JPS5943868B2 - Drive method of document reading device - Google Patents
Drive method of document reading deviceInfo
- Publication number
- JPS5943868B2 JPS5943868B2 JP16813079A JP16813079A JPS5943868B2 JP S5943868 B2 JPS5943868 B2 JP S5943868B2 JP 16813079 A JP16813079 A JP 16813079A JP 16813079 A JP16813079 A JP 16813079A JP S5943868 B2 JPS5943868 B2 JP S5943868B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- lens
- driving method
- image sensor
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
- H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
- H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
- H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
- H04N1/1931—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays with scanning elements electrically interconnected in groups
Description
【発明の詳細な説明】
本発明はファクシミリ送信装置あるいは複写装置等に適
用される原稿読取装置の駆動方式に関し、特に、原稿読
取装置の光源部の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driving method for a document reading device applied to a facsimile transmitting device, a copying device, etc., and particularly relates to an improvement of a light source section of the document reading device.
従来、ファクシミリ送信装置あるいは複写装置等におけ
る原稿の読取は光電的に行つている。その１つとして、
けい光灯等の光源を用いて原稿に照射し、その反射光を
１つのレンズによつて１次元的な、ＩＣセンサ面に縮小
結像して光電変換するものがある。しかしながら、この
ものにおいては、原稿からＩＣセンサまでの光路長が大
きくなつて大型化し、また、レンズおよびセンサの設定
が難かしいという欠点があつた。さらにまた、上述の欠
点を排除したものとして、光電変換部に原稿の１ピッチ
が１対１に対応する大形イメージセンサ（以下、単にイ
メージセンサとする）を採用したものが着々と実用化さ
れている。2. Description of the Related Art Conventionally, a facsimile transmitting device, a copying device, or the like has used a photoelectric method to read a document. One of them is
Some types use a light source such as a fluorescent lamp to irradiate a document, and the reflected light is reduced to a one-dimensional image on an IC sensor surface using a single lens and photoelectrically converted. However, this device has disadvantages in that the optical path length from the document to the IC sensor becomes large, resulting in a large size, and it is difficult to set the lens and sensor. Furthermore, in order to eliminate the above-mentioned drawbacks, devices employing a large image sensor (hereinafter simply referred to as an image sensor) that corresponds one-to-one to each pitch of the original in the photoelectric conversion section are steadily being put into practical use. has been done.
これにより、原稿とイメージセンサとはほぼ密着した構
成が可能となり、従つて、小型化され、高精度のレンズ
およびＩＣセンサが不要となつた。しかしらがら、この
ものにおいても、光源として管径の大きいけい光灯を使
用しているのでまだ十分に小型化されてなく、また、消
費電力が大きく、さらにまた、けい光灯の寿命が５００
〜１０００時間と短かいという問題点があつた。さらに
また、消費電力を低減し且つ光源の寿命を大きくするも
のとして、発光ダイオード等の発光素子のアレイを用い
、必要な箇所の発光素子のみを飛点走査をするものがあ
る（参照：特開昭５２−１０４８０８号）。This allows the document and the image sensor to be in close contact with each other, thereby reducing the size and eliminating the need for a high-precision lens and IC sensor. However, since this device uses a fluorescent lamp with a large tube diameter as a light source, it has not yet been sufficiently miniaturized, consumes a large amount of power, and has a lifespan of 500 years.
The problem was that it was short at ~1000 hours. Furthermore, in order to reduce power consumption and extend the life of the light source, there is a method that uses an array of light emitting elements such as light emitting diodes and performs flying point scanning on only the necessary light emitting elements (reference: Japanese Patent Application Laid-Open No. (Sho 52-104808).
