JPH04150482A - Solid-state image pickup device - Google Patents
Solid-state image pickup deviceInfo
- Publication number
- JPH04150482A JPH04150482A JP2274005A JP27400590A JPH04150482A JP H04150482 A JPH04150482 A JP H04150482A JP 2274005 A JP2274005 A JP 2274005A JP 27400590 A JP27400590 A JP 27400590A JP H04150482 A JPH04150482 A JP H04150482A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- signal
- vertical transfer
- color difference
- solid
- 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
Links
- 238000003384 imaging method Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000001629 suppression Effects 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 4
Landscapes
- Solid State Image Pick-Up Elements (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Color Television Image Signal Generators (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、外部装置から垂直転送パルスと同時に、色差
信号の軸方向を制御することが可能な固体撮像装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a solid-state imaging device capable of controlling the axial direction of a color difference signal simultaneously with a vertical transfer pulse from an external device.
従来の技術
近年、固体撮像素子を用いたビデオカメラ、電子スチル
カメラは、小型・軽量・高画質・多機能・低価格といっ
たところに開発の主眼が置かれている。BACKGROUND OF THE INVENTION In recent years, development of video cameras and electronic still cameras using solid-state image sensors has focused on small size, light weight, high image quality, multifunctionality, and low cost.
まず、第４図に従来の固体撮像装置のシステムを示す。First, FIG. 4 shows a conventional solid-state imaging device system.
固体撮像装置は、固体撮像素子１８．垂直転送制御部１
９．固体撮像素子駆動用信号発生部２０．信号処理部２
１より構成され、固体撮像素子１８は、光電変換素子１
４．垂直転送部１５゜水平転送部１６．信号電荷検出部
１７より成っている。The solid-state imaging device includes a solid-state imaging device 18. Vertical transfer control unit 1
9. Solid-state image sensor driving signal generation section 20. Signal processing section 2
1, the solid-state image sensor 18 includes a photoelectric conversion element 1
4. Vertical transfer section 15° horizontal transfer section 16. It consists of a signal charge detection section 17.
第５図に、信号発生部２０にある、従来の色差信号認識
パルス（以下、ＦＨ２パルスと略す。）作成回路の構成
例を示す。FIG. 5 shows a configuration example of a conventional color difference signal recognition pulse (hereinafter abbreviated as FH2 pulse) generation circuit in the signal generation section 20.
ＦＨ２パルスは、水平同期信号（以下、ＨＤと略す。〉
をＴフリップフロップ２２等で、１／２分周することで
作成される。The FH2 pulse is a horizontal synchronization signal (hereinafter abbreviated as HD).
It is created by dividing the frequency by 1/2 using a T flip-flop 22 or the like.
以下、ＦＨ２パルスのタイミングについて第６図を参照
しながら説明する。The timing of the FH2 pulse will be explained below with reference to FIG.
第６図は、テレビ信号の映像期間におけるＨ Ｄ、ＦＨ
２パルス、および４つの垂直転送パルスすなわち垂直転
送部第１ゲート印加パルス（以下、φＶ１パルスと略す
。）、垂直転送部第２ゲート印加パルス（以下、φＶ２
パルスと略す。）、垂直転送部第３ゲート印加パルス（
以下、φＶ３パルスと略す。）、垂直転送部第４ゲート
印加パルス（以下、φＶ４パルスと略す。）を示してい
る。Figure 6 shows HD, FH in the video period of the television signal.
2 pulses, and four vertical transfer pulses, namely, vertical transfer section first gate application pulse (hereinafter abbreviated as φV1 pulse), vertical transfer section second gate application pulse (hereinafter referred to as φV2 pulse),
Abbreviated as pulse. ), vertical transfer section third gate application pulse (
Hereinafter, it will be abbreviated as φV3 pulse. ), which shows the vertical transfer section fourth gate application pulse (hereinafter abbreviated as φV4 pulse).
ＦＨ２パルスは、ＨＤが入力される毎に論理を反転する
。The FH2 pulse inverts its logic every time HD is input.
そして、垂直転送パルスにより転送され、固体撮像素子
から出力された信号電荷により作成された各水平走査期
間における色差信号の軸方向が、２Ｒ−ＧかＧ−２Ｂか
をＦＨ２パルスの論理により認識し、信号処理回路で色
処理を行う。Then, it is recognized by the logic of the FH2 pulse whether the axial direction of the color difference signal in each horizontal scanning period, which is transferred by the vertical transfer pulse and created by the signal charge output from the solid-state image sensor, is 2R-G or G-2B. , the signal processing circuit performs color processing.
