发明授权
US07095404B2 Electronic writing and erasing pencil 失效
电子书写和擦除铅笔

Electronic writing and erasing pencil
摘要:
An electronic writing instrument for rewritable electronic writing surfaces. A self-powered, untethered, pencil-like instrument uses a perpendicular fringe field for changing the orientation of pixels composed of bistable, bichromal colorant elements. An appendix hereto describes bistable, bichromal, molecular colorant.
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