JP2000106617A - Reader and reading system - Google Patents
Reader and reading systemInfo
- Publication number
- JP2000106617A JP2000106617A JP10275472A JP27547298A JP2000106617A JP 2000106617 A JP2000106617 A JP 2000106617A JP 10275472 A JP10275472 A JP 10275472A JP 27547298 A JP27547298 A JP 27547298A JP 2000106617 A JP2000106617 A JP 2000106617A
- Authority
- JP
- Japan
- Prior art keywords
- photoelectric conversion
- reading device
- light emitting
- emitting element
- conversion element
- 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.)
- Withdrawn
Links
Landscapes
- Solid State Image Pick-Up Elements (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Facsimile Heads (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ファクシミリやス
キャナーなど、原稿に描かれた文字や画像を電気信号に
変換し、処理する機器（以下、画像処理機器という）に
用いる光電変換装置に関し、特に結像レンズを用いない
原稿密着型の読取装置および読取システムに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoelectric conversion device used in a device such as a facsimile or a scanner that converts characters or images drawn on a document into an electric signal and processes the signal (hereinafter referred to as an image processing device). The present invention relates to a document-contact type reading device and a reading system that do not use an imaging lens.
【０００２】[0002]
【従来の技術】画像処理機器において、主として紙の原
稿に描かれた画像を電気信号に変換する手段としては、
微細な光電変換素子を多数直線状、かつ等間隔に配列し
たラインセンサに画像を光学的に投影し、原稿を光電変
換素子の配列とは垂直の方向に走査しながら順次電気信
号を取り出す方法が一般的である。さらに、ラインセン
サに原稿の画像を投影する方式には、大別して二つあ
る。即ち、 従来例（１）原稿をランプなどで照明し、結像レンズを
用いて画像を投影する方式、 従来例（２）結像レンズは用いず、原稿とラインセンサ
を近接して配置し、原稿からの反射光、又は透過光を光
電変換素子に導く方式、の二つである。2. Description of the Related Art In image processing equipment, means for converting an image drawn mainly on a paper document into an electric signal includes:
A method of optically projecting an image on a line sensor in which a large number of fine photoelectric conversion elements are arranged in a straight line and at equal intervals, and sequentially taking out an electric signal while scanning the original in a direction perpendicular to the arrangement of the photoelectric conversion elements. General. Furthermore, there are roughly two types of methods for projecting an image of a document onto a line sensor. That is, the conventional example (1) a method in which a document is illuminated with a lamp or the like and an image is projected using an image forming lens, and the conventional example (2) a document and a line sensor are arranged close to each other without using an image forming lens, A method of guiding reflected light from a document or transmitted light to a photoelectric conversion element.
【０００３】従来例（２）の場合では原稿と光電変換素
子との間隔を、光電変換素子の配列ピッチと同程度か、
それ以下にすることが望ましい。例えば配列ピッチが１
２５マイクロメートルの場合（これは１インチ当り２０
０画素に相当する）、原稿と光電変換素子との間隔を６
０マイクロメートル程度にすることが行われている。フ
ァクシミリのように、多くは不透明な紙に描かれた画像
を読み取る場合、原稿を照明する光は、前記光電変換素
子と原稿との間から入射する必要がある。このため、光
電変換素子は透明なガラス基板上に形成し、このガラス
基板越しに照明することが行われている。In the case of the conventional example (2), whether the distance between the original and the photoelectric conversion element is substantially equal to the arrangement pitch of the photoelectric conversion elements,
It is desirable to make it less. For example, the arrangement pitch is 1
For 25 micrometers (this is 20
0), and the distance between the original and the photoelectric conversion element is 6
It has been practiced to make it about 0 micrometers. When reading an image drawn on a mostly opaque paper like a facsimile, light for illuminating the original needs to be incident between the photoelectric conversion element and the original. For this reason, the photoelectric conversion element is formed on a transparent glass substrate, and illumination is performed through the glass substrate.
