Device Differences - Tactile effects library

A wide variety of peripheral devices are enabled with Immersion TouchSense technology. Different models of TouchSense computer mice are available for use in web browsers, games, and productivity applications. Gamepads, joysticks, and steering wheels for games and simulators exist from a variety of manufacturers (Archived). Yet other types of devices are under development in Immersion's laboratories.

The nature of the device limits the types of touch effects felt. A steering wheel, for instance, turns left and right, so it plays effects on the x-axis only. A joystick, attached to its base at a single point, cannot play effects which require an exploration of 2-dimensional space, like textures and contours. A tactile mouse, free from a base attachment, is unable to exert lateral forces, making it unable play effects like pushes, pulls, gravity, or resistance to movement.

Despite the apparent limitations of any given device, the variety of individual sensations each can play is virtually limitless. In tactile effect design, the challenge lies in creating compelling sensations which convey the correct impression, taking into account strengths, weaknesses, and limitations of the target device. An analogy can be made in symphonic music: A violin and a piano each make music, but the two instruments cannot do exactly the same things. Nonetheless, breathtaking concertos have been written by talented composers for each of these instruments, each taking advantage of the instrument's strengths and sidestepping its limitations.

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