Segmented Insulating Layer for Flexible Display Touch Integration
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Solution Overview
Problem
Existing OLED display devices face a large parasitic capacitance between the cathode and touch control electrodes, leading to increased load and potential issues with bending performance in flexible display devices.
Innovation Solution
A flexible display device design featuring a flexible insulating layer divided into blocks, positioned between the display panel and touch control unit, which increases the distance between the electrodes and reduces parasitic capacitance, while maintaining display and touch functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the touch control panel is integrated with the OLED display panel, then the integration of touch control function and display function is achieved, but large parasitic capacitance is formed between the cathode and touch control electrodes
Solution Approach 1:
The insulating layer is divided into multiple insulating blocks arranged in an array, each corresponding to touch control electrodes. This segmentation reduces the area of continuous insulating material between the cathode and touch electrodes, thereby reducing parasitic capacitance while maintaining the integrated structure.
Solution Approach 2:
An insulating layer is introduced between the cathode and touch control electrodes to reduce parasitic capacitance. The insulating blocks act as intermediaries that maintain the integrated structure while minimizing harmful electrical coupling between the cathode and touch electrodes.
2Adaptability or versatility
If the flexible display device is designed to be bendable, then flexibility and adaptability are improved, but stress concentration and layer detachment risk increase
Solution Approach 1:
The insulating layer is segmented into multiple blocks rather than being continuous. This segmentation allows the structure to better accommodate bending deformations by distributing stress across discrete elements, reducing stress concentration at specific locations and minimizing layer detachment risk.
Data Source
AI summary
A flexible display device comprises at least one bending area provided with a bending axis and a non-bending area; a flexible display panel having a first surface for displaying images; a flexible insulating layer disposed on the first surface and divided into a plurality of flexible insulating blocks in the at least one bending area; and a touch control unit comprising a first touch control electrode layer in direct contact with the flexible insulating layer. The first touch control electrode layer includes a plurality of first touch control electrodes. Any one of the plurality of flexible insulating blocks corresponds to at least one of the plurality of first touch control electrodes. In a plane of the first surface for displaying images and in a direction perpendicular to the bending axis, a gap between any two adjacent flexible insulating blocks overlaps with a gap between two adjacent first touch control electrodes.