JPS61199381A - Horizontal deflecting circuit - Google Patents

Horizontal deflecting circuit

Info

Publication number
JPS61199381A
JPS61199381A JP3969285A JP3969285A JPS61199381A JP S61199381 A JPS61199381 A JP S61199381A JP 3969285 A JP3969285 A JP 3969285A JP 3969285 A JP3969285 A JP 3969285A JP S61199381 A JPS61199381 A JP S61199381A
Authority
JP
Japan
Prior art keywords
horizontal
coil
circuit
additional
deflecting
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
Application number
JP3969285A
Other languages
Japanese (ja)
Other versions
JPH0473832B2 (en
Inventor
Hideki Teramatsu
英樹 寺松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric Co Ltd
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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP3969285A priority Critical patent/JPS61199381A/en
Publication of JPS61199381A publication Critical patent/JPS61199381A/en
Publication of JPH0473832B2 publication Critical patent/JPH0473832B2/ja
Granted legal-status Critical Current

Links

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
    • H04N3/27—Circuits special to multi-standard receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To obtain a wave form of the deflecting current of whose deflecting power and ratio between the horizontal scanning period and horizontal retrace periods are constant as following the variation of the horizontal oscillating frequency by selectively shortcircuiting either of an additional capacitor and an additional coil connected in series respectively with the resonance capacitor and horizontal deflecting coil in the horizontal output circuit. CONSTITUTION:The horizontal output circuit 12 consists of the additional capaci tor C11 connected in series with the resonance capacitor C and the additional coil L11 connected likewise with the horizontal deflecting coil L. The said capaci tor C11 and coil L11 can be short-circuited by closing switching S and S' con nected in parallel on/off. A control circuit 15 changes the horizontal oscillating frequency of the horizontal oscillating circuit 13 into f1 or f2, and at the same time selectively closes either of the two switches S and S'. Accordingly, the frequency of the deflecting current waveform is made variable as maintaining the ratio between the horizontal scanning period and horizontal retrace periods constant, as well as the deflection power consumed by the horizontal deflecting coil constant. Therefore, sufficient deflection power is obtained regardless of the horizontal oscillating frequency.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、水平発振周波数が切り換え可能な水平偏向
回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a horizontal deflection circuit whose horizontal oscillation frequency can be switched.

〔従来の技術〕[Conventional technology]

ＫＧＢ入力端子付きのテレビジョン受像機は。 A television receiver with a KGB input terminal.

ＲＧＢ信号（原色映像信号）を供給するパーソナルコン
ピュータからの水平同期信号の周波数が。The frequency of the horizontal synchronization signal from the personal computer that supplies RGB signals (primary color video signals).

テレビジョン信号と同じ１５．７５　ｋＨｚであれば１
問題なくパーソナルコンピュータに接続することができ
るが、パーソナルコンピュータの方は１機種によっては
、モニタ出力に付随する水平同期信号の周波数を、　２
４．８ｋＨｚ　　に設定したものがあり。1 if it is 15.75 kHz, which is the same as a television signal.
Although it can be connected to a personal computer without any problems, depending on the model of personal computer, the frequency of the horizontal synchronization signal accompanying the monitor output may be 2.
There is one set to 4.8kHz.

高解像度タイプのものほど、水平同期信号として周波数
が高いものが用いられる傾向がある。The higher the resolution type, the higher the frequency of the horizontal synchronization signal tends to be used.

第３図に示す従来の水平偏向回路１は、藁屑は度のパー
ソナルコンピュータから送られてくる２４．８ｋＨｚ　
　の水平同期信号にも対応できるよう。The conventional horizontal deflection circuit 1 shown in FIG.
Also compatible with horizontal synchronization signals.

水平出力回路２内の共振コンデンサＣと水平偏向コイル
Ｌにそれぞれ、スイッチＳａ、Ｓｂにより閉路されるコ
ンデンサＣＩとコイルＬ１を並列接続し。A capacitor CI and a coil L1, which are closed by switches Sa and Sb, are connected in parallel to a resonance capacitor C and a horizontal deflection coil L in the horizontal output circuit 2, respectively.

