JPS62269588A - Color separating filter - Google Patents

Color separating filter

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Publication number
JPS62269588A
JPS62269588A JP61112644A JP11264486A JPS62269588A JP S62269588 A JPS62269588 A JP S62269588A JP 61112644 A JP61112644 A JP 61112644A JP 11264486 A JP11264486 A JP 11264486A JP S62269588 A JPS62269588 A JP S62269588A
Authority
JP
Japan
Prior art keywords
color filter
color
rows
row
column
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
Application number
JP61112644A
Other languages
Japanese (ja)
Inventor
Masao Hiramoto
政夫 平本
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics 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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP61112644A priority Critical patent/JPS62269588A/en
Publication of JPS62269588A publication Critical patent/JPS62269588A/en
Pending legal-status Critical Current

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  • Color Television Image Signal Generators (AREA)

Abstract

PURPOSE:To eliminate the influence of a color characteristic due to the positional shift of a color filter and to improve a characteristic by constituting the color element of the color filter by the repeating of two colors respectively by the 1/2 pitch of a picture element pitch in a vertical direction and equal to the picture element pitch in a horizontal direction, to the respective picture elements of a solid-state image pickup element. CONSTITUTION:The color element of the color filter is constituted by repeating two colors respectively like cyan (Cy) and yellow (Ye) for one row, three rows, five rows and seven rows, in the same way, Magenta (Mg) and green (G) for two rows and four rows and the green (G) and the Magenta (Mg) for six rows and eight rows in the same way. At the time of loading the color filter, the color filter is loaded so that respective color elements of the color filter can be positioned at the center of respective picture elements of the corresponding image pickup element. Thus, even when the more or less mounting shift of the color filter occurs, the signal quantity received by respective picture elements does not be changed. Even concerning to a color characteristic, it is not necessary to provide a shading separator between vertical picture elements of the image pickup element, therefore, the element sensitivity can be raised and for that much, the color characteristic is improved as well.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、単板式カラー固体カメラに用いることのでき
る色分離フィルタ（以下、色フィルタと略す）に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a color separation filter (hereinafter abbreviated as a color filter) that can be used in a single-plate color solid-state camera.

（従来の技術） カラー固体撮像索子に用いられている色フィルタは、カ
ラー画質を決定する大きな要因で、色再現性の良い最近
の色フィルタは、第２図に示すように、固体撮像索子の
１画素に複数個の色フィルタを対応させる多分割色フィ
ルタ方式が用いられている。（森村二改良型色差順次単
板カラー化方式　ＴＶ学会誌、　３７．　Ｎｏ、　１．
０１９８３）従来の固体撮像素子の色フィルタを第２図
により説明する。第２図は従来の色フィルタの構成図で
、色フィルタ要素としてマゼンタ（Ｍｇ）　、緑（Ｇ）
。(Prior art) Color filters used in color solid-state imaging devices are a major factor in determining color image quality, and recent color filters with good color reproducibility are used in solid-state imaging devices, as shown in Figure 2. A multi-division color filter method is used in which a plurality of color filters are associated with one child pixel. (Morimura 2 Improved Color Difference Sequential Single Panel Colorization System, Television Society Journal, 37. No. 1.
01983) A color filter of a conventional solid-state image sensor will be explained with reference to FIG. Figure 2 is a configuration diagram of a conventional color filter, with magenta (Mg) and green (G) as color filter elements.
.

黄（Ｙｅ）及びシアン（Ｃｙ）を用いている。Yellow (Ye) and cyan (Cy) are used.

第２図において、　１１は色フィルタ、１２は固体撮像
素子の画素でその領域を破線で示している。第２図に示
すように、固体撮像素子の各画素は異なる２種類の色フ
ィルタ要素により２分割されている。In FIG. 2, reference numeral 11 indicates a color filter, and 12 indicates a pixel of a solid-state image pickup device, the area of which is indicated by a broken line. As shown in FIG. 2, each pixel of the solid-state image sensor is divided into two by two different types of color filter elements.

この色フィルタを用いた固体撮像素子では、第１フイー
ルドのｎ行で１／２　（Ｍｇ　＋　Ｃｙ）、１．／２（
Ｙｅ　＋　Ｇ　）の信号を、ｎ＋１行で１／２（Ｃｙ＋
Ｇ）、１／２（Ｍｇ＋Ｙｅ）の信号を得ることができ、
それら信号の差をとることにより次に示す色差信号Ｃ１
，Ｃ２を得ることができる。In a solid-state image sensor using this color filter, 1/2 (Mg + Cy), 1. /2(
The signal of Ye + G) is divided by 1/2 (Cy+
G), 1/2 (Mg+Ye) signal can be obtained,
By taking the difference between these signals, the following color difference signal C1 is obtained.
, C2 can be obtained.

