Color imaging sensor, color filter array, and color imaging device

Abstract

It is an object of the present invention to provide a single board type color image sensor which can suppress the reduction of detection luminance range while enlarging detection color range. The color image sensor of the present invention has pixel blocks arranged in an array state, each pixel block comprising a first pixel detecting red light, a second pixel detecting green light, a third pixel detecting blue light, and a fourth pixel detecting light having a wavelength between the green light and the blue light or between the green light and the red light. Further, sensitivity of the fourth pixel to the above-mentioned light is kept lower than sensitivity of the second pixel to the green light.

Description

technical field [0001] The present invention relates to color image sensors and color filter arrays for use in color imaging devices such as electronic cameras and video cameras, and color imaging devices. Background technique [0002] Color image sensors have been commonly used in color imaging devices such as electronic cameras and video cameras. [0003] Generally, for a color imaging device, it is best to make the spectral sensitivity of the imaging optical system from the photographic lens to the color image sensor as close as possible to the spectral sensitivity of the human eye (or a known color matching function). [0004] The color image sensor has G pixels that detect green light, B pixels that detect blue light, and R pixels that detect red light arranged in an array state. [0005] In particular, the Bayer matrix has G pixels arranged in a checkerboard pattern and B pixels and R pixels alternately arranged in spaces between the G pixels. That is, one unit (pixe...

AI Technical Summary

Problems solved by technology

[0012] Incidentally, this problem does not arise when the color image sensor is converted to a multi-plate type because Y pixels can be added without reducing the number of G pixels, but this is not suitable for electronic cameras and Cameras, due to the increased configuration space relative to the necessity for branching the optical path and arranging the image sensors for the individual branches

[0013] Also, this problem does not arise when rotary switch filters are used because Y pixels can be added without reducing the number of G pixels, but this is less suitable for electronic cameras and video cameras that require miniaturization because similar to In the case of multi-plate type, the configuration space is increased

Images