JPS6163869A - Laser beam quantity adjusting device for image formation of electrophotographic copying machine - Google Patents

Laser beam quantity adjusting device for image formation of electrophotographic copying machine

Info

Publication number
JPS6163869A
JPS6163869A JP18436484A JP18436484A JPS6163869A JP S6163869 A JPS6163869 A JP S6163869A JP 18436484 A JP18436484 A JP 18436484A JP 18436484 A JP18436484 A JP 18436484A JP S6163869 A JPS6163869 A JP S6163869A
Authority
JP
Japan
Prior art keywords
counter
signal
laser beam
copying machine
electrophotographic copying
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.)
Pending
Application number
JP18436484A
Other languages
Japanese (ja)
Inventor
Shigeru Yamazaki
茂 山崎
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP18436484A priority Critical patent/JPS6163869A/en
Publication of JPS6163869A publication Critical patent/JPS6163869A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/32—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head
    • G03G15/326—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head by application of light, e.g. using a LED array
    • 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
    • G03G15/04036—Details of illuminating systems, e.g. lamps, reflectors
    • G03G15/04045—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers
    • G03G15/04072—Details of illuminating systems, e.g. lamps, reflectors for exposing image information provided otherwise than by directly projecting the original image onto the photoconductive recording material, e.g. digital copiers by laser

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Laser Beam Printer (AREA)

Abstract

PURPOSE:To increase the quantity of laser beam economically by forming plural contacts to be turned on by a prescribed counted value on a counter and changing resistors for adjusting the power of picture forming laser beam which are connected to the contacts. CONSTITUTION:When the counter 10 counts a prescribed value, a contact A of the counter 10 makes and a signal A is inputted to a controller 11, which outputs a signal for turning on a Tr2 to turn on the Tr2. When the counter 10 counts the succeeding prescribed value, a signal B is inputted to the controller 11, which outputs a signal for turning on a TR3 to turn on the Tr3. When the Tr2, Tr3 are turned on, current values of current flowing into respective semiconductors are increased and the emission of a semiconductor laser 13 goes up. When the counter 10 reaches the succeeding prescribed value, a contact C of the counter makes, a signal C is inputted to the controller 11 and an LED 12 for displaying the life of a photosensitive body is turned on.

Description

【発明の詳細な説明】 （技術分野） 本発明は感光体に帯電し、レーザー光で露光を行いトナ
ー画像を形成するようにした電子写真複写機の画像形成
用レーザー光量調整装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a laser light amount adjustment device for image formation in an electrophotographic copying machine, which charges a photoreceptor and exposes it to laser light to form a toner image. .

（従来技術） 感光体に帯電し、レーザー光で露光を行いトナー画像を
形成するようにした電子写真複写機に於て、従来は表面
電位計により感光体の表面電位を検知してレーザー光量
を補正していたが非常に高価になるという欠点があった
。(Prior art) In an electrophotographic copying machine in which a photoconductor is charged and exposed to laser light to form a toner image, conventionally, a surface electrometer detects the surface potential of the photoconductor to determine the amount of laser light. Although it was corrected, it had the drawback of being extremely expensive.

（目的） 本発明は高価な表面電位計を用いず、画像形成毎にカウ
ントアツプする安価なメカニカルなカウンターによりレ
ーザー光のパワー調整用抵抗値を変化してパワーアップ
して画像品質低下を防止することを目的としている。(Purpose) The present invention does not use an expensive surface electrometer, but uses an inexpensive mechanical counter that counts up each time an image is formed to change the resistance value for adjusting the power of the laser beam to increase the power and prevent image quality from deteriorating. The purpose is to

（構成） 本゛発明は上記目的を達成するため感光体に帯電し、レ
ーザー光で露光を行いトナー画像を形成するようにした
電子写真複写機に於て、画像形成を行う毎にカウントア
ツプするカウンターを設け、該カウンターに所定カウン
ト値でオンする複数個の接点を形成し、該接点に接続さ
れた画像形成用のレーザー光のパワー調整用抵抗を変化
させる如くしたことを特徴とするものである。以下実施
例に基づいて具体的に説明する。(Structure) In order to achieve the above object, the present invention is an electrophotographic copying machine in which a photoreceptor is charged and exposed to laser light to form a toner image, and each time an image is formed, a count is increased. A counter is provided, a plurality of contacts are formed on the counter that turn on at a predetermined count value, and a resistor connected to the contacts for adjusting the power of the image forming laser beam is changed. be. Hereinafter, a detailed explanation will be given based on an example.

