JPH05275024A - Cathode-ray tube - Google Patents
Cathode-ray tubeInfo
- Publication number
- JPH05275024A JPH05275024A JP6691892A JP6691892A JPH05275024A JP H05275024 A JPH05275024 A JP H05275024A JP 6691892 A JP6691892 A JP 6691892A JP 6691892 A JP6691892 A JP 6691892A JP H05275024 A JPH05275024 A JP H05275024A
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- grid
- ray tube
- electron
- heater
- 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.)
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- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、カラー映像表示に用い
る陰極線管に関し、特に結晶化ガラスまたはセラミック
等の電気絶縁物を介して陰極を支持する構造の陰極支持
構体の固定方法に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube used for color image display, and more particularly to a method for fixing a cathode supporting structure having a structure in which a cathode is supported through an electric insulator such as crystallized glass or ceramics. is there.
【０００２】[0002]
【従来の技術】カラー映像表示に用いる陰極線管（以下
カラーブラウン管という）は、映像スクリーンであるパ
ネル部，電子銃を収容するネック部，およびパネル部と
ネック部を連結するファンネル部とから構成され、上記
ファンネル部分には電子銃から発射された電子ビームを
パネル内面に塗布形成された蛍光面上を走査させる偏向
装置が装着される。2. Description of the Related Art A cathode ray tube used for displaying a color image (hereinafter referred to as a color cathode ray tube) is composed of a panel portion which is an image screen, a neck portion which houses an electron gun, and a funnel portion which connects the panel portion and the neck portion. A deflection device for scanning an electron beam emitted from an electron gun on a phosphor screen formed by coating on the inner surface of the panel is attached to the funnel portion.
【０００３】上記ネック部内に収容される電子銃は、カ
ソード電極，制御電極，集束電極，加速電極等の各種の
電極を備え、カソード電極からの電子ビームを制御電極
に印加される信号で変調し、集束電極，加速電極を通し
て所要の断面形状とエネルギーを付与して、上記蛍光面
に射突させる。電子ビームは、電子銃から蛍光面に達す
る途上において、ファンネル部に設けた前記偏向装置に
より、ファンネル部に設けた前記偏向装置により、水平
方向，垂直方向の偏向を受けることで、蛍光面上に映像
を形成するものである（特開昭５９−２１５６４０号公
報)。The electron gun housed in the neck portion is provided with various electrodes such as a cathode electrode, a control electrode, a focusing electrode and an accelerating electrode, and an electron beam from the cathode electrode is modulated by a signal applied to the control electrode. A desired cross-sectional shape and energy are applied through the focusing electrode and the accelerating electrode, and the fluorescent surface is bombarded. On the way from the electron gun to the phosphor screen, the electron beam is deflected in the horizontal direction and the vertical direction by the deflecting device provided in the funnel portion, and is deflected in the horizontal and vertical directions by the deflecting device provided in the funnel portion. It forms an image (Japanese Patent Laid-Open No. 59-215640).
【０００４】図２は本発明が係わるカラーブラウン管の
概略構成図であって、１はパネル、２はファンネル、３
はネック部、４は蛍光面（画面)、５はシャドウマス
ク、６は磁気シールド、７は偏向ヨーク、８はピュリテ
ィ調整マグネット、９はセンタービームスタティックコ
ンバーゼンス調整マグネット、１０はサイドビームスタ
ティックコンバーゼンス調整マグネット、１１は電子
銃、またＢｃはセンタービーム、Ｂｓはサイドビームで
ある。FIG. 2 is a schematic diagram of a color cathode ray tube according to the present invention, in which 1 is a panel, 2 is a funnel, and 3 is a funnel.
Is a neck portion, 4 is a fluorescent screen (screen), 5 is a shadow mask, 6 is a magnetic shield, 7 is a deflection yoke, 8 is a purity adjusting magnet, 9 is a center beam static convergence adjusting magnet, and 10 is a side beam static convergence adjusting magnet. , 11 are electron guns, Bc is a center beam, and Bs is a side beam.
【０００５】このようなカラーブラウン管のコンバーゼ
ンス調整（スタティックコンバーゼンス）は、まず２本
のサイドビームＢｓ，Ｂｓのコンバーゼンスを調整した
後、センタービームＢｃと上記サイドビームＢｓのコン
バーゼンス点とを集中させるようにしている。In the convergence adjustment (static convergence) of such a color cathode ray tube, first, after adjusting the convergence of the two side beams Bs, Bs, the center beam Bc and the convergence point of the side beam Bs are concentrated. ing.
