Micro LED Boundary Pitch Layout for Seamless Display Regions
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Solution Overview
Problem
Current micro LED display devices suffer from splicing lines due to chip shift and brightness differences between display regions, caused by multiple transfers over small areas, leading to visual defects.
Innovation Solution
The micro light-emitting display device incorporates micro light-emitting elements with varying pitches between display regions and employs light-emitting auxiliary structures with consistent pitches to redefine the effective light-emitting area, using reflective or absorbing layers with controlled openings to mitigate splicing lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple transfers are used to form display devices over large areas, then the display area can be expanded, but splicing lines appear due to chip shift and brightness differences between regions
Solution Approach 1:
The patent applies different pitch values to different regions of the display device. Specifically, the first pitch is used within display regions while the second pitch is used at boundaries between adjacent display regions. This local differentiation allows the boundary regions to be visually blended, reducing splicing line visibility while maintaining large display area through multiple transfers
Solution Approach 2:
The patent changes the pitch parameter spatially across the display device. By varying the pitch from the first value (within regions) to the second value (at boundaries), the invention creates a gradient effect that masks the boundaries between transferred regions, thereby reducing splicing line visibility while enabling large-area display construction
2Area of stationary object
If multiple transfers are used to create large area displays, then display size increases, but chip shift causes brightness differences between regions
Solution Approach 1:
The patent implements local quality by assigning different pitch characteristics to different spatial locations. The boundary regions with the second pitch serve to visually blend adjacent display regions, compensating for brightness differences caused by chip shift during multiple transfer processes, thereby improving overall brightness uniformity across the large display area
3Ease of manufacture
If consistent pitch is used across all display regions, then manufacturing is simplified, but splicing lines become visible at region boundaries
Solution Approach 1:
The patent resolves this contradiction by implementing local quality through spatially varying pitch values. While most regions use the first pitch for simplified manufacturing, the boundary regions use the second pitch to mask splicing lines. This localized differentiation maintains ease of manufacture for the majority of the display while specifically addressing splicing line visibility at critical boundary locations
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 solution effectively reduces the visibility of splicing lines by ensuring consistent light emission and brightness across display regions, enhancing display quality and efficiency.
Implementation Method 1
The light-emitting auxiliary structures are reflective layers or absorbing layers
Implementation Method 2
The light-emitting auxiliary structures are reflective layers or absorbing layers
Data Source
AI summary
A micro light-emitting display device having multiple display regions includes a substrate, multiple micro light-emitting elements, and multiple light-emitting auxiliary structures. The micro light-emitting elements are disposed on the substrate, and positions of the micro light-emitting elements define ranges of the display regions, the micro light-emitting elements have a same first pitch between each other in any one of the display regions, and the micro light-emitting elements have a second pitch between each other at a boundary across any two adjacent display regions. The first pitch is different from the second pitch. The light-emitting auxiliary structures are respectively disposed on the micro light-emitting elements. The light-emitting auxiliary structures are reflective layers or absorbing layers, and each of the light-emitting auxiliary structures has an opening. Areas of the openings of the light-emitting auxiliary structures gradually increase or decrease at the boundary across the any two adjacent display regions.