JPH09238356A - Solid-state image pickup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the accuracy of a luminance signal and color difference signals and the performance of the device in the case of improving the resolution without changing a degree of circuit integration by varying an angle of parallel flat plates and detecting sequentially sample points of a light receiving section and forming plural image signals from detected outputs of the sample points. SOLUTION: A light is made incident to an image pickup board 1 having a light receiving section 2 where lots of light receiving pixels are arranged via a position displacement device 4 revising a projection position of sample points and a lens 3. The position displacement device 4 is made up of a support plate 7 to which a circular hole 7a is made, a transparent parallel disks 5 provided between the support plate 7 and a hold ring 6 and a piezoelectric element 8 tilted to an optical axis 3-dimensionally. Then the piezoelectric element 8 is electrically expanded and contracted to vary an angle of the parallel flat disk 5, any light receiving pixel of the light receiving section 2 is used to sequentially detect four sample points SA-SD and outputs of plural sample points are synchronized to form plural image signals. Thus, in the case of improving the resolution without changing a degree of circuit integration, the accuracy of the luminance and color difference signals is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-state image pickup device.

[0002]

2. Description of the Related Art Conventionally, a solid-state image pickup device detects an image of a photographic symmetrical object, that is, an image to be photographed as a large number of sample points by a light receiving portion in which light receiving pixels such as CCDs are arranged vertically and horizontally, and the detected sample points The output is formed as an image signal, and the resolution when the image is captured is determined by the number of light receiving pixels. Therefore, in order to improve the resolution, it is conceivable to increase the degree of integration to increase the number of pixels. However, in the solid-state imaging device, the light receiving section must have the photosensitive section and the charge transfer section. As a result, the area of each light receiving pixel becomes small, and the sensitivity is lowered.

As a method of solving this, a plurality of sample points of an image to be photographed are sequentially moved mechanically or optically without changing the degree of integration and detected by any one of the light-receiving pixels of the light-receiving section. It has been proposed to synchronize the detected outputs of a plurality of sample points with the moving positions of these sample points to form a plurality of image signals. In this case, as a mechanical means for moving the sample point, there is a structure for moving the light receiving part in the horizontal and vertical directions, and as an optical means, the tilt angle and tilt direction of the refraction element for refracting light are used. There is a structure in which the sample point of the image is moved on the light receiving portion by variably controlling the thickness of the refraction element and the refraction element.

In this way, a plurality of sample points are moved and one light-receiving pixel is sequentially detected, and an image signal formed by the detected output is subjected to interpolation processing (apparently the pixel data of the sequentially detected image signal is apparently The final pixel array data is obtained by arranging between the light receiving pixels. FIGS. 6A to 6E are diagrams showing an example of interpolation processing for obtaining the final pixel array data. In this case, as shown in FIG. 6A, the array of the light receiving pixels of the light receiving section is an array in which three light receiving pixels arranged side by side in ABC form one set, and the light receiving pixels are arranged in the horizontal direction and the column direction. A gap corresponding to one light receiving pixel is provided between each of them. Then, four sample points of the image photographed by the respective light receiving pixels arranged in this way are sequentially detected and the interpolation processing is performed. In addition, here, for convenience of description, it is assumed that the light-receiving pixel apparently moves.

First, as shown in FIG. 6B, each light receiving pixel is moved to the right by 0.5 pixel pitch, whereby the A pixel is moved between the A pixel and the B pixel in the initial array before the B pixel is moved. Are arranged between the B pixel and the C pixel in the initial array, and the C pixel is arranged between the C pixel and the A pixel (not shown) in the initial array. Thereafter, as shown in FIG. 6C, each light receiving pixel is moved downward by 0.5.
The pixel pitch is moved so that the A pixel is arranged between the upper and lower A pixels arranged by the previous movement, the B pixel is arranged between the upper and lower B pixels arranged by the previous movement, and the C pixel is arranged by the previous movement. They are respectively arranged between the upper and lower C pixels. further,
As shown in FIG. 6 (d), each light-receiving pixel is moved to the left by 0.5 pixel pitch, whereby the A pixel is located between the upper and lower A pixels of the initial array and the B pixel is located between the upper and lower B pixels of the initial array. Meanwhile, C
Pixels are arranged between C pixels above and below the initial arrangement.