Ｃｘ＝１／２（Ｍｇ＋Ｃｙ）　　１／２（Ｙｅ＋Ｇ）Ｃ
，＝１／２（Ｃｙ＋Ｇ）−１／２（Ｍｇ＋Ｙｅ）以上の
ことは、第２フイールドのｎ行と（ｎ　＋’１　）’行
でも同様に成立する。Cx=1/2(Mg+Cy) 1/2(Ye+G)C
,=1/2(Cy+G)-1/2(Mg+Ye) The above holds true in the n rows and (n+'1)' rows of the second field as well.

また、ｗ度信号ＹＬは各行で得られる信号を３．５８Ｍ
１（ｚのローパスフィルタを通すことにより、次に示す
値を得ることができる。In addition, the w degree signal YL is the signal obtained in each row by 3.58M
1(z), the following values can be obtained.

ＹＬ＝１／２（阿ｇ＋Ｙｅ＋ｃｙ＋Ｇ）従来のカラー固
体カメラでは、前記２つの色差信号Ｃ工、Ｃ２と前記輝
度信号ＹＬにより色感度及び輝度感度の良い画像を得る
ことができた。YL=1/2 (Ag+Ye+cy+G) In the conventional color solid-state camera, an image with good color sensitivity and brightness sensitivity could be obtained using the two color difference signals C, C2 and the luminance signal YL.

（発明が解決しようとする問題点） しかし、第２図に示す従来の色フィルタでは。(Problem to be solved by the invention) However, in the conventional color filter shown in FIG.

１画素を異なる２つの色要素で分割しているため、色フ
ィルタの固体撮像素子への装着精度により次のような間
層が生じる。Since one pixel is divided into two different color elements, the following interlayer occurs depending on the precision with which the color filter is attached to the solid-state image sensor.

例えば、色フィルタが水平方向にずれて装着されると、
１画素における２つの色要素の分割比が変わることにな
り１色差信号量及び輝度信号量が変わり、色再現性、輝
度感度に影響を及ぼす。特に色フィルタが少し回転して
装着されると、さらに色シェーディング等が発生し、画
質を低下させることになる。また、これとは別に色フィ
ルタの構成を、画素を垂直方向に分割するような色配置
に変えても、その場合には垂直方向の色フィルタの位置
ずれにより、同様な問題が発生する。For example, if the color filter is installed horizontally shifted,
As the division ratio of two color elements in one pixel changes, the amount of one color difference signal and the amount of luminance signal change, which affects color reproducibility and luminance sensitivity. In particular, if the color filter is attached with a slight rotation, color shading and the like will occur, which will degrade the image quality. In addition, even if the configuration of the color filters is changed to a color arrangement in which the pixels are vertically divided, a similar problem occurs due to vertical positional deviation of the color filters.

本発明は、色フィルタの位置ずれに対してカラー特性に
影響を与えない色フィルタを提供することである。An object of the present invention is to provide a color filter whose color characteristics are not affected by positional deviation of the color filter.

（問題点を解決するための手段） 上記問題点を解決するために、本発明の色フィルタ各要
素は、固体撮像素子の各画素に対して垂直方向では画素
ピッチの１／２ピツチで、水平方向では画素ピッチと等
しく、第１列の１行目、３行目、５行目及び７行目の色
フィルタ要素が等しく、第１列の２行目、４行目及び第
２列の６行目、８行目の色フィルタ要素が等しく、第１
列の６行目。(Means for Solving the Problems) In order to solve the above problems, each element of the color filter of the present invention is arranged at 1/2 pitch of the pixel pitch in the vertical direction and horizontally with respect to each pixel of the solid-state image sensor. The direction is equal to the pixel pitch, the color filter elements in the 1st row, 3rd row, 5th row, and 7th row of the 1st column are equal, and the 6th row of the 2nd row, 4th row of the 1st column, and the 6th row of the 2nd column are equal. The color filter elements of the 8th and 8th rows are equal, and the first
6th row of column.

８行目及び第２列の２行目、４行目の色フィルタ要素が
等しく、第２列の１行目、３行目、５行目及び７行目の
色フィルタ要素が等しい２列８行の基本配列構成を備え
るものである。The color filter elements in the 2nd and 4th rows of the 8th row and 2nd column are equal, and the color filter elements in the 1st, 3rd, 5th, and 7th rows of the 2nd column are equal.2 columns 8 It has a basic array configuration of rows.

