KR900010299Y1 - High voltage output stabilization circuit for color c.r.t. - Google Patents

High voltage output stabilization circuit for color c.r.t. Download PDF

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KR900010299Y1
KR900010299Y1 KR2019870016225U KR870016225U KR900010299Y1 KR 900010299 Y1 KR900010299 Y1 KR 900010299Y1 KR 2019870016225 U KR2019870016225 U KR 2019870016225U KR 870016225 U KR870016225 U KR 870016225U KR 900010299 Y1 KR900010299 Y1 KR 900010299Y1
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high voltage
circuit
transistor
voltage
voltage output
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KR2019870016225U
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KR890007873U (en
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김원기
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삼성전자 주식회사
안시환
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
    • H04N3/185—Maintaining dc voltage constant
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/28—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using colour tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes

Abstract

내용 없음.No content.

Description

고품위 컬러 CRT용 고압출력 안정화회로High voltage output stabilization circuit for high quality color CRT

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

가 : 고압출력회로 나 : 고압안정화회로A: High voltage output circuit B: High pressure stabilization circuit

다 : 고압증폭회로 라 : 고압정류회로C) high voltage amplifier circuit d) high voltage rectifier circuit

R1~R26: 저항 C1~C9: 콘덴서R 1 to R 26 : Resistor C 1 to C 9 : Condenser

TR1~TR7: 트랜지스터 T1~T4: 트랜스TR 1 to TR 7 : Transistors T 1 to T 4 : Trans

VR1: 가변저항 D1~D5: 다이오드VR 1 : Variable resistor D 1 ~ D 5 : Diode

L1: 코일L 1 : coil

본 고안은 고품위 컬러브라운관 애노드에 고압을 발생시키는 회로로써 고해상도 모니터에서와 같은 대용량의 안정된 고압을 출력하기 위한 고품위 컬러 CRT용 고압출력 안정화회로에 관한 것이다.The present invention relates to a high-voltage output stabilization circuit for a high-quality color CRT for outputting a high-capacity and stable high-voltage as a high-resolution monitor as a circuit for generating high-pressure on a high-quality color CRT anode.

종래의 고압출력회로는 고압출력 트랜지스터 및 트랜스를 각각 하나씩만을 사용하였으므로 대용량의 고압을 공급하기에는 부적합했고 고압안정화회로의 경우도 가변티액턴스 방식을 사용하여 플라이백트랜스의 일차측으로 공급되는 전원과 직렬로 가포화 리액터를 플라이백트랜스와 직렬이나 병렬로 연결하여 화면의 밝기에 따라 가포화리액터의 일차측 전류가 변하는데 따라서 2차측 인덕턴스가 변화하여 전체 고압출력회로의 인덕턴스값이 변화하여 펄스의 진폭이 가변됨으로써 고압을 고정하는 방식인데 이 방식은 고품위 화질이 우선되는 안정화 회로에서 사용하면 화질의 열화를 초래하므로 고품위를 요하는 고해상도 컬러모니터나 TV에서는 적용될 수 없는 결함이 있었다.In the conventional high voltage output circuit, only one high voltage output transistor and one transformer are used. Therefore, the high voltage output circuit is not suitable for supplying a large amount of high voltage, and the high voltage stabilization circuit also uses a variable thiactance method in series with the power supplied to the primary side of the flyback transformer. By connecting the saturable reactor in series or in parallel with the flyback transformer, the primary side current of the saturable reactor changes according to the brightness of the screen.The secondary side inductance changes and the inductance value of the entire high voltage output circuit changes, resulting in a pulse amplitude. It is a method of fixing high voltage by changing it, and this method causes a deterioration of image quality when used in a stabilization circuit in which high quality image is prioritized, so there is a defect that cannot be applied in a high resolution color monitor or TV requiring high quality.

