JPH0710087B2 - Image sensor - Google Patents
Image sensorInfo
- Publication number
- JPH0710087B2 JPH0710087B2 JP62287505A JP28750587A JPH0710087B2 JP H0710087 B2 JPH0710087 B2 JP H0710087B2 JP 62287505 A JP62287505 A JP 62287505A JP 28750587 A JP28750587 A JP 28750587A JP H0710087 B2 JPH0710087 B2 JP H0710087B2
- Authority
- JP
- Japan
- Prior art keywords
- light receiving
- light
- image sensor
- receiving elements
- receiving 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.)
- Expired - Fee Related
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- Transforming Light Signals Into Electric Signals (AREA)
- Facsimile Heads (AREA)
- Facsimile Scanning Arrangements (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、例えばファクシミリ用送信原稿と同一サイ
ズに、単一または複数個のセンサを配列し原稿上の画情
報を読み取るイメージセンサに関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image sensor for reading image information on a document by arranging a single or a plurality of sensors in the same size as a facsimile transmission document, for example. is there.
近年、ファクシミリ、光学文字読取り装置（以下OCRと
いう）などの光電変換装置の技術的進歩は著しく、その
中で、ファクシミリ、OCRなどの装置の小型化を目ざ
し、原稿密着型のイメージセンサが開発され実用化され
ている。In recent years, the technological progress of photoelectric conversion devices such as facsimiles and optical character readers (hereinafter referred to as OCR) has been remarkable, and in the midst of these developments, document contact image sensors have been developed aiming at downsizing of devices such as facsimiles and OCR. It has been put to practical use.
第７図は三菱電機株式会社編「密着イメージセンサ」
（昭和62年６月発行）に紹介された従来のイメージセン
サを示す断面図であり、第８図はブロック図であり、図
において１は発光素子となる発光素子アレイ、２は基板
8a上に配列された受光素子、３は受光素子２上に位置
し、１対１の正立等倍結像を行なうロッドレンズアレ
イ、４は発光素子アレイ１およびロッドレンズアレイ３
の上方に位置する光透過板、５は光透過板４上を移動す
る原稿で、5aは原稿５の読取り位置となる。又、６は原
稿５を送るプラテンローラ、７は基板8aに実装された信
号処理回路で、第８図に示すように、シフトレジスタお
よびアナログスイッチ7aとその出力を増幅するアンプ7b
とにより構成されている。第７図の８はフレームで、上
記発光素子アレイ１、受光素子２、ロッドレンズアレイ
３、信号処理回路７などを内包している。Figure 7 is a "contact image sensor" edited by Mitsubishi Electric Corporation.
FIG. 8 is a cross-sectional view showing a conventional image sensor introduced in (published in June 1987), FIG. 8 is a block diagram, and in the drawing, 1 is a light emitting element array as a light emitting element, and 2 is a substrate.
8a is a light-receiving element, 3 is a light-receiving element, 3 is located on the light-receiving element 2, and is a rod lens array for performing 1: 1 erecting equal-magnification imaging. 4 is a light-emitting element array 1 and a rod lens array 3
A light transmitting plate 5 located above the document is a document moving on the light transmitting plate 4, and 5a is a reading position of the document 5. Further, 6 is a platen roller for sending the original 5, 7 is a signal processing circuit mounted on the substrate 8a, and as shown in FIG. 8, a shift register and an analog switch 7a and an amplifier 7b for amplifying the output thereof.
It is composed of and. Reference numeral 8 in FIG. 7 denotes a frame which includes the light emitting element array 1, the light receiving element 2, the rod lens array 3, the signal processing circuit 7, and the like.
次に動作について説明する。第９図はその動作を説明す
るためのタイミング図である。プラテンローラ６により
搬送される原稿５は光透過板４上を移動する。このと
き、発光素子アレイ１の発光により原稿５の読取り位置
5aに反射光が生じ、その像はロッドレンズアレイ３によ
って正立等倍の像となり、受光素子２に受光されてその
出力を信号処理回路７に送り、そこで電気信号に変換さ
れ、アンプ7bで増幅される。そして、原稿５の搬送を連
続して行うことにより、原稿５の読み取りが行なわれ
る。Next, the operation will be described. FIG. 9 is a timing chart for explaining the operation. The document 5 conveyed by the platen roller 6 moves on the light transmitting plate 4. At this time, the reading position of the document 5 is caused by the light emission of the light emitting element array 1.
