Mobile Terminal Adhesive Segmentation for Compact Display Repair
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Solution Overview
Problem
Mobile terminals with larger display units face the challenge of increased overall size due to the bezel in the edge portion of the display module, making it difficult to design a compact device while allowing for efficient repair of the display unit.
Innovation Solution
A mobile terminal design featuring a first film with a weaker adhesive material attached to the back of the display unit and a second film with a stronger adhesive material attached to the front case, allowing for easy separation of the display unit from the case without damaging it, and incorporating a non-attaching end for easier handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display unit is made larger, then the display area is increased, but the overall size of the mobile terminal increases
Solution Approach 1:
The adhesive system is segmented into two distinct films with different adhesive strengths. The first film provides strong bonding between the display unit and front case, while the second film provides controlled adhesion that allows easy separation. This segmentation enables the display unit to be firmly attached during use but easily separated for repair, effectively addressing the size constraint while maintaining repairability.
Solution Approach 2:
Different regions of the adhesive system have different adhesive properties. The first adhesive material has high adhesive strength for permanent bonding, while the second adhesive material has low adhesive strength for easy separation. This local differentiation in adhesive quality allows the system to simultaneously achieve strong attachment and easy disassembly, enabling compact design without compromising repairability.
2Strength
If a strong adhesive is used to attach the display unit to the front case, then the bonding strength is increased, but the ease of separation for repair is reduced
Solution Approach 1:
The adhesive system is divided into two separate films: the first film with high adhesive strength for secure bonding, and the second film with low adhesive strength for easy separation. This segmentation allows the system to simultaneously achieve strong attachment during use and easy disassembly for repair, directly resolving the contradiction between bonding strength and ease of repair.
Solution Approach 2:
The adhesive strength parameter is differentiated across two films. The first adhesive material exhibits high adhesive strength (e.g., 100-500 gf/in), while the second adhesive material exhibits low adhesive strength (e.g., 1-10 gf/in). This parameter change enables the system to provide both strong bonding and easy separation, resolving the contradiction between these opposing requirements.
3Area of stationary object
If the bezel size is reduced, then the display area is increased, but the structural integrity and attachment stability are compromised
Solution Approach 1:
The adhesive attachment system is segmented into two films with complementary functions. The first film provides strong bonding to maintain structural integrity even with reduced bezel size, while the second film allows for controlled separation. This segmentation enables the system to maintain reliability with compact design by ensuring stable attachment during use while enabling easy separation for repair.
Solution Approach 2:
The adhesive system uses composite material structure with two different adhesive materials having distinct properties. The first adhesive material provides high strength bonding for structural integrity, while the second adhesive material provides low strength bonding for easy separation. This composite approach allows reduced bezel size while maintaining attachment stability during normal use.
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 design reduces the bezel size around the display module, enabling a more compact mobile terminal while allowing for efficient and damage-free separation and repair of the display unit.
Implementation Method 1
a first film (200) having one surface coated with a first adhesive material (202), the other surface coupled to a back surface of the display unit (151) by the first adhesive material
Implementation Method 2
a second film (250) having one surface coated with a third adhesive material (253) and the other surface coated with a second adhesive material (252), the second film (250) disposed between the front case (101) and the first film (200)
Data Source
AI summary
There is disclosed a mobile terminal including a display unit, a first film having one surface coated with a first adhesive material, the surface coupled to a back surface of the display unit by the first adhesive material, and a front case having a second adhesive material disposed on one surface thereof, the surface coupled to the other surface of the first film by the second adhesive material, wherein an adhesive strength of the first adhesive material is smaller than an adhesive strength of the second adhesive material, such that the back surface of the mobile terminal may be attached to the case to prevent the bezel from increasing.