JPS60221933A - Braun tube - Google Patents

Braun tube

Info

Publication number
JPS60221933A
JPS60221933A JP6055585A JP6055585A JPS60221933A JP S60221933 A JPS60221933 A JP S60221933A JP 6055585 A JP6055585 A JP 6055585A JP 6055585 A JP6055585 A JP 6055585A JP S60221933 A JPS60221933 A JP S60221933A
Authority
JP
Japan
Prior art keywords
focusing
temperature
permanent magnet
cathode ray
temperature sensor
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
Application number
JP6055585A
Other languages
Japanese (ja)
Inventor
Yoshihiko Miyata
宮田　嘉彦
Kyohei Fukuda
京平 福田
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6055585A priority Critical patent/JPS60221933A/en
Publication of JPS60221933A publication Critical patent/JPS60221933A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only

Landscapes

  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To improve the focusing characteristic by detecting the temperature of a permanent magnet through a temperature sensor and controlling the output of a focusing voltage power source on the basis of the detected signal. CONSTITUTION:Upon increase of the temperature of a permanent magnet 2 to weaken the magnetic field of said magnet 2 thus to weaken the electromagnetic focusing lens function, the temperature rise of said magnet 2 is detected through a temperature sensor 3 to control the focusing voltage power source 4 through a control terminal 41 thus to lower the voltage at the output terminal 42 and to function to strengthen the electrostatic focusing lens. Consequently, the total focusing characteristic of the electrostatic focusing and the magnetic focusing is maintained constant resulting in best focusing condition.

Description

【発明の詳細な説明】 本発明はブラウン管装置の改良に関するものでおる。[Detailed description of the invention] The present invention relates to improvements in cathode ray tube devices.

周矧の如く、ブラウン管装置はブラウン管に内蔵された
電子銃より発射され７を電子ビームを電磁集束および静
′［イ集束させてブラウン管のスクリーン上に導いてい
る。本昂出願人は特願昭５１−１０３６３０号として、
前記電磁集束および静電集束を永久磁石によって併用し
たブラウン管装置を提供した。しかしながら、永久磁石
はその温度によって磁界の強さが変るものが多い。そこ
で、電磁集束と静電集束とを総合した集束特性金一定に
するには、永久磁石の周囲温度を一定にするか、または
永久磁石に強さ可変の碕惜を設ける必要がある。しかし
、前者の方法はセットが複雑で高価になるので、一般家
庭用のブラウン管には実用性がない。甘だ後者の方法は
９１作中における温度変化の都度調整する必要があるの
で、現実的でない。As usual, a cathode ray tube device emits an electron beam from an electron gun built into the cathode ray tube, electromagnetically and statically focuses the electron beam, and guides it onto the screen of the cathode ray tube. The present applicant filed the patent application No. 51-103630,
The present invention provides a cathode ray tube device that combines the electromagnetic focusing and electrostatic focusing using permanent magnets. However, in many permanent magnets, the strength of the magnetic field changes depending on the temperature. Therefore, in order to maintain a constant focusing characteristic that combines electromagnetic focusing and electrostatic focusing, it is necessary to keep the ambient temperature of the permanent magnet constant or to provide the permanent magnet with a hole whose strength can be varied. However, the former method requires a complex and expensive set-up, so it is not practical for general home cathode ray tubes. The latter method is unrealistic because it requires adjustment every time the temperature changes during the 91 productions.

本発明は上記従来技術の欠点に鑑み力されたもので、容
易に最良の集束状塵を保つことができるブラウン管装置
を提供することを目的とする。The present invention has been developed in view of the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a cathode ray tube device that can easily maintain the best focused dust.

以下、本発明を図示の実施例によシ説明する。Hereinafter, the present invention will be explained with reference to illustrated embodiments.

図は本発明の一実施例を示す概略説明図である。The figure is a schematic explanatory diagram showing one embodiment of the present invention.

ｌはブラウン管本体で、そのネック＋ｆｌｌ　ｌ　Ｉの
中には静電真束電極！、ｌｆａ　＋１２に接続された静
電集尿電極を含む電子銃（図示せず）を内蔵している。l is the main body of the cathode ray tube, and inside the neck +fll l is an electrostatic true flux electrode! , lfa +12, including an electrostatic urine collection electrode (not shown).

２は電磁集束レンズ磁界発生用の永久磁石、３は永久磁
石２の温度を検出するサーミスタなどの温度センサーで
ある。４は静電集尿電極に集束電圧を加えるための集束
電圧電源で、制御−子４１に温度セン廿−３で＋（Ｎ出
Ｉまた信号が加えられ、出力端子４２よシ出力電圧を静
電集束電極端子１２に加えられるようになっている。な
お、５は偏向コイルである。2 is a permanent magnet for generating an electromagnetic focusing lens magnetic field, and 3 is a temperature sensor such as a thermistor for detecting the temperature of the permanent magnet 2. 4 is a focused voltage power source for applying a focused voltage to the electrostatic urine collection electrode, and a signal is applied to the control terminal 41 at the temperature sensor 3 and the output voltage is statically output from the output terminal 42. It is adapted to be applied to the current focusing electrode terminal 12. Note that 5 is a deflection coil.