Reflected light is generated on 5a, and the image becomes an erecting equal-magnification image by the rod lens array 3 and is received by the light receiving element 2 and its output is sent to the signal processing circuit 7, where it is converted into an electric signal and is amplified by the amplifier 7b. Is amplified. Then, the document 5 is read by continuously conveying the document 5.
上記信号処理回路７としては、個々の受光素子２と接続
されたアナログスイッチの順次駆動にて受光素子２の受
光した電荷を電流又は電圧に変換して出力させればよ
く、受光素子２と同ピット数のシフトレジスタをこの順
次駆動手段に用いれば容易な回路構成となる。As the signal processing circuit 7, the analog switches connected to the individual light receiving elements 2 may be sequentially driven to convert the charges received by the light receiving elements 2 into currents or voltages and output the converted currents or voltages. If a shift register for the number of pits is used for this sequential driving means, the circuit structure becomes easy.
第８図のブロック図、第９図のタイミング図にて“CLOC
K"と示すのは、このシフトレジスタの動作転送信号を示
しており、“SI"は受光素子２の１ビット目に接続され
たアナログスイッチをシフトレジスタの先頭ビットの出
力にて“ON"させることを示しており、受光素子２に接
続されたアナログスイッチをシフトレジスタの先頭ビッ
トからクロック信号に同期して順次転送してアナログス
イッチをそれぞれ“ON"して行くことにより、１ライン
の原稿読取り信号“SIG"が出力される。In the block diagram of FIG. 8 and the timing diagram of FIG. 9, “CLOC
"K" indicates the operation transfer signal of this shift register, and "SI" turns on the analog switch connected to the first bit of the light receiving element 2 by the output of the first bit of the shift register. That is, the analog switches connected to the light receiving element 2 are sequentially transferred from the first bit of the shift register in synchronization with the clock signal and the analog switches are turned “ON” respectively to read one line of the original document. The signal "SIG" is output.
なお、図中“VLED"“GLED"は発光素子アレイ１への電源
入力であり、“VDD"“VSS"などは信号処理回路７の電源
入力、“GND"はグランド電位である。In the figure, “VLED” and “GLED” are power inputs to the light emitting element array 1, “V DD ”, “V SS ”, and the like are power inputs of the signal processing circuit 7, and “GND” is a ground potential.
従来のイメージセンサは以上のように構成されているの
で、カラー画像読取り装置に用いようとすると、発光素
子アレイ１側の光源切換方式又は受光素子２上の光フィ
ルタ切換方式のいずれかの方式となり、数回の切換えに
よるカラー画像読取り出力信号が１ライン分ずつ出るま
で原稿５を搬送せず、固定しておくことが必要であり、
読取り速度が低下してしまう。Since the conventional image sensor is configured as described above, when it is used in a color image reading apparatus, either a light source switching method on the light emitting element array 1 side or an optical filter switching method on the light receiving element 2 is used. , It is necessary to fix the original 5 not to convey it until the color image reading output signal is output for each line by switching several times.
The reading speed will decrease.
又、光フィルタ切換方式は機構的に難しく、受光素子２
を分割し、光フィルタを各色（３〜４色）配置するよう
な構成がとられたりして、カラー画像読取り装置が高価
になってしまうなどの問題点があった。Also, the optical filter switching method is mechanically difficult, and the light receiving element 2
However, there is a problem that the color image reading apparatus becomes expensive because the optical filter is divided and the optical filters are arranged for each color (3 to 4 colors).
