JPS59165570A - S-shape correction circuit - Google Patents
S-shape correction circuitInfo
- Publication number
- JPS59165570A JPS59165570A JP3853583A JP3853583A JPS59165570A JP S59165570 A JPS59165570 A JP S59165570A JP 3853583 A JP3853583 A JP 3853583A JP 3853583 A JP3853583 A JP 3853583A JP S59165570 A JPS59165570 A JP S59165570A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- power supply
- current
- diode
- correction
- 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.)
- Pending
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
- H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
Description
【発明の詳細な説明】
(a)1発明の技術分野
本発明はS字補正回路に係り、特に結合チョーク・コイ
ルを使用することなく直流電流を供給するS字補正回路
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) 1 Technical Field of the Invention The present invention relates to an S-shaped correction circuit, and more particularly to an S-shaped correction circuit that supplies direct current without using a coupling choke coil.
(b)、従来技術と問題点
ブラウン管の表示面が載量率半径を有する時偏向中心か
ら表示面までの距離に比べ表示面の曲率半径が大きい場
合、偏向コイルに直線的に増加する「のこぎり波型流」
を流すとブラウン管上のラスタは両端で伸び、中心で縮
む。此れを補正する為にはS字形にひずませた「のこぎ
り波型流」を流せば良いが、此の補正を8字補正と云う
。(b), Prior Art and Problems When the display surface of a cathode ray tube has a loading rate radius, if the radius of curvature of the display surface is larger than the distance from the deflection center to the display surface, the "saw" that increases linearly in the deflection coil “Wave style”
When rays are played, the raster on the cathode ray tube expands at both ends and contracts at the center. To correct this, it is sufficient to flow a ``sawtooth wave flow'' distorted into an S-shape, and this correction is called 8-character correction.
此の8字補正電流を得る為に従来は、偏向コイルと直列
にコンデンサを接続し、偏向コイルとコンデンサとの直
列共振によりS字形の「のこぎり波型流」を流していた
。Conventionally, to obtain this figure-8 correction current, a capacitor was connected in series with the deflection coil, and an S-shaped "sawtooth wave" flow was caused by series resonance between the deflection coil and the capacitor.
従来技術によると8字補正に必要な偏向電流iは但しk
は常数、
Lは偏向中心から表示面までの距離、
Hは表示面の幅、
Rは表示面の曲率、
t、は走査期間、
tは一々<1<手とする。According to the conventional technology, the deflection current i required for figure-8 correction is k
is a constant, L is the distance from the center of deflection to the display surface, H is the width of the display surface, R is the curvature of the display surface, t is the scanning period, and t is <1<hand.
第1図は従来の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing a conventional embodiment.
第1図に於いて、Lyは偏向コイル、Csは8字補正コ
ンデンサ、Loは結合チョーク・コイル、Eは電源、C
は共振コンデンサ、Dはダンパー・ダイオード、Trは
スイッチング・トランジスタである。In Figure 1, Ly is a deflection coil, Cs is a figure-8 correction capacitor, Lo is a coupling choke coil, E is a power supply, and C
is a resonant capacitor, D is a damper diode, and Tr is a switching transistor.
第1図に示す様に偏向コイルLyと直列にコンデンサC
sを使用し、両者の直列共振によりS字形の「のこぎり
波電流」を流していた。然し電源Eと偏向コイルLyを
直接接続出来ないので、電源Eと偏向コイルLyとの間
に結合チョーク・コイルLO(又はフライバック・1−
ランス)が必要となる。通常は高圧発生用のフライバッ
ク・トランスを使用するが、ディスプレイ装置等、画面
のサイズ変動(高電圧変動による)が問題になる場合高
圧安定化の為、高圧回路を分離しなければならない。従
って余分なチョーク・コイルLoを使用しなければなら
ないと云う欠点がある。As shown in Figure 1, a capacitor C is connected in series with the deflection coil Ly.
s was used, and an S-shaped "sawtooth wave current" was caused to flow through series resonance between the two. However, since power source E and deflection coil Ly cannot be directly connected, a coupling choke coil LO (or flyback coil LO) is connected between power source E and deflection coil Ly.
Lance) is required. Normally, a flyback transformer is used to generate high voltage, but in cases where screen size fluctuations (due to high voltage fluctuations) are a problem, such as in display devices, the high voltage circuit must be separated to stabilize the high voltage. Therefore, there is a disadvantage that an extra choke coil Lo must be used.
(C)0発明の目的
本発明の目的は従来技術の有する上記の欠点を除去し、
電源に直接結合することが出来るS字補正回路を提供す
ることである。(C)0Object of the invention The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art,
It is an object of the present invention to provide an S-shaped correction circuit that can be directly coupled to a power source.
(d)0発明の構成
」二記の目的は本発明によれば、水平偏向コイルにスイ
ッチング用トランジスタ及び共振コンデンサを接続して
「のこぎり波」電流を流す水平偏向回路に於いて、一つ
の直列共振回路を構成する前記水平偏向コイルと3字補
正用コンデンサの接続点に直流電源よりダイオードを経
由して直流電流を供給することを特徴とするS字補正回
路を提供することにより達成される。(d) 0 Structure of the Invention According to the present invention, in a horizontal deflection circuit in which a switching transistor and a resonant capacitor are connected to a horizontal deflection coil to flow a "sawtooth" current, one series This is achieved by providing an S-shaped correction circuit characterized in that a DC current is supplied via a diode from a DC power source to a connection point between the horizontal deflection coil and the three-shaped correction capacitor that constitute a resonant circuit.
