Display Panel Touch Sub-Region Switching for Folded-State Power Saving
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Solution Overview
Problem
Existing display technologies face challenges in efficiently managing touch signal transmission and power consumption in foldable display apparatuses, particularly in ensuring seamless touch functionality and reducing power usage when in different operational states.
Innovation Solution
A display panel design with touch regions and peripheral regions, incorporating switch modules and touch channels, allows for selective activation of touch sensing in specific sub-regions, enabling foldable operation with reduced power consumption by controlling switch modules using timing controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch sensing is activated in all touch sub-regions continuously, then touch functionality is maintained across the entire display, but power consumption increases
Solution Approach 1:
The display panel is divided into multiple touch sub-regions (first touch sub-region and second touch sub-region), each with independent touch channels and switch modules. This segmentation allows selective activation of touch sensing in specific sub-regions based on operational mode, enabling power savings when the entire screen touch functionality is not needed.
Solution Approach 2:
The touch sensing system dynamically adjusts its operational state through switch modules that can be selectively turned on or off. In unfolded state, all switch modules are activated for full-screen touch sensing; in folded state, only switch modules corresponding to the visible touch sub-region are activated, adapting power consumption to actual usage requirements.
2Adaptability or versatility
If switch modules are added to control touch signal paths, then selective activation of touch sub-regions is enabled, but device complexity increases
Solution Approach 1:
The switch modules serve multiple functions: they act as signal transmission paths when turned on and as isolation elements when turned off. The same structural components (touch wires, touch channels) are used for both signal transmission and for defining boundary conditions, reducing the need for additional dedicated components.
Solution Approach 2:
The control logic for selective activation is integrated into the existing touch controller architecture. The timing controller receives operational state information and generates appropriate control signals for the switch modules, merging the power management function with the existing touch control system rather than creating a separate control subsystem.
3Ease of operation
If touch wires extend to bonding region for electrical connection, then external connectivity is achieved, but signal transmission path length increases
Solution Approach 1:
The touch wire network is segmented into multiple independent touch wires, each serving specific touch channels. This segmentation allows for optimized routing where each touch wire extends to the bonding region only when necessary, rather than having all wires traverse the entire display area, reducing overall signal transmission path length.
Data Source
AI summary
A display panel includes a touch region and a peripheral region, the peripheral region includes a bonding region, and the touch region includes a plurality of touch sub-regions. The display panel includes touch channels, a plurality of touch wires and a plurality of switch modules. A plurality of touch channels are disposed in each touch sub-region. In the plurality of touch wires, an end of each touch wire is electrically connected to a single touch channel, and another end of each touch wire extends to the bonding region. The plurality of switch modules are disposed between the touch region and the bonding region, and for multiple touch wires electrically connected to the plurality of touch channels located in a same touch sub-region, each of at least a part of the multiple touch wires is electrically connected to a switch module.