Variable-Width Printing Pad for Clear Angled-Window Patterns
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Solution Overview
Problem
Existing methods for forming patterns on electronic device windows result in unclear patterns and high defect rates, particularly when the window has side portions bent at angles of 90° or greater.
Innovation Solution
A printing pad with specific geometric and material properties, including a first portion with a decreasing width and a second portion with an increasing width, is used to apply ink to windows, allowing for clear pattern formation even on angled surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional printing pad is used to apply ink to the window, then the printing process can be completed, but the pattern is unclear and there are unprinted portions especially on angled surfaces
Solution Approach 1:
The patent changes the geometric parameters of the printing pad by introducing a tapered second portion with increasing width from the first upper surface toward the second upper surface. This parameter change allows the printing pad to adapt to angled window surfaces (90° or greater), ensuring complete ink transfer and eliminating unprinted portions, thereby improving both pattern clarity and reducing defect rates
Solution Approach 2:
The patent applies local quality by creating two distinct portions with different width characteristics: the first portion maintains a relatively consistent width for general printing, while the second portion features an increasing width specifically designed to contact angled window surfaces. This localized structural differentiation ensures optimal printing performance on both flat and angled surfaces
2Ease of operation
If the printing pad contacts angled window surfaces (90° or greater), then printing can be performed, but interference with the angled surface causes unprinted areas
Solution Approach 1:
The patent transitions from a conventional two-dimensional printing pad structure to a three-dimensional tapered structure. The second portion's width increases in the vertical dimension (from first upper surface to second upper surface), creating a dimensional adaptation that enables effective contact with and printing on angled window surfaces without causing unprinted areas
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 printing pad ensures clear pattern formation without unprinted areas and reduces defect rates by minimizing interference with angled window surfaces.
Implementation Method 1
pressurizing the printing pad to which the ink is adhered on a window base portion of the window to provide a printing pattern on the window base portion
Data Source
AI summary
A printing pad includes a bottom surface extending in a plane defined in a first direction and a second direction intersecting the first direction. A first upper surface faces the bottom surface. A first side surface connects the bottom surface and the first upper surface. A second portion is disposed on the first portion and includes a second upper surface facing the first upper surface and a second side surface connecting the first upper surface and the second upper surface. A width of the second portion in the first direction increases from the first upper surface towards the second upper surface.