Touch Sensor Transition Electrodes for Full-Screen Display
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Solution Overview
Problem
In full-screen display technologies, the placement of imaging sensors and touch sensors in display apparatuses, such as mobile phones, results in notches that occupy significant display area, limiting user experience due to poor touch performance and signal issues in small regions, especially when perforations are made in the display screen for sensor placement.
Innovation Solution
A touch sensor design with specific electrode configurations and perforation patterns that include transition touch electrodes and jumper conductor wires to enhance touch signal transmission and reduce channel impedance, ensuring better touch performance and reliability across the display screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If imaging sensors and touch sensors are placed in display apparatuses to enable full-screen display, then display area is improved, but touch performance deteriorates in small regions due to poor signal transmission
Solution Approach 1:
The touch electrode is divided into multiple sub-electrodes (first touch sub-electrode and second touch sub-electrode) that are spatially separated by the opening region. These sub-electrodes are electrically connected through transition touch electrodes and jumper conductor wires, allowing the electrode to span across the opening while maintaining electrical continuity and improving touch signal transmission reliability.
Solution Approach 2:
Transition touch electrodes and jumper conductor wires serve as intermediary elements to connect the first and second touch sub-electrodes. These intermediaries bridge the gap created by the opening region, ensuring continuous electrical connection and signal transmission across the discontinuous electrode structure.
2Adaptability or versatility
If perforations are made in the display screen for sensor placement, then sensor functionality is improved, but channel impedance increases leading to poor touch performance
Solution Approach 1:
The opening region is extracted from the continuous electrode structure, creating a discontinuous configuration. The electrode is divided into separate sub-electrodes on either side of the opening, with the opening serving as a dedicated space for sensor placement while maintaining electrical connectivity through alternative paths.
Solution Approach 2:
The jumper conductor wires extend in the second direction (vertical) to connect touch sub-electrodes in the first direction (horizontal), utilizing the vertical dimension to bridge the horizontal gap created by the opening region, thereby maintaining electrical continuity across the perforation.
3Adaptability or versatility
If touch electrodes are discontinuous due to opening regions, then sensor placement is improved, but electrostatic discharge risk increases
Solution Approach 1:
Transition touch electrodes and jumper conductor wires are pre-configured to connect touch sub-electrodes before the device operates. This preliminary electrical connection ensures that even when the electrode is discontinuous due to opening regions, the structure is already prepared to conduct electricity continuously, preventing electrostatic discharge risks.
Data Source
AI summary
A touch sensor and a display apparatus are disclosed. The touch sensor includes a first opening region, a second opening region, first touch electrodes and second touch electrodes. at least one of the plurality of first touch electrodes includes a first transition touch electrode; each of a first group of second touch electrodes in the plurality of second touch electrodes further includes a second transition touch electrode the first transition touch sub-electrode at least partially surrounds the first opening region, and the second transition touch sub-electrode at least partially surrounds the second opening region; and at least part of the second transition touch electrode is positioned between the first transition touch sub-electrode and the second transition touch sub-electrode, and extends along the second direction.