Recessed Touch Sensor Substrate for Display Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch sensors in display devices face challenges in sensitivity, particularly for fingerprint recognition, due to the thickness of the substrate affecting the strength and visibility, which impacts the ability to accurately detect touch and fingerprint patterns.
Innovation Solution
A display device design that reduces the substrate thickness, incorporates a recessed touch sensor arrangement with adhesive layers and flexible substrates to enhance sensitivity and strength, and includes a fingerprint sensor for improved recognition capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the substrate thickness is reduced to decrease the distance between the touch sensor and user's finger, then the sensitivity of touch and fingerprint detection is improved, but the strength of the substrate decreases
Solution Approach 1:
The substrate is divided into two distinct regions: a first region with a greater thickness to provide structural strength, and a second region with a smaller thickness to enhance touch sensor sensitivity. This segmentation allows each region to fulfill its specific function without compromising the other.
Solution Approach 2:
Different thickness characteristics are applied to different locations of the substrate. The first region maintains greater thickness for strength, while the second region has reduced thickness for sensitivity, creating local quality variations optimized for specific functional requirements.
2Measurement precision
If the substrate thickness is reduced to decrease the distance between the touch sensor and user's finger, then the sensitivity of touch and fingerprint detection is improved, but the visibility at the thinner portion of the substrate increases
Solution Approach 1:
The substrate exhibits local quality variations in thickness, with the second region having reduced thickness to improve sensor sensitivity while the first region maintains greater thickness to control visibility and aesthetic appearance.
Solution Approach 2:
The solution transitions from a uniform two-dimensional substrate to a three-dimensional structure with varying thickness, allowing simultaneous optimization of sensitivity (in the thinner region) and visibility control (in the thicker region).
3Measurement precision
If the substrate thickness is reduced to decrease the distance between the touch sensor and user's finger, then the sensitivity of touch and fingerprint detection is improved, but the manufacturing complexity increases
Solution Approach 1:
The substrate manufacturing process is segmented into regions with different thickness characteristics, allowing for specialized fabrication techniques to be applied to each region independently, thereby managing complexity through systematic division.
Data Source
AI summary
A display device includes a display panel displaying an image on one surface thereof, a substrate including a first surface and a second surface, wherein the first surface faces the display panel, and a first touch sensor provided between the display panel and the substrate, wherein the substrate includes a recess on the first surface, and the first touch sensor is arranged on at least a portion of the recess.