【０００６】また、パネル１の外表面には、必要により
反射、帯電を防止する例えばＳｎＯ2，Ｉｎ2Ｏ3等を含
む薄膜が一層又は多層に形成されている。さらに図示し
ないがファンネル２，ネック３の内表面には黒鉛などか
らなる内装導電膜が被着されており、導電膜としてはア
ーク抑制を目的として黒鉛に加えて二酸化チタン等を含
み抵抗値を制御している。なお、この導電膜は高圧端子
（図示せず）と電子銃１１とを電気的に接続している。On the outer surface of the panel 1, a thin film containing SnO 2 , In 2 O 3 or the like for preventing reflection and electrification is formed in a single layer or a multi-layer if necessary. Although not shown, an inner conductive film made of graphite or the like is deposited on the inner surfaces of the funnel 2 and the neck 3. The conductive film contains titanium dioxide, etc. in addition to graphite to control the resistance value for the purpose of arc suppression. is doing. The conductive film electrically connects a high voltage terminal (not shown) to the electron gun 11.
【０００７】電子銃１１の軸方向に陰極２３に遠い側か
ら、例えば第６格子，第５格子，第４格子，第３格子，
第２格子２６，第１格子２１，陰極支持構体２２を配
し、これらの各電極の一部をマルチフォームガラス２５
に埋設し固定していた。From the side distant from the cathode 23 in the axial direction of the electron gun 11, for example, a sixth lattice, a fifth lattice, a fourth lattice, a third lattice,
The second grid 26, the first grid 21, and the cathode support structure 22 are arranged, and a part of each of these electrodes is covered with the multi-form glass 25.
It was buried and fixed in.
【０００８】図３は電子銃１１のうち、第１格子２１，
陰極２３および陰極支持構体３２近傍を説明するための
拡大断面図である。FIG. 3 shows the first grating 21 of the electron gun 11,
FIG. 6 is an enlarged cross-sectional view for explaining the vicinity of a cathode 23 and a cathode support structure 32.
【０００９】第１〜６格子および金属製ビードサポート
３３をマルチフォームガラス２５に埋設する。これとは
別個に、円筒状あるいは楕円筒状（三電子銃タイプカラ
ーブラウン管の場合は、この長軸上に３個の電子銃を並
べる構造をとる）の金属製外枠３２ｃの中へ陰極挿入用
パイプ３２ｂを、電気絶縁物３２ａを用いて固着する。
金属製外枠３２ｃとしては、ニッケル・鉄系軟質ガラス
用封着合金を、電気絶縁物３２ａには加熱溶融固化させ
た低融点結晶化粉末硬質ガラスを、陰極挿入用パイプ３
２ｂには鉄・ニッケル・コバルト系硬質ガラス用封着合
金を採用することができる。この様に金属製外枠３２中
に陰極挿入用パイプ３２ｂを固着したものを、マルチフ
ォームガラス２５に埋設されたビードサポート３３へ挿
入溶接固定する。次に、その陰極挿入用パイプ３２ｂの
中へ、その先端に電子放射性物質（図示せず）が被着さ
れた陰極２３を挿入し、第１格子２１−陰極２３間間隔
ｔを所望の値（例えば０.１５mm）に設定し陰極２３の
下端部を陰極挿入用パイプ３２ｂの下端部に溶接固定す
る。The first to sixth lattices and the metal bead support 33 are embedded in the multi-form glass 25. Separately from this, the cathode is inserted into the metal outer frame 32c having a cylindrical shape or an elliptic cylinder shape (in the case of a three electron gun type color cathode ray tube, three electron guns are arranged on the long axis). The pipe 32b is fixed by using the electrical insulator 32a.
The metal outer frame 32c is a nickel / iron based soft glass sealing alloy, and the electrical insulator 32a is a low melting point crystallized powder hard glass which is melted and solidified by heating.
An iron / nickel / cobalt-based hard glass sealing alloy can be used for 2b. In this way, the cathode insertion pipe 32b fixed to the metal outer frame 32 is inserted and fixed to the bead support 33 embedded in the multi-form glass 25 by welding. Next, the cathode 23 having an electron emissive material (not shown) attached to its tip is inserted into the cathode insertion pipe 32b, and the first lattice 21-cathode 23 interval t is set to a desired value ( For example, the lower end of the cathode 23 is fixed to the lower end of the cathode insertion pipe 32b by welding.
