Title: Pointing device for use in computer system
Application Number: 99800299 Application Date: 1999.03.11
Publication Number: 1258360 Publication Date: 2000.06.28
Approval Pub. Date: 2003.05.07 Granted Pub. Date: 2003.05.07
International Classifi-cation: G06F3/033;G06K11/18
Applicant(s) Name: Samsung Electronics Co., Ltd. Address:
Inventor(s) Name: Kim Kyoung-Jin;Song Kwang-Ho
Attorney & Agent: xie lina
Abstract:
    A pointing device (20) for controlling cursor movement on a computer display by entering positional information into the computer comprises a housing having an upper opening (22) and a lower inside base (36) directly facing the upper opening, a cylindrical bar (40) mounted on the lower inside base so as to rotate around and slide along its central axis (46) in the upper opening, a plurality of first marking lines (42) printed around a part of the periphery of the cylindrical bar adjacent to one end in parallel with the central axis with a constant interval between the adjacent marking lines, the first marking lines being extended to a given length from the one end, a plurality of second marking lines (44) printed around another part of the periphery of the cylindrical bar adjacent to the other end perpendicularly to the first marking lines with a constant interval between the adjacent marking lines, the second marking lines being extended to a given length from other end, a detection circuit for measuring the rotational and sliding movements of the cylindrical bar respectively by sensing the movements of the first and second marking lines, and a microcomputer for analyzing the detection signal produced by the detection circuit to obtain the positional information.
Time: 6
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