JPS63236474A - High voltage circuit - Google Patents
High voltage circuitInfo
- Publication number
- JPS63236474A JPS63236474A JP6885187A JP6885187A JPS63236474A JP S63236474 A JPS63236474 A JP S63236474A JP 6885187 A JP6885187 A JP 6885187A JP 6885187 A JP6885187 A JP 6885187A JP S63236474 A JPS63236474 A JP S63236474A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- high voltage
- distortion correcting
- addition
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 description 6
- 238000011105 stabilization Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 241000226585 Antennaria plantaginifolia Species 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、テレビジョン等の高圧回路に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to high voltage circuits for televisions and the like.
従来、テレビジョン等の高圧回路として、低価格化、省
電力化を目的として高圧発生回路と水平偏向回路とを共
用し、高圧安定化回路として、帰線期間を制御する回路
が知られている。（特開昭５９−４４１７７号、特開昭
５９−１０４８６４号）。Conventionally, circuits have been known for high-voltage circuits such as televisions that share a high-voltage generation circuit and a horizontal deflection circuit for the purpose of lowering costs and saving power, and as high-voltage stabilizing circuits that control the retrace period. . (JP-A-59-44177, JP-A-59-104864).
上記従来技術は、左右糸巻歪補正を水平偏向回路の電源
電圧を変調する方式で行った場合について配慮がされそ
おらず、高圧安定化制御と歪補正制御を独立に動作させ
ることができないという問題があった。The above conventional technology does not take into consideration the case where left and right pincushion distortion correction is performed by modulating the power supply voltage of the horizontal deflection circuit, and the problem is that high voltage stabilization control and distortion correction control cannot be operated independently. was there.
本発明の目的は上記従来技術の欠点を除去し、歪補正制
御と高圧安定化制御を独立に動作させることができる高
圧回路を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a high voltage circuit that can operate distortion correction control and high voltage stabilization control independently.
上記目的は、フライバックトランスの２次側の低圧側端
子に加算電圧源を設け、この加算電圧源を高圧検出信号
と歪補正信号で制御することにより、達成される。The above object is achieved by providing an addition voltage source at the low voltage side terminal on the secondary side of the flyback transformer and controlling this addition voltage source with a high voltage detection signal and a distortion correction signal.
フライバックトランスの２次側の低圧側端子に設けた加
算電圧源は、まず高圧検出信号によって高圧が低下すれ
ば加算電圧源の出力電圧が上昇する様に制御され高圧安
定化の動作を行う、また、歪補正信号によって加算電圧
源の出力電圧を変調し、歪補正のための電源電圧変調に
よる高圧出力電圧の変調を２次側で相殺する動作を行う
。The addition voltage source provided at the low voltage side terminal on the secondary side of the flyback transformer is first controlled by the high voltage detection signal so that when the high voltage decreases, the output voltage of the addition voltage source increases, and performs a high voltage stabilization operation. Further, the output voltage of the addition voltage source is modulated by the distortion correction signal, and the modulation of the high voltage output voltage due to the power supply voltage modulation for distortion correction is canceled on the secondary side.
以上により、電源電圧変調による歪補正制御と高圧安定
化制御を独立に動作させる。ことができる〔実施例〕
以下、本発明の一実施例を第１図により説明する。As described above, distortion correction control and high voltage stabilization control using power supply voltage modulation are operated independently. [Example] An example of the present invention will be described below with reference to FIG.
第１図において、１はスイッチングパルス入力端子、２
は水平偏向出力トランジスタ、３はダンパーダイオード
、４は共振コンデンサ、５は水平偏向コイル、６はフラ
イバックトランス、７は高圧整流ダイオード、８は高圧
出力端子、９．１０は高圧分割抵抗器、１１は結合コン
デンサ、１２は加算電圧源制御回路、１３は加算電圧源
、１４は基準雪圧源、１５．１６はコンデンサ、１７は
電源変調回路、１８は増幅回路、１９は電源入力端子、
２０は歪補正信号入力端子である。In Figure 1, 1 is a switching pulse input terminal, 2 is a switching pulse input terminal, and 2 is a switching pulse input terminal.
is a horizontal deflection output transistor, 3 is a damper diode, 4 is a resonant capacitor, 5 is a horizontal deflection coil, 6 is a flyback transformer, 7 is a high voltage rectifier diode, 8 is a high voltage output terminal, 9.10 is a high voltage dividing resistor, 11 12 is a coupling capacitor, 12 is an addition voltage source control circuit, 13 is an addition voltage source, 14 is a reference snow pressure source, 15.16 is a capacitor, 17 is a power modulation circuit, 18 is an amplifier circuit, 19 is a power input terminal,
20 is a distortion correction signal input terminal.
