Transparent LED Electrode Substrate With Darkened Metal Mesh
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Solution Overview
Problem
The existing transparent LED displays using indium tin oxide (ITO) face limitations due to high production costs, limited availability of indium, and non-uniform resistance, which affects the uniformity of light emission, and new materials like metal mesh offer a cost-effective and conductive alternative but require improvements in visibility and solder attachment force.
Innovation Solution
A transparent electrode substrate with a metal mesh pattern on a transparent substrate, where both the upper and lateral surfaces of the wire electrode unit have a darkening layer pattern, while the light emitting device mounting unit does not, and the metal mesh patterns for common and signal electrode wiring units have the same line width, line height, and pitch, maximizing coverage and reducing visibility and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ITO is used as transparent electrode material, then transparency and electrical conductivity are achieved, but production cost increases and indium availability is limited
Solution Approach 1:
The patent changes the material parameter from ITO to metal mesh, maintaining electrical conductivity while reducing cost and improving availability
Solution Approach 2:
The patent uses metal mesh as a cost-effective alternative to expensive ITO, making the transparent electrode more economical
2Reliability
If ITO is used as transparent electrode material, then electrical conductivity is achieved, but resistance value uniformity deteriorates
Solution Approach 1:
The patent changes from ITO to metal mesh material, which provides more uniform resistance distribution and consistent electrical conductivity across the transparent electrode surface
3Ease of manufacture
If metal mesh is used as transparent electrode material, then production cost decreases and conductivity improves, but visibility of the electrode increases
Solution Approach 1:
The patent applies a darkening layer pattern to the metal mesh transparent electrode, changing its optical appearance to reduce visibility while maintaining electrical conductivity and transparency functions
4Object-affected harmful factors
If darkening layer pattern is applied to metal mesh, then visibility decreases, but solder attachment force deteriorates
Solution Approach 1:
The patent applies the darkening layer pattern selectively to specific regions of the metal mesh while leaving soldering regions uncovered, creating local quality differences that simultaneously reduce visibility and maintain solder attachment force
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
This configuration decreases the visibility of the electrode substrate, maintains solder attachment force, and enhances the resistance characteristics of the transparent light emitting device display by maximizing the common electrode wiring area and reducing resistance.
Implementation Method 1
both an upper surface and a lateral surface of the metal mesh pattern of the wire electrode unit comprise a darkening layer pattern
Data Source
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AI summary
An electrode substrate for a transparent light emitting device display according to an exemplary embodiment of the present application comprises: a transparent substrate; a wire electrode unit, which is provided on the transparent substrate and comprises a metal mesh pattern; and at least one light emitting device mounting unit provided on the transparent substrate, in which both an upper surface and a lateral surface of the metal mesh pattern of the wire electrode unit comprise a darkening layer pattern, and both an upper surface and a lateral surface of the light emitting device mounting unit do not comprise a darkening layer pattern.