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  Method and apparatus for selecting information in multi-dimensional spaceUSPTO Application #: 20070273642Title: Method and apparatus for selecting information in multi-dimensional space Abstract: Method and apparatus for selecting information in a multi-dimensional space are provided. The method includes the steps of sensing the motion of a user intending to select information, and determining whether the sensed motion is an effective motion intended for information selection and returning to the sensing step if it is determined that the motion is not the effective one. Accordingly, difficulty in setting a predetermined threshold to a single value can be overcome. In addition, even a very slight motion can be accurately detected without being influenced by gravity and offsets. Moreover, it can be accurately determined whether a user's two- or three-dimensional motion is an effective motion for selecting information and which motion unit among at least two motion units has generated the effective motion, so that a high correct recognition rate for information and high reliability can be achieved, and a user is allowed to easily select information. (end of abstract) Agent: Sughrue Mion, PLLC - Washington, DC, US Inventors: Tae-Sik Park, Sang-Goog Lee, Kwang-Woon Lee USPTO Applicaton #: 20070273642 - Class: 345156000 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20070273642. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] This application is a continuation of pending prior application Ser. No. 10/484,505 filed Jan. 22, 2005, which is a National Stage Application of PCT Application No. PCT/KR02/01369 filed Jul. 22, 2002, and claims benefit of priority based on Korean Patent Application No. 2001-44588, filed Jul. 24, 2001, the disclosures of which is incorporated herein in their entirety by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an apparatus for sensing a motion for selecting information in a two- or three-dimensional space, and more particularly, to an information selection method and apparatus for determining whether a sensed motion is effective in a multi-dimensional space. [0004] 2. Description of the Related Art [0005] Representative apparatuses for sensing a user's motion for pointing at or inputting information in a two- or three-dimensional space are handheld space-type input apparatuses, such as personal computers (PCs), personal digital assistances (PDAs), and cellular phones; wireless portable pointing apparatuses, wireless portable keyboards; hand motion and gesture recognizing apparatuses; virtual musical playing apparatuses; computer game machines; virtual environment exercise and training apparatuses; virtual reality data gloves; mechanical impact and shake tracking and monitoring apparatuses; and robot motion information acquiring apparatuses. [0006] Usually, in order to determine whether information generated by a user's motion using the above apparatuses is effective, conventionally, a mechanical switch or a pressure sensor is used. In other words, according to a conventional method, when a switch or sensor is pushed or touched on a plane, an on/off signal is generated, and effective information is identified according to the on/off signal. Conventionally, whether a user's motion for selecting information is an effective one can be determined by contact on a plane, but whether a user's motion for selecting information in a three-dimensional space is an effective one cannot be determined via the same method. SUMMARY OF THE INVENTION [0007] The present invention provides an information selection method through which information selected by a user can be exactly recognized from the user's motion for selecting information in a multi-dimensional space. [0008] The present invention also provides an information selection apparatus for performing the above information selection method in a multi-dimensional space. [0009] According to an aspect of the invention, there is provided a method of selecting information in a multi-dimensional space. The method includes the steps of (a) sensing the motion of a user for information selection; and (b) determining whether the sensed motion is an effective motion of the intended information selection and returning to step (a) if it is determined that the motion is not the effective motion. [0010] According to an aspect of the invention, there is provided an apparatus for selecting information in a multi-dimensional space. The apparatus includes at least one motion unit moved by a user intending to select information; at least one sensing unit for sensing the motion of the motion unit and outputting the result of sensing; and at least one effective signal detection unit for checking whether the motion of the motion unit is an effective motion intending to select the information based on the result of sensing and outputting the result of checking as an effective signal. BRIEF DESCRIPTION OF THE DRAWINGS [0011] The above and other features and advantages of the present invention will become more apparent by describing in detail preferred embodiments thereof with reference to the attached drawings in which: [0012] FIG. 1 is a flowchart of a method of selecting information in a multi-dimensional space according to the present invention; [0013] FIG. 2 is a block diagram of an information selection apparatus for performing the method of FIG. 1 according to the present invention; [0014] FIG. 3 is a flowchart of a preferred embodiment of step 16 of FIG. 1 according to the present invention; [0015] FIG. 4 is a block diagram of a preferred embodiment of an effective signal detection unit of FIG. 2 according to the present invention; [0016] FIG. 5 is a block diagram of a first embodiment of a feature amount detector of FIG. 4 according to the present invention; [0017] FIGS. 6A through 6C are waveform diagrams of signals input to or output from the respective parts of the feature amount detector of FIG. 5; [0018] FIG. 7 is a block diagram of a second embodiment of a feature amount detector of FIG. 4 according to the present invention; [0019] FIGS. 8A through 8D are waveform diagrams of the respective parts of FIG. 7; [0020] FIG. 9 is a block diagram of a first embodiment of a signal extractor of FIG. 5 or 7 according to the present invention; [0021] FIG. 10 is a block diagram of a second embodiment of a signal extractor of FIG. 5 or 7 according to the present invention; Continue reading... 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