KR950002001Y1 - Oxide cathode of electron gun for cathode ray tube - Google Patents
Oxide cathode of electron gun for cathode ray tube Download PDFInfo
- Publication number
- KR950002001Y1 KR950002001Y1 KR2019890021267U KR890021267U KR950002001Y1 KR 950002001 Y1 KR950002001 Y1 KR 950002001Y1 KR 2019890021267 U KR2019890021267 U KR 2019890021267U KR 890021267 U KR890021267 U KR 890021267U KR 950002001 Y1 KR950002001 Y1 KR 950002001Y1
- Authority
- KR
- South Korea
- Prior art keywords
- cathode
- electron gun
- ray tube
- oxide
- oxide cathode
- 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 - Fee Related
Links
- 239000010953 base metal Substances 0.000 claims description 13
- 239000010406 cathode material Substances 0.000 description 9
- 239000002784 hot electron Substances 0.000 description 6
- 239000007773 negative electrode material Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 3
- 235000014653 Carica parviflora Nutrition 0.000 description 2
- 241000243321 Cnidaria Species 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/26—Supports for the emissive material
-
- 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
- H01J29/04—Cathodes
Landscapes
- Solid Thermionic Cathode (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래 산화물 음극이 채용된 전자총에 있어서의 3극부의 발췌도.1 is an excerpt of a three-pole portion in an electron gun employing a conventional oxide cathode.
제2도는 본 고안의 산화물음극의 한 실시예가 채용된 전자총에 있어서의 3극부의 발췌도.2 is an excerpt of a three-pole portion in an electron gun in which one embodiment of the oxide cathode of the present invention is employed.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
S : 슬리이브 C : 캡S: Sleeve C: Cap
K : 음극물질 G1 : 제어그리드K: Cathode material G1: Control grid
G2 : 스크린 그리도 R : 캡의 만곡형 요홈G2: Screen drawing R: Curved groove on the cap
본 고안은 음극선관용 전자총의 산화물 음극에 관한 것으로서, 특히 캡의 구조를 개선하여 전자방출 분포가 캡의 중앙 부위로 집중될 수 있도록 개량함으로써 전자방출 효율이 증대됨과 아울러 수명이 연장된 음극선관용 전자총의 산화물 음극에 관한 것이다.The present invention relates to an oxide cathode of an electron gun for a cathode ray tube, and in particular, by improving the structure of the cap so that the electron emission distribution can be concentrated at the center of the cap, the electron emission efficiency is increased and the life of the electron gun for the cathode ray tube is extended. It relates to an oxide cathode.
일반적인 산화물 음극은 제1도에 도시된 바와 같이 산화물 음극물질(K) 이 도포되는 캡(C)과, 이를 지지고정 하는 슬리이브(S)와, 이에 내장되는 히이터(H)로 구성되는바, 이 산화물 음극은 상기 베이스메탈(C)에 근접 설치된 제어그리드(G1)와, 스크린 그리드(G2)와 함께 전치 3극부(三極部)를 이룬다. 이 전치 3극부는 전자빔을 생성하는 것으로서 각 부품의 제조정밀도와, 각 부품간의 조립 정밀도등에 의해서 그 특성이 급변하게 된다. 이러한 3극부에 있어서의 수명은 산화물 음극물질(K)에 의해 결정되게 되는데, 음극물질(K)과 베이스메탈(C)과의 계면(界面)에서 생성되는 중간 저항층에 의해 크게 변화받게 된다. 이 중간 저항층은 음극동작중 발생되는 BaO와 베이스메탈(C)에 함유된 미량이 Mg와의 환원 반응에 의해 생성되는 것으로서, 그 생성량이 일정치이상으로 상승되게 되면 음극물질(K)로 부터의 열전자 방츌 효율이 급격히 저하되게 된다. 이러한 중간 저항층에 의한 열전자 방출 효율이 저하 현상은 모든 산호물 음극에 있어서 공히 일어나는 것으로서 이에 대한 대책이 요구되고 있다.The general oxide cathode is composed of a cap (C) to which the oxide cathode material (K) is applied, a sleeve (S) for holding and fixing the heater (H) embedded therein, as shown in FIG. This oxide cathode forms a transposition triode with the control grid G1 provided close to the base metal C and the screen grid G2. This transposition triode produces an electron beam, and its characteristics change rapidly due to the manufacturing precision of each part and the assembly precision between the parts. The lifetime at this triode is determined by the oxide cathode material (K), which is largely changed by the intermediate resistance layer produced at the interface between the cathode material (K) and the base metal (C). This intermediate resistance layer is produced by a reduction reaction between Mg of BaO and base metal (C) generated during the operation of the cathode. When the amount of production rises above a certain value, it is removed from the cathode material (K). The thermoelectron discharge efficiency is drastically lowered. The degradation of hot electron emission efficiency caused by the intermediate resistance layer occurs in all coral cathodes, and a countermeasure is required.
