Touch Driving Device Mode Switching for Power Reduction
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Solution Overview
Problem
Conventional touch driving devices consume unnecessary power by driving touch panels even when no object is in proximity, leading to increased power consumption.
Innovation Solution
A touch driving device that switches between different modes to supply varying driving voltages to sensor electrodes or groups, reducing power usage by only activating the necessary components when an object is detected, using a combination of driving channels and sensing units to detect proximity or touch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the touch panel is driven every frame period, then the touch detection function is maintained, but power consumption increases unnecessarily when no object is in proximity
Solution Approach 1:
The touch driving device dynamically switches between first mode (individual sensor electrode driving) and second mode (sensor electrode group driving) based on whether an object is detected in proximity. This dynamic mode switching allows the system to maintain reliable touch detection functionality while adapting power consumption levels to actual operational needs, resolving the contradiction between maintaining function and reducing energy use.
Solution Approach 2:
The system implements periodic sensing to detect object proximity, and only activates full touch driving when needed. By using periodic detection rather than continuous driving, the system maintains the ability to detect touches reliably while significantly reducing power consumption during periods when no object is present, thus resolving the contradiction between functional reliability and energy efficiency.
2Measurement precision
If individual sensor electrodes are driven, then precise touch detection is achieved, but power consumption increases compared to driving sensor electrode groups
Solution Approach 1:
The system dynamically adjusts the driving mode based on operational context. When an object is detected in proximity, it switches to first mode for precise individual sensor electrode driving. When no object is present, it switches to second mode with sensor electrode group driving that consumes less power. This dynamic adaptation resolves the contradiction by providing high precision only when necessary.
Solution Approach 2:
The system applies different driving strategies to different sensor electrode configurations based on local conditions. Individual sensor electrodes receive dedicated driving signals when precision is needed, while groups of sensor electrodes are driven together when power conservation is the priority. This localized quality adjustment resolves the contradiction between precision and power consumption.
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 eliminating unnecessary touch driving, optimizing energy use in touch panel operations.
Implementation Method 1
a panel including a plurality of sensor electrodes for sensing a proximity or a touch of an object
Data Source
AI summary
The present invention provides a touch driving device comprising: a driving channel for supplying a first driving voltage to a sensor electrode in a multi-touch mode and supplying a second driving voltage smaller than the first driving voltage to a sensor electrode group in a one-touch mode; and a connection unit for connecting the sensor electrode to the driving channel in the first mode and connecting the sensor electrode group to the driving channel in the second mode.