そこで、永久磁石２の湿層が上昇し、永久磁石２による
磁界が弱まり、電磁集束レンズ作用が弱くなった場合は
、永久磁石２の６゛１人度上昇を温度センサー３で検出
し、制御Ｘｆａ子４１により呆束電圧’＋Ｉｆ　ｙｌス
４を制御して出力ｙＬｌｌｉ子４２の電圧を下げ、静゛
【）℃県東レンズを強くするようにゴシリ作する。これ
により静電集束と電磁集尿をＫＢ合した集束特性を一定
として最良集束状態を保つことができる。Therefore, if the wet layer of the permanent magnet 2 rises, the magnetic field by the permanent magnet 2 weakens, and the electromagnetic focusing lens effect weakens, the temperature sensor 3 detects a 6.1 degree rise in the permanent magnet 2 and controls the temperature. The flux voltage '+If yl 4 is controlled by the Xfa element 41 to lower the voltage of the output yLlli element 42, so as to strengthen the static lens. As a result, the best focusing state can be maintained by keeping the focusing characteristic, which is the combination of electrostatic focusing and electromagnetic urine collection, constant.

以上の説明から明らかな如く、本発明になるブラウン管
装置によれば、永久磁石の温度を温度センサーによって
検出し、その検出信号によって集束電圧電源の出力を制
御する簡単な（４輩によシ、集束特性を向士させること
ができる。As is clear from the above description, according to the cathode ray tube device according to the present invention, the temperature of the permanent magnet is detected by the temperature sensor, and the output of the focused voltage power source is controlled by the detection signal. Focusing characteristics can be improved.

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

図は本発明になるブラウン管装置の一実施例を示す概略
説明図である。 ｌ・・・・ブラウン管本体、１１曲ネック部、１２・・
・・静電集束電極端子、２・・・・永久磁石、３曲温度
センサー、４曲集束電圧電源、４１　曲制御端子、４２
・・・・出力端子。The figure is a schematic explanatory diagram showing an embodiment of the cathode ray tube device according to the present invention. l... Braun tube body, 11-track neck section, 12...
... Electrostatic focusing electrode terminal, 2... Permanent magnet, 3-track temperature sensor, 4-track focusing voltage power supply, 41 Track control terminal, 42
...output terminal.

Claims (1)

【特許請求の範囲】[Claims] 電磁集束と静電集束を併用した永久磁石を備えたブラウ
ン管において、前記永久磁石の温度を検出する温度セン
サーと、ブラウン管のネック部に内蔵された静電集束′
ＬＪｉ極に集束電圧を加える集束電圧電源とを有し、前
記温度センサーの検出信号により前記集束電圧電源の出
力電圧を制御するように構成したブラウン管装置。In a cathode ray tube equipped with a permanent magnet that uses both electromagnetic and electrostatic focusing, there is a temperature sensor that detects the temperature of the permanent magnet, and an electrostatic focusing unit built into the neck of the cathode ray tube.
A cathode ray tube device comprising a focused voltage power source that applies a focused voltage to the LJi pole, and configured to control an output voltage of the focused voltage power source based on a detection signal from the temperature sensor.
JP6055585A 1985-03-27 1985-03-27 Braun tube Pending JPS60221933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6055585A JPS60221933A (en) 1985-03-27 1985-03-27 Braun tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6055585A JPS60221933A (en) 1985-03-27 1985-03-27 Braun tube

Publications (1)

Publication Number Publication Date
JPS60221933A true JPS60221933A (en) 1985-11-06

Family

ID=13145646

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6055585A Pending JPS60221933A (en) 1985-03-27 1985-03-27 Braun tube

Country Status (1)

Country Link
JP (1) JPS60221933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2027307B1 (en) * 2021-01-13 2022-07-25 Vdl Enabling Tech Group B V A charged particle lens assembly and a charged particle beam apparatus provided with such charged particle lens assembly.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4845133A (en) * 1971-07-17 1973-06-28
JPS5032565A (en) * 1973-07-26 1975-03-29
JPS5329656A (en) * 1976-09-01 1978-03-20 Hitachi Ltd Brown tube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4845133A (en) * 1971-07-17 1973-06-28
JPS5032565A (en) * 1973-07-26 1975-03-29
JPS5329656A (en) * 1976-09-01 1978-03-20 Hitachi Ltd Brown tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2027307B1 (en) * 2021-01-13 2022-07-25 Vdl Enabling Tech Group B V A charged particle lens assembly and a charged particle beam apparatus provided with such charged particle lens assembly.

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