Bridge Electrode Thermal Uniformity in Flexible Display Array Substrates
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Solution Overview
Problem
Conventional flexible display panels face inaccuracies in pressure detection due to non-uniform temperature distribution across bridge electrodes, leading to errors in output voltage.
Innovation Solution
Incorporating a first heat conductive sheet opposite to the bridge electrode with a vertical projection covering it, ensuring uniform heat and temperature distribution, and optionally a second heat conductive sheet for further temperature uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bridge electrodes are arranged on the array substrate for pressure sensing, then pressure detection function is integrated, but temperature non-uniformity causes output voltage inaccuracy
Solution Approach 1:
A heat conductive sheet is introduced as an intermediary component between the bridge electrode and the array substrate. This sheet mediates the thermal environment by conducting and distributing heat uniformly across the bridge electrode region, thereby eliminating temperature non-uniformity that causes measurement errors while preserving the pressure detection function
Solution Approach 2:
The thermal conductivity parameter of the array substrate is enhanced by introducing the heat conductive sheet with superior thermal conduction properties. This parameter change transforms the thermal field distribution from non-uniform to uniform, resolving the contradiction between maintaining pressure sensing capability and ensuring measurement accuracy
2Measurement precision
If heat conductive sheet is added to uniform temperature distribution, then measurement precision is improved, but device complexity increases
Solution Approach 1:
A thin film heat conductive sheet is used instead of a bulky thermal management structure. This thin film approach achieves uniform temperature distribution across the bridge electrode while minimizing additional device complexity, as the sheet can be integrated into the existing array substrate structure with minimal modification
Solution Approach 2:
The array substrate is enhanced by combining it with a heat conductive sheet to form a composite structure. This composite material approach integrates thermal management functionality into the existing device structure, achieving temperature uniformity without significantly increasing overall device complexity
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 arrangement reduces the influence of non-uniform temperature on the output voltage, enhancing the accuracy of pressure detection in flexible display devices.
Implementation Method 1
the heat conductivity of the first heat conductive sheet makes heat distribution of the first heat conductive sheet uniform, and further makes the temperature distribution of the region corresponding to the bridge electrode uniform
Data Source
AI summary
An array substrate, a display panel and a display device are provided. The array substrate includes a display region and a frame region surrounding the display region. The frame region includes multiple bridge pressure sensing units and multiple first heat conductive sheets. Each of the multiple bridge pressure sensing units includes a bridge electrode, a first power supply line electrically connected to a power supply terminal of the bridge electrode, and a detection line electrically connected to a detection terminal of the bridge electrode. Each of the multiple first heat conductive sheets is arranged opposite to the bridge electrode, and a vertical projection of the first heat conductive sheet on the bridge electrode covers the bridge electrode.