1. A 50-inch diagonal rear-projection display for HDTV with automatic convergence correction
- Author
-
Masaru Kanazawa and Tetsuo Mitsuhashi
- Subjects
High-definition television ,Computer science ,business.industry ,Diagonal ,Photodiode ,law.invention ,Human-Computer Interaction ,Display size ,Optics ,CRTS ,Hardware and Architecture ,law ,Contrast ratio ,Electrical and Electronic Engineering ,Projection (set theory) ,Error detection and correction ,business - Abstract
A 50-inch diagonal rear-projection display for HDTV has been developed. The resolution on the screen is more than 1000 TV lines, and the contrast ratio is improved by the optical coupling between the CRTs and the projection lenses. The display contains two mirrors in order to make the depth of the display smaller. One of the mirrors contains three photodiodes in order to allow the detection of the convergence error that occurs on the screen. Examining the outputs of the photodiodes, a CPU, located within the display, can detect and correct the convergence error.
- Published
- 1991
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