Display Window Pattern Layer for Light Leakage Control
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Solution Overview
Problem
Existing display devices face issues with light leakage and degradation in adhesion due to separate light-blocking patterns, which affect display quality and reliability.
Innovation Solution
A display device with a window module that excludes a separate light-blocking pattern or reduces its thickness, using a pattern layer with a discoloration inducer activated by a laser to create a transparent and discoloration portion with varying light transmittance, which serves as both an adhesive and light-blocking layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate light-blocking pattern is used to prevent light leakage, then light leakage is reduced, but adhesion between the window and display module degrades due to step formation and un-curing issues
Solution Approach 1:
The patent combines the light-blocking function and adhesive function into a single integrated layer. The pattern layer contains both adhesive resin for bonding the window to the display module and light-blocking resin for preventing light leakage, eliminating the need for separate light-blocking patterns and avoiding adhesion degradation caused by steps and un-curing issues.
Solution Approach 2:
The pattern layer uses composite materials consisting of adhesive resin and light-blocking resin in specific weight ratios (light-blocking resin: 1-50 wt%, adhesive resin: 50-99 wt%). This composite structure allows the layer to simultaneously provide both adhesion and light-blocking functions without the harmful effects of separate layers.
2Object-affected harmful factors
If a light-blocking pattern is disposed on the lower surface of the window, then light leakage is prevented, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the light-blocking function into the adhesive pattern layer itself, eliminating the need for separate light-blocking patterns on the window surface. This integration simplifies the window module structure while maintaining effective light leakage prevention.
3Object-affected harmful factors
If a separate light-blocking pattern is used, then light leakage is reduced, but manufacturing precision is compromised due to step formation and un-curing issues
Solution Approach 1:
The patent combines light-blocking and adhesive functions in one layer, eliminating step formation between separate layers and ensuring complete curing throughout the entire pattern layer thickness, thereby improving manufacturing precision and adhesion quality.
Solution Approach 2:
The patent controls the weight ratio of light-blocking resin to adhesive resin within 1-50:50-99 to optimize both light-blocking performance and adhesion quality, ensuring complete UV curing while maintaining effective light leakage 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 enhances display reliability and quality by minimizing light leakage and adhesion degradation, maintaining excellent display performance without a separate light-blocking pattern and reducing the likelihood of separation between the window and pattern layers.
Implementation Method 1
The transparent portion and the discoloration portion may include a discoloration inducer activated by a laser
Implementation Method 2
a discoloration inducer activated by a laser
Data Source
AI summary
A display device includes a window module disposed on a display module. The display module has a peripheral region disposed on at least one side of an active region. The window module includes a pattern layer disposed adjacent to a window and overlapping the active region and the peripheral region. The pattern layer includes a transparent portion and a discoloration portion having a light transmittance lower than that of the transparent portion. Each of the transparent portion and the discoloration portion includes a discoloration inducer activated by a laser, so that the display device exhibits good display quality and excellent reliability properties.