Window Glass Chamfer Coating for Edge Light Leakage Control
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Solution Overview
Problem
Electronic devices with curved window glass surfaces experience light leakage and printing defects at the edges, leading to potential damage and tearing of printed layers due to inaccurate measurements and exposure to metallic housings.
Innovation Solution
A coating layer is applied to the chamfered surfaces of the window glass to cover the end portions, preventing light leakage and reducing the risk of printed layer tearing, while also enhancing structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the window glass has curved portions at the edges, then the aesthetic appearance is improved, but light leakage occurs at the end areas
Solution Approach 1:
The patent applies a coating layer on the second chamfered surface of the window glass that has light-blocking properties. This converts the harmful light leakage effect into a beneficial feature by selectively blocking light paths while maintaining the curved aesthetic shape. The coating transforms the problematic light reflection and leakage into controlled light management.
2Measurement precision
If accurate measurement is performed on the edges of the window glass, then the printed layer positioning is improved, but measurement errors still occur leading to printing defects
Solution Approach 1:
The patent applies a coating layer before the printing process on the second chamfered surface. This preliminary coating creates a defined boundary and reference structure that facilitates more accurate subsequent printing operations. The coating serves as a preparatory step that establishes precise geometric references for the printing process.
Solution Approach 2:
The coating layer acts as an intermediary between the measurement/positioning system and the final printed layer. It provides a stable, well-defined surface that mediates the transfer of positional information, reducing measurement errors and improving the accuracy of printed layer placement.
3Area of stationary object
If the printed layer is formed on the curved portions, then the coverage is improved, but the end of the printed layer becomes vulnerable to tearing and damage
Solution Approach 1:
The patent applies a coating layer on the second chamfered surface before forming the printed layer. This coating layer serves as a cushioning or protective interface that reinforces the printed layer at its vulnerable edges. By providing this preliminary protective layer, the structure prevents tearing and damage that would otherwise occur at the printed layer boundaries.
Solution Approach 2:
The patent creates a composite structure by combining the coating layer with the printed layer on the window glass surface. This composite material approach integrates two different functional layers - the coating provides structural reinforcement and edge protection, while the printed layer provides aesthetic coverage, together achieving both full coverage and enhanced durability.
4Device complexity
If the curved portion of the window glass faces the surrounding housing with a gap, then the structural design is simplified, but the metallic housing may hit the glass plate causing damage
Solution Approach 1:
The coating layer on the second chamfered surface serves as an intermediary protective element between the window glass and the metallic housing. While the structural design maintains the gap for simplicity, the coating layer acts as a buffer or mediator that protects the glass plate from impact damage when the housing contacts the glass during assembly or use.
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 coating effectively reduces light leakage and prevents damage to the printed layers, improving the durability and aesthetic appeal of electronic devices with curved glass surfaces.
Implementation Method 1
a coating layer coated on at least a portion of the second chamfered surface
Data Source
AI summary
According to various embodiments of the disclosure, an electronic device may comprise: a housing and a window glass. The window glass may be coupled to the housing and include a front surface, a rear surface disposed in parallel with at least a portion of the front surface, a side surface, a first chamfered surface extending from the rear surface to the side surface, and a second chamfered surface extending from the front surface to the side surface. The electronic device may comprise a coating layer coated on at least a portion of the second chamfered surface and a printed layer printed on at least a portion of the rear surface. At least a portion of the coating layer may be exposed to an outside.