JPS619075A - Color reader having black and white mode - Google Patents

Color reader having black and white mode

Info

Publication number
JPS619075A
JPS619075A JP59129888A JP12988884A JPS619075A JP S619075 A JPS619075 A JP S619075A JP 59129888 A JP59129888 A JP 59129888A JP 12988884 A JP12988884 A JP 12988884A JP S619075 A JPS619075 A JP S619075A
Authority
JP
Japan
Prior art keywords
lighting
mode
color
black
white
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.)
Granted
Application number
JP59129888A
Other languages
Japanese (ja)
Other versions
JPH0411065B2 (en
Inventor
Bunichi Nagano
長野 文一
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP59129888A priority Critical patent/JPS619075A/en
Priority to US06/746,762 priority patent/US4691228A/en
Priority to DE8585107705T priority patent/DE3583976D1/en
Priority to EP85107705A priority patent/EP0169383B1/en
Publication of JPS619075A publication Critical patent/JPS619075A/en
Publication of JPH0411065B2 publication Critical patent/JPH0411065B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Facsimile Scanning Arrangements (AREA)
  • Color Image Communication Systems (AREA)

Abstract

PURPOSE:To execute the reading at white/black mode at a high speed than that at color mode by providing a lighting control means lighting sequentially while switching three fluorescent lights at the color mode selection and lighting simultaneously the fluorescent lights at white/black mode selection. CONSTITUTION:Figure shows the time chart at color mode selection. An electric charge at photodetecting section is transferred in parallel with each bit of an analog shift register by using a transfer pulse PHIT to a CCD and a CCD output signal is read via an amplifier circuit 8. A red lighting signal TR, a green lighting signal TG and a blue lighting signal TB are outputted sequentially from the control circuit in synchronizing with the transfer pulse PHIT and the red/green/ blue three fluorescent lights 2-4 are lighted sequentially according to the said output. On the other hand, the lighting signals TR, TG, TB are outputted simultaneously to the three fluorescent lights 2-4 at white/black mode selection, they are lighted simultaneously and the simultaneous lighting is executed at each period of the transfer pulse PHIT. Thus, the time width of the lighting signal is decreased to 1/3 at the color mode.

Description

【発明の詳細な説明】 く技術分野〉 本発明は原稿情報を読み取る装置に関し、特に、色信号
に分解するカラー読み取り、および色信号に分解しない
白黒読み取りの2つのモードを備えた読み取り装置に関
する。
DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an apparatus for reading document information, and more particularly to a reading apparatus that has two modes: color reading that separates the information into color signals, and black and white reading that does not separate the information into color signals.

〈従来技術〉 従来、ドラムスキャナのようなカラー読み取り装置にお
いて、赤、緑、青のフィルタと各フィルタの透過光を受
光する3個の光電変換素子を設けてカラー読み取りを行
うとともに、灰色フィルタとその透過光を受光する第4
の光電変換素子を設けて白黒、中間調の読み取りを行う
装置が多い。
<Prior art> Conventionally, in a color reading device such as a drum scanner, color reading is performed by providing red, green, and blue filters and three photoelectric conversion elements that receive the transmitted light of each filter. The fourth part receives the transmitted light.
Many devices are equipped with photoelectric conversion elements to perform black-and-white and halftone reading.

しかし、このような従来例によれば、カラー用の3個の
光電変換素子の相対的位置合わせが非常に困難であるば
かりか、白黒モードのためにさらにもう1組のフィルタ
と光電変換素子を備えなければならない欠点があった。
However, in this conventional example, not only is it extremely difficult to relatively align the three color photoelectric conversion elements, but also another set of filters and photoelectric conversion elements are required for the monochrome mode. There were drawbacks that I had to prepare for.

〈発明の目的〉 本発明の目的は、単一の光電変換素子により、カラー読
み取りと白黒読み取りの両モードを兼用することができ
、しかも白黒モード時の読み取りをカラーモード時より
も高速に実行する、白黒モ−ドを備えたカラー読み取り
装置を提供することにある。
<Objective of the Invention> An object of the present invention is to enable both color reading and black-and-white reading modes to be performed using a single photoelectric conversion element, and to perform reading in the black-and-white mode faster than in the color mode. An object of the present invention is to provide a color reading device having a black and white mode.

