EP0264190A1 - Procédé pour le réglage et la détection de la densité d'une image dans un appareil de formation d'images - Google Patents

Procédé pour le réglage et la détection de la densité d'une image dans un appareil de formation d'images Download PDF

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Publication number
EP0264190A1
EP0264190A1 EP87308061A EP87308061A EP0264190A1 EP 0264190 A1 EP0264190 A1 EP 0264190A1 EP 87308061 A EP87308061 A EP 87308061A EP 87308061 A EP87308061 A EP 87308061A EP 0264190 A1 EP0264190 A1 EP 0264190A1
Authority
EP
European Patent Office
Prior art keywords
image density
state
indicators
indicator
setting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87308061A
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German (de)
English (en)
Other versions
EP0264190B1 (fr
Inventor
Masahiro Watashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co Ltd
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Publication date
Application filed by Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Publication of EP0264190A1 publication Critical patent/EP0264190A1/fr
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Publication of EP0264190B1 publication Critical patent/EP0264190B1/fr
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5016—User-machine interface; Display panels; Control console
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure

Definitions

  • This invention relates to a method for setting and visually indicating the image density of image forming apparatus, such as electrophotographic copying machines and facsimile terminal equipment, according to the density of an original.
  • JP-A-11364/1982 discloses an exposure setting device, that is, an image density setting device, comprising means for changing the exposure amount to a desired amount in steps and then setting the desired amount and means for visually indicating the amount in steps in accordance with the set content of the setting means.
  • the present invention has the object of providing a method for setting and indicating image density which makes it possible to change the image density finely and indicate a changed image density without using a large number of indicators.
  • Fig. 1 shows an operation panel 100 of apparatus such as copying machine in which a method of the present invention is performed.
  • Indicated at 101 is a copy number indicator
  • indicated at 102 is a ten-key array for setting the number of copy
  • indicated at 103 is a start button
  • indicated at 104 and 105 are setting keys for changing the exposure in steps in accordance with the density of original.
  • the numeral 104 indicates an UP key and the numeral 105 a DOWN key.
  • Indicated at L is an indicating device including a row of a plurality of indicators(seven indicators in the case of the present embodiment) which are lighted to visually indicate an image density changed by the setting keys 104, 105.
  • a light emitting diode (LED) is used for the indicator.
  • the indicating device L visually indicates the image density in the following way.
  • the first indicator 1 positioned at the left end is lighted when the image density is reduced so as to correspond to the lightest original.
  • the seventh indicator 7 positioned at the right end is lighted when the image density is increased so as to correspond to the darkest original.
  • the second through sixth indicators are lighted corresponding to an image density changed in steps by the setting keys 104, 105.
  • the fourth indicator 4 positioned at the intermediate portion indicates a standard image density.
  • Fig. 2 shows the first method embodying the present invention which sets and indicates the image density in the case of increasing and decreasing from an image density to the next image density.
  • the fourth indicator 4 is lighted, in other word, the lighted indicator 4 is colored black, an image density is set, for example, an image density of "4".
  • the fourth indicator 4 is switched on and off as shown in Fig. 2(b). Radial lines around the indicator 4 represents the indicator being held in the ON-and-OFF state. The ON-and-OFF state indicates that the image density is set at "4.5".
  • Fig. 2 shows the first method embodying the present invention which sets and indicates the image density in the case of increasing and decreasing from an image density to the next image density.
  • the fourth indicator is changed from the ON-and-OFF state to the OFF state and the fifth indicator 5 next to the fourth indicator 4 is lighted. That is, an image density of "5" is set.
  • an intermediate image density is set and indicated by switching on and off the indicator.
  • Fig. 3 shows the second embodiment in which the fifth indicator 5 is switched on and off to indicate an image density of "4.5" as shown in Fig. 3(b).
  • the image density is indicated by the method of Fig. 2 when increasing the image density and by the method of Fig. 3 when decreasing the image density, or in reverse to the above. More specifically, an image density of "4.5" is indicated by the ON-and-OFF state of the fourth indicator 4 in the case of increasing the image density and by the ON-and-OFF state of the fifth indicator 5 in the case of decreasing the density.
  • the ON-and-OFF state of the indicator gives two interpretations in the above embodiments. More specifically, the ON-and-OFF state of the fourth indicator 4 can be interpreted in two way, that is, an image density of "3.5" and an image density of "4.5". Also, the ON-and-OFF state of the fifth indicator 5 can be interpreted as an image density of "4.5” or an image density of "5.5”. Therefore, it is desirable to define which of two intermediate image densities the ON-and-OFF state of the indicator indicates according to copying machines and notify the definition. In the first embodiment of Fig. 2, the ON-and-OFF state of the indicator indicates an image density added "0.5" to an image density of the indicator coming on and off. The second embodiment of Fig.
