LED Display Trace Layout for Lower Stray Light and Better Transparency
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Solution Overview
Problem
Conventional capacitive touch panel devices using transparent conductive materials face high production costs and impedance issues, while metal meshes, although more conductive, suffer from reflection and stray light problems that degrade image quality and induce the Moiré Effect.
Innovation Solution
A light-emitting diode (LED) display module with a trace configuration layer featuring wires of varying distribution density, where wires closer to the light source have a sparser distribution and those farther away have a denser distribution, reducing stray light and improving transparency and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal meshes are used to replace transparent conductive materials, then conductivity is improved and surface resistance is reduced, but light reflection increases and image quality deteriorates
Solution Approach 1:
The patent applies local quality by varying the wire distribution density in different regions of the metal mesh. The wire density is adjusted according to the local requirements: sparser in regions where light reflection needs to be minimized, and denser in regions where conductivity is prioritized. This spatial variation in structure allows simultaneous optimization of both conductivity and light transmission properties.
Solution Approach 2:
The patent changes the structural parameters of the metal mesh by implementing non-uniform wire distribution density. The wire spacing, diameter, and pattern are modified as parameters to control both electrical conductivity and optical properties. By adjusting these parameters locally, the system achieves better overall performance than uniform structures.
2Ease of manufacture
If uniform wire distribution density is used in metal meshes, then manufacturing is simplified, but stray light problems increase and image quality deteriorates
Solution Approach 1:
The patent implements local quality by creating regions with different wire distribution densities within the metal mesh structure. Areas closer to the light source have sparser wire distribution to reduce reflection and stray light, while areas farther away have denser distribution for optimal conductivity. This localized differentiation improves image quality without significantly complicating the manufacturing process.
3Illumination intensity
If transparent conductive materials are used, then light transmittance is maintained, but production cost increases and impedance control becomes difficult
Solution Approach 1:
The patent replaces expensive transparent conductive materials with a cost-effective metal mesh structure. The metal mesh, made from conventional metals, provides equivalent or superior conductivity at lower material cost. The structure is designed to be durable and reusable, eliminating the need for expensive ITO or other transparent conductive oxide materials.
Solution Approach 2:
The patent employs composite material strategies by combining metal wires with transparent substrates and encapsulants to create a hybrid structure. This composite approach allows the metal mesh to provide conductivity while the transparent components maintain light transmittance, achieving performance comparable to pure transparent conductive materials at lower cost.
4Object-affected harmful factors
If wire distribution density is increased near the light source, then stray light is reduced, but conductivity in that region is compromised
Solution Approach 1:
The patent applies local quality by optimizing wire distribution density for different functional requirements in different regions. Near the light source, sparser wire distribution reduces stray light and reflection. In other regions, denser distribution ensures adequate conductivity. The overall system achieves balance through this spatially differentiated structure.
Solution Approach 2:
The patent implements a dynamic wire distribution pattern that adapts to the optical and electrical requirements at different locations. The wire density is not static but varies systematically across the structure, with transitions between sparse and dense regions optimized for overall performance. This dynamic design allows the system to simultaneously satisfy conflicting requirements in different 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
This design effectively reduces stray light by at least 30% compared to conventional metal meshes, enhancing the image quality and transparency of LED display devices.
Implementation Method 1
a light-emitting diode (LED) array 10
Implementation Method 2
the plurality of wires have a varying distribution density... effectively reduces stray light by at least 30%
Data Source
AI summary
A LED display structure and its display module thereof are provided. The LED display module includes a LED array, a substrate disposed below the LED array, and at least one trace configuration layer, which is disposed below the LED array and adjacent to the substrate. The at least one trace configuration layer includes a plurality of wires, and a distribution density of the wires varies according to a distance between the wires and the LED array. When the distance increases, the distribution density of the wires is denser. Otherwise, the distribution density is sparse when the wires are closer to the LED array. In view of the simulation experimental analyses of the present invention, it is believed that at least 30% of the stray light ratio can be reduced so as to enhance the LED display structure with better transparency and image quality.