Single Receiver Superdoze Mode for Capacitive Input Devices
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Solution Overview
Problem
Existing input devices, such as proximity sensor devices, face challenges in power efficiency, particularly in modes where detailed spatial information is not required, as they consume more power in active modes and have limited power savings in normal doze modes.
Innovation Solution
The input device operates in a superdoze mode that requires less power by receiving capacitive signals through a single receive channel, allowing for reduced power consumption while still detecting the presence of input objects within the sensing region, transitioning to active or normal doze modes as necessary based on object presence and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the input device operates in active mode with multiple receive channels to detect input objects, then the detection capability is improved, but the power consumption increases
Solution Approach 1:
The input device dynamically switches between superdoze mode (single receive channel) and active mode (multiple receive channels) based on detection needs. The system activates additional receive channels only when input objects are detected or during normal doze mode, thereby optimizing the balance between detection capability and power consumption.
Solution Approach 2:
The receive channels are segmented into a primary channel used continuously in superdoze mode and additional channels activated only when needed. This segmentation allows the system to maintain basic detection functionality with minimal power consumption while enabling enhanced detection capability when required.
2Reliability
If the input device uses multiple receive channels to detect input objects, then the reliability of detection is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts the number of active receive channels based on operational mode. In superdoze mode, only one channel operates to conserve power, while in active mode, multiple channels are activated to provide reliable detection. This dynamic adjustment maintains detection reliability when needed while minimizing power consumption during low-activity periods.
3Measurement precision
If the input device operates in normal doze mode with multiple receive channels, then the detection accuracy is improved, but the power savings are limited
Solution Approach 1:
The receive channels are divided into a primary channel that remains active in superdoze mode and additional channels that are activated only when transitioning to normal doze or active modes. This segmentation enables the system to achieve significant power savings in superdoze mode while maintaining the capability for accurate detection when higher precision is required.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces power consumption by enabling the input device to operate efficiently in low-power modes without compromising the ability to detect input objects, thereby extending battery life and improving usability in electronic systems.
Implementation Method 1
a plurality of sensor electrodes configured to receive a first plurality of capacitive signals and a second plurality of capacitive signals
Implementation Method 2
receiving the first plurality of capacitive signals from a single receive channel connected to the plurality of sensor electrodes
Data Source
AI summary
An input device, including: a plurality of sensor electrodes configured to receive a first plurality of capacitive signals and a second plurality of capacitive signals; and a processing system operatively connected to the plurality of sensor electrodes and configured to: operate in a superdoze mode by receiving the first plurality of capacitive signals from a single receive channel connected to the plurality of sensor electrodes; execute an analysis of the first plurality of capacitive signals; and operate, based on the analysis, in an active mode by: driving a plurality of transmitter electrodes with a first drive pattern of a sensing signal; and receiving the second plurality of capacitive signals associated with the first drive pattern from a plurality of receive channels connected to the plurality of sensor electrodes. The superdoze mode requires less power than the active mode.