このように処理を行い、カラーのテレビ信号を作成する
。The processing is performed in this way to create a color television signal.
発明が解決しようとする課題
しかしながら上記のような構成では、手ぶれ防止機能や
電子ズーム等で外部からの制御信号により、奇数段数だ
け垂直転送パルスが抑圧された場合に、色差信号の軸方
向が逆になる。Problems to be Solved by the Invention However, with the above configuration, when the vertical transfer pulse is suppressed by an odd number of steps due to an external control signal such as an anti-shake function or electronic zoom, the axial direction of the color difference signal may be reversed. become.
本発明は、上記欠点に鑑み、垂直転送パルスを抑圧する
と同時に、色差信号を認識するパルスの論理変化を抑圧
することが可能な固体撮像装置を提供することを目的と
する。SUMMARY OF THE INVENTION In view of the above drawbacks, it is an object of the present invention to provide a solid-state imaging device capable of suppressing vertical transfer pulses and at the same time suppressing logical changes in pulses for recognizing color difference signals.
課題を解決するための手段
上記目的を達成するために、本発明の固体撮像装置は、
外部装置から入力される制御信号により、水平帰線期間
内の前記固体撮像素子の垂直転送部に印加される垂直転
送用パルスを抑圧する回路、前記垂直転送パルス抑圧と
同時に、色差信号を認識するパルスの論理変化を抑圧す
る回路を備えている。Means for Solving the Problems In order to achieve the above object, the solid-state imaging device of the present invention includes:
A circuit that suppresses vertical transfer pulses applied to the vertical transfer section of the solid-state image sensor during the horizontal retrace period according to a control signal input from an external device, and simultaneously recognizes a color difference signal while suppressing the vertical transfer pulses. Equipped with a circuit that suppresses pulse logic changes.
作用
この構成により、垂直転送段数に合わせて色差信号認識
パルスを制御して、正しい色差信号の軸方向を得ること
ができる。Effect: With this configuration, the color difference signal recognition pulse can be controlled in accordance with the number of vertical transfer stages to obtain the correct axial direction of the color difference signal.
実施例
以下、本発明の一実施例について、図面を参照しながら
説明する。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は、本発明における固体撮像装置のシステム図で
ある。FIG. 1 is a system diagram of a solid-state imaging device according to the present invention.
本発明における固体撮像装置は、固体撮像素子５、垂直
転送制御装置６．固体撮像素子駆動用信号発生部７．信
号処理部８．信号処理用パルス制御部９．ＦＨ２制御部
１０より構成され、固体撮像素子５は、光電変換素子１
．垂直転送部２．水平転送部３．信号電荷検出部４より
成る。The solid-state imaging device according to the present invention includes a solid-state imaging device 5, a vertical transfer control device 6. Solid-state image sensor driving signal generation section 7. Signal processing section 8. Signal processing pulse control section 9. The solid-state image sensor 5 is composed of an FH2 control section 10, and the photoelectric conversion element 1
．． Vertical transfer section 2. Horizontal transfer section 3. It consists of a signal charge detection section 4.
第２図は、本発明におけるＦＨ２パルス制御回路とＦＨ
２パルス作成回路の構成例であるが、Ｔフリップフロッ
プ１１とＡＮＤゲート１２から構成されている。FIG. 2 shows the FH2 pulse control circuit and the FH2 pulse control circuit in the present invention.
This is an example of the configuration of a two-pulse generating circuit, which is composed of a T flip-flop 11 and an AND gate 12.
第３図（ａ）は、テレビ信号用の水平同期信号ＨＤ、外
部からの転送制御信号〈以下、ＣＴＲＬパルスと略す。FIG. 3(a) shows a horizontal synchronizing signal HD for a television signal and an external transfer control signal (hereinafter abbreviated as CTRL pulse).
〉、本発明におけるＦＨ２パルス、固体撮像素子駆動パ
ルスφＶｌ、φＶ２．φＶ３゜φＶ４、ＣＣＤ出力信号
、輝度信号２色差信号（（２Ｒ−Ｇ）＋（２Ｂ−Ｇ））
、色差信号（２Ｒ−Ｇ）。>, FH2 pulse in the present invention, solid-state image sensor drive pulse φVl, φV2. φV3゜φV4, CCD output signal, luminance signal 2 color difference signals ((2R-G) + (2B-G))
, color difference signal (2R-G).
色差信号（２Ｂ−Ｇ）およびカラーテレビ信号の諸電圧
を示し、同（ｂ）は、このうち駆動パルスの詳細を示す
。Various voltages of the color difference signal (2B-G) and the color television signal are shown, and (b) shows the details of the drive pulse.
