Sensor Layer Electrode Structure for Input Detection
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Solution Overview
Problem
Existing electronic devices face challenges in reliably detecting external inputs, such as user interactions, due to limitations in sensing technology, particularly in distinguishing between different types of inputs like those from a user's body and an input device.
Innovation Solution
The electronic device incorporates a sensor layer with a specific electrode structure, including a plurality of sensing units and sub-sensing units, which utilize variations in mutual capacitance between electrodes and cross electrodes to accurately detect external inputs. This configuration allows for precise coordinate detection and improved reliability in input recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sensing layer with simple electrode structure is used, then the device complexity is low, but the reliability of detection is insufficient
Solution Approach 1:
The sensing layer is divided into multiple sensing units, each further segmented into sub-sensing units with distinct electrode regions. This segmentation allows independent detection zones that can reliably distinguish between different input types (body vs. input device) while maintaining manageable complexity through modular design
Solution Approach 2:
The patent introduces a vertical layering dimension with multiple electrode patterns (first portion, cross patterns, bridge pattern) stacked or arranged in different spatial dimensions. This multi-dimensional electrode configuration enables enhanced detection capability by measuring capacitance variations across multiple dimensions simultaneously
2Measurement precision
If a simple electrode configuration is used, then the manufacturing process is simple, but the measurement precision of external inputs is insufficient
Solution Approach 1:
Each sensing unit is segmented into multiple sub-sensing units with specific electrode arrangements (first portion extending in first direction, cross patterns, bridge pattern). This segmentation enables precise coordinate detection by localizing input positions within specific sub-unit regions while using standardized manufacturing processes for each segment
Solution Approach 2:
Different regions of the electrode structure have specialized functions: the first portion extends in a specific direction for primary sensing, cross patterns provide orthogonal detection, and bridge patterns connect regions. This local quality optimization enables high measurement precision in different spatial zones
3Reliability
If conventional sensing units without sub-division are used, then the device structure is simple, but the ability to distinguish different input types is insufficient
Solution Approach 1:
Sensing units are divided into multiple sub-sensing units with distinct electrode configurations (first portion, cross patterns, bridge pattern). Each sub-unit responds differently to various input types, enabling reliable discrimination between body inputs and input device inputs through pattern recognition of the capacitance variation signals
Solution Approach 2:
The bridge pattern acts as an intermediary element that electrically connects the first portion and cross patterns while being insulated from the first portion. This intermediary structure enables differential measurement capabilities that help distinguish between different types of external inputs
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
The enhanced sensor layer design significantly increases the reliability and accuracy of input detection, ensuring precise coordinate capture for both user interactions and input device inputs, thereby improving overall user experience and device performance.
Implementation Method 1
The sensor layer is configured to obtain information about external inputs by sensing based on a variation in mutual capacitance between a plurality of said electrodes and a plurality of said cross electrodes
Data Source
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AI summary
An electronic device, includes: a sensor layer having an active region and a peripheral region adjacent to the active region, the sensor layer including a plurality of sensing units on the active region and a plurality of wiring lines on the peripheral region, wherein each of the plurality of sensing units includes a plurality of sub-sensing units, wherein each of the plurality of sub-sensing units includes: a first portion extending in a first direction; a plurality of second portions protruding from the first portion; a plurality of cross patterns spaced apart from each other across the first portion; and a bridge pattern insulated from the first portion and electrically connected to the plurality of cross patterns, the bridge pattern intersecting the first portion, wherein the plurality of wiring lines include a first wiring line and a second wiring line that are electrically connected to the plurality of sub-sensing units.