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公开(公告)号：DE3574553D1
公开(公告)日：1990-01-04
申请号：DE3574553
申请日：1985-08-30
Applicant: SONY CORP
Inventor： TSUCHIYA SATOSHI , AOYAGI MINORU , KUNIYOSHI YASUNOBU
Abstract: An automatic white balance control circuit includes a main photo-sensor (11) from which three primary color signals are derived (12), three external light sensing elements (21R, 21G, 21B) having spectral characteristics the same as those of the main photo-sensor (11), three capacitors (24R, 24G, 24B) for converting output currents from the three external light sensing elements to respective voltages, a voltage comparator (34) for comparing a voltage across at least the one capacitor (24G) corresponding to green light with a reference voltage (35), and three sample-and-hold circuits (27R, 28R; 27G, 28G; 27B, 28B) for sampling and holding voltages from the three capacitors (24R, 24G, 24B), respectively. Charging of the three capacitors by output currents from the three external light sensing elements, respectively, is started at the commencement of each cycle. When the voltage comparator (34) produces a compared output in response to the voltage across the one capacitor (24G) having become equal to the reference voltage, the charging is stopped and the voltages then present on the three capacitors are sampled and held by the three sample-and-hold circuits to thereby provide white balance control signals by which the level ratios of the three primary color signals derived from the main photo-sensor are controlled to be 1:1:1 thereby to adjust the white balance.
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公开(公告)号：FR2476418B1
公开(公告)日：1985-01-04
申请号：FR8103016
申请日：1981-02-16
Applicant: SONY CORP
Inventor： KUNIYOSHI YASUNOBU , OKADA TOKASHI
Abstract: A control apparatus for controlling a plurality of characteristics, such as hue, color, brightness, sound and the like, of a reproduced video picture includes a transmitter having a memory for storing data entries corresponding to the characteristics to be controlled, a central processing unit to change selected ones of the stored data entries and a plurality of switches for controlling the central processing unit to change selected ones of the stored data entries in response to actuation of selected ones of the switches, whereby the transmitter transmits the stored data entries, as changed; a receiver including a shift register in which the transmitted control data entries are serially received and converted into parallel control data entries, a D-A converter for producing a plurality of analog control voltages in response to the parallel control data entries from the shift register; and a plurality of voltage-controlled circuits for controlling the plurality of characteristics in response to the plurality of analog control voltages.
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公开(公告)号：CH626208A5
公开(公告)日：1981-10-30
申请号：CH1392877
申请日：1977-11-15
Applicant: SONY CORP
Inventor： KUNIYOSHI YASUNOBU , OKADA TAKASHI , SUMI TAKAO
Abstract: In apparatus for processing an information signal, such as, the chrominance component of a reproduced color video signal, time base errors composed of phase and frequency errors are eliminated by detecting phase and frequency errors, respectively, of the chrominance component, frequency converting the chrominance component with a frequency converting signal which is generated, at least in part, by means of a variable frequency oscillator, controlling such oscillator by an automatic phase control circuit (APC) in response to detected phase errors within a predetermined or lock-in range of the APC so as to eliminate such phase errors from the frequency converted chrominance component, and further controlling the variable frequency oscillator in response to only those detected frequency errors which correspond to time base errors beyond the lock-in range of the APC for returning to within such range.
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公开(公告)号：AU1123676A
公开(公告)日：1977-09-01
申请号：AU1123676
申请日：1976-02-19
Applicant: SONY CORP
Inventor： KUNIYOSHI YASUNOBU , NARAHARA HISAAKI , TSUCHIYA TAKAO
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公开(公告)号：DE2938994C2
公开(公告)日：1993-11-04
申请号：DE2938994
申请日：1979-09-26
Applicant: SONY CORP
Inventor： OKADA TAKASHI , KUNIYOSHI YASUNOBU
Abstract: A filter circuit whose cut-off frequency is easily controlled and which can be manufactured as an integrated circuit. The base electrode of a first transistor is connected to an input terminal by a reactance element, such as a capacitor. Second and third transistors are connected in differential amplifier configuration, and a current source is connected to the common connection of the emitter electrodes thereof. The emitter electrode of the first transistor is connected to the base electrode of the second transistor and the base electrode of the first transistor is connected to the collector electrode of the second transistor. An output terminal is connected to at least one of the collector and emitter electrodes of the first transistor.
