Light Shielding Layer Height for LED Display Color Mixing
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Solution Overview
Problem
LED display apparatuses face issues with mutual interference between light-emitting elements, leading to color mixing problems and difficulties in manufacturing due to inadequate light shielding and positioning.
Innovation Solution
A display apparatus with a light shielding layer disposed on the periphery of light-emitting elements, where the height of the shielding layer relative to the elements is between ½×H2 and 2×H2 micrometers, or with a distance of 0 to 5 micrometers, to prevent lateral light interference and facilitate manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light emitting elements are arranged in an array to achieve high resolution, then display resolution is improved, but mutual interference between light from adjacent elements occurs causing color mixing
Solution Approach 1:
The patent introduces independent shielding structures (light shielding layers and filling materials) for each light emitting element. These segmented shielding structures are disposed between adjacent light emitting elements to isolate their light paths, preventing lateral light interference while maintaining the high-resolution array configuration.
Solution Approach 2:
The patent applies different materials and structures at different locations: light shielding layers are positioned laterally between adjacent elements to block lateral light, while filling materials are positioned vertically to fill gaps. This localized application of different shielding approaches optimizes light isolation at each specific position without compromising overall display resolution.
2Object-affected harmful factors
If light shielding structures are added to prevent color mixing, then light interference is reduced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines multiple functions into integrated structures: the light shielding layers serve both as optical isolation barriers and as structural fillers. The filling materials simultaneously fill gaps between elements and provide additional light blocking. This merging of shielding and filling functions reduces the need for separate components, simplifying the overall device structure.
Solution Approach 2:
The shielding structures are designed to perform multiple functions: lateral light blocking, gap filling, mechanical support, and adhesion enhancement. By making the shielding structures multi-functional, the patent reduces the total number of components needed and simplifies manufacturing processes while effectively preventing color mixing.
3Object-affected harmful factors
If taller light shielding layers are used to block lateral light, then light shielding effectiveness is improved, but assembly difficulty and adhesion problems increase
Solution Approach 1:
The patent employs filling materials with adjustable properties that can adapt to varying gap heights between light emitting elements. These materials can be infused in liquid or paste form and then cured to match the specific gap dimensions, providing optimal fill height dynamically adjusted to each location rather than requiring fixed-height shielding structures for all elements.
Solution Approach 2:
The patent changes the physical state and properties of filling materials during the manufacturing process. Materials are applied in a fluid state to easily fill gaps, then cured or solidified to provide structural support and adhesion. This parameter change from liquid to solid state enables both complete gap filling and strong mechanical bonding without requiring precise pre-calculation of fill heights.
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 shields lateral light, preventing color mixing and ensuring proper assembly and adhesion, thereby improving the reliability and brightness of the display while maintaining suitable light emission.
Implementation Method 1
The light shielding layer is disposed on a periphery of the light emitting element... effectively shields lateral light, preventing color mixing
Data Source
AI summary
A display apparatus includes an array substrate, a light emitting element, and a light shielding layer. The light emitting element is disposed on the array substrate and includes a first upper surface. The light shielding layer is disposed on a periphery of the light emitting element and includes a second upper surface. A distance between the first upper surface and the second upper surface in a direction perpendicular to the array substrate is between 0 and 5 μm.