Abstract: A versatile and mobile keyboard and a highly energy efficient keyboard scanning method are provided. The keyboard may be used with a variety of mobile devices such as PDAs, cellular phones, and tablet PCs, through various interfaces such as an IR, USB, or Bluetooth™ interface. In particular, an IR head assembly is provided that includes an IR head, a movable arm on which the IR head is mounted, and a connector for attaching to a docking structure. The docking structure may be attached to a keypad, which is electrically coupled to the IR head for transmitting keystroke data through the IR head. When a mobile device is docked on the docking structure, the arm in the IR assembly may be moved to an optimal distance from the IR port of the mobile device to ensure high communication performance between the keyboard and the mobile device. An energy efficient keyboard scanning method utilizes higher-valued pull-up resistors for energy conservation.

Abstract: A versatile and mobile keyboard and a highly energy efficient keyboard scanning method are provided. The keyboard may be used with a variety of mobile devices such as PDAs, cellular phones, and tablet PCs, through various interfaces such as an IR, USB, or Bluetooth™ interface. In particular, an IR head assembly is provided that includes an IR head, a movable arm on which the IR head is mounted, and a connector for attaching to a docking structure. The docking structure may be attached to a keypad, which is electrically coupled to the IR head for transmitting keystroke data through the IR head. When a mobile device is docked on the docking structure, the arm in the IR assembly may be moved to an optimal distance from the IR port of the mobile device to ensure high communication performance between the keyboard and the mobile device. An energy efficient keyboard scanning method utilizes higher-valued pull-up resistors for energy conservation.

Abstract: A versatile and mobile keyboard and a highly energy efficient keyboard scanning method are provided. The keyboard may be used with a variety of mobile devices such as PDAs, cellular phones, and tablet PCs, through various interfaces such as an IR, USB, or Bluetooth™ interface. In particular, an IR head assembly is provided that includes an IR head, a movable arm on which the IR head is mounted, and a connector for attaching to a docking structure. The docking structure may be attached to a keypad, which is electrically coupled to the IR head for transmitting keystroke data through the IR head. When a mobile device is docked on the docking structure, the arm in the IR assembly may be moved to an optimal distance from the IR port of the mobile device to ensure high communication performance between the keyboard and the mobile device. An energy efficient keyboard scanning method utilizes higher-valued pull-up resistors for energy conservation.

Abstract: A method includes a data encoding scheme that has a run length limit of (1,6) and a 25% duty cycle. With error correction, the method achieves an effective run length limit of (2,9). The method can be used in conjunction with a packetized communication protocol to allow multiple controllers to communicate with multiple peripheral devices in a wireless data network. Peripheral devices include pointing devices, keyboards and game pads.

Abstract: An IR interface device is connected over a wired port to a host computer, so as to provide an IR communication link between the host computer and another computing device capable of IR communication. Such an IR interface device may also include a coupling to a printer device. An IR conference device allows communication between devices using different IR communication protocols by providing individual IR communication links to each of the communicating devices and passing data between the individual IR communication links. An IR transceiver integrated circuit with automatic gain control is provided.

Abstract: An IR interface device is connected over a wired port to a host computer, so as to provide an IR communication link between the host computer and another computing device capable of IR communication. Such an IR interface device may also include a coupling to a printer device. An IR conference device allows communication between devices using different IR communication protocols by providing individual IR communication links to each of the communicating devices and passing data between the individual IR communication links. An IR transceiver integrated circuit with automatic gain control is provided.