さらに、単色読取りの高解像度化を行うには、受光素子
２の配置ピッチを高密度にしかつそれに接続されるアナ
ログスイッチ、シフトレジスタなどの信号処理回路７も
増加することになり、出力信号のS/N比劣化を招いた
り、それらの結果としてイメージセンサが高価格になる
などの問題点があった。Further, in order to increase the resolution of single color reading, the arrangement pitch of the light receiving elements 2 should be made high and the number of signal processing circuits 7 such as analog switches and shift registers connected to the light receiving elements 2 should be increased. There was a problem that the / N ratio was deteriorated and as a result, the image sensor became expensive.
この発明は上記のような問題点を解消するためになされ
たもので、読取り速度を低下させることなく、光フィル
タ切換方式を用いなくて済むカラー画像読取装置用に適
用でき、かつ高解像度化が可能で、しかも安価にできる
イメージセンサを得ることを目的とする。The present invention has been made to solve the above problems, and can be applied to a color image reading apparatus that does not use an optical filter switching system without lowering the reading speed, and has a high resolution. An object of the present invention is to obtain an image sensor that can be manufactured at low cost.
この発明に係るイメージセンサは、ｎ個の受光素子をｌ
個の各アナログスイッチに接続し、１クロック転送内に
ｌ個のアナログスイッチの駆動とこの受光素子の共通電
極の切換えを同期させてｎ個の受光素子の受光出力を得
るとともに光源切換えを行うようにしたものである。The image sensor according to the present invention has n light receiving elements
Each analog switch is connected, and the driving of 1 analog switch and the switching of the common electrode of this light receiving element are synchronized within one clock transfer to obtain the light reception output of the n light receiving elements and perform the light source switching. It is the one.
この発明における受光素子は画像読取り１ビットをｎ個
にて構成し、画像読取りビットをｌビットとし、ｌ個の
アナログスイッチを順次駆動して受光出力を得て、ｎ個
の受光素子の受光出力を１クロック転送内に行ない、そ
のｎ個の受光出力切換えと受光素子の共通電極の切換え
制御により光源の切換えを同期させて行い、カラー画像
読取り出力信号を得る。In the light receiving element in the present invention, 1 bit of image reading is configured by n pieces, the image reading bit is 1 bit, and 1 analog switch is sequentially driven to obtain a light receiving output, and the light receiving output of n light receiving elements. Is performed within one clock transfer, and the light source switching is synchronized by switching the n light receiving outputs and controlling the common electrode of the light receiving element to obtain a color image read output signal.
以下、この発明の一実施例を図について説明する。第１
図において、１は発光素子アレイ、２は受光素子で、第
７図と同様にフレーム内の基板上に配設され、画像読取
り１ビットをｎ個の受光素子で構成し、画像読取りビッ
トをｍビットとしており、この第１図の実施例では画像
読取り１ビットを４個の受光素子（ａ、ｂ、ｃ、ｄで示
す）で構成している場合を示している。３は第７図で示
したのと同様のロッドレンズアレイで、フレーム内にお
いて、上記受光素子２畳に位置し、１対１の正立等倍結
像を行うものである。An embodiment of the present invention will be described below with reference to the drawings. First
In the figure, 1 is a light emitting element array, 2 is a light receiving element, which is arranged on a substrate in a frame similarly to FIG. 7, and 1 bit of image reading is constituted by n light receiving elements, and the image reading bit is m. In the embodiment shown in FIG. 1, one bit of image reading is constituted by four light receiving elements (indicated by a, b, c and d). Reference numeral 3 denotes a rod lens array similar to that shown in FIG. 7, which is located in the light receiving element 2 tatami in the frame and performs 1: 1 erecting equal-magnification imaging.
７は処理回路でｍビットシフトレジスタおよびｍ個のア
ナログスイッチ7aとアンプ7bとで構成されている。A processing circuit 7 is composed of an m-bit shift register, m analog switches 7a and an amplifier 7b.
なお、図示されていないが光透過板、プラテンローラ、
原稿、読取り位置などは第７図と同様である。Although not shown, a light transmitting plate, a platen roller,
Documents, reading positions, etc. are the same as in FIG.
