Abstract: A holographic display system provides a holographic image suitable for use as a nightlight in a dimly lit environment wherein the only light in the field of view of the user is essentially the light diffracted into the holographic image being replayed. The holographic display system includes a low watt light source, a hologram recorded with a reference beam matching the beam of the light source employed to replay the hologram, and an enclosing structure for holding the lightsource and hologram in registration wherein the enclosure is configured so that the only light emitted from the display system is emitted from the hologram.

Abstract: A control pad with two input ports for establishing a connection with two three-axis input devices permits six-axis game play. The control pad contains a microprocessor which determines whether one or two three-axis input devices are connected thereto and generates an address signal for communication with a game console to inform a microprocessor of the game console on power up of an exact nature of peripheral input devices which are attached. A thumb-operated rotor assembly is fitted to a top of a joystick for z-axis control and thus allows single-handed three-axis control of computer games through the joystick.

Abstract: A control pad with two input ports for establishing a connection with two three-axis input devices permits six-axis game play. The control pad contains a microprocessor which determines whether one or two three-axis input devices are connected and generates an address signal for communication with the game console to inform the console microprocessor on power up the exact nature of the peripheral input devices which are attached. The present invention also includes a thumb-operable rotor assembly which allows single-handed three axis control of computer games.

Abstract: A protocol for communication between devices connected via a bus having three handshake lines and at least one data line. A first device controls two of the three handshake lines, and a second device controls the third. The first device mixes toggling of the first and second handshake lines in a pattern which identifies a type of information packet. The second device polls the first and second handshake lines, and from the toggling pattern identifies the packet type. Once identified, the packet is transmitted according to a predefined format for the type. Typically, transmission of information is completed asynchronously using the handshake lines to carry request and acknowledge signals. In one embodiment, the protocol is implemented in a virtual reality system having a video game console as a first device and a head mounted display as the second device.