JPS61149943A - Forming device of image - Google Patents

Forming device of image

Info

Publication number
JPS61149943A
JPS61149943A JP27670884A JP27670884A JPS61149943A JP S61149943 A JPS61149943 A JP S61149943A JP 27670884 A JP27670884 A JP 27670884A JP 27670884 A JP27670884 A JP 27670884A JP S61149943 A JPS61149943 A JP S61149943A
Authority
JP
Japan
Prior art keywords
image
original
document
transparent
liquid crystal
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
JP27670884A
Other languages
Japanese (ja)
Inventor
Tomoo Tsunenari
知生 恒成
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP27670884A priority Critical patent/JPS61149943A/en
Publication of JPS61149943A publication Critical patent/JPS61149943A/en
Pending legal-status Critical Current

Links

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  • Holders For Sensitive Materials And Originals (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To obtain a reproduced image having no back copying by arranging a liquid-crystal, constituted so that an area corresponding to a range set to part or the whole of an original is driven a controller, at the side of an original platen cover facing an original platen. CONSTITUTION:A lamp 6 and a mirror 8 are moved as shown by an arrow X and an original image is reflected by the original 7 and mirror 8, reflected by moving mirrors 9 and 11, and further reflected by a fixed mirror 13 through a zoom lens 13, so that the image is projected on a photosensitive drum 15. The electrostatic latent image formed on the drum 15 is transferred to transfer paper. The side of the original platen cover 3 facing original platen glass 2 is composed of a transparent liquid-crystal panel and fixed to a cover back member 17 across a white film 18. The liquid-crystal panel is surrounded with transparent glass 19 and transparent liquid crystal 23 is sandwiched between transparent electrodes 22 and 22. For example, when an image area of A4 size is enlarged and copied to transfer paper of A3 size, only a part 35 of the liquid crystal 23 corresponding to A3 paper size is driven and becomes opaque. Thus, the back copying of a reproduced image is prevented.

Description

【発明の詳細な説明】 産業上の利用分野 〔発明の目的〕 この発明は原稿台上に原稿を置いてその上から原稿カバ
ーで押え、原稿台のガラスを通じて原稿の像を走査する
光学系を備えた画像形成装置に関するものであり、特に
薄手の両面原稿を再生する際に発生しやすい裏面の写り
込みを防止する事を可能にする画像形成装置に関するも
のである。
[Detailed Description of the Invention] Industrial Application Field [Object of the Invention] This invention provides an optical system that places a document on a document table, presses the document cover from above, and scans the image of the document through the glass of the document table. The present invention relates to an image forming apparatus equipped with the present invention, and particularly relates to an image forming apparatus that can prevent reflections on the back side that are likely to occur when reproducing thin double-sided originals.

「従来の技術」 原稿を原稿台カバーにより原稿台に密着させて、原稿台
ガラスを通じて元を照射して光学走査を行う画像形成装
置では通常は再生画償の周辺(原稿の無い箇所)に黒枠
が出来るのを防止する為に原稿台カバーの裏面は白色板
になっている。
``Prior art'' In image forming apparatuses that carry out optical scanning by placing the original in close contact with the original platen using a document platen cover and illuminating the original through the platen glass, a black frame is usually placed around the reproduction image correction area (where there is no original). In order to prevent this from occurring, the back of the document table cover is made of a white plate.

「発明が解決しようとする問題点」 ところがこの構成で両面原稿、特に薄手の両面原稿を再
生すると原稿の裏面側の情報も透きとおって同時に再生
されてしまい(うら写りという)濃度調整を薄目に設定
しなおすし再度操作しなおさなくてはならない事がよく
あった。
``Problem that the invention seeks to solve'' However, when a double-sided document, especially a thin double-sided document, is reproduced with this configuration, the information on the back side of the document is also reproduced clearly (referred to as back-printing), and the density adjustment is set to a light value. I often had to redo the operation again.