第１図は本発明を実施する電子写真複写機で、１は帯電
部□、２は露光部、３は現像部、４は感光体ベルトマガ
ジン、５は転写部、６は定着部、７は除電部、８はクリ
ーニング部、９は給紙部である。FIG. 1 shows an electrophotographic copying machine embodying the present invention, in which 1 is a charging section, 2 is an exposure section, 3 is a developing section, 4 is a photoreceptor belt magazine, 5 is a transfer section, 6 is a fixing section, and 7 is a Reference numeral 8 designates a static eliminating section, 8 a cleaning section, and 9 a paper feeding section.

第２図１０は画像形成を行う毎にカウントアツプするカ
ウンターで、初期又は新品の感光体ベルトマガジンをセ
ットした時のカウント値はｏｏｏｏｏである。古い感光
体ベルトマガジンを新品の感光体ベルトマガジンと交換
し装置にセットすると感光体ベルトマガジンについてい
る爪でリセット釦を押し、カウンターはリセットされる
。爪は装置に確実にセットされると折れて、２度とリセ
ット釦を押さないようになっている。カウンター１０は
通常に使用するメカニカルカウンターであり、１万の単
位の桁に接点を設けである。従ってｏｏｏｏｏ〜００９
９９９　　は無接点、０１００００〜０１９９９９はＡ
接点、０２００００〜０２９９９９はＢ接点、０３００
００〜０３９９９９　　はＣ接点をメークし、夫々Ａ信
号、Ｂ信号、Ｃ信号をコン）ｏ−ラ１１に入力されるよ
うになっている。露光部には半導体レーザー又はＨ，−
Ｎ、　　レーザーを用いている。Ｈｅ−Ｎ、レーザーの
場合は光量補正・部には光変調器を使用しなければなら
ないので光量補正信号は該光変調器の変調電圧を変化す
ることになる。Ｔγ１は画像信号の信号で変調用である
。感光体ベルトマガジン４が新品又は初期の時はカウン
ター１０からの信号は発生しないため、Ｔγ２１””３
はオフで感光体寿命表示用ＬＥＤ１２も点灯しない。カ
ウンター１０が０１００００カウント値になるとカウン
ター１０のＡ接点がメークし、コントローラ１１にＡ信
号が入力されＴｒ２をオンする信号を出力しＴｒ２をオ
ンする。次にカウンター１０が０２００００になるとＢ
信号が入力されコントローラ１１はＴｒ３をオンする信
号を出力しＴｒ３をオンする。Ｔｒ２．Ｔγ３がオンす
ると夫々半導体１３に流れる電流がアップし半導体レー
ザー１３の発光量がアップする。次にカウンター１０が
０３００００になるとカウンター１０のＣ接点がメーク
しフン）ｏ−ラ１１にＣ信号が入力され感光体寿命表示
用ＬＥＤ　１２が点灯する。FIG. 2 10 shows a counter that counts up every time an image is formed, and the count value is ooooo when an initial or new photosensitive belt magazine is set. When the old photoreceptor belt magazine is replaced with a new photoreceptor belt magazine and set in the device, the reset button is pressed with the claw attached to the photoreceptor belt magazine, and the counter is reset. The claw breaks when it is securely set in the device, preventing you from pressing the reset button again. The counter 10 is a commonly used mechanical counter, and a contact point is provided at the 10,000 digit. Therefore ooooo~009
999 is non-contact, 010000-019999 is A
Contacts, 020000 to 029999 are B contacts, 0300
00 to 039999 make the C contact, and the A signal, B signal, and C signal are respectively input to the controller 11. The exposure section is equipped with a semiconductor laser or H,-
N. Uses a laser. In the case of He-N or laser, an optical modulator must be used for the light amount correction section, so the light amount correction signal changes the modulation voltage of the optical modulator. Tγ1 is an image signal signal for modulation. When the photoreceptor belt magazine 4 is new or in its initial stage, no signal is generated from the counter 10, so Tγ21""3
is off and the photoconductor life display LED 12 does not light up either. When the counter 10 reaches a count value of 010000, the A contact of the counter 10 is made, and the A signal is input to the controller 11, which outputs a signal to turn on Tr2, thereby turning on Tr2. Next, when counter 10 reaches 020000, B
When the signal is input, the controller 11 outputs a signal to turn on Tr3, thereby turning on Tr3. Tr2. When Tγ3 is turned on, the current flowing through each semiconductor 13 increases, and the amount of light emitted from the semiconductor laser 13 increases. Next, when the counter 10 reaches 030000, the C contact of the counter 10 is made, a C signal is input to the o-ra 11, and the photoreceptor life display LED 12 lights up.