スイッチＳａ、Ｓｂの切り換えにより回路定数を変更し
、水平出力を変更するよう構成したものである。すなわ
ち、水平発振回路３に接続された水平駆動回路４の出力
である水平駆動パルスによりオン拳オフを繰り返す水平
出力トランジスタＱのコレクタには、ダンパダイオード
Ｄ、共振コンデンサＣ，コンデンサＣ１，Ｓ字補正用の
コンデンサＣ８と水平偏向コイルＬとコイルＬ、の並列
接続回路が接続してあり、フライバックトランス５の１
次側コイルを介して電源ＶＣＣからの電流が供給される
。The circuit constant is changed by switching the switches Sa and Sb, and the horizontal output is changed. That is, the collector of the horizontal output transistor Q, which repeats on-fist-off by the horizontal drive pulse that is the output of the horizontal drive circuit 4 connected to the horizontal oscillation circuit 3, includes a damper diode D, a resonant capacitor C, a capacitor C1, and an S-shaped correction capacitor. A parallel connection circuit of the horizontal deflection coil L and the coil L is connected to the capacitor C8 for the flyback transformer 5.
Current from the power supply VCC is supplied via the next coil.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記従来の水平偏向回路１は、スイッチＳａ、Ｓｂの切
り換え（こより水平発振周波数を変化させたときに、水
平偏向コイルＬを流れる偏向電流波形について、水平走
査期間と水平帰線期間の比が変らないように回路定数を
設定すると、偏向電力が十分得られないことがあり、電
源電圧の変動とともに水平偏向が乱れることがある等の
問題点があった。In the conventional horizontal deflection circuit 1, when the horizontal oscillation frequency is changed by switching the switches Sa and Sb, the ratio of the horizontal scanning period to the horizontal retrace period changes with respect to the deflection current waveform flowing through the horizontal deflection coil L. If the circuit constants are set so as not to cause the deflection, sufficient deflection power may not be obtained, and horizontal deflection may be disturbed due to fluctuations in the power supply voltage.

〔問題点を解決するための手段〕[Means for solving problems]

この発明は、上記問題点を解決したものであり。 This invention solves the above problems.

水平発振周波数でオン・オフ駆動される水平出力トラン
ジスタに、ダンパダイオード、共振コンデンサ、水平偏
向コイルが並列的に接続された水平出力回路を有する水
平偏向回路であって、前記共振コンデンサに直列接続し
た付加コンデンサと。A horizontal deflection circuit having a horizontal output circuit in which a damper diode, a resonant capacitor, and a horizontal deflection coil are connected in parallel to a horizontal output transistor driven on and off at a horizontal oscillation frequency, and the horizontal output circuit is connected in series to the resonant capacitor. with additional capacitor.

前記水平偏向コイルに直列接続した付加コイルと。and an additional coil connected in series to the horizontal deflection coil.

この付加コイルと前記付加コンデンサのいずれか一方を
選択的に短絡し、水平出力を可変する制御回路とを設け
て構成したことを要旨とするものである。The gist of the present invention is to provide a control circuit that selectively shorts either the additional coil or the additional capacitor to vary the horizontal output.

〔作用〕[Effect]

この発明は、水平出力回路内の共振コンデンサと水平偏
向コイルにそれぞれ直列接続した付加コンデンサと付加
コイルのうち、一方を選択的に短絡することｌこより、
水平発振周波数の変化に対応しつつ、偏向電力不変でか
つ水平走査期間と水平帰線期間の比が不変である偏向電
流波形を得る。The present invention includes selectively short-circuiting one of an additional capacitor and an additional coil connected in series to a resonant capacitor and a horizontal deflection coil in a horizontal output circuit, respectively.
To obtain a deflection current waveform in which the deflection power remains unchanged and the ratio of the horizontal scanning period to the horizontal retrace period remains unchanged while responding to changes in the horizontal oscillation frequency.

〔実施例〕〔Example〕

以下、この発明の実施例について１図面を参照して説明
する。第１，２図は、それぞれこの発明の水平偏向回路
の一実施例を示す回路構成図及び回路各部の信号波形図
である。Embodiments of the present invention will be described below with reference to one drawing. 1 and 2 are a circuit configuration diagram and a signal waveform diagram of each part of the circuit, respectively, showing an embodiment of the horizontal deflection circuit of the present invention.