【０００４】[0004]
【発明が解決しようとする課題】上述の如く、従来例
（２）の場合の結像レンズを用いないラインセンサで
は、原稿からラインセンサまでの距離を極めて小さくで
き、画像処理機器をコンパクトに構成できるという利点
がある。しかしながら、図３に示すように光源１６０に
キセノン管、冷陰極管、或いはＬＥＤランプなどを用い
ると、これら光源がラインセンサ本体に比べて大きく、
画像処理機器全体の大きさ、質量、さらには製造コスト
の削減に限界があった。As described above, in the line sensor using no imaging lens in the case of the conventional example (2), the distance from the document to the line sensor can be extremely reduced, and the image processing apparatus can be made compact. There is an advantage that you can. However, when a xenon tube, a cold cathode tube, or an LED lamp is used for the light source 160 as shown in FIG. 3, these light sources are larger than the line sensor main body,
There has been a limit in reducing the size, mass, and manufacturing cost of the entire image processing device.
【０００５】これを解決すべく、光源にＥＬ素子を用い
た構成も提案されている（例えば、公開特許公報 平０
５−０６３８９７号）が、これには交流点灯のための駆
動回路が別途必要であり、画像処理機器の小型化には限
界があった。In order to solve this problem, a configuration using an EL element as a light source has been proposed (for example, Japanese Patent Application Laid-Open Publication No.
However, this requires a separate driving circuit for AC lighting, and there is a limit to miniaturization of image processing equipment.
【０００６】本発明はこのような問題に鑑みてなされた
もので、特別な交流点灯回路を必要とせず、簡単な直流
点灯ができ、小型化した読取装置および読取システムを
提供することを目的とするものである。The present invention has been made in view of such a problem, and an object of the present invention is to provide a reading device and a reading system which can perform a simple DC lighting without requiring a special AC lighting circuit and can be reduced in size. Is what you do.
【０００７】[0007]
【課題を解決するための手段】前記目的を達成するため
に、本発明では、読取装置を次の（１）〜（７）のとお
りに、読取装置を備えた読取システムを（８），（９）
のとおりに構成する。In order to achieve the above-mentioned object, according to the present invention, a reading system having a reading device is provided by the following (1) to (7). 9)
Configure as follows.
【０００８】（１）透明基板の一方の面に形成した光電
変換素子と、前記透明基板の他方の面に形成した発光素
子とを備えた読取装置。(1) A reading device comprising a photoelectric conversion element formed on one surface of a transparent substrate and a light emitting element formed on the other surface of the transparent substrate.
【０００９】（２）前記（１）記載の読取装置におい
て、前記光電変換素子を複数個直線状にほぼ等間隔に配
列した読取装置。(2) The reader according to (1), wherein a plurality of the photoelectric conversion elements are linearly arranged at substantially equal intervals.
【００１０】（３）前記（１）記載の読取装置におい
て、前記光電変換素子にアモルファスシリコン半導体を
用いた読取装置。(3) The reader according to (1), wherein the photoelectric conversion element uses an amorphous silicon semiconductor.
【００１１】（４）前記（１）記載の読取装置におい
て、前記発光素子に有機ＬＥＤを用いた読取装置。(4) The reader according to the above (1), wherein an organic LED is used as the light emitting element.
【００１２】（５）前記（１）記載の読取装置におい
て、前記発光素子を赤，緑および青の３個の発光部によ
って構成した読取装置。(5) The reading device according to the above (1), wherein the light emitting element is constituted by three light emitting portions of red, green and blue.
【００１３】（６）前記（１）記載の読取装置におい
て、前記発光素子から発した光が、前記透明基板を通し
て前記透明基板の他方の面に設けた原稿の表面で反射し
て、前記光電変換素子に入射するように、前記発光素
子，前記光電変換素子および前記透明基板をそれぞれ配
置した読取装置。(6) In the reading device according to the above (1), the light emitted from the light emitting element is reflected by the surface of a document provided on the other surface of the transparent substrate through the transparent substrate, and the photoelectric conversion is performed. A reading device in which the light emitting element, the photoelectric conversion element, and the transparent substrate are arranged so as to be incident on the element.
