JPS58169181A - Deflection circuit - Google Patents
Deflection circuitInfo
- Publication number
- JPS58169181A JPS58169181A JP5212182A JP5212182A JPS58169181A JP S58169181 A JPS58169181 A JP S58169181A JP 5212182 A JP5212182 A JP 5212182A JP 5212182 A JP5212182 A JP 5212182A JP S58169181 A JPS58169181 A JP S58169181A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- sawtooth
- circuit
- current
- charge
- 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
Landscapes
- Details Of Television Scanning (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（Ａ） 発明の技術分野
本発明は、偏向回路、特にブラウン管ディスプレイなど
における偏向回路において、同期信号に同期して作られ
るのこぎり両室圧における電荷放電時（帰＠網間）の放
電特性を調整せしめるようにし、ディスプレイ画面と表
示画偉との位置関係を調整する直流成汁供給回路を省略
できるようにした偏向回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION (A) Technical Field of the Invention The present invention relates to a deflection circuit, particularly a deflection circuit for a cathode ray tube display, etc., in which electric charges are discharged in a sawtooth chamber pressure generated in synchronization with a synchronization signal (return This invention relates to a deflection circuit that can adjust the discharge characteristics between the display screen and the display screen and omit a direct current juice supply circuit that adjusts the positional relationship between the display screen and the display screen.
ＣＢ） 技術の背景と間眺点
従来からブラウン管ディスプレイなどの偏向回路におい
ては、コンデンサの充放電を利用してのこぎゆ両室圧を
生成し、のこきり両室流生成回路によってのこき゛り両
室流をつくって偏向コイルに供給するようにされる。第
１図はこのような偏向回路の一例を示し、図中の符号ｌ
は放電制御回路を構成するスイッチ・トランジスタ、２
は放電、時定数を構成する抵抗、３は定電流源、４はコ
ンデンサ、５はコンデンサ端子電圧検出用トランジスタ
、６は抵抗、７は電圧−電流変換増幅器、８は偏向コイ
ル、９はコンデンサ、１Ｏ１１１は夫々抵抗、１２は直
流成分供給用ポテンシオメータを表わしている。CB) Technical Background and Perspective Points Traditionally, in deflection circuits for cathode ray tube displays, etc., the charging and discharging of capacitors are used to generate sawtooth bichamber pressure. A current is created and supplied to the deflection coil. FIG. 1 shows an example of such a deflection circuit.
2 is a switch transistor constituting a discharge control circuit;
is a resistor that constitutes a discharge and time constant, 3 is a constant current source, 4 is a capacitor, 5 is a transistor for detecting capacitor terminal voltage, 6 is a resistor, 7 is a voltage-current conversion amplifier, 8 is a deflection coil, 9 is a capacitor, 10 and 111 each represent a resistor, and 12 represents a potentiometer for supplying a DC component.
コンデンサ４は定電流源３によって充電されてゆき、例
えば垂直同期信号に対応してスイッチ・トランジスタ１
が所定期間（帰線期間）オンされ、コンデンサ４の電荷
は抵抗２を介して放電されて零となる。この動作が繰返
されるが、その間におけるコンデンサ４の端子電圧の変
化がトランジスタ５によって検出される。そして、重圧
−電流変換増幅器７を含むのこ糎゛り歯電流生成回路に
よって上記端子電圧がのこぎり歯電流に変換され、偏向
コイル８に供給される。即ちディスプレイ画面に対して
偏向を生じさせるようにする。このとき言うまでもなく
、表示画像の例えば上下刃向の中央部分がディスプレイ
画面の同じく中央部に位置することが望まれるが、装置
によっては必らずしも上記条件が満足されるとは限らな
い。このために、第１図図示ポテンシオメータ１２の如
く直流成分ヲ、偏向コイル８とコンデンサ９との接続点
に供給（７、表示画像の位置を上下方向に微調整するよ
うにするのしかし、このために、部品点数が犬となり、
消費電力が大となる。The capacitor 4 is charged by the constant current source 3, and the switch transistor 1 is charged in response to a vertical synchronizing signal, for example.
is turned on for a predetermined period (retrace period), and the charge in the capacitor 4 is discharged through the resistor 2 and becomes zero. This operation is repeated, and the change in the terminal voltage of the capacitor 4 during this period is detected by the transistor 5. Then, the terminal voltage is converted into a sawtooth current by a sawtooth current generation circuit including a heavy pressure-to-current conversion amplifier 7, and the sawtooth current is supplied to the deflection coil 8. In other words, a deflection is caused to the display screen. At this time, needless to say, it is desirable that the central portion of the displayed image, for example, in the upper and lower blade directions, be located at the same central portion of the display screen, but depending on the device, the above condition may not necessarily be satisfied. For this purpose, a DC component is supplied to the connection point between the deflection coil 8 and the capacitor 9, as shown in the potentiometer 12 in FIG. Therefore, the number of parts becomes a dog,
Power consumption becomes large.
