Foldable OLED Support Layer Openings for Mark-Guided Cutting
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Solution Overview
Problem
The existing pad bending and binding process for foldable flexible OLED display modules requires deep slotting of the metal support layer, which reduces its strength and increases the risk of cracking due to collisions with foreign objects.
Innovation Solution
A method involving the formation of marks on both the panel body and mark cutting portion, with a support layer having openings to expose these marks, allowing for laser cutting without deep grooves, and the use of light-transmitting protection layers to ensure accurate alignment and bending without compromising the support layer's integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If deep slotting is performed on the metal support layer to expose marks for CCD positioning, then the marks can be identified for bending and binding, but the strength of the support layer is reduced and the risk of cracking increases
Solution Approach 1:
The patent transitions from horizontal slotting (in the plane of the support layer) to vertical drilling (perpendicular to the support layer). Drill holes are formed through the support layer at positions corresponding to the marks, allowing CCD cameras to capture mark images through the holes from the opposite side. This dimensional change eliminates the need for deep slotting while maintaining mark identification accuracy.
Solution Approach 2:
The support layer is transformed from a solid continuous structure to a porous structure with drill holes. These holes serve as optical channels that allow light to pass through, enabling the CCD camera to detect marks on the opposite side of the support layer without requiring the support layer to be slotted horizontally.
2Strength
If the metal support layer is made non-transparent for structural integrity, then the support strength is improved, but the marks in the non-pad bending and binding region cannot be photographed by the CCD camera
Solution Approach 1:
Drill holes are pre-formed in the support layer at predetermined positions corresponding to the marks before the bending and binding process. This preliminary action creates optical pathways in advance, allowing the CCD camera to photograph marks through the holes without compromising the overall structural integrity of the support layer.
Solution Approach 2:
The drill holes act as intermediaries that mediate between the non-transparent support layer and the CCD camera. Light from the marks passes through these holes, which serve as optical channels, enabling the camera to detect marks while the support layer maintains its non-transparent, structurally sound properties.
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 approach maintains the strength of the support layer, reduces the risk of cracking, and improves the quality of the display panel by eliminating the need for deep slotting and enhancing alignment accuracy during the bending and binding process.
Implementation Method 1
marks in a pad bending and binding region and marks in a non-pad bending and binding region on the panel need to be photographed respectively with a charge coupled device (CCD) (e.g., camera)
Implementation Method 2
cutting the mark cutting portion and the to-be-cut support portion of the display module to form the display panel
Data Source
AI summary
Disclosed are a display panel, a method for manufacturing the display panel, and a mobile terminal, wherein the display panel is obtained after a panel is cut. The panel includes a panel body and a mark cutting portion, a first mark is disposed on the panel body, and a second mark is provided on the mark cutting portion. A support layer is formed on a side away from a light-emitting surface of the panel. The support layer comprises a body support portion and a to-be-cut support portion corresponding to the mark cutting portion, and an opening is disposed on the to-be-cut support portion corresponding to the second mark.