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Patent Agency Ranking
公开(公告)号：CA1215168A
公开(公告)日：1986-12-09
申请号：CA489929
申请日：1985-09-03
Applicant: SONY CORP
Inventor： TSUCHIYA SATOSHI , AOYAGI MINORU , KUNIYOSHI YASUNOBU
Abstract: AUTOMATIC WHITE BALANCE CONTROL CIRCUIT A fully automatic white balance control circuit which is sensitive to changes in the ambient or incident illumination as well as to changes in the object being viewed includes a main photo-sensor having a video output from which three primary color signals are derived, three external or incident light sensing elements having spectral characteristics the same as those of the main photo-sensor for the three primary colors, three capacitors for converting output currents from the three external light sensing elements to respective voltages, a voltage comparator for comparing a voltage across at least the one capacitor corresponding to green light with a reference voltage, and three sample-and-hold circuits for sampling and holding voltages from the three capacitors, respectively. Charging of the three capacitors by output currents from the three external light sensing elements, respectively, is started at the commencement of each cycle, for example, each vertical period, and, when the voltage comparator produces a compared output in response to the voltage across the one capacitor having become equal to the reference voltage, the charging is stopped and the voltages then present on the three capacitors are sampled and held by the three sample-and-hold circuits to thereby provide white balance control signals by which the level ratios of the three primary color signals derived from the main photo-sensor are controlled to be 1:1:1 whereby to adjust the white balance.
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公开(公告)号：CA1166742A
公开(公告)日：1984-05-01
申请号：CA370838
申请日：1981-02-13
Applicant: SONY CORP
Inventor： KUNIYOSHI YASUNOBU , OKADA TAKASHI
Abstract: A control apparatus for controlling a plurality of functions is described in which a plurality of control data are serially transferred to a shift register where they are converted into parallel control data, the above converted control data are supplied to a D-A converter to produce a plurality of analog control voltages and also a predetermined control data among the plurality of control data is preset to a previously determined data by a single operation.
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公开(公告)号：CA1117648A
公开(公告)日：1982-02-02
申请号：CA312677
申请日：1978-10-04
Applicant: SONY CORP
Inventor： OKADA TAKASHI , KUNIYOSHI YASUNOBU , TOMINAGA KIYONORI
Abstract: In an automatic phase control circuit having a predetermined lock-in range wherein the oscillating signal produced by the adjustable oscillator of the automatic phase control circuit is used in combination with an input signal to derive a signal whose phase is compared to a reference signal, the phase difference between the derived signal and the reference signal being used as a phase control signal for the oscillator so as to minimize this phase difference and thus lock the phase of the derived signal to that of the reference signal, a method of adjusting the oscillator in the event that the phase relation between the oscillating signal and the input signal is outside the lock-in range. During recurrent intervals, which vary with time base errors in the input signal, the number of cycles of the oscillating signal is counted. The count is examined to determine whether it is within a predetermined range of a predetermined count, and if outside this range, the oscillating frequency of the oscillator is adjusted in a direction to return the count to within this predetermined range. In a preferred embodiment, this automatic phase control circuit is used to eliminate time-base errors in at least the chrominance signal of a composite color video signal. In such an embodiment, the adjustable oscillator is used in a frequencyconverter for converting the frequency of at least the chrominance signal from an input frequency to a different frequency, and it is the phase of the frequency-converted chrominance signal which is compared to the reference signal.
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公开(公告)号：DE2938994A1
公开(公告)日：1980-04-17
申请号：DE2938994
申请日：1979-09-26
Applicant: SONY CORP
Inventor： OKADA TAKASHI , KUNIYOSHI YASUNOBU
Abstract: A filter circuit whose cut-off frequency is easily controlled and which can be manufactured as an integrated circuit. The base electrode of a first transistor is connected to an input terminal by a reactance element, such as a capacitor. Second and third transistors are connected in differential amplifier configuration, and a current source is connected to the common connection of the emitter electrodes thereof. The emitter electrode of the first transistor is connected to the base electrode of the second transistor and the base electrode of the first transistor is connected to the collector electrode of the second transistor. An output terminal is connected to at least one of the collector and emitter electrodes of the first transistor.
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公开(公告)号：AU4052678A
公开(公告)日：1980-04-17
申请号：AU4052678
申请日：1978-10-09
Applicant: SONY CORP
Inventor： OKADA TAKASHI , KUNIYOSHI YASUNOBU , TOMINAGA KIYONORI
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