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    • 53. 发明专利
    • DRIVE CIRCUIT FOR FLAT C.R.T. COLOUR DISPLAY APPARATUS
    • AU541358B2
    • 1985-01-03
    • AU7521981
    • 1981-09-14
    • SONY CORP
    • SHIMADA SATOSHI
    • H04N9/22H01J31/12H04N5/68H04N9/12H04N3/22H04N5/48H04N9/18
    • An image display apparatus includes a phosphor screen which is divided into a plurality of phosphor screen portions arranged in both horizontal and vertical directions, a set of an electron gun and horizontal and vertical deflection devices provided in opposed relation to each of the divided phosphor screen portions, the electron gun being formed integrally of a common metal plate at plural divided phosphor screen portions at least adjacent in both horizontal and vertical directions, a circuit for driving the deflecting devices at the same time over all the surface of the phosphor screen, a circuit for the vertical deflection device at a horizontal period in a step, a device for memorizing at least one period of a video signal, and a circuit for dividing the video signal in accordance with the division in the horizontal direction, reading out divided video signals separately and simultaneously and supplying read-out video signals to the electron guns arranged on one line in the horizontal direction, wherein the phosphor screen is formed of red, green and blue color phosphor stripes and a black guard band, which are repeated arranged with a predetermined pitch, the guard band being located at a position coincident with the divided position of the phosphor screen in the horizontal direction.
    • 56. 发明专利
    • NL8301179A
    • 1984-11-01
    • NL8301179
    • 1983-04-01
    • PHILIPS NV
    • H03D1/24H04B1/30H04N5/44H04B1/26H04N5/50H04N5/48H04N5/60H03D7/00
    • The receiver comprises a pair of signal paths arranged in parallel between an RF-input (5) and a superposition circuit (8) and includes, arranged in succession, a pair of first mixing stages (1, 1 min ) the signals from an RF-tuning oscillator (To), being applied in a phase quadrature relationship to these first mixing stages a pair of filtering elements (3, 3 min ) for signal selection and a pair of second mixing stages (2, 2 min ), the signals from a fixed LF-oscillator (Fo), being applied also in a phase-quadrature relationsip to these second mixing stages. The superposition circuit comprising an adding stage (8) arranged between outputs of the two signal paths and producing a first output signal (1). An amplitude and phase balance between the two signal paths is established by an amplitude and phase control of the signals in the two signal paths in dependence on the amplitude and phase of the image interference in the output signal of the superposition circuit. The amplitude of this image interference component is measured by detecting the image interference component phase-synchronously, the reference frequency being the detection carrier, and the phase of this image interference component is measured by detecting the image interference component synchronously by means of a detection carrier whose phase is shifted through 90 DEG relative to the reference frequency. The of necessity equal frequency position between the reference frequency and its image interference component is obtained by means of frequency mirror-inversion.