つまり、発光素子としての発光ダイオードアレイ（光ス
ポツト）と受光素子としての光導電体とを分離せずに、
発光ダイオードアレイを飛点走査（シフト）させること
により画信号を読取つている。つまり、発光ダイオード
アレイの走査自体が画信号走査となつており、発光素子
としての発光ダイオードアレイの駆動に受光素子として
の光導電体の動作が追随するようになつている。従つて
、分解能は、発光ダイオードアレイの密度、その光スポ
ット径、遮光方法等に依存し、この結果、発光ダイオー
ドを高密度実装すると高速走査に問題がある。また、受
光素子としての光導電体の動作は光応等速度の影響を受
け、Ｓ／Ｎ比が著しく悪いという問題点がある。本発明
の目的は、受光素子の走査駆動に同期して、発光素子の
アレイのうちの複数個を順次点灯させるという構想にも
とづき画信号は受光素子の走査により得るようにし、こ
れにより、消費電力の低減等の効果と共に、高速走査お
よび高分解能を向上させ、また、光応答速度の影響を受
けずにＳ／Ｎ比を高くすることにある。以下、図面によ
り本発明を説明する。In other words, without separating the light emitting diode array (light spot) as a light emitting element and the photoconductor as a light receiving element,
The image signal is read by scanning (shifting) the light emitting diode array. In other words, the scanning of the light emitting diode array itself is image signal scanning, and the operation of the photoconductor as a light receiving element follows the driving of the light emitting diode array as a light emitting element. Therefore, the resolution depends on the density of the light emitting diode array, its light spot diameter, light shielding method, etc. As a result, when light emitting diodes are mounted in a high density, there is a problem in high-speed scanning. Furthermore, the operation of the photoconductor as a light-receiving element is affected by the photonic velocity, resulting in a problem that the S/N ratio is extremely poor. An object of the present invention is to obtain an image signal by scanning the light-receiving elements based on the concept of sequentially lighting up a plurality of light-emitting elements in an array in synchronization with the scanning drive of the light-receiving elements, thereby reducing power consumption. The object of the present invention is to improve high-speed scanning and high resolution, as well as to increase the S/N ratio without being affected by the optical response speed. The present invention will be explained below with reference to the drawings.
第１図は従来の原稿読取装置の斜視図である。FIG. 1 is a perspective view of a conventional document reading device.
第１図において、けい光灯１から光を原稿２に照射し、
その反射光を凸レンズ３によつてＩＣセンサ４のセンサ
面に縮小結像させている。このようにして、原稿２がピ
ツチ毎にＩＣセンサ４によつて読取られる。すなわち、
原稿２はけい光灯１、レンズ３およびＩＣセンサ４に対
して相対的に所定のピツチで移動しており、各ピツチは
一度にＩＣセンサ４によつて読取られる。図示するよう
に、ＩＣセンサ４は小さいが、原稿２からＩＣセンサ４
までの光路長は大きく、従つて、装置全体が大型化し、
また、通常、縮小率が大きいために、レンズ３は高分解
能が必要とされ且つＩＣセンサ４に高精度が要求される
等の欠点があつた。第２図も従来の原稿読取装置の斜視
図であつて、上述の欠点を排除してある。第２図におい
ては、第１図のレンズ３の代りに、導光部５を設けてあ
り、また、１Ｃセンサ４の代りにイメージセンサ６が設
けてある。このイメージセンサ６は原稿２の１ピツチに
１対１に対応しており、従つて、イメージセンサ６の幅
は原稿２の幅と同程度である。また、導光部５はイメー
ジセンサ６に含まれる１列に配列された受光素子への光
照射の干渉を防止するためのものである。図示するよう
に、導光部５はイメージセンサ６とはほぼ密着状態にあ
り、また、原稿２との距離も小さい。この結果、原稿２
からイメージセンサ６までの光路長は第１図の従来形に
比べて小さく、従つて、装置全体も小型化され、高精度
のレンズおよびＩＣセンサが不必要になつたが、光源と
して管径の大きいけい光灯１を用いているためにまだ十
分に小型化されておらす、また、消費電力も大きく、さ
らに、けい光灯１の寿命が短かいという問題があつた。
第３図Ａおよび第３図Ｂは本発明の一実施例としての原
稿読取装置の斜視図および側面図である。In FIG. 1, light is irradiated from a fluorescent lamp 1 onto a document 2,
The reflected light is formed into a reduced image on the sensor surface of the IC sensor 4 by the convex lens 3. In this way, the document 2 is read by the IC sensor 4 pitch by pitch. That is,
The document 2 is moved at predetermined pitches relative to the fluorescent lamp 1, the lens 3, and the IC sensor 4, and each pitch is read by the IC sensor 4 at a time. As shown in the figure, although the IC sensor 4 is small, the IC sensor 4 is
The optical path length up to
Further, since the reduction ratio is usually large, the lens 3 is required to have high resolution, and the IC sensor 4 is required to have high precision. FIG. 2 is also a perspective view of a conventional document reading device, which eliminates the above-mentioned drawbacks. In FIG. 2, a light guide section 5 is provided in place of the lens 3 in FIG. 1, and an image sensor 6 is provided in place of the 1C sensor 4. This image sensor 6 corresponds one-to-one to one pitch of the original 2, and therefore the width of the image sensor 6 is approximately the same as the width of the original 2. Further, the light guiding section 5 is for preventing interference of light irradiation to the light receiving elements arranged in one row included in the image sensor 6. As shown in the figure, the light guide section 5 is in almost close contact with the image sensor 6, and the distance from the document 2 is also small. As a result, manuscript 2
The optical path length from the image sensor 6 to the image sensor 6 is smaller than that of the conventional type shown in Fig. 1, and the entire device is therefore smaller, eliminating the need for a high-precision lens and IC sensor. Since the large fluorescent lamp 1 is used, the size of the fluorescent lamp 1 has not yet been sufficiently reduced, the power consumption is large, and the life of the fluorescent lamp 1 is short.
FIGS. 3A and 3B are a perspective view and a side view of a document reading device as an embodiment of the present invention.
第３図Ａにおいて、光源部７は導光部５と一体に構成さ
れており、光源部７の光発射は１列に配置された発光素
子たとえば発光ダイオードＤによつて行われる。このよ
うに構成することにより、発光ダイオードＤからイメー
ジセンサ６までの光路長は、第３図Ｂの矢印に示すよう
に非常に短かくなり、従つて、装置を小型化することが
でき、また、発光ダイオードＤの寿命は、通常、１万時
間以上であるので、光源の保守点検が容易となる。また
、本発明においては、動作中、発光ダイオードＤをすべ
て駆動させるのではなく、必要最小限の発光ダイオード
Ｄのみを駆動させるので、消費電力も従来形に比べて大
幅に低減できる。以下、光源部７について詳細に説明す
る。第４図は第３図Ａの光源部７にその駆動回路をハイ
ブリツド化した基板の模写図である。In FIG. 3A, the light source section 7 is constructed integrally with the light guide section 5, and light emission from the light source section 7 is performed by light emitting elements such as light emitting diodes D arranged in one row. With this configuration, the optical path length from the light emitting diode D to the image sensor 6 becomes extremely short as shown by the arrow in FIG. Since the life of the light emitting diode D is usually 10,000 hours or more, maintenance and inspection of the light source becomes easy. Further, in the present invention, during operation, only the minimum necessary number of light emitting diodes D is driven instead of driving all of the light emitting diodes D, so power consumption can be significantly reduced compared to the conventional type. Hereinafter, the light source section 7 will be explained in detail. FIG. 4 is a schematic diagram of a board in which the light source section 7 of FIG. 3A is hybridized with its driving circuit.
第４図の基板上においては、たとえば、８個の発光ダイ
オードＤが１プロツクを構成しており、各プロツク毎に
シフトレジスタ７３−１，７３−２，・・・・・・，７
３−ｎおよびＬＥＤ駆動回路７４−１，７４−２，・・
・・・・，７４−ｎがそれぞれ設けられている。これに
より、発光ダイオードＤは所定数たとえば４個のみ点灯
し、これらの点灯状態は第４図において右から左へ順次
シフトされていく。このシフトはイメーヅセンサ６の受
光素子の駆動に同期しており、すなわち、点灯状態にあ
る発光ダイオードＤのほぼ中心位置に対応する受光素子
が駆動するようにされている。なお、シフトレジスタは
１プロツク当りの発光ダイオード数と同波のフリツプフ
ロツプを直列接続することにより構成することができ、
また、ＬＥＤ駆動回路も同数のトランジスタにより構成
することができる。また、ＶＤＤおよび８Ｓは電源ライ
ンを示す。第５図は第３図Ａの装置のプロツク回路図で
ある。On the board shown in FIG. 4, for example, eight light emitting diodes D constitute one block, and each block has shift registers 73-1, 73-2, . . . , 7.
3-n and LED drive circuits 74-1, 74-2,...
..., 74-n are provided, respectively. As a result, only a predetermined number, for example four, of the light emitting diodes D are lit, and their lighting states are sequentially shifted from right to left in FIG. This shift is synchronized with the driving of the light-receiving element of the image sensor 6, that is, the light-receiving element corresponding to approximately the center position of the light-emitting diode D in the lit state is driven. Note that the shift register can be constructed by connecting in series flip-flops with the same wave as the number of light emitting diodes per one block.