ＣＴＲＬパルスがＬ“°レベルの時、ＦＨ２パルスは、
ＨＤの入力毎に論理を反転する。また、垂直転送パルス
φＶ１．φＶ２．φＶ３．φＶ４もＨＤの入力毎に出力
される。When the CTRL pulse is at L"° level, the FH2 pulse is
The logic is inverted for each HD input. Also, the vertical transfer pulse φV1. φV2. φV3. φV4 is also output for each HD input.
ここで、ＣＴＲＬパルスがＨ”レベルになると、ＡＮＤ
ゲートによりＨＤ大入力抑圧され、ＦＨ２パルスの論理
反転は起こら゛ない。また、垂直転送パルス３も出力さ
れない。Here, when the CTRL pulse becomes H” level, AND
The HD large input is suppressed by the gate, and logic inversion of the FH2 pulse does not occur. Further, vertical transfer pulse 3 is also not output.
垂直転送パルス１３により転送され、信号電荷検出部４
より出力されたＣＣＤ出力信号は、ロウパスフィルタを
通すことによって、輝度信号に変換される。Transferred by the vertical transfer pulse 13, the signal charge detection unit 4
The CCD output signal is converted into a luminance signal by passing it through a low-pass filter.
また、別にバンドパスフィルタ・色サンプリング回路を
通すことによって、−走査線毎に２Ｒ−Ｇ。Also, by separately passing a bandpass filter/color sampling circuit, -2R-G for each scanning line.
２Ｂ−Ｇの繰り返し色差信号になる。It becomes a 2B-G repeated color difference signal.
このようにして得られた、色差信号はＩＨ遅延線を通し
、ＩＨ遅延線を通した信号と通さない信号をＰＨ２パル
スでそれぞれ選択することにより同時化を行う。例えば
、ＰＨ２がＬ“°レベルの時はＩＨ遅延線出力を２Ｂ−
Ｇ出力に接続、ＩＨ遅延前信号を２Ｒ−Ｇ出力に接続、
ＰＨ２が°’Ｈ“レベルの時はＩＨ遅延線出力を２Ｒ−
Ｇ出力に接続、ＩＨ遅延前出力を２８−Ｇ出力に接続す
る。The color difference signals obtained in this manner are passed through an IH delay line, and the signals passed through the IH delay line and the signals not passed are selected by PH2 pulses to perform synchronization. For example, when PH2 is at L"° level, the IH delay line output is set to 2B-
Connect to G output, connect IH pre-delay signal to 2R-G output,
When PH2 is at °'H" level, the IH delay line output is set to 2R-
Connect to the G output, and connect the IH pre-delay output to the 28-G output.
このように同時化して、２つの出力信号に常に２Ｒ−Ｇ
、２Ｂ−Ｇ方向の色差信号がそれぞれ出力されるよう変
換される。By synchronizing in this way, the two output signals always have 2R-G.
, 2B-G direction color difference signals are respectively output.
この色差信号を変調し、輝度信号・同期信号を加えカラ
ーのテレビ信号を作成する。This color difference signal is modulated and a brightness signal and synchronization signal are added to create a color television signal.
また、ＣＴＲＬパルスにより間引きされた部分は、ＩＨ
前の信号などを利用して補間を行う。Also, the part thinned out by the CTRL pulse is
Interpolation is performed using the previous signal.
このように処理を行い、カラーのテレビ信号を作成する
。The processing is performed in this way to create a color television signal.
この結果、固体撮像素子の駆動による手ぶれ機能や電子
ズーム等での垂直転送パルスの抑圧に伴う、色差信号の
軸方向反転は発生しない。As a result, axial reversal of the color difference signal does not occur due to the camera shake function caused by driving the solid-state image sensor or the suppression of vertical transfer pulses in electronic zoom or the like.
本実施例では、ＴフリップフロップとＡＮＤゲートによ
る回路構成例を説明したが、他のロジック回路でも構わ
ない。In this embodiment, an example of a circuit configuration using a T flip-flop and an AND gate has been described, but other logic circuits may be used.
発明の効果
以上のように、本発明では、垂直転送の抑圧に合わせて
色差信号の認識パルスを制御することが可能である。Effects of the Invention As described above, in the present invention, it is possible to control the recognition pulse of the color difference signal in accordance with the suppression of vertical transfer.