【００１０】[0010]
【発明が解決しようとする課題】従来の、第１格子と陰
極支持構体固定用電極とが分離独立して配置された構造
では、陰極加熱ヒータを点火した時点の温度上昇が第１
格子よりも陰極支持構体の方が早いため、陰極支持構体
の熱膨張がマルチフォームガラスを押し広げ、マルチフ
ォームガラスを介して第１格子に曲げモーメントを与え
る引張力が加わった。このためヒータ点火の回数が増す
につれ第１格子が変形し、電子放射量に多大な影響を及
ぼす第１格子−陰極間の間隔が所定値から外れ、これが
Ｒ，Ｇ，Ｂ電子銃間で異なるときは画像色調が変化する
という問題があった。In the conventional structure in which the first grid and the electrode for fixing the cathode support structure are separately arranged, the temperature rise at the time of ignition of the cathode heater is the first.
Since the cathode support structure is faster than the grid, the thermal expansion of the cathode support structure spreads out the multi-form glass and a tensile force is applied through the multi-form glass to give a bending moment to the first grid. Therefore, as the number of times the heater is ignited increases, the first lattice is deformed, and the distance between the first lattice and the cathode, which has a large effect on the amount of electron emission, deviates from a predetermined value, which is different among R, G, and B electron guns. Then, there was a problem that the image color tone changed.
【００１１】また、上記構造の場合、ヒータ点火時点に
限らず、ヒータ点火中も又、陰極支持構体と第１格子の
温度差に起因する応力が第１格子に加わり、変形を増大
させる恐れもあった。Further, in the case of the above structure, the stress caused by the temperature difference between the cathode support structure and the first lattice is applied to the first lattice not only at the time of heater ignition but also during the heater ignition, which may increase the deformation. there were.
【００１２】本発明は上記のような問題が生じないよう
にした陰極線管を提供することを目的とする。An object of the present invention is to provide a cathode ray tube in which the above problems do not occur.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に本発明においては、第１格子に対する間隔が精密に保
持されなければならない陰極を支持する陰極支持構体
を、第１格子に固定する構造とした。In order to achieve the above object, in the present invention, a structure for fixing a cathode supporting structure for supporting a cathode, whose distance to the first grid must be precisely maintained, to the first grid. And
【００１４】[0014]
【作用】前記本発明の構造によると、陰極支持構体が第
１格子に固定されたため、ヒータ点火時点でマルチフォ
ームガラスを押し広げることによって生じる曲げ応力が
第１格子に加わることがなくなった。また、ヒータ点火
中も陰極支持構体と第１格子の温度差が小さくなり第１
格子に加わる引張力も小さくなった。According to the structure of the present invention, since the cathode support structure is fixed to the first lattice, bending stress generated by expanding the multi-form glass at the time of ignition of the heater is not applied to the first lattice. In addition, the temperature difference between the cathode support structure and the first grid becomes small during the ignition of the heater, and
The tensile force applied to the grid was also reduced.
【００１５】この結果、ビーム電流の変動、カットオフ
電圧変動による画質劣化を解消することができる。As a result, it is possible to eliminate the deterioration of the image quality due to the fluctuation of the beam current and the fluctuation of the cutoff voltage.
【００１６】[0016]
【実施例】本発明の一実施例を以下図面を用いて説明す
る。図１は本発明実施例の要部断面図である。２１は第
１格子、２２は陰極支持構体、２２ａは絶縁および固着
を目的とする結晶化ガラスまたはセラミックであり、２
２ｃはニッケル・鉄系軟質ガラス用封着合金からなる金
属製外枠、２２ｂは鉄・ニッケル・コバルト系硬質ガラ
ス用封着合金からなる陰極挿入用パイプであり、上記金
属製外枠２２ｃ中に、陰極挿入用パイプは例えば結晶化
ガラス２２ａにより固着される。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an essential part of an embodiment of the present invention. Reference numeral 21 is a first lattice, 22 is a cathode support structure, 22a is crystallized glass or ceramic for the purpose of insulation and fixation, and 2a
Reference numeral 2c is a metal outer frame made of a nickel / iron based soft glass sealing alloy, and 22b is a cathode insertion pipe made of an iron / nickel / cobalt hard glass sealing alloy. The pipe for inserting the cathode is fixed by, for example, crystallized glass 22a.
