JPH08124498A - Electron gun for cathode-ray tube - Google Patents
Electron gun for cathode-ray tubeInfo
- Publication number
- JPH08124498A JPH08124498A JP26021394A JP26021394A JPH08124498A JP H08124498 A JPH08124498 A JP H08124498A JP 26021394 A JP26021394 A JP 26021394A JP 26021394 A JP26021394 A JP 26021394A JP H08124498 A JPH08124498 A JP H08124498A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- support
- electron gun
- electrodes
- ray tube
- 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
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明はブラウン管特に高電圧
が印加されるビデオプロジェクター用電子銃の耐電圧改
善に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube, and more particularly to improvement of withstand voltage of an electron gun for a video projector to which a high voltage is applied.
【0002】[0002]
【従来の技術】ビデオプロジェクター用ブラウン管には
高輝度、高解像化実現のため、非常に高い電圧(約32
kV)が印加されている。従って、当ブラウン管に組込
まれた電子銃にも高電圧が印加されるため、電子銃を構
成する電極間で放電したりリーク電流が流れたりして、
ブラウン管の特性を劣化させる事が多々発生していた。
図4は従来のビデオプロジェクター用ブラウン管に使用
していた電子銃の基本構造を図示したものである。2. Description of the Related Art A cathode ray tube for a video projector has an extremely high voltage (about 32
kV) is applied. Therefore, since a high voltage is applied to the electron gun incorporated in the cathode ray tube, discharge or leak current may occur between the electrodes forming the electron gun,
There were many cases where the characteristics of the cathode ray tube were deteriorated.
FIG. 4 illustrates the basic structure of an electron gun used in a conventional cathode ray tube for a video projector.
【0003】電子銃の電極構成はG1 電極11,G2 電
極12,G3 電極13,二分割されたG4 電極14a,
14b,G5 電極15がビードガラス2で保持されて、
これらから成る電子銃基体1と、その上部にシールドカ
ップ5及びブラウン管の高電圧を導き電子銃基体1をブ
ラウン管のネックガラス(図示していない)の中に保持
させる役割をするコンタクター6が設けられている。The electrode structure of the electron gun is as follows: G 1 electrode 11, G 2 electrode 12, G 3 electrode 13, G 4 electrode 14a divided into two parts,
14b, G 5 electrode 15 is held by the bead glass 2,
An electron gun base 1 made of these is provided, and a shield cup 5 and a contactor 6 for guiding the high voltage of the CRT and holding the electron gun base 1 in a neck glass (not shown) of the CRT. ing.
【0004】ところで電子銃基体1を構成する各電極に
は各々規定の電圧が印加される。本実施例ではG3 電極
13とG5 電極15はコネクター4により電気的に接続
されブラウン管に印加される高電圧(約32kV)が印
加されており、G4 電極14a,14bはフォーカス電
圧(約8kV)が印加される。従ってブラウン管動作時
に高電圧が印加されるG3 電極13,G5 電極15とフ
ォーカス電圧が印加されるG4 電極14a,14bとの
間で放電したりリーク電流が発生しブラウン管の特性を
劣化させていた。By the way, a prescribed voltage is applied to each electrode constituting the electron gun substrate 1. In this embodiment, the G 3 electrode 13 and the G 5 electrode 15 are electrically connected by the connector 4 and a high voltage (about 32 kV) applied to the cathode ray tube is applied, and the G 4 electrodes 14 a and 14 b are focused on the focus voltage (about 32 kV). 8 kV) is applied. Thus G 4 electrode 14a which G 3 electrode 13 to which a high voltage is applied during CRT operation, G 5 electrode 15 and the focus voltage is applied, a discharge or leak current to deteriorate the characteristics of the generated cathode ray tube between the 14b Was there.
【0005】図5はG5 電極15とG4 電極14b付近
の拡大図を示している。G5 電極15とG4 電極14b
には各々高電圧、フォーカス電圧が印加されるため対向
する先端部には各々の円筒状電極を構成するカール部8
を設けて電極部の突起部を設計的に無くしている。又両
電極間隔は真空中の耐圧特性を充分満足する間隔(例え
ば1.2mm以上)にしている。FIG. 5 is an enlarged view of the vicinity of the G 5 electrode 15 and the G 4 electrode 14b. G 5 electrode 15 and G 4 electrode 14b
Since a high voltage and a focus voltage are applied to each of them, the curl portions 8 forming the respective cylindrical electrodes are formed at the opposite tips.
