JPS61112478A - Driving device of electromagnetic focusing type image pickup tube - Google Patents
Driving device of electromagnetic focusing type image pickup tubeInfo
- Publication number
- JPS61112478A JPS61112478A JP59233223A JP23322384A JPS61112478A JP S61112478 A JPS61112478 A JP S61112478A JP 59233223 A JP59233223 A JP 59233223A JP 23322384 A JP23322384 A JP 23322384A JP S61112478 A JPS61112478 A JP S61112478A
- Authority
- JP
- Japan
- Prior art keywords
- image pickup
- focusing
- pickup tube
- voltage
- circuit
- 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
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、電磁集束型撮像管の駆動装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a driving device for an electromagnetic focusing type image pickup tube.
（従来の技術）
撮像管を用いた撮像装置においては、ターゲツト面に集
束させた電子ビームによって、ターゲツト面が所定の走
査態様で走査されるようにするための駆動装置を備えて
いる。(Prior Art) An imaging apparatus using an image pickup tube is equipped with a drive device for causing a target surface to be scanned in a predetermined scanning manner by an electron beam focused on the target surface.
（発明が解決しようとする問題点）
ところで、電磁集束型の撮像管においては、ターゲット
上を走査する電子ビームの集束距離０と、偏向サイズｄ
とが、集束回路に与えられる高圧の変動分ΔＶの変化に
つれて、次のような関係で変化する。(Problems to be Solved by the Invention) By the way, in an electromagnetic focusing type image pickup tube, the focusing distance of the electron beam scanning the target is 0, and the deflection size d
changes in the following relationship as the fluctuation amount ΔV of the high voltage applied to the focusing circuit changes.
Δ患＝ΔＶ／２、 Δｄ＝１／ΔＶ
（ただし、Δａは集束距離の変動分、Δｄは偏向サイズ
の変動分である）
ところで、撮像管の動作用高圧供給回路から出力される
電圧は、一般に、電源変動、負荷変動、回路の温度特性
、その他の要因によって変動するが、電磁集束型の撮像
管においては、ターゲット上を走査する電子ビームの集
束距離悲と、偏向サイズｄとが、撮像管の動作用高圧供
給回路から集束回路に与えられる高−圧Ｖの変動分ΔＶ
によって前述の関係で変化するから、集束距離Ωは撮像
管の動作用高圧供給回路から出力される電圧Ｖの増加分
に対して１／２の割合いで増加し、また、偏向サイズｄ
は撮像管の動作用高圧供給回路から集束回路に与えられ
る高圧Ｖの増加分に対して１対１の割合いで減少する。ΔA = ΔV/2, Δd = 1/ΔV (However, Δa is the variation in the focusing distance, and Δd is the variation in the deflection size.) By the way, the voltage output from the high voltage supply circuit for operation of the image pickup tube is as follows. In general, it varies depending on power supply fluctuations, load fluctuations, temperature characteristics of the circuit, and other factors, but in an electromagnetic focusing type image pickup tube, the focusing distance of the electron beam scanning the target and the deflection size d are Fluctuation amount ΔV of high-pressure V given to the focusing circuit from the high-pressure supply circuit for pipe operation
Since the focusing distance Ω changes according to the above-mentioned relationship, the focusing distance Ω increases at a rate of 1/2 with respect to the increase in the voltage V output from the high-voltage supply circuit for operating the image pickup tube, and the deflection size d
decreases in a 1:1 ratio with respect to an increase in the high voltage V applied to the focusing circuit from the operating high voltage supply circuit of the image pickup tube.
したがって、電磁集束型撮像管の電子ビームの集束の状
態及び偏向のサイズは、撮像管の動作用高圧供給回路か
ら出力される電圧■の変動に応じて変化することになる
ので、それの改善が求められた。Therefore, the focusing state and deflection size of the electron beam of the electromagnetic focusing image pickup tube will change according to the fluctuation of the voltage output from the high voltage supply circuit for operating the image pickup tube, so it is necessary to improve this. I was asked.