【００１７】一方、図１に示す如く、金属製外枠２２ｃ
を滑動自在に挿入出来る部分を備えるアウターサポート
２６を第１格子２１に溶接固定したものをその他の電極
とともに所定間隔をもたせて配置しマルチフォームガラ
ス２５に埋設する。次に陰極挿入用パイプ２２ｂが固着
されている金属製外枠２２ｃを前記アウターサポート２
６に挿入し溶接固定する。さらに、この陰極挿入用パイ
プ２２ｂに陰極２３を挿入し第１格子２１−陰極２３間
間隔ｔを所望の値（例えば０.１５mm）に設定した状態
で陰極２３の下端部を陰極挿入用パイプ２２ｂの下端部
に溶接し固定する。On the other hand, as shown in FIG. 1, a metal outer frame 22c
An outer support 26 having a portion that can be slidably inserted is fixed to the first grid 21 by welding, and the outer support 26 and other electrodes are arranged at a predetermined interval and embedded in the multi-form glass 25. Next, the metal outer frame 22c to which the cathode insertion pipe 22b is fixed is attached to the outer support 2
Insert into No. 6 and fix by welding. Further, the cathode 23 is inserted into the cathode insertion pipe 22b, and the lower end portion of the cathode 23 is set to a desired value (for example, 0.15 mm) with the first grid 21-cathode 23 interval t set to the cathode insertion pipe 22b. Weld it to the lower end of and fix it.
【００１８】なお、上記構成において、手順を変えて第
１格子２１をマルチフォームガラス２５へ埋設する前
に、陰極挿入用パイプ２２ｂが固着されている金属製外
枠２２ｃを第１格子電極２１に溶接固定しておいても良
いことは勿論である。In the above structure, the metal outer frame 22c to which the cathode insertion pipe 22b is fixed is attached to the first grid electrode 21 before the first grid 21 is embedded in the multi-form glass 25 by changing the procedure. Of course, it may be fixed by welding.
【００１９】ヒータ２４は、陰極挿入用パイプ２２ｂに
陰極２３を挿入し溶接固定後、陰極２３内に挿入し、マ
ルチフォームガラス２５に埋設されているヒータ支持体
（図示せず）に溶接固定する。In the heater 24, after the cathode 23 is inserted into the cathode insertion pipe 22b and fixed by welding, it is inserted into the cathode 23 and fixed by welding to a heater support (not shown) embedded in the multi-form glass 25. ..
【００２０】本発明を実施するためには、第１格子２１
に、２６のような陰極支持構体固定用の部分を形成する
必要はあるが、この部分は、第１格子製造時に比較的簡
単に形成できる。この他の部品については何らの変更も
必要ではなく、従来仕様のものがそのまま使用可能であ
る。部品点数に関しては、従来電子銃構造で必要とした
陰極支持構体３２をマルチフォームガラスに固定するた
めの部品が不要となるなどの経済性にもすぐれる。In order to carry out the present invention, the first grating 21
First, it is necessary to form a portion such as 26 for fixing the cathode supporting structure, but this portion can be formed relatively easily when manufacturing the first grid. No other changes are necessary for the other parts, and the conventional specifications can be used as they are. With regard to the number of parts, it is also economically advantageous in that a part for fixing the cathode support structure 32 to the multi-form glass, which is required in the conventional electron gun structure, is unnecessary.
【００２１】なお、上記実施例においては、金属製外枠
２２ｃに陰極挿入用パイプ２２ｂを固着する際、結晶化
ガラス２２を使用したが、これに代えて、セラミックを
用いることも出来る。In the above embodiment, the crystallized glass 22 is used when the cathode insertion pipe 22b is fixed to the metal outer frame 22c, but ceramics may be used instead.
【００２２】この場合は、セラミックの外径が金属製外
枠２２ｃの内径より小さく、且つその内径が陰極挿入用
パイプ２２ｂの外径より大きいリング状のセラミック
を、金属製外枠２２ｃの中に挿入し、そのリング状セラ
ミックの内径に陰極挿入用パイプ２２ｂを挿入し、リン
グ状セラミックの外径と金属製外枠２２ｃの内径との
間、およびリング状セラミックの内径と陰極挿入用パイ
プの外径との間を、ガラスで接着することにより、陰極
挿入用パイプ２２ｂを金属製外枠２２ｃの中に固着する
ことが出来る。In this case, a ring-shaped ceramic whose outer diameter is smaller than the inner diameter of the metal outer frame 22c and whose inner diameter is larger than the outer diameter of the cathode insertion pipe 22b is placed in the metal outer frame 22c. Then, the cathode insertion pipe 22b is inserted into the inner diameter of the ring-shaped ceramic, between the outer diameter of the ring-shaped ceramic and the inner diameter of the metal outer frame 22c, and between the inner diameter of the ring-shaped ceramic and the outer portion of the cathode insertion pipe. The cathode insertion pipe 22b can be fixed in the metallic outer frame 22c by adhering the space between them with glass.