次に図を用いて動作を説明する。Next, the operation will be explained using figures.
スイッチングパルス入力端子１にスイッチングパルス（
通常は水平同期パルス）が入力されると、水平偏向出力
トランジスタ２はスイッチング動作し、水平偏向コイル
５及びフライバックトランス６の１次側にのこぎり波電
流が流れ、２次側に高電圧が誘起されろ、整流ダイオー
ド１によりこの高電圧を整流し、高圧出力端子８に直流
高電圧が出力される。高圧出力端子８に出力される直流
高電圧は、抵抗器９１０により分割され、加算電圧源制
御回路１２の一方の入力として加えられる。加算電圧源
制御回路１２のもう一方の入力として、基算電圧源１４
からの基準電圧が加えられ、加算電圧源制御回路１２は
その２つの入力雷、圧が等しくなる様に加算電圧源１３
を制御し、高圧出力端子８から出力される直流高電圧を
一定に安定化させている。Switching pulse (
When a horizontal synchronization pulse (usually a horizontal synchronization pulse) is input, the horizontal deflection output transistor 2 performs a switching operation, causing a sawtooth current to flow through the primary side of the horizontal deflection coil 5 and flyback transformer 6, and a high voltage is induced on the secondary side. Then, this high voltage is rectified by the rectifier diode 1, and a DC high voltage is outputted to the high voltage output terminal 8. The DC high voltage output to the high voltage output terminal 8 is divided by a resistor 910 and applied as one input to the addition voltage source control circuit 12 . As the other input of the addition voltage source control circuit 12, the base voltage source 14
The addition voltage source control circuit 12 controls the addition voltage source 13 so that the voltages of the two input voltages are equal.
The DC high voltage output from the high voltage output terminal 8 is stabilized at a constant level.
電源変調回路１７は左右糸巻歪補正などの歪補正を行う
もので、電源入力端子１９に入力された電源電圧を歪補
正信号入力端子２０ Ｋ入力された垂直パラボラ信号な
どの歪補正信号で変調することにより、水平偏向コイル
５を流れるのこぎり波電流を変調する構成となっている
。The power modulation circuit 17 performs distortion correction such as left and right pincushion distortion correction, and modulates the power supply voltage input to the power input terminal 19 with a distortion correction signal such as a vertical parabolic signal input to the distortion correction signal input terminal 20K. As a result, the sawtooth wave current flowing through the horizontal deflection coil 5 is modulated.
この電源電圧変調により、フライバックトランス６０２
次側に発生する高電圧も歪補正信号で変調されることに
なるが、本発明では歪補正信号を増幅回路１８で適当な
信号レベルに増幅した後、結合コンデンサ１１を介して
加算電圧源制御回路１２の一方の人力として加えること
により、加算ＩＦＥａ源１３を歪補正信号で変調し、高
電圧の変調を相殺させている。By this power supply voltage modulation, the flyback transformer 602
The high voltage generated on the next side is also modulated by the distortion correction signal, but in the present invention, the distortion correction signal is amplified to an appropriate signal level by the amplifier circuit 18, and then the addition voltage source is controlled via the coupling capacitor 11. By applying it to one side of the circuit 12, the summing IFEa source 13 is modulated with the distortion correction signal to cancel out the high voltage modulation.
第２図は、電源変調回路１７の具体的な回路例を示して
いる。第２図において、２１２２．２７は抵抗器、２３
は電源制御トランジスタ、２４は電源質請出力端子、２
５はトランジスタであり、歪補正信号入力端子２０に入
力した歪補正信号により、電源制御トランジスタ２３の
ペース電圧を変化させることにより電源変調を行ってい
る。FIG. 2 shows a specific circuit example of the power modulation circuit 17. In Figure 2, 2122.27 is a resistor, 23
is a power supply control transistor, 24 is a power supply quality check output terminal, 2
Reference numeral 5 denotes a transistor, which modulates the power supply by changing the pace voltage of the power supply control transistor 23 in accordance with the distortion correction signal inputted to the distortion correction signal input terminal 20.