The final pixel array data thus obtained is an array in which the same pixels are adjacent to each other, as shown in FIG. 6 (e). That is, among the pixels of ABC, four A pixels are adjacent to each other and four B pixels are adjacent to each other and are arranged on the right side of the A pixel, and four C pixels are arranged.
The pixels are arranged adjacent to each other on the right side of the B pixel. By processing the final pixel array data arrayed in this way, the luminance signal Y and the two types of color difference signals R-
Y, BY are obtained, and these signals Y, RY, BY are obtained.
The image taken by is reproduced with the pixel array of the final pixel array data shown in FIG. 6D, and the resolution can be improved without changing the integration degree of the light receiving pixels.

[0007]

However, in such a solid-state image pickup device, the final pixel array data is shown in FIG.
As shown in (e), the same pixels are arranged in a pixel array adjacent to each other, so that the same pixels are locally concentrated, so that the resolution of the luminance signal Y cannot be sufficiently increased. There is a problem. In addition, AB of the light receiving unit
C Since the array is composed of three light receiving pixels, one set of color difference signals R-Y and B-Y can be obtained by processing the data of the three light receiving pixels, but three types of interpolated Since the pixels of 3 are densely packed for each type, the 3 types of pixels are dispersed at wide intervals, which reduces the data accuracy of the color difference signals RY and BY, which is sufficient for a solid-state imaging device. There is also a problem that it is not possible to obtain high performance.

An object of the present invention is to improve the precision of the luminance signal and the color difference signal and the performance of the solid-state image pickup device when improving the resolution without changing the degree of integration.

[0009]

According to the first aspect of the present invention,
When detecting a large number of sample points of an image to be photographed by a light receiving section in which light receiving pixels are arranged, a plurality of sample points of the image are moved by position displacement means and sequentially detected by one light receiving pixel of the light receiving section. In the solid-state imaging device that forms the plurality of image signals by synchronizing the output of the plurality of sample points with the movement position by the position displacement means, the final pixel array data obtained by interpolating the plurality of image signals is the plurality of light receiving units. When one set of pixels is provided, the combination array of the one set of light-receiving pixels is a pixel array having at least a horizontal array period.

Therefore, according to the first aspect of the present invention, a plurality of sample points of the image are sequentially detected by one light receiving pixel of the light receiving section to form a plurality of image signals, so that the degree of integration is not changed. When the resolution is improved, the final pixel array data obtained by interpolating a plurality of image signals is a pixel array having at least a horizontal array period with a combination of one set of light receiving pixels. Therefore, in the horizontal array of the final pixel array data, Since the same pixels are not adjacent to each other, and therefore, the same pixels are not locally concentrated as in the conventional case, the resolution of the luminance signal can be sufficiently increased, and a plurality of types of interpolation processed Since the pixels are closer than the conventional one, it is possible to improve the data accuracy of the color difference signal, and this makes it possible to obtain sufficient performance as a solid-state imaging device. . In this case, as described in claim 2, in the final pixel array data, when three light-receiving pixels arranged side by side in the light-receiving unit are set as one set, the one light-receiving pixel is apparently moved by 1.5 pixel pitch to the right. However, it is desirable that the pixel arrangement is such that the pixel array is moved downward by 0.5 pixel pitch and further moved to the left by 1.5 pixel pitch.

According to the third aspect of the present invention, the final pixel array data is interpolated so that one set of light-receiving pixels is apparently sequentially moved in an oblique direction. Since the pixel arrays are arranged in the respective column directions, the same pixels are not adjacent to each other in both the lateral direction and the column direction of the final pixel array data. Therefore, the invention according to claim 1 The accuracy of the luminance signal and the color difference signal is better than that of the above, and the performance as a solid-state imaging device can be further enhanced.
In this case, when the final pixel array data is a set of four light-receiving pixels arranged in the lateral direction and two in the column direction of the light-receiving portion, the one set of light-receiving pixels is defined as follows. Apparently 1 pixel pitch to the right and 0.5 above
Move in the pixel pitch composition direction, move to the right by 0.5 pixel pitch and downward in the 1 pixel pitch composition direction, and further to the left in 1 pixel pitch and downward in the 0.5 pixel pitch composition direction It is desirable that the pixel array is formed by

