A type of thin display. It is a display device that uses a display element called a surface-conduction electron-emitter, and can realize a bright, high-contrast screen like a CRT on a large flat display. The principle is the same as with a CRT, where electrons are bombarded with a light-emitting surface coated with a fluorescent material to cause light to be emitted. In a CRT, an electron gun emits electrons to cause all pixels to emit light, but with an SED, an electron-emitting part is placed on each pixel, making it easy to make the display thinner and larger, and it consumes less power, so it was expected to be a technology that would realize the next generation of large, thin TVs. Research and development was centered on SED, a joint venture between Canon and Toshiba, but a patent lawsuit arose with Applied Nanotech Holdings, an American company, regarding the core technology of SED, and Toshiba withdrew from SED entirely. In 2007, SED became a wholly owned subsidiary of Canon, and mass production and sales plans for SED panels were postponed indefinitely. Regarding the patent dispute in the United States, Canon's victory was finalized in November 2008. [Editorial Department] [Reference] | | |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
薄型ディスプレーの一つ。表面伝導型電子放出素子surface-conduction electron-emitterとよばれる表示素子を応用したディスプレー装置で、ブラウン管のように明るく、ハイ・コントラストの画面を大型平面ディスプレーで実現できる。原理はブラウン管と同様、蛍光物質を塗布した発光面に電子をぶつけて発光させる。ブラウン管は電子を放出する電子銃がすべての画素を発光させるが、SEDではそれぞれの画素ごとに電子放出部を配置するため、薄型化や大画面化が容易であり消費電力も少ないことから、次世代大型薄型テレビを実現する技術として期待された。 キヤノンと東芝の共同出資によるSED社を中心に研究開発が進められたが、SEDの基幹技術に関してアメリカのApplied Nanotech Holdings社との間で特許訴訟がもちあがり、東芝はSEDから全面撤退した。そして2007年(平成19)、SED社はキヤノンの完全子会社になると同時に、SEDパネルの量産化や販売計画も無期限延期となった。なおアメリカにおける特許紛争に関しては、2008年11月、キヤノンの勝訴が確定している。 [編集部] [参照項目] | | |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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