第１図中、水平偏向回路１１は、水平発振周波数がｆｓ
　（＝　１５．７５　ｋＨｚ　）とｆ宜（＝　２４．８
　ｋＨｚ　）の２種類の周波数に切り換えることができ
る水平発振回路１３と、水平発振回路１３の出力を増幅
する水平駆動回路１４．水平偏向コイルＬに偏向電流を
供給する水平出力回路１２及び水平発振回路１３と水平
出力回路１２に接続され、これらを制御する制御回路１
５とから構成される。In FIG. 1, the horizontal deflection circuit 11 has a horizontal oscillation frequency of fs.
(= 15.75 kHz) and f (= 24.8
A horizontal oscillation circuit 13 that can switch between two types of frequencies (kHz), and a horizontal drive circuit 14 that amplifies the output of the horizontal oscillation circuit 13. A control circuit 1 that is connected to a horizontal output circuit 12 that supplies a deflection current to a horizontal deflection coil L, a horizontal oscillation circuit 13, and the horizontal output circuit 12, and controls them.
It consists of 5.

水平出力回路１２は、共振コンデンサＣに直列接続した
付加コンデンサＣ１１と水平偏向コイルＬに直列接続し
た付加コイルＬｌｌを有しており、これらの付加コンデ
ンサＣｔｔと付加コイルＬｌｌは、それぞれ並列接続し
たスイッチＳ、Ｓを閉成することにより、短絡すること
ができる。制御回路１５は。The horizontal output circuit 12 has an additional capacitor C11 connected in series to the resonant capacitor C, and an additional coil Lll connected in series to the horizontal deflection coil L. These additional capacitor Ctt and additional coil Lll are connected to switches connected in parallel, respectively. A short circuit can be achieved by closing S and S. The control circuit 15 is.

水平発振回路１３の水平発振周波数を【１又はｆ、に切
り換えるとともに、上記２個のスイッチＳ又はＳのうち
の一方を選択的に閉成する。従って、スイッチＳと８は
、互いに逆動作で開閉成するようになっており、制御回
路１５とスイッチＳの間には。The horizontal oscillation frequency of the horizontal oscillation circuit 13 is switched to [1 or f], and one of the two switches S or S is selectively closed. Therefore, the switches S and 8 are configured to open and close in reverse operation to each other, and between the control circuit 15 and the switch S.

制御回路１５の出力を極性反転する反転回路１６が設け
である。An inversion circuit 16 for inverting the polarity of the output of the control circuit 15 is provided.

この実施例では、制御回路１５が水平発振周波数を　ｆ
□に設定した場合、スイッチＳが閉成し、スイッチＳが
開成する。また、制御回路１５が水平発振周波数をｆ、
に設定した場合、スイッチＳが開成し、スイッチＳが閉
成する。In this embodiment, the control circuit 15 sets the horizontal oscillation frequency to f
When set to □, switch S is closed and switch S is opened. Further, the control circuit 15 sets the horizontal oscillation frequency to f,
When set to , switch S is opened and switch S is closed.

ここで、共振コンデンサＣと付加コンデンサＣ１ｌの容
量をＣａ、Ｃｂ、水平偏向コイルＬと付加コイルＬｌｌ
のインダクタンスをＬａ　ｐ　Ｌｂ　　とし、さらに水
平発振周波数がｆ、　、　ｆ、　　での動作を区別する
ため、水平走査期間ＴＳ　ｅ水平帰線期間Ｔｒ　ａ偏向
電流波形に、それぞれｆ！、　ｆ、に対応して、添字１
゜２を付して表わすと。Here, the capacitances of the resonant capacitor C and the additional capacitor C1l are Ca, Cb, the horizontal deflection coil L and the additional coil Lll
The inductance of is La p Lb , and in order to distinguish between the operations when the horizontal oscillation frequency is f, , f, , f! , f, with subscript 1
Expressed by adding ゜2.

なる関係式が成立する。The following relational expression holds true.

そして、水平走査期間Ｔｓと水平帰線期間Ｔｒの比を変
えず、しかも水平偏向コイルＬで消費される水平偏向電
力も不変であるという条件。The condition is that the ratio between the horizontal scanning period Ts and the horizontal retrace period Tr remains unchanged, and the horizontal deflection power consumed by the horizontal deflection coil L also remains unchanged.