（作　用） 本発明の色フィルタを用いることにより５色フィルタ装
着ずれによるカラー特性変化及び劣化が発生しない。(Function) By using the color filter of the present invention, color characteristic changes and deterioration due to misalignment of the five-color filter do not occur.

（実施例） 本発明の色フィルタの一実施例を第１図により説明する
。第１図は、本発明の色フィルタの一実施例における構
成図である。(Example) An example of the color filter of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of an embodiment of a color filter of the present invention.

同図において、１は色フィルタ、２は固体撮像素子の画
素で、その領域を破線で示す。In the figure, 1 is a color filter, 2 is a pixel of a solid-state image sensor, and their areas are shown by broken lines.

色フィルタ１の各要素は、固体撮像素子の各画素２に対
して垂直方向では画素ピッチの１７２ピツチで水平方向
では画素ピッチに等しく、２列８行の基本配列構成を有
している。Each element of the color filter 1 has a basic array configuration of 2 columns and 8 rows, with a pixel pitch of 172 in the vertical direction and equal to the pixel pitch in the horizontal direction with respect to each pixel 2 of the solid-state image sensor.

第１図に示すように、色フィルタの色要素は、１行、３
行、５行及び７行はシアン（Ｃｙ）と黄（Ｙｓ）、同じ
く２行及び４行はマゼンタ（Ｍｇ）と緑（Ｇ）、また同
じく６行及び８行は緑（Ｇ）とマゼンタ（Ｍｇ）という
ように、それぞれ２色の繰り返しから構成されでいる。As shown in Figure 1, the color elements of the color filter are 1 row, 3
The 5th and 7th rows are cyan (Cy) and yellow (Ys), the 2nd and 4th rows are magenta (Mg) and green (G), and the 6th and 8th rows are green (G) and magenta ( Each color is composed of repeating two colors, such as Mg).

色フィルタ装着時には、第１図に示すように、色フィル
タの各色要素が対応する撮像素子の各画素の中央に位置
するように装着する。このように色フィルタを装着する
ことによって、色フィルタの多少の装着ずれが起きても
、各画素の受ける信号量は変わらない１例えば、第１図
において、色フィルタが垂直方向に少しずれたとする。When the color filter is attached, as shown in FIG. 1, the color filter is attached so that each color element of the color filter is located at the center of each pixel of the corresponding image sensor. By installing the color filters in this way, even if the color filters are slightly misaligned, the amount of signal received by each pixel remains the same.For example, in Figure 1, suppose the color filters are slightly misaligned in the vertical direction. .

しかし、色フィルタの各色要素が対応する撮像素子の各
画素からはみ出さない限り、各画素の受光量は変わらな
い、また１色フィルタが水平方向にずれた場合でも、マ
ゼンタ、緑、シアン及び黄の各色要素が対応する各画素
からはみ出さない限り、各画素の受光量は変わらない、
実際には、水平方向には画素間に垂直信号線があるため
１画素間のセパレート幅を大きく取っている。そのため
、色フィルタの水平方向の位置ずれ許容精度は厳しくな
らない、垂直方向については、原理的に画素間の遮光セ
パレータは必要なく、光の利用率を上げることができる
上１色フィルタの装着許容精度も下げることができる。However, as long as each color element of the color filter does not protrude from each pixel of the corresponding image sensor, the amount of light received by each pixel will not change, and even if one color filter is shifted horizontally, magenta, green, cyan, yellow As long as each color element does not protrude from the corresponding pixel, the amount of light received by each pixel will not change.
Actually, since there are vertical signal lines between pixels in the horizontal direction, the separation width between each pixel is set large. Therefore, the permissible accuracy of positional deviation in the horizontal direction of color filters is not strict, and in the vertical direction, in principle, there is no need for a light-shielding separator between pixels, and the light utilization rate can be increased. can also be lowered.