Moreover, the LED drive circuit can also be configured with the same number of transistors. Further, VDD and 8S indicate power supply lines. FIG. 5 is a block circuit diagram of the apparatus of FIG. 3A.
第５図において、光源部７とイメージセンサ６は同一の
クロツク信号「Ｃ」によつて駆動される。すなわち、光
源部７とイメージセンサ６とは同期していることになる
。ただし、イメージセンサ６はクロツク信号「Ｃ」をそ
のままシフト信号として用いるのに対し、光源部７はク
ロツク信号「Ｃ」を分周器７１によつて分周したクロツ
ク信号「Ｃ′」を用いている。この理由は、光源部７に
おける発光ダイオード密度とイメージセンサ６の受光素
子密度とは異つているからであり、従つて、分周器７１
の分周比はこれらの密度比によつて決定される。光源部
７の入力設定回路７２は点灯状態にある発光ダイオード
の数を設定するものであり、例として「４」を設定して
ある。また、イメージセンサ６は、クロツク信号「Ｃ」
によつてシフトされるシフトレジスタ６１、センサ駆動
回路６２およびセンサアレイ６３からなる。なお、カウ
ンタ７６は最後のシフトレジスタ７３−ｎをホールドす
るためのものである。始めに、光源部７の動作を説明す
る。第６図ａ〜第６図ｍは第５図の光源部７の動作を説
明するための波形図である。In FIG. 5, the light source section 7 and the image sensor 6 are driven by the same clock signal "C". That is, the light source section 7 and the image sensor 6 are synchronized. However, while the image sensor 6 uses the clock signal "C" as it is as a shift signal, the light source section 7 uses the clock signal "C'" obtained by dividing the clock signal "C" by a frequency divider 71. There is. The reason for this is that the light emitting diode density in the light source section 7 and the light receiving element density of the image sensor 6 are different, so that the frequency divider 71
The frequency division ratio of is determined by these density ratios. The input setting circuit 72 of the light source section 7 sets the number of light emitting diodes in the lighting state, and is set to "4" as an example. The image sensor 6 also receives a clock signal "C".
It consists of a shift register 61, a sensor drive circuit 62, and a sensor array 63. Note that the counter 76 is for holding the last shift register 73-n. First, the operation of the light source section 7 will be explained. 6a to 6m are waveform diagrams for explaining the operation of the light source section 7 in FIG. 5. FIG.
図中の下端のメモリはＬＥＤアレイ７５の発光ダイオー
ドの順序を示す。波形において、ハイレベルのとき発光
ダイオードが点灯していることを示し、ローレベルのと
き発光ダイオードが消灯していることを示している。始
めは、第６図ａに示すように、いずれの発光ダイオード
も点灯していない。スタートパルス１Ｓ」をシフトレジ
スタ７３−１が受信すると、シフトレジスタ７３−１は
入力設定回路７２の値を並列入力して並列出力する。従
つて、第６図ｂに示すように、１番目〜４番目の発光ダ
イ不−ドが点灯する。その後、分周器７１からのクロッ
ク信号「σ」を受信する毎に、第６図Ｃ、第６図Ｄ，・
・・・・・に示すように、発光ダイオードの点灯状態は
シノトされ、最後に、第６図ｋに示すように、最後の４
つの発光ダイオードが点灯する。ここにおいて、次のク
ロツク信号「Ｃ′」をシフトレジスタ７３−１が受信す
ると、シフトレジスタ７３−ｎは最後ビツトを入力設定
回路７２に転送すると同時にシフトレジスタ７３−ｎは
りセツトされる。従つて、一時的に第６図２に示すよう
に両端の発光ダイオードが点灯する。以下、この動作が
繰り返される。第７図ａおよび第７図ｂは第５図におけ
る光源部７の発光ダイオードの駆動状態とイメージセン
サ６の受光素子の駆動状態を対比させて図示したもので
ある。The memory at the bottom of the figure indicates the order of the light emitting diodes of the LED array 75. In the waveform, a high level indicates that the light emitting diode is on, and a low level indicates that the light emitting diode is off. Initially, as shown in FIG. 6a, none of the light emitting diodes are lit. When the shift register 73-1 receives the start pulse 1S, the shift register 73-1 inputs the values of the input setting circuit 72 in parallel and outputs them in parallel. Therefore, as shown in FIG. 6b, the first to fourth light emitting diodes are lit. After that, each time the clock signal "σ" from the frequency divider 71 is received,
As shown in..., the lighting state of the light emitting diode is changed, and finally, as shown in Figure 6k, the lighting state of the light emitting diode is adjusted.
