Controller architecture for combination touch, handwriting and fingerprint sensor

摘要

A separate control system may be configured for a combined sensor device. Alternatively, at least part of the control system may be included in another device, such as a processor of a mobile device. Software for handwriting, touch and fingerprint detection may be included in the control system. Low, medium and high resolution may be obtained with a single combined sensor device by scanning a subset of the sensels, or by aggregating lines or columns. Power consumption may be reduced by aggregating sensor pixels (or rows or columns) electrically using the controller, so that they perform as a low power small array until higher resolution with a larger array is needed. Power consumption may be reduced by turning off portions or all of the sensor device, turning off parts of the control system, and/or employing first-level screening at a reduced frame rate.

主权项

1. An apparatus, comprising:
a substantially transparent substrate; a handwriting and touch sensor formed in a first zone of the substantially transparent substrate, the handwriting and touch sensor including a first plurality of substantially transparent electrodes; a fingerprint sensor formed in a second zone of the substantially transparent substrate, the fingerprint sensor including a second plurality of substantially transparent electrodes; and a control system configured for communication with the first plurality of substantially transparent electrodes and the second plurality of substantially transparent electrodes, the control system being further configured for controlling the apparatus to function as the touch sensor, the handwriting sensor, and the fingerprint sensor, wherein the control system is configured to control the apparatus to function as the touch sensor according to changes in capacitance received via the first plurality of substantially transparent electrodes, wherein the control system is configured to control the apparatus to function as the fingerprint sensor according to changes in resistance received via the second plurality of substantially transparent electrodes and wherein at least part of the control system is configured to be switchable from a touch mode configuration to a handwriting mode configuration.