〈解決手段〉 上記目的を達成するため、本発明は、読み取るべき原稿
を照射するための、赤、緑、青の波長帯にそれぞれピー
ク値をもつ3個の蛍光灯と、上記原稿の実像i得る光学
系と、その実像位置に配設された単一の光電変換素子と
、カラーモード又は白黒モードを選択するモード選択手
段と、上記カラーモード選択時には上記3個の蛍光灯を
順次切換え発光させ、上記白黒モード選択時には上記3
個の蛍光灯を一斉発光させる発光制御手段とを有するこ
とを特徴としている。
<Solution Means> In order to achieve the above object, the present invention provides three fluorescent lamps each having a peak value in the red, green, and blue wavelength bands for illuminating the original to be read, and a real image i of the original. a single photoelectric conversion element disposed at the real image position; a mode selection means for selecting a color mode or a black and white mode; and when the color mode is selected, the three fluorescent lamps are sequentially switched to emit light. , when the above black and white mode is selected, the above 3
It is characterized by having a light emission control means for causing all the fluorescent lamps to emit light at the same time.

〈実施例〉 第1図に本発明の全体構成図を示す。読み取るべき原稿
1を照射するための赤、縁、青の3本の蛍光灯2,3.
4が配設され、ミラー5及び凸レンズ6より成る光学系
により原稿の結像面にCOD、         セン
サ7が配設されている。CCDセンサ7の出力信号は、
増幅回路8で増幅され、制御回路9に導入される。制御
回路9はCCDセンサの制御と同期する所定のタイミン
グで蛍光灯点灯回路10に対し、点灯信号を出力する。
<Example> FIG. 1 shows an overall configuration diagram of the present invention. Three fluorescent lights 2, 3, red, edge, and blue, for illuminating the document 1 to be read.
4 is disposed, and a COD and a sensor 7 are disposed on the image forming surface of the original by an optical system consisting of a mirror 5 and a convex lens 6. The output signal of the CCD sensor 7 is
The signal is amplified by the amplifier circuit 8 and introduced into the control circuit 9. The control circuit 9 outputs a lighting signal to the fluorescent lamp lighting circuit 10 at a predetermined timing synchronized with the control of the CCD sensor.

点灯回路10は各蛍光灯をパルス発光させる。制御回路
9にはモード選択ボタン11が接続されている。
The lighting circuit 10 causes each fluorescent lamp to emit pulsed light. A mode selection button 11 is connected to the control circuit 9.

次に作用を説明する。Next, the action will be explained.

第2図にカラーモード選択時のタイムチャートを示す。FIG. 2 shows a time chart when selecting the color mode.

CODへの転送パルスΦ丁により受光部の電荷がアナロ
グシフトレジスフの各ビットへ並列に転送され、その後
、シフトレジスタにより直列に導出され、増幅回路8を
経てCCD出力信号が読み出される。この転送パルスΦ
Tと同期して赤の点灯信号TR1緑の点灯信号TQ、青
の点灯信号TBが制御回路から順次出力され、それに従
って赤、緑、青の3本の蛍光灯2.3.4が順次発光す
る。点灯信号TN 、 Tq 、 T、の各時間幅は各
蛍光灯の光度に応じて予め定められている。
The charge in the light receiving section is transferred in parallel to each bit of the analog shift register by the transfer pulse Φ to the COD, and then serially led out by the shift register, and the CCD output signal is read out via the amplifier circuit 8. This transfer pulse Φ
In synchronization with T, a red lighting signal TR1, a green lighting signal TQ, and a blue lighting signal TB are sequentially output from the control circuit, and the three red, green, and blue fluorescent lamps 2.3.4 sequentially emit light accordingly. do. Each time width of the lighting signals TN, Tq, and T is determined in advance according to the luminous intensity of each fluorescent lamp.

このような順次切換え発光により、CODは転送パルス
Φτで区切られた期間ごとに、赤、緑、、青     
   艶の分解色信号を出力する。
Due to this sequential switching of light emission, the COD changes to red, green, blue, for each period separated by the transfer pulse Φτ.
Outputs glossy separated color signals.

第3図に白黒モード選択時のタイムチャートを示す。こ
のモードにおいて前述したカラーモードと異る点は、3
個の蛍光灯2.3.4に対して点灯信号Tlt 、 ’
rq、 ’rBが一斉に出力され、−斉に発光すること
、その−斉発光が転送パルスΦ1ごとのすべての期間で
実行されること、及び、点灯信号の時間幅が前記したカ
ラーモード時に対し1/3と短くなっていることである
。その結果、原稿の走査速度はカラーモード選択時に比
べて3倍に高速化され、しかも、CCD出力の大きさは
カラーモード選択時と同一であるからCCD出力信号の
処理を共通に行うことができる。
FIG. 3 shows a time chart when black and white mode is selected. This mode differs from the color mode described above in 3 ways.
The lighting signal Tlt,' for the fluorescent lamps 2.3.4
rq, 'rB are output all at once and emit light at the same time, the simultaneous light emission is executed during all periods of each transfer pulse Φ1, and the time width of the lighting signal is different from that in the color mode described above. It is now 1/3 shorter. As a result, the scanning speed of the original is three times faster than when the color mode is selected, and since the size of the CCD output is the same as when the color mode is selected, the CCD output signal can be processed in common. .

