Multiplexed Signal Lines for Narrow Frame Display Panels
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Solution Overview
Problem
The existing force-sensing sensors in touch display technologies occupy a large space in the non-display area of display panels, hindering the design of narrow frames due to the need for separate signal lines.
Innovation Solution
The integration of multiplexed signal lines that connect force-sensing sensors in the non-display area to switch devices and transverse connecting lines, allowing these lines to serve both touch-sensing and force-sensing functions, reducing the need for additional signal lines and minimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate signal lines are provided for force-sensing sensors in the non-display area, then the force-sensing function can be achieved, but the non-display area occupies relatively large space which is disadvantageous to narrow frame design
Solution Approach 1:
The patent applies multiplexed signal lines that serve dual purposes: they function as touch-sensing signal lines during touch detection and as force-sensing signal lines during force detection. This multi-functionality allows the same physical infrastructure to support both sensing modalities, eliminating the need for separate dedicated signal lines for force-sensing sensors and thereby reducing the non-display area occupation.
2Adaptability or versatility
If multiple separate signal lines are used for touch-sensing and force-sensing, then both functions can operate independently, but the device complexity and space requirement increase
Solution Approach 1:
The signal lines are designed to be multiplexed, serving both touch-sensing and force-sensing functions through time-division or phase-based separation. This approach maintains the versatility of having both sensing capabilities while significantly reducing device complexity by eliminating redundant signal line infrastructure.
Solution Approach 2:
The patent employs periodic action by dividing the sensing operation into distinct phases: touch-sensing phase and force-sensing phase. During each phase, the multiplexed signal lines are dedicated to that specific function, allowing both sensing modalities to operate independently in time while sharing the same physical signal path, thus reducing complexity without sacrificing functional independence.
Data Source
AI summary
Provided are a display panel, a display device, and a display panel control method. The display panel includes a display area and a non-display area. The non-display area includes a first area and a second area, and at least one first force-sensing sensor is provided in the first area and/or the second area. A plurality of touch electrodes and a plurality of touch signal lines respectively electrically connected to each of the touch electrodes are provided in the display area, and the touch signal lines include at least one multiplexed signal line respectively corresponding to each of the at least one first force-sensing sensor. The display area further includes at least one transverse connecting line. The display panel further includes at least one switch device, each of which and a corresponding transverse connecting line are connected in series between a corresponding first force-sensing sensor and a corresponding multiplexed signal line.