（問題点を解決するための手段）
本発明は電磁集束型撮像管における集束用電流発生回路
の基準電圧を、撮像管の動作用高圧供給・回路からの出
力電圧を分圧して発生させる手段と、偏向波形の波高値
を前記した撮像管の動作用高圧供給回路からの出力電圧
を分圧して発生させた電圧によって制御する手段とを備
えてなる電磁集束型撮像管の駆動装置を提供するもので
ある。(Means for Solving the Problems) The present invention is a means for generating a reference voltage for a focusing current generation circuit in an electromagnetic focusing type image pickup tube by dividing the output voltage from a high voltage supply/circuit for operating the image pickup tube. and means for controlling the peak value of the deflection waveform by a voltage generated by dividing the output voltage from the above-mentioned high voltage supply circuit for operating the image pickup tube. It is.
（実施例）
以下、添付図面を参照して本発明の電磁集束型撮像管の
駆動装置の具体的な内容について説明する。添付図面は
撮像管が電磁集束静電偏向型のものであった場合におけ
る本発明の電磁集束型撮像管の駆動装置の一実施例のブ
ロック図であり、この図において、 ＰＴは電磁集束静
電偏向型の撮像管。(Example) Hereinafter, specific details of the electromagnetic focusing type image pickup tube driving device of the present invention will be described with reference to the accompanying drawings. The attached drawing is a block diagram of an embodiment of the driving device for an electromagnetic focusing type image pickup tube of the present invention when the image pickup tube is an electromagnetic focusing type electrostatic deflection type. Deflection type image pickup tube.
）ＩＴｓは撮像管の動作用高圧供給回路、ＶＤＣは分圧
回路、ＦＣは集束コイル、ＤＥは偏向電極、 ＦＣＣは
集束電流発生器、ＡＤＤは加算回路、ＤＩＩＧは偏向信
号発生器である。) ITs is a high voltage supply circuit for operating the image pickup tube, VDC is a voltage dividing circuit, FC is a focusing coil, DE is a deflection electrode, FCC is a focusing current generator, ADD is an adder circuit, and DIIG is a deflection signal generator.
撮像管の動作用高圧供給回路）ＩＴＧからの出力電圧は
、加算回路ＡＤＤと分圧回路ＶＤＣに供給されており、
前記の分圧回路ＶＤＣでは撮像管の動作用高圧供給回路
からの出力電圧をそれぞれ所定のように分圧して、前記
の分圧した電圧を集束電流発生器ＦＣＧと、偏向信号発
生器ＦＣＣとに供給する。(High voltage supply circuit for operating the image pickup tube) The output voltage from the ITG is supplied to the adder circuit ADD and the voltage divider circuit VDC.
The voltage dividing circuit VDC divides the output voltage from the high voltage supply circuit for operating the image pickup tube in a predetermined manner, and supplies the divided voltages to the focusing current generator FCG and the deflection signal generator FCC. supply
前記の集束電流発生器ＯＷＣ，には、定電圧源ＣｖＳと
接地との間に抵抗Ｒ２と可変抵抗器ＶＲｆとの直列接続
回路が構成されており、また、前記した抵抗Ｒ２と可変
抵抗器ＶＲｆとの接続点ａと分圧回路■ＤＣとの間には
、抵抗Ｒ１が接続されている。The focused current generator OWC has a series connection circuit of a resistor R2 and a variable resistor VRf between the constant voltage source CvS and the ground, and a series connection circuit of the resistor R2 and the variable resistor VRf. A resistor R1 is connected between the connection point a and the voltage dividing circuit (2) DC.
前記した可変抵抗器ＶＲｆの摺動子は、演算増幅器ＯＰ
Ａにおける非反転入力端子に接続されており。The slider of the variable resistor VRf described above is the operational amplifier OP.
It is connected to the non-inverting input terminal at A.