９は共通電極制御回路で、４個の受光素子ａ、ｂ、ｃ、
ｄの共通電極C1〜C4の制御を行うようにしている。この
共通電極C1〜C4はｍビット（第１図では４ビット）のそ
れぞれの受光素子２にそれぞれ接続されている。Reference numeral 9 denotes a common electrode control circuit, which includes four light receiving elements a, b, c,
The common electrodes C1 to C4 of d are controlled. The common electrodes C1 to C4 are connected to the respective m-bit (4 bits in FIG. 1) light receiving elements 2.
カラー画像読取り装置では、Ｃ（青色）、Ｙ（黄色）、
Ｍ（赤色）、Ｗ（白色）の４色光源の切換えにてカラー
画像読み取り出力信号が得られる。第１図、第２図（第
１図の動作を示すタイミングチャート）に示すものは上
述したようにｍビットの画像読取りにて、ｍビットのシ
フトレジスタ、およびｍ個のアナログスイッチ7aの構成
にて、ｍ個の各アナログスイッチ7aに４個の受光素子２
を接続した構成とし、共通電極C1、C2、C3、C4にそれぞ
れ４個の受光素子２が接続され、共通電極制御回路９で
制御されることを示している。With a color image reader, C (blue), Y (yellow),
A color image reading output signal can be obtained by switching the four color light sources of M (red) and W (white). As shown in FIGS. 1 and 2 (timing chart showing the operation of FIG. 1), as described above, the configuration of the m-bit shift register and the m analog switches 7a is used for the m-bit image reading. And each of the m analog switches 7a has four light receiving elements 2
It is shown that four light receiving elements 2 are connected to each of the common electrodes C1, C2, C3, and C4 and controlled by the common electrode control circuit 9.
D1、D2、D3、D4はＣ（青色）、Ｙ（黄色）、Ｍ（赤
色）、Ｗ（白色）の４色の発光素子に対応した異色発光
素子であり、４色の光源となるものである。D1, D2, D3, and D4 are different-color light emitting elements corresponding to the four color light emitting elements of C (blue), Y (yellow), M (red), and W (white), and are light sources of four colors. is there.
なお、“SI"、“CLOCK"“SIG"“VDD"“VSS"“GLED"など
の動作は従来と同様である。The operation of "SI", "CLOCK", "SIG", "V DD ""V SS ""GLED", etc. is the same as the conventional one.
次に動作について説明する。第１図において１ビットの
画像読取りビットは４個の受光素子２にて構成されてお
り、このビットはシフトレジスタの１クロック転送（第
２図（ｉ））にて第２図（ｊ）に示すように次ビットの
アナログスイッチの動作がなされる。この１クロック転
送時間内に４色の異色発光素子D1、D2、D3、D4を第２図
（ａ）〜第２図（ｄ）に示すように順次切り換える（す
なわち、４色の発光色の異なる光源切換えとなる）とと
もに、ビット内の４個の受光素子２を共通電極C1、C2、
C3、C4にて第２図（ｅ）〜第２図（ｈ）に示すように同
期して制御することにより、１クロック転送時間内にカ
ラー画像読取り出力信号となる第２図（ｋ）に示すよう
に、Ｃ（青色）、Ｙ（黄色）、Ｍ（赤色）、Ｗ（白色）
が順次出力されることになる。Next, the operation will be described. In FIG. 1, the 1-bit image reading bit is composed of four light-receiving elements 2. This bit is transferred to the shift register in 1 clock (FIG. 2 (i)) and is transferred to FIG. 2 (j). As shown, the operation of the analog switch of the next bit is performed. Within this one clock transfer time, the four different color light emitting elements D1, D2, D3 and D4 are sequentially switched as shown in FIGS. 2 (a) to 2 (d) (that is, four different colors of emitted light are changed). The light source is switched), and the four light receiving elements 2 in the bit are connected to the common electrodes C1, C2,
By controlling C3 and C4 in synchronism with each other as shown in FIGS. 2 (e) to 2 (h), a color image read output signal is output within one clock transfer time as shown in FIG. 2 (k). As shown, C (blue), Y (yellow), M (red), W (white)
Will be sequentially output.