또한 종래의 산호물 음극은 구조적으로도 불리한 구성을 갖고 있어서 중간저항층에 의한 수명저하가 더욱 촉진되게 되는데, 제1도에 도시된 바와같이, 베이스메탈(C)에 도포된 음극물질(K)의 두께가 전체적으로 고르기 때문에 에이징시 중간저항층의 형성분포가 전체적으로 고르게 된다. 즉 베이스메탈과 음극물질과의 접촉부위인 계면전체에 걸쳐서 중간저항층이 생성되게 되며, 결론적으로는 일정시기가 경과하게 되면 전자 방출효율이 급격히 저하되게 된다. 한편 음극물질(K)의 표면이 열전자 방출면에서의 열전자 방출분포가 전체적으로 비교적 고른 편이어서 열전자 방출면 주변부에서 발생된 열전자가 제어그리드(G1)의 빔통과공(H) 가장자리 부위에 다량 충돌되게된다. 따라서 제어그리드(G1)가 음극물질에 의해 오염되게 되는데 부수적으로는 음극선관의 관내 이물질에 의한 불량화를 초래하는 가스가 발생되게 된다.In addition, the conventional coral water cathode has a structurally disadvantageous configuration to further promote the reduction of life by the intermediate resistance layer, as shown in Figure 1, the negative electrode material (K) applied to the base metal (C) Since the thickness of the whole is uniform, the distribution of formation of the intermediate resistance layer is uniform throughout. That is, the intermediate resistance layer is formed over the entire interface between the base metal and the cathode material, and consequently, when a certain period of time elapses, the electron emission efficiency rapidly decreases. On the other hand, the surface of the cathode material K has a relatively even distribution of hot electron emission at the hot electron emission surface, so that hot electrons generated at the periphery of the hot electron emission surface collide with the beam passing hole H edge of the control grid G1 in a large amount. do. Therefore, the control grid G1 is contaminated by the negative electrode material, and incidentally, a gas causing deterioration by foreign substances in the tube of the cathode ray tube is generated.
본 고안은 상기한 문제점을 해결하기 위한 것으로서 전자 방출 효율의 증대와 더불어 수명이 연장된 음극선관용 전자총의 산화물을 음극에 관한 것이다.The present invention is to solve the above problems, and relates to the cathode of the oxide of the electron gun for cathode ray tube with an increase in the electron emission efficiency and extended life.
상기의 목적을 달성하기 위하여 본고안의 산화물 음극은, 산화물 음극이 도포되는 베이스메탈과 이를 지지고정하는 슬리이브와, 슬리이브에 내장되는 히이터를 갖춘 것으로서, 특히 상기 음극물질이 도포되는 베이스메탈의 상면에는 만곡된 요홈이 형성되어서 상기 음극물질의 전체적 도포 두께가 중앙부위로 부터 주변부로 갈수록 얇게 설정되도록 하는 점에 특징이 있다.In order to achieve the above object, the oxide cathode of the present disclosure includes a base metal to which the oxide cathode is coated, a sleeve supporting and fixing the same, and a heater embedded in the sleeve. A curved groove is formed so that the overall coating thickness of the negative electrode material is set to become thinner from the central portion to the peripheral portion.
