US3558805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color signal generating apparatus
Assignee: Sony Corp
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Filing: 1967-06-14
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Granted: 1971-01-26
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Expires: 1987-06-14
Abstract
Abstract In a color video signal generating apparatus employing a single monochrome image pickup tube, an assembly of separating lenses disposed in front of the face plate of the tube to divide a real image of an object to be televised into stripelike image elements which are projected on the photoconductive layer of the tube and extend substantially at right angles to the scanning direction, and a color filter arrangement disposed in front of the separating lens assembly and having several filtering regions respectively passing light of different wavelength ranges to include, in each stripelike image element, corresponding color components; such filtering regions are arranged so that, considered in the direction across each stripelike image element, one of the color components is of substantially uniform intensity and other color components have different numbers of variations of intensity, whereby the image pickup tube produces a composite color video signal composed of nonfrequency modulated and different frequency modulated color video signals which can be easily frequency separated to obtain signals corresponding to color primaries.
Inventors
- 👤 Toshiro Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:30
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/10; H04N23/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
212 words
A color video signal generating apparatus comprising image pickup means having scanning means and being operative to photoelectrically convert light projected onto said image pickup means into an electrical output composed of successive signals corresponding to the intensities of light successively encountered by said scanning means in a line scanning direction, a screen of separating lenses to divide an image of an object to be televised into image elements projected onto corresponding areas of said image pickup means, and filter means interposed optically between the object to be televised and said screen, said filter means having several regions respectively selecting light of different wavelength ranges so that each of said image elements is composed of corresponding color components, said regions providing different numbers of variations of intensity of two of said color components of each image element considered in said line scanning direction, said filter means providing a substantially uniform intensity, considered in said line scanning direction, of one of said color components in each image element, whereby the signals corresponding to the respective color components cAn be easily separated out of said electrical output on the basis of their respective numbers of variations of amplitude and said separated one color component can be used directly as a color component video signal.
Claim 2
Dependent Claim
212 words
A color video signal generating apparatus comprising image pickup means having scanning means and being operative to photoelectrically convert light projected onto said image pickup means into an electrical output composed of successive signals corresponding to the intensities of light successively encountered by said scanning means in a line scanning direction, a screen of separating lenses to divide an image of an object to be televised into image elements projected onto corresponding areas of said image pickup means, and filter means interposed optically between the object to be televised and said screen, said filter means having several regions respectively selecting light of different wavelength ranges so that each of said image elements is composed of corresponding color components, said regions providing different numbers of variations of intensity of two of said color components of each image element considered in said line scanning direction, said filter means providing a substantially uniform intensity, considered in said line scanning direction, of one of said color components in each image element, whereby the signals corresponding to the respective color components cAn be easily separated out of said electrical output on the basis of their respective numbers of variations of amplitude and said separated one color component can be used directly as a color component video signal.
Claim 3
Dependent Claim
21 words
A color video signal generating apparatus according to claim 1; in which said image pickup means in an image pickup tube.
Claim 4
Dependent Claim
50 words
A color video signal generating apparatus according to claim 1; in which a particular number of variations corresponds to a particular center frequency, and said electrical output is a composite of nonfrequency modulated signals corresponding to said one color component and of frequency-modulated signals corresponding to said two color components.
Claim 5
Dependent Claim
26 words
A color video signal generating apparatus according to claim 3; further comprising electrical band-pass filters receiving said electrical output and separating said nonmodulated and modulated signals.
Claim 6
Dependent Claim
31 words
A color video signal generating apparatus according to claim 1; in which said regions of the filter means are transparent and operative to respectively transmit light of said different wavelength ranges.
Claim 7
Dependent Claim
21 words
A color video signal generating apparatus according to claim 5; in which said regions are portions of a single transparent plate.
Claim 8
Dependent Claim
28 words
A color video signal generating apparatus according to claim 5; in which said filter means includes a plurality of filters each constituting a respective one of said regions.
Claim 9
Dependent Claim
30 words
A color video signal generating apparatus according to claim 1; in which said regions of the filter means are selectively reflective with respect to light of said different wavelength ranges.
Claim 10
Dependent Claim
28 words
A color video signal generating apparatus according to claim 8; in which said filter means includes a plurality of mirrors each constituting a respective one of said regions.
Claim 11
Dependent Claim
36 words
A color video signal generating apparatus according to claim 1; in which said separating lenses are cylindrical lenses having their longitudinal axes parallel to each other and arranged at right angles to said line scanning direction.
Claim 12
Dependent Claim
31 words
A color video signal generating apparatus according to claim 1; in which said separating lenses are spherical and arranged in parallel rows directed at right angles to said line scanning direction.
Claim 13
Dependent Claim
73 words
A color video signal generating apparatus according to claim 1; in which said filter means, considered in said line scanning direction, is approximately uniformly transmissive with regard to green color light, has a varying transmissiveness with respect to red color light which increases and then decreases once in said line scanning direction, and has a varying transmissiveness with respect to blue color light which increases and decreases twice in said line scanning direction.
Claim 14
Dependent Claim
119 words
A color video signal generating apparatus according to claim 1; in which said filter means includes a transparent plate having at least one filter element thereon consisting of said regions at least some of which are respectively green, cyan, yellow and clear and arranged to transmit green color light through said plate over the entire area of said filter element, said clear and yellow regions transmitting red color light and being enclosed by a sinusoidal perimeter having a bisector parallel to said line scanning direction, and said cyan and clear regions transmitting blue color light being enclosed by a sinusoidal perimeter having a frequency different from that of the first-mentioned sinusoidal perimeter and the same bisector as the latter.
Claim 15
Dependent Claim
106 words
A color video signal generating apparatus according to claim 1; further comprising optical means to divide light from the object into three paths and then to compose the light in said three paths for projection onto said lens screen, and in which said filter means includes green, red and blue color filters interposed respectively in said three paths, one of said color filters being uniformly transmissive with respect to light of the respective color, and the other two of said color filters having different numbers of vAriations of transmissiveness of the respective colors considered in the direction thereacross which is parallel to said line scanning direction.
Claim 16
Dependent Claim
128 words
A color video signal generating apparatus according to claim 1; further comprising optical means to divide light from the object into three paths and then to compose the light in said three paths for projection onto said lens screen, said filter means being included in said optical means so that only red, green and blue color lights are respectively in said three paths, and first and second lens means being interposed in two of said paths, said first lens means condensing the respectively colored light into one thin and flat beam and said second lens means condensing the respectively colored light into two spaced, parallel, thin and flat beams, the largest cross-sectional dimensions of said thin and flat beams extending at right angles to said line scanning direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |