JPH0421978B2 - - Google Patents
Info
- Publication number
- JPH0421978B2 JPH0421978B2 JP59016442A JP1644284A JPH0421978B2 JP H0421978 B2 JPH0421978 B2 JP H0421978B2 JP 59016442 A JP59016442 A JP 59016442A JP 1644284 A JP1644284 A JP 1644284A JP H0421978 B2 JPH0421978 B2 JP H0421978B2
- Authority
- JP
- Japan
- Prior art keywords
- funnel
- distance
- magnetic shield
- internal magnetic
- plane
- 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.)
- Expired - Lifetime
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
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
-
- 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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
【発明の詳細な説明】
3.1 発明の技術分野
この発明は、カラー受像管に係わり、特に管内
放電による内部電極および外部回路部品の損傷を
抑制したカラー受像管に関するものである。DETAILED DESCRIPTION OF THE INVENTION 3.1 Technical Field of the Invention The present invention relates to a color picture tube, and particularly to a color picture tube in which damage to internal electrodes and external circuit components due to internal discharge is suppressed.
3.2 発明の技術的背景とその問題点
一般にカラー受像管はアノード電圧が20〜
30KVと高電圧である。このため、内部電極を保
持しているビード・ガラスの沿面放電とか管内異
物の移動に起因する放電が生じる危険性がある。
ひとたび放電が発生すると、放電電流は数百アン
ペアにも達しカソードやヒータばかりでなく、受
像機の回路部品をも損傷させ、テレビ・セツトの
誤動作や故障の原因となつている。3.2 Technical background of the invention and its problems In general, color picture tubes have an anode voltage of 20~
It has a high voltage of 30KV. Therefore, there is a risk that creeping discharge of the bead glass holding the internal electrodes or discharge due to movement of foreign matter within the tube may occur.
Once a discharge occurs, the discharge current reaches hundreds of amperes, damaging not only the cathode and heater but also the circuit components of the television receiver, causing malfunctions and failures in the television set.
このような危険を取り除くため、フアンネル内
面に塗布する導電膜の抵抗値を高くして、放電時
の放電電流を小さく抑えるいわゆるソフト・フラ
ツシユ管が開発された。第１図はソフト・フラツ
シユ管の一例をあらわす簡略断面図である。図に
おいて、１はパネル、２はフアンネルでコーン部
２ａとネツク部２ｂとからなりたつている。パネ
ル１とフアンネル２は、フリツトと呼ばれるガラ
ス粉体３を介して溶着される。４はパネル１内面
に配置されたシヤドウ・マスク、４′は蛍光体、
５はシヤドウ・マスク４を固定支持している金属
枠であるフレーム、６はフレーム５に接続されコ
ーン部２ａに延在した内部磁気シールドである。
７はコーン部２ａ内面に塗布された導電被膜、８
はコーン部２ａ内面に塗布された高抵抗被膜、９
はネツク部２ｂ内面に塗布された導電被膜、１０
はコーン部２ａに埋設されたアノード・ボタン
で、外部からフアンネル２内面に高電圧を供給す
る。１１は電子銃構体、１２は電子銃構体１１の
一部で、ネツク部２ｂの導電被膜９に接続され
て、高電圧を供給するバルブ・スペーサである。
１３は電子銃構体１１に設けられ、先端にゲツタ
ー１４を固着した金属支持片である。しかしなが
ら、この場合、ゲツター１４がフラツシユされた
とき蒸発したゲツター材料、例えば、バリウムが
高抵抗被膜８上に被着し、導電性被膜を形成する
ため実質抵抗が低下し、放電電流抑制効果が不充
分であつた。 In order to eliminate this risk, a so-called soft flash tube was developed in which the electrically conductive film coated on the inner surface of the funnel has a high resistance value to suppress the discharge current during discharge. FIG. 1 is a simplified sectional view showing an example of a soft flush tube. In the figure, 1 is a panel, and 2 is a funnel, which consists of a cone part 2a and a neck part 2b. The panel 1 and funnel 2 are welded together via glass powder 3 called a frit. 4 is a shadow mask placed on the inner surface of panel 1, 4' is a phosphor,
5 is a frame which is a metal frame that fixedly supports the shadow mask 4, and 6 is an internal magnetic shield connected to the frame 5 and extending to the cone portion 2a.
7 is a conductive coating applied to the inner surface of the cone portion 2a, 8
9 is a high-resistance coating applied to the inner surface of the cone portion 2a;
10 is a conductive coating applied to the inner surface of the neck portion 2b;
is an anode button embedded in the cone portion 2a, which supplies high voltage to the inner surface of the funnel 2 from the outside. 11 is an electron gun assembly; 12 is a part of the electron gun assembly 11, and is a valve spacer connected to the conductive film 9 of the network portion 2b to supply a high voltage.
A metal support piece 13 is provided on the electron gun assembly 11 and has a getter 14 fixed to its tip. However, in this case, when the getter 14 is flashed, the evaporated getter material, such as barium, adheres to the high-resistance coating 8 and forms a conductive coating, which lowers the effective resistance and disables the discharge current suppressing effect. It was enough.
