Electronic Device Input Sensing Electrode Compensation Around Display Holes
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Solution Overview
Problem
Existing electronic devices face challenges in providing uniform sensitivity to external inputs across their active areas due to variations in electrode configurations and the presence of holes that disrupt signal integrity.
Innovation Solution
The electronic device incorporates a design with first and second sensing electrodes, each featuring main, adjacent, and compensation patterns, with compensation patterns positioned between the electrodes and the hole to maintain even sensitivity, and connection lines ensuring electrical continuity across these patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a hole is defined in the active area to allow light transmission or component passage, then light transmission capability or component accessibility is improved, but sensitivity uniformity deteriorates due to disruption of electrode continuity
Solution Approach 1:
The sensing electrode is divided into multiple separate patterns (first sensing pattern, second sensing pattern, third sensing pattern) that are electrically connected through connection patterns. This segmentation allows the electrode to maintain electrical continuity while physically accommodating the hole in the center, thereby preserving both light transmission capability and sensitivity uniformity.
Solution Approach 2:
Connection patterns act as intermediary elements that electrically link the separate sensing patterns around the hole. These intermediaries ensure that the discontinuous electrode structures maintain proper electrical connectivity, compensating for the sensitivity loss that would otherwise occur due to the hole's disruption of electrode continuity.
2Adaptability or versatility
If sensing electrode patterns are modified to accommodate holes, then hole compatibility is improved, but electrode configuration complexity increases
Solution Approach 1:
Multiple functional elements are merged into a unified electrode structure. The first, second, and third sensing patterns are electrically combined through connection patterns to function as a single integrated sensing electrode. This merging approach achieves hole compatibility while avoiding the need for separate independent electrode structures, thereby controlling overall device complexity.
Solution Approach 2:
The sensing electrode structure serves multiple functions simultaneously: it detects external inputs, accommodates the hole for light transmission or component passage, and maintains electrical continuity through connection patterns. This multi-functionality reduces the need for additional separate components, thereby managing device complexity while achieving hole compatibility.
3Manufacturing precision
If compensation patterns are added adjacent to the hole, then sensitivity uniformity is improved, but device area increases
Solution Approach 1:
Compensation patterns are strategically positioned only in specific locations adjacent to the hole where sensitivity uniformity is compromised, rather than uniformly distributing sensing elements across the entire electrode area. This localized approach corrects sensitivity variations near the hole while minimizing the overall area increase.
Solution Approach 2:
The compensation patterns provide a partial correction for the sensitivity loss caused by the hole, using only the minimum necessary additional electrode area. By applying compensation only where needed (adjacent to the hole) rather than throughout the entire electrode, the solution achieves sensitivity uniformity with minimal area penalty.
Data Source
AI summary
An electronic device includes a display unit including an active area configured to display an image, a peripheral area adjacent to the active area, and an input sensing unit disposed on the display unit within the active area. The input sensing unit includes a first sensing electrode disposed in the active area and a second sensing electrode spaced apart from the first sensing electrode and disposed in the active area.