Abstract: A method of automatically switch of target golf hole is applied in a golf assisting device. The golf assisting device utilizes the memory to store a plurality of golf-hole-region coordinates that define a plurality of regions belonged to every golf hole. A processor of the golf assisting device is used to determine which convex polygon region the golf assisting device is located in accordance with the stored golf-hole-region coordinates in order to automatically switch a corresponding target golf hole of the convex polygon region. The golf assisting device determines in accordance with the corresponding target golf hole of the convex polygon region to proceed and operate other various functions of the golf assisting device so that the golf assisting device can be operated and switched automatically without any manual operation from the golfer.

Abstract: A GPS navigation device without requiring a map database includes a casing, an input module installed on the casing for inputting turning point coordinates and pre-turning point coordinates, a global positioning system, a memory device and a display device. The global positioning system generates position coordinates of the GPS navigation device by a satellite positioning method, outputs a direction instruction to guide a traveling direction according to the turning point coordinates and the pre-turning point coordinates, and display the information on the display device. By pre-planning a route and inputting the turning point and pre-turning point coordinates, direction instructions can be given when the GPS navigation device is situated at position of such coordinates, and thus the GPS navigation device achieves the navigation effect without requiring a map database and also achieves the effects of saving power and lowering cost.

Abstract: A positioning data producing unit can select suitable region position units automatically in accordance with the environmental conditions of the moving target. The location information of a position tracking device is calculated either from a coordinate data of a narrow region and a position data of the narrow region which is selected in accordance with a location of the position tracking device, or from a position data of a broad region, wherein the position data of the narrow region is calculated from a movement parameter of the position tracking device, the position data of the broad region is calculated from a plurality of received satellite signals. The location information is then transmitted via a communication module to a far end receiver.

Abstract: A power-saving position tracking device includes a central processing unit; a short-distance wireless communication unit, for establishing a wireless connection with a short-distance wireless transceiver to perform a position tracking; a GPS receiving unit, for receiving a satellite signal for performing a position tracking and outputting position information; a mobile communication unit, for transmitting the position information to a remote control center. If a signal intensity of a wireless connection between the power-saving position tracking device and the short-distance wireless transceiver is greater than a threshold, the GPS receiving unit and the mobile communication unit will enter into a power saving mode; on the other hand, if the wireless connection signal intensity is smaller than the threshold, the short-distance wireless communication unit will enter into the power saving mode to achieve the power-saving effect.

Abstract: A light-weighted track recorder comprises a track body and track body further comprises a printed circuit antenna set, a processor, a memory, a battery and a substrate, wherein the processor is electrically connected to the printed circuit antenna set, and the processor activates the printed circuit antenna set to receive the satellite signals in accordance with a predetermined time limit, in which the received satellite signals are used by the processor to determine a coordinate point of the moving animal, and the determined coordinate point is then saved in the memory of the track recorder to determine a track record of the moving animal. The printed circuit antenna set and the battery are designed in such to reduce the total weight and size of the substrate of the track recorder.

Abstract: A power-saving hand-held electronic device has a front side and a back side wherein each of the front side and the back side is provided with one light sensor, respectively, for controllably switching the hand-held electronic device between an operating mode and a power-saving mode. When the light sensor on the back side is blocked and the light sensor on the front side is triggered, the electronic device will be ushered into the operating mode or into the power-saving mode otherwise. The electronic device can determine whether the device should enter the power-saving mode, and it can effective control an automatic locking function with a view to achieving the synergistic effect of power saving and convenience.

Abstract: A power-saving position tracking device includes a central processing unit; a short-distance wireless communication unit, for establishing a wireless connection with a short-distance wireless transceiver to perform a position tracking; a GPS receiving unit, for receiving a satellite signal for performing a position tracking and outputting position information; a mobile communication unit, for transmitting the position information to a remote control center. If a signal intensity of a wireless connection between the power-saving position tracking device and the short-distance wireless transceiver is greater than a threshold, the GPS receiving unit and the mobile communication unit will enter into a power saving mode; on the other hand, if the wireless connection signal intensity is smaller than the threshold, the short-distance wireless communication unit will enter into the power saving mode to achieve the power-saving effect.