本発明は上述の如き従来例の欠点を解決し、薄手の両面
原稿でもうら写りの無い鮮明なコピーを可能にしだ画像
形成装置を提供することを目的とするものである。
SUMMARY OF THE INVENTION It is an object of the present invention to provide an image forming apparatus which solves the above-mentioned drawbacks of the prior art and enables clear copies without blur even of thin double-sided originals.

〔発明の構成〕[Structure of the invention]

「問題点を解決するための手段」 この発明は原稿台上に載置された原稿を覆う原稿台カバ
ーを有する画像形成装置であって、原稿の一部もしくは
全部に設定した範囲に対応する領域が制御装置により駆
動されるように構成された液晶ノ々ネルが、原稿台カバ
ーの原稿台に面する側に配置された事を特徴とする画像
形成装置である。
"Means for Solving the Problems" The present invention provides an image forming apparatus having a document table cover that covers a document placed on a document table, and the image forming apparatus has an area corresponding to a range set in part or all of the document. The image forming apparatus is characterized in that a liquid crystal display panel configured to be driven by a control device is disposed on the side of the document table cover facing the document table.

「作用」 複写するに際し、制御装置の操作により原稿複写可能領
域を含む範囲は液晶パネルが駆動される。走査光は薄手
原稿を照射して、大部分はそのま\反射する。そして薄
手原稿の裏側の原稿面に達した一部照射元は液晶パネル
の駆動面が元を殆んど反射しないので原稿裏面の原稿像
は走査によって得られずうら写りがしない。
"Operation" When copying, the liquid crystal panel is driven in a range including the original copyable area by operation of the control device. The scanning light illuminates the thin original, and most of it is reflected as is. Since the drive surface of the liquid crystal panel hardly reflects the part of the irradiation source that has reached the document surface on the back side of the thin document, the document image on the back surface of the document cannot be obtained by scanning, and there is no back image.

「実施例」 以下本発明の実施例を図面に従って説明する。"Example" Embodiments of the present invention will be described below with reference to the drawings.

第1図は電子複写装置の斜視図である。lは複写装置本
体、コは複写装置本体l上面に設けられた原稿台ガラス
、3は原稿台ガラココに面する側が液晶パネルから成る
原稿台゛カバー、ダは複写装置本体lに設けた操作パネ
ル、5は操作パネル中のスタートキーである〇 第一図&i第1図の縦断面で見る光学系の側面図である
。ランプ6および#、lミラーjが一体的に矢印X方向
(原稿走査方向)に移動すると原稿像は原稿り、第1ミ
ラーtにて反射し、一体的に第1ミラーざのl/コの速
度で同方向に移動する第1ミラーtおよびMJミラーl
/により反射され、さらにズームレンズlコを透過させ
、固定ミラー/Jにて更に反射した原稿像はスリットl
IIを通じランプ6の移動と同期して回転する感光ドラ
ム/3に投射し、感光ドラムisを躇光して、原稿画像
の静電潜像を感光ドラム13に形成する。感光ドラムl
!の周囲に感光系線光を除く不図示の電子写真工程を行
う装置があり、給紙された転写紙に画像が再生される。
FIG. 1 is a perspective view of an electronic copying apparatus. 1 is the main body of the copying machine, 1 is the document glass provided on the top of the main body of the copying machine, 3 is the document table cover whose side facing the glass plate is a liquid crystal panel, and 1 is an operation panel provided on the main body of the copying machine. , 5 is a start key in the operation panel. 〇 Figure 1 & i is a side view of the optical system seen in the vertical section of Figure 1. When the lamp 6 and the # and l mirrors j move together in the direction of the arrow X (original scanning direction), the original image is reflected by the first mirror t, and is integrally moved from the first mirror to the l/co. First mirror t and MJ mirror l moving in the same direction at speed
The original image reflected by /, further transmitted through zoom lens l, and further reflected by fixed mirror /J is passed through slit l.
The electrostatic latent image of the document image is formed on the photosensitive drum 13 by projecting the image onto the photosensitive drum /3 which rotates in synchronization with the movement of the lamp 6 through II, and by illuminating the photosensitive drum is. photosensitive drum l
! There is a device (not shown) that performs an electrophotographic process (not shown) in the vicinity of which removes the photosensitive line light, and an image is reproduced on the fed transfer paper.

