Glass Backside Grooving for Bendable Display Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with bent structures face challenges in reducing the non-display area while maintaining durability, as components like substrates may break in the bending area, leading to reduced yield.
Innovation Solution
A method of manufacturing a display device involves cutting glass into cell units, forming a patterning film on the back surface, exposing the bending area, and creating a groove in the bending area using abrasive particles through a blast process, followed by wet etching to improve durability and reduce chemical by-products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a bent structure is adopted to reduce the non-display area, then the area efficiency is improved, but the substrate may break in the bending area reducing yield
Solution Approach 1:
The glass substrate is segmented by forming grooves that divide the bending area into distinct regions. This segmentation allows the glass to bend without forming a continuous stress concentration path, preventing substrate breakage while maintaining the bent structure's area efficiency.
Solution Approach 2:
The grooves are formed locally in the bending area with specific depth and width characteristics. This local modification of the glass structure creates enhanced flexibility and stress distribution precisely where bending occurs, improving reliability without affecting other areas of the substrate.
2Object-generated harmful factors
If a blast process with abrasive particles is used to form grooves, then chemical by-products are eliminated, but manufacturing complexity increases
Solution Approach 1:
The chemical etching process is replaced with a mechanical blast process using abrasive particles. This substitution eliminates chemical by-products and environmental concerns associated with wet etching, though it requires careful control of blasting parameters to achieve the desired groove geometry.
Solution Approach 2:
The groove formation process transitions from chemical parameter control (etchant concentration, temperature, time) to mechanical parameter control (abrasive particle size, blasting pressure, duration). This parameter change enables cleaner production while requiring precise mechanical process control.
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 method enhances the durability of display devices by preventing substrate breakage during bending and improves the etching distribution and taper angle of the glass, thus reducing the non-display area effectively.
Implementation Method 1
forming a groove overlapping the bending area on the back surface of the glass by providing abrasive particles to the exposed glass
Data Source
AI summary
In a method of manufacturing a display device, the method includes: cutting a glass in cell units, forming a patterning film on a back surface of the glass, patterning the patterning film to expose a bending area of the glass, and forming a groove overlapping the bending area on the back surface of the glass by providing abrasive particles to the exposed glass.