共通電極C1、C2、C3、C4の切換制御は、例えばデマルチ
プレクサ回路からなる共通電極制御回路９のSEL1、SEL2
端子への信号入力にて切換制御される。Switching control of the common electrodes C1, C2, C3, C4 is performed by SEL1, SEL2 of the common electrode control circuit 9 including, for example, a demultiplexer circuit.
Switching is controlled by inputting a signal to the terminal.
なお、上記実施例では、カラー画像読取り装置用のイメ
ージセンサについて示したが、第３図のブロック図、第
４図のタイミング図（読み取り出力信号を大きくする場
合のタイミング図）に示すように、第４図（ｃ）の１ク
ロック転送時間内に第４図（ｄ）に示すように受光素子
２の１ビット目に接続され、アナログスイッチをシフト
レジスタの先頭ビットの出力をオンさせて、光源を単色
とし、共通電極C1、C2（第４図（ａ））とC3、C4（第４
図（ｂ））をペアにして同期して制御して解像度を下げ
ることにより、第４図（ｅ）に示すように読取り出力信
号を大きくしたりできる。In the above embodiment, the image sensor for the color image reading apparatus is shown. However, as shown in the block diagram of FIG. 3 and the timing diagram of FIG. 4 (timing diagram when the read output signal is increased), Within one clock transfer time of FIG. 4 (c), as shown in FIG. 4 (d), it is connected to the first bit of the light receiving element 2 and an analog switch turns on the output of the first bit of the shift register to turn on the light source. Is a single color, and common electrodes C1 and C2 (Fig. 4 (a)) and C3 and C4 (fourth)
By lowering the resolution by synchronously controlling the pair of parts shown in FIG. 4 (b), the read output signal can be increased as shown in FIG. 4 (e).
又、第５図は高速化の場合のタイミング図であり、第５
図（ｃ）に示す１クロック転送時間内に第５図（ｄ）に
示すように受光素子２の１ビット目に接続され、アナロ
グスイッチをシフトレジスタの先頭ビットの出力をオン
させて、第５図（ａ）に示すように共通電極C1とC2、第
５図（ｂ）に示すように共通電極C3とC4をペアにして第
５図（ｅ）に示すように読取り出力信号を高速化でき
る。Further, FIG. 5 is a timing chart in the case of speeding up.
Within one clock transfer time shown in FIG. 5 (c), the first bit of the light receiving element 2 is connected as shown in FIG. 5 (d), and the analog switch turns on the output of the first bit of the shift register to turn on the fifth bit. As shown in FIG. 5A, the common electrodes C1 and C2 and the common electrodes C3 and C4 as shown in FIG. 5B can be paired to speed up the read output signal as shown in FIG. 5E. .
さらに、上記実施例では、４個の受光素子２が第６図
（ｃ）に示す主走査方向に配列されたものについて示し
たが、副走査方向に配置しても、主走査、副走査方向２
個ずつ配置してもよく、上記実施例と同様の効果を奏す
る。Further, in the above embodiment, the four light receiving elements 2 are arranged in the main scanning direction shown in FIG. 6 (c), but even if they are arranged in the sub scanning direction, the main scanning direction and the sub scanning direction can be set. Two
They may be arranged one by one, and the same effect as that of the above embodiment is obtained.
これらの受光素子２の配置の様子を第６図（ａ）〜第６
図（ｃ）に示す。第６図（ａ）〜第６図（ｃ）のａ、
ｂ、ｃ、ｄは４個の受光素子を示す。The arrangement of these light receiving elements 2 is shown in FIGS.
It is shown in FIG. A of FIGS. 6 (a) to 6 (c),
Reference numerals b, c, and d denote four light receiving elements.
さらに、上記実施例では一つの画像読取りビットを４個
の受光素子２を配置するものについて示したが、ｎ個と
すれば単色時の解像度はｎ倍になり、しかもシフトレジ
スタ、アナログスイッチはｍビット分で済み、高解像度
化に伴う回路数（シフトレジスタ、アナログスイッチ）
の増加がなく、信号処理回路７を容易に構成できる。Further, in the above embodiment, one image reading bit is arranged with four light receiving elements 2. However, if the number is n, the resolution for a single color becomes n times, and the shift register and the analog switch have m times. The number of circuits required for high resolution (shift register, analog switch)
And the signal processing circuit 7 can be easily configured.