Is provided to eliminate the protrusion of the electrode part by design. The distance between both electrodes is set to an interval (for example, 1.2 mm or more) that sufficiently satisfies the pressure resistance characteristic in vacuum.
【0006】[0006]
【発明が解決しようとする課題】図5に示したようにG
5 電極15,G4 電極14bは対向部にカール部8を設
けて耐圧対策を行っているが、各電極(円筒状電極)を
ビードガラス2で保持するための支持電極7a,7bは
図6に示したような形状のものであった。図6に示した
支持電極7は円筒電極を保持する役目をするもので、ビ
ードガラスへの立込部72,支持部71,円筒電極との
溶接部73から成るコ字状のものであった。Problems to be Solved by the Invention As shown in FIG.
The 5th electrode 15 and the G 4 electrode 14b are provided with a curl portion 8 at the facing portion to take a measure against withstand voltage. However, the supporting electrodes 7a and 7b for holding each electrode (cylindrical electrode) by the bead glass 2 are shown in FIG. The shape was as shown in. The supporting electrode 7 shown in FIG. 6 plays a role of holding the cylindrical electrode, and has a U-shape having a recessed portion 72 into the bead glass, a supporting portion 71, and a welded portion 73 with the cylindrical electrode. .
【0007】ところがコ字状の支持電極7は支持部7
1,溶接部73のプレス切断部のシャープエッジ,プレ
スのカエリ,突起等が図6のAに示すエッジ部に残り、
高電圧電極15に対向するフォーカス電極14a,14
bの支持電極7aが高電圧電極15と放電リークして耐
圧劣化の原因となっていた。However, the U-shaped support electrode 7 has the support portion 7
1, sharp edges of the press cut portion of the welded portion 73, press burrs, protrusions, etc. remain on the edge portion shown in FIG.
Focus electrodes 14a, 14 facing the high voltage electrode 15
The supporting electrode 7a of b is leaked to the high voltage electrode 15 due to discharge, which causes deterioration of withstand voltage.
【0008】この発明は上記のような耐圧劣化問題を解
決するためになされたものであり高輝度,高解像度のビ
デオプロジェクター用ブラウン管の特性劣化を防ぎ信頼
性を向上させる事を目的とする。The present invention has been made to solve the above-mentioned problem of withstand voltage deterioration, and an object of the present invention is to prevent deterioration of the characteristics of a CRT for a high-luminance, high-resolution video projector and improve its reliability.
【0009】[0009]
【課題を解決するための手段】請求項1に記載の発明に
よるブラウン管用電子銃は、電子銃を構成する複数の電
極と、底部と2つの支持部からなる略コの字型の形状を
なし複数の電極のそれぞれにその底部が固着された複数
の支持電極と、複数の支持電極の支持部の一部が埋設さ
れ、複数の電極を所定の位置に固定的に配設するビード
ガラスとを備え、複数の支持電極の支持部の少なくとも
1つは、その底部とビードガラスの間において隣接する
電極に対向する平坦部片を設けたものである。また、請
求項2に記載の発明によるブラウン管用電子銃は、請求
項1記載の発明において平坦部片は支持部の一部を折り
曲げて設けたものである。An electron gun for a cathode ray tube according to a first aspect of the present invention has a substantially U-shaped configuration including a plurality of electrodes constituting the electron gun, a bottom portion and two supporting portions. A plurality of support electrodes whose bottoms are fixed to each of the plurality of electrodes, and a bead glass in which a part of the support portions of the plurality of support electrodes are embedded and the plurality of electrodes are fixedly arranged at predetermined positions. At least one of the supporting portions of the plurality of supporting electrodes is provided with a flat portion piece facing the adjacent electrode between the bottom portion and the bead glass. Further, in the electron gun for a cathode ray tube according to the invention described in claim 2, in the invention described in claim 1, the flat piece is provided by bending a part of the support part.
