JPH03178262A - Charge transfer method in charger transfer element - Google Patents
Charge transfer method in charger transfer elementInfo
- Publication number
- JPH03178262A JPH03178262A JP1318420A JP31842089A JPH03178262A JP H03178262 A JPH03178262 A JP H03178262A JP 1318420 A JP1318420 A JP 1318420A JP 31842089 A JP31842089 A JP 31842089A JP H03178262 A JPH03178262 A JP H03178262A
- Authority
- JP
- Japan
- Prior art keywords
- charge transfer
- charge
- photoelectric conversion
- picture
- ccd
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Solid State Image Pick-Up Elements (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Facsimile Heads (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電荷転送素子を用いた固体撮像素子に関し、特
にカラー用１次元の電荷転送素子に釦ける電荷転送方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solid-state image pickup device using a charge transfer device, and particularly to a charge transfer method for buttoning a color one-dimensional charge transfer device.
従来のカラー用固体撮像素子に訃ける１次元電荷転送素
子の電荷転送の方法を第２図を用いて説明する。従来は
、第２図に示すように、赤、緑および青の３画素に対応
して１次元プレイ状に配列された光電変換素子からなる
各々の光電変換部１゜２．３と、これら光電変換部１〜
３で変換された信号電荷をそれぞれ蓄積して一方向に順
次転送するための電荷転送素子（以下ＣＯＤと略称する
）４とトランスファゲート５からなる電荷転送部８によ
シカラー用１次元電荷転送素子を構成する。そしてこの
素子を駆動するに際し、各々の光電変換部１〜３に光（
赤、緑、青）が入ってくると、この光は各光電変換部１
〜３で電子・正孔対に変換され、その電子が信号電荷と
して蓄積される。この蓄積された電子は、トランスファ
ゲート５をオンすることによってＣＣＤ ４に一斉に移
され、さらに該ＣＣＤ ４に高周波のクロックをかける
ことで、その信号電荷が一方向に独立して順次転送され
る。A charge transfer method of a one-dimensional charge transfer device, which is a substitute for a conventional color solid-state image pickup device, will be explained with reference to FIG. Conventionally, as shown in FIG. 2, each photoelectric conversion unit 1°2.3 consists of photoelectric conversion elements arranged in a one-dimensional play shape corresponding to three pixels of red, green, and blue, and these photoelectric conversion units 1.2. Conversion part 1~
A one-dimensional charge transfer element for color is formed by a charge transfer unit 8 consisting of a charge transfer element (hereinafter abbreviated as COD) 4 and a transfer gate 5 for accumulating the signal charges converted in step 3 and sequentially transferring them in one direction. Configure. When driving this element, light (
When light (red, green, blue) enters, this light passes through each photoelectric conversion unit 1.
~3, it is converted into an electron-hole pair, and the electron is accumulated as a signal charge. These accumulated electrons are transferred all at once to the CCD 4 by turning on the transfer gate 5, and by applying a high frequency clock to the CCD 4, the signal charges are transferred independently and sequentially in one direction. .
これによう、その最終端に設けられた信号検出部（図示
せず）にてカラーの画像信号を取シ出すようになされて
いる。In this way, a color image signal is extracted at a signal detection section (not shown) provided at the final end.
しかし、上述した従来の電荷転送素子の電荷転送は以上
のように実施されるので、カラー画像を得るためのＣＣ
Ｄで白黒画像を得る場合においても、同一の周波数の高
周波において、カラー画像を得る場合と同じ時間がかか
つてしまうという問題があった。However, since the charge transfer of the conventional charge transfer device described above is performed as described above, the CC
Even when obtaining a monochrome image using D, there is a problem in that it takes the same amount of time as when obtaining a color image at the same high frequency.
本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、カラー用の１次元電荷転送素子において白黒画
像を得る場合に、カラー画像の１７３の時間で電荷の転
送を可能にすることを目的とする。The present invention has been made to solve the above-mentioned problems, and has an object to enable charge transfer in a time period of 173 times of a color image when a black and white image is obtained using a color one-dimensional charge transfer element. With the goal.
