Stepped Film Support Jig for Smooth Display Coating Windows
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Solution Overview
Problem
Existing display device manufacturing methods face challenges in stabilizing a transparent film and preventing surface unevenness from being transferred to the coating window, which affects the quality of the display device.
Innovation Solution
A jig with a stepped portion is used to support a transparent film, ensuring low surface roughness of the stepped portion to prevent unevenness transfer. The jig includes a first and second stepped portion, with the second portion corresponding to the shape of the notch portion, and an average surface roughness of 50 nm or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a transparent film is supported on a flat surface during coating, then the coating process is simple, but surface unevenness is transferred to the coating window
Solution Approach 1:
The support surface is segmented into multiple stepped portions (first stepped portion, second stepped portion, third stepped portion) at different heights, each supporting a specific region of the transparent film. This segmentation allows the film to be stabilized without requiring a completely flat support surface, preventing surface unevenness transfer while maintaining manufacturing feasibility
Solution Approach 2:
Different regions of the support surface are given different heights and roughness characteristics tailored to their specific functions. The second stepped portion has low surface roughness (50 nm or less) to prevent unevenness transfer to the coating window, while other portions can have different characteristics optimized for their respective support requirements
2Manufacturing precision
If the transparent film is stabilized using a complex support structure, then surface unevenness transfer is prevented, but the manufacturing cost increases
Solution Approach 1:
The support structure is divided into three distinct stepped portions with different heights and functions, allowing each portion to be optimized independently while maintaining overall structural simplicity and manufacturing efficiency
Solution Approach 2:
The stepped portions act as intermediary support elements between the coating substrate and the transparent film, providing localized stabilization without requiring a completely complex support system. The second stepped portion specifically mediates between the film and the coating window to prevent surface unevenness transfer
Data Source
AI summary
Provided is a jig including a stage including a resting groove in which a display module and a transparent film are rested, where a side of a notch portion defined in the display module is recessed in a plan view, and the transparent film is disposed on the display module, covers the display module, and comprises an upper surface coated with a transparent resin material. The jig includes a first stepped portion protruding from an inner surface of the stage defining the resting groove toward a center of the resting groove, and a second stepped portion protruding from the first stepped portion toward the center of the resting groove. An upper surface of the first stepped portion and an upper surface of the second stepped portion are parallel to a plane, and a shape of the second stepped portion corresponds to a shape of the notch portion.