【0010】また、請求項3に記載の発明によるブラウ
ン管用電子銃は、請求項1または2記載の発明におい
て、電子銃を構成する複数の電極は、円筒状の電極とし
たものである。また、請求項4に記載の発明によるブラ
ウン管用電子銃は、請求項1乃至3のいずれか記載の発
明において、高電圧が印加される電極に対向する低電圧
側電極に固着された支持電極の支持部に平坦部片を設け
たものである。また、請求項5に記載の発明によるブラ
ウン管用電子銃は、請求項1乃至4のいずれかに記載の
発明において、支持電極はプレス成形時に発生するプレ
スのかえりの方向が平坦部片の端部においては支持電極
の内側になるようにプレス成形されたものである。The cathode ray tube electron gun according to a third aspect of the present invention is the electron gun for a cathode ray tube according to the first or second aspect of the present invention, wherein the plurality of electrodes constituting the electron gun are cylindrical electrodes. An electron gun for a cathode ray tube according to a fourth aspect of the present invention is the electron gun for a cathode ray tube according to any one of the first to third aspects of the present invention, in which The support portion is provided with a flat piece. Further, in the electron gun for a cathode ray tube according to the invention described in claim 5, in the invention described in any one of claims 1 to 4, the supporting electrode has a flat burr direction in which a burr direction of the press generated at the time of press molding is flat. In the above, the press molding is performed so as to be inside the support electrode.
【0011】[0011]
【作用】請求項1に記載の発明によれば、支持電極の支
持部はその底部とビードガラスの間において隣接する電
極に対向する部分のエッジ部が減るので、支持電極と隣
接する電極間の放電リークの発生を防止する。請求項2
に記載の発明によれば、支持電極の隣接する電極に対向
するエッジ部がほとんど無くなるので、放電リークの発
生を大幅に防止する。請求項3に記載の発明によれば、
電子銃を構成する電極はエッジ部のない円筒状の電極と
したので、支持電極との間の放電リークの発生を防止す
る。According to the invention described in claim 1, since the edge portion of the portion of the supporting portion of the supporting electrode facing the adjacent electrode between the bottom portion and the bead glass is reduced, the supporting electrode and the adjacent electrode are separated from each other. Prevent the occurrence of discharge leakage. Claim 2
According to the invention described in (1), since the edge portion of the supporting electrode facing the adjacent electrode is almost eliminated, the occurrence of discharge leak is largely prevented. According to the invention of claim 3,
Since the electrode forming the electron gun is a cylindrical electrode having no edge portion, the occurrence of discharge leakage between the electrode and the supporting electrode is prevented.
【0012】請求項4に記載の発明によれば、支持電極
は放電リークの発生しやすい高電圧が印加される電極に
対向する低電圧側電極に固着された支持電極の支持部に
のみ平坦部片を設けるようにしたので、他の電極に固着
される支持電極には従来の支持電極を流用できる。請求
項5に記載の発明によれば、支持電極の支持部に設けた
平坦部片の端部ではプレス成形時に発生するプレスのか
えりは放電リークの発生を誘発しない方向になるので、
さらに効果的に放電リークの発生を防止する。According to the invention described in claim 4, the support electrode has a flat portion only on the support portion of the support electrode fixed to the low voltage side electrode facing the electrode to which a high voltage is apt to occur in discharge leakage. Since the piece is provided, the conventional support electrode can be used as the support electrode fixed to the other electrode. According to the invention described in claim 5, since the burr of the press generated at the time of press molding at the end of the flat part provided on the support part of the support electrode is in a direction that does not induce the occurrence of discharge leak,
Further, it effectively prevents the occurrence of discharge leak.