3.3 発明の目的
この発明の目的は上記欠点を除去し、放電電流
と抑制したカラー受像管の提供にある。3.3 Object of the Invention The object of the invention is to eliminate the above-mentioned drawbacks and to provide a color picture tube with suppressed discharge current.
3.4 発明の概要
このような目的を達成するために本発明は、パ
ネル、フアンネル溶着部が形成する平面を基準面
とし、この面から内部磁気シールドのフアンネル
内に延在した端面までの距離が、前記基準面から
アノード・ボタンまでの距離より大きく、かつ前
記基準面からフアンネルのリフアレンスラインま
での距離より小さくなるようにし、さらに内部磁
気シールドの一部に開口窓を設け、内部磁気シー
ルドあるいはフレームに固着されたゲツターが開
口窓と対向する位置になるようにしたものであ
る。3.4 Summary of the Invention In order to achieve the above object, the present invention uses a plane formed by the panel and the funnel welded portion as a reference plane, and the distance from this plane to the end face extending inside the funnel of the internal magnetic shield is The distance is larger than the distance from the reference plane to the anode button and smaller than the distance from the reference plane to the reference line of the funnel, and an opening window is provided in a part of the internal magnetic shield, and the internal magnetic shield or frame is The getter fixed to the window is positioned opposite to the opening window.
3.5 発明の実施例
次に本発明の実施例について図面を参照して説
明する。第２図は、本発明のカラー受像管の実施
例を説明するための簡略断面図であり、第１図と
同記号は同一構成要素となるのでその説明は省略
する。本図に於て２６は内部磁気シールドであり
一端はフレーム５に固着され他端はコーン部２ａ
に延在している。3.5 Embodiments of the invention Next, embodiments of the invention will be described with reference to the drawings. FIG. 2 is a simplified sectional view for explaining an embodiment of the color picture tube of the present invention, and since the same symbols as in FIG. 1 are the same constituent elements, the explanation thereof will be omitted. In this figure, 26 is an internal magnetic shield, one end of which is fixed to the frame 5, and the other end of which is attached to the cone portion 2a.
It extends to
パネル・フアンネル溶着部が形成する平面を基
準面とし、この面から内部磁気シールド２６のコ
ーン部２ａに延在した端面までの距離L2は、同
様に測定したアノード・ボタン１０までの距離を
L1、およびバルブのリフアレンス・ライン２７
までの距離をL3としたとき2L2＝L1＋L3の関係が
成り立つようにした。また、ゲツター２４は、フ
レーム５よりコーン部２ａに延在した金属支持片
２３の先端に固着され、内部磁気シールド２６が
ゲツター２４と対向する部分には、開口窓２８を
設けた。 The plane formed by the panel/funnel weld is used as a reference plane, and the distance L 2 from this plane to the end face extending to the cone portion 2a of the internal magnetic shield 26 is the distance to the anode button 10 measured in the same manner.
L 1 and valve reference line 27
The relationship 2L 2 = L 1 + L 3 holds true when the distance to L 3 is defined as L 3 . Further, the getter 24 is fixed to the tip of a metal support piece 23 extending from the frame 5 to the cone portion 2a, and an opening window 28 is provided in a portion where the internal magnetic shield 26 faces the getter 24.
3.6 発明の効果
このように構成されたカラー受像管は、ゲツタ
ー２４がフラツシユされたとき蒸発したゲツター
材料、たとえば、バリウムの大部分が頂角θなる
円堆面内に飛散し、コーン部２ａでは、内部磁気
シールド２６上に被着するのでゲツター２４のフ
ラツシユ前後で前記高抵抗被膜８の抵抗値は変化
せず充分満足できる放電電流抑制効果をもつ、ソ
フト・フラツシユ管を得ることができる。3.6 Effects of the Invention In the color picture tube constructed as described above, when the getter 24 is flashed, most of the evaporated getter material, such as barium, is scattered within the circular plane having the apex angle θ, and in the cone portion 2a. Since the high resistance coating 8 is coated on the internal magnetic shield 26, the resistance value of the high resistance coating 8 does not change before and after flashing the getter 24, and a soft flash tube having a sufficiently satisfactory discharge current suppressing effect can be obtained.
上記実施例では、ゲツターが固着された金属支
持片をフレームに固定したが、内部磁気シールド
に固定しても同等の効果を得ることができる。 In the above embodiment, the metal support piece to which the getter is fixed is fixed to the frame, but the same effect can be obtained by fixing it to the internal magnetic shield.