  • Fig. 4 shows the third method embodying the present invention which sets and indicates the image density.
  • the intermediate state is provided in which the indicators next to each other are lighted at the same time.
  • An intermediate image density is set in the state that the two indicators are lighted at the same time. More specifically, a state of Fig. 4(a) in which the fourth indicator 4 is lighted is changed to a state of Fig. 4(b) in which the fourth and fifth indicators 4 and 5 are lighted at the same time by pushing the UP key 104 one time, and then changed to a state of Fig. 4(c) in which the fifth indicator 5 is lighted by pushing the UP key 104 one more time. In the intermediate state in which the fourth and fifth indicators are lighted at the same time, an image density of "4.5" is set. It will be apparent that instead of the simultaneous lighting of two indicators, it is appropriate to switch on and off two indicators next to each other at the same time.
  • Fig. 6 shows a variation of the embodiments of Figs 4 and 5.
  • the state of Fig. 6(b) is provided in which one indicator, for example the indicator 4, is lighted and the next indicator 5 is switched on and off and an image density of "4.25" is set.
  • the state of Fig. 6(d) is provided in which the indicator 4 is switched on and off and the indicator 5 is lighted and an image density of "4.75" is set. Accordingly, it is possible to change the image density by "0.25".
  • the body of a copying machine is provided with a selection switch for changing from a mode in which intermediate states are provided as mentioned above to a mode in which no intermediate states are provided as conventional method and vice versa.
  • Fig. 7 shows the construction of a control circuit for carrying out the method of the present invention.
  • Signals from the UP key 104 and the DOWN key 105 are sent to a microcomputer 106 constituting a control unit for controlling the whole of a copying machine.
  • a command of the microcomputer 106 is sent to an exposure voltage control circuit 107 in which then render an exposure lamp 108 work at a set image density.
  • the indicating device L is operated by the microcomputer 106 as mentioned above.
  • Fig. 8 is a flowchart of procedure in accordance with which the microcomputer 106 executes the image density indication of Figs. 2 and 3.
  • Fig. 9 is a flowchart of procedure in accordance with which the microcomputer 106 executes the image density indication of Figs. 4 and 5.
  • an image density setting routine is started.
  • the fourth indicator 4 is lightee which corresponds to an image density of "4".
  • step S3 it is checked whether there is an input signal from the UP key 104 or the DOWN key 105. If YES, the procedure proceeds to step S4 at which it is checked whether the indicating device is in the light state. If YES, in other words, when the indicating device is in the state of Fig.
  • step S5 an indicator (LED) corresponding to an input signal of the keys is switched on and off.
  • step S6 it is checked whether there is an input signal from the keys. If YES, the procedure returns to step S4. If NO, the procedure returns to the main routine. If the answer of step S4 is NO, in other words, when the indicating device is in such switching on and off state as shown in Fig. 2(b) or Fig.
  • step S8 the procedure proceeds to step S8 at which an indicator (LED) corresponding to the key input signal is lighted. Consequently, when the key input is done by the UP key 104, the indicating device comes to the state of Fig. 2(c) or Fig. 3(c).
  • step S6 the answer of step S6 is kept at YES. Accordingly, the procedure alternately proceeds to step S5 and step S8, so that indicators are put into the lighting state and ON-and-OFF state alternately and successively.
  • step S3 the answer of step S3 is kept at YES, the procedure proceeds to step S4 and then alternately to step S5 and step S8, so that the indicating device operates in the same way as mentioned above.
  • step S4 ⁇ it is checked whether only one indicator is lighted. If YES, in other words, if the indication device is in the state of Fig. 4(a) or Fig. 5(a), the procedure proceeds to step S5 ⁇ at which two indicators (LED) corresponding to the key input signal is lighted or switched on and off. Consequently, when the key input is done up by the UP key 104, the indicating device comes to the state of Fig. 4(b) or Fig. 5(b).
  • step S8 ⁇ at which one indicator (LED) corresponding to the key input signal is lighted. Consequently, the indicating device comes to the state of Fig. 4(c) or in Fig 5(c). The lighting position of the indicating device is changed according to the input signal of the image density setting keys in such a way as mentioned above.
  • the present invention which sets and indicates a set image density in steps by lighting a particular indicator of a plurality of indicators and further sets and indicates an intermediate image density in steps by switching on and off an indicator, or lighting or switching on and off two indicators next to each other at the same time, makes it possible to set and indicate the image density by an increased number of stages without increasing the number of indicator, consequently assuring setting and indicating of an image density more suitable to the density of original at a reduced cost.
EP19870308061 1986-09-12 1987-09-11 Procédé pour le réglage et la détection de la densité d'une image dans un appareil de formation d'images Expired - Lifetime EP0264190B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP216247/86 1986-09-12
JP61216247A JPS6370840A (ja) 1986-09-12 1986-09-12 露光量の設定および表示方法