【００１４】（７）前記（１）記載の読取装置におい
て、前記透明基板の一方の面に形成した前記光電変換素
子の表面を覆うように、平らな外面部をもち透明性のあ
る形成層を備えた読取装置。(7) In the reader according to (1), a transparent forming layer having a flat outer surface portion and covering the surface of the photoelectric conversion element formed on one surface of the transparent substrate is provided. Reading device provided.
【００１５】（８）前記（１）〜（７）のいずれかに記
載した読取装置を備えた読取システム。(8) A reading system including the reading device according to any one of (1) to (7).
【００１６】（９）前記（５）記載の読取装置に、赤，
緑および青の３個の前記発光部を順次点灯させる点灯駆
動手段を備えた読取システム。(9) The reading device according to (5),
A reading system comprising lighting drive means for sequentially lighting the three light emitting units of green and blue.
【００１７】[0017]
【発明の実施の形態】以下本発明の実施の形態を読取装
置の実施例により説明する。なお本発明は読取装置に限
らず、読取装置を備えた読取システムの形で同様に実施
することができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to examples of a reading device. The present invention is not limited to a reading device, and can be similarly implemented in the form of a reading system including a reading device.
【００１８】[0018]
【実施例】（実施例１）図１は実施例１を示す読取装置
の断面図である。FIG. 1 is a sectional view of a reading apparatus according to a first embodiment.
【００１９】１００は透明なガラス基板、１１０はアモ
ルファスシリコンからなる光電変換素子、１２０は開口
部、１３０は保護層、１４０は固体発光素子、１４５は
固体発光素子１４０の保護層である。これらは紙面と垂
直方向に配列したラインセンサを構成する。Reference numeral 100 denotes a transparent glass substrate, 110 denotes a photoelectric conversion element made of amorphous silicon, 120 denotes an opening, 130 denotes a protective layer, 140 denotes a solid-state light emitting element, and 145 denotes a protective layer of the solid-state light emitting element 140. These constitute line sensors arranged in a direction perpendicular to the paper surface.
【００２０】原稿２００は、読み取るべき画像の描かれ
た表面を前記光電変換素子１１０と相対する側に向け、
保護層１３０と接しながら不図示の機構によって紙面と
平行な方向２０１に送られる。この送りによって、前記
ラインセンサは原稿の画像を走査することができる。The original 200 has the surface on which the image to be read is drawn facing the photoelectric conversion element 110,
While being in contact with the protective layer 130, the paper is sent in a direction 201 parallel to the paper by a mechanism (not shown). By this feeding, the line sensor can scan the image of the document.
【００２１】固体発光素子１４０は、ガラス基板１００
上にＩＴＯ（酸化インジウムスズ）などの薄膜からなる
透明な陽極１４１，ホール輸送層１４２，電子注入層１
４３，アルミニウムなどの金属膜からなる陰極１４４を
順次積層した有機ＬＥＤであり、その周囲は不透湿の保
護層１４５により覆われている。The solid-state light-emitting device 140 is formed on the glass substrate 100.
A transparent anode 141 made of a thin film such as ITO (indium tin oxide), a hole transport layer 142, and an electron injection layer 1 are formed thereon.
43, an organic LED in which cathodes 144 made of a metal film such as aluminum are sequentially laminated, and the periphery thereof is covered with a moisture-impermeable protective layer 145.
【００２２】陽極１４１と陰極１４４間に印加された電
流により発生した光線２１０は、陽極１４１とガラス基
板１００、さらには開口部１２０，保護層１３０を透過
して原稿２００の表面で反射し、光電変換素子１１０に
到達する。The light 210 generated by the current applied between the anode 141 and the cathode 144 passes through the anode 141 and the glass substrate 100, further passes through the opening 120 and the protective layer 130, is reflected on the surface of the original 200, and It reaches the conversion element 110.
