Display Sensor Electrode Asymmetry for Moisture Detection
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Solution Overview
Problem
Existing display devices face challenges in integrating skin moisture measurement functionality due to the need for exposed electrodes, which complicates their application in existing forms, especially in minimizing the visibility of sensor areas.
Innovation Solution
A display device design featuring a display panel with distinct first and second sensor electrode areas, where the first sensor electrodes have bent portions and protrusions, and second sensor electrodes are parallel, allowing for accurate skin moisture measurement while minimizing the visibility of the boundary between these areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If skin moisture measurement function is added to display device, then functionality is improved, but device complexity increases due to exposed electrodes
Solution Approach 1:
The patent combines the skin moisture sensor electrodes with the display panel structure, integrating the sensing function into the existing display device framework. The sensor electrodes are formed within the display panel layers, merging two functions (display and sensing) into a single integrated structure, thereby adding functionality without proportionally increasing overall device complexity.
Solution Approach 2:
The display panel structure is designed to serve multiple functions: it acts as both the display medium and the housing for the skin moisture sensing electrodes. The same physical structure supports both visual output and biological sensing, making the device more versatile without requiring completely separate systems.
2Adaptability or versatility
If sensor device is integrated into display panel, then functionality is improved, but visibility of boundary becomes problematic
Solution Approach 1:
The patent applies different electrode patterns in different regions of the display panel. The first sensor electrodes in the first area have a different shape configuration compared to the second sensor electrodes in the second area. This local differentiation allows the boundary between sensor regions to be minimized or made invisible, as the varying patterns create a more uniform visual appearance across the entire display surface.
Solution Approach 2:
The sensor electrodes are designed with asymmetric patterns where the first sensor electrodes have a different shape from the second sensor electrodes. This asymmetry in electrode configuration helps to mask the boundary between different sensor areas, making the transition imperceptible to users while maintaining functional distinctions between regions.
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 design enhances sensitivity for skin moisture detection and reduces the visibility of the sensor area boundaries, enabling more accurate and aesthetically pleasing integration of skin moisture measurement functionality in display devices.
Implementation Method 1
a first distance between each of the first driving electrodes and an adjacent first sensing electrode may be smaller than a second distance between each of the second driving electrodes and an adjacent second sensing electrode
Data Source
AI summary
A display device includes: a display panel which includes a first area and a second area; and a sensor device which overlaps the first area in a thickness direction of the display panel. The display panel includes first sensor electrodes in the first area and second sensor electrodes in the second area, and a shape of a first sensor electrode of the first sensor electrodes is different from a shape of a second sensor electrode of the second sensor electrodes.