Adjustable Adhesive Pattern for Bubble-Free Display Attachment
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Solution Overview
Problem
Existing display devices face challenges in freely controlling the adhesive force of attaching and detaching windows and facilitating the removal of bubbles during the attachment and detachment process.
Innovation Solution
A display device with a detachable pattern that applies an adhesive force of 0.1 × 0.00980664999999998 N /25mm to 500 × 0.00980664999999998 N /25mm, utilizing an adhesion reduction layer to enhance the slip property and prevent bubble formation, allowing for easy attachment and detachment of the window structure or touch screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a window is bonded to the touch screen using OCA or ultraviolet curable adhesive, then the window is firmly fixed and protected, but the adhesive force cannot be freely adjusted and bubble removal is difficult
Solution Approach 1:
The adhesive layer is divided into multiple regions with different adhesive strengths: a first adhesive region with stronger adhesive force and a second adhesive region with weaker adhesive force. This segmentation allows different parts of the window to have different bonding characteristics, enabling both strong fixation and easy detachment in specific areas for bubble removal.
Solution Approach 2:
Different regions of the adhesive layer are assigned different adhesive properties. The first adhesive region provides strong bonding for secure attachment, while the second adhesive region provides weaker bonding to facilitate bubble removal and detachment operations. This local differentiation of adhesive quality resolves the contradiction between strong fixation and adjustability.
2Reliability
If the window is firmly bonded to the touch screen, then protection is improved, but detachment and bubble removal become difficult
Solution Approach 1:
The adhesive layer is segmented into a first adhesive region for strong bonding that ensures reliable protection, and a second adhesive region with weaker bonding that enables easy detachment and bubble removal. This segmentation allows the system to simultaneously achieve both reliable protection and ease of operation.
Solution Approach 2:
The second adhesive region is designed to be easily detached and can be recovered or repositioned. This allows bubbles to be removed by detaching and reattaching the window in the second adhesive region without compromising the overall protective function provided by the first adhesive region.
3Reliability
If the adhesive force is increased for secure attachment, then reliability is improved, but bubble formation increases and removal becomes difficult
Solution Approach 1:
The adhesive layer is segmented into regions with different adhesive strengths. The first adhesive region provides strong bonding for reliable attachment, while the second adhesive region provides weaker bonding that allows air to escape and bubbles to be removed during the attachment process, preventing bubble formation issues.
Solution Approach 2:
Different regions of the adhesive layer have different adhesive qualities: the first adhesive region has high adhesive strength to prevent reliable attachment, while the second adhesive region has low adhesive strength to allow bubble removal. This local quality differentiation resolves the contradiction between secure attachment and bubble prevention.
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 solution allows for adjustable adhesive force and effective bubble removal, enabling easy and bubble-free attachment and detachment of the window structure or touch screen, simplifying the manufacturing process and enabling diverse design options.
Implementation Method 1
an adhesive layer (e) and a cured layer (f) formed by curing the adhesive layer
Implementation Method 2
heating at a temperature of 100-250°C for a duration of 30 seconds to 10 minutes
Implementation Method 3
an adhesion reduction layer (16) on the touch screen (14), the detachable pattern (18) increases a slip property by being disposed on the adhesion reduction layer (16)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Presented is a display device having an attachable/detachable pattern of which an adhesive force to be attached and detached is freely adjusted and which facilitates removal of bubbles. The display device, having an attachable/detachable pattern, comprising a window and a display and selectively comprising a touch screen includes an attachable/detachable pattern positioned on any one of the window, the touch screen, and the display and having an adhesive force of 0.1gf/25mm to 500gf/25mm, wherein the attachable/detachable pattern includes an adhesive layer and a curing layer, the adhesive layer occupying an area of 5-95% in the attachable/detachable pattern.