【００２３】ここで、原稿２００から光電変換素子１１
０までの距離を、光電変換素子１１０の配列ピッチに比
べ充分小さくすることで、結像レンズを用いなくても、
原稿２００の画像濃淡に対応した光を光電変換素子１１
０に到達させ、原稿２００の画像情報を光電変換するこ
とができる。Here, from the original 200, the photoelectric conversion element 11
By making the distance to 0 sufficiently smaller than the array pitch of the photoelectric conversion elements 110, even without using an imaging lens,
The light corresponding to the image density of the original 200 is converted to the photoelectric conversion element 11.
Thus, the image information of the document 200 can be photoelectrically converted.
【００２４】光電変換素子１１０は、ガラス基板１００
上に、固体発光素子１４０とは反対の表面に形成する必
要があるため、アモルファスシリコン半導体を用いるの
が適当である。これは、クロムなどの遮光層１１１，窒
化シリコンなどの絶縁層１１２，半導体層１１３，ドー
ピング半導体層１１４，アルミニウムなどからなる主電
極１１５からなる。The photoelectric conversion element 110 is a glass substrate 100
In addition, it is necessary to form an amorphous silicon semiconductor on the surface opposite to the solid-state light-emitting element 140, and thus it is appropriate to use an amorphous silicon semiconductor. It comprises a light-shielding layer 111 such as chromium, an insulating layer 112 such as silicon nitride, a semiconductor layer 113, a doped semiconductor layer 114, and a main electrode 115 made of aluminum or the like.
【００２５】（実施例２）図２は実施例２を示す読取装
置の断面図である。(Embodiment 2) FIG. 2 is a sectional view of a reading apparatus according to Embodiment 2.
【００２６】固体発光素子１４０は、それぞれ赤，緑，
青の三色に発光する部分１５１，１５２，１５３に分か
れて配置される。三色を順次点灯させる点灯駆動手段を
設けて、原稿の同一個所を照明することにより画像を三
色分解し、カラー画像を得ることができ、カラー画像の
読取システムが実現できる。The solid state light emitting devices 140 are red, green,
The parts are divided into portions 151, 152, and 153 that emit light of three colors of blue. A lighting drive unit for sequentially lighting the three colors is provided, and by illuminating the same portion of the document, the image can be separated into three colors to obtain a color image, and a color image reading system can be realized.
【００２７】以上説明したように、前記実施例によれ
ば、ラインセンサを光源と一体化し、実用上はガラス板
１００と同等の厚みにまで、極めて薄く形成することが
できる。As described above, according to the above embodiment, the line sensor is integrated with the light source, and can be formed to be extremely thin to a thickness equivalent to the glass plate 100 in practical use.
【００２８】さらに、固体発光素子１４０と、光電変換
素子１１０とが同一のガラス基板１００上に形成した固
体素子であるため、製造工程を短縮でき、装置の信頼性
も向上する。固体発光素子１４０に、赤，緑および青を
発光する３個の素子を用いれば読取装置のカラー化が実
現できる。Further, since the solid-state light-emitting element 140 and the photoelectric conversion element 110 are solid-state elements formed on the same glass substrate 100, the manufacturing process can be shortened and the reliability of the device can be improved. If three elements that emit red, green, and blue light are used as the solid-state light emitting elements 140, colorization of the reading device can be realized.
【００２９】また、固体発光素子１４０を有機ＬＥＤと
したことで、駆動のための電気回路は交流点灯にする必
要がなく、直流点灯による簡略化ができる。Further, since the solid-state light-emitting element 140 is an organic LED, the electric circuit for driving does not need to be turned on by AC, and can be simplified by DC lighting.
【００３０】これらの効果により、より小型で安価な光
源一体化した読取装置が実現でき、この装置を用いてコ
ンパクトな読取システムを提供することができる。With these effects, it is possible to realize a smaller and less expensive reading device integrated with a light source, and it is possible to provide a compact reading system using this device.
【００３１】[0031]
【発明の効果】以上説明したように、本発明によれば、
透明基板１００に固体発光素子１４０と光電変換素子１
１０を一体化して構成することにより、直流点灯がで
き、小型で安価な読取装置が可能となり、又この装置を
用いたコンパクトな読取システムを提供することができ
る。As described above, according to the present invention,
A solid light emitting element 140 and a photoelectric conversion element 1 are provided on a transparent substrate 100.