が成立するための関係式を求めると、　　Ｉｐｌ：Ｉｐ
２であるから。When we find the relational expression for this to hold, Ipl:Ip
Because it is 2.

が得られる。is obtained.

このように、付加コンデンサＣ１□の容ｔｃｂ及び付加
コイルＬ１１のインダクタンスＬｂ　は、それぞれＣａ
とＬａ及び水平発振周波数ｆ１とｆ、の比ｋにのみ依存
し、従って比ｋがあらかじめ判っていれば、簡単に回路
定数の設定が可能であり、しかも偏向電力不変で、かつ
水平走査期間と水平帰線期間の比が不変の偏向電流波形
を得ることができる。In this way, the capacitance tcb of the additional capacitor C1□ and the inductance Lb of the additional coil L11 are each Ca
and La, and the horizontal oscillation frequencies f1 and f. Therefore, if the ratio k is known in advance, it is possible to easily set the circuit constants, and the deflection power remains unchanged, and the horizontal scanning period It is possible to obtain a deflection current waveform in which the ratio of the horizontal retrace period remains unchanged.

このように、上記水平偏向回路１１は、水平出力回路１
２内の共振コンデンサＣと水平偏向コイルＬに対し、そ
れぞれ付加コンデンサＣｔｔと付加コイルＬ口を直列接
続により付加し、これらの付加コンデンサＣ１ｌ及び付
加コイルＬｌｌの一方を選択的に短絡することｌこより
、水平発振周波数の変化に対応させて、水平出力を可変
する構成としたから水平走査期間Ｔｓと水平帰線期間Ｔ
ｒの比を一定に保ったまま、偏向電流波形の周波数を可
変することができ、しかも水平偏向コイルＬで消費され
る偏向電力を一定に保つこともできるから、水平発振周
波数によらず十分な偏向電力を得ることができ１ｇｔ源
電圧電圧動ｔこより水平偏向が乱れる等の不都合を防止
することができる。In this way, the horizontal deflection circuit 11 has the horizontal output circuit 1
By adding an additional capacitor Ctt and an additional coil L port in series to the resonant capacitor C and horizontal deflection coil L in 2, respectively, and selectively short-circuiting one of these additional capacitor C1l and additional coil Lll. , the horizontal scanning period Ts and the horizontal retrace period T are configured to vary the horizontal output in response to changes in the horizontal oscillation frequency.
The frequency of the deflection current waveform can be varied while keeping the ratio of r constant, and the deflection power consumed by the horizontal deflection coil L can also be kept constant. Deflection power can be obtained, and inconveniences such as horizontal deflection being disturbed due to voltage fluctuations in the 1gt source voltage can be prevented.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明によれば、水平出力回路
内の共振コンデンサと水平偏向ヨイルに対し、それぞれ
付加コンデンサと付加コイルを直列接続により付加し、
これらの付加コンデンサ及び付加コイルの一方を選択的
に短絡することにより、水平発振周波数の変化に対応さ
せて、水平出力を可変する構成としたから、水平走査期
間と水平帰線期間の比を一定に保ったまま、偏向電流波
形の周波数を可変することができ、しかも水平偏向コイ
ルで消費される偏向電力を一定に保つこともできるから
、水平発振周波数によらず十分な偏向電力を得ることが
でき、電源電圧の変動により水平偏向が乱れる等の不都
合を防止することができる等の優れた効果を奏する。As explained above, according to the present invention, an additional capacitor and an additional coil are added in series to the resonant capacitor and the horizontal deflection coil in the horizontal output circuit, respectively.
By selectively shorting one of these additional capacitors and additional coils, the horizontal output can be varied in response to changes in the horizontal oscillation frequency, so the ratio of the horizontal scanning period to the horizontal retrace period can be kept constant. It is possible to vary the frequency of the deflection current waveform while maintaining the horizontal oscillation frequency, and it is also possible to keep the deflection power consumed by the horizontal deflection coil constant, so sufficient deflection power can be obtained regardless of the horizontal oscillation frequency. This provides excellent effects such as being able to prevent inconveniences such as disturbances in horizontal deflection due to fluctuations in power supply voltage.

