Solid-state image sensor
First Claim
1. A solid-state image sensor, comprising:
- a plurality of pixels which are formed in matrix form on a semiconductor substrate, each pixel having a photoelectric converting element which outputs an electric signal obtained by photoelectric conversion;
a read-out circuit configured to read out the electric signals outputted from the plurality of pixels; and
a signal processing section configured to perform signal processing with respect to the electric signals read out from the read-out circuit,wherein the plurality of pixels includes;
a plurality of first pixels which leads incident light of a visible light wavelength band to a corresponding photoelectric conversion element via a transparent layer;
a plurality of second pixels, each having a first color filter having a higher transmissivity in a first visible light wavelength band within the visible light wavelength band, as compared to a transmissivity in a first remaining portion of the visible light wavelength band outside the first visible wavelength band;
a plurality of third pixels, each having a second color filter having a higher transmissivity in a second visible light wavelength band, different from the first visible light wavelength band, within the visible light wavelength band, as compared to a transmissivity in a second remaining portion of the visible light wavelength band outside the second visible wavelength band; and
a plurality of fourth pixels, each having a third color filter having a higher transmissivity in a third visible light wavelength band, different from the first and second visible light wavelength bands, within the visible light wavelength band, as compared to a third remaining portion of the visible light wavelength band outside the third visible wavelength band,wherein the signal processing section includes;
a color acquisition section configured to acquire a first color data value C1, a second color data value C2, a third color data value C3 and a white color data value W in a target pixel block including a plurality of pixels to perform signal process;
a color separation processing section configured to separate the white data value into a plurality of colors based on the following Expressions (2) to (4) to generate the first color data value C1w of a first color, the second color data value C2w of a second color and the third color data value C3w of a third color;
C1W←
W·
K1
(2)
C2W←
W·
K2
(3)
C3W←
W·
K3
(4)where K1, K2, and K3 indicate color ratios, and are determined by the color data values C1, C2 and C3.
1 Assignment
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Accused Products
Abstract
A solid-state image sensor has a plurality of pixels, a read-out circuit and a signal processing section. The plurality of pixels includes a plurality of first pixels, a plurality of second pixels, a plurality of third pixels and a plurality of fourth pixels. The signal processing section includes a color acquisition section, a first judgment section configured to determine whether or not the white data value W in the target pixel block is smaller than a predetermined first set value, and a white color correction section configured to perform correction processing of the white color data value W in the target pixel block based on the following Expression (1) when the judgment result of the first judgment section is NO, and to output the white data value W by itself without performing the correction processing based on the Expression (1) when the judgment result of the first determination section is YES;
W′=S1C1+S2C2+S3C3 (1)
- where each of S1, S2, and S3 is a coefficient that is determined based on a color balance.
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Citations
7 Claims
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1. A solid-state image sensor, comprising:
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a plurality of pixels which are formed in matrix form on a semiconductor substrate, each pixel having a photoelectric converting element which outputs an electric signal obtained by photoelectric conversion; a read-out circuit configured to read out the electric signals outputted from the plurality of pixels; and a signal processing section configured to perform signal processing with respect to the electric signals read out from the read-out circuit, wherein the plurality of pixels includes; a plurality of first pixels which leads incident light of a visible light wavelength band to a corresponding photoelectric conversion element via a transparent layer; a plurality of second pixels, each having a first color filter having a higher transmissivity in a first visible light wavelength band within the visible light wavelength band, as compared to a transmissivity in a first remaining portion of the visible light wavelength band outside the first visible wavelength band; a plurality of third pixels, each having a second color filter having a higher transmissivity in a second visible light wavelength band, different from the first visible light wavelength band, within the visible light wavelength band, as compared to a transmissivity in a second remaining portion of the visible light wavelength band outside the second visible wavelength band; and a plurality of fourth pixels, each having a third color filter having a higher transmissivity in a third visible light wavelength band, different from the first and second visible light wavelength bands, within the visible light wavelength band, as compared to a third remaining portion of the visible light wavelength band outside the third visible wavelength band, wherein the signal processing section includes; a color acquisition section configured to acquire a first color data value C1, a second color data value C2, a third color data value C3 and a white color data value W in a target pixel block including a plurality of pixels to perform signal process; a color separation processing section configured to separate the white data value into a plurality of colors based on the following Expressions (2) to (4) to generate the first color data value C1w of a first color, the second color data value C2w of a second color and the third color data value C3w of a third color;
C1W←
W·
K1
(2)
C2W←
W·
K2
(3)
C3W←
W·
K3
(4)where K1, K2, and K3 indicate color ratios, and are determined by the color data values C1, C2 and C3. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification