JPS643247B2 - - Google Patents
Info
- Publication number
- JPS643247B2 JPS643247B2 JP54114965A JP11496579A JPS643247B2 JP S643247 B2 JPS643247 B2 JP S643247B2 JP 54114965 A JP54114965 A JP 54114965A JP 11496579 A JP11496579 A JP 11496579A JP S643247 B2 JPS643247 B2 JP S643247B2
- Authority
- JP
- Japan
- Prior art keywords
- document
- cover
- original
- size
- document cover
- 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.)
- Expired
Links
- 230000003595 spectral effect Effects 0.000 claims description 10
- 108091008695 photoreceptors Proteins 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 13
- 239000003086 colorant Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011669 selenium Substances 0.000 description 3
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 229910052711 selenium Inorganic materials 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- GUYIZQZWDFCUTA-UHFFFAOYSA-N (pentadecachlorophthalocyaninato(2-))-copper Chemical compound [Cu+2].N1=C([N-]2)C3=C(Cl)C(Cl)=C(Cl)C(Cl)=C3C2=NC(C2=C(Cl)C(Cl)=C(Cl)C(Cl)=C22)=NC2=NC(C2=C(Cl)C(Cl)=C(Cl)C(Cl)=C22)=NC2=NC2=C(C(Cl)=C(C(Cl)=C3)Cl)C3=C1[N-]2 GUYIZQZWDFCUTA-UHFFFAOYSA-N 0.000 description 1
- 239000005493 Chloridazon (aka pyrazone) Substances 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- WYKYKTKDBLFHCY-UHFFFAOYSA-N chloridazon Chemical compound O=C1C(Cl)=C(N)C=NN1C1=CC=CC=C1 WYKYKTKDBLFHCY-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- VVOLVFOSOPJKED-UHFFFAOYSA-N copper phthalocyanine Chemical compound [Cu].N=1C2=NC(C3=CC=CC=C33)=NC3=NC(C3=CC=CC=C33)=NC3=NC(C3=CC=CC=C33)=NC3=NC=1C1=CC=CC=C12 VVOLVFOSOPJKED-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Landscapes
- Holders For Sensitive Materials And Originals (AREA)
- Control Or Security For Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は、たとえば電子複写機に用いられ、原
稿サイズを検出するための原稿識別方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document identification method used in, for example, an electronic copying machine to detect the document size.
たとえば電子複写機においては、近時その性能
向上が顕著であり、かつ操作上も種々の自動化が
行われている。 For example, electronic copying machines have recently seen remarkable improvements in their performance, and various automations have been implemented in their operations.
原稿のサイズを自動的に識別するとともに自動
露光化が推進されているが、現段階においては
様々の問題に妨げられ完全実用化には至つていな
い。すなわち、そのためには原稿の明るさを検出
しそれに合せて適正な露光量を与えなければなら
ない。この場合に原稿の白地と原稿カバーの反射
率とが略同等であれば何ら問題はないが、原稿と
原稿カバーの反射率が異なる場合には、検出した
明るさがどちらのものであるか、またどちらを基
準にして露光量を設定すれば良いか判断できな
い。つまり測定した原稿面の明るさは原稿と原稿
カバーとの両者を含んだ値であるため、その区分
がなされない限り原稿サイズを検出できないとい
う不都合がある。 Automatic identification of document size and automatic exposure are being promoted, but at this stage various problems have prevented full practical use. That is, for this purpose, it is necessary to detect the brightness of the original and apply an appropriate amount of exposure in accordance with the brightness of the document. In this case, there will be no problem if the white background of the original and the reflectance of the original cover are approximately the same, but if the reflectance of the original and the original cover are different, it is difficult to determine which brightness is detected. Furthermore, it is not possible to determine which reference should be used to set the exposure amount. In other words, since the measured brightness of the document surface includes both the document and the document cover, there is an inconvenience that the document size cannot be detected unless such classification is made.
