| 講演名 | 1999/3/19 Ir-coated dispenser cathodes for CRTs , |
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| PDFダウンロードページ | PDFダウンロードページへ |
| 抄録(和) | |
| 抄録(英) | Strong demand exists for the development of high-current-density and long-life cathodes for use in cathode ray tubes (CRTs). In response to this demand, the authors have developed and implemented the mass production of two types of Ir-coated 411 type dispenser cathodes having a heater power of 1.31 W and 0.76 W, respectively. These cathodes were designed by computer simulation, and have a structure that allows them to be assembled in electron guns configured for conventional oxide cathodes. The following three types of life tests were carried out in order to confirm the reliability of the cathodes: (1) To investigate temperature changes during the life of the cathodes, a life test of approximately 40,000 h was conducted. The resultant temperature change was small, confirming that the reliability of the cathodes is satisfactory. (2) To investigate emission life, a 32,000 h life test was conducted. The stability of the emission current was thereby confirmed. (3) To investigate heater life, 39,000 h life tests were conducted at several heater temperature levels with a voltage of 300 V applied between the heater and the cathode. From the results of these tests, the minimum life of the heater is estimated to be 80,000 h. The results obtained in the above tests confirm that these cathodes possess good reliability. |
| キーワード(和) | |
| キーワード(英) | Dispenser cathode / Impregnated cathode / Cathode / Cathode ray tube / Life |
| 資料番号 | EID98-238 |
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| 研究会情報 | |
| 研究会 | EID |
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| 開催期間 | 1999/3/19(から1日開催) |
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| 申込み研究会 | Electronic Information Displays (EID) |
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| 本文の言語 | ENG |
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| タイトル（英） | Ir-coated dispenser cathodes for CRTs |
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| キーワード(1)（和/英） | / Dispenser cathode |
| 第 1 著者 氏名（和/英） | / Toshiharu Higuchi |
| 第 1 著者 所属（和/英） | Toshiba Corporation, Electron Tubes & Devices Division |
| 発表年月日 | 1999/3/19 |
| 資料番号 | EID98-238 |
| 巻番号（vol） | vol.98 |
| 号番号（no） | 666 |
| ページ範囲 | pp.- |
| ページ数 | 4 |
| 発行日 | |