A projection type image receiving device that can display a large-screen television image on a projection screen. It is also called a television enlargement projection device or a video projector. Projection televisions are classified into three types based on the type: (1) picture tube projection display, (2) light valve, and (3) laser display. (1) combines a high-brightness picture tube with an enlarged projection optical system, and there are two types: a refractive type with a simple configuration that uses a refractive lens in the projection optical system, and a reflective type that uses a concave mirror. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
映写スクリーンに大画面のテレビ画像を表示できる投写形受像装置。テレビジョン拡大投影装置,あるいはビデオプロジェクターvideo projectorなどとも呼ばれる。投写形テレビジョンは方式的に,(1)受像管投写形ディスプレー,(2)ライトバルブ,(3)レーザーディスプレーの3種類に分類される。 (1)は高輝度の受像管と拡大投写用光学系を組み合わせたもので,投写用光学系に屈折レンズを用いた,単純な構成の屈折式と,凹面鏡を用いた反射式がある。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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