KR810001951Y1 - Power source circuit of braun tube - Google Patents

Power source circuit of braun tube Download PDF

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Publication number
KR810001951Y1
KR810001951Y1 KR2019800007561U KR800007561U KR810001951Y1 KR 810001951 Y1 KR810001951 Y1 KR 810001951Y1 KR 2019800007561 U KR2019800007561 U KR 2019800007561U KR 800007561 U KR800007561 U KR 800007561U KR 810001951 Y1 KR810001951 Y1 KR 810001951Y1
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KR
South Korea
Prior art keywords
transistor
heater
crt
power supply
voltage
Prior art date
Application number
KR2019800007561U
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Korean (ko)
Inventor
박찬웅
Original Assignee
주식회사금성사
허신구
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Priority to KR2019800007561U priority Critical patent/KR810001951Y1/en
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Publication of KR810001951Y1 publication Critical patent/KR810001951Y1/en

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/22—Heaters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information
    • H04N5/68—Circuit details for cathode-ray display tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/28—Heaters for thermionic cathodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K2005/00013—Delay, i.e. output pulse is delayed after input pulse and pulse length of output pulse is dependent on pulse length of input pulse

Abstract

내용 없음.No content.

Description

텔레비젼 브라운관 히타의 전력 공급회로TV CRT Heater Power Supply Circuit

첨부도면은 본 고안의 회로도.The accompanying drawings are circuit diagrams of the present invention.

본 고안은 텔레비젼 브라운관의 히타에 예열을 가하여 전원투입 후 순간적으로 텔레비젼 브라운관의 화면에 영상이 나타날 수 있도록 한 텔레비젼 브라운관의 히타 전력 공급회로에 관한 것으로, 정류전원과 B+전원의 두 개의 전원을 사용하여 정류전원으로 예열하고 B+전원으로는 안정된 브라운관의 정격전압을 인가하여 텔레비젼 브라운관의 수명을 연장시킨 것이다.The present invention relates to a heater power supply circuit of a television CRT that preheats the heater of a TV CRT so that an image can appear on the screen of the TV CRT immediately after power is turned on. It is preheated with rectified power supply and the rated voltage of CRT tube is applied to B + power source to extend the life of TV CRT tube.

종래의 브라운관의 히타에는 예열시간이 필요하며 전원투입 후 수초의 시간이 경과하여야만 텔레비젼의 화면에 영상이 나타났으며 최근에 이르러 짧은 시간내에 화면이 나올 수 있는 히타전령 공급회로(실용신안 공번 80-1117호)가 소개되는 실정이었으나 예열 후에 플라이백트랜스 2차측의 펄스전압에 따라 브라운관의 히타를 열화시키어 브라운관 수명감퇴의 원인이 되었다.The heater of the conventional CRT requires a preheating time, and a few seconds after the power is turned on, the image appears on the screen of the TV. 1117) was introduced, but after preheating, the heater of the CRT deteriorated due to the pulse voltage on the secondary side of the flyback transformer.

본 고안은 상기와 같이 예열 후 과대한 펄프전압이 브라운관 히타에 공급되지 알고 B+ 전압으로 브라운관 히타에 정격전압을 인가하여 전원투입 후 즉시 화면에 영상을 나타낼 수 있으며 브라운관의 수명을 연장시킨 것으로 이를 첨부도면에 의하여 상술하면 다음과 같다.The present invention can not display excessive pulp voltage to CRT heater after preheating as above and apply rated voltage to CRT heater with B + voltage so that the image can be displayed on screen immediately after the power is supplied. When described in detail with the drawings as follows.

정류전원(VC1), B+전원(VC2)이 각각의 단자(1)(2)에 공급되도록 연결하고 저항(R1)과 콘덴서(C1)로 구성된 지연회로(3)의 콘덴서(C1)에 정류전원(VC1)이 충전되게 연결하여 전원이 투입된 순간에 트랜지스터(TR1)은 ＂오프＂(OFF)상태와 트랜지스터(TR2)은 ＂온＂(ON)상태가 되도록 PNP트랜지스터(TR1,TR2)를 접속하여 콘덴서(C1)가 충전완료 되었을 때, 트랜지스터(TR1)는 ＂턴온＂(TURN ON)되고, 트랜지스터(TR2)는 ＂턴 오프＂(TURN OFF)되도록 접속하고 트랜지스터(TR2)의 콜텍터에 히터전류 제어용 보호저장(R5)을 통하여 브라운관 히타(RH)에 연결 접속되어 히터 전류제어용 보호저장(R5)과 브라운관 히타(RH) 사이에 다이오드(D1)를 연결하여 트랜지스터(TR2)가 ＂턴오프＂되었을 때, 다이오드(D1)를 통하여 B+전원 (VC2)가 공급되도록 연결 접속한다.The capacitor C of the delay circuit 3 connected to the rectifier power source VC 1 and the B + power source VC 2 to be supplied to the respective terminals 1 and 2 and composed of a resistor R 1 and a capacitor C 1 . 1 ) The rectifier power supply VC 1 is connected to the PNP transistor so that the transistor TR 1 is turned off and the transistor TR 2 is turned on at the moment the power is turned on. When the capacitor C 1 is charged by connecting (TR 1 , TR 2 ), the transistor TR 1 is turned ON and the transistor TR 2 is turned OFF. Connected to the heater of the heater current control (R 5 ) and connected to the tube heater of the transistor (TR 2 ) via the heater current control protection storage (R 5 ) and connected between the heater current control protection (R 5 ) and the cathode heater (RH) diode. , the B + power connection connected to (VC 2) is supplied via a diode (D 1) when (D 1) is connected to a transistor (TR 2) is "off".

미설명된 저항(R2)은 트랜지스터(TR1)의 부저항이고, 저항(R3,R4)은 트랜지스터(TR2)의 바이어스 저항이다.Unexplained resistor R 2 is a negative resistance of transistor TR 1 , and resistors R 3 and R 4 are bias resistors of transistor TR 2 .

이와 같이 구성된 본 고안은 텔레비젼에 전원이 공급되면 2개의 전원인 정류전원(VC1), B+전원(VC2)이 각각 단자(1,2)에 공급된다((VC1은 VC2보다 높은 전압이며 VC2는 브라운관 히타의 정격 전압과 같은 전압이다.)According to the present invention configured as described above, when the television is supplied with power, two rectifier power sources VC 1 and B + power source VC 2 are supplied to the terminals 1 and 2 , respectively ((VC 1 is higher than VC 2 ). VC 2 is the same voltage as that of CRT heater.)

이와 같이 구성된 본 고안은 텔레비젼에 전원이 공급되면 2개의 전원인 정류전원(VC1), B+전원(VC2)이 각각 단자(1,2)에 공급된다.((VC1은 VC2보다 높은 전압이며 VC2는 브라운관 히타의 정격전압과 같은 전압이다.)According to the present invention configured as described above, when the television is supplied with power, two rectifier power sources VC 1 and B + power source VC 2 are supplied to the terminals 1 and 2 , respectively ((VC 1 is higher than VC 2 ). Voltage and VC 2 is the same voltage as that of CRT heater.)

이 때 저항 (R1)과 콘덴서(C1)로 구성된 지연회로(3)의 콘덴서(C1)에 충전되는 순간동안 트랜지스터(TR1)은 ＂오프＂(OFF)되고, 따라서 트랜지스터(TR1)의 콜렉터의 전압은 높은 전압을 유지하여 저항(R3,R4)에 의하여 분압된 전원이 트랜지스터(TR2)의 베이스-에미터 간에 바이어스 전압이 공급되어 트랜지스터(TR2)는 도통되고 결국 정류전원(VC1)은 트랜지스터(TR2)와 보호저항(R5)을 통하여 브라우관히타(RH)에 공급되어 예열이 이루어지는 것이다.At this time, the transistor TR 1 is turned OFF during the moment of being charged in the capacitor C 1 of the delay circuit 3 composed of the resistor R 1 and the capacitor C 1 , and thus the transistor TR 1. ) voltage of the collector to the base of the power transistor (TR 2) divided by the resistance (R 3, R 4) to maintain the high voltage-biased voltage is applied between the emitter transistor (TR 2) is conductive, and eventually The rectified power supply VC 1 is supplied to the BRT through the transistor TR 2 and the protection resistor R5 to preheat.

이때 브라운관 히타(RH)에 인가된 전압은 브라운관 히타(RH)의 정격전압(VC2)보다 높게 되어, 다이오드(D1)에서 불통되고, B+전원(VC)은 차단되므로 안정된 예열전압을 브라운관히타(RH)에 공급할 수 있는 것이다.At this time, the voltage applied to the CRT (RH) is higher than the rated voltage (VC 2 ) of the CRT (RH), the diode D 1 is turned off, and the B + power supply (VC) is cut off, so that the CRT is stable. It can be supplied to (RH).