According to a fifth aspect of the present invention, the final pixel array data is a combination array of the one set of light receiving pixels by an interpolation process in which one set of light receiving pixels is apparently moved, with a side by side arrangement period and its side by side arrangement. The period is 0 for odd and even columns.
Since the pixel arrangement is shifted by 5 pixel pitches, the same pixels are not adjacent to each other in the horizontal arrangement of the final pixel arrangement data, and the horizontal arrangement period is 0.
The same pixel does not completely correspond to and adjacent to each other even in the arrangement in the column direction due to the deviation of 5 pixel pitch. Therefore, the accuracy of the luminance signal and the color difference signal is the same as in the invention according to claim 3. The performance of the solid-state imaging device can be improved. In this case, as described in claim 6, when the final pixel array data is a set of three light receiving pixels arranged side by side in the light receiving unit, the one light receiving pixel is apparently moved by 1.5 pixel pitch to the right. Then, move to the combining direction of 0.75 pixel pitch to the right and 0.5 pixel pitch downward,
Further, it is desirable that the pixel array is moved to the left by 1.5 pixel pitch.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a solid-state image pickup device of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram of a solid-state imaging device. In this figure, reference numeral 1 denotes an image pickup substrate, and a light receiving portion 2 is provided on a light incident surface of the image pickup substrate 1. The light receiving section 2 has a structure in which a large number of light receiving pixels, which will be described later, are formed in a matrix. A lens 3 is arranged in front of the light receiving unit 2 (light incident side), and a projection position of a sample point of an image (not shown) to be photographed is displaced in front of the lens 3 (light incident side). A position displacement mechanism (position displacement means) 4 is arranged. The position displacement mechanism 4 has a circular transparent plane-parallel plate 5, a holding ring 6 attached to the outer periphery of the plane-parallel plate 5, and a circular hole 7a at a position corresponding to the plane-parallel plate 5. The piezo element 8 includes a support plate 7 and a piezo element (displacement element) 8 provided between the support plate 7 and the holding ring 6 for inclining the plane-parallel plate 5 three-dimensionally with respect to the optical axis O.
Is electrically controlled to expand and contract, and the tilt angle and tilt direction of the plane-parallel plate 5 with respect to the optical axis O can be varied.

Therefore, in this solid-state image pickup device, when the image of the object to be photographed is taken, the light from each sample point of the image is shifted according to the tilt angle and the tilt direction with respect to the optical axis O of the plane-parallel plate 5, The light of each shifted sample point is made incident on each light receiving pixel of the light receiving unit 2 through the lens 3, and the expansion and contraction deformation of the piezo element 8 is electrically controlled to tilt the parallel plane plate 5 with respect to the optical axis O. By varying the tilt direction, the plurality of adjacent sample points are sequentially detected by any one of the light receiving pixels of the light receiving unit 2, and the outputs of the detected plurality of sample points are synchronized with the moving positions of these sample points. To form a plurality of image signals. That is, as shown in FIG. 2, the projection positions of the four sample points S _A , S _B , S _C , and S _D of the image to be captured are changed depending on the tilt angle and the tilt direction of the plane parallel plate 5 with respect to the optical axis O. And sequentially move it on the light receiving section 2, and sequentially detect four sample points S _A , S _B , S _C , and S _D by any one light receiving pixel (the hatched portion in the figure) of this light receiving section 2. .

Thus, a plurality of sample points S _A , S _B , S
_The final pixel array data is obtained by moving _C and S _D and sequentially detecting them by one light receiving pixel, and interpolating the image signal formed by the detected output. Interpolation processing for obtaining the final pixel array data is shown in FIGS. In this case, the arrangement of the light receiving pixels of the light receiving unit 2 is as shown in FIG.
As shown in (a), it is arranged so that three light receiving pixels arranged side by side in ABC form one set, and a gap corresponding to one light receiving pixel is provided between each of the light receiving pixels in the horizontal direction and the column direction. Has been. In addition, the aperture ratio Q of each light receiving pixel of the light receiving unit 2
Is set to Q = (1 / N) × 100% = 25% when the apparent number of movements of the light receiving pixels is N (4 times). The four sample points S _A , S _B , S _C , and S _D of the image are sequentially detected by the respective light receiving pixels arranged in this way, and the detected image signal is interpolated. Here, also for convenience of explanation, it is assumed that the light-receiving pixel apparently moves.

First, as shown in FIG. 3B, each light receiving pixel is moved to the right by 1.5 pixel pitches, whereby the A pixel is moved between the B pixel and the C pixel in the initial array before the B pixel is moved. Between the C pixel and the A pixel in the initial array, and the C pixel on the right side of the A pixel on the right side of the initial array. After this, FIG.
As shown in (c), each light-receiving pixel is moved downward by 0.5 pixel pitch, so that the A pixel is arranged between the upper and lower A pixels arranged by the previous movement, and the B pixel is arranged by the previous movement. C pixels are arranged between the upper and lower B pixels and between the upper and lower C pixels arranged by the previous movement. Further, FIG.
As shown in (d), each light-receiving pixel is moved to the left by 1.5 pixel pitches, whereby A pixel is located between the upper and lower A pixels of the initial array, B pixel is located between the upper and lower B pixels of the initial array, and C. Pixels are arranged between C pixels above and below the initial arrangement.

In the final pixel array data interpolated in this way, as shown in FIG. 3 (e), the same pixels are not adjacent to each other in the side-by-side array, and the ABC pixel array is the combined array. Along with a certain ACB pixel array, each pixel also has an array of 0.5 pixel pitch.
By processing the final pixel array data arrayed in this way, the luminance signal Y and the two types of color difference signals RY,
BY is obtained, and the image photographed by these signals Y, RY, and BY is reproduced with the pixel array of the final pixel array data shown in FIG. 3D.

As described above, in this solid-state image pickup device, the four sample points S _A , S _B , S _C , and S _D of the image to be photographed are sequentially detected by one light-receiving pixel of the light-receiving section 2 to obtain a plurality of image signals. When the resolution is improved without changing the degree of integration, the final pixel array data obtained by interpolating the four image signals is set to one of the three light receiving pixels ABC arranged side by side in the light receiving unit 2.
A set of light receiving pixels is apparently moved by 1.5 pixel pitch to the right, moved by 0.5 pixel pitch downward, and further moved by 1.5 pixel pitch to the left. As shown in FIG. 3E, the same pixel is not adjacent to each other in the side-by-side array, and the pixel array of ABC is the pixel array of ACB which is the combination array, and each pixel has a pitch of 0.5 pixel. Since the same pixels are not locally concentrated as in the conventional arrangement, the resolution of the luminance signal Y can be improved, and the pixels of the interpolated ACB are closer than in the conventional arrangement. Therefore, it is possible to improve the data accuracy of the two types of color difference signals R-Y and B-Y, and it is possible to obtain sufficient performance as a solid-state imaging device.

Next, with reference to FIGS. 4A to 4E, a second embodiment of the solid-state image pickup device of the present invention will be described. The same parts as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and description thereof will be omitted. This solid-state imaging device has the same configuration except that the set of light-receiving pixels of the light-receiving unit 2 and the interpolation process in the first embodiment are different. That is, the arrangement of the light receiving pixels of the light receiving unit 2 is as shown in FIG.
As shown in (a), four light-receiving pixels of ABCD are set as one set, AB is arranged side by side, and CD is arranged under the array, and the light-receiving pixels are arranged in the horizontal and column directions. Is provided with a gap corresponding to one light receiving pixel. Further, the aperture ratio Q of each light receiving pixel of the light receiving unit 2 is set to 25% (= (1 / N) × 100%) as in the first embodiment. The final pixel array data is obtained by performing an interpolation process in which the pixel data detected by the respective light-receiving pixels arrayed in this way are sequentially moved in the diagonal direction of the keima jump. Here, also for convenience of explanation, it is assumed that the light-receiving pixel apparently moves.

