Display Window Ink Layer Structure for Rework-Resistant Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The rework process for electronic apparatus manufacturing can cause damage or smearing of ink on windows due to physical or chemical treatments, leading to defects and increased costs.
Innovation Solution
An electronic apparatus design featuring a window with a bezel region including a semi-transmission and non-transmission region, and a display panel under the window, with a light blocking pattern and ink layers of varying densities to enhance durability and chemical resistance, and a manufacturing method involving controlled curing of ink layers to improve process reliability and productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If physical or chemical treatment is performed on the window surface to enable rework bonding, then bonding capability is improved, but ink damage and smearing occur
Solution Approach 1:
A release layer is introduced as an intermediary between the window and the adhesive layer. This release layer enables the adhesive to bond to the window surface while providing a controlled interface that prevents direct chemical interaction between the adhesive and the ink pattern, thereby preventing ink damage during bonding operations
Solution Approach 2:
The release layer is applied to the window surface before the adhesive layer is introduced. This preliminary action prepares the surface in advance to receive the adhesive while protecting the underlying ink pattern from direct exposure to harmful chemical treatments, enabling subsequent bonding without ink damage
2Ease of manufacture
If a single-layer ink structure is used, then manufacturing simplicity is maintained, but durability and chemical resistance are insufficient
Solution Approach 1:
The ink structure is segmented into multiple functional layers: a first ink layer providing base coloration and a second ink layer with different optical properties for enhanced durability and chemical resistance. Each layer serves specific functions, allowing the system to achieve superior reliability while maintaining manufacturability through sequential deposition processes
Solution Approach 2:
The ink structure employs composite material architecture with multiple layers having different compositions and properties. The first ink layer and second ink layer are composed of different materials with complementary characteristics, creating a composite structure that delivers enhanced durability and chemical resistance compared to single-layer alternatives
3Strength
If adhesive layer is directly applied to the window, then bonding strength is improved, but ink smearing and damage occur
Solution Approach 1:
The release layer serves as a mediator between the adhesive layer and the window surface. It allows the adhesive to achieve strong bonding to the window while preventing direct contact between the adhesive and the ink pattern, thereby eliminating ink smearing and damage that would otherwise occur with direct adhesive application
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 design and manufacturing method result in improved durability, chemical resistance, and process reliability, reducing the risk of ink damage and enhancing the aesthetic appeal of the electronic apparatus.
Implementation Method 1
a second ink layer disposed under the first ink layer, having a density lower than that of the first ink layer
Implementation Method 2
having a light transmittance of about 90% or more in a wavelength range of about 540 nm
Implementation Method 3
a manufacturing method involving controlled curing of ink layers
Data Source
AI summary
An electronic apparatus including a window including a bezel region including a semi-transmission region and a non-transmission region surrounding the semi-transmission region, and a transmission region adjacent to the bezel region, and a display panel disposed under the window. The window includes a base substrate, a light blocking pattern overlapping the non-transmission region, and an ink layer overlapping the semi-transmission region. The ink layer includes a first ink layer disposed under the base substrate, and a second ink layer disposed under the first ink layer, having a density lower than that of the first ink layer, and having a light transmittance of about 90% or more in a wavelength range of about 540 nm.