原稿台ガラココは第3図に示すように例えばJI8規格
のAJサイズの転写シートな載置できる大きさとなって
おり、左上隅のoy原点に位置な定めるようになってい
る。
As shown in FIG. 3, the original platen is large enough to place, for example, an AJ size transfer sheet of the JI8 standard, and is positioned at the oy origin in the upper left corner.

第弘図は原稿台カバー3の縦断面図である。Figure 3 is a longitudinal sectional view of the document table cover 3.

原稿台カバーの原稿台ガラココに面する側は透明液晶パ
ネルで構成され、原稿台カバー背部材/?に白色膜it
を介して固着している。透明液晶)4ネルは透明ガラス
19に囲まれていて、透明配線部−7,コlを有する透
明電極ココ。
The side of the document cover that faces the document glass glass is made up of a transparent liquid crystal panel, and the document platen cover back member/? white film on it
It is fixed through. Transparent liquid crystal) 4th channel is surrounded by transparent glass 19, and has transparent electrodes 7 and 1 with transparent wiring parts.

ココに挾まれて、透明液晶コ3が蓄えられている。A transparent liquid crystal display 3 is stored here.

−qは演算回路、Sはスタートキー、ユSは給紙カセッ
トに設けられた紙形識別装置、コロは変倍率識別装置で
ある。
-q is an arithmetic circuit, S is a start key, S is a paper type identification device provided in the paper feed cassette, and KO is a magnification ratio identification device.

第3図に示すように、給紙カセット箱体λ7の電子複写
機本体に挿入する側の側壁に給紙カセットの紙形識別装
置コ!が固定されていて、紙形識別装置コ!は長方形の
突起の外端面の両側にカセット側接点−jが設けてあり
、両接点Jff 、2gの間はそのカセットに固有の抵
抗−デを介して連結されている。
As shown in FIG. 3, a paper type identification device for the paper feed cassette is attached to the side wall of the paper feed cassette box λ7 on the side to be inserted into the electronic copying machine main body. is fixed, and the paper type identification device! A cassette side contact -j is provided on both sides of the outer end surface of a rectangular projection, and both contacts Jff and 2g are connected via a resistor -D specific to the cassette.

電子複写装置本体ノの凹部31が設けられていて、給紙
カセット箱体コクの突起(不図示)が電子複写装置本体
の該凹部に挿入されて固定されると、凹部31に設けら
れた接点3ユ、3コに接点コg、2Kが当接するように
なっている。
A recess 31 is provided in the main body of the electronic copying device, and when a protrusion (not shown) on the body of the paper feed cassette box body is inserted and fixed into the recess in the main body of the electronic copying device, the contact provided in the recess 31 Contacts g and 2K come into contact with 3u and 3.

接点コj、コtにより演算回路コクに給紙カセット毎に
異なる信号電圧を加えろようになっている。第6図に示
すようにズームレンズlコの可動部を支持する部材にポ
テンショメータ33の駆動側が連結されており、4テン
シヨメータ33の抵抗疋よる変倍率識別装置コ1を介し
て信号が演算回路コクに送られるようになっている。
Different signal voltages can be applied to each paper feed cassette to the arithmetic circuit through contacts J and T. As shown in FIG. 6, the drive side of the potentiometer 33 is connected to a member that supports the movable part of the zoom lens 1, and a signal is sent to the arithmetic circuit via the magnification ratio identification device 1 based on the resistance of the four tensiometers 33. It is now sent to

紙形識別装置コよと変倍率識別装置コロとから送られて
来る信号により、第グ図の演算回路・−Vは透明1’l
t極の駆動回路Jダを介して透明電極ニーに仕組まれた
ノ9ターンの電圧印加を行い、透明1!極コ2.コニに
対向する透明液晶ユ3は濁って、原稿台ガラココ、原稿
7、原稿側の透明ガラス/9の透明電極22を通じて来
る光源乙の光を白色膜1gへ透さない。
By the signals sent from the paper type identification device Koyo and the variable magnification discrimination device Koro, the arithmetic circuit -V in Fig.
Through the t-pole drive circuit J da, voltage is applied to the transparent electrode knee with nine turns, and the transparent 1! Extreme 2. The transparent liquid crystal unit 3 facing the camera becomes cloudy and does not allow the light from the light source B to pass through the glass platen, the original 7, and the transparent electrode 22 of the transparent glass/9 on the original side to the white film 1g.

