Cover Window Curving via Segmented Press and Local Heating
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Solution Overview
Problem
Conventional display apparatus manufacturing methods often result in defects in the cover window due to irregular pressure application, particularly when forming curved or bent designs, leading to potential wave patterns and reduced image quality.
Innovation Solution
A display apparatus manufacturing apparatus and method that utilizes a deforming unit with a first mold, a sleeve, and a second mold, along with a pressing plate, to apply uniform pressure and heat to the cover window, allowing for precise shaping and cooling to minimize defects and ensure consistent curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional manufacturing method is used to form curved cover window, then shaping capability is improved, but pressure uniformity deteriorates causing wave patterns and defects
Solution Approach 1:
The pressing mechanism is segmented into multiple independent pressing members (first pressing member, second pressing member, third pressing member) that can apply pressure to different regions of the cover window separately. This segmentation allows each pressing member to independently adjust pressure distribution, ensuring uniform pressure across the entire curved surface and preventing wave patterns during the forming process.
2Ease of manufacture
If heating is applied to enable cover window deformation, then formability is improved, but temperature control difficulty increases leading to potential defects
Solution Approach 1:
The heating mechanism uses multiple independent heating members (first heating member, second heating member, third heating member) positioned at different locations on the cover window. Each heating member can independently control the temperature of its local region, ensuring uniform temperature distribution across the entire cover window surface. This local quality control prevents thermal gradients that could cause deformation defects while maintaining the overall deformability needed for curved shaping.
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 effectively reduces fabrication defects and ensures a uniform pressure distribution, preventing wave patterns at bent portions, resulting in improved image quality and precise fabrication of the cover window.
Implementation Method 1
the pressing plate may include a heater which heats the cover window
Implementation Method 2
the display apparatus manufacturing apparatus may further include a cooler which cools the cover window transferred from the deforming unit
Data Source
AI summary
An apparatus for manufacturing a display apparatus includes a deforming unit which deforms a shape of a cover window by pressing the cover window, where the deforming unit includes a first mold, on which the cover window is accommodated; a sleeve, which is spaced apart from the first mold and moves linearly to the first mold; a second mold, which is inserted into the sleeve to move linearly to the first mold to deform a portion of the cover window; and a pressing plate, which presses the sleeve and the second mold to the first mold.