Solid-state imaging apparatus and imaging system

Abstract

A solid-state imaging apparatus wherein pixels have same color filter in a same row, and have different color filters in different rows; and a color selecting unit selects and outputs, in an order of colors, the signals held by the plurality of holding units, to meet: y=ax+(b/c−d)x, wherein the pixels are arranged at a pitch “x” in a same row direction, and arranged at a pitch “y” in a same column direction, the “a” is a first coefficient equal to or larger than 1, the “b” is a shift of a charge accumulation period of the pixels in one row from a charge accumulation period of the pixels in a row adjacent to the one row, the “c” is a period of outputting the signals from the selecting unit, the signals generated by the plurality of pixels and the “d” is a second coefficient that is equal to or larger than 0 and equal to or less than 0.15.

What is claimed is:  
     
       1. A solid-state imaging apparatus comprising:
 a pixel array having a plurality of pixels arranged in a matrix and generating a signal by photoelectric conversion, wherein pixels in a same row have optical filters of a same color, while pixels in different rows have optical filters of different colors; 
 a plurality of holding units each holding the signal from each of the plurality of pixels; and 
 a color selecting unit configured to select, successively in an order of colors, the signals held by the plurality of holding units, to meet a relation:
     y=ax +( b/c−d ) x,    
 
 wherein the plurality of pixels are arranged at a pitch of the “x” in a same row direction, the plurality of pixels are arranged at a pitch of the “y” in a same column direction, the “a” is a first coefficient, the “b” is a shift of a charge accumulation period of pixels in a one row from a charge accumulation period of pixels in a row adjacent to one row, the “c” is a period of outputting, from the color selecting unit, the signals generated by the plurality of pixels and the “d” is a second coefficient, and wherein the first coefficient “a” is an integer equal to or larger than 1, and the second coefficient “d” is a value that is equal to or larger than 0 and equal to or less than 0.15. 
 
     
     
       2. The solid-state imaging apparatus according to  claim 1 , wherein
 the pixel array has 
 a row of pixels having an optical filter transmitting a light of red color, 
 a row of pixels having an optical filter transmitting a light of green color, and 
 a row of pixels having an optical filter transmitting a light of blue color. 
 
     
     
       3. The solid-state imaging apparatus according to  claim 2 , wherein
 the pixel array has a row of pixels capable of receiving the lights of red, green and blue colors, 
 in a color read out mode, the row of pixels having the optical filter transmitting the light of red color, the row of pixels having the optical filter transmitting the light of green color, and the row of pixels having the optical filter transmitting the light of blue color output the signals, and 
 in a monochromatic read out mode, the row of pixels capable of receiving the lights of red, green and blue colors outputs the signals. 
 
     
     
       4. The solid-state imaging apparatus according to  claim 1 , wherein
 each of the plurality of pixels has 
 a photoelectric conversion portion configured to convert light photo-electrically into an electric charge, and accumulate the electric charge, 
 a floating diffusion configured to convert the electric charge into a voltage, 
 a transfer transistor configured to transfer the electric charge to the floating diffusion, 
 an amplifying transistor configured to output a voltage according to the voltage from the floating diffusion, and 
 a reset transistor configured to reset the electric charge of the floating diffusion and the photoelectric conversion portion. 
 
     
     
       5. The solid-state imaging apparatus according to  claim 4 , wherein
 each of the plurality of pixels has further a selecting transistor configured to output selectively the voltage outputted from the amplifying transistor configured to output a voltage. 
 
     
     
       6. The solid-state imaging apparatus according to  claim 4 , wherein
 a start time of the charge accumulation period is the same as or after an end time of the reset of the electric charge of the photoelectric conversion portion by the reset transistor and the transfer transistor. 
 
     
     
       7. An imaging system comprising:
 the solid-state imaging apparatus according to any one of  claims 1  to  6 ; and 
 a signal processing unit configured to correct a color shift based on an output signal from the solid-state imaging apparatus. 
 
     
     
       8. The imaging system according to  claim 7 , further comprising:
 a color shift quantity calculating unit configured to calculate a color shift quantity in a direction of arranging the pixels in a same column, based on an output signal from the signal processing unit, and to control a shift “b” of the charge accumulation periods of the solid-state imaging apparatus.