H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/43
H04N 9/44 (2006.01) H04N 9/07 (2006.01)
Patent
CA 1124841
ABSTRACT OF THE DISCLOSURE A color television signal generating apparatus comprises a color-revolving striped filter comprising a plurality of groups of filter stripes, said groups being disposed parallelly and consecutively in sequentially repeated arrangement, each of said groups comprising at least three filter stripes from among a first filter stripe having a light transmission characteristic such as to transmit the light of one of the three primary colors an addition mixture color, a second filter stripe having a light transmission characteristic such as to transmit the light of a mixed color of the primary color transmitted through said first filter stripe and one of the other two primary colors, and a transparent third filter stripe transmitting white light, said at least three filter stripes being arranged parallelly and consecu- tively in a specific sequence, a camera tube provided with said color-resolving striped filter disposed on the front surface there and operating to send out as an output signal a superimposed signal comprising in superimposition, a direct wave signal contain- ing signals of the three primary colors of said addition mixture color and a high-band component signal comprising a group of modulated color signals representable as signals resulting from the amplitude modulation respectively of a carrier wave of a frequency equal to a space frequency determined by the number of said groups of filter stripes and carrier wave components of frequencies having higher harmonic relationships to the frequency of said carrier wave by the signals of two primary colors other than the primary color of the light transmitted through said first filter stripe, separation means for separating said direct - 2 - wave signal from the output signal of said camera tube, high-band component signal producing means for obtaining said high-band component signal or a signal equivalent thereto from the output signal of said camera tube, first envelope detection means for producing as output a demodulated signal in accordance with an envelope resulting from a successive connection of peak values of the positive wave of the output signal of said high-band component signal producing means, second envelope detection means for producing as output a demodulated signal in accordance with an envelope resulting from a successive connection of peak values of the negative wave of the output signal of said high-band component signal producing means, and operational means for obtaining three primary-color signals by operating the output signals of said separation means and first and second envelope detection means. At least two of the filter stripes of said first, second, and third filter stripes of said color-resolving striped filter have transmission characteristics which have been so selected that graphical curves indicating said transmission characteristics mutually intersect. - 2a -
322696
Miyazaki Kenichi
Miyoshi Tadayoshi
Motoyama Koichiro
Nakagaki Shintaro
Takanashi Itsuo
Marks & Clerk
Victor Company Of Japan Ltd.
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