Color image capture element and color image signal processing circuit
AssigneeSanyo Electric Co., Ltd.
InventorYoshihito Higashitsutsumi
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Abstract
A color image capture element comprises a plurality of color component photoelectric conversion elements, each disposed with a color filter on a light receiving surface for respectively transmitting different color components, for receiving incoming light and selectively outputting respective color signals corresponding to the intensity of the different color components, and an infrared component photoelectric conversion element, disposed with an infrared transmitting filter on a light receiving surface for transmitting an infrared component, for selectively outputting an infrared signal. This enables the infrared component included in at least one of a plurality of color signals to be corrected, thereby improving the sensitivity of a color image capture apparatus.
Claims7
A color signal processing circuit for performing white balance adjustment of color signals by obtaining said color signals and an infrared signal that are output from a color image capture element and controlling the gain of at least two signals among said color signals on the basis of said infrared signal, wherein
- the color image capture element comprises:
- a plurality of color components photoelectric conversion elements, each disposed with a color filter on a light receiving surface for respectively transmitting different color components, for receiving incoming light and selectively outputting respective color signals corresponding to the intensity of said different color components;
- and
- an infrared component photoelectric conversion element, disposed with an infrared component transmitting filter on a light receiving surface for transmitting an infrared component, for selectively outputting the infrared signal used to correct the infrared component included in at least one of the color signals.
A color signal processing circuit for compensating for an infrared component, wherein
- the color signal processing circuit obtains color signals and an infrared signal that are output from a color image capture element, wherein the color image capture element comprises:
- a plurality of color component photoelectric conversion elements, each disposed with a color filter on a light receiving surface for respectively transmitting different color components, for receiving incoming light and selectively outputting respective color signals corresponding to the intensity of said different color components;
- and
- an infrared component photoelectric conversion element, disposed with an infrared component transmitting filter on a light receiving surface for transmitting an infrared component, for selectively outputting the infrared signal used to correct the infrared component included in at least one of the color signals;
- and
- the color signal processing circuit subtracts, from each of said color signals is, a signal value obtained by multiplying the infrared signal by a coefficient in accordance with a ratio of infrared sensitivity of the corresponding color filter to infrared sensitivity of the infrared component transmitting filter.
Dependencies are inferred from the claim text.