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Solid state imaging device

A technology of solid-state imaging and equipment, which is applied in image communication, electric solid-state devices, television, etc., and can solve problems such as image quality degradation

Active Publication Date: 2005-05-18
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, when the primary color Bayer filter is placed in the above-mentioned solid-state imaging device including pixels of different structures, the image quality sometimes deteriorates, for example, variations in luminance (streaks) can be found between lines (pixel lines)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0035] Figures 1A to 1C is a plan view showing a pixel pattern of an imaging pixel region in a solid-state imaging device having a primary color Bayer filter according to a first embodiment of the present invention.

[0036] refer to Figures 1A to 1C A plurality of pixels 110A and 110B are arranged in a matrix of rows and columns of the solid-state image sensor of the first embodiment in a manner similar to that of the known solid-state imaging device shown in FIG. 6 . The primary color Bayer filter 120 is arranged corresponding to each basic unit 112 provided in a rectangular area formed by 2×2 pixels. In the figure, the basic unit 112 and the color filter 120 are surrounded by a frame indicated by a dotted line.

[0037] Unlike the pixel pattern shown in FIG. 6, in the first embodiment, pixel columns are alternately changed by one pixel in the vertical direction (column direction). Therefore, if Figure 1C As shown, pixels with an A-shaped structure (second pixel) 110A...

no. 2 example

[0041] Figure 2APlan views to 2C show pixel patterns of imaging pixel regions in a solid-state imaging device having primary color Bayer filters according to a second embodiment of the present invention.

[0042] refer to Figure 2A to 2C, multiple pixels 210A and 210B are similar to Figures 1A to 1C The way shown in the first embodiment is arranged in the row-column matrix of the solid-state image sensor in the second embodiment. The primary color Bayer filter 220 is arranged corresponding to each basic unit 212 provided in a rectangular area formed by 2×2 pixels. In the figure, the basic unit 212 and the color filter 220 are surrounded by a frame indicated by a dotted line.

[0043] Different from the pixel pattern shown in FIG. 6 , in the second embodiment, pixel rows are alternately transformed by one pixel in the horizontal direction (row direction). Therefore, as shown in FIG. 2C , pixels having an A structure (second pixels) 210A and pixels having a B structure (f...

no. 3 example

[0047] 3A to 3D are plan views showing pixel patterns of imaging pixel regions in a solid-state imaging device having primary color Bayer filters according to a third embodiment of the present invention.

[0048] Referring to FIGS. 3A to 3D , in the solid-state imaging device of the third embodiment, a row of pixels (second pixels) 310A having an A structure and a row of pixels (first pixels) 310B having a B structure are formed similarly to those shown in FIG. 6 . The manner in the known solid-state imaging device shown is alternately arranged. However, the structure of the basic unit and the color filter is different from that shown in FIG. 6 .

[0049] In the third embodiment, the red component filter and the blue component filter are adjacent at the center of each basic unit 312, and two cells having an A structure and adjacent in the horizontal direction (row direction) pixels (second pixels) 310A. Two green component filters are arranged on two pixels (first pixels) 31...

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Abstract

In a solid-state imaging device, primary color Bayer filters are provided on imaging pixel regions defined by pixels having different structures. Color component filters for the same color among the color filters are arranged corresponding to pixels having the same structure. More specifically, pixels are arranged based on the arrangement of color component filters of color filters, or color component filters are arranged based on the arrangement of pixels.

Description

technical field [0001] The present invention relates to a solid-state imaging device, such as a CCD image sensor or a CMOS image sensor, comprising an imaging pixel area defined by two-dimensionally arranged pixels and a color filter. Background technique [0002] In general, solid-state imaging devices, such as CCD image sensors and CMOS image sensors, are often mounted as miniature cameras in digital cameras and cellular phones. A solid-state imaging device includes an imaging pixel region in which a plurality of pixels are two-dimensionally arranged in rows and columns, each pixel having a photoelectric conversion region such as a photodiode. The pixels convert imaging light into signal charges, and convert the signal charges into electrical signals to obtain image signals corresponding to two-dimensional images. [0003] In a CCD image sensor, signal charges obtained by photodiodes in pixels are transferred to an output unit through a CCD transfer register, and are outp...

Claims

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Application Information

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IPC IPC(8): H01L27/14G02B6/00H01L27/146H04N5/335H04N5/369H04N5/372H04N5/374H04N9/04H04N9/07
CPCH01L27/14603H01L27/14621H04N25/134H01L27/14H04N25/00H04N23/12
Inventor 田谷圭司
Owner SONY CORP