Abstract: A USB-based wireless transmitting/receiving system includes a transmitting portion connected to at least one USB-based peripheral device for receiving a signal from the peripheral device and a receiving portion connected to a computer host and coupled to the transmitting portion in a wireless fashion for receiving and applying the signal from the transmitting portion to the computer host whereby a wireless communication is established between the computer host and the USB-based peripheral device. Both the transmitting portion and the receiving portion include a central processing unit for processing signals received, a receiving unit for receiving signals, a transmitting unit for transmitting signals and a power supply system for powering the transmitting portion or the receiving portion. The power supply system includes a regulation circuit adapted to connect to an electric main.

Abstract: A charging system is incorporated in a computer communicable through a predetermined communication channel with a wireless peripheral device having a predetermined identification code. The charging system includes a charging device mounted to and in electrical connection with the computer. The charging device has a positive terminal, a negative terminal and a reset terminal. A rechargeable device is mounted in the wireless peripheral device. The rechargeable device includes a positive terminal, a negative terminal and a reset terminal corresponding to and engageable with the terminals of the charging device. The wireless peripheral device is selectively attached to the computer with the terminals engage each other to conduct an electrical current from the computer to the rechargeable device of the peripheral device and to reset/identify the communication channel and the identification code.

Abstract: A USB wireless keyboard protocol, applied to a computer system using a wireless keyboard. When the USB has entered a standby status, and when the keyboard key is pressed to activate the system from a distant end, to save power consumption and satisfy the regulation of USB standby mode, the receiver will supply power in a specific period of time to the RF module (or I.R.LED) to receive the identification codes transmitted by the keyboard. To reduce reception time, it has additional shorter dummy codes during normal transmission of identification codes, to shorten the time for identification, saving power consumption at USB standby mode.

Abstract: A method for controlling access to and operation of a screen cursor of a computer based on the identification of a user's fingerprint is disclosed. The method includes the steps of (a) establishing a database of fingerprints of authorized users of the computer in advance; (b) reading a fingerprint of a finger of a user who attempts to access the computer by positioning and moving the finger on a mouse pad in connection with the computer; (c) identifying the fingerprint with the database; (d) denying the access to the computer if the fingerprint cannot be recognized; (e) calculating displacement of the finger on the touch pad and converting the displacement into a corresponding distance on the screen; and (f) moving the screen cursor through the distance on the screen. In the method, the touch pad functions to read the fingerprint and determine the displacement of the finger whereby the security and operability of the computer can be enhanced without additional devices.

Abstract: A system for identifying electric device includes a charging/discharging circuit comprised of at least one electric capacitor and one additional electric element, such as an electric resistor or an electric inductance. The charging/discharging circuit is connected to at least one input/output port of a central processing unit and has a particular charging/discharging characteristics based on values of the capacitor and the resistor or the inductance. The particular charging/discharging characteristics provides an identification code of the device. The identification code may be used to identify a particular product in for example a communication link between a central processing unit of a host machine and a peripheral device or be used to identify a particular model of products manufactured in a manufacturing line whereby the same facility may be used to manufacture different models of products thereby effectively reducing the manufacturing costs.