In the interpolation process for obtaining the final pixel array data, as shown in FIG. 4 (b), first, as shown in FIG. 4B, the light-receiving pixels are combined in the direction of 1.5 pixel pitch to the right and 0.5 pixel pitch upward. To move the A pixel above the B pixel in the initial array before moving, the B pixel above the A pixel in the initial array, the C pixel between the B pixel and the D pixel on the right side of the initial array, and the D pixel between The pixels are arranged between the A pixel and the C pixel in the initial arrangement. After this,
As shown in FIG. 4C, each light-receiving pixel is moved to the right in the combining direction of 0.5 pixel pitch and 1 pixel pitch downward,
As a result, the A pixel is replaced with the C pixel and the D arrayed by the previous movement.
Between pixels, the B pixel is replaced with the D pixel and the C arrayed by the previous movement.
Between pixels, C pixel is the A pixel and B pixel arrayed by the previous movement
Between pixels, the D pixel is the B pixel and the A arrayed by the previous movement.
They are arranged between pixels. Further, as shown in FIG. 4D, each light-receiving pixel is moved to the left in the combining direction of one pixel pitch and downward by 0.5 pixel pitch.
Pixels are between C pixels and D pixels in the initial array, B pixels are between D pixels and C pixels in the initial array, C pixels are between A pixels and B pixels in the initial array, and D pixels are B pixels in the initial array. They are arranged between A pixels respectively.

In the final pixel array data interpolated in this way, the same pixels may be adjacent to each other in both the horizontal array and the column array, as shown in FIG. 4 (e). Instead, the pixel array of ABCD becomes the array of the combination. That is, the array in the horizontal direction is the pixel array of BDAC, ACBD, DBCA, and CADB in order from the top, and the array in the column direction is BAD in order from the left.
The pixel arrays are C, DCBA, ABCD, and CDAB. Further, in such a pixel arrangement, each pixel is closely arranged with a 0.5 pixel pitch. By processing the final pixel array data arrayed in this way, as in the first embodiment, the luminance signal Y and the two types of color difference signals RY, B-.
Y is obtained, and an image photographed by these signals Y, RY, and BY is reproduced with the pixel array of the final pixel array data shown in FIG. 4 (d).

In such a solid-state image pickup device, in addition to the same effects as the first embodiment, the final pixel array data obtained by interpolating a plurality of image signals is obtained by setting the four light-receiving pixels of the ABCD of the light-receiving unit 2 to one. Apparently, one set of light-receiving pixels is apparently moved to the combining direction of 1 pixel pitch to the right and 0.5 pixel pitch to the right, and 1 pixel pitch to the right and 1 pixel downward.
Since the pixel array is formed by moving in the pixel pitch combination direction and further moving to the left by 1 pixel pitch and downward in the 0.5 pixel pitch combination direction, either in the horizontal direction arrangement or the column direction arrangement. Also, the same pixels are not adjacent to each other, and the pixel array of ABCD is a combination array thereof as shown in FIG. 4E. For example, in the lateral direction, BDAC, ACBD, DBCA, It becomes each pixel array of CADB, and the array in the column direction is BAD in order from the left.
Each pixel array of C, DCBA, ABCD, and CDAB is arranged, and each pixel is closely arranged at a 0.5 pixel pitch. Therefore, unlike the conventional case, the same pixels are not locally concentrated and the same pixels are not adjacent to each other even in the arrangement in the column direction. The Y resolution can be increased, and the data accuracy of the two types of color difference signals R-Y and B-Y can be further improved, whereby sufficient performance as a solid-state imaging device can be ensured. .

Next, a third embodiment of the solid-state image pickup device of the present invention will be described with reference to FIGS. Also in this case, the same parts as those in the first embodiment shown in FIGS. 1 to 3 are designated by the same reference numerals, and the description thereof will be omitted. This solid-state imaging device has the same configuration except that the final pixel array data in the first embodiment is different.
In this case, as in the first embodiment, the light receiving pixels of the light receiving unit 2 are arranged side by side with three light receiving pixels of ABC as one set, and the aperture ratio Q of each light receiving pixel of the light receiving unit 2 is set.
Is 25% (= (1 / N) × 10 as in the first embodiment.
It is set to 0%). Four sample points S _A , S _{B of} the image captured by the respective light receiving pixels arranged in this way,
The final pixel array data is obtained by sequentially detecting S _C and S _D and interpolating the four types of detected image signals. Here, also for convenience of explanation, it is assumed that the light-receiving pixel apparently moves.

