Patent ID: 8859971

Claim:
A navigation device, comprising: a light emitter disposed within an interior of the navigation device; a light transmitting touch surface having an upper side and a lower side that is opposite the upper side and separated from the upper side, a sensor disposed within the interior of the navigation device and operative to sense light emitted from the light emitter that has reflected into the interior of the navigation device from an object in contact with the upper side; and a redirector sized and positioned within the interior of the navigation device to obstruct light emitted from the light emitter that is directed at the lower side at a lower angle of approximately 0-45 degrees with respect to the lower side, thereby decreasing an amount of light reflected from the lower side to the interior; and pass light emitted from the light emitter that is directed at the lower side at a higher angle of approximately 45-90 degrees with respect to the lower side, thereby allowing light to pass through unobstructed to the upper side.