【0013】[0013]
実施例1 本発明の特徴とする支持電極の形状実施例を図1に示
す。本発明の特徴とする支持電極9はビードガラスへの
立込部92,支持部91に折り曲げ片94を設ける。コ
字状支持電極の底部の溶接部93は従来品と同じであ
る。支持電極9をプレス加工する際にはプレス加工方向
を展開図に対して一定の方向に打ち抜き、支持部91の
折り曲げ片94を曲げ加工し、最后に両支持部91をコ
字状に折り曲げ加工するものである。Example 1 FIG. 1 shows an example of the shape of a supporting electrode, which is a feature of the present invention. The support electrode 9 which is a feature of the present invention is provided with a bead glass stand-in portion 92 and a bent piece 94 on the support portion 91. The welding portion 93 at the bottom of the U-shaped support electrode is the same as the conventional product. When the supporting electrode 9 is pressed, the pressing direction is punched out in a fixed direction with respect to the developed view, the bending piece 94 of the supporting portion 91 is bent, and finally both supporting portions 91 are bent into a U shape. To do.
【0014】従って、耐圧劣化に問題となる支持部のシ
ャープエッヂは折り曲げ片94になり、平面部となるシ
ャープエッヂを除去する事ができる。次に本発明の支持
電極9をG4 電極14bに採用した時の電子銃基体1の
断面(高電圧電極であるG5 電極15側より見た)を図
2に示した。Therefore, the sharp edge of the supporting portion, which causes a problem of deterioration in pressure resistance, becomes the bent piece 94, and the sharp edge which becomes the flat portion can be removed. Next, FIG. 2 shows a cross section of the electron gun substrate 1 when the supporting electrode 9 of the present invention is adopted as the G 4 electrode 14b (as seen from the G 5 electrode 15 side which is a high voltage electrode).
【0015】図2において、支持電極9の立込部92は
ビードガラス2の中に挿入されるため、支持部91の折
り曲げ片94の無いところはビードガラスの中にうめ込
まれるため、シャープエッヂ・プレスのカエリは従来と
同様に耐圧に影響がなくなる。又、コ字状支持電極の底
部の溶接部93も従来品と同様高電圧電極側から見た時
フォーカス電極であるG4 電極14bのカール部8で電
界が遮蔽され耐圧への影響も小さい。従って、支持電極
9の大部分は折り曲げ片94が高圧電極であるG5 電極
15に対向する事になり、低電圧側のバリ・シャープエ
ッヂがなくなり耐電圧特性が大幅に向上した。In FIG. 2, since the protruding portion 92 of the supporting electrode 9 is inserted into the bead glass 2, a portion of the supporting portion 91 where there is no bent piece 94 is embedded in the bead glass, so that a sharp edge is formed.・ Press burrs do not affect the pressure resistance as before. Also, the welded portion 93 at the bottom of the U-shaped support electrode has a small effect on the breakdown voltage because the electric field is shielded by the curl portion 8 of the G 4 electrode 14b, which is the focus electrode, when viewed from the high voltage electrode side as in the conventional product. Therefore, in most of the supporting electrode 9, the bent piece 94 faces the G 5 electrode 15, which is a high-voltage electrode, and the burrs and sharp edges on the low voltage side are eliminated, and the withstand voltage characteristic is greatly improved.
【0016】図3は本実施例による耐電圧特性の改善効
果を示すもので、従来品と本発明実施品とについて図3
(a)に示すように電極間に電圧を印加し、その印加電
圧を増加させ電極間のリーク電流が50nAになったと
きの電圧値を比較したものである。図3(b)はの結果
を示したものであり、本発明の実施品は従来品に比べて
約3.5kV改善されたことが判る。FIG. 3 shows the effect of improving the withstand voltage characteristics according to this embodiment. FIG. 3 shows the conventional product and the product of the present invention.
As shown in (a), a voltage is applied between the electrodes, the applied voltage is increased, and the voltage value when the leak current between the electrodes reaches 50 nA is compared. FIG. 3B shows the result of FIG. 3B, and it can be seen that the product of the present invention is improved by about 3.5 kV as compared with the conventional product.
【0017】なお、本発明はビデオプロジェクタ用電子
銃の円筒電極の支持電極に有効であるが、テレビ用等の
インライン型電子銃の電極支持に使用する支持電極につ
いて有効であることは言うまでもない。Although the present invention is effective as a supporting electrode for a cylindrical electrode of an electron gun for a video projector, it goes without saying that it is effective for a supporting electrode used for supporting an electrode of an in-line type electron gun for a television or the like.
