US4775885A — Color filter arrangement for CCD Imager

Claim 1

Independent Claim 149 words

A solid state image sensor of a frequency interleave system operable in the field storage mode comprising; a. a fundamental image sensing region formed of eight picture element portions arranged in four rows and two columns in a single plane; and b. color filters respectively formed on said picture element portions, wherein signals from two vertically-adjacent picture element portions of said fundamental image sensing region are combined to generate signals, which are then added and read out as a video signal, said color filters formed on a first group of said picture element portions in a first column, in its first to third rows, and said picture element portion in a second column, in its fourth row, being made to have transmissivity to a green color light selected to be about 50% of those of said color filters formed on a second group of the other picture element portions.

Claim 2

Dependent Claim 149 words

A solid state image sensor of a frequency interleave system operable in the field storage mode comprising; a. a fundamental image sensing region formed of eight picture element portions arranged in four rows and two columns in a single plane; and b. color filters respectively formed on said picture element portions, wherein signals from two vertically-adjacent picture element portions of said fundamental image sensing region are combined to generate signals, which are then added and read out as a video signal, said color filters formed on a first group of said picture element portions in a first column, in its first to third rows, and said picture element portion in a second column, in its fourth row, being made to have transmissivity to a green color light selected to be about 50% of those of said color filters formed on a second group of the other picture element portions.

Claim 3

Dependent Claim 40 words

A solid state image sensor according to claim 1, wherein said transmissivity of said first group is selected in a range from 20% to 80% of those of said color filters formed on said second group of picture element portions.

Claim 4

Dependent Claim 46 words

A solid state sensor according to claim 1, wherein the fiIters for said first group comprises individual filters for transmitting (G/2+R) and (G/2+B), where R, G and B designate intensities of red, green and blue transmitted light, respectively, and in which G/2+R+G/2+B is substantially white light.

Claim 5

Dependent Claim 50 words

A solid state sensor according to claim 1, wherein said first group comprises individual filters for transmitting B, G and B designate intensities of red, green and blue transmitted light, respectively, and G/2 designates one-half the intensity of green light to form white light when added to R and B.

Claim 6

Dependent Claim 51 words

A solid state sensor according to claim 1, wherein said first group comprises individual filters for transmitting G/2+B, B+G/2+R, G/2+B and G/2+R, where intensities or red, green and blue transmitted light, respecitvely, and G/2 designates one-half the intensity of green light to form white light when added to R and B.

Claim 7

Dependent Claim 49 words

A solid state sensor according to claim 1, wherein said first group comprises individual filters for transmitting B+G/2+R and G/2+R, where intensities of red, green and blue transmitted light, respectively, and G/2 designated one-half the intensity of green light to form white light when added to R and B.

Claim 8

Independent Claim 127 words

A method of deriving color signals from a solid state image sensor of a frequency interleave system operable in the field storage mode, comprising the steps of: forming a solid state sensor with a plurality of fundamental image sensing regions, each having a plurality of picture element portions arranged in rows and columns in a single plane, and providing first and second sets of color filters for said picture elements, said first and second sets having the same number of filters, said filters each transmitting predetermined proportions of red, green and blue light incident on said filter, the filters of said first set of filters each being substantially transparent to green light and the other set of filters having a transmissivity for green light of approximately 50%.

Claim 9

Independent Claim 127 words

A method of deriving color signals from a solid state image sensor of a frequency interleave system operable in the field storage mode, comprising the steps of: forming a solid state sensor with a plurality of fundamental image sensing regions, each having a plurality of picture element portions arranged in rows and columns in a single plane, and providing first and second sets of color filters for said picture elements, said first and second sets having the same number of filters, said filters each transmitting predetermined proportions of red, green and blue light incident on said filter, the filters of said first set of filters each being substantially transparent to green light and the other set of filters having a transmissivity for green light of approximately 50%.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1991-10-04	1992-04-04	1992-10-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-10-04	1996-04-04	1996-10-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-10-04	2000-04-04	2000-10-04	$7700.00	Window Closed / Lapsed

Color filter arrangement for CCD Imager

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