Touch-Sensitive Surface Margin Region Input Rejection
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Solution Overview
Problem
Existing electronic devices face inefficiencies in transitioning from a low-power state to a high-power state due to false positives from unintentional inputs, such as water contact or accidental user contact, leading to unnecessary power usage and user frustration.
Innovation Solution
Implementing a method that detects inputs on a touch-sensitive surface with margin and non-margin regions, where inputs in margin regions and meeting specific criteria are rejected to prevent unnecessary state transitions, using a set of display-wake-rejection criteria to conserve power and improve user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the device transitions to high-power state on any touch input, then user input responsiveness is improved, but false positives from unintentional inputs cause unnecessary power consumption
Solution Approach 1:
The touch-sensitive surface is divided into multiple regions including margin regions and non-margin regions. Touch inputs are evaluated based on their location within these regions, allowing the device to distinguish between intentional user inputs and unintentional contacts such as water droplets or accidental touches during arm crossing.
Solution Approach 2:
Different regions of the touch-sensitive surface are assigned different functional qualities. Margin regions are designated to reject wake transitions, while non-margin regions are designated to accept wake transitions. This local differentiation allows the system to respond appropriately to touches based on their spatial characteristics.
2Reliability
If the device rejects touches in margin regions, then false positives are reduced, but valid user inputs in those regions may be missed
Solution Approach 1:
The system dynamically evaluates multiple input characteristics including touch location, contact area, touch intensity, and touch duration. This dynamic assessment allows the device to adapt its response based on the specific characteristics of each touch, distinguishing between genuine user inputs and false positives even when touches occur in margin regions.
Solution Approach 2:
The system employs a set of wake-rejection criteria that evaluate multiple parameters of the touch input. By assessing whether the input meets specific criteria related to location, area, intensity, and duration, the system provides feedback-based decision-making that reduces false positives while maintaining sensitivity to valid inputs.
3Measurement precision
If multiple touch criteria are evaluated, then accuracy in distinguishing valid inputs is improved, but processing complexity increases
Solution Approach 1:
The system evaluates a comprehensive set of touch characteristics including location, contact area, intensity, and duration. By gathering and analyzing multiple parameters of the touch input, the system achieves high accuracy in distinguishing valid user inputs from false positives, even though this requires processing multiple data points.
Data Source
AI summary
The present disclosure generally relates to methods and devices for rejecting touches to an electronic device that are false positives for transitioning the device from a low-power state to a high-power state. The electronic device, includes a display and a touch-sensitive surface including an array of touch pixels, the array of touch pixels including one or more margin regions and one or more non-margin regions. While the display is in a low-power state, the electronic device detects, at the touch-sensitive surface, an input. In response to detecting the input and in accordance with at least a portion of the input being in the one or more margin regions and a determination that a first input-characteristic of the input meets at least one criterion of a first set of display-wake-rejection criteria, the electronic device forgoes transitioning the display from the low-power state to a high-power state.