission light beam of the print media heap in being contained in carton;
Scanning is from the print media beam reflected, with picked up signal;
Based on the calculated signals information relevant that obtains by scanning with described heap,
Wherein, described information comprises the number of the print media in the described heap.
22. method as claimed in claim 21, wherein, described calculation procedure comprises:
From described signal measurement brightness;
Between 2 in signal live part is set, 2 of described signal between the minimum brightness in the darkest zone of the maximum brightness in the brightest zone of indication and indication;
Produce ON pulse signal and OFF pulse signal according to the brightness in the live part;
Calculate described information based on the pulse signal that produces.
23. method as claimed in claim 22, wherein, described generation step is included in each corresponding relative bright spot place of each brightness of intersecting with the top of live part and produces in ON pulse signal one, in each corresponding relative dim spot place generation OFF pulse signal of each brightness that intersects with the bottom of live part one.
24. method as claimed in claim 22, wherein, described calculation procedure comprises according to the quantity of the ON pulse signal that produces calculates described information.
25. method as claimed in claim 22, wherein, in described 2 a bit be from minimum brightness towards maximum brightness 80%, in described 2 on the other hand from minimum brightness towards maximum brightness 50%, thereby live part occupy from minimum brightness towards maximum brightness 50% to 80%.
26. method as claimed in claim 21 also comprises if be entered as image signal, then the information of calculating is sent to the user.
CNA2007101491231A 2006-12-04 2007-09-04 Printing medium detecting device, image forming apparatus having the same, and method to detect printing medium Pending CN101196708A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020060121568 2006-12-04
KR20060121568 2006-12-04
KR1020070019558 2007-02-27

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CN101196708A true CN101196708A (en) 2008-06-11

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US7374163B2 (en) * 2004-10-21 2008-05-20 Lexmark International, Inc. Media tray stack height sensor with continuous height feedback and discrete intermediate and limit states
JP4552704B2 (en) * 2005-03-17 2010-09-29 コニカミノルタビジネステクノロジーズ株式会社 Image recording device
JP2006264883A (en) * 2005-03-23 2006-10-05 Fuji Xerox Co Ltd Sheet tray and image forming device

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