本発明に係る電荷転送素子の電荷転送方法は、光電変換
素子からなる画素を１次元アレイ状に並べた光電変換部
と、該光電変換部の両側に平行に配置されたカラーモー
ド用の第１の電荷転送部および白黒モード用の第２の電
荷転送部から固体撮像素子を構成し、前記第１の電荷転
送素子は各画素の電荷を独立に転送し、前記第２の電荷
転送素子は複数個の画素の組の電荷の少なくとも一部を
ひとつの電荷パケットとして転送するようにしたもので
ある。The charge transfer method for a charge transfer device according to the present invention includes a photoelectric conversion section in which pixels each consisting of a photoelectric conversion element are arranged in a one-dimensional array, and a first color mode converter arranged in parallel on both sides of the photoelectric conversion section. A solid-state image sensor is configured from a charge transfer section and a second charge transfer section for monochrome mode, the first charge transfer device independently transfers the charge of each pixel, and the second charge transfer device transfers the charge of each pixel independently. At least a part of the charge of each set of pixels is transferred as one charge packet.
本発明に釦いては、１次元プレイ状の光電変換部の両側
に設けｆｃ２つの電荷転送部のうち、１つの電荷転送素
子（ＣＯＤ）は従来通シカラー画像を得るのに用い、も
う１つの電荷転送素子（ＣＯＤ）は白黒画像専用とする
ことにより、カラー用の一次元電荷転送素子で白黒画像
を得る場合にその白黒モードの段数が少なくなるので、
転送時間を従来ようも短かくすることができる。In the present invention, among the two charge transfer sections fc provided on both sides of a one-dimensional play-shaped photoelectric conversion section, one charge transfer device (COD) is conventionally used to obtain a unicolor image, and the other By using the transfer device (COD) exclusively for monochrome images, the number of steps in monochrome mode is reduced when obtaining a monochrome image using a color one-dimensional charge transfer device.
Transfer time can be made shorter than conventional methods.
以下、本発明の実施例を図について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例による電荷転送素子の電荷転
送方法を説明するための模式図であシ、ここでは光電変
換部とＣＣＤ部の概略的な平面構造を示している。この
実施例が第２図に示した従来例のものと異なる点は、赤
、緑唱よび青の３画素に対応して１次元プレイ状に配列
てれた光電変換部１〜３の両側に平行に配置された第１
＆よび第２の電荷転送部８，９を設け、この第２の電荷
転送部９は白黒読み出し専用ＣＣＤ ６とトランスファ
ゲート７から構成して白黒モード用とし、第１の電荷転
送部８はカラーモード用として用いるようにしたことで
ある。−１１−釦、図中同一符号は同一または相当部分
を示している。FIG. 1 is a schematic diagram for explaining a charge transfer method of a charge transfer element according to an embodiment of the present invention, and here shows a schematic planar structure of a photoelectric conversion section and a CCD section. The difference between this embodiment and the conventional example shown in FIG. The first parallel
& and second charge transfer sections 8 and 9 are provided, the second charge transfer section 9 is composed of a monochrome read-only CCD 6 and a transfer gate 7 for monochrome mode, and the first charge transfer section 8 is for color mode. It was designed to be used as a mode. -11- Button, the same reference numerals in the figures indicate the same or corresponding parts.
このように上記実施例によると、１次元アレイ状の光電
変換部１〜３の両側に第１および第２の電荷転送部８，
９を設けることによシ、第１の電荷転送部８のＣＣＤ
４は従来と同様にカラー画像を得るのに使用し、第２の
電荷転送部９のＣＣＤ ６は白黒画像専用に使用できる
。これによって、前記ＣＣＤ ６は、赤、緑および青の
３画素１組の光電変換部１〜３に対して、そのうちのひ
とつの電荷または３画素の混合された電荷を単位として
転送することによシ、カラー画像時の転送に対して段数
が１／３になう１同じ周波数の高周波において転送時間
が従来の１／３になる。In this way, according to the above embodiment, the first and second charge transfer sections 8,
By providing 9, the CCD of the first charge transfer section 8
4 can be used to obtain a color image as in the conventional case, and the CCD 6 of the second charge transfer section 9 can be used exclusively for monochrome images. Accordingly, the CCD 6 transfers the charge of one of the three pixels or the mixed charge of the three pixels as a unit to the photoelectric conversion units 1 to 3 of one set of three pixels of red, green, and blue. 2. The number of stages is reduced to 1/3 compared to the case of color image transfer. 1. At the same high frequency, the transfer time is reduced to 1/3 of the conventional one.
