Micro-LED Display Panel Mesh Structure for Contrast Improvement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Micro-LED display panels face issues with external light reflection from exposed substrate areas between LED chips and pixels, leading to poor contrast and image quality, as well as seam-related quality deterioration between module units.
Innovation Solution
A mesh structure is implemented over the micro-LED display panel to cover exposed substrate areas between LED chips and pixels, using wavelength converting materials and translucent materials to reduce light reflection and cover seams, thereby enhancing contrast and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If exposed areas of substrate between LED chips and pixels are left uncovered, then device complexity is reduced, but external light reflection increases causing poor contrast characteristics
Solution Approach 1:
A mesh structure is introduced as an intermediary element between the LED chips and the external environment. The mesh includes opening portions that allow light emission from LEDs while including portions that cover exposed substrate areas to prevent external light reflection, thus mediating between light emission requirements and anti-reflection needs
Solution Approach 2:
The mesh structure implements local quality by having different functional regions: opening portions located at LED chip positions that allow light emission, and covering portions located at exposed substrate areas that prevent external light reflection. This localized differentiation addresses specific problems in specific areas without affecting the entire display surface uniformly
2Ease of manufacture
If seams between module units are present, then manufacturing is simplified, but display image quality deteriorates due to visible seams
Solution Approach 1:
The mesh structure serves as a mediator that spans across module boundaries. The mesh portions covering exposed substrate areas extend across seam regions, visually masking the seams between module units while allowing the modular manufacturing approach to be maintained
Solution Approach 2:
The mesh structure performs multiple functions simultaneously: it allows light emission from LED chips, prevents external light reflection from exposed substrates, and masks seams between module units. This multi-functionality addresses multiple quality issues with a single component
3Reliability
If electrode pads are partially exposed to electrically connect LED chips, then electrical connectivity is achieved, but external light reflection strongly increases
Solution Approach 1:
The mesh structure implements local quality by providing different characteristics in different locations: opening portions at LED chip positions for light emission, and covering portions at exposed electrode pad areas to prevent external light reflection while maintaining electrical connectivity through the pads
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 mesh structure effectively reduces external light reflection, improves contrast and black characteristics, and achieves seamless displays with improved image quality and wide viewing angles, while also minimizing color mura occurrences.
Implementation Method 1
a mesh including first openings, second openings, and third openings individually accommodating the first LED chips, the second LED chips, and the third LED chips
Implementation Method 2
chip spacing portions are formed in the mesh to cover exposed areas of the substrate between the first LED chips and the second LED chips
Data Source
AI summary
A micro-LED display panel is disclosed. The micro-LED display panel includes: a plurality of unit substrates, each of which is formed with a plurality of electrode pads; a plurality of pixels, each of which includes a first micro-LED chip, a second micro-LED chip, and a third micro-LED chip mounted corresponding to the electrode pads; and a mesh arranged over the plurality of unit substrates. The mesh has pixel spacing portions covering at least some exposed areas of the plurality of unit substrates between the pixels and a plurality of openings accommodating the corresponding pixels. The micro-LED display panel is constructed such that the reflection of external light by the exposed areas of the substrate between the pixels and the exposed areas of the electrode pads disposed on the unit substrates is reduced. This construction improves the contrast characteristics and black characteristics of a display and achieves seamlessness in the micro-LED display panel.