OLED Backplane Lamination via Magnetic Fixing Layer
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Solution Overview
Problem
Conventional backplane attachment methods for OLED display panels often result in bubbles during the lamination process, leading to damage and inefficiencies due to height differences and uneven surfaces, which affect yield and production rates.
Innovation Solution
A backplane attaching method and device that utilize a flexible substrate with a fixing layer embedded with magnetic particles, allowing the roller to attract and smoothly laminate the backplane, avoiding bubbles and ensuring even pressure distribution, while the magnetic particles are strategically distributed to prevent interference with cutting processes and circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the roller rolls to the binding area during backplane attachment, then the attachment process can be completed, but the OLED panel will be broken due to height difference
Solution Approach 1:
The patent applies local quality by creating a localized recessed region in the binding area of the OLED panel. This recessed region specifically addresses the height difference problem only in the binding area, while the rest of the panel maintains its original structure. The roller can now roll over the binding area without damaging the OLED panel, as the recessed region provides a lower surface that accommodates the roller's path.
2Reliability
If the roller does not roll to the binding area, then the OLED panel is protected from damage, but bubbles will form in the backplane attachment
Solution Approach 1:
The recessed region creates a localized area with different surface properties. This local modification allows the roller to contact and press the backplane in the binding area without damaging the OLED panel. The roller's pressure is now applied to the recessed surface rather than the elevated binding area, enabling complete coverage and eliminating bubbles while protecting the panel.
3Manufacturing precision
If fixtures are used to solve the uneven surface problem, then the binding area can be supported, but the solution becomes complex and difficult to implement
Solution Approach 1:
Instead of adding external fixtures to support the uneven binding area from the outside, the patent inverts the approach by modifying the panel itself to create a recessed region. This internal modification eliminates the need for complex external support structures. The recessed region naturally provides the needed support and surface uniformity, simplifying the overall attachment process and reducing 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
The method effectively prevents bubble formation and damage to the OLED panel by using magnetic attraction for smooth lamination, maintaining panel integrity and improving manufacturing efficiency.
Implementation Method 1
the roller and the magnetic particles are attractive to each other
Data Source
AI summary
An organic lighting-emitting diode (OLED) display panel, a backplane attaching method and a backplane attaching device are provided. The OLED display panel includes: a flexible substrate, and a thin film transistor layer and a light-emitting layer prepared on the flexible substrate. The flexible substrate includes a first flexible substrate layer, a fixing layer and a second flexible substrate layer sequentially stacked one another. The fixing layer includes an organic film layer and magnetic particles embedded in the organic film layer. The magnetic particles are located in an internal of the flexible substrate.