Segmented Touch Sensor Electrodes Around Display Openings
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Solution Overview
Problem
Existing full-screen display technologies face challenges in providing effective touch performance and user experience due to the placement of imaging sensors and sensors in notches or holes, leading to reduced touch sensitivity, signal interference, and electrostatic issues in small regions surrounding the openings.
Innovation Solution
A touch sensor design with specific electrode configurations and overlapping opening regions that include first and second touch electrodes, connected by sub-electrodes, to enhance touch performance and reduce electrostatic interference, while allowing for imaging sensors to be positioned within the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If imaging sensors and sensors are placed in notches or holes to achieve full-screen display, then display area is increased, but touch sensitivity is reduced and signal interference occurs in small regions surrounding the openings
Solution Approach 1:
The touch sensor is divided into multiple regions (first region, second region with opening, third region) with different electrode configurations. Each region is segmented to address local requirements: the first and third regions have larger electrode areas for better touch sensitivity, while the second region accommodates the opening for imaging sensors.
Solution Approach 2:
Different regions of the touch sensor are designed with different electrode properties. The electrode area varies by region, with larger areas in regions farther from the opening and smaller areas near the opening. This local differentiation optimizes touch sensitivity in each region while accommodating the opening structure.
2Area of stationary object
If imaging sensors are positioned within the display area to achieve full-screen display, then screen-to-body ratio is increased, but electrostatic issues and signal interference occur in regions surrounding the openings
Solution Approach 1:
The electrode configuration is pre-designed to anticipate and prevent electrostatic issues. By planning the electrode layout before the opening is introduced, the design proactively addresses potential electrostatic interference and signal problems in regions surrounding the opening.
Solution Approach 2:
The electrode area parameter is changed based on position relative to the opening. Electrodes in the first and third regions have larger areas, while electrodes in or near the second region have smaller areas. This parameter variation optimizes electrostatic performance and reduces interference in different regions.
3Reliability
If touch electrodes are made larger to improve touch sensitivity, then touch sensitivity is improved, but device complexity increases due to additional sub-electrodes and connections
Solution Approach 1:
Touch electrodes are segmented into multiple sub-electrodes arranged in arrays. This segmentation allows the system to achieve high touch sensitivity through multiple smaller sensing elements working together, rather than requiring a single large electrode that would be simpler to implement.
Solution Approach 2:
Multiple sub-electrodes are combined to form complete touch electrodes. The first touch electrodes and second touch electrodes are merged through electrical connections to create a functional touch sensing system that achieves high sensitivity while distributing the complexity across multiple smaller components.
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
Improves touch sensitivity and reduces electrostatic risks in regions surrounding openings, ensuring reliable touch functionality and enhanced user experience in full-screen displays.
Implementation Method 1
a first touch electrode and a second touch electrode... arranged side by side... extend along first and second directions intersecting with each other
Data Source
AI summary
A touch sensor and a display apparatus are disclosed. The touch sensor includes a first opening region, first touch electrodes and second touch electrodes. The first touch electrodes respectively extend along a first direction, and at least one of the first touch electrodes includes first touch sub-electrodes arranged side by side in the first direction and electrically connected with each other; the second touch electrodes respectively extend along a second direction, and at least one of the second touch electrodes includes second touch sub-electrodes arranged side by side in the second direction and electrically connected with each other; an area of a first touch sub-electrode in the first region is less than that of a first touch sub-electrode in the third region, or an area of a second touch sub-electrode in the first region is less than that of a second touch sub-electrode in the third region.