そこでまず、原稿と原稿カバーとを単純に区別
するために、基本的にはこれらの反射率を異なら
せば光学的に検出できることが考えられる。しか
るにこの場合、種々の原稿が用いられるため反射
率は一定ではなく、原稿カバーの反射率を設定す
る必要がある。ところが原稿カバーの反射率を適
宜設定すると、今度は感光体に対する反射光量が
低下してしまい、複写した電子写真の周縁部が黒
ずんで不鮮明な画像となつてしまう。このため露
光の自動化は実施困難であり、かつ原稿サイズを
検出するには信頼性が低いものであつた。 First, in order to simply distinguish between the document and the document cover, it is possible to optically detect the document and the document cover by basically making their reflectances different. However, in this case, since various originals are used, the reflectance is not constant, and it is necessary to set the reflectance of the original cover. However, if the reflectance of the document cover is set appropriately, the amount of light reflected from the photoreceptor decreases, resulting in darkened edges of the copied electrophotograph, resulting in an unclear image. For this reason, automation of exposure is difficult to implement, and the reliability of detecting the document size is low.
本発明は上記事情に着目してなされたものであ
り、その目的とするところは、原稿のサイズをご
く容易に検出できる原稿識別方法を提供しようと
するものである。 The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a document identification method that allows the size of a document to be detected very easily.
以下本発明の一実施例を図面にもとづいて説明
する。まずはじめに、原稿カバーの反射光のうち
感光体に感度のない光はなくなつても上述のごと
き不都合が生じることはないから、原稿カバーの
分光反射率を極力感光体の反射率に接近すること
により、原稿カバーの反射率変化による感光体へ
の悪影響を防止できることとなる。 An embodiment of the present invention will be described below based on the drawings. First of all, even if some of the light reflected by the document cover to which the photoconductor is not sensitive disappears, the above-mentioned problems will not occur, so the spectral reflectance of the document cover should be made as close to the reflectance of the photoconductor as possible. This makes it possible to prevent adverse effects on the photoreceptor due to changes in the reflectance of the document cover.
たとえば光導電層がセレンである場合の感光体
は、第１図に実線で示すごとく0.6μｍ以下の短
波長側に感度がある。したがつてたとえば実線
で示すような分光反射率を有する原稿カバーを用
いれば良い。この原稿カバーの材質はたとえばポ
リ塩化ビニル、不飽和ポリエステル、ポリウレタ
ン、シリコン樹脂等が用いられる。さらにこれら
材質とのマツチングによつて以下に示す着色剤が
選択される。すなわち、青色として、群青、コバ
ルトブルー、銅フタロシアニンブルー、オイルブ
ルー。縁色としてクロムグリーン、銅フタロシア
ニングリーン。赤色としてカドミウムレツド、マ
ーキユリーレツド、ピラゾンレツドである。なお
これら着色剤は二種以上を混合して調色すること
もできる。 For example, a photoreceptor in which the photoconductive layer is made of selenium has sensitivity on the short wavelength side of 0.6 μm or less, as shown by the solid line in FIG. Therefore, for example, a document cover having a spectral reflectance as shown by the solid line may be used. The material used for this document cover is, for example, polyvinyl chloride, unsaturated polyester, polyurethane, silicone resin, or the like. Furthermore, the following colorants are selected depending on the matching with these materials. That is, the blues include ultramarine, cobalt blue, copper phthalocyanine blue, and oil blue. Chrome green and copper phthalocyanine green as edge colors. The red colors are cadmium red, mercury red, and pyrazone red. Note that two or more of these colorants can also be mixed to adjust the color.
また一般に用いられる白地の原稿の分光反射率
を実線で示す。このように原稿は可視域から近
赤外にまで亘つて略均一な反射特性が現される。 Further, the spectral reflectance of a generally used white original is shown by a solid line. In this way, the original exhibits substantially uniform reflection characteristics from the visible region to the near-infrared region.