また、前記の演算増幅器ＯＰ＾における反転入力端子と
、出力端子との間には集束コイルＦＣが接続されている
他、演算増幅器ＯＰＡの反転入力端子は抵抗Ｒ３を介し
て接地されている。Further, a focusing coil FC is connected between the inverting input terminal and the output terminal of the operational amplifier OP^, and the inverting input terminal of the operational amplifier OPA is grounded via a resistor R3.
また、前記の分圧回路ｖＤＣで分圧された電圧は、偏向
信号発生器ＤＷＧの可変抵抗器Ｒｄの非接地側端子に接
続されており、可変抵抗器ＶＲｄの摺動子はトランジス
タＴｒｌのベースに接続されている。Further, the voltage divided by the voltage dividing circuit vDC is connected to the non-ground terminal of the variable resistor Rd of the deflection signal generator DWG, and the slider of the variable resistor VRd is connected to the base of the transistor Trl. It is connected to the.
トランジスタＴｒｉのコレクタは接地され、また、トラ
ンジスタＴｒｉのエミッタはトランジスタ丁ｒ２のベー
スに接続されているとともに、抵抗Ｒ５を介して動作用
電源Ｖｃｃに接続されている。トランジスタＴｒ２のエ
ミッタは抵抗Ｒ４を介して接地され、また、トランジス
タＴｒ２のコレクタはコンデンサＣを介して動作用電源
Ｖｃｃに接続されているとともに、トランジスタＴｒ３
のコレクタに接続されており、また、コンデンサＣａを
介して加算器ＡＤＤにも接続されている。The collector of the transistor Tri is grounded, and the emitter of the transistor Tri is connected to the base of the transistor R2 and to the operating power supply Vcc via a resistor R5. The emitter of the transistor Tr2 is grounded via a resistor R4, and the collector of the transistor Tr2 is connected to the operating power supply Vcc via a capacitor C.
It is also connected to the adder ADD via a capacitor Ca.
トランジスタＴｒ３のエミッタは動作用電源Ｖｃｃに接
続されており、また、トランジスタＴｒ３のベースには
、端子Ｔａからコンデンサｃｂと抵抗Ｒ６とを介して、
偏向周期のパルスが加えられている。The emitter of the transistor Tr3 is connected to the operating power supply Vcc, and the base of the transistor Tr3 is connected to a terminal Ta through a capacitor cb and a resistor R6.
A pulse with a deflection period is applied.
前記のように構成された本発明の電磁集束型撮像管の駆
動装置において、集束電流発生器ＦＣＧから発生された
集束電流が集束コイルＦＣに供給されることによって、
撮像管ＰＴの電子ビームに対する所定の電磁集束が行な
われ、また、偏向信号発生器ＤＶＧから発生された偏向
信号と、撮像管の動作用高圧供給回路ＨＴＧの出力電圧
とが加算器へ〇〇で加算されることによって得られた偏
向電圧が撮像管ＰＴの偏向電極ＤＨに供給されることに
よって、撮像管ＰＴの電子ビームに対する所定の偏向動
作が行なわれる。In the electromagnetic focusing image pickup tube drive device of the present invention configured as described above, the focusing current generated from the focusing current generator FCG is supplied to the focusing coil FC, so that:
A predetermined electromagnetic focusing is performed on the electron beam of the image pickup tube PT, and the deflection signal generated from the deflection signal generator DVG and the output voltage of the high voltage supply circuit HTG for operation of the image pickup tube are sent to the adder by 〇〇. By supplying the deflection voltage obtained by the addition to the deflection electrode DH of the image pickup tube PT, a predetermined deflection operation for the electron beam of the image pickup tube PT is performed.
