Color television camera using only two camera tubes

Claim 2

A color television camera using two camera tubes, one tube being a color pick-up tube for obtaining a composite chrominance signal comprising individual signals corresponding to respective first and second colors components of a three primary color set, the other tube being an image pick-up tube for obtaining a luminance signal, said color pick-up tube having a target comprising a semiconductor single crystal substrate of a first conduction type, an insulator layer provided on the surface of one side of said substrate, a plurality of perforations arranged in a mosaic pattern in said insulator layer, a plurality of regions of a second conduction type which are provided on said one side surface of said substrate in registration with said perforations, a resistive film provided on said insulating layer about said one substrate surface and engaging said second conduction type regions through said insulator layer perforations, and a plurality of high concentration regions of first conduction type impurities arranged in parallel stripes on the other side surface of said substrate; said target being arranged in said color pick-up tube in such manner that said other surface provided with said plurality of high concentration regions may be exposed to light and that the longitudinal direction of each of said high concentration striped regions is perpendicular to a horizontal scan over said resistive layer by an electron beam; means for removing a third color component of said three primary colors from light originating from an image and for projecting light comprising said first and second color components onto said color pick-up tube, means for projecting a light including said third component onto said image pick-up tube for obtaining a luminance signal, and circuit means for obtaining from a signal at the output of said color pick-up tube including a first signal portion corresponding to both of first and second color components, anD a second signal portion corresponding to one of said first and second color components, two individual signals respectively corresponding to first and second color components.

Claim 3

The color television camera claimed in claim 1, in which said circuit means comprises; filter means for obtaining only said second signal component from said signal from the output of said color pick-up tube, and matrix circuit means for individually producing said two signals corresponding to said respective color components by receiving said signal having said first and second signal components, and said signal from said filtering means.

Claim 4

The color television camera claimed in claim 1, in which said circuit means comprises; circuit means for generating an index-pulse signal responsive to amplitude differences between said first and second signal components of said first signal portion, first circuit means coupled to said signal from said color pick-up tube and said index-pulse signal for deriving said first signal portion by sampling said signal from said color pick-up tube in accordance with said index-pulse signal, second circuit means coupled to said signal from said color pick-up tube and said index pulse signal for deriving said second signal portion by sampling said signal from said color pick-up tube in accordance with said index-pulse signal, and an arithmetic circuit for obtaining a signal corresponding to the other of said first and second color component from said first and second signal portions derived by said first and second circuit means.

Claim 5

The color television camera claimed in claim 1, in which said insulator layer of said target of said color pick-up tube further comprises slits extending at a boundary of each of said plurality of high concentration regions whereby an index-pulse signal may be included in the output signal from said color pick-up tube.

Claim 6

The color television camera claimed in claim 4, in which said circuit means comprises; first circuit means for deriving said index-pulse signal from said signal from said color pick-up tube, second circuit means for separating said signal from said color pick-up tube into said first signal portion and second signal portion by sampling said signal from said tube in accordance with said index-pulse signal from said first circuit means, and third circuit means for deriving a signal corresponding to the other of said first and second color components from said first and second signal portions from said second circuit means.

Claim 7

A color television camera using two camera tubes, one tube being a color pick-up tube for obtaining a chrominance signal comprising individual signals respectively corresponding to first and second colors components of a three primary color set, the other tube being an image pick-up tube for obtaining a luminance signal, said color pick-up tube having a target comprising; a semiconductor single crystal substrate of a first conduction type, a high concentration layer of said first conduction type provided on a surface of one side of said substrate, a plurality of first and second striped light filtering means alternately arranged in parallel about said high concentration layer, said first light filtering means passing only light of a first color component of said three primary colors and said second light filtering means passing only light of a second color component of said three primary colors, a plurality of regions of a second conduction type arranged in a mosaic pattern on the surface of the other side of said substrate other than striped regions corresponding to alternate boundary lines between said first and second filtering means, an insulator layer provided on said other side surface of said substrate, a plurality of perforations in said insulator means in registration with said plurality of regions of a second conduction type, and a resistive film provided on said insulator layer coating tHe entire surface thereof and engaging said second conduction type regions through said perforations in said insulator means; said target being arranged in said color pick-up tube such that said one side surface provided with said plurality of first and second filter means may be exposed to light and that the longitudinal direction of each of said first and second filter means is perpendicular to a horizontal scan on said resistive layer by an electron beam, and circuit means for obtaining from a signal including a first signal portion corresponding to said first color component, a second signal portion corresponding to said second color component, and an index-pulse signal component produced at an output of said color pick-up tube, said two individual signals.