このような特性を有する感光体、原稿カバーお
よび原稿を用いて一般的な電子複写機に適用す
る。この電子複写機の原稿載置台は第２図に示す
ようになつている。すなわち、１は透明ガラス材
料からなる原稿台であつて、上記材質および反射
特性の原稿カバーにて覆われる。これら原稿台１
と原稿カバー２との間に上記反射特性の原稿３を
介在させる。この原稿載置台に沿つて検出素子で
あるところのフオトカプラ４が往復動自在に設け
られる。フオトカプラ４は、たとえばGaP、
GaAs、GaAsP等の発光ダイオードが赤や緑の発
光を得られるので使用しやすいが、白熱ランプで
あつても良い発光素子４ａと、CdS、Se、SPD
（シリコンフオトダイオード）等の受光素子４ｂ
とから構成される。また必要に応じて、所望の分
光透過率のフイルタを併用しても良い。このフオ
トカプラ４の波長感度領域は第１図に実線で示
すようになつていて、原稿カバー１２の反射特性
を示す実線が反射しない領域のものが用いられ
る。しかし原稿３の反射特性を示す実線に対し
ては充分に感度のある波長域をカバーしている。 A photoreceptor, document cover, and document having such characteristics are used in a general electronic copying machine. The document mounting table of this electronic copying machine is constructed as shown in FIG. That is, reference numeral 1 denotes a document table made of a transparent glass material, and is covered with a document cover made of the above-mentioned material and having reflective properties. These manuscript tables 1
A document 3 having the above reflection characteristics is interposed between the document cover 2 and the document cover 2. A photocoupler 4, which is a detection element, is provided along the document table so as to be able to move back and forth. The photocoupler 4 is, for example, GaP,
Light-emitting diodes such as GaAs and GaAsP are easy to use because they emit red and green light, but the light-emitting element 4a, which can also be an incandescent lamp, and CdS, Se, and SPD
Light receiving element 4b such as (silicon photodiode)
It consists of Further, a filter having a desired spectral transmittance may be used in combination, if necessary. The wavelength sensitivity range of this photocoupler 4 is as shown by the solid line in FIG. 1, and the wavelength sensitivity range of the photocoupler 4 is used in which the solid line indicating the reflection characteristics of the document cover 12 is not reflected. However, for the solid line representing the reflection characteristics of the original 3, it covers a sufficiently sensitive wavelength range.
なお図示しないが、電子複写機内には複数のサ
イズの記録紙を収容する給紙装置が設けられ、か
つ露光装置その他の周知の複写作用装置が配置さ
れること言う迄もない。 Although not shown in the drawings, it goes without saying that the electronic copying machine is provided with a paper feeder for accommodating recording paper of a plurality of sizes, and is also provided with an exposure device and other well-known copying devices.
しかして、第４図に示すようにプリントボタン
５を押すことにより、複写工程制御回路６が作用
するとともに原稿検知回路を構成するフオトカプ
ラ４が往動して原稿載置台を光走査する。すると
第３図に示すようにフオトカプラ４からの信号出
力は、原稿３のある部分であるｌからｍまでの間
とそれ以外との間で大きく変化する。この結果、
原稿３部分と原稿カバー２部分との区別を光学的
に認識できる。またｌからｍまでの間を原稿３の
濃度検出域として抽出することにより、必要な露
光制御ができる。フオトカプラ４の出力持続時間
をパルスカウンタで計測し、第４図に示すように
原稿サイズ検知回路７にて検出時間から原稿３の
サイズを検知し、予め設定した記録紙サイズの検
知回路８とともに比較照合回路９にて比較照合が
行われる。そしてこの回路９から記録紙サイズの
選択信号が給紙装置駆動回路１０に発せられる。
一方、上記複写工程制御回路６からは給紙タイミ
ング制御回路１１に信号が発せられ、アンドをと
つたとき給紙装置駆動回路１０は選択したサイズ
の記録紙を給出することとなる。また原稿サイズ
に拘りなく、所望の大きさの記録紙を用いる場合
は、マニアルサイズ選択回路１２に切換えれば良
い。 When the print button 5 is pressed as shown in FIG. 4, the copying process control circuit 6 is activated, and the photocoupler 4 constituting the original detection circuit moves forward to optically scan the original table. Then, as shown in FIG. 3, the signal output from the photocoupler 4 changes greatly between a certain part of the document 3 from l to m and other parts. As a result,
The distinction between the third part of the document and the second part of the document cover can be optically recognized. Further, by extracting the area from l to m as the density detection area of the original 3, necessary exposure control can be performed. The output duration of the photocoupler 4 is measured by a pulse counter, and as shown in FIG. 4, the size of the document 3 is detected from the detection time by the document size detection circuit 7, and compared with the detection circuit 8 of the recording paper size set in advance. Comparison and verification are performed in the verification circuit 9. A recording paper size selection signal is then issued from this circuit 9 to a paper feeder drive circuit 10.
On the other hand, the copying process control circuit 6 issues a signal to the paper feed timing control circuit 11, and when the AND is performed, the paper feed device drive circuit 10 feeds the recording paper of the selected size. Furthermore, if a desired size of recording paper is to be used regardless of the document size, it is sufficient to switch to the manual size selection circuit 12.
なおフオトカプラ４の往動時に原稿３のサイズ
と濃度を検出し、往動時に露光しても良い。 Note that the size and density of the document 3 may be detected during the forward movement of the photocoupler 4, and exposure may be performed during the forward movement.
また上記実施例においてはフオトカプラ４を原
稿３の識別と濃度検出とを兼用させたが、これに
限定されるものではなく、それぞれ専用の検出素
子を設けても良く、これらの処理は従来公知の電
子的処理が可能である。 Further, in the above embodiment, the photocoupler 4 is used for both identification of the document 3 and density detection, but the invention is not limited to this. Dedicated detection elements may be provided for each, and these processes can be performed using conventionally known methods. Electronic processing is possible.
また上記実施例においては使用感光体にセレン
を適用したが、これに限定されるものではなく、
他の種類の感光体を用いても良く、このときの分
光反射特性に合せて原稿カバー２の分光反射率を
設定し、検出素子の使用波長を設定すれば、上記
実施例と同様の効果が得られる。また検出素子の
数にも限定されることはなく、複数個用いれば原
稿濃度の測定誤差を少くできる。その他本発明の
要旨を越えない範囲内での種々の変形や応用が可
能である。 Furthermore, in the above embodiments, selenium was applied to the photoreceptor used, but the invention is not limited to this.
Other types of photoreceptors may be used, and the same effect as in the above embodiment can be obtained by setting the spectral reflectance of the document cover 2 and the wavelength used by the detection element according to the spectral reflection characteristics. can get. Further, the number of detection elements is not limited, and if a plurality of detection elements are used, errors in measuring the density of the original can be reduced. Various other modifications and applications are possible within the scope of the invention.
以上説明したように本発明によれば、電子写真
感光体の高感度領域に対応した分光反射率を有す
る原稿カバーにて原稿を覆い、上記原稿カバーの
分光反射率の低い波長領域の光を用いて原稿と原
稿カバーとの識別を光学的に検出するようにした
から、原稿のサイズを容易、かつ正確に検知でき
る。また、原稿を検出してサイズを判定するため
検知自体の信頼性が高く、このため、本などの厚
い物で原稿カバーが浮いた場合でも確実にサイズ
を検出することができるといつた効果を奏する。 As explained above, according to the present invention, a document is covered with a document cover having a spectral reflectance corresponding to a high sensitivity region of an electrophotographic photoreceptor, and light in a wavelength region in which the spectral reflectance of the document cover is low is used. Since the identification between the original and the original cover is optically detected, the size of the original can be detected easily and accurately. In addition, since the size of the document is determined by detecting the document, the detection itself is highly reliable, and this has the effect of being able to reliably detect the size even if the document cover is lifted by a thick object such as a book. play.
