Multilayer Input Sensor Electrodes for Precise Display Touch Detection
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Solution Overview
Problem
Existing display devices lack improved sensitivity in input sensors, which affects the accuracy and responsiveness of user input detection.
Innovation Solution
The display device incorporates an input sensor with a design that includes first and second sensing electrodes of different lengths, bridge patterns, and insulating layers to enhance sensitivity, allowing for improved signal reception and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional sensing electrode designs are used, then device complexity is reduced, but sensitivity and detection precision deteriorate
Solution Approach 1:
The sensing electrode is divided into multiple segments including first sensing electrodes, second sensing electrodes, first bridge patterns, and second bridge patterns. These segmented components are arranged in a grid-like structure with signal line groups, allowing independent optimization of each segment's function while collectively improving overall sensitivity without excessive complexity
Solution Approach 2:
The patent introduces a multi-layer structure where sensing electrodes and bridge patterns are arranged on different layers (first layer, second layer, third layer). This dimensional arrangement allows signal lines to connect to multiple sensing electrodes simultaneously, enhancing detection capability while organizing complexity in the vertical dimension rather than horizontal plane
2Measurement precision
If sensing electrode length is increased to improve detection, then sensitivity improves, but device area increases
Solution Approach 1:
The patent implements a nested structure where first bridge patterns are positioned within regions defined by second sensing electrodes, and second bridge patterns are positioned within regions defined by first sensing electrodes. This nesting allows multiple sensing functions to occupy overlapping spatial regions, effectively increasing detection sensitivity without proportionally increasing the overall device area
Solution Approach 2:
The sensing system dynamically switches between different electrode configurations and signal line groups depending on the touch input location and type. This dynamic activation allows the system to use only the necessary sensing regions for each specific input, improving sensitivity where needed while minimizing the effective area consumed
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 input sensor design improves the sensitivity and accuracy of user input detection, providing better responsiveness and reliability in touch-based interactions.
Implementation Method 1
one of the first sensing electrodes or the second sensing electrodes is configured to receive a sinusoidal signal
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
A display device including a display panel and an input sensor disposed on the display panel and including signal line groups arranged in a wiring region, and first and second sensing electrodes disposed in a sensing region, each of the first and second sensing electrodes having one end electrically connected to a corresponding signal line, in which the second sensing electrodes have a greater length than the first sensing electrodes, the signal line groups include first and second signal line groups electrically connected to the first and second sensing electrodes, respectively, each of the first sensing electrodes includes first bridge patterns overlapping the second sensing electrodes and disposed on a different layer from the second sensing electrodes, and one of the first sensing electrodes or the second sensing electrodes are configured to receive a sinusoidal signal.