Flexible Display Panel Cushioning for Under-Display Camera Holes
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Solution Overview
Problem
Flexible electroluminescent display devices face challenges in reducing the bezel area while ensuring the integrity of the display panel, particularly when embedding sensors, as physical damage during the sensor insertion process can degrade image quality in the area with a formed hole.
Innovation Solution
A flexible display device design that includes a display panel with a bending area, a first back plate, cushion tapes, and a heat radiation sheet, featuring a bottom hole with a second cushion tape to absorb external damage, thereby improving the yield of sensor mounting processes and maintaining image quality.
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 the sensor embedding function is improved, but physical damage during insertion degrades image quality
Solution Approach 1:
A cushioning layer is formed in advance at the rear surface of the display panel, specifically in the area where the hole will be formed for sensor embedding. This cushioning layer acts as a protective buffer that absorbs physical damage during the sensor insertion process, preventing the damage from reaching and degrading the image quality of the display panel.
2Area of stationary object
If the bezel area is reduced by bending the non-display area, then the effective display screen size is improved, but the structural integrity and flexibility are compromised
Solution Approach 1:
The patent employs flexible substrate materials and thin film structures that allow the non-display area to be bent while maintaining structural integrity. The flexible nature of these components enables the bezel area to be reduced through bending without compromising the overall structural stability or causing cracks.
3Reliability
If cushioning layers are added to protect against damage, then the damage absorption is improved, but the device complexity increases
Solution Approach 1:
Instead of adding cushioning layers throughout the entire display panel, the patent applies cushioning only in the specific local area where the hole is formed for sensor embedding. This localized approach provides the necessary damage absorption protection while minimizing the increase in overall device complexity and structural bulk.
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 damage absorption in the display panel, reducing the bezel area effectively and improving the yield of sensor insertion processes, thus maintaining image quality and flexibility.
Implementation Method 1
a second cushion tape which is disposed below the heat radiation sheet and absorbs a damage from the outside
Implementation Method 2
a heat radiation sheet disposed on a rear surface of the first cushion tape
Implementation Method 3
a heat radiation sheet disposed on a rear surface of the first cushion tape
Data Source
AI summary
According to an aspect of the present disclosure, a flexible display device includes: a flexible substrate including a bottom hole in a display area and including a bending area in a non-display area surrounding the display area; a transistor disposed on the flexible substrate; a planarization layer disposed on the transistor; a connecting electrode disposed on the planarization layer; an encapsulating unit disposed on the connecting electrode; a micro coating layer disposed on the bending area of the flexible substrate; a plurality of back plates disposed below the flexible substrate; and a camera disposed on a lower part of at least one of the plurality of back plates and disposed in the bottom hole of the display area.