OLED Blocking Member for UV Glue Overflow Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing technologies face challenges in accurately controlling the overflow of ultraviolet (UV) glue in the bending area of display panels, leading to potential cracks and instability during the bending process of OLED display panels, especially when trying to create narrow frame products.
Innovation Solution
The implementation of a blocking member formed on the surface of the transistor array substrate between the reinforcement layer and the light emitting functional layer, using materials like polyimide or insulating organic/inorganic compounds, which prevents UV glue overflow and maintains stability by being connected to the touch panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large amount of UV glue is coated on the bending area of the pad, then the bending area is reinforced to avoid cracks, but the UV glue overflows into the active area causing bubbles when attaching polarizers
Solution Approach 1:
The bending area is divided into multiple sub-areas with different reinforcement needs. The first bending area receives UV glue for reinforcement, while the second bending area uses a blocking member to prevent glue overflow. This segmentation allows differential treatment of adjacent regions to achieve both reinforcement and precision control.
Solution Approach 2:
A blocking member is introduced as an intermediary element between the UV glue coating process and the active area. This blocking member acts as a physical barrier that mediates the interaction between the glue and the active area, preventing harmful overflow while allowing the glue to perform its reinforcement function in the bending area.
2Manufacturing precision
If the coating machine adjusts the UV glue coating to reduce overflow, then less glue is applied, but the bending area reinforcement is insufficient and cracks may occur
Solution Approach 1:
The solution segments the bending area into two distinct zones: a first bending area that receives full UV glue coating for maximum reinforcement, and a second bending area that uses a blocking member to contain the glue. This allows the system to maintain high glue application in critical areas while preventing overflow in adjacent areas.
Solution Approach 2:
The blocking member serves as an intermediary structure that enables the coating machine to apply sufficient UV glue to the bending area without causing overflow into the active area. It mediates between the need for strong reinforcement and the need for precise overflow control.
3Reliability
If UV glue is applied to reinforce the pad bending area, then crack resistance is improved, but the fluidity of UV glue causes uncontrolled overflow
Solution Approach 1:
The blocking member is introduced as a physical intermediary that constrains the fluid UV glue within the desired bending area. This blocking member allows the glue to maintain its fluidity for proper adhesion and crack resistance while preventing uncontrolled overflow into the active area, thus improving ease of operation.
Solution Approach 2:
The solution applies different qualities to different locations: the bending area receives fluid UV glue with high adhesion properties for crack resistance, while the active area is protected by a blocking member that creates a local boundary condition preventing glue intrusion. This local differentiation resolves the contradiction between reliability and ease of operation.
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 solution effectively controls the UV glue overflow, enhancing the accuracy of glue distribution and preventing cracks, thereby ensuring the stability and functionality of OLED display panels during bending.
Implementation Method 1
the bending area of the pad may be reinforced to avoid the cracks in the bending area of the pad during bending
Implementation Method 2
a blocking member formed on a surface of the transistor array substrate and located between the reinforcement layer and the light emitting functional layer
Data Source
AI summary
An organic light emitting diode (OLED) display panel and a display device are provided. The OLED display panel includes a light emitting functional layer and a display area disposed on a transistor array substrate. The reinforcement layer is formed on a surface of a bending area of the transistor array substrate. A blocking member is formed on a surface of the transistor array substrate and located between the reinforcement layer and the light emitting functional layer. By providing the blocking member, the control accuracy of the amount of glue overflow in the bending area is improved.