Abstract: A method for performing a positioning operation related to an image area having a specific position includes the following steps. A specific orientation directed towards the specific position is provided, wherein the specific orientation and the specific position have a specific spatial relation therebetween, and the specific orientation and the image area have a specific angle structure therebetween. The specific angle structure is determined by detecting the specific orientation. The specific spatial relation is calculated according to the determined specific angle structure and the image area. A selection device for performing a positioning operation is also provided.

Abstract: A programmable remote controller, used for controlling audio/video devices, includes a main body, a button module, a motion-sensing module, a microprocessor unit, and a memory. The button module includes a function button group related to the control of the audio/video devices and a programming button group related to the setting of the remote controller. The setting method includes steps of: pressing a first button of the programming button group to start the setting method; pressing at least one function button of a function button group which corresponds to at least one function operation of the audio/video devices; controlling the main body of the remote controller to have a first motion status which is sensed by the motion-sensing module; and storing the first motion status and a first control command corresponding to the at least one function operation in the memory.

Abstract: A method for performing a positioning operation related to an image area having a specific position includes the following steps. A specific orientation directed towards the specific position is provided, wherein the specific orientation and the specific position have a specific spatial relation therebetween, and the specific orientation and the image area have a specific angle structure therebetween. The specific angle structure is determined by detecting the specific orientation. The specific spatial relation is calculated according to the determined specific angle structure and the image area. A selection device for performing a positioning operation is also provided.

Abstract: A selection device for selecting an icon in an image area is provided including a motion-sensing unit and a processing unit. The motion-sensing unit senses a first motion and converts the first motion into a first signal. The processing unit converts the first signal into a first locus in the image area, determines a first area in the image area according to the first locus, and determines whether the icon is to be selected according to the first area and a second area where the icon is to be displayed in the image area.

Abstract: An instruction device is provided for communicating an instruction and an icon in an image area, and includes a motion sensing unit and a processing unit. The motion sensing unit senses a first motion to generate a corresponding first signal. The processing unit generates a first trajectory to determine a first region in the image area in response to the corresponding first signal for a decision whether the icon shall be or has been selected according to a relationship between the first region and a second region where the icon is displayed in the image area.

Abstract: A method is disclosed in this invention for calibrating an offset Voffset and sensitivity Vsensitivity for an accelerometer implemented in a level gauge having a known value of an offset angle ?? and a known value of a relative angle between top-and-bottom surface ?s. The method includes a step of placing the level gauge implemented with the accelerometer on a table-top surface having a tilt angle ?1 and measuring a tilt angle ?F from the level gauge and an output voltage VF from the accelerometer, then rotating the level gauge 180 degrees on the table-top surface along a perpendicular axis relative to the table top surface and measuring a tilt angle ?B from the level gauge and measuring an output voltage VB from the accelerometer.