본 고안은 상기와 같은 결함을 해결하고자 안출한 것인바, 대용량의 고압발생을 위해서 고압드라이브트랜스에서 2개의 출력이 나오도록 했으며 고압출력 트랜지스터 및 트랜스도 각각 2개씩 이용하여 충분한 용량의 고압을 발생할 수 있도록 했고 정밀도가 높은 안정된 고압을 발생하기 위하여 고압출력트랜스의 2차측에서 화면밝기에 따른 고압변동분을 검출하여 이것을 고압드라이브트랜지스터와 고압출력 트랜지스터의 공급직류전압을 제어하여 고압의 안정화를 이룩함으로써 고품위를 요하는 고해상도 컬러 모니터나에서 밝고 선명한 화질을 얻어 제품의 신뢰도를 향상시킨 회로로 이하 첨부된 도면에 의하여 본 고안을 상세히 설명하면 다음과 같다.The present invention was devised to solve the above-mentioned defects, and two outputs were generated from the high voltage drive transformer for generating a high voltage of a large capacity, and two high voltage output transistors and two transformers could be used to generate a high voltage having sufficient capacity. In order to generate stable high voltage with high precision, high voltage variation is detected on the secondary side of the high voltage output transformer according to the brightness of the screen and this is controlled by supply voltage of high voltage drive transistor and high voltage output transistor to achieve high quality stabilization. The present invention will be described in detail with reference to the accompanying drawings as a circuit which improves the reliability of the product by obtaining a bright and clear picture quality in a high resolution color monitor or the like as follows.

수평발진기(Hosc) 입력단은 저항(R1)(R2)과 고압드라이브트랜지스터(TR1) 콘덴서(C1)(C2)를 통하여 고압드라이브 트랜스(T1)의 2차측은 스위칭 다이오드(D1)(D2)와 저항(R3~R6)을 통하여 고압출력 트랜지스터(TR2)(TR3)에 연결하며 상기 트랜지스터(TR2)(TR3)의 에미터단자에 트랜스(T2)의 일차측과 이차측을 각각 연결하고 상기 트랜지스터(TR2)(TR3)의 콜렉터단자에는 콘덴서(C3)와 다이오드(D3) 저항(R9)을 통하여 고압출력트랜스(T3)(T4)의 일차측에 연결하여 고압출력회로(가)를 구성하고, 상기 고압출력회로(가)에 연결된 고압안정화회로(나)는 전원(B+)에 저항(R21~R26)과 콘덴서(C8)(C9) 코일(L1) 고압제어드라이브트랜지스터(TR4~TR6)를 연결하여 구성하며, 상기 고압안정화회로(나)에 연결된 고압증폭회로(다)는 저항(R14~R20)과 콘덴서(C6)(C7) 고압 오차증폭 트랜지스터(TR7) 가변저항(VR1)을 연결하여 구성하고 상기 고압출력회로(가)의 출력트랜스(T3)(T4) 이차측에 접속하고 상기 트랜스(T3)(T4) 이차측에 스위칭다이오드(D4)(D5)와 저항(R3)(R4) 콘덴서(C5)를 연결하여 RGB(Red Green Blue) 각각의 CRT 애노드에 고압을 공급하도록 고압정류회로(라)를 연결 구성한 회로로 이하 본 고안을 설명한다.The input side of the horizontal oscillator (Hosc) is the switching diode (D) of the secondary side of the high voltage drive transformer (T 1 ) through the resistor (R 1 ) (R 2 ) and the high voltage drive transistor (TR 1 ) condenser (C 1 ) (C 2 ). 1 ) It is connected to the high voltage output transistors TR 2 and TR 3 through D 2 and resistors R 3 to R 6 , and the transformer T 2 is connected to the emitter terminal of the transistors TR 2 and TR 3 . ) Is connected to the primary side and the secondary side, respectively, and the collector terminal of the transistor TR 2 (TR 3 ) is connected to the high voltage output transformer T 3 through the capacitor C 3 and the diode D 3 resistor R 9 . The high voltage output circuit (A) is connected to the primary side of (T 4 ), and the high voltage stabilization circuit (B) connected to the high voltage output circuit (A) is a resistor (R 21 to R 26 ) to the power source (B + ). And a condenser (C 8 ) (C 9 ) coil (L 1 ) and a high-voltage control drive transistor (TR 4 ~ TR 6 ) is connected, and the high-voltage amplification circuit (C) connected to the high-voltage stabilization circuit (b) is a resistor R 14 ~ R 20) and the condenser (C 6) (C 7), a high pressure error amplifier transistor (TR 7) configured by connecting a variable resistor (VR 1) and connected to the output transformer (T 3) (T 4), the secondary side of the high-voltage output circuit (a) and CRT of RGB (Red Green Blue) by connecting a switching diode (D 4 ) (D 5 ) and a resistor (R 3 ) (R 4 ) capacitor (C 5 ) to the secondary of the transformer (T 3 ) (T 4 ) The present invention will be described below as a circuit in which a high-voltage rectifier circuit (D) is connected and configured to supply high pressure to the anode.

