RU97100939A - VIDEO SYSTEM WITH A POWER SOURCE OF A SCREENING NETWORK RESPONDING TO THE ARNS SYSTEM - Google Patents

VIDEO SYSTEM WITH A POWER SOURCE OF A SCREENING NETWORK RESPONDING TO THE ARNS SYSTEM

Info

Publication number
RU97100939A
RU97100939A RU97100939/09A RU97100939A RU97100939A RU 97100939 A RU97100939 A RU 97100939A RU 97100939/09 A RU97100939/09 A RU 97100939/09A RU 97100939 A RU97100939 A RU 97100939A RU 97100939 A RU97100939 A RU 97100939A
Authority
RU
Russia
Prior art keywords
signal
black level
potential
grid
kinescope
Prior art date
Application number
RU97100939/09A
Other languages
Russian (ru)
Other versions
RU2215336C2 (en
Inventor
Фрэнк Грипентрог Дэл
Original Assignee
Томсон Конзьюмер Электроникс, Инк.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Томсон Конзьюмер Электроникс, Инк. filed Critical Томсон Конзьюмер Электроникс, Инк.
Publication of RU97100939A publication Critical patent/RU97100939A/en
Application granted granted Critical
Publication of RU2215336C2 publication Critical patent/RU2215336C2/en

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Claims (4)

1. Устройство для регулирования уровня черного кинескопа (30), содержащее средство (+20 B) приложения опорного потенциала к управляющей сетке (G1) кинескопа, средство (90) приложения потенциала экранирующей сетки к экранирующей сетке кинескопа, средство (50) подачи видеосигнала на катод кинескопа, средство (56) подачи сигнала индикации тока луча (S6), средство (61, 65) для получения сигнала индикации уровня черного (Va) из сигнала индикации тока луча, средство (62, 50) для подачи тока регулирования уровня черного (Ia) на катод (36) в качестве функции сигнала индикации уровня черного (Va) для формирования цепи управления APHC, имеющей диапазон управления уровнем черного, средство регулирования (80) для регулирования потенциала экранирующей сетки в качестве функции сигнала индикации уровня черного для формирования второй цепи управления уровнем черного для расширения диапазона управления уровнем черного.1. A device for controlling the level of a black kinescope (30), comprising means (+20 B) for applying the reference potential to the control grid (G1) of the kinescope, means (90) for applying the potential of the shielding grid to the shielding grid of the kinescope, means (50) for supplying a video signal to picture tube cathode, means (56) for supplying a beam current indication signal (S6), means (61, 65) for receiving a black level indication signal (Va) from a beam current indication signal, means (62, 50) for supplying a black level control current ( Ia) to the cathode (36) as a function of the signal black (Va) level tion for forming APHC control circuit having a black level control range, adjustment means (80) for adjusting the screen grid potential as a function of a signal indicating black level to form a second black level control circuit for expanding the black level control range. 2. Устройство по п. 1, которое содержит средство (81) для сравнения сигнала уровня черного (Va) с сигналом опорного уровня (+2,2 B) для получения сигнала управления (S9) и средства (82, 84, 85, 88) для подачи сигнала управления к узлу схемы (99) в источнике напряжения экранирующей сетки (90) для регулирования потенциала экранирующей сетки. 2. The device according to claim 1, which comprises means (81) for comparing the black level signal (Va) with the reference level signal (+2.2 B) for receiving a control signal (S9) and means (82, 84, 85, 88 ) to supply a control signal to the circuit node (99) in the voltage source of the shielding grid (90) to regulate the potential of the shielding grid. 3. Устройство по п. 1, в котором кинескоп содержит цветной кинескоп, имеющий три катода и общую экранирующую сетку и дополнительно содержит средство (40, 42, 44) для генерации отдельного сигнала представления уровня черного для каждого катода (32, 34, 36) и средство (72, 80) для регулирования потенциала экранирующей сетки в качестве функции минимального из сигналов представления уровня черного. 3. The device according to claim 1, in which the kinescope contains a color kinescope having three cathodes and a common screening grid and further comprises means (40, 42, 44) for generating a separate signal for representing the black level for each cathode (32, 34, 36) and means (72, 80) for adjusting the potential of the shielding grid as a function of the minimum of the black level representation signals. 4. Устройство по п. 1, которое дополнительно содержит средство для мгновенного понижения потенциала экранирующей сетки при начальном приложении рабочего напряжения к кинескопу. 4. The device according to p. 1, which further comprises means for instantly lowering the potential of the shielding grid at the initial application of the operating voltage to the tube.
RU97100939/09A 1994-06-17 1995-05-30 Video system with power supply for screen grid responding to system automatic adyustment of kinescope voltage across (aava) system RU2215336C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26167994A 1994-06-17 1994-06-17
US261,679 1994-06-17

Publications (2)

Publication Number Publication Date
RU97100939A true RU97100939A (en) 1999-02-10
RU2215336C2 RU2215336C2 (en) 2003-10-27

Family

ID=22994377

Family Applications (1)

Application Number Title Priority Date Filing Date
RU97100939/09A RU2215336C2 (en) 1994-06-17 1995-05-30 Video system with power supply for screen grid responding to system automatic adyustment of kinescope voltage across (aava) system

Country Status (12)

Country Link
US (1) US5894327A (en)
EP (1) EP0769235B1 (en)
JP (1) JP3955318B2 (en)
KR (1) KR100401399B1 (en)
CN (1) CN1130923C (en)
CA (1) CA2191554C (en)
DE (1) DE69511700T2 (en)
ES (1) ES2138213T3 (en)
MX (1) MX9606439A (en)
MY (1) MY112289A (en)
RU (1) RU2215336C2 (en)
WO (1) WO1995035629A1 (en)

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US6897901B2 (en) * 2001-03-14 2005-05-24 Koninklijke Philips Electronics N.V. Circuit for combining AKB and selective beam current limiting and projection television system utilizing same
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US6573669B1 (en) * 2001-10-09 2003-06-03 National Semiconductor Corporation Cathode ray tube driver circuit with frequency compensation without providing a leakage path for cathode current
KR100421016B1 (en) * 2001-10-13 2004-03-04 삼성전자주식회사 Apparatus and method for controlling a black stretch of video signal
RU2220514C2 (en) * 2002-01-25 2003-12-27 Андрейко Александр Иванович Method for interactive television using central vision properties of eyes of individual users or groups thereof that protects information against unauthorized access, distribution, and use
US20040080617A1 (en) * 2002-10-28 2004-04-29 Koninlijke Philips Electroics N.V. Method and apparatus to improve picture aesthetics during switch-on
KR20050080319A (en) * 2004-02-09 2005-08-12 삼성전자주식회사 The bias circuit for preventing the distortion of color in crt

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