In the interpolation process for obtaining the final pixel array data, first, as shown in FIG. 5A, each light receiving pixel is moved to the right by 1.5 pixel pitches, whereby the A pixel is set to the initial state before the movement. The B pixel is arranged between the B pixel and the C pixel of the array, the B pixel is arranged between the C pixel of the initial array and the A pixel on the right side, and the C pixel is arranged on the right side of the A pixel on the right side of the initial array. After that, as shown in FIG. 5B, each light-receiving pixel is moved to the right in the combining direction of 0.75 pixel pitch and 0.5 pixel pitch downward, whereby the A pixel is positioned above and below the initial array. While straddling both the C pixel and the upper and lower B pixels arranged by the previous movement, the B pixel is the upper and lower A pixels of the initial arrangement and the upper and lower C pixels arranged by the previous movement.
While straddling both of the pixels, the C pixels are arranged in a state of being half-overlapped between the upper and lower A pixels arranged in the previous movement. Further, as shown in FIG. 5C, each light receiving pixel is moved to the left by 1.5 pixel pitches, whereby the A pixel is half-overlapped between the upper and lower B pixels of the initial array, and the B pixel is moved two times before. While straddling both the upper and lower A pixels arranged by the movement of C and the upper and lower C pixels of the initial arrangement, the C pixel becomes both the upper and lower B pixels arranged by the movement two times before and the upper and lower A pixels of the initial arrangement. Arrange each while straddling.

In the final pixel array data interpolated in this way, the same pixels may be adjacent to each other in both the horizontal array and the column array, as shown in FIG. 5D. Not only is the arrangement of combinations of ABC pixel arrangements, but the pixel arrangement of odd-numbered columns and the pixel arrangement of even-numbered columns are shifted by 0.5 pixel pitch, and the upper and lower three pixels are all in a triangular shape with a combination of ABC pixels. Will be adjacent to each other. That is, in the horizontal array, the odd-numbered columns are ACB pixel arrays, the even-numbered columns are BAC pixel arrays, and the three pixel arrays in which the odd-numbered columns and the even-numbered columns vertically correspond to the combination of ABC. Becomes an array of. By processing the final pixel array data arrayed in this way, a luminance signal Y and two types of color difference signals RY and BY are obtained as in the first embodiment, and these signals Y and R- are obtained. The images taken by Y and BY are shown in FIG.
It is reproduced with the pixel array of the final pixel array data shown in (d).

In such a solid-state image pickup device, the same effect as the first embodiment can be obtained, and the final pixel array data obtained by interpolating the four image signals is the ABC 3 of the light receiving section 2.
One light-receiving pixel is set as one set, and one set of light-receiving pixels is apparently moved to the right by 1.5 pixel pitch, and moved to the right at 0.75 pixel pitch and downward in the combination direction of 0.5 pixel pitch. ,
Further, since the pixel array is moved to the left by 1.5 pixel pitch, the same pixel is not adjacent to each other in both the horizontal array and the column array, and the pixel array of the odd column And the pixel array in the even-numbered column is shifted by 0.5 pixel pitch, and the upper and lower three pixels are all adjacent to each other in a triangular shape by a combination of different ABC pixels. In addition to not being densely packed, the same pixels are not adjacent to each other even in the arrangement in the column direction, and the upper and lower three pixels are all adjacent to each other in a triangular shape by a combination of different ABC pixels. The resolution of the luminance signal Y can be increased and the data accuracy of the two types of color difference signals R-Y and B-Y can be further improved as compared with the first embodiment. It is possible to secure a sufficient performance as a device.

The solid-state image pickup device of the present invention can be widely applied to photographing equipment such as an electronic still camera for photographing a still image or a video camera or a surveillance camera for photographing a moving image.