なお、上記実施例では３画素１組の光電変換部１〜３に
対してそのうちのひとつの電荷、または３画素の混合さ
れた電荷を単位（パケット）として転送する場合につい
て示したが、本発明は、これに限らず、３画素の電荷の
うち工ないし２画素の電荷を混合してひとつの電荷パケ
ットとして転送したう、あるいは３画素の電荷のうち工
ないし２画素の電荷を混合して第２の電荷転送素子へ移
動させ、残シの画素の電荷は第１の電荷転送素子へ移動
させることもできる。In addition, in the above embodiment, the case where one charge of one of the three pixels or a mixed charge of the three pixels is transferred as a unit (packet) to the photoelectric conversion units 1 to 3 of one set of three pixels is shown, but the present invention However, the present invention is not limited to this, but it is possible to mix the charges of 1 to 2 pixels out of the charges of 3 pixels and transfer them as one charge packet, or to mix the charges of 1 to 2 pixels out of the charges of 3 pixels and transfer them as a single charge packet. It is also possible to move the charges of the remaining pixels to the second charge transfer element and move the charges of the remaining pixels to the first charge transfer element.
以上のように本発明によれば、カラー用−次元電荷転送
素子において白黒モード専用ＣＯＤを設けたことによシ
、白黒モードの転送時間が従来の１／３になシ、これに
よって、白黒画像の高速読み出しが可能になる効果があ
る。As described above, according to the present invention, by providing a COD exclusively for monochrome mode in a color charge transfer element, the transfer time in monochrome mode is reduced to 1/3 of the conventional one, and thereby, monochrome images can be imaged. This has the effect of enabling high-speed reading.
第１図は本発明の一実施例を説明するための模式図、第
２図は従来の方法を説明するための模式図である。
１．２．３・・・・光電変換部、４・◆・・カラ−モー
ド用電荷転送素子（ＣＯＤ）、５ 、７・・・・トラン
スファゲート、６・・・・白黒モード用電荷転送素子（
ＣＣＤ）、８・・・・第１の電荷転送部、９・・・・第
２の電荷転送部。FIG. 1 is a schematic diagram for explaining an embodiment of the present invention, and FIG. 2 is a schematic diagram for explaining a conventional method. 1.2.3...Photoelectric conversion unit, 4...Charge transfer device (COD) for color mode, 5, 7...Transfer gate, 6...Charge transfer device for monochrome mode (
CCD), 8...first charge transfer section, 9...second charge transfer section.
Claims (1)
電変換部と、該光電変換部の両側に平行に配置されたカ
ラーモード用の第１の電荷転送部および白黒モード用の
第２の電荷転送部から固体撮像素子を構成し、前記第１
の電荷転送素子は各画素の電荷を独立に転送し、前記第
２の電荷転送素子は複数個の画素の組の電荷の少なくと
も一部をひとつの電荷パケットとして転送することを特
徴とする電荷転送素子における電荷転送方法。A photoelectric conversion section in which pixels made of photoelectric conversion elements are arranged in a one-dimensional array, a first charge transfer section for color mode and a second charge transfer section for black and white mode arranged in parallel on both sides of the photoelectric conversion section. A solid-state image sensor is configured from the transfer section, and the first
The charge transfer element transfers the charge of each pixel independently, and the second charge transfer element transfers at least a part of the charge of a set of a plurality of pixels as one charge packet. Charge transfer method in devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1318420A JPH03178262A (en) | 1989-12-06 | 1989-12-06 | Charge transfer method in charger transfer element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1318420A JPH03178262A (en) | 1989-12-06 | 1989-12-06 | Charge transfer method in charger transfer element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03178262A true JPH03178262A (en) | 1991-08-02 |
Family
ID=18098956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1318420A Pending JPH03178262A (en) | 1989-12-06 | 1989-12-06 | Charge transfer method in charger transfer element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03178262A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0698994B1 (en) * | 1994-08-23 | 2000-02-02 | Hewlett-Packard Company | Sensor assembly providing gray scale and color for an optical image scanner |
| US6046829A (en) * | 1996-12-13 | 2000-04-04 | Fuji Xerox Co., Ltd. | Solid-State imaging element and image reading device |
-
1989
- 1989-12-06 JP JP1318420A patent/JPH03178262A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0698994B1 (en) * | 1994-08-23 | 2000-02-02 | Hewlett-Packard Company | Sensor assembly providing gray scale and color for an optical image scanner |
| US6046829A (en) * | 1996-12-13 | 2000-04-04 | Fuji Xerox Co., Ltd. | Solid-State imaging element and image reading device |
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