이하 첨부된 도면을 참조하면서 본 고안의 실시예를 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
제2도에 도시된 바와 같이 본 고안의 산화물 음극은 일반적인 구성품을 갖춘다. 즉, 산화물 음극물질(K)이 도포되는 베이스메탈(C)과, 이를 지지고정하는 슬리이브(S)와, 슬리이브(S)에 내장된 채 열에너지를 공급하는 히이터(H)를 갖추어서, 제어그리드(G1)와 스크린 그리드(G2)와 함께 전자총의 3극부(Triode Portion)을 이룸으로써 전자빔을 생성할 수 있게 된다. 그리고 본 고안의 특징적인 요소로서 상기 베이스메탈(C)의 상면에 만곡형 요홈(R)이 형성되어서 이에 음극물질(K)이 도포된다. 이때 음극물질(K)의 두께는 중앙부로 부터 주변부로 갈수록 얇아진다. 여기에서 상기한 만곡형 요홈으로 원추형의 요홈으로 대치될 수 있는 바, 드럼형 요홈은 본 고안에 있어서 별 의미가 없다. 즉 본 고안에 있어서 베이스메탈(C)에 형성되는 요홈(R)은 중심부로부터 주변부로 갈수록 점차적으로 그 깊이가 얕아져야 하는 것이다.As shown in FIG. 2, the oxide cathode of the present invention has a general component. That is, the base metal (C) to which the oxide cathode material (K) is applied, the sleeve (S) for holding and fixing it, and the heater (H) for supplying thermal energy while being built in the sleeve (S), are controlled. By forming the triode portion of the electron gun together with the grid G1 and the screen grid G2, an electron beam can be generated. And as a characteristic element of the present invention, the curved groove (R) is formed on the upper surface of the base metal (C) is applied to the negative electrode material (K). At this time, the thickness of the negative electrode material (K) becomes thinner from the central portion to the peripheral portion. Here, the above-mentioned curved groove can be replaced by a conical groove, the bar-shaped groove has little meaning in the present invention. In other words, the groove (R) formed in the base metal (C) in the present invention should gradually become shallower from the center toward the periphery.
이상과 같은 구성을 갖는 본 고안의 산화물 음극에 의하면 전자방출 표면에서의 열전자 방출 분포가 중심부에 집중되게 된다. 이에 의하면 에이징시 중간저항층인 MgO 피막이 전자방출량이 많은 요홈(R)의 중심부에 집중적으로 형성되고, 그 주변부에는 생성량이 중앙부에 비해 극히 적다. 이에 의하면 우선 제어그리드(G1)의 빔통과공(H)의 가장자리에 대한 빔의 충돌량이 감소되게 된다.According to the oxide cathode of the present invention having the above configuration, the hot electron emission distribution on the electron emission surface is concentrated at the center portion. According to this, during the aging, the MgO film, which is an intermediate resistance layer, is concentrated in the center of the groove R having a large amount of electron emission, and the amount of generation is extremely small in the peripheral portion of the groove R. According to this, first, the collision amount of the beam with respect to the edge of the beam passing hole H of the control grid G1 is reduced.
결과적으로 관내 이물을 야기시키는 원인이 크게 감소되게 된다. 한편으로는 전자빔의 방출량이 적은 음극물질(K)의 주변부와 베이스메탈(C)간의 접촉부위인 계면의 가장자리 부위에서는 통한 중간저항층의 치환 반응이 계속해서 발생됨으로써 전체적인 음극의 수명이 연장되게 된다.As a result, the cause of foreign body foreign matter is greatly reduced. On the other hand, the substitution reaction of the intermediate resistance layer is continuously generated at the edge portion of the interface, which is the contact portion between the peripheral portion of the cathode material K and the base metal C, which has a small emission amount of electron beam, thereby extending the lifetime of the entire cathode. .