第１図は本発明固体撮像装置のシステム構成を示す回路
図、第２図は本発明におけるＦ Ｉ−１２パルス制御回
路の回路図、第３図（ａ）はテレビ信号用の水平同期信
号と外部からのＩ＋制御信号、本発明におけるＰＨ２パ
ルスと固体撮像素子の駆動パルスの波形図、同（ｂ）は
、そのφＶ１ないしφＶ４パルスの詳しい波形図、第４
図は従来例固体撮像装置のシステム構成の回路図、第５
図は従来例におけるＰＨ２パルス作成回路の回路図、第
６図はテレビ信号用の水平同期信号、従来例におけるＰ
Ｈ２パルスと固体撮像素子の駆動パルスの波形図であ
る。
１．１４・・・・・・光電変換素子、２，１５・・・・
・・垂直転送部、３，１６・・・・・・水平転送部、４
，１７・・・・・・信号電荷検出部、５，１８・・・・
・・固体撮像素子、６．１９・・・・・・垂直転送制御
部、７，２０・・・・・・信号発生部、８，２１・・・
・・・信号処理部、９・・・・・・信号処理用パルス制
御部、１０・・・・・・ＰＨ２制御２２・・・・・・Ｔ
フリップフロップ、１２・・・・・・ＡＮＤゲート、１
３．２３・・・・・・垂直転送パルス。Figure 1 is a circuit diagram showing the system configuration of the solid-state imaging device of the present invention, Figure 2 is a circuit diagram of the FI-12 pulse control circuit of the present invention, and Figure 3 (a) shows the horizontal synchronizing signal for television signals. A waveform diagram of an external I+ control signal, a PH2 pulse in the present invention, and a drive pulse for the solid-state image sensor; FIG.
The figure is a circuit diagram of the system configuration of a conventional solid-state imaging device.
The figure is a circuit diagram of a PH2 pulse generation circuit in a conventional example, and Figure 6 shows a horizontal synchronizing signal for a television signal,
FIG. 3 is a waveform diagram of an H2 pulse and a drive pulse for a solid-state image sensor. 1.14...Photoelectric conversion element, 2,15...
...Vertical transfer section, 3, 16...Horizontal transfer section, 4
, 17... signal charge detection section, 5, 18...
...Solid-state image sensor, 6.19...Vertical transfer control section, 7,20...Signal generation section, 8,21...
...Signal processing unit, 9...Signal processing pulse control unit, 10...PH2 control 22...T
Flip-flop, 12...AND gate, 1
3.23... Vertical transfer pulse.
Claims (1)
、前記光電変換部に蓄積される信号電荷を垂直方向に転
送する垂直転送部、前記垂直転送部から転送される信号
電荷を水平方向に転送する水平転送部、前記水平転送部
からの信号電荷を信号電圧または信号電流に変換して出
力する信号電荷検出部を有する固体撮像素子と、外部装
置から入力される制御信号により水平帰線消去期間内の
前記固体撮像素子の垂直転送部に印加される垂直転送用
パルスを抑圧する回路と、前記垂直転送パルス抑圧と同
時に色差信号認識パルスの論理変化を抑圧する回路とを
備えた固体撮像装置。A photoelectric conversion section in which a plurality of photoelectric conversion elements are two-dimensionally arranged; a vertical transfer section that transfers signal charges accumulated in the photoelectric conversion section in a vertical direction; and a vertical transfer section that transfers signal charges transferred from the vertical transfer section in a horizontal direction. A solid-state image pickup device has a horizontal transfer section that transfers the signal charge to the horizontal transfer section, a signal charge detection section that converts the signal charge from the horizontal transfer section into a signal voltage or signal current and outputs the signal charge, and a horizontal retrace line that is controlled by a control signal input from an external device. A solid-state imaging device comprising: a circuit that suppresses a vertical transfer pulse applied to the vertical transfer section of the solid-state image sensor during an erasing period; and a circuit that suppresses a logical change in a color difference signal recognition pulse at the same time as suppressing the vertical transfer pulse. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2274005A JP2690186B2 (en) | 1990-10-11 | 1990-10-11 | Solid-state imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2274005A JP2690186B2 (en) | 1990-10-11 | 1990-10-11 | Solid-state imaging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04150482A true JPH04150482A (en) | 1992-05-22 |
| JP2690186B2 JP2690186B2 (en) | 1997-12-10 |
Family
ID=17535626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2274005A Expired - Fee Related JP2690186B2 (en) | 1990-10-11 | 1990-10-11 | Solid-state imaging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2690186B2 (en) |
-
1990
- 1990-10-11 JP JP2274005A patent/JP2690186B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2690186B2 (en) | 1997-12-10 |
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