（Ｃ） 発明の目的と構成
本発明は上記ポテンシオメータを省略可能に構成するこ
とを目的としており、本発明の偏向回路は、実質上の定
電流源から充電されるコンデンサと、該コンデンサの充
電電荷を同期信号に同期して放電せしめる放電制御回路
と、上記コンデンサの端子筒、王に対応［７てのこきり
歯電流を生成するのこきり歯電流生成１川路と、該のこ
ぎり歯電流生成回路からの出力によって励磁される偏向
コイルとを有するディスプレイ装置において、上記コン
デンサの充電電荷を放電せしめる放電制御回路に、放電
電流調整手段をもうけ、上記放電制御回路が作動してい
る間における上記充電電荷に対する放電特性を調整する
よう構成してなり、上記偏向コイルに流れるのこきり歯
電流の零レベルを調整するようにしたことを特徴として
いる。以丁図面を参照（７つつ説明する。(C) Object and Structure of the Invention The object of the present invention is to configure the potentiometer as described above so that it can be omitted, and the deflection circuit of the present invention includes a capacitor charged from a substantially constant current source and A discharge control circuit that discharges the charge in synchronization with a synchronization signal, a terminal tube of the capacitor, and a corresponding one [7 sawtooth current generation circuit that generates a sawtooth current 1 river path and the sawtooth current generation circuit] In a display device having a deflection coil excited by an output from a circuit, a discharge control circuit for discharging the charge of the capacitor is provided with a discharge current adjusting means, and the charge is controlled while the discharge control circuit is operating. It is characterized in that it is configured to adjust discharge characteristics with respect to electric charge, and that the zero level of the sawtooth current flowing through the deflection coil is adjusted. Please refer to the following drawings (explained in 7 steps).
（Ｄ） 発明の実施例
第２図は本発明の一実施例構成を示し、第３図は本発明
による動作を説明する説明図を示す。図中の符号１３な
いし１ｉＦｉ第１図に対応し、１３は本発明においても
うけられる可変抵抗を表噌）シ５ている。(D) Embodiment of the Invention FIG. 2 shows the configuration of an embodiment of the invention, and FIG. 3 shows an explanatory diagram for explaining the operation of the invention. The reference numerals 13 to 1iFi in the figure correspond to FIG. 1, and 13 represents a variable resistor provided in the present invention.
のこぎり歯電流が生成されて、偏向コイル８に供給され
る態様は第１図図示の場合と基本的にド１じであること
から、説明を重複させることを省略する。ただ第２図図
示の場合には、可変抵抗１３の抵抗値を選択することに
よって、第３図図示の同期信号の存在期間（帰線消去期
間）におＩ／）でコンデンサ４の端子電圧が零レベルに
なる速度７５（異なる形とがる。即ち抵抗１３の値が小
さい場合には図示実線の如くなり、抵抗１３の値が大き
い場合には図示点線の如くなる。したがって、図示実線
の場合について）・ツチングにて示した如く、−ヒ下の
ハツチング部分の面積が等しくなるような境界線Ａを考
えると、図示点線の場合における同様な境界線は図示線
Ｂの如くなる。このために、第３図図示の「端子電圧」
に対応して発生されて偏向コイル８に供給されるのこぎ
り歯電流の零レベルは上記境界線ＡやＢに対応して変化
し、実質上第１図においてポテンシオメータ１２によっ
て直流成分を供給したと同様な形となる。Since the manner in which the sawtooth current is generated and supplied to the deflection coil 8 is basically the same as in the case shown in FIG. 1, a repeated explanation will be omitted. However, in the case shown in FIG. 2, by selecting the resistance value of the variable resistor 13, the terminal voltage of the capacitor 4 at I/) during the existence period of the synchronizing signal (blanking period) shown in FIG. The speed at which the resistance reaches zero level 75 (takes different shapes. That is, when the value of the resistor 13 is small, it becomes like the solid line shown in the figure, and when the value of the resistor 13 is large, it becomes like the dotted line shown in the figure. Therefore, in the case of the solid line shown in the figure ) As shown in the hatching, if we consider a boundary line A in which the areas of the hatched portions under -H are equal, a similar boundary line in the case of the dotted line shown in the figure will be like the line B shown in the figure. For this purpose, the "terminal voltage" shown in Figure 3 is
The zero level of the sawtooth current generated in response to and supplied to the deflection coil 8 varies in accordance with the boundary lines A and B, and is substantially equivalent to the DC component supplied by the potentiometer 12 in FIG. It will have a similar shape.