上記構成においてAJサイズの転写紙に所望する画像領
域AIIサイズ大だけを拡大して複写する場合を想定す
る。第7図のフローチャートに示すように電源が挿入さ
れるとまずステップlでコピースタートキー5が押され
ると演算回路−ダは附勢され、ステップコでは紙形識別
装置コ!からの信号により紙サイズデータが演算回路コ
グに読込まれる。ステップJで変倍つまみを操作すると
ズームレンズノコは所要変倍率となるように移動し、ポ
テンショメータ33で得られた倍率は演算回路コダに読
込まれる。ステップダで実際の複写可能領域(コピーエ
リア)を算出しステップ3でその領域に応じた部分の液
晶ノ4ネルの透明液晶コjtc[動信号を送る。
In the above configuration, it is assumed that only a desired image area AII size is enlarged and copied onto AJ size transfer paper. As shown in the flowchart of FIG. 7, when the power supply is inserted, the copy start key 5 is pressed in step 1, the arithmetic circuit is energized, and the paper type identification device is activated in step l. The paper size data is read into the arithmetic circuit cog by the signal from. When the variable magnification knob is operated in step J, the zoom lens saw is moved to obtain the desired variable magnification, and the magnification obtained by the potentiometer 33 is read into the arithmetic circuit Koda. Step 3 calculates the actual copyable area (copy area), and step 3 sends a moving signal to the transparent liquid crystal display of the liquid crystal channel 4 corresponding to the area.

かくして第1図に示すように液晶コJは紙サイズAII
の部分SS(交叉斜線の断面線で示す)が不透明となる
Thus, as shown in Figure 1, the liquid crystal display is paper size AII.
The portion SS (indicated by the cross-sectional lines) becomes opaque.

尚上述の実施例は変倍率に応じた原稿の大きさと転写紙
の大きさを関係づけたので実際の電子複写装置の変倍操
作ぎタンによる制御装置に適合するが、変倍率に関係な
く、原稿の大きさを人力する操作ビタ/により該原稿に
対応した液晶tX−111K Ili’/+する制御装
置としてもよい。
The above-mentioned embodiment relates the size of the original and the size of the transfer paper according to the magnification ratio, so it is compatible with the control device using the magnification control button of an actual electronic copying device, but regardless of the magnification ratio, The control device may also be used to control the size of the document by manually controlling the size of the document.

実施例は電子複写装置についてのべたが本発明は原稿と
原稿を再現する如何なる画像形成装置例えば記鎌装置、
ファクシミIJ、レーデ複写機等を含むことはいうまで
もない処である。
Although the embodiments have been described with respect to an electronic copying device, the present invention can be applied to a document and any image forming device that reproduces the document, such as a recording device,
Needless to say, this includes facsimile IJ, radar copying machines, etc.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明は原稿台上に原稿を載置し
て原稿カバーにより押えて画像再生を行うようにした画
像形成装置において、原稿台カバーの原稿台ガラスに対
面する側に透明液晶/4ネルを構成すると共に、設定し
た原稿中の一部もしくは全部の範囲に対応する領域が電
動される制一手段を設けたもので、原稿の画像再生領域
裏面に黒い紙をおいて光学走査したのと同じ効果を自動
的に得る事ができ、うら写りのない再生画像が可能にな
る。
As described above, the present invention provides an image forming apparatus in which an original is placed on a document table and pressed by a document cover to reproduce an image, and a transparent liquid crystal display is provided on the side of the document table cover facing the document table glass. This system consists of 4 channels and is equipped with a control means to electrically control a region corresponding to part or all of the set range in the document.A black paper is placed on the back side of the image reproduction area of the document and optical scanning is performed. You can automatically obtain the same effect as before, making it possible to reproduce images with no shadows.