又、共通電極制御回路９をデマルチプレクサ回路にて構
成するものについて述べたが、受光素子２を初期化状態
とするため、第１図、第３図のごとく、RESET端子を設
けてもよく、上記実施例と同様の効果を表し、デマルチ
プレクサ回路に限定するものではなく、他の回路構成で
あってもよい。Although the common electrode control circuit 9 is composed of the demultiplexer circuit, the RESET terminal may be provided as shown in FIGS. 1 and 3 in order to set the light receiving element 2 in the initialized state. The same effect as that of the above-described embodiment is exhibited, and the present invention is not limited to the demultiplexer circuit, and other circuit configurations may be used.
さらに、以上のような構成からなる受光素子とアナログ
スイッチと順次駆動手段とを複数個備えたチップを複数
個配列し、共通電極制御回路９などに接続することで容
易に長尺化が可能となる。Further, by arranging a plurality of chips each having a plurality of light-receiving elements, analog switches, and sequential driving means having the above-mentioned configuration and connecting them to the common electrode control circuit 9 or the like, the length can be easily increased. Become.
これらの受光素子として、フォトトランジスタを用いる
ことにより受光素子ごとの受光による信号の増幅が容易
となり信号増幅回路での大増幅によるS/N比の悪化を防
止できる。By using phototransistors as these light receiving elements, it is possible to easily amplify signals by receiving light for each light receiving element and prevent deterioration of the S / N ratio due to large amplification in the signal amplification circuit.
以上のように、この発明によれば、ｍ個のアナログスイ
ッチにｎ個の受光素子を接続すると共に、ｎ個の上記受
光素子の共通電極への信号の切換はｎ種類の発光色を有
する受光素子と同期するように駆動制御して受光出力を
得るように構成したので、光フィルタ変換方式を用いな
くても済むカラー画像読取り装置用のイメージセンサが
得られ、高解像度の受光素子をより少ない信号処理回路
にて制御でき、取り扱いやすく、その結果低価格のイメ
ージセンサが得られる効果がある。As described above, according to the present invention, the n light receiving elements are connected to the m analog switches, and the signal switching to the common electrode of the n light receiving elements is performed by receiving the light of n kinds of light emission colors. Since the light receiving output is obtained by controlling the drive so as to be synchronized with the element, an image sensor for a color image reading device which does not need to use an optical filter conversion method can be obtained, and the number of high resolution light receiving elements can be reduced. It can be controlled by the signal processing circuit, is easy to handle, and as a result, an inexpensive image sensor can be obtained.
第１図はこの発明の一実施例によるカラー画像読取り装
置用のイメージセンサを示すブロック図、第２図は第１
図のイメージセンサの動作を説明するためのタイミング
図、第３図はこの発明の他の実施例によるイメージセン
サのブロック図、第４図および第５図はそれぞれ第３図
のイメージセンサの動作を説明するためのタイミング
図、第６図（ａ）ないし第６図（ｃ）はそれぞれこの発
明のイメージセンサにおける受光素子の配置を示す説明
図、第７図は従来のイメージセンサを示す断面図、第８
図は従来のイメージセンサのブロック図、第９図は従来
のイメージセンサの動作を説明するためのタイミング図
である。 ２は受光素子、7aはｍビットシフトレジスタおよびアナ
ログスイッチ、D1〜D4は異色発光素子、C1〜C4は受光素
子の共通電極。 なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 is a block diagram showing an image sensor for a color image reading apparatus according to an embodiment of the present invention, and FIG.
