Display