垂直遮光セパレータがなく、水平セパレータの幅をＷ、
とじて、色フィルタの装着許容精度を計算してみると、
次のようになる。There is no vertical light-shielding separator, and the width of the horizontal separator is W,
Then, when calculating the permissible mounting accuracy of the color filter, we find that
It will look like this:

水平方向の許容精度：Ｗ、／２ 垂直方向の許容精度：　Ｐ　ｖ／４　（Ｐ　ｖ　”垂直
方向の画素ピッチ） 実際の２／３インチ（１，６９ａｎ）サイズのＣＣＤ撮
像素子では、Ｗ、は１０ｐ１１以上で、Ｐｖは１３．５
μｌであるので、色フィルタ装着許容精度は、 水平方向の許容精度：５ｐｍ以上 垂直方向の許容精度：約３．４μｍとなる。Permissible accuracy in the horizontal direction: W, /2 Permissible accuracy in the vertical direction: P v /4 (P v "vertical pixel pitch) In an actual 2/3 inch (1,69 an) size CCD image sensor, W, is 10p11 or higher, Pv is 13.5
μl, the color filter mounting tolerances are as follows: Horizontal tolerance: 5 pm or more Vertical tolerance: approximately 3.4 μm.

一方、現在の色フィルタ装着精度は約ＩＨ程度であるの
で、本発明の色フィルタは、装着時の位置ずれによりカ
ラー特性に全く変化を与えず、また劣化も与えない。On the other hand, since the current color filter mounting accuracy is approximately IH, the color filter of the present invention does not cause any change in color characteristics or deterioration due to positional deviation during mounting.

次にカラー特性自体についても、撮像素子の垂直画素間
に遮光セパレータを設ける必要がないので、素子感度を
上げることができる上、各画素の受ける信号も従来の色
フィルタの場合と同様であり、第１フイールドのｎ行で
は、１／２（Ｍｇ＋Ｃｙ）、１／２（Ｇ　＋Ｙａ）、　
ｎ＋　１行では、１／２（Ｇ　＋Ｃｙ）、１／２（Ｍｇ
＋Ｙｓ）となり、第２フイールドについても同様の結果
となる。しかし、従来よりも素子感度が上がっているの
で、それだけカラー特性も良くなる。Next, regarding the color characteristics themselves, since there is no need to provide a light-shielding separator between the vertical pixels of the image sensor, the element sensitivity can be increased, and the signals received by each pixel are the same as in the case of conventional color filters. In the nth row of the first field, 1/2 (Mg + Cy), 1/2 (G + Ya),
In n+ 1 row, 1/2 (G + Cy), 1/2 (Mg
+Ys), and the same result is obtained for the second field. However, since the element sensitivity is higher than before, the color characteristics are also improved accordingly.

以上のように１本発明の色フィルタは、固体撮像素子へ
の装着において従来の装着精度で色フィルタの位置ずれ
が起きても、カラー特性に影響はなく、良好な特性を得
ることができる。As described above, even if the color filter of the present invention is misaligned with conventional mounting accuracy when mounted on a solid-state image sensor, the color characteristics are not affected and good characteristics can be obtained.

また、本実施例では１色フィルタの色要素構成を第１図
に示すように決めたが、マゼンタ要素の位置とシアン要
素の位置を、また、緑要素の位置と黄要素の位置を入れ
換えそ同様の結果が得られる。In addition, in this example, the color element configuration of the one-color filter was determined as shown in FIG. Similar results are obtained.

（発明の効果） 本発明によれば、固体撮像素子に装着した場合、従来の
装着精度において色フィルタの位置ずれが起きても、カ
ラー特性に影響はなく、良好な特性が得られる。(Effects of the Invention) According to the present invention, when mounted on a solid-state image sensor, even if a color filter is misaligned with conventional mounting accuracy, the color characteristics are not affected and good characteristics can be obtained.

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

第１図は本発明の色フィルタの一実施例における構成図
で、第２図は従来の色フィルタの構成図である。 １　・・・色フィルタ。 １１・・・固体撮像素子の画素。 特許出願人　松下電子工業株式会社 第１図 １　・・・　　先　フィＪし７ ２・・・　■≦］　＜不ａ　＋鱈と１話；５うメロ＼ヲ
１；第２図 １１　・・・　　色　フィｙレタ １２・・・旧体遥傳東５つ島禾FIG. 1 is a block diagram of an embodiment of the color filter of the present invention, and FIG. 2 is a block diagram of a conventional color filter. 1...Color filter. 11... Pixel of solid-state image sensor. Patent applicant: Matsushita Electronics Co., Ltd. Fig. 1 1 ・・・ Destination FiJ 7 2... ■≦] Color Fiyreta 12...Old form Haruden East 5 Islands

Claims (3)