Claim 8

A color television camera using two camera tubes, one tube being a color pick-up tube for obtaining a chrominance signal comprising individual signals respectively corresponding to first and second colors components of a three primary color set, the other tube being an image pick-up tube for obtaining a luminance signal, said color pick-up tube having a target comprising; a semiconductor single crystal substrate of a first conduction type, a high concentration layer of said first conduction type provided on a surface of one side of said substrate, a plurality of first and second striped light filtering means alternately arranged in parallel about said high concentration layer, said first light filtering means passing only light of a first color component of said three primary colors and said second light filtering means passing only light of a second color component of said three primary colors, a plurality of regions of a second conduction type arranged in a mosaic pattern on the surface of the other side of said substrate other than striped regions corresponding to alternate boundary lines between said first and second filtering means, an insulator layer provided on said other side surface of said substrate, a plurality of perforations in said insulator means in registration with said plurality of regions of a second conduction type, and a resistive film provided on said insulator layer coating tHe entire surface thereof and engaging said second conduction type regions through said perforations in said insulator means; said target being arranged in said color pick-up tube such that said one side surface provided with said plurality of first and second filter means may be exposed to light and that the longitudinal direction of each of said first and second filter means is perpendicular to a horizontal scan on said resistive layer by an electron beam, and circuit means for obtaining from a signal including a first signal portion corresponding to said first color component, a second signal portion corresponding to said second color component, and an index-pulse signal component produced at an output of said color pick-up tube, said two individual signals.

Claim 9

The color television camera claimed in claim 6, in which said circuit means comprises; first circuit means for deriving said index-pulse signal from said signal from said color pick-up tube, and second circuit means for individually deriving said first signal component and said second signal component from said signal from said color pick-up tube by sampling said output of said color pick-up tube in accordance with said index-pulse signal from said first circuit means.

Claim 10

In combination in a color television camera, a color tube including a semiconductor target, said target comprising a semiconductor substrate of a first conductivity type, said substrate having first and second surfaces, a spaced array of regions of a second conductivity type disposed about said first surface of said substrate, and a cyclically repeating pattern of light color filtering means oriented in a first direction at said second surface of said substrate; electron gun means for directing an electron beam toward said first substrate surface; and means for repetitively sweeping said electron beam in a direction orthogonal to said first direction.

Claim 11

In combination in a color television camera, a color tube including a semiconductor target, said target comprising a semiconductor substrate of a first conductivity type, said substrate having first and second surfaces, a spaced array of regions of a second conductivity type disposed about said first surface of said substrate, and a cyclically repeating pattern of light color filtering means oriented in a first direction at said second surface of said substrate; electron gun means for directing an electron beam toward said first substrate surface; and means for repetitively sweeping said electron beam in a direction orthogonal to said first direction.

Claim 12

A combination as in claim 8 further comprising optic means for directing a light pattern corresponding to a viewed image toward said second substrate surface.

Claim 13

A combination as in claim 9 further comprising means for deriving an output signal from said target during electron beam sweeping, said signal being of time division form comprising plural alternating time slots each bearing differing information descriptive of the color content of the viewed image; and plural detector means for recovering plural video chrominance signals.

Claim 14

A combination as in claim 10 wherein said target further comprises insulator and resistive layer means about said one substrate surface.

Claim 15

A combination as in claim 10 wherein said color filter means comprises spaced parallel filter stripes of a like spectral passing characteristic.

Claim 16

A combination as in claim 10 wherein said color filter means comprises contiguous, alternating parallel filter stripes of differing, cyclically repeating spectral passing characteristics.