수평발진기(Hosc)로 부터 신호가 입력되면 저항(R1)을 통하여 고압드라이브트랜지스터(TR1)를 구동시켜 콘덴서(C1)(C2)에 전류를 충전시키고 고압드라이브트랜스(T1)의 일차측 코일에 전압이 유기되고, 상기 트랜스(T1)의 이차측 코일에서 2개의 드라이브 파형이 출력되어 고속 스위칭 다이오드(D1)(D2)를 거쳐 고압출력트랜지스터(TR2)(TR3)구동시키며, 이때 상기 트랜지스터(TR2)(TR3)에미터에 연결된 트랜스(T2)와 저항(R7)(R8)을 이용하여 어떤 불균형상태의 발생에 대해 상기 트랜지스터(TR2)(TR3)가 파괴되는 것을 방지하도록 구성하였고 상기 트랜지스터(T2)(TR3)가 구동함으로써 고압 출력 트랜스(T3)(T4)의 일차측 코일에 전압이 유기되며 이차측 코일에 고압이 출력되어 고압정류회로(라)의 고속스위칭다이오드(D4)(D5)를 통하여 RGB CRT 애노드에 고압이 인가되어 화면이 밝아진다.When a signal is input from the horizontal oscillator (Hosc), the high voltage drive transistor (TR 1 ) is driven through the resistor (R 1 ) to charge a current in the capacitor (C 1 ) (C 2 ) and the high voltage drive transformer (T 1 ). the voltage at is induced in the primary coil, the transformer is two drive waveform output from the secondary side coil of the (T 1) high-speed switching diode (D 1) the high-voltage output transistor (TR 2) through (D 2) (TR 3 ) sikimyeo drive, in which the transistor (TR 2) (TR 3) trans (T 2) and the resistor connected to the emitter (R 7) (a transistor for which the occurrence of imbalance by using the R 8) (TR 2) (TR 3 ) is configured to prevent destruction and the transistor (T 2 ) (TR 3 ) is driven to induce voltage at the primary coil of the high voltage output transformer (T 3 ) (T 4 ) and at high voltage to the secondary coil. is output through the high-speed switching diode (d 4) (d 5) of the high-voltage rectification circuit (d) RGB CRT It is applied to the high voltage on the node display light up.