【特許請求の範囲】[Claims] （１）色フィルタ要素が、垂直方向では固体撮像素子の
画素ピッチの１／２のピッチで、水平方向では、前記固
体撮像素子の画素ピッチと等しいピッチで２列８行に配
列されてなる基本構成を有し、第１列の１行目、３行目
、５行目及び７行目の色フィルタ要素が等しく、第１列
の２行目、４行目及び第２列の６行目、８行目の色フィ
ルタ要素が等しく、第１列の６行目、８行目及び第２列
の２行目、４行目の色フィルタ要素が等しく、第２列の
１行目、３行目、５行目および７行目の色フィルタ要素
が等しいことを特徴とする色分離フィルタ。(1) A basic arrangement in which color filter elements are arranged in two columns and eight rows at a pitch that is 1/2 the pixel pitch of the solid-state image sensor in the vertical direction and equal to the pixel pitch of the solid-state image sensor in the horizontal direction. The color filter elements in the first row, the third row, the fifth row, and the seventh row of the first column are equal, and the color filter elements in the second row, the fourth row, and the sixth row of the second column are equal. , the color filter elements in the 8th row are equal, the color filter elements in the 6th and 8th rows of the 1st column and the 2nd and 4th rows of the 2nd column are equal, and the color filter elements in the 1st and 3rd rows of the 2nd column are equal. A color separation filter characterized in that color filter elements in the 5th, 7th and 7th rows are equal. （２）第１列の１行目、３行目、５行目及び７行目の色
フィルタ要素がシアンで、第１列の２行目、４行目及び
第２列の６行目、８行目の色フィルタ要素がマゼンタで
、第１列の６行目、８行目及び第２列の２行目、４行目
の色フィルタ要素が緑で、第２列の１行目、３行目、５
行目及び７行目の色フィルタ要素が黄であることを特徴
とする特許請求の範囲第（１）項記載の色分離フィルタ
。(2) The color filter elements in the 1st row, 3rd row, 5th row, and 7th row of the 1st column are cyan, and the color filter elements in the 2nd row, 4th row, and the 6th row of the 2nd column are cyan; The color filter element in the 8th row is magenta, the color filter elements in the 6th and 8th rows of the 1st column and the 2nd and 4th rows of the 2nd column are green, and the color filter elements in the 1st row of the 2nd column, 3rd line, 5
The color separation filter according to claim 1, wherein the color filter elements in the rows and the seventh row are yellow. （３）第１列の１行目、３行目、５行目及び７行目の色
フィルタ要素がマゼンタで、第１列の２行目、４行目及
び第２列の６行目、８行目の色フィルタ要素がシアンで
、第１列の６行目、８行目及び第２列の２行目、４行目
の色フィルタ要素が黄で、第２列の１行目、３行目、５
行目及び７行目の色フィルタ要素が緑色であることを特
徴とする特許請求の範囲第（１）項記載の色分離フィル
タ。(3) The color filter elements in the first, third, fifth and seventh rows of the first column are magenta, and the color filter elements in the second, fourth and sixth rows of the first column are magenta. The color filter element in the 8th row is cyan, the color filter elements in the 6th and 8th rows of the 1st column and the 2nd and 4th rows of the 2nd column are yellow, and the color filter elements in the 1st row of the 2nd column are yellow. 3rd line, 5
The color separation filter according to claim 1, wherein the color filter elements in the rows and the seventh row are green.
JP61112644A 1986-05-19 1986-05-19 Color separating filter Pending JPS62269588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61112644A JPS62269588A (en) 1986-05-19 1986-05-19 Color separating filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61112644A JPS62269588A (en) 1986-05-19 1986-05-19 Color separating filter

Publications (1)

Publication Number Publication Date
JPS62269588A true JPS62269588A (en) 1987-11-24

Family

ID=14591888

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61112644A Pending JPS62269588A (en) 1986-05-19 1986-05-19 Color separating filter

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Country Link
JP (1) JPS62269588A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63137302U (en) * 1987-02-27 1988-09-09
US4951130A (en) * 1987-04-30 1990-08-21 Kabushiki Kaisha Toshiba Color filter structure of color image sensor
US5150204A (en) * 1988-04-27 1992-09-22 Canon Kabushiki Kaisha Solid state image pickup having plural pixels arranged on plural lines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63137302U (en) * 1987-02-27 1988-09-09
US4951130A (en) * 1987-04-30 1990-08-21 Kabushiki Kaisha Toshiba Color filter structure of color image sensor
US5028547A (en) * 1987-04-30 1991-07-02 Kabushiki Kaisha Toshiba Manufacture of a color image sensor
US5150204A (en) * 1988-04-27 1992-09-22 Canon Kabushiki Kaisha Solid state image pickup having plural pixels arranged on plural lines

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