[0028]

As described above, according to the first aspect of the present invention, a plurality of sample points of an image to be photographed are moved and sequentially detected by one light receiving pixel of the light receiving section, and the detected plurality of detected pixels are detected. When the output of the sample point is synchronized with the moving position and formed as a plurality of image signals, when the resolution is improved without changing the integration degree, the final pixel array data obtained by interpolating the plurality of image signals is the light receiving unit. When a plurality of light receiving pixels of is set as one set, the combination array of the one set of light receiving pixels is a pixel array having at least a horizontal arrangement period,
Since the same pixels are not adjacent to each other in the side-by-side arrangement of the final pixel arrangement data, and therefore the same pixels are not locally concentrated as in the conventional case, the resolution of the luminance signal can be sufficiently increased. At the same time, the interpolated multiple types of pixels will be closer than before, so
It is possible to improve the data accuracy of the color difference signals, and thereby obtain sufficient performance as a solid-state imaging device.

According to the third aspect of the invention, the final pixel array data is interpolated in such a manner that one set of light-receiving pixels is apparently sequentially moved in an oblique direction. Since the pixel arrays are arranged in the horizontal direction and the column direction, the same pixels are not adjacent to each other in any of the horizontal direction and the column direction of the final pixel array data. Therefore, the invention according to claim 1. The accuracy of the luminance signal and the color difference signal is better than that of the above, and the performance as a solid-state imaging device can be further enhanced. According to the invention described in claim 5, the final pixel array data is a combination array of the one set of light receiving pixels by an interpolation process of apparently moving one set of light receiving pixels, in a horizontal arrangement cycle,
In addition, since the pixel arrangement in which the horizontal arrangement period is shifted by 0.5 pixel pitch between the odd-numbered column and the even-numbered column, the same pixel is not adjacent to each other in the horizontal arrangement of the final pixel arrangement data, and the horizontal arrangement period is an odd-numbered column. And the even-numbered columns are shifted by 0.5 pixel pitch, even in the arrangement in the column direction,
Since the same pixel does not completely correspond to each other and are adjacent to each other, the accuracy of the luminance signal and the color difference signal is good, and the performance of the solid-state imaging device can be improved, as in the third aspect of the invention.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a solid-state imaging device according to the present invention.

FIG. 2 is a diagram showing a correspondence relationship of four sample points with respect to one light receiving pixel in the light receiving section of FIG.

3A and 3B show a process of creating final pixel array data according to the first embodiment of the present invention, FIG. 3A is a diagram showing an array state of three ABC light receiving pixels in a light receiving portion, and FIG. FIG. 6 is a diagram showing a pixel arrangement state when the pixel pixel is moved by 1.5 pixel pitch, FIG. 7C is a diagram showing a pixel arrangement state when each pixel is further moved downward by 0.5 pixel pitch, FIG. 7D is a diagram showing a pixel arrangement state when each pixel is further moved to the left by 1.5 pixel pitch, and FIG. 8E is a diagram showing a basic pixel arrangement state of final pixel arrangement data.

FIG. 4 shows a process of creating final pixel array data according to the second embodiment of the present invention, FIG. 4A is a diagram showing an array state of four ABCD light receiving pixels in a light receiving section, and FIG. FIG. 3C is a diagram showing an arrangement state of pixels when the pixel is moved in a combination direction of 1 pixel pitch and 0.5 pixel pitch upward, FIG.
Is a diagram showing an arrangement state of pixels when the pixels are further moved to the right by 0.5 pixel pitch and downward in the combining direction of 1 pixel pitch, and (d) further shows that each pixel is moved to the left by 1 pixel pitch. And (e) is a diagram showing a basic pixel arrangement state of the final pixel arrangement data when the pixel is moved downward in the combining direction of 0.5 pixel pitch.

FIG. 5 is a diagram showing a process of creating final pixel array data according to the third embodiment of the present invention, FIG. 5A is a diagram showing an array state of pixels when each pixel is moved to the right by 1.5 pixel pitch;
(B) is a diagram showing an arrangement state of pixels when the pixels are further moved to the right in a combination direction of 0.75 pixel pitch and 0.5 pixel pitch downward, and (c) further shows each pixel. The figure which shows the pixel arrangement state when it is moved to the left by 1.5 pixel pitch, and (d) is the figure which shows the basic pixel arrangement state of the final pixel arrangement data.