이때 상기 CRT에 애노드전류가 증가하면 고압이 저하되어 고압증폭회로(다)의 트랜지스터(TR7)의 베이스 전압이 낮아져 순바이어스가 감소됨으로써 고압 안전화회로(나)의 저항(R25)에 생기는 전압강하가 감소되고, 따라서 고압제어드라이브트랜지스터(TR5)의 베이스 전압이 상승하여 바이어스가 증가하므로 상기 트랜지스터(TR5)는 도통되고, 도통전류는 고압드라이브트랜지스터(TR4)의 베이스에 인가되어 상기 트랜지스터(TR4)도 도통하게 되어 콜렉터와 에미터간에 동작저항이 감소되어 고압출력회로(가)의 고압드라이브트랜지스터(TR1)와 고압출력트랜지스터(TR2)(TR3)의 공급직류전압이 높아져 고압펄스의 진폭이 증가하므로 고압의 저하를 방지하게 된다.At this time, when the anode current increases in the CRT, the high voltage is lowered, the base voltage of the transistor TR 7 of the high voltage amplification circuit (C) is lowered, and the net bias is reduced, so that the voltage generated in the resistance (R 25 ) of the high voltage safety circuit (B). drop is reduced, and thus it is biased by the base voltage is increased in the high-voltage control driver transistor (TR 5) increases and is conductive the transistor (TR 5), the conduction current is above are applied to the base of high voltage drive transistor (TR 4) Transistor TR 4 also conducts, reducing the operating resistance between the collector and the emitter, so that the supply DC voltages of the high voltage drive transistor TR 1 and the high voltage output transistor TR 2 and TR 3 of the high voltage output circuit As the amplitude of the high pressure pulse increases, the high pressure is prevented from being lowered.

한편 고압안정화회로(나)의 고압제어보호트랜지스터(TR6)는 고압출력회로(가)가 고정나서 전원(B+)회로의 절연 저항이 극히 적어졌을 경우 상기 고압제어 트랜지스터(TR4)에 관대전류가 흘러 상기 트랜지스터(TR4)가 파괴되는 것을 방지하기 위한 것이다.On the other hand, the high voltage control protection transistor TR 6 of the high voltage stabilization circuit (b) is tolerant to the high voltage control transistor (TR 4 ) when the insulation resistance of the power supply (B + ) circuit is extremely low because the high voltage output circuit (a) is fixed. The current flows to prevent the transistor TR 4 from being destroyed.

또한 상기 고압출력회로(가)의 출력고압에 오차가 생겼을때 상기 고압증폭회로(다)의 전원(B1 +)에서 분압회로(R17)(VR1)에 전류가 흘러 고압오차 트랜지스터(TR7)의 베이스에 인가되어 상기 트랜지스터(TR7)가 동작함으로써 고압정류의 부하가 변동하여 고압출력트랜스(T3)(T4)의 저전위측에 접속된 저항(R14)(R16)에 흐르는 CRT의 애노드전류가 변화하는 것을 방지시켜 준다.In addition, when an error occurs in the output high voltage of the high voltage output circuit (a), a current flows from the power supply B 1 + of the high voltage amplification circuit (C) to the voltage dividing circuit (R 17 ) (VR 1 ) and the high voltage error transistor (TR). 7 ) is applied to the base of the transistor (TR 7 ) to operate the voltage of the high voltage rectification is changed to the resistor (R 14 ) (R 16 ) connected to the low potential side of the high voltage output transformer (T 3 ) (T 4 ). This prevents the anode current of the CRT flowing through it from changing.

상기한 바와같이 대용량의 고압발생을 위해서 고압드라이브 트랜스에서 두개의 출력이 나오도록 했으며 고압출력 트랜지스터 및 트랜스도 각각 두개씩 이용하여 충분한 용량의 고압을 발생할 수 있도록 했고 정밀도가 높은 안정된 고압을 발생시키기 위하여 고압출력트랜스의 이차측에서 화면밝기에 따른 고압변동분을 검출하여 고압드라이브 트랜지스터와 고압출력트랜지스터의 공급직류전압을 제어하여 고압의 안정화를 얻을 수 있는 효과가 있는 것이다.As described above, two outputs are generated from the high voltage drive transformer for generating a large voltage, and two high voltage output transistors and two transformers are used to generate a high voltage of sufficient capacity and to generate a stable high voltage with high precision. The secondary side of the output transformer detects the high voltage variation according to the brightness of the screen and controls the supply DC voltage of the high voltage drive transistor and the high voltage output transistor to obtain the stabilization of the high voltage.