By integrally configuring 10, a small-sized and inexpensive reading device can be provided, and a compact reading system using this device can be provided.
【図１】 実施例１を示す読取装置の断面図FIG. 1 is a cross-sectional view of a reading apparatus according to a first embodiment.
【図２】 実施例２を示す読取装置の断面図FIG. 2 is a sectional view of a reading apparatus according to a second embodiment.
【図３】 従来の読取装置の断面図FIG. 3 is a sectional view of a conventional reader.
１００ ガラス基板 １１０ 光電変換素子 １４０ 固体発光素子 ２００ 原稿 ２１０ 光線 REFERENCE SIGNS LIST 100 glass substrate 110 photoelectric conversion element 140 solid state light emitting element 200 original 210 light ray
Claims (9)
素子と、前記透明基板の他方の面に形成した発光素子と
を備えたことを特徴とする読取装置。1. A reading device comprising: a photoelectric conversion element formed on one surface of a transparent substrate; and a light emitting element formed on the other surface of the transparent substrate.
光電変換素子を複数個直線状にほぼ等間隔に配列したこ
とを特徴とする読取装置。2. The reader according to claim 1, wherein a plurality of said photoelectric conversion elements are linearly arranged at substantially equal intervals.
光電変換素子にアモルファスシリコン半導体を用いたこ
とを特徴とする読取装置。3. The reading device according to claim 1, wherein an amorphous silicon semiconductor is used for the photoelectric conversion element.
発光素子に有機ＬＥＤを用いたことを特徴とする読取装
置。4. The reading device according to claim 1, wherein an organic LED is used as the light emitting element.
発光素子を赤，緑および青の３個の発光部によって構成
したことを特徴とする読取装置。5. The reading device according to claim 1, wherein said light emitting element is constituted by three light emitting units of red, green and blue.
発光素子から発した光が、前記透明基板を通して前記透
明基板の他方の面に設けた原稿の表面で反射して、前記
光電変換素子に入射するように、前記発光素子，前記光
電変換素子および前記透明基板をそれぞれ配置したこと
を特徴とする読取装置。6. The reading device according to claim 1, wherein light emitted from the light emitting element is reflected by the surface of a document provided on the other surface of the transparent substrate through the transparent substrate, and is reflected on the photoelectric conversion element. The reading device, wherein the light emitting element, the photoelectric conversion element, and the transparent substrate are arranged so as to be incident.
透明基板の一方の面に形成した前記光電変換素子の表面
を覆うように、平らな外面部をもち透明性のある形成層
を備えたことを特徴とする読取装置。7. The reading device according to claim 1, further comprising a transparent forming layer having a flat outer surface portion so as to cover a surface of the photoelectric conversion element formed on one surface of the transparent substrate. A reading device characterized by the above-mentioned.
装置を備えたことを特徴とする読取システム。8. A reading system comprising the reading device according to claim 1.
び青の３個の前記発光部を順次点灯させる点灯駆動手段
を備えたことを特徴とする読取システム。9. The reading system according to claim 5, further comprising lighting drive means for sequentially lighting the three light emitting units of red, green and blue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10275472A JP2000106617A (en) | 1998-09-29 | 1998-09-29 | Reader and reading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10275472A JP2000106617A (en) | 1998-09-29 | 1998-09-29 | Reader and reading system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000106617A true JP2000106617A (en) | 2000-04-11 |
Family
ID=17556019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10275472A Withdrawn JP2000106617A (en) | 1998-09-29 | 1998-09-29 | Reader and reading system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000106617A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1158775A1 (en) * | 2000-05-15 | 2001-11-28 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Self-illuminating colour imaging device |
| US6928136B2 (en) | 2001-05-29 | 2005-08-09 | Semiconductor Energy Laboratory Co., Ltd. | Pulse output circuit, shift register, and display device |
| US6958750B2 (en) | 2001-07-16 | 2005-10-25 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device |
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-
1998
- 1998-09-29 JP JP10275472A patent/JP2000106617A/en not_active Withdrawn
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