FIG. 6 shows a conventional process of creating final pixel array data,
(A) is a diagram showing an array state of three ABC light-receiving pixels in a light receiving section, (b) is a diagram showing an array state of pixels when each pixel is moved to the right by 0.5 pixel pitch, (c) 8D is a diagram showing an arrangement state of pixels when each pixel is further moved downward by 0.5 pixel pitch, and FIG. 8D is an arrangement of pixels when each pixel is further moved to the left by 0.5 pixel pitch. The figure which showed the state, (e) is the figure which showed the basic pixel arrangement | positioning state of final pixel arrangement | sequence data.

[Explanation of symbols]

2 Light receiving part 4 Position displacement mechanism A, B, C, D Light receiving pixel S _A , S _B , S _C , S _D Sample point

Claims (8)

[Claims] 1. When detecting a large number of sample points of an image captured by a light receiving section in which light receiving pixels are arranged, a plurality of sample points of the image are moved by a position displacing means to obtain one light receiving pixel of the light receiving section. In the solid-state imaging device that sequentially detects the output of the plurality of detected sample points and forms a plurality of image signals in synchronization with the movement position by the position displacement means, the final pixel obtained by interpolating the plurality of image signals. A solid-state imaging device, wherein the array data is a pixel array having at least a side-by-side cycle in a combined array of the one set of light-receiving pixels when a plurality of light-receiving pixels of the light-receiving unit is set as one set. 2. The final pixel array data is such that, when three light receiving pixels arranged side by side in the light receiving unit are set as one set, the one set of light receiving pixels is apparently moved to the right by 1.5 pixel pitch and is moved downward. 2. A pixel array which is moved by 0.5 pixel pitch and further moved by 1.5 pixel pitch to the left.
The solid-state imaging device according to claim 1. 3. The final pixel array data is a combination array of the one set of light-receiving pixels in each of a horizontal direction and a column direction by an interpolation process for apparently sequentially moving the one set of light-receiving pixels in an oblique direction. The solid-state imaging device according to claim 1, wherein the solid-state imaging device has a pixel array arranged in line. 4. The final pixel array data has a set of four light-receiving pixels arranged in the lateral direction and two in the column direction of the light-receiving unit as one set, and the one set of light-receiving pixels is apparently right. 1 pixel pitch upward and 0.5 pixel pitch upward in the combining direction, 0.5 pixel pitch rightward and 1 pixel pitch downward in the combining direction, and 1 pixel pitch downward and downward. 4. The solid-state imaging device according to claim 3, wherein the solid-state imaging device has a pixel array formed by moving in a combination direction of 0.5 pixel pitch. 5. The final pixel array data is a combination array of the one set of light receiving pixels in a side-by-side cycle by an interpolation process of apparently moving the one set of light receiving pixels in sequence.
2. The solid-state image pickup device according to claim 1, wherein the horizontal array period is a pixel array in which odd-numbered columns and even-numbered columns are shifted by 0.5 pixel pitch. 6. The final pixel array data is such that, when three light-receiving pixels arranged side by side in the light-receiving section are set as one set, the one set of light-receiving pixels is apparently moved to the right by 1.5 pixel pitch and to the right. 6. The solid-state imaging device according to claim 5, wherein the pixel array has a pixel pitch of 0.75 pixel pitch and is moved downward in a combining direction of 0.5 pixel pitch, and further moved to the left by 1.5 pixel pitch. . 7. The position displacing means has a transparent plane-parallel plate disposed on the optical axis between the image and the light-receiving unit, and tilts the plane-parallel plate three-dimensionally with respect to the optical axis. The solid-state imaging device according to claim 1, comprising a displacement element. 8. The aperture ratio Q of the light receiving pixels is set to Q = (1 / N) × 100%, where N is the apparent number of movements of the light receiving pixels. Item 7. The solid-state imaging device according to any one of items 1 to 7.