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公开(公告)号：AU578417B2
公开(公告)日：1988-10-27
申请号：AU2808284
申请日：1984-05-16
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY
Abstract: A color television receiver includes a network for automatically limiting excessive kinescope beam currents developed in response to video signal image information, and a white balance control network for automatically controlling the white level drive (gain) characteristics of the kinescope in response to a white drive reference signal applied to the video signal path during given measuring intervals. A control signal developed by the beam current limiter network, otherwise applied to the video signal path, is decoupled from the video signal path during the white level measuring intervals to prevent distortion of the white level control function.
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公开(公告)号：IT1194811B
公开(公告)日：1988-09-28
申请号：IT2272081
申请日：1981-07-02
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY
Abstract: An inverter applies a square-wave exciting voltage of horizontal deflection frequency to the primary winding of a ferroresonant power transformer. A square-wave alternating polarity output voltage developed across a secondary winding of the ferroresonant transformer is half-wave rectified and applied to an input choke of a horizontal deflection circuit. The input choke is coupled to the series arrangement of a horizontal deflection winding and a trace capacitor. A pincushion correction circuit switching transistor applies a DC voltage to the input choke at a controlled instant within the nonconduction interval of the half-wave rectified output voltage. The peak-to-peak horizontal scanning current is a function of the average voltage developed across the trace capacitor. This average voltage equals the average value of the voltage applied to the input choke. By varying at a vertical rate in a parabolic manner the controlled instant at which the switching transistor applies the DC voltage to the input choke, the peak-to-peak horizontal scanning current is modulated at a vertical rate in a parabolic manner to provide side pincushion correction.
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公开(公告)号：FI76464B
公开(公告)日：1988-06-30
申请号：FI841967
申请日：1984-05-16
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY
Abstract: A color television receiver includes a network for automatically limiting excessive kinescope beam currents developed in response to video signal image information, and a white balance control network for automatically controlling the white level drive (gain) characteristics of the kinescope in response to a white drive reference signal applied to the video signal path during given measuring intervals. A control signal developed by the beam current limiter network, otherwise applied to the video signal path, is decoupled from the video signal path during the white level measuring intervals to prevent distortion of the white level control function.
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公开(公告)号：FR2497431B1
公开(公告)日：1988-06-10
申请号：FR8124317
申请日：1981-12-28
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY
Abstract: A television system for developing a regulated B + scan supply voltage includes a deflection generator (40) with a deflection winding (41); a transformer (22) having a primary winding (22a) coupled to a source (21) of unregulated alternating input voltage for developing across secondary windings (22c, d) an alternating voltage that tends to vary with variations of the unregulated voltage; means (27, 28) responsive to the secondary winding alternating voltage for developing a B + scan supply voltage; and means (32, 39) for applying the B + scan supply voltage to the deflection generator (40) to develop scanning current in the deflection winding. A saturable core (137) with a load coil (37) wound on it is conductively coupled to and magnetically isolated from the transformer secondary windings (22c, d). The load coil (37) is responsive to, and provides regulation of, the transformer secondary winding alternating voltage for developing the regulated B + scan supply voltage.
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公开(公告)号：GB2198010A
公开(公告)日：1988-06-02
申请号：GB8725942
申请日：1987-11-05
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY
Abstract: An interpolating apparatus for generating a pair of non-identical, interlaced fields from a single stored field of video signal. One of the interlaced fields is generated by adding three-fourths of one line's amplitude to one-fourth of the next line's amplitude. The other interlaced field is generated by adding one-fourth of said one line's amplitude to three-fourths of the next line's amplitude.
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Patent Agency Ranking
公开(公告)号：FR2504338B1
公开(公告)日：1987-07-10
申请号：FR8206692
申请日：1982-04-19
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY
Abstract: The primary winding of a high leakage inductance transformer is coupled to a source of alternating input voltage to develop alternating polarity output voltages across tightly coupled secondary windings, including a high voltage winding of the transformer. Various DC supply voltages, including the ultor voltage, are derived from the secondary winding output voltages. To regulate the secondary winding output voltages, a ferroresonant circuit comprising a capacitor and a saturable reactor is coupled as a load circuit to one of the transformer secondary windings. When the saturable reactor magnetically saturates during each half cycle of the alternating polarity output voltage, a circulating current is generated and flows between the saturable reactor and the capacitor. To enhance the power supply efficiency and reduce the temperature rise within the magnetizable core of the saturable reactor, the parameters of the transformer and ferroresonant load circuit are selected so as to generate a relatively low amplitude circulating current. To improve output voltage regulation when a low amplitude circulating current is developed, a compensating drive winding is provided that is magnetically tightly coupled with the primary winding of the high leakage transformer. The compensating drive winding is coupled in series with the saturable reactor winding across the capacitor and polarized relative to the capacitor coupled transformer secondary so as to oppose the tendency of the output voltage amplitude or half-cycle volt-second area to vary with variations in input voltage amplitude.
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公开(公告)号：IT1168975B
公开(公告)日：1987-05-20
申请号：IT2389983
申请日：1983-11-25
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY
Abstract: A switched mode power supply for a remote controlled television receiver incorporates a degaussing circuit having a relay that is required to be energized in order to permit operation of the degaussing circuit. Power to energize the relay is derived from a power supply switch transistor protection circuit which removes residual stored energy from the power transformer primary winding. This stored energy is used to charge a capacitor during the time the switch transistor is nonconductive. The capacitor is discharged to provide current to energize the deguassing circuit relay in order to permit ac mains current to flow through the degaussing coil.
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公开(公告)号：DE3625933A1
公开(公告)日：1987-02-12
申请号：DE3625933
申请日：1986-07-31
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY , FLING RUSSELL THOMAS , CHRISTOPHER TODD J
Abstract: A speed-up memory doubles the field rate of a video input signal by repeating each field to reduce flicker when the double field rate signal is displayed. Read/write clocks for controlling the memory are locked to the color subcarrier of the video input signal thereby tending to produce visual artifacts in the displayed image due to clock skew relative to sync when non-standard video signals are processed. The skew errors are corrected by circuitry which measures the skew of the read and write clocks and delays the video signal as a function of a difference between the clock skew measurements.
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公开(公告)号：GB2178266A
公开(公告)日：1987-02-04
申请号：GB8617176
申请日：1986-07-15
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY
Abstract: A digital sample rate reduction apparatus receives an input signal occurring at a given sample rate and produces an output signal occurring at a rate which is two-thirds the input sample rate. One half of the output samples are interpolated samples and the other half are original input samples.
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公开(公告)号：DE3624030A1
公开(公告)日：1987-01-22
申请号：DE3624030
申请日：1986-07-16
Applicant: RCA CORP
Inventor： WILLIS DONALD HENRY
Abstract: A digital sample rate reduction apparatus receives an input signal occurring at a given sample rate and produces an output signal occurring at a rate which is two-thirds the input sample rate. One half of the output samples are interpolated samples and the other half are original input samples.
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