第３図は、第１図の本発明の高圧回路の詳細な回路図で
ある。第３図において、加、算電圧源１３はスイッチン
グ電源であり、スイッチングトランジスタ３２、出カド
ランス３０、整流ダイ′オード２９などからなる。スイ
ッチングパルス入力端子３４にスイッチングパルスが入
力されると、スイッチングトランジスタ３２はスイッチ
ング動作し、出カドランス３０の２次側に高電圧が誘起
される。FIG. 3 is a detailed circuit diagram of the high voltage circuit of the present invention of FIG. In FIG. 3, the summing voltage source 13 is a switching power supply, and includes a switching transistor 32, an output transformer 30, a rectifying diode 29, and the like. When a switching pulse is input to the switching pulse input terminal 34, the switching transistor 32 performs a switching operation, and a high voltage is induced on the secondary side of the output transformer 30.
この高電圧を整流ダイオード２９で整流し、加算電圧源
出力端子２８からフライバックトランス６の２次側低圧
側端子に加算電圧源出力電圧を加えている。この加算電
圧源１３の出力電圧は、加算電圧源用電源入力端子３３
に加える電源電圧に比例するので、加算電圧制御回路１
２は端子３３に加える電源電圧を制御する回路となって
いる。加算電圧源制御回路１２は、誤差増幅用差動トラ
ンジスタ４ｔ ４２ ％電源制御トランジスタ４０など
からなり、エミッタフォロクの高圧検出トランジスタ４
９のエミッタに設けた可変抵抗器５０の出力電圧と歪補
正信号の増幅回路１８から結合コンデンサ１１を介して
加えられる電圧との加算電圧と、抵抗器３８、ツェナー
ダイオード３９からなる基準電圧源１４の出力電圧が等
しくなる様に、加算電圧源１３を制御し高圧を安定イビ
させている。This high voltage is rectified by a rectifier diode 29, and the output voltage of the addition voltage source is applied from the addition voltage source output terminal 28 to the secondary low voltage side terminal of the flyback transformer 6. The output voltage of this addition voltage source 13 is applied to the addition voltage source power input terminal 33.
Since it is proportional to the power supply voltage applied to
2 is a circuit for controlling the power supply voltage applied to the terminal 33. The addition voltage source control circuit 12 includes an error amplifying differential transistor 4t, a 42% power supply control transistor 40, and an emitter follower high voltage detection transistor 4.
The reference voltage source 14 consists of the sum of the output voltage of the variable resistor 50 provided at the emitter of 9 and the voltage applied from the distortion correction signal amplifier circuit 18 via the coupling capacitor 11, the resistor 38, and the Zener diode 39. The addition voltage source 13 is controlled to stabilize the high voltage so that the output voltages of the two are equal.
制御トランジスタ４０は、そのコレクタ電圧の制御範囲
が広いコモンエミッタ形を用いている。The control transistor 40 uses a common emitter type whose collector voltage can be controlled over a wide range.
また、加算電圧源１３を駆動するスイッチングパルスの
周波数は水平偏向周波数と同一でなくても良い。Furthermore, the frequency of the switching pulse that drives the addition voltage source 13 does not have to be the same as the horizontal deflection frequency.
増幅回路１８はトランジスタ４７によるエミッタ接地形
の反転増幅回路で、歪補正信号入力端子２Ｑに加えられ
た歪補正信号を反転増幅して誤差増幅用差動トランジス
タ４２のベースに加えている。The amplifier circuit 18 is an inverting amplifier circuit with a grounded emitter configuration using a transistor 47, and inverts and amplifies the distortion correction signal applied to the distortion correction signal input terminal 2Q, and applies the amplified signal to the base of the differential transistor 42 for error amplification.
その結果加算電圧源制御回路１２が歪補正信号で変調さ
れ、加算電圧源１３の出力電圧が変調される。この加算
電圧源１３の出力電圧の変調を、歪補正用電源変調回路
１７によるフライバックトランスの２次側に発生する高
電圧の変調と相殺する様に構成しているので、歪補正制
御と高圧安定化制御を独立に動作させることができる。As a result, the addition voltage source control circuit 12 is modulated by the distortion correction signal, and the output voltage of the addition voltage source 13 is modulated. Since the modulation of the output voltage of the addition voltage source 13 is configured to cancel out the modulation of the high voltage generated on the secondary side of the flyback transformer by the distortion correction power supply modulation circuit 17, distortion correction control and high voltage Stabilization control can be operated independently.
