Dynamically reconfigurable pixel array for optical navigation

摘要

Embodiments of an apparatus are described. In one embodiment, the apparatus is an optical navigation circuit. In particular, the optical navigation circuit may be part of an optical navigation device. The optical navigation circuit includes an image sensor, dynamic reconfiguration logic, and a digital signal processor. The image sensor includes a pixel array to generate a plurality of electrical signals corresponding to incident light at the pixel array. The dynamic reconfiguration logic is coupled to the image sensor. The dynamic reconfiguration logic is configured to receive the plurality of electrical signals from the pixel array and to generate a plurality of reconfigured electrical signals based on the plurality of electrical signals from the pixel array. The digital signal processor is coupled to the dynamic reconfiguration logic. The digital signal processor is configured to receive the plurality of reconfigured electrical signals from the dynamic reconfiguration logic.

主权项

1. An optical navigation circuit of an optical navigation device, the optical navigation circuit comprising:
an image sensor comprising a pixel array to generate a plurality of electrical signals corresponding to incident light at the pixel array; dynamic reconfiguration logic coupled to the image sensor, the dynamic reconfiguration logic to receive the plurality of electrical signals from the pixel array and to generate a plurality of reconfigured electrical signals based on the plurality of electrical signals from the pixel array according to a dynamic reconfiguration mode that is different from a standard mode; and a digital signal processor coupled to the dynamic reconfiguration logic, the digital signal processor to receive the plurality of reconfigured electrical signals from the dynamic reconfiguration logic; wherein the dynamic reconfiguration logic is further configured to generate the reconfigured electrical signals in response to a dynamic reconfiguration trigger; wherein the dynamic reconfiguration logic comprises trigger logic to generate the dynamic reconfiguration trigger; wherein the dynamic reconfiguration trigger comprises a binning trigger and the trigger logic is further configured to generate the binning trigger based on at least one indicator of the following indicators: a first pixel statistics indicator associated with a pixel mean; a second pixel statistics indicator associated with a pixel maximum; a third pixel statistics indicator associated with a pixel histogram; a smoothness indicator to indicate motion tracking smoothness of the optical navigation device; and an image autocorrelation indicator to indicate a pattern repetition of a surface.