Publications (2)

Publication Number Publication Date
EP0264190A1 true EP0264190A1 (fr) 1988-04-20
EP0264190B1 EP0264190B1 (fr) 1992-12-02

Family

ID=16685577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870308061 Expired - Lifetime EP0264190B1 (fr) 1986-09-12 1987-09-11 Procédé pour le réglage et la détection de la densité d'une image dans un appareil de formation d'images

Country Status (3)

Country Link
EP (1) EP0264190B1 (fr)
JP (1) JPS6370840A (fr)
DE (1) DE3782914T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2345176A (en) * 1998-12-22 2000-06-28 Canon Kk Graphic user interface

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123452A1 (de) * 1980-06-13 1982-02-25 Minolta Camera K.K., Osaka Mechanische anordnung fuer eine betaetigungsvorrichtung
DE3334361A1 (de) * 1982-09-24 1984-03-29 Canon K.K., Tokyo Kopiergeraet

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159136A (ja) * 1985-12-29 1987-07-15 Toshiba Corp 電子複写装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123452A1 (de) * 1980-06-13 1982-02-25 Minolta Camera K.K., Osaka Mechanische anordnung fuer eine betaetigungsvorrichtung
DE3334361A1 (de) * 1982-09-24 1984-03-29 Canon K.K., Tokyo Kopiergeraet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 75 (P-114)[953], 12th May 1982; & JP - A - 57 11364 (TOKYO SHIBAURA DENKI) 21-01-1982 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2345176A (en) * 1998-12-22 2000-06-28 Canon Kk Graphic user interface
GB2345174A (en) * 1998-12-22 2000-06-28 Canon Kk Graphic user interface
GB2345176B (en) * 1998-12-22 2003-07-16 Canon Kk Graphic user interface

Also Published As

Publication number Publication date
JPS6370840A (ja) 1988-03-31
DE3782914T2 (de) 1993-06-09
EP0264190B1 (fr) 1992-12-02
DE3782914D1 (de) 1993-01-14

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