（約 発明の詳細
な説明した如く、本発明によれば、可変抵抗１３を調整
することによって、表示画像の全体の位置を調整するこ
とが可能となる０このために第１図図示のボテ／ジオメ
ータ１２を省略することができる。なお蛇足ながら、第
３図図示の如く帰線期間の放電特性を変化させても、表
示画像には何んらの影響を与えないものである。(About As described in detail, according to the present invention, by adjusting the variable resistor 13, it is possible to adjust the entire position of the displayed image.) The geometer 12 can be omitted.However, even if the discharge characteristics during the blanking period are changed as shown in FIG. 3, the displayed image will not be affected in any way.
第１図は従来の偏向回路の一例、第２図は本発明の一実
施例構成、第３図は本発明による動作を説明する説明図
を示す。
図中、ｌは放電制御回路を構成するスイッチ・トランジ
スタ、３は定電流源、４はコンデンサ、５はコンデンサ
端子電圧検出用トランジスタ、７はのこぎり歯電流生成
回路を構成する電圧−電流変換増幅器、８は偏向コイル
、１３は放電電流調整手段を構成する可変抵抗を表わす
。
特許出願人 富士通株式会社FIG. 1 shows an example of a conventional deflection circuit, FIG. 2 shows the configuration of an embodiment of the present invention, and FIG. 3 shows an explanatory diagram for explaining the operation according to the present invention. In the figure, l is a switch transistor that constitutes a discharge control circuit, 3 is a constant current source, 4 is a capacitor, 5 is a capacitor terminal voltage detection transistor, 7 is a voltage-current conversion amplifier that constitutes a sawtooth current generation circuit, 8 represents a deflection coil, and 13 represents a variable resistor constituting a discharge current adjusting means. Patent applicant Fujitsu Limited
Claims (1)
デンサの充電電荷を同期信号に同期して放電せしめる放
電制御回路と、上記コンデンサの端子電圧に対応しての
こぎり両室流を生成するのこぎり両室流生成回路と、該
のこぎり両室流生成回路からの出力によって励磁される
偏向コイルとを有するディスプレイ装置において、上記
コンデンサの充電電荷を放電せしめる放電制御回路に、
放電電流調整手段をもうけ、上記放電制御回路が作動し
ている間における上記充電電荷に対する放電特性を調整
するよう構成してなり、上記偏向コイルに流れるのこぎ
り両室−の零レベルを調整するようにしたことを特徴と
する偏向回路。A capacitor charged from a substantially constant current source, a discharge control circuit that discharges the charge in the capacitor in synchronization with a synchronization signal, and a sawtooth double chamber current that generates a sawtooth double chamber current in response to the terminal voltage of the capacitor. In a display device having a chamber flow generation circuit and a deflection coil excited by an output from the sawtooth bichamber flow generation circuit, a discharge control circuit for discharging the charge of the capacitor,
A discharge current adjusting means is provided to adjust the discharge characteristic of the charged charge while the discharge control circuit is in operation, and is configured to adjust the zero level of the sawtooth chambers flowing through the deflection coil. A deflection circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5212182A JPS58169181A (en) | 1982-03-30 | 1982-03-30 | Deflection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5212182A JPS58169181A (en) | 1982-03-30 | 1982-03-30 | Deflection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58169181A true JPS58169181A (en) | 1983-10-05 |
Family
ID=12906037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5212182A Pending JPS58169181A (en) | 1982-03-30 | 1982-03-30 | Deflection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58169181A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62193372U (en) * | 1986-05-28 | 1987-12-09 |
-
1982
- 1982-03-30 JP JP5212182A patent/JPS58169181A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62193372U (en) * | 1986-05-28 | 1987-12-09 |
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