【００２３】以上の説明においては、第１格子２１に対
向する陰極２３が単一として説明したが、実際のカラー
ブラウン管においては、緑色信号，赤色信号，青色信号
に対応する３本の電子銃が一平面内に配列されているの
が通常である。In the above description, the single cathode 23 facing the first grating 21 was described, but in an actual color CRT, three electron guns corresponding to green signals, red signals and blue signals are provided. It is usually arranged in one plane.
【００２４】[0024]
【発明の効果】以上説明したように、本発明の電子銃構
造によれば、ヒータ点火時点の陰極支持構体の熱膨張に
よる第１格子の変形が防止できるので、陰極と第１格子
との間の間隔が変化することがなくなる。このため、当
初設定した青色，緑色，赤色電子銃間の電子ビーム放射
量バランスが変化することなく長時間にわたって色調の
良い画像を維持する効果が得られる。As described above, according to the electron gun structure of the present invention, the deformation of the first lattice due to the thermal expansion of the cathode support structure at the time of heater ignition can be prevented, so that the space between the cathode and the first lattice can be prevented. The interval of will not change. Therefore, the effect of maintaining an image with good color tone for a long time can be obtained without changing the electron beam radiation amount balance among the initially set blue, green, and red electron guns.
【００２５】また、部品点数が減り経済的にもすぐれた
効果が得られる。Further, since the number of parts is reduced, an excellent effect can be obtained economically.
【図１】本発明の陰極線管の一実施例の要部断面図であ
る。FIG. 1 is a sectional view of an essential part of an embodiment of a cathode ray tube of the present invention.
【図２】本発明が係わる陰極線管の断面図である。FIG. 2 is a sectional view of a cathode ray tube according to the present invention.
【図３】従来の陰極線管の要部断面図である。FIG. 3 is a sectional view of a main part of a conventional cathode ray tube.
２１・・・第１格子、２２・・・陰極支持構体、２２ａ
・・・電気絶縁物、２２ｂ・・・陰極挿入用パイプ、２
２ｃ・・・金属製外枠、２３・・・陰極、２４・・・ヒ
ータ、２５・・・マルチフォームガラス、２６・・・ア
ウターサポート。21 ... First grid, 22 ... Cathode support structure, 22a
... Electrical insulator, 22b ... Cathode insertion pipe, 2
2c ... Metal outer frame, 23 ... Cathode, 24 ... Heater, 25 ... Multifoam glass, 26 ... Outer support.
Claims (1)
相互間を連結しているファンネル部とからなる排気され
た外囲器を含み、上記フェースプレートの内表面に蛍光
体のスクリーンが形成され、上記ネック部に電子ビーム
を発生させて上記スクリーンに向けて投射するための電
子銃が装荷され、また上記ネック部とファンネル部との
接合部付近に上記各電子ビームを水平と垂直の両方向に
偏向させて上記スクリーン上に走査ラスタを描かせるた
めの偏向磁界領域が設定されるように構成されている陰
極線管において、結晶化ガラスまたはセラミック等の電
気絶縁物を介して陰極を支持する構造の陰極支持構体
を、第１格子に固定したことを特徴とする陰極線管。1. An exhausted envelope comprising a face plate and a neck portion and a funnel portion connecting the face plate and the neck portion to each other, wherein a phosphor screen is formed on an inner surface of the face plate. An electron gun for generating an electron beam at the neck portion and projecting it toward the screen is loaded, and the electron beams are deflected in both horizontal and vertical directions near the joint between the neck portion and the funnel portion. In a cathode ray tube configured to set a deflection magnetic field region for drawing a scanning raster on the screen, a cathode support having a structure for supporting the cathode through an electrically insulating material such as crystallized glass or ceramics. A cathode ray tube, wherein the structure is fixed to the first lattice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6691892A JPH05275024A (en) | 1992-03-25 | 1992-03-25 | Cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6691892A JPH05275024A (en) | 1992-03-25 | 1992-03-25 | Cathode-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05275024A true JPH05275024A (en) | 1993-10-22 |
Family
ID=13329841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6691892A Pending JPH05275024A (en) | 1992-03-25 | 1992-03-25 | Cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05275024A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020047010A (en) * | 2000-12-15 | 2002-06-21 | 가나이 쓰도무 | Cathode ray tube having an improved indirectly heated cathode |
-
1992
- 1992-03-25 JP JP6691892A patent/JPH05275024A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020047010A (en) * | 2000-12-15 | 2002-06-21 | 가나이 쓰도무 | Cathode ray tube having an improved indirectly heated cathode |
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