Sensor Layer Sensitivity via Non-Display Area Expansion
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Solution Overview
Problem
Display devices with varying display area shapes face challenges in achieving uniform sensing sensitivity due to differences in sensor unit configurations, leading to reduced performance in sensing external inputs.
Innovation Solution
The implementation of a sensor layer with a combination of sensor units, including a first sensor unit overlapping the display area and a second sensor unit that extends into the non-display area, featuring expanded portions and protrusions, to enhance sensing sensitivity and compensate for reduced surface areas, thereby improving overall sensing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor units are configured to overlap only the display area, then the sensor layer structure is simple, but the sensing sensitivity is reduced due to limited surface area
Solution Approach 1:
The second sensor unit extends from the display area into the non-display area, utilizing the vertical dimension and spatial extension to increase the effective sensing surface area. This dimensional expansion allows the sensor to capture more input signals without increasing complexity within the display area itself.
Solution Approach 2:
The sensor layer is divided into multiple sensor units with different configurations - the first sensor unit overlaps only the display area while the second sensor unit spans both display and non-display areas. This segmentation allows each unit to be optimized for its specific function while collectively improving overall sensing sensitivity.
2Measurement precision
If sensor units are expanded into the non-display area, then the sensing sensitivity is improved, but the uniformity of sensing across the sensor layer deteriorates
Solution Approach 1:
Different sensor units are assigned different configurations based on their local requirements. The first sensor unit overlapping only the display area maintains standard structure, while the second sensor unit extending into the non-display area is expanded to compensate for the hole's impact, creating locally optimized sensing zones that collectively achieve uniformity.
Solution Approach 2:
The sensor units are designed with asymmetric configurations relative to the hole position. The second sensor unit has an expanded shape that is specifically tailored to compensate for the reduced sensing area caused by the hole, creating an asymmetric distribution that balances the overall sensing uniformity across the sensor layer.
3Measurement precision
If the width of sensor units is increased to compensate for reduced surface area, then the sensing sensitivity is enhanced, but the number of sensing lines required increases
Solution Approach 1:
The sensing lines are designed to serve multiple sensor units simultaneously. By increasing the width of the second sensor unit to extend into the non-display area, the same sensing lines can detect inputs across both the display and non-display areas, reducing the need for additional dedicated sensing lines while maintaining enhanced sensitivity.
Data Source
AI summary
A display device includes a display layer on which a display area and a non-display area adjacent to the display area are defined and a sensor layer on which a plurality of sensor units are defined. The plurality of sensor units includes a first sensor unit overlapping the display area and a second sensor unit overlapping the display area and the non-display area. The second sensor unit includes a first portion and a second portion expanded from the first portion, and the first portion has a shape that is the same as a shape of which a portion is removed from the first sensor unit, and a width of the second sensor unit in a first direction is greater than a width of the first sensor unit in the first direction.