Scalable touchscreen processing with realtime role negotiation among asymmetric processing cores

Abstract

A method for determining touch input data complexity and negotiating the processing of touch inputs from a touchscreen controller to a host processor. As touch input data is received from a touchscreen, the data may be evaluated by the touchscreen controller to determine the data's complexity. When the touchscreen controller determines the received touch input data is too complex for touchscreen controller processing, the host processor may be requested to process the data. The touchscreen controller may resume processing touch input data based on low complexity or host processor availability. Complexity may be determined based on evaluations of the number and frequency of touch inputs. Additionally, the touch input data may be evaluated to determine whether it represents multi-touch input. In an aspect, the touchscreen controller may disregard received touch input data determined to be noise.

Description

Background technique [0001] Modern computing devices, such as mobile smartphones and tablet devices, can use touchscreen capabilities to collect and process user touch input data. These touch-sensing devices can contain hundreds of touch sensors (or nodes) managed by a touch-screen controller that processes detected touch input and executes related commands based on the input. The power required to process touch input data may be proportional to the size of the touch screen (ie, panel size), since larger touch screens have larger touch node capacities. As the size and fidelity of touch screens on computing devices increase and the corresponding user inputs applied to these devices become more complex (for example, implementing multi-finger touch gestures), touch screen controllers may become insufficient to handle these devices satisfactorily. data. For example, a touch screen controller may not be able to keep up with multiple and rapid user touches on the screen (e.g., two...

AI Technical Summary

Problems solved by technology

As the size and fidelity of touch screens on computing devices increase and the corresponding user inputs applied to these devices become more complex (for example, implementing multi-finger touch gestures), touch screen controllers may become insufficient to handle these devices satisfactorily. data

For example, a touch screen controller may not be able to keep up with multiple and rapid user touches on the screen (e.g., two-handed multi-touch on a soft QWERTY (standard traditional keyboard) keyboard), which results in missed user input and degraded performance, Both of these scenarios will affect the user experience

Although these computing devices also contain other processors (especially host or core processors capable of handling more resource-intensive operations), these processors typically have high ambient power demands and are not capable of efficient touch input data processing

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