전원투입 후 지연회로(3)의 콘덴서(C1)가 충전되면 (1초미만)이 충전된 전압이 트랜지스터(TR1)의 베이스-에미터간에 바이어스 전압을 공급하여 트랜지스터(TR1)은 도통되고 콜렉터의 전압은 정류전압(VC1)까지 상승하여 트랜지스터(TR2)의 베이스-에미터간에 바이어스 전압이 걸리지 않아 트랜지스터(TR2)은 불통이다When the capacitor C 1 of the delay circuit 3 is charged after the power is turned on, the voltage charged (less than 1 second ) supplies a bias voltage between the base and emitter of the transistor TR 1 so that the transistor TR 1 is turned on. And the collector voltage rises up to the rectified voltage VC 1 , so that the bias voltage is not applied between the base and emitter of the transistor TR 2 , and the transistor TR 2 is unstable.

따라서 정류전원(VC1)은 차단되고, 단자(2)에 공급된 B+전원(VC2)은 다이오드(D1)를 통하여 브라운관 히타에 정격전압이 공급되는 것이다.Therefore, the rectified power supply VC 1 is cut off, and the B + power supply VC 2 supplied to the terminal 2 is supplied with the rated voltage to the CRT heater through the diode D 1 .

이상에서와 같이 본 고안은 간단한 부품 소자에 정류전원과 B+전원을 사용하여 정류정원(VC1)으로 트랜지스터(TR2)를 도통시켜 브라운히타(RH)에 순간적인 높은 전압이 예열되고 지연회로를 통한 충전전압이 트랜지스터(TR2)를 불통시키어 정류전원을 차단시키고, 브라운관 히타(RH)의 정격전압을 다이오드(D1)를 통하여 B+전원(VC2)에서 공급되므로서 종래에 과대한 펄스 전압이 브라운관 히타에 공급되어 히타의 열화로 발생되는 브라운 관의 수명 감퇴를 완전히 해결한 텔레비젼 브라운관의 히타 전력 공급회로인 것이다.As described above, the present invention uses a rectifier power supply and a B + power supply to conduct a transistor TR 2 to the rectification power supply VC 1 by using a simple component element to preheat a momentary high voltage to the brown heater RH, and The charging voltage through the transistor TR 2 turns off the rectified power supply, and the rated voltage of the cathode ray heater RH is supplied from the B + power supply VC 2 through the diode D 1 , thereby causing an excessive pulse voltage. It is the heater power supply circuit of the TV tube which was supplied to this tube tube heater and completely solved the lifespan deterioration of the tube produced by the deterioration of the heater.

Claims (1)

도면에 표시된 바와 같이 지연회로를 구성하여 예열시키는 브라운관의 히타전력공급회로에 있어서 공지한 지연회로(3)와 브라운관히타(RH) 사이에 트랜지스터(TR1)와 상반동작을 하게 바이어스 저항(R3,R4)을 통하여 트랜지스터(TR2)를 연결하고, 트랜지스터(TR2)의 에미터에는 단자(1)의 정류정원(VC1)이 인가되게 하고 콜렉터에는 보호저항(R5)과 다이오드(D1)가 연결되고 단자(2)의 전원(VC2)이 인가됨을 특징으로 하는 텔레비젼 브라운관의 히타전력공급회로.To a delay circuit 3 and the opposite motion and CRT heater transistor (TR 1) between the (RH) known in the CRT heater power supply circuit of that configuration to preheat the delay circuit as shown in the drawings the bias resistor (R 3 , through R 4) connected to a transistor (TR 2), and the emitter is rectified garden (VC 1) is presented, and a collector, the protection resistor is (R 5) and diode in the terminal (1) of the transistor (TR 2) ( Heater power supply circuit of a television CRT, characterized in that D 1 ) is connected and the power supply VC 2 of the terminal 2 is applied.
KR2019800007561U 1980-11-25 1980-11-25 Power source circuit of braun tube KR810001951Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019800007561U KR810001951Y1 (en) 1980-11-25 1980-11-25 Power source circuit of braun tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019800007561U KR810001951Y1 (en) 1980-11-25 1980-11-25 Power source circuit of braun tube

Publications (1)

Publication Number Publication Date
KR810001951Y1 true KR810001951Y1 (en) 1981-10-27

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ID=19219558

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019800007561U KR810001951Y1 (en) 1980-11-25 1980-11-25 Power source circuit of braun tube

Country Status (1)

Country Link
KR (1) KR810001951Y1 (en)

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