The optical trackpad is supplied by Korean firm CrucialTec, according to iSuppli, with an accelerometer and standard Qwerty keyboard adding to the ways of interacting with the smartphone.
In order to detect finger movement across the trackpad, an infrared emitter is used, with a lens directing the rays on to the pad.
Light sensors in each trackpad detect the reflection from its surface - including any change in the pattern due to the presence of the user's finger.
CrucialTec adds that its slimline form factor is "the only alternative input device" capable of serving the demand for slim and simple to use mobile handsets.
With functionality similar to that of a standard computer mouse, the company claims that outstanding user interfaces can be programmed using the optical system.