【0018】[0018]
【発明の効果】以上のように、請求項1の発明によれ
ば、支持電極の支持部は隣接する電極に対向する部分の
エッジ部が減り放電リークの発生を防止するので、耐圧
劣化の少ない高電圧でも安定して動作させることのでき
るブラウン管用の電子銃を得ることができる。また、請
求項2に記載の発明によれば、支持電極の支持部を折り
曲げて平坦部片を形成して隣接する電極に対向するエッ
ジ部をほとんど無くしたので、高電圧でも放電リークが
ほとんど発生せず、耐圧劣化の非常に少ない高電圧でも
常に安定して動作させることのできるブラウン管用の電
子銃を得ることができる。また、請求項3に記載の発明
によれば、電子銃を構成する電極をエッジ部のない円筒
状の電極としたので、支持電極との間の放電リークの発
生を防止し、耐圧劣化の少ない高電圧でも安定して動作
させることのできるブラウン管用の電子銃を得ることが
できる。As described above, according to the first aspect of the present invention, since the edge portion of the supporting portion of the supporting electrode facing the adjacent electrode is reduced and the occurrence of discharge leakage is prevented, the breakdown voltage is less deteriorated. It is possible to obtain an electron gun for a cathode ray tube that can be stably operated even at a high voltage. Further, according to the invention of claim 2, since the supporting portion of the supporting electrode is bent to form a flat piece and almost no edge portion facing the adjacent electrode is formed, discharge leakage is generated even at a high voltage. Therefore, it is possible to obtain an electron gun for a cathode ray tube that can always operate stably even at a high voltage with very little deterioration in breakdown voltage. According to the third aspect of the invention, since the electrode forming the electron gun is a cylindrical electrode having no edge portion, the occurrence of discharge leak between the electrode and the supporting electrode is prevented, and the breakdown voltage is less deteriorated. It is possible to obtain an electron gun for a cathode ray tube that can be stably operated even at a high voltage.
【0019】また、請求項4に記載の発明によれば、放
電リークの発生しやすい支持電極の支持部にのみ平坦部
片を設けるようにしたので、他の支持電極は従来の支持
電極を流用でき、コスト低減を図れる。さらに、請求項
5に記載の発明によれば、支持電極の支持部に設けた平
坦部片の端部ではプレス成形時に発生するプレスのかえ
りは放電リークの発生を誘発しない方向にしているの
で、さらに効果的に放電リークの発生を防止でき、耐圧
劣化の少ない高電圧でも非常に安定して動作させること
のできるブラウン管用の電子銃を得ることができる。Further, according to the invention described in claim 4, since the flat piece is provided only on the supporting portion of the supporting electrode where the discharge leak is likely to occur, the other supporting electrodes are the conventional supporting electrodes. Therefore, the cost can be reduced. Further, according to the invention as set forth in claim 5, since the burr of the press generated at the time of press molding at the end of the flat piece provided on the support portion of the support electrode is in a direction that does not induce the occurrence of discharge leak, Further, it is possible to obtain an electron gun for a cathode ray tube which can effectively prevent the occurrence of discharge leak and can operate extremely stably even at a high voltage with little breakdown voltage deterioration.
【図1】 本発明の一実施例における電子銃の支持電極
の構造を示す斜視図である。FIG. 1 is a perspective view showing a structure of a supporting electrode of an electron gun according to an embodiment of the present invention.
【図2】 本発明の一実施例における電子銃の支持電極
の取り付け状況を示す図である。FIG. 2 is a diagram showing a mounting state of a support electrode of an electron gun in one embodiment of the present invention.
【図3】 本発明による効果を説明する図である。FIG. 3 is a diagram illustrating an effect of the present invention.
【図4】 従来の電子銃の基本構造を示す図である。FIG. 4 is a diagram showing a basic structure of a conventional electron gun.
【図5】 従来の電子銃の基本構造の部分拡大図であ
る。FIG. 5 is a partially enlarged view of the basic structure of a conventional electron gun.
【図6】 従来の電子銃における支持電極の構造を示す
斜視図である。FIG. 6 is a perspective view showing a structure of a support electrode in a conventional electron gun.
