Abstract: A method for adjusting a warning sensitivity of a movable device having a movement includes the following steps: The movement of the movable device is sensed to generate a plurality of acceleration data associated with a motion identification of the movement. The plurality of acceleration data is sampled to obtain a plurality of parameters within a specific sampling interval. Each of the plurality of parameters is compared with a first pre-determined threshold value to generate a first result; and adjusting a second pre-determined threshold value reflecting the warning sensitivity based on the first result.

Abstract: An alert device for a moving device having a variable acceleration includes a sensing unit and a processor. The sensing unit senses the variable acceleration to generate a plurality of acceleration data. The processor determines a first plurality of acceleration data samples and a second plurality of acceleration data samples from the plurality of acceleration data based on two different predetermined sample sizes and a moving average algorithm to correspondingly calculate a first plurality of sample averages and a second plurality of sample averages, obtains a plurality of sample average differences between the first and the second pluralities of sample averages, analyzes the plurality of sample average differences based on a predetermined check algorithm to obtain a derived resultant value, and performs a data comparison between the derived resultant value and a predetermined threshold value to generate a comparison result.

Abstract: A system for interacting with a target in an operation area having a selection tool includes an operating device. The operating device senses a motion to make a decision about whether the motion has a specific motion, and confirms whether the selection tool is located upon the target according to a distance between the selection tool and the target when the decision is positive.

Abstract: A control device for controlling a screen includes a processing unit. The screen has a geometric reference for an operation and a first pattern associated with the geometric reference. The control device is configured to sequentially have a plurality of reference directions and an operating direction, the plurality of reference directions defines a reference direction range corresponding to the geometric reference, and the operating direction and the reference direction range have a relationship therebetween. The processing unit generates a plurality of patterns associated with the first pattern in the plurality of reference directions, respectively, estimates the reference direction range according to the plurality of reference directions and the plurality of patterns, and controls the operation of the screen by estimating the relationship.

Abstract: A control system for controlling an operation of a screen having a first geometric reference includes a marking device and a remote-control device. The marking device displays a first pattern associated with the first geometric reference on the screen. The remote-control device obtains a signal from the screen. The signal represents an image having a second geometric reference and a second pattern associated with the first pattern. The second pattern and the second geometric reference have a first geometric relationship therebetween. The remote-control device uses the first geometric relationship to transform the second pattern into a third pattern, and calibrates the first geometric reference according to the third pattern for controlling the operation of the screen.

Abstract: A system for interacting with a target in an operation area having a selection tool includes an operating device. The operating device senses a motion to make a decision about whether the motion has a specific motion, and confirms whether the selection tool is located upon the target according to a distance between the selection tool and the target when the decision is positive.