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

第1図は本発明の実施例か示す電子複写装置の斜視図、
第一図は第7図の光学系の側面図、第3図は原稿台ガラ
スの平面図、第弘図は原稿台カバーの縦断面図、第5図
は紙形識別装置を示す斜視図、第6因は変倍率識別装置
の説明図、第7図、は原稿台カバー作動のフローチャ−
トである。 コ・・・原稿台ガラス 3・・・原稿台カバー コJ・
・・透明液晶 コダ・・・演算回路 2よ・・・紙形識
別装置 コロ・・・変倍率識別装置。 特許出願人  キャノン株式会社 代堺人 新井一部 手続補正書(方式) 昭和60年j月lO日 昭和!を年特許願第271,701、 発明の名称 画像形成装装置 J補正をする者 事件との関係  特許出願人 名称 キャノン株式会社 カ  り リュウデグロウ 代表者賀 来龍三部 病代 理 人 〒2ダ7電話Oダ!r−t 9 /−り
qtg昭和昭和6ダ 4補正の対象 明細書の発明の詳細な説明の欄 り補正の内容 明細書第1頁//行目「形成装置。」 の次に改行し項
目「1発明の詳細な説明」を加入する。
FIG. 1 is a perspective view of an electronic copying apparatus showing an embodiment of the present invention;
Figure 1 is a side view of the optical system in Figure 7, Figure 3 is a plan view of the document table glass, Figure 3 is a longitudinal sectional view of the document table cover, and Figure 5 is a perspective view showing the paper type identification device. The sixth factor is an explanatory diagram of the magnification ratio identification device, and FIG. 7 is a flowchart of the operation of the document platen cover.
It is. Co...Original platen glass 3...Document platen cover CoJ.
...Transparent liquid crystal Koda...Arithmetic circuit 2...Paper shape identification device Coro...Magnification ratio identification device. Patent Applicant Canon Co., Ltd. Sakaijin Arai Partial Procedural Amendment (Method) June 1985 IO Day Showa! Patent Application No. 271,701, Name of Invention Image Forming Device J Amended Person's Case Name of Patent Applicant Name of Canon Co., Ltd. Kari Ryudegrow Representative Kari Ryu Sanbe Illness Agent Address: 2 Da 7 Telephone: Oda! r-t 9 /-ri qtg 1933/1933 Detailed explanation of the invention in the specification subject to the 4th amendment Contents of the amendment Page 1//Line ``Forming device.'' Next to line break item Add "1 Detailed Description of the Invention".

Claims (1)

【特許請求の範囲】[Claims] 1、原稿台上に載置された原稿を覆う原稿台カバーを有
する画像形成装置であつて、原稿の一部もしくは全部に
設定した範囲に対応する領域が制御装置により駆動され
るように構成された液晶パネルが、原稿台カバーの原稿
台に面する側に配置された事を特徴とする画像形成装置
1. An image forming apparatus having a document table cover that covers a document placed on a document table, and configured such that an area corresponding to a range set on a part or all of the document is driven by a control device. An image forming apparatus characterized in that a liquid crystal panel is arranged on a side of a document table cover facing the document table.
JP27670884A 1984-12-25 1984-12-25 Forming device of image Pending JPS61149943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27670884A JPS61149943A (en) 1984-12-25 1984-12-25 Forming device of image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27670884A JPS61149943A (en) 1984-12-25 1984-12-25 Forming device of image

Publications (1)

Publication Number Publication Date
JPS61149943A true JPS61149943A (en) 1986-07-08

Family

ID=17573216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27670884A Pending JPS61149943A (en) 1984-12-25 1984-12-25 Forming device of image

Country Status (1)

Country Link
JP (1) JPS61149943A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903078A (en) * 1988-04-07 1990-02-20 Eastman Kodak Company Imaging apparatus with variable aperture platen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903078A (en) * 1988-04-07 1990-02-20 Eastman Kodak Company Imaging apparatus with variable aperture platen

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