第１図は従来のカラー受像管の一例を説明する
ための断面図、第２図は本発明によるカラー受像
管の実施例を説明するための断面図である。
１……パネル、２……フアンネル、５……フレ
ーム、６，２６……内部磁気シールド、７，９…
…導電被膜、８……高抵抗被膜、１０……アノー
ド・ボタン、１３，２３……金属支持片、１４，
２４……ゲツター、２７……リフアレンス・ライ
ン、２８……開口窓。
FIG. 1 is a sectional view for explaining an example of a conventional color picture tube, and FIG. 2 is a sectional view for explaining an embodiment of the color picture tube according to the present invention. 1... Panel, 2... Funnel, 5... Frame, 6, 26... Internal magnetic shield, 7, 9...
... Conductive coating, 8... High resistance coating, 10... Anode button, 13, 23... Metal support piece, 14,
24...getter, 27...reference line, 28...opening window.
Claims (1)
ーム、内部磁気シールドを配設されたパネルと、
内壁の少なくとも一部に高抵抗被膜を形成したフ
アンネルとを溶着し、前記溶着部が形成する平面
を基準面とし、この面から内部磁気シールドのフ
アンネル内に延在した端面までの距離が、前記基
準面からフアンネルに埋設されたアノード・ボタ
ンまでの距離より大きく、かつ前記基準面からフ
アンネルのリフアレンス・ラインまでの距離より
小さくなるようなカラー受像管において、前記内
部シールドの一部に開口窓を設け、内部磁気シー
ルド又は前記フレームに固着されたゲツターが前
記開口窓と対向する位置にあることを特徴とする
カラー受像管。1 A panel equipped with a phosphor, a frame that fixedly supports the shadow mask, and an internal magnetic shield,
A funnel having a high-resistance coating formed on at least a part of the inner wall is welded, and the plane formed by the welded part is used as a reference plane, and the distance from this plane to the end face of the internal magnetic shield extending inside the funnel is In a color picture tube whose distance is greater than the distance from the reference plane to an anode button embedded in the funnel and smaller than the distance from the reference plane to the reference line of the funnel, an aperture window is provided in a part of the inner shield. A color picture tube, wherein an internal magnetic shield or a getter fixed to the frame is located at a position facing the aperture window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1644284A JPS60160548A (en) | 1984-01-31 | 1984-01-31 | Color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1644284A JPS60160548A (en) | 1984-01-31 | 1984-01-31 | Color picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60160548A JPS60160548A (en) | 1985-08-22 |
| JPH0421978B2 true JPH0421978B2 (en) | 1992-04-14 |
Family
ID=11916348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1644284A Granted JPS60160548A (en) | 1984-01-31 | 1984-01-31 | Color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60160548A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR940004076Y1 (en) * | 1991-07-02 | 1994-06-17 | 삼성전관 주식회사 | Inner-shield of color-crt |
| KR100712904B1 (en) | 2004-12-28 | 2007-05-02 | 엘지.필립스 디스플레이 주식회사 | Cathode ray tube |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49116958U (en) * | 1973-02-05 | 1974-10-05 | ||
| JPS50128460A (en) * | 1974-03-29 | 1975-10-09 | ||
| JPS5916699B2 (en) * | 1976-10-04 | 1984-04-17 | 株式会社日立製作所 | color cathode ray tube |
| JPS5385155A (en) * | 1977-01-05 | 1978-07-27 | Hitachi Ltd | Color picture tube |
| JPS643164Y2 (en) * | 1979-12-05 | 1989-01-26 | ||
| JPS5693953U (en) * | 1979-12-20 | 1981-07-25 |
-
1984
- 1984-01-31 JP JP1644284A patent/JPS60160548A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60160548A (en) | 1985-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR950000344B1 (en) | Cathode ray tube with internal magnetic shield | |
| CA1199361A (en) | Crt comprising metallized glass beads for suppressing arcing therein | |
| JPH0447940B2 (en) | ||
| JPH0421978B2 (en) | ||
| US5952777A (en) | Color cathode ray tube | |
| JPS6252422B2 (en) | ||
| US5202606A (en) | Cathode-ray tube with focussing structure and getter means | |
| US6515411B1 (en) | Cathode ray tube having reduced convergence drift | |
| JPH0218919Y2 (en) | ||
| US4818912A (en) | CRT with arc suppressing means on insulating support rods | |
| JPS5847641Y2 (en) | cathode ray tube | |
| US3639797A (en) | Cathode-ray tube having a plated inner metal layer of high-tensile strength | |
| JPS643164Y2 (en) | ||
| JPS607044A (en) | Color picture tube | |
| JPH05234506A (en) | Interior decoration graphite application method for cathode-ray tube | |
| JPS6240347Y2 (en) | ||
| JPS6323873Y2 (en) | ||
| KR100439269B1 (en) | The C-CRT | |
| KR200203872Y1 (en) | Cathode ray tube | |
| JPH0471299B2 (en) | ||
| JPS62272430A (en) | Color cathode-ray tube | |
| JPH08115681A (en) | Cathode-ray tube | |
| JPH10144228A (en) | Flat surface color cathode-ray tube provided with magnetic shielding device | |
| JPH04101351U (en) | Electron gun structure for cathode ray tube | |
| JPS61168845A (en) | Color picture tube |