Two light emitting diodes light up. Here, when shift register 73-1 receives the next clock signal "C'", shift register 73-n transfers the last bit to input setting circuit 72, and at the same time shift register 73-n is reset. Therefore, the light emitting diodes at both ends are temporarily illuminated as shown in FIG. 6 and 2. This operation is repeated thereafter. FIGS. 7a and 7b show a comparison between the driving state of the light emitting diode of the light source section 7 and the driving state of the light receiving element of the image sensor 6 in FIG.
たとえば、第７図ａに示すイメージセンサ６の受光素子
密度を１０個／ＭｌＬとし、第７図ｂに示す光源部７の
発光ダイオード密度を０．２５個／１Ｕとすれば、密度
比は０．２５／１０＝１／４０であり、従つて、分周器
７１の分周比は１／４０に設定される。また、発光ダイ
オードを４個点灯させる場合には、光量分布は、たとえ
ば、第７図ｂに示すようになり、光量均一部は４／０．
２５＝８ｍ１Ｌとなり、イメージセンサ６のピットが８
０ビツト含まれることになる。第７図ａおよび第７図ｂ
から分るように、光源部７の発光ダイオードはイメージ
センサ６の受光素子の両端の外端（Ｙに相当）まで配置
されており、これにより、両端の受光素子に対しても均
一な光量が得られるようにしてある。なお、上述の実施
例における導光部５のレンズは単なる光案内孔よりなる
レンズ、あるいはロツドレンズあるいは光フアイバレン
ズでもよい。For example, if the light receiving element density of the image sensor 6 shown in FIG. 7a is 10 pieces/MlL and the light emitting diode density of the light source section 7 shown in FIG. 7b is 0.25 pieces/1U, the density ratio is 0. .25/10=1/40, therefore, the frequency division ratio of the frequency divider 71 is set to 1/40. In addition, when four light emitting diodes are turned on, the light amount distribution becomes, for example, as shown in FIG. 7b, and the light amount uniform portion is 4/0.
25=8m1L, and the pit of image sensor 6 is 8
0 bits will be included. Figures 7a and 7b
As can be seen, the light emitting diodes of the light source section 7 are arranged up to the outer ends (corresponding to Y) of both ends of the light receiving element of the image sensor 6, and as a result, a uniform amount of light is distributed to the light receiving elements at both ends. It's made so that you can get it. In addition, the lens of the light guide section 5 in the above embodiment may be a lens consisting of a simple light guide hole, a rod lens, or an optical fiber lens.
本発明によれば、受光素子を走査駆動させることにより
両信号を読取り、このとき、発光素子の順次点灯は受光
素子の走査駆動に同期させて必要な部分のみ行つている
ので、消費電力の低減等の効果と共に、高速走査および
高分解能の点で有利であり、また、光応答速度の影響を
受けないのでＳ／Ｎ比が高いという効果を奏する。According to the present invention, both signals are read by scanningly driving the light-receiving element, and at this time, the light-emitting elements are sequentially turned on only in necessary parts in synchronization with the scanning drive of the light-receiving element, thereby reducing power consumption. In addition to the above effects, this method is advantageous in terms of high-speed scanning and high resolution, and is also advantageous in that it has a high S/N ratio because it is not affected by the optical response speed.
第１図および第２図は従来の原稿読取装置の斜視図、第
３図Ａおよび第３図Ｂは本発明の一実施例としての原稿
読取装置の斜視図および側面図、第４図は第３図Ａの光
源部７にその駆動回路をハイブリツド化した基板の模写
図、第５図は第３図Ａの装置のブツク回路図、第６図ａ
〜第６図ｍは第５図の光源部７の動作を説明するための
波形図、第７図ａおよび第７図ｂは第５図における光源
部７の発光ダイオードの駆動状態およびイメージセンサ
６の受光素子の駆動状態を説明する図である。
１・・・・・・けい光灯、２・・・・・・原稿、３・・
・・・・レンズ、４・・・・・・ＩＣセンサ、５・・・
・・・導光部、６・・・・・・イメージセンサ、７・・
・・・・光源部。1 and 2 are perspective views of a conventional document reading device, FIGS. 3A and 3B are perspective views and side views of a document reading device as an embodiment of the present invention, and FIG. 4 is a perspective view of a conventional document reading device. Figure 3 is a copy of the board in which the light source section 7 of A is hybridized with its drive circuit, Figure 5 is a book circuit diagram of the device of Figure 3 A, and Figure 6 a.
