Signal Line Capacitance Uniformity in Display Input Sensing
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Solution Overview
Problem
Display devices with input sensing functions face issues due to differences in capacitance between signal lines and the electrode layer, leading to deteriorated sensing sensitivity.
Innovation Solution
The display device incorporates an input sensing layer with multiple sensing electrodes and signal lines of varying lengths and widths, where each signal line has a unique distance to the electrode layer, ensuring uniform capacitance across all lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If signal lines have different lengths and widths, then routing flexibility is improved, but capacitance difference between signal lines increases
Solution Approach 1:
The patent applies local quality by adjusting the distance between signal lines and the electrode layer based on specific line characteristics. Different signal lines are positioned at different distances from the electrode layer, creating localized variations in capacitance that compensate for differences in line length and width, thereby achieving uniform overall capacitance across all signal lines.
Solution Approach 2:
The patent changes the spatial parameter (distance from electrode layer) of signal lines to control and balance capacitance values. By varying this distance parameter, the patent compensates for differences in other parameters such as line length and width, ensuring uniform capacitance while maintaining routing flexibility.
2Reliability
If signal lines are positioned at different distances from the electrode layer, then capacitance uniformity is improved, but structural complexity increases
Solution Approach 1:
The patent implements local quality by positioning signal lines at different distances from the electrode layer based on their specific requirements. This localized adjustment achieves uniform capacitance across the structure without requiring complete redesign of the entire system, thereby managing structural complexity while improving capacitance uniformity.
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
This configuration effectively reduces or eliminates capacitance differences, thereby enhancing the sensing sensitivity and accuracy of the input sensing layer.
Implementation Method 1
a first signal line having a length different from a length of the second signal line, where a distance between the first signal line and the electrode layer is different from a distance between the second signal line and the electrode layer
Data Source
AI summary
A display device includes a display panel configured to display an image. The display panel includes an electrode layer. An input sensing layer is disposed on the display panel. The input sensing layer includes a plurality of sensing electrodes including a first sensing electrode and a second sensing electrode. A plurality of signal lines is electrically connected to the plurality of sensing electrodes. The plurality of signal lines includes a first signal line electrically connected to the first sensing electrode and a second signal line electrically connected to the second sensing electrode. The first signal line has a length different from a length of the second signal line. A distance between the first signal line and the electrode layer is different from a distance between the second signal line and the electrode layer.