第１図は本発明の基本的原理を説明するための
反射特性図、第２図は本発明の一実施例を示す電
子複写機要部の縦断面図、第３図は同じく信号出
力図、第４図は同じく電気ブロツク図である。
２……原稿カバー、３……原稿、４……検出素
子（フオトカプラ）。
FIG. 1 is a reflection characteristic diagram for explaining the basic principle of the present invention, FIG. 2 is a vertical sectional view of the main part of an electronic copying machine showing an embodiment of the present invention, and FIG. 3 is a signal output diagram, FIG. 4 is also an electrical block diagram. 2... Original cover, 3... Original, 4... Detection element (photocoupler).
Claims (1)
反射率を有する原稿カバーにて原稿を覆い、上記
原稿カバーの分光反射率の低い波長領域の光を用
いて原稿と原稿カバーとの識別を光学的に検出す
るようにしたことを特徴とする原稿識別方法。1. Cover the original with a document cover that has a spectral reflectance corresponding to the high-sensitivity region of the electrophotographic photoreceptor, and optically identify the document and the document cover using light in a wavelength region in which the spectral reflectance of the document cover is low. 1. A document identification method characterized by detecting
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11496579A JPS5639555A (en) | 1979-09-07 | 1979-09-07 | Original discrimination method |
| US06/183,408 US4341460A (en) | 1979-09-07 | 1980-09-03 | Electronic copying machine |
| DE3033524A DE3033524C2 (en) | 1979-09-07 | 1980-09-05 | Electrostatic copier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11496579A JPS5639555A (en) | 1979-09-07 | 1979-09-07 | Original discrimination method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61045959A Division JPS61281256A (en) | 1986-03-03 | 1986-03-03 | Electrophotographic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5639555A JPS5639555A (en) | 1981-04-15 |
| JPS643247B2 true JPS643247B2 (en) | 1989-01-20 |
Family
ID=14651009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11496579A Granted JPS5639555A (en) | 1979-09-07 | 1979-09-07 | Original discrimination method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5639555A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01238266A (en) * | 1988-03-18 | 1989-09-22 | Fujitsu Ltd | Automatic transfer system for confidential facsimile |
| JPH01261970A (en) * | 1988-04-13 | 1989-10-18 | Fujitsu Ltd | Confidential transmission file transfer system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5760357A (en) * | 1980-09-26 | 1982-04-12 | Konishiroku Photo Ind Co Ltd | Copying device |
| JPS59184809A (en) * | 1983-04-05 | 1984-10-20 | Fuji Xerox Co Ltd | Original size detecting device of copying machine |
| JPS60260940A (en) * | 1984-06-08 | 1985-12-24 | Fuji Xerox Co Ltd | Device for automatically detecting size of original |
| JPH0652447B2 (en) * | 1984-08-30 | 1994-07-06 | シャープ株式会社 | Magnifying machine |
| JPS6163859A (en) * | 1984-09-04 | 1986-04-02 | Sharp Corp | Copying machine equipped with variable magnification copying specification selection means |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5622424A (en) * | 1979-08-01 | 1981-03-03 | Konishiroku Photo Ind Co Ltd | Original size detecting unit of copying machine |
-
1979
- 1979-09-07 JP JP11496579A patent/JPS5639555A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01238266A (en) * | 1988-03-18 | 1989-09-22 | Fujitsu Ltd | Automatic transfer system for confidential facsimile |
| JPH01261970A (en) * | 1988-04-13 | 1989-10-18 | Fujitsu Ltd | Confidential transmission file transfer system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5639555A (en) | 1981-04-15 |
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