Claims (1)

수평발진단자(Hosc)는 고압드라이브트랜지스터(TR1)를 통하여 고압드라이브트랜스(T1)의 일차측에 연결하고 상기 트랜스(T1)의 이차측은 다이오드(D1)(D2)를 통하여 고압출력트랜지스터(TR2)(TR3)와 트랜스(T2)를 통해 고압출력트랜스(T3)(T4)를 연결하여 고압출력회로(가)를 구성하고 대용량의 고압발생을 위해서 트랜스(T3)(T4)에서 두개의 출력이 나오도록 구성한 회로와, 고압정류회로(라)는 다이오드(D4)(D5)를 통하여 RGB CRT의 애노드측에 고압을 인가하여 화면이 출력되도록 구성한 회로와, 상기 화면밝기에 따른 고압변동을 검출하기 위하여 트랜지스터(TR4~TR6)와 저항(R21~R26)을 연결하여 고압안정화회로(나)를 구성하고 고압드라이브 트랜지스터와 고압출력트랜지스터의 공급전압을 안정화시킨 회로와, 상기고압정류회로(라)의 고압정류 부하가 변동하여 고압출력트랜스(T3)(T4)에 오차가 생겼을때 고압증폭회로(다)는 저항(R14~R20)과 트랜지스터(TR7) 가변저항(VR1)으로 구성하여 상기 고압출력트랜스(T3)(T4)의 저전위측에 접속된 저항(R14~R16)에 흐르는 CRT의 애노드전류가 변화하는 것을 방지시켜 오차를 제거해 주는 회로로 구성된 것을 특징으로 하는 고품위 컬러 CRT용 고압출력 안정화회로.The horizontal oscillation terminal Hosc is connected to the primary side of the high voltage drive transistor T 1 through the high voltage drive transistor TR 1 and the secondary side of the transformer T 1 is connected to the high voltage through the diode D 1 D 2 . The high-voltage output circuit (T 3 ) (T 4 ) is connected to the output transistor (TR 2 ) (TR 3 ) and the transformer (T 2 ) to form a high-voltage output circuit (A), and for the generation of high-voltage high-capacity 3 ) (T 4 ) is configured to output two outputs, and the high-voltage rectifier circuit (D) is configured to apply high voltage to the anode side of RGB CRT through diode (D 4 ) (D 5 ) A high voltage stabilization circuit (B) is formed by connecting a transistor (TR 4 to TR 6 ) and a resistor (R 21 to R 26 ) to detect a high voltage variation according to the screen brightness and the high voltage drive transistor and the high voltage output transistor. A circuit in which the supply voltage is stabilized and the high voltage regulator of the high voltage rectifying circuit When the current load fluctuates and an error occurs in the high voltage output transformer (T 3 ) (T 4 ), the high voltage amplifier circuit (C) consists of a resistor (R 14 to R 20 ) and a transistor (TR 7 ) and a variable resistor (VR 1 ). To prevent an error in the anode current of the CRT flowing through the resistors R 14 to R 16 connected to the low potential side of the high voltage output transformer T 3 and T 4 . High voltage output stabilization circuit for high quality color CRT.
KR2019870016225U 1987-09-24 1987-09-24 High voltage output stabilization circuit for color c.r.t. KR900010299Y1 (en)

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KR2019870016225U KR900010299Y1 (en) 1987-09-24 1987-09-24 High voltage output stabilization circuit for color c.r.t.

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Application Number Priority Date Filing Date Title
KR2019870016225U KR900010299Y1 (en) 1987-09-24 1987-09-24 High voltage output stabilization circuit for color c.r.t.

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KR890007873U KR890007873U (en) 1989-05-17
KR900010299Y1 true KR900010299Y1 (en) 1990-11-08

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