Independent Touch Controller Power Toggling in Multi-Display Devices
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Solution Overview
Problem
Multi-display touch devices face significant power management challenges due to the high power intensity of display operation and touch sensing, particularly in mobile devices with limited battery life, where existing solutions fail to effectively toggle power states independently between displays without compromising responsiveness and battery longevity.
Innovation Solution
The implementation of power management logic by separate touch controllers in each display allows for independent toggling between high and low power states, with the ability to transition between these states based on communication across an interlink, enabling one display to conserve power while the other remains active, and supporting cross-display communications even in low power mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch sensing is supported in multi-display devices, then touch functionality is enabled, but power consumption increases significantly
Solution Approach 1:
The touch system dynamically transitions between high power state (with touch sensing enabled) and low power state (with touch sensing disabled) based on operational needs. Each display's touch controller independently manages power state transitions, allowing the system to adapt power consumption to actual touch functionality requirements rather than maintaining a static high-power configuration.
2Duration of action of moving object
If power state is reduced in one display, then battery life is extended, but responsiveness may be compromised
Solution Approach 1:
The system performs preliminary actions by pre-loading or pre-positioning data and communication buffers before transitioning to low power state. This ensures that when the display is in low power mode, essential communications and data access can still occur without significant delay, maintaining responsiveness while conserving battery life.
3Adaptability or versatility
If independent power state toggling is implemented between displays, then power management flexibility is improved, but system complexity increases
Solution Approach 1:
The power management system is segmented into independent control units, with each display having its own touch controller that independently manages power state transitions. This segmentation allows each display to be controlled separately without requiring complex centralized coordination, reducing overall system complexity while maintaining flexibility.
4Loss of energy
If touch system is toggled to low power state, then energy consumption is reduced, but touch detection capability is lost
Solution Approach 1:
The touch system employs periodic action by transitioning to low power state during periods when touch detection is not needed, then returning to high power state when touch functionality is required. This periodic switching between states allows the system to minimize energy consumption while ensuring touch detection capability is restored when needed, balancing energy savings with functional reliability.
Data Source
AI summary
Power management logic of a multi-display touch device provides for selectively reducing a power state of a touch system within each individual display at times when the touch system of the display is inactive. The power management logic facilitates selective toggling of the touch system from a high power state to a low power state independent of a power state of other touch systems in the multi-display device, The power management logic further facilitates selective toggling of the touch system power state from the low power state to the high power state responsive to a communication received across the interlink.