1 電子銃基体 14 G4 電極 2 ビードガラス 15 G5 電極 3 コネクター(フォーカス電圧) 71 支持電極の
支持部 4 コネクター 72 支持電極の
立込部 5 シールドカップ 73 支持電極の
溶接部 6 コンタクター 9 本発明の支持
電極 7 支持電極 91 本発明の支
持電極の支持部 8 カール部 92 本発明の支
持電極の立込部 11 G1 電極 93 本発明の支
持電極の溶接部 12 G2 電極 94 本発明の支
持電極の折り曲げ片 13 G3 電極1 Electron Gun Base 14 G 4 Electrode 2 Bead Glass 15 G 5 Electrode 3 Connector (Focus Voltage) 71 Support Electrode Support 4 Connector 72 Support Electrode Standing 5 Shield Cup 73 Support Electrode Weld 6 Contactor 9 Present Invention Support electrode of 7 Support electrode 91 Support part of support electrode of the present invention 8 Curling part 92 Curvature part of support electrode of the present invention 11 G 1 electrode 93 Weld part of support electrode of the present invention 12 G 2 electrode 94 Support of the present invention Electrode bending piece 13 G 3 electrode
Claims (5)
記複数の電極のそれぞれにその底部が固着された複数の
支持電極と、 上記複数の支持電極の上記支持部の一部が埋設され、上
記複数の電極を所定の位置に固定的に配設するビードガ
ラスとを備え、 上記複数の支持電極の支持部の少なくとも1つは、その
底部と上記ビードガラスの間において隣接する電極に対
向する平坦部片を設けたことを特徴とするブラウン管用
電子銃。1. A plurality of electrodes forming an electron gun, and a plurality of support electrodes each having a bottom portion fixed to each of the plurality of electrodes and having a substantially U-shaped shape including a bottom portion and two support portions. A bead glass in which a part of the support portions of the plurality of support electrodes are embedded, and the plurality of electrodes are fixedly arranged at predetermined positions, and at least one of the support portions of the plurality of support electrodes is provided. Is an electron gun for a cathode ray tube, characterized in that a flat piece facing the adjacent electrode is provided between the bottom portion and the bead glass.
設けたことを特徴とする請求項1記載のブラウン管用電
子銃。2. The electron gun for a cathode ray tube according to claim 1, wherein the flat portion piece is provided by bending a part of the support portion.
の電極であることを特徴とする請求項1または2記載の
ブラウン管用電子銃。3. The cathode ray tube electron gun according to claim 1, wherein the plurality of electrodes forming the electron gun are cylindrical electrodes.
極の内、高電圧が印加される電極に対向する低電圧側電
極に固着された支持電極の支持部に設けたことを特徴と
する請求項1乃至3のいずれかに記載のブラウン管用電
子銃。4. The flat portion piece is provided on a support portion of a support electrode fixed to a low voltage side electrode facing the electrode to which a high voltage is applied among a plurality of electrodes forming the electron gun. An electron gun for a cathode ray tube according to any one of claims 1 to 3.
レスのかえりの方向が平坦部片の端部においては上記支
持電極の内側になるようにプレス成形されていることを
特徴とする請求項1乃至4のいずれかに記載のブラウン
管用電子銃。5. The support electrode is press-molded so that the direction of press burr generated during press-molding is inside the support electrode at the end of the flat piece. 4. The electron gun for a cathode ray tube according to any one of 4 to 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26021394A JPH08124498A (en) | 1994-10-25 | 1994-10-25 | Electron gun for cathode-ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26021394A JPH08124498A (en) | 1994-10-25 | 1994-10-25 | Electron gun for cathode-ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08124498A true JPH08124498A (en) | 1996-05-17 |
Family
ID=17344924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26021394A Pending JPH08124498A (en) | 1994-10-25 | 1994-10-25 | Electron gun for cathode-ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08124498A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100813827B1 (en) * | 2001-10-30 | 2008-03-17 | 삼성에스디아이 주식회사 | Electron gun and CRT utilizing the same |
-
1994
- 1994-10-25 JP JP26021394A patent/JPH08124498A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100813827B1 (en) * | 2001-10-30 | 2008-03-17 | 삼성에스디아이 주식회사 | Electron gun and CRT utilizing the same |
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