FIG. 3 is a timing diagram for explaining the operation of the image sensor shown in FIG. 3, FIG. 3 is a block diagram of the image sensor according to another embodiment of the present invention, and FIGS. 4 and 5 show the operation of the image sensor shown in FIG. 6A to 6C are explanatory diagrams showing the arrangement of light receiving elements in the image sensor of the present invention, and FIG. 7 is a sectional view showing a conventional image sensor. 8th
FIG. 9 is a block diagram of a conventional image sensor, and FIG. 9 is a timing diagram for explaining the operation of the conventional image sensor. 2 is a light receiving element, 7a is an m-bit shift register and an analog switch, D1 to D4 are different color light emitting elements, and C1 to C4 are common electrodes of the light receiving element. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (6)
色を１組としてｌ組（ｌは２以上の整数）設けられ、且
つ画像読み取り幅方向に配置され、各組の同色の発光色
を同時に発送させると共に他の同色の発光色へと順次切
換えｎ種類の全ての発光色を１クロック転送時間内に発
光させる発光素子と、ｎ個を１組としてｍ組（ｍは２以
上の整数）設けられ、上記発光素子から原稿に照射され
た反射光を受光する受光素子と、上記同色の発光に対応
した各組の受光素子毎にそれぞれ共通に接続され、上記
発光素子の発光に同期して受光素子を切換えるｎ個の共
通電極と、上記ｍ組各組の受光素子毎に接続されたアナ
ログスイッチを有し、それらの受光素子からの受光出力
を１クロック転送時間毎に切換えることにより上記原稿
のカラー画像読み取り出力信号を得る処理回路とを備え
たイメージセンサ。1. One set (n is an integer of 2 or more) of n kinds (n is an integer of 2 or more) of different emission colors is provided, and the sets are arranged in the image reading width direction. Emitting emission colors at the same time and sequentially switching to other emission colors of the same color. Light-emitting elements that emit all n types of emission colors within one clock transfer time, and m sets of n sets (m is 2 or more). The light receiving element for receiving the reflected light emitted from the light emitting element to the original and the light receiving element of each group corresponding to the light emission of the same color are connected in common to It has n common electrodes for switching the light receiving elements in synchronism, and an analog switch connected to each of the above m sets of light receiving elements, and switches the light receiving output from these light receiving elements for each clock transfer time. Read the color image of the above document by Image sensor and a processing circuit for obtaining an output signal Ri.
れ一列の受光素子列であることを特徴とする特許請求の
範囲第１項記載のイメージセンサ。2. The image sensor according to claim 1, wherein the n light receiving elements are one light receiving element array arranged in the main scanning direction.
れ複数列の受光素子列であることを特徴とする特許請求
の範囲第１項記載のイメージセンサ。3. The image sensor according to claim 1, wherein the n light receiving elements are a plurality of rows of light receiving elements arranged in the sub-scanning direction.
レジスタにより行うことを特徴とする特許請求の範囲第
１項ないし第３項のいずれか１項記載のイメージセン
サ。4. The image sensor according to claim 1, wherein the analog switches are sequentially driven by a shift register.
れらを順次駆動する手段とを複数個備えたチップを複数
個配列して受光素子を駆動することを特徴とする特許請
求の範囲第１項ないし第４項のいずれか１項記載のイメ
ージセンサ。5. The light receiving element is driven by arranging a plurality of chips each having a plurality of the light receiving element, the analog switch, and a means for sequentially driving them. The image sensor according to claim 4.
れることを特徴とする特許請求の範囲第１項ないし第５
項のいずれか１項記載のイメージセンサ。6. A light-receiving element comprising a phototransistor, as claimed in any one of claims 1 to 5.
The image sensor according to any one of items.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62287505A JPH0710087B2 (en) | 1987-11-16 | 1987-11-16 | Image sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62287505A JPH0710087B2 (en) | 1987-11-16 | 1987-11-16 | Image sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01129655A JPH01129655A (en) | 1989-05-22 |
| JPH0710087B2 true JPH0710087B2 (en) | 1995-02-01 |
Family
ID=17718208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62287505A Expired - Fee Related JPH0710087B2 (en) | 1987-11-16 | 1987-11-16 | Image sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0710087B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59212071A (en) * | 1983-05-18 | 1984-11-30 | Canon Inc | Lighting device for light source |
-
1987
- 1987-11-16 JP JP62287505A patent/JPH0710087B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59212071A (en) * | 1983-05-18 | 1984-11-30 | Canon Inc | Lighting device for light source |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01129655A (en) | 1989-05-22 |
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