US Patent 7145532 Image display apparatus

Patent 7145532 was granted and assigned to Hitachi on December, 2006 by the United States Patent and Trademark Office.

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Patent Inventor Names

Hajime Akimoto0

Hiroshi Kageyama0

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Patent abstract

There is provided an image display apparatus having light emitting elements in its pixels, and capable of producing a high-resolution, multi-gray-scale-level display. In an embodiment of the present invention, each of pixel circuits is provided with a current limiting circuit for generating a specified drive current and a time modulation circuit for modulating a duration of time supplying the specified drive current to the light emitting element. In another embodiment of the present invention, each of pixel circuits is provided with a current limiting circuit for generating a specified drive current and a current generator circuit for generating a plurality of values of currents on the basis of the specified drive current.

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=07145532

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