이상과 같은 본 고안의 산화물 음극은 그 수명을 단축하는 중간저항층의 생성부위가 베이스메탈의 중앙에 집중되는 한편, 중간저항층의 생성량이 적은 가장자리 부위를 통하여서는 중간저항층의 치환 반응이 충분히 일어날 수 있도록 형성되어 있으므로 종래의 음극에 비해 그 수명이 긴 장점을 가진다.In the oxide cathode of the present invention as described above, the generation portion of the intermediate resistance layer, which shortens its life, is concentrated in the center of the base metal, while the substitution reaction of the intermediate resistance layer is sufficiently performed through the edge portion where the intermediate resistance layer is generated. Since it is formed so that it can have a long lifetime compared to the conventional cathode.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890021267U KR950002001Y1 (en) | 1989-12-31 | 1989-12-31 | Oxide cathode of electron gun for cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890021267U KR950002001Y1 (en) | 1989-12-31 | 1989-12-31 | Oxide cathode of electron gun for cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR910012933U KR910012933U (en) | 1991-07-30 |
| KR950002001Y1 true KR950002001Y1 (en) | 1995-03-23 |
Family
ID=19294981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019890021267U Expired - Fee Related KR950002001Y1 (en) | 1989-12-31 | 1989-12-31 | Oxide cathode of electron gun for cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR950002001Y1 (en) |
-
1989
- 1989-12-31 KR KR2019890021267U patent/KR950002001Y1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR910012933U (en) | 1991-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100369066B1 (en) | cathode structure using feroelectric emitter, and electron gun and cathode ray tube adopting the structure | |
| US4380717A (en) | Magnetrons | |
| KR950002001Y1 (en) | Oxide cathode of electron gun for cathode ray tube | |
| KR0181325B1 (en) | Aging method of field emission cold cathode | |
| KR20030084640A (en) | Oxide cathode for an electron gun, having a denser and thinner emissive zone | |
| US2977496A (en) | Electrode structure for electron tubes | |
| US3467879A (en) | Planar dispenser cathode assembly with a cap member to which an electronemissive,tubular heater,and rodshaped support members are clamped | |
| US4359666A (en) | Cylindrical cathode with segmented electron emissive surface and method of manufacture | |
| US4123684A (en) | Thyratrons | |
| KR100319090B1 (en) | Cathode structure of electron gun for cathode ray tube | |
| KR0166014B1 (en) | Electron-gun for cathode ray tube | |
| KR20020009797A (en) | Electron gun for cathode ray tube | |
| KR0142854B1 (en) | Storage Cathode Structure | |
| KR930001212Y1 (en) | Electron gun of color picture tube | |
| KR100244219B1 (en) | Activation method of submerged type cathode | |
| KR0142847B1 (en) | Storage Cathode Structure | |
| KR0170427B1 (en) | Structure of cathode of the electron gun for crt | |
| KR0161406B1 (en) | Cathode structure of electron gun for cathode ray tube | |
| KR100189836B1 (en) | F.A gun for color CRT and manufacturing method | |
| KR950010691Y1 (en) | Cathod of crt electron gun | |
| KR200187024Y1 (en) | An electron gun of color cathode ray tube | |
| KR100198572B1 (en) | Activation processing method of impregnation type cathode | |
| KR200158742Y1 (en) | Electron gun for crt | |
| KR0155822B1 (en) | Cathode structure of electron gun for cathode ray tube | |
| KR200193988Y1 (en) | Electron gun of cathode ray tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| UA0108 | Application for utility model registration |
Comment text: Application for Utility Model Registration Patent event code: UA01011R08D Patent event date: 19891231 |
|
| UG1501 | Laying open of application | ||
| A201 | Request for examination | ||
| UA0201 | Request for examination |
Patent event date: 19920916 Patent event code: UA02012R01D Comment text: Request for Examination of Application Patent event date: 19891231 Patent event code: UA02011R01I Comment text: Application for Utility Model Registration |
|
| UG1604 | Publication of application |
Patent event code: UG16041S01I Comment text: Decision on Publication of Application Patent event date: 19950225 |
|
| E701 | Decision to grant or registration of patent right | ||
| UE0701 | Decision of registration |
Patent event date: 19950620 Comment text: Decision to Grant Registration Patent event code: UE07011S01D |
|
| REGI | Registration of establishment | ||
| UR0701 | Registration of establishment |
Patent event date: 19950718 Patent event code: UR07011E01D Comment text: Registration of Establishment |
|
| UR1002 | Payment of registration fee |
Start annual number: 1 End annual number: 3 Payment date: 19950718 |
|
| UR1001 | Payment of annual fee |
Payment date: 19980220 Start annual number: 4 End annual number: 4 |
|
| UR1001 | Payment of annual fee |
Payment date: 19990227 Start annual number: 5 End annual number: 5 |
|
| UR1001 | Payment of annual fee |
Payment date: 20000229 Start annual number: 6 End annual number: 6 |
|
| UR1001 | Payment of annual fee |
Payment date: 20010227 Start annual number: 7 End annual number: 7 |
|
| FPAY | Annual fee payment |
Payment date: 20020227 Year of fee payment: 8 |
|
| UR1001 | Payment of annual fee |
Payment date: 20020227 Start annual number: 8 End annual number: 8 |
|
| LAPS | Lapse due to unpaid annual fee | ||
| UC1903 | Unpaid annual fee |