〈発明の効果〉 上述した通り、本発明によれば、単一のCODを用いる
だけで、カラー読み取りと白黒読み取りのいずれをも行
うことができ、単一のCODを用いているからCOD相
互の位置合わせが不要であり、白黒モード用の特殊な部
品を備える必要もなく、構成、製作工程ともに簡単化さ
れる。また、白黒モード選択時の走査速度がカラーモー
ド選択時に比べて3倍に高速化され、しかもCCD出力
が同一のため信号処理回路を共通化することができる。
<Effects of the Invention> As described above, according to the present invention, both color reading and black-and-white reading can be performed by using a single COD, and since a single COD is used, the COD reading can be performed easily. There is no need for alignment, and there is no need to provide special parts for monochrome mode, simplifying both the configuration and manufacturing process. Furthermore, the scanning speed when the monochrome mode is selected is three times faster than when the color mode is selected, and since the CCD outputs are the same, the signal processing circuit can be shared.

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

第゛1図・は本発明実施例の全体構成図、第2図は上記
実施例のカラーモード選択時の作用説明図、第3図は白
黒モード選択時の作用説明図である。
FIG. 1 is an overall configuration diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation when the color mode is selected, and FIG. 3 is an explanatory diagram of the operation when the monochrome mode is selected.

Claims (2)

【特許請求の範囲】[Claims] (1)読み取るべき原稿を照射するための赤、緑、青の
波長帯にそれぞれピーク値をもつ3個の蛍光灯と、上記
原稿の実像を得る光学系と、その実像位置に配設された
単一の光電変換素子と、カラーモード又は白黒モードを
選択するモード選択手段と、上記カラーモード選択時に
は上記3個の蛍光灯を順次切換え発光させ、上記白黒モ
ード選択時には上記3個の蛍光灯を一斉に発光させる発
光制御手段とを有する、白黒モードを備えたカラー読み
取り装置。
(1) Three fluorescent lamps with peak values in the red, green, and blue wavelength bands for illuminating the original to be read, an optical system for obtaining a real image of the original, and an optical system installed at the position of the real image. A single photoelectric conversion element, a mode selection means for selecting a color mode or a black and white mode, and when the color mode is selected, the three fluorescent lamps are sequentially switched to emit light, and when the black and white mode is selected, the three fluorescent lamps are turned off. A color reading device with a monochrome mode and a light emission control means that causes light to emit light all at once.
(2)白黒モードが選択されているときの蛍光灯の駆動
信号時間幅が、カラーモード時の1/3である、特許請
求の範囲第1項記載のカラー読み取り装置。
(2) The color reading device according to claim 1, wherein the time width of the drive signal for the fluorescent lamp when the monochrome mode is selected is 1/3 that of the color mode.
JP59129888A 1984-06-22 1984-06-22 Color reader having black and white mode Granted JPS619075A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP59129888A JPS619075A (en) 1984-06-22 1984-06-22 Color reader having black and white mode
US06/746,762 US4691228A (en) 1984-06-22 1985-06-20 Image reader
DE8585107705T DE3583976D1 (en) 1984-06-22 1985-06-21 IMAGE READER.
EP85107705A EP0169383B1 (en) 1984-06-22 1985-06-21 Image reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59129888A JPS619075A (en) 1984-06-22 1984-06-22 Color reader having black and white mode

Publications (2)

Publication Number Publication Date
JPS619075A true JPS619075A (en) 1986-01-16
JPH0411065B2 JPH0411065B2 (en) 1992-02-27

Family

ID=15020822

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59129888A Granted JPS619075A (en) 1984-06-22 1984-06-22 Color reader having black and white mode

Country Status (1)

Country Link
JP (1) JPS619075A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63163815U (en) * 1987-04-16 1988-10-26
WO1999033256A1 (en) * 1997-12-19 1999-07-01 Rohm Co., Ltd. Color image reader

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63163815U (en) * 1987-04-16 1988-10-26
WO1999033256A1 (en) * 1997-12-19 1999-07-01 Rohm Co., Ltd. Color image reader
EP0961474A1 (en) * 1997-12-19 1999-12-01 Rohm Co., Ltd. Color image reader
US6414652B1 (en) 1997-12-19 2002-07-02 Rohm Co., Ltd. Color image reader
EP0961474A4 (en) * 1997-12-19 2005-06-29 Rohm Co Ltd Color image reader

Also Published As

Publication number Publication date
JPH0411065B2 (en) 1992-02-27

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