(e)1発明の実施例
第2図は本発明の一実施例を示すS字補正回路図であり
、第3図は其の等価回路である。(e) 1 Embodiment of the Invention FIG. 2 is an S-shaped correction circuit diagram showing an embodiment of the present invention, and FIG. 3 is its equivalent circuit.
第2図、第3図に於いて、Lyは偏向コイル、Eは電源
、D′はダイオード、C5は8字補正コンデンサ、Sは
等価スイッチ、Cはコンデンサ、Dばダンパー・ダイオ
ード、Trはスイッチング・トランジスタである。In Figures 2 and 3, Ly is a deflection coil, E is a power supply, D' is a diode, C5 is a figure-8 correction capacitor, S is an equivalent switch, C is a capacitor, D is a damper diode, and Tr is a switching device.・It is a transistor.
尚第2図に於いて、スイッチング・トランジスタTrが
0N10FFすることにより開放、短絡を繰り返すので
、第3図の等価回路が得られる。In FIG. 2, the switching transistor Tr repeats open and short circuits by turning on and off, so that the equivalent circuit shown in FIG. 3 is obtained.
以下第3図に従って本発明の詳細な説明する。The present invention will be described in detail below with reference to FIG.
此の場合、偏向コイルLyと8字補正コンデンサCsと
の直列共振を利用し、直流電源EはダイオードD°を経
由して供給される。即ち偏向コイルLyと8字補正コン
デンサCsとの直列共振により生ずる8字補正コンデン
サCsの端子電圧が直流電源Eよりも小さい時にダイオ
ードD゛を経由して電流を供給し、逆に8字補正コンデ
ンサC3の端子電圧が直流電源Eよりも大きい時には電
流の供給を停止する。此の様に従来のチョーク・コイル
Loを使用することなく直流電源を供給することが出来
る。In this case, the DC power E is supplied via the diode D° by utilizing the series resonance between the deflection coil Ly and the figure-8 correction capacitor Cs. That is, when the terminal voltage of the figure-8 correction capacitor Cs, which is generated by series resonance between the deflection coil Ly and the figure-8 correction capacitor Cs, is smaller than the DC power supply E, current is supplied via the diode D', and conversely, the figure-8 correction capacitor When the terminal voltage of C3 is higher than the DC power supply E, the current supply is stopped. In this way, DC power can be supplied without using the conventional choke coil Lo.
(f)3発明の効果
以上詳細に説明した様に本発明によれば、■従来の様に
結合チョーク・コイルを使用することなく■安価なダイ
オードを使用して偏向コイルLyと8字補正コンデンサ
Csとの直列共振回路に直流電源を供給出来ると云う大
きい効果がある。(f) 3 Effects of the Invention As explained in detail above, according to the present invention, ■ without using a coupling choke coil as in the past, ■ using an inexpensive diode to connect the deflection coil Ly and the figure-8 correction capacitor. This has the great effect of being able to supply DC power to the series resonant circuit with Cs.
第1図は従来の一実施例を示す回路図である。
第1図に於いて、Lyは偏向コイル、Csは8字補正コ
ンデンサ、Loは結合チョーク・コイル、Eは電源、C
はコンデンサ、Dはダンパー・ダイオード、Trはスイ
ッチング・トランジスタである。
第2図は本発明の一実施例を示すS字補正回路図であり
、第3図は其の等価回路である。
第2図、第3図に於いて、Lyは偏向コイル、Eは電源
、D′はダイオード、Csは8字補正コンデンサ、Sは
スイッチ、Cばコンデンサ、Dはダンパー・ダイオード
、Trはスイッチング・トランジスタである。FIG. 1 is a circuit diagram showing a conventional embodiment. In Figure 1, Ly is a deflection coil, Cs is a figure-8 correction capacitor, Lo is a coupling choke coil, E is a power supply, and C
is a capacitor, D is a damper diode, and Tr is a switching transistor. FIG. 2 is an S-shaped correction circuit diagram showing an embodiment of the present invention, and FIG. 3 is an equivalent circuit thereof. In Figures 2 and 3, Ly is a deflection coil, E is a power supply, D' is a diode, Cs is a figure-8 correction capacitor, S is a switch, C is a capacitor, D is a damper diode, and Tr is a switching capacitor. It is a transistor.
Claims (1)
コンデンサを接続して「のこぎり波」電流を流す水平偏
向回路に於いて、一つの直列共振回路を構成する前記水
平偏向コイルと8字補正用コンデンサの接続点に直流電
源よりダイオードを経由して直流電流を供給することを
特徴とするS字補正回路。In a horizontal deflection circuit in which a switching transistor and a resonant capacitor are connected to a horizontal deflection coil to flow a "sawtooth" current, at the connection point of the horizontal deflection coil and the figure-8 correction capacitor that constitute one series resonant circuit. An S-shaped correction circuit characterized by supplying DC current from a DC power supply via a diode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3853583A JPS59165570A (en) | 1983-03-09 | 1983-03-09 | S-shape correction circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3853583A JPS59165570A (en) | 1983-03-09 | 1983-03-09 | S-shape correction circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59165570A true JPS59165570A (en) | 1984-09-18 |
Family
ID=12527970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3853583A Pending JPS59165570A (en) | 1983-03-09 | 1983-03-09 | S-shape correction circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59165570A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0987881A1 (en) * | 1998-09-14 | 2000-03-22 | Sony Corporation | Horizontal deflection circuit |
-
1983
- 1983-03-09 JP JP3853583A patent/JPS59165570A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0987881A1 (en) * | 1998-09-14 | 2000-03-22 | Sony Corporation | Horizontal deflection circuit |
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