【図面の簡単な説明】[Brief explanation of drawings]

第１，２図は、それぞれこの発明の水平偏向回路の一実
施例を示す回路構成図及び回路各部の信号波形図、第３
図は、従来の水平偏向回路の一例を示す回路構成図であ
る。 １１・・・水平偏向回路、１２・・・水平出力回路、１
３・・・水平発振回路、１４・・・水平駆動回路、１５
・・・制御回路。 Ｑ・・・水平出力トランジスタ、Ｃ・・・共振コンデン
サ。 Ｌ・・・水平偏向コイル、Ｃ１０・・・付加コンデンサ
、Ｌｌｌ・・・付加コイル、Ｓ、Ｓ・・・スイッチ。1 and 2 are a circuit configuration diagram and a signal waveform diagram of each part of the circuit, respectively, showing an embodiment of the horizontal deflection circuit of the present invention.
The figure is a circuit configuration diagram showing an example of a conventional horizontal deflection circuit. 11...Horizontal deflection circuit, 12...Horizontal output circuit, 1
3...Horizontal oscillation circuit, 14...Horizontal drive circuit, 15
...Control circuit. Q...Horizontal output transistor, C...Resonant capacitor. L...Horizontal deflection coil, C10...Additional capacitor, Lll...Additional coil, S, S...Switch.

Claims (1)

【特許請求の範囲】[Claims] 水平発振周波数でオン・オフ駆動される水平出力トラン
ジスタに、ダンパダイオード、共振コンデンサ、水平偏
向コイルが並列的に接続された水平出力回路を有する水
平偏向回路であつて、前記共振コンデンサに直列接続し
た付加コンデンサと、前記水平偏向コイルに直列接続し
た付加コイルと、この付加コイルと前記付加コンデンサ
のいずれか一方を選択的に短絡し、水平出力を可変する
制御回路とを設けてなる水平偏向回路。A horizontal deflection circuit having a horizontal output circuit in which a damper diode, a resonant capacitor, and a horizontal deflection coil are connected in parallel to a horizontal output transistor driven on and off at a horizontal oscillation frequency, the horizontal output circuit being connected in series to the resonant capacitor. A horizontal deflection circuit comprising an additional capacitor, an additional coil connected in series to the horizontal deflection coil, and a control circuit that selectively shorts either the additional coil or the additional capacitor to vary the horizontal output.
JP3969285A 1985-02-28 1985-02-28 Horizontal deflecting circuit Granted JPS61199381A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3969285A JPS61199381A (en) 1985-02-28 1985-02-28 Horizontal deflecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3969285A JPS61199381A (en) 1985-02-28 1985-02-28 Horizontal deflecting circuit

Publications (2)

Publication Number Publication Date
JPS61199381A true JPS61199381A (en) 1986-09-03
JPH0473832B2 JPH0473832B2 (en) 1992-11-24

Family

ID=12560090

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3969285A Granted JPS61199381A (en) 1985-02-28 1985-02-28 Horizontal deflecting circuit

Country Status (1)

Country Link
JP (1) JPS61199381A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61294971A (en) * 1985-06-19 1986-12-25 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Line output circuit
JPS6356865U (en) * 1986-09-30 1988-04-15
JPS63164762A (en) * 1986-12-26 1988-07-08 Mitsubishi Electric Corp Circuit for switching resonance capacitor
EP0322030A2 (en) * 1987-12-18 1989-06-28 Philips Electronics Uk Limited Arrangement for generating a sawtooth current

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61294971A (en) * 1985-06-19 1986-12-25 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Line output circuit
JPH0535949B2 (en) * 1985-06-19 1993-05-27 Fuiritsupusu Furuuiranpenfuaburiken Nv
JPS6356865U (en) * 1986-09-30 1988-04-15
JPS63164762A (en) * 1986-12-26 1988-07-08 Mitsubishi Electric Corp Circuit for switching resonance capacitor
EP0322030A2 (en) * 1987-12-18 1989-06-28 Philips Electronics Uk Limited Arrangement for generating a sawtooth current

Also Published As

Publication number Publication date
JPH0473832B2 (en) 1992-11-24

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