以上説明した様に、本発明によれば偏向高圧一体形回路
において電源電圧変調方式の歪補正方毀を採用した場合
に、歪補正制御と高圧安定化制御を独立に動作できるの
で動作安定性の優れた高田回路を低価格で提供できる効
果がある。As explained above, according to the present invention, when a power supply voltage modulation distortion correction method is adopted in a deflection high voltage integrated circuit, distortion correction control and high voltage stabilization control can be operated independently, thereby improving operational stability. This has the effect of providing an excellent Takada circuit at a low price.
第１図は本発明の一実施例を示す高圧回路の回路図、第
２図は第１図中の電源変調回路の具体的回路図、第３図
は第１図の具体的回路図である。
３・・・ダンパーダイオード、４・・・共振コンデンサ
。
５・・・水平偏向コイル、７・・・高圧整流ダイオード
。
８・・・高圧出力端子、９１０・・・高圧分割抵抗器、
１１・・・結合コンデンサ、１３・・・加算電圧源、１
４・・・基準電圧源、１７・・・電源変調回路、１８・
・・増幅回路、１９・・・電源入力端子、２０・・・歪
補正信号入力端子、２３・・・電源制御トランジスタ、
２５・・・トランジスタ。
３０・・・出カドランス、４７・・・トランジスタ、４
９・・・高圧検出トランジスタ、５１・・・コンデンサ
、５２・・・ダイオード。
第 ＩＩ！１
躬 ３ 図FIG. 1 is a circuit diagram of a high voltage circuit showing an embodiment of the present invention, FIG. 2 is a specific circuit diagram of the power modulation circuit in FIG. 1, and FIG. 3 is a specific circuit diagram of FIG. 1. . 3... Damper diode, 4... Resonant capacitor. 5...Horizontal deflection coil, 7...High voltage rectifier diode. 8...High voltage output terminal, 910...High voltage dividing resistor,
11... Coupling capacitor, 13... Addition voltage source, 1
4... Reference voltage source, 17... Power modulation circuit, 18.
...Amplification circuit, 19...Power input terminal, 20...Distortion correction signal input terminal, 23...Power supply control transistor,
25...Transistor. 30... Output Lance, 47... Transistor, 4
9... High voltage detection transistor, 51... Capacitor, 52... Diode. Part II! 1. 3. Figure
Claims (1)
コンデンサ、水平偏向コイルからなる水平偏向回路の帰
線期間に生じるパルス電圧をフライバックトランスによ
り昇圧して高圧を得る偏向・高圧一体形の高圧回路にお
いて、歪補正信号を入力することにより歪補正を行う電
源電圧変調回路を設けると共に、フライバックトランス
の２次側の低圧側端子に加算電圧源を設け、該フライバ
ックトランスの高圧出力電圧を検出する回路の出力信号
と上記歪補正信号とにより該加算電圧源を制御する制御
回路を設けたことを特徴とする高圧回路。1. In a high-voltage circuit that integrates deflection and high voltage, a flyback transformer boosts the pulse voltage generated during the retrace period of a horizontal deflection circuit consisting of a horizontal output transistor, a damper diode, a resonant capacitor, and a horizontal deflection coil. A power supply voltage modulation circuit that performs distortion correction by inputting a correction signal is provided, and an addition voltage source is provided at the low voltage side terminal on the secondary side of the flyback transformer, and a circuit for detecting the high voltage output voltage of the flyback transformer is provided. A high voltage circuit comprising a control circuit that controls the addition voltage source using an output signal and the distortion correction signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62068851A JPH0771192B2 (en) | 1987-03-25 | 1987-03-25 | High voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62068851A JPH0771192B2 (en) | 1987-03-25 | 1987-03-25 | High voltage circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63236474A true JPS63236474A (en) | 1988-10-03 |
| JPH0771192B2 JPH0771192B2 (en) | 1995-07-31 |
Family
ID=13385585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62068851A Expired - Lifetime JPH0771192B2 (en) | 1987-03-25 | 1987-03-25 | High voltage circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0771192B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4113922B4 (en) * | 1990-04-30 | 2006-04-27 | Thomson Consumer Electronics, Inc., Indianapolis | Circuit arrangement for stabilizing the high voltage for a video image display device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4916322A (en) * | 1972-05-20 | 1974-02-13 |
-
1987
- 1987-03-25 JP JP62068851A patent/JPH0771192B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4916322A (en) * | 1972-05-20 | 1974-02-13 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4113922B4 (en) * | 1990-04-30 | 2006-04-27 | Thomson Consumer Electronics, Inc., Indianapolis | Circuit arrangement for stabilizing the high voltage for a video image display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0771192B2 (en) | 1995-07-31 |
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