Flexible Display Cushion Structure for Sensor Damage Protection
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Solution Overview
Problem
Existing flexible electroluminescent display devices face challenges in reducing the bezel area while ensuring the flexibility of insulating layers and wiring lines, and the insertion of sensors can cause physical damage to the display panel, degrading image quality.
Innovation Solution
A flexible display device design that includes a display panel with a bending area, a first back plate, a cushion tape, a heat radiation sheet, and a second cushion tape to absorb external damage, enhancing damage resistance and improving the yield of sensor mounting processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hole is formed on the rear surface of the display panel to embed sensors, then sensor functionality is achieved, but physical damage is applied to the display panel causing image quality degradation
Solution Approach 1:
A cushioning layer is positioned between the rear surface of the display panel and the sensor to be embedded. This cushioning layer absorbs the physical damage during the sensor embedding process, preventing direct contact between the sensor and the display panel, thereby maintaining image quality while enabling sensor functionality.
2Area of moving object
If the bezel area is reduced by bending the non-display area, then the effective display screen size is increased, but the flexibility of insulating layers and wiring lines is compromised
Solution Approach 1:
A cushioning layer is disposed in the non-display area to absorb physical damage during bending operations. This protects the wiring lines and insulating layers from cracks and damage while enabling the bezel area to be reduced through bending, thus maintaining both the effective display screen size and the reliability of internal components.
Solution Approach 2:
The cushioning layer changes the mechanical properties of the non-display area by providing a compliant layer that absorbs stress during bending. This allows the structure to flex without compromising the wiring lines and insulating layers, enabling bezel reduction while maintaining flexibility and reliability.
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 improves the flexibility and durability of the display device, reducing bezel area and minimizing image quality degradation from sensor insertion, thereby enhancing the overall performance and reliability of the flexible display.
Implementation Method 1
a second cushion tape which is disposed below the heat radiation sheet and absorbs a damage from the outside
Data Source
AI summary
According to an aspect of the present disclosure, a flexible display device includes: a display panel which includes a display area and a bending area extending from one side of the display area to be bent; a first back plate disposed on a rear surface of the display area; a first cushion tape disposed on a rear surface of the first back plate; a heat radiation sheet disposed on a rear surface of the first cushion tape; a second cushion tape which is disposed below the heat radiation sheet and absorbs a damage from the outside; and a bottom hole which passes through the first cushion tape, the heat radiation sheet, and the second cushion tape.