专利名称：DATA INPUT DEVICE发明人：KODIM, Walter申请号：EP98907934.0申请日：19980109公开号：EP0951689A1公开日：19991027
摘要：A data input device comprising a rotatable ball (1) and rotation detection means(4) for detecting the rotation of said ball (1), characterized by at least one firstinteraction means (2) being provided at a predetermined location on or in said ball (1),and at least one second interaction means (3) being provided at a predetermined locationaround said ball (1), said first and second interaction means (2; 3) being capable of
interacting to thereby exert a force such that the force necessary for rotating said ball (1)depends on the positional relation between said first and second interaction means (2; 3).Therefore, the ball is able to assume a predetermined, finite number of states, and theuser can feel and preferably hear the ball assuming these states.
申请人：TELEFONAKTIEBOLAGET L M ERICSSON (publ)
地址：126 25 Stockholm SE
国籍：SE
代理机构：HOFFMANN - EITLE
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