なおりランター１０のＡ信号、Ｂ信号でＴγ２゜Ｔｒ３
が別々にオンするようにしてもよく、Ｂ信号でＴγ２及
びＴｒ３をオンしてパワーアップしてもよく、又Ａ信号
でＴｒ２がオンし、Ｂ信号でＴｒ３のみがオン、Ｃ信号
でＴｒ２．Ｔｒ３がオンするようにしてもよい。各々の
場合それなりの抵抗値ＲＡ、ＲＢ−を選定する必要があ
り、又トランジスターのオン時のコレクター、エミッタ
電圧と抵抗値ＲＡ、ＲＢを考慮する必要がある。Tγ2°Tr3 at A signal and B signal of Naori lanter 10
may be turned on separately, or the B signal may turn on Tγ2 and Tr3 to power up, or the A signal may turn on Tr2, the B signal may turn on only Tr3, and the C signal may turn on Tr2. Tr3 may be turned on. In each case, it is necessary to select appropriate resistance values RA and RB-, and it is also necessary to consider collector and emitter voltages and resistance values RA and RB when the transistor is on.

又カウンターを画像形成複数回毎にカウント信号を出力
するようにすれば桁数の少ないカウンターを用いて同様
の光量アップを行うことができる。Furthermore, if the counter is configured to output a count signal every time an image is formed, a similar increase in the amount of light can be achieved using a counter with a small number of digits.

又カウンターのリセット釦をオペレーターが感光体交換
毎に外部から押すようにすれば感光体ベルトマガジンで
なく感光体ベルトのみを交換することもできる。Furthermore, if the operator pushes the reset button on the counter from the outside every time the photoreceptor is replaced, only the photoreceptor belt can be replaced instead of the photoreceptor belt magazine.

（効果） 本発明によると感光体に帯電し、レーザー光で露光を行
いトナー画像を形成するようにした電子写真複写機に於
て、画像形成を行う毎にカウントアツプするカウンター
を設け、該カウンターに所定カウント値でオンする複数
個の接点を形成し、該接点に接続された画像形成用のレ
ーザー光のパワー調整用抵抗を変化させる如くなってい
るのでメカニカルなカウンターを用い、レーザー光のパ
ワー調整用抵抗値を変化してパワーアップできるので安
価に光量アップすることができる。(Effects) According to the present invention, in an electrophotographic copying machine in which a photoconductor is charged and exposed to laser light to form a toner image, a counter is provided that counts up each time an image is formed. A mechanical counter is used to adjust the power of the laser beam by forming a plurality of contacts that turn on at a predetermined count value, and changing the resistance connected to the contacts for adjusting the power of the laser beam for image formation. Since the power can be increased by changing the adjustment resistance value, the amount of light can be increased at low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明を施す電子写真複写機の構成概略説明図
、第２図は本発明に用いるカウンターの一実施例正面図
、第３図は第２図の回路図、第７１図は本発明の一実施
例全体回路図である。 １０・・・カラン、Ｊ−１１１・・・コントローラ、１
３・・・半導体レーザー。 第１図 第２図 Ｏ 第４ｒｇＡ ｌFIG. 1 is a schematic explanatory diagram of the structure of an electrophotographic copying machine to which the present invention is applied, FIG. 2 is a front view of an embodiment of a counter used in the present invention, FIG. 3 is a circuit diagram of FIG. 2, and FIG. FIG. 1 is an overall circuit diagram of an embodiment of the invention. 10... Karan, J-111... Controller, 1
3... Semiconductor laser. Figure 1 Figure 2 O 4th rgA l

Claims (1)

【特許請求の範囲】[Claims] 感光体に帯電し、レーザー光で露光を行いトナー画像を
形成するようにした電子写真複写機に於て、画像形成を
行う毎にカウントアップするカウンターを設け、該カウ
ンターに所定カウント値でオンする複数個の接点を形成
し、該接点に接続された画像形成用のレーザー光のパワ
ー調整用抵抗を変化させる如くなした電子写真複写機の
画像形成用レーザー光量調整装置。In an electrophotographic copying machine in which a photoreceptor is charged and exposed to laser light to form a toner image, a counter is provided that counts up each time an image is formed, and the counter is turned on at a predetermined count value. A device for adjusting the amount of laser light for image formation of an electrophotographic copying machine, which has a plurality of contacts and is configured to change a resistance for adjusting the power of the laser light for image formation connected to the contacts.
JP18436484A 1984-09-05 1984-09-05 Laser beam quantity adjusting device for image formation of electrophotographic copying machine Pending JPS6163869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18436484A JPS6163869A (en) 1984-09-05 1984-09-05 Laser beam quantity adjusting device for image formation of electrophotographic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18436484A JPS6163869A (en) 1984-09-05 1984-09-05 Laser beam quantity adjusting device for image formation of electrophotographic copying machine

Publications (1)

Publication Number Publication Date
JPS6163869A true JPS6163869A (en) 1986-04-02

Family

ID=16151939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18436484A Pending JPS6163869A (en) 1984-09-05 1984-09-05 Laser beam quantity adjusting device for image formation of electrophotographic copying machine

Country Status (1)

Country Link
JP (1) JPS6163869A (en)

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