ところで１本発明の電磁集束型撮像管の駆動装置は前述
のように構成されているから、それの集束電流発生器Ｆ
ＣＧにお番ブる可変抵抗器ＶＲｆに対する分圧回路ＶＤ
Ｃからの供給電圧によって電流１１が流れるように、ま
た、前記した電流１１の変動のｌ／２が、可変抵抗器Ｖ
Ｒｆの両端の電圧変動になるように固定抵抗Ｒ１，Ｒ２
を設定すると、集束電流の変化分は、撮像管の動作用高
圧供給回路の出力電圧変動の１７２になり、また１ｇ＆
向信号発生器［１１１Ｇから発生される偏向信号のピー
ク・ピーク値りは、次式、
ｈ＝（ｉ４／Ｃ）ｔ＝（Ｖｃ／Ｒ４）（ｔ／Ｃ）で示さ
れるように、定電流供給トランジスタＴｒ２に流れる電
流ｉ４で決定されるものになっているから、前記した分
圧回路ＶＤＣからの電流ｉ３を、偏向信号発生器ＤＷＧ
における偏向サイズ設定用の可変抵抗器ＶＲｄに供給し
、偏向サイズ設定用の可変抵抗器ＶＲｄの摺動子の調節
により、定電流供給トランジスタ丁ｒ２に流れる電流ｉ
４で所定のピーク・ピーク値りの偏向信号が得られるよ
うにすれば、撮像管の動作用高圧供給回路の出力電圧の
変動に対して、偏向信号発生器ＤすＧから発生される偏
向信号のピーク・ピーク値りが１対１に対応して変化す
るものとなり、電子ビームの偏向のサイズは安定化して
いるものになる。By the way, since the driving device for an electromagnetic focusing type image pickup tube according to the present invention is constructed as described above, its focusing current generator F
Voltage divider circuit VD for variable resistor VRf connected to CG
In such a way that the current 11 flows depending on the supply voltage from the variable resistor V
Fixed resistors R1 and R2 are installed so that the voltage across Rf fluctuates.
When set, the change in the focusing current is 172 of the output voltage fluctuation of the high voltage supply circuit for operating the image pickup tube, and 1g &
The peak-to-peak value of the deflection signal generated from the deflection signal generator [111G] is determined by the constant current Since it is determined by the current i4 flowing through the supply transistor Tr2, the current i3 from the voltage dividing circuit VDC described above is applied to the deflection signal generator DWG.
By adjusting the slider of the variable resistor VRd for setting the deflection size, the current i flowing through the constant current supply transistor R2 is supplied to the variable resistor VRd for setting the deflection size.
If a deflection signal with a predetermined peak-to-peak value is obtained in step 4, the deflection signal generated from the deflection signal generator DG will respond to fluctuations in the output voltage of the high-voltage supply circuit for operating the image pickup tube. The peak-to-peak values of the electron beams change on a one-to-one basis, and the size of the deflection of the electron beam is stabilized.
以上の説明は、電磁集束静電偏向型の撮像管に本発明電
磁集束型撮像管の駆動装置を適用した場合のものであっ
たが、本発明の電磁集束型撮像管の駆動装置は電磁集束
電磁偏向の撮像管についても良好に適用できることはい
うまでもない。The above explanation was for the case where the electromagnetic focusing image pickup tube driving device of the present invention is applied to an electromagnetic focusing electrostatic deflection type image pickup tube. Needless to say, the present invention can also be effectively applied to an electromagnetic deflection image pickup tube.
（効果）
以上、詳細に説明したところから明らかなように、本発
明の電磁集束型撮像管の駆動装置においては、電磁集束
型撮像管における集束用電流発生回路の基準電圧を、撮
像管の動作用高圧供給回路からの出力電圧を分圧して発
生させており、また偏向波形の波高値を前記した撮像管
の動作用高圧供給回路からの出力電圧を分圧して発生さ
せた電圧によって制御するようにしているから、撮像管
の動作用高圧供給回路からの出力電圧が変動しても、撮
像管の走査電子ビームの集束の状態と走査サイズとは自
動的に安定化されるのである。(Effects) As is clear from the above detailed explanation, in the electromagnetic focusing type image pickup tube driving device of the present invention, the reference voltage of the focusing current generating circuit in the electromagnetic focusing type image pickup tube is set to It is generated by dividing the output voltage from the high voltage supply circuit for operating the image pickup tube, and the peak value of the deflection waveform is controlled by the voltage generated by dividing the output voltage from the high voltage supply circuit for operating the image pickup tube. Therefore, even if the output voltage from the high-voltage supply circuit for operating the image pickup tube fluctuates, the focusing state and scanning size of the scanning electron beam of the image pickup tube are automatically stabilized.