6 m is a waveform diagram for explaining the operation of the light source section 7 in FIG. 5, and FIGS. 7 a and 7 b are waveform diagrams for explaining the operation of the light source section 7 in FIG. FIG. 2 is a diagram illustrating a driving state of a light receiving element of FIG. 1...Fluorescent light, 2...Manuscript, 3...
...Lens, 4...IC sensor, 5...
...Light guiding part, 6... Image sensor, 7...
...Light source section.
Claims (1)
センサと、前記各受光素子に対向して配列された同数の
レンズを備える導光部と、該導光部に原稿に光を照射す
るための光源とを具備して前記原稿を１対１に光電的に
読取る原稿読取装置において、前記光源が前記導光部の
各レンズに対応し且つ前記原稿に対応して配列された発
光素子のアレイを備え、前記各受光素子の走査駆動に同
期して複数個の前記発光素子を順次点灯せしめたことを
特徴とする原稿読取装置の駆動方式。 ２ 導体部と光源とを一体に構成した特許請求の範囲第
１項に記載の駆動方式。 ３ 受光素子が光導電効果素子である特許請求の範囲第
１項に記載の駆動方式。 ４ 導光部のレンズが光案内孔である特許請求の範囲第
１項に記載の駆動方式。 ５ 導光部のレンズがロッドレンズである特許請求の範
囲第１項に記載の駆動方式。 ６ 導光部のレンズが光ファイバレンズである特許請求
の範囲第１項に記載の駆動方式。 ７ 発光素子が発光ダイオードＬＥＤである特許請求の
範囲第１項に記載の駆動方式。[Scope of Claims] 1. An image sensor including a plurality of light receiving elements arranged in one row, a light guiding section including the same number of lenses arranged facing each of the light receiving elements, and an image sensor having a document on the light guiding section. In the document reading device that photoelectrically reads the document on a one-to-one basis, the light source is arranged in correspondence with each lens of the light guide section and in correspondence with the document. What is claimed is: 1. A driving method for a document reading device, comprising: an array of light emitting elements, the plurality of light emitting elements being sequentially turned on in synchronization with scanning driving of each of the light receiving elements. 2. The driving method according to claim 1, in which the conductor portion and the light source are integrated. 3. The driving method according to claim 1, wherein the light receiving element is a photoconductive effect element. 4. The driving method according to claim 1, wherein the lens of the light guide portion is a light guide hole. 5. The driving method according to claim 1, wherein the lens of the light guiding section is a rod lens. 6. The driving method according to claim 1, wherein the lens of the light guiding section is an optical fiber lens. 7. The driving method according to claim 1, wherein the light emitting element is a light emitting diode LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16813079A JPS5943868B2 (en) | 1979-12-26 | 1979-12-26 | Drive method of document reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16813079A JPS5943868B2 (en) | 1979-12-26 | 1979-12-26 | Drive method of document reading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5698072A JPS5698072A (en) | 1981-08-07 |
| JPS5943868B2 true JPS5943868B2 (en) | 1984-10-25 |
Family
ID=15862388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16813079A Expired JPS5943868B2 (en) | 1979-12-26 | 1979-12-26 | Drive method of document reading device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5943868B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59269A (en) * | 1982-06-25 | 1984-01-05 | Toshiba Corp | Picture reading sensor |
| JPS59153373A (en) * | 1983-02-21 | 1984-09-01 | Canon Inc | Optical sensor device |
| JPS59223059A (en) * | 1983-06-01 | 1984-12-14 | Canon Inc | Picture reader |
| JPS59212071A (en) * | 1983-05-18 | 1984-11-30 | Canon Inc | Lighting device for light source |
| JPH0783420B2 (en) * | 1985-10-16 | 1995-09-06 | 株式会社東芝 | Image reader |
| JP2012099950A (en) * | 2010-10-29 | 2012-05-24 | Kyocera Mita Corp | Image reading device and image forming device |
-
1979
- 1979-12-26 JP JP16813079A patent/JPS5943868B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5698072A (en) | 1981-08-07 |
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