添付図面は本発明の電磁集束型撮像管の駆動装置の一実
施例のブロック図である。
ＨＴＧ・・−撮像管の動作用高圧供給回路、ＡＤＤ・・
・加算器、ＰＴ・・・撮像管、ＤＥ・・・偏向電極、Ｆ
Ｃ・・・集束電極、ＶＤＣ・・・分圧回路、 ＦＣＧ・
・−集一丈電流発生器、ＤｖＧ・・−偏向信号発生器、
ＣＶＳ・・・定電圧電源、ＯＰＡ・・・演算増幅器、
ＶＲｆ 、 ＶＲｄ・・・可変抵抗器、 Ｔｒｉ〜Ｔｒ
３・・・トランジスタ、The accompanying drawing is a block diagram of an embodiment of a driving device for an electromagnetic focusing type image pickup tube according to the present invention. HTG... - High voltage supply circuit for image pickup tube operation, ADD...
・Adder, PT... image pickup tube, DE... deflection electrode, F
C...Focusing electrode, VDC...Voltage dividing circuit, FCG/
- Shuichijo current generator, DvG... - Deflection signal generator,
CVS...constant voltage power supply, OPA...operational amplifier,
VRf, VRd...variable resistor, Tri~Tr
3...transistor,
Claims (1)
圧を、撮像管の動作用高圧供給回路からの出力電圧を分
圧して発生させる手段と、偏向波形の波高値を前記した
撮像管の動作用高圧供給回路からの出力電圧を分圧して
発生させた電圧によって制御する手段とを備えてなる電
磁集束型撮像管の駆動装置means for generating a reference voltage for a focusing current generation circuit in an electromagnetic focusing image pickup tube by dividing the output voltage from a high voltage supply circuit for operation of the image pickup tube; A driving device for an electromagnetic focusing image pickup tube, comprising means for controlling the voltage generated by dividing the output voltage from the high voltage supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59233223A JPS61112478A (en) | 1984-11-07 | 1984-11-07 | Driving device of electromagnetic focusing type image pickup tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59233223A JPS61112478A (en) | 1984-11-07 | 1984-11-07 | Driving device of electromagnetic focusing type image pickup tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61112478A true JPS61112478A (en) | 1986-05-30 |
Family
ID=16951683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59233223A Pending JPS61112478A (en) | 1984-11-07 | 1984-11-07 | Driving device of electromagnetic focusing type image pickup tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61112478A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56125164A (en) * | 1980-02-08 | 1981-10-01 | Rca Corp | Power source and deflecting circuit with raster size correcting function |
| JPS5710161B2 (en) * | 1979-04-03 | 1982-02-25 | ||
| JPS57145253A (en) * | 1981-03-03 | 1982-09-08 | Sanyo Electric Co Ltd | Electron beam focusing device of crt |
| JPS58215870A (en) * | 1982-06-10 | 1983-12-15 | Toshiba Corp | Cathode ray tube device |
-
1984
- 1984-11-07 JP JP59233223A patent/JPS61112478A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710161B2 (en) * | 1979-04-03 | 1982-02-25 | ||
| JPS56125164A (en) * | 1980-02-08 | 1981-10-01 | Rca Corp | Power source and deflecting circuit with raster size correcting function |
| JPS57145253A (en) * | 1981-03-03 | 1982-09-08 | Sanyo Electric Co Ltd | Electron beam focusing device of crt |
| JPS58215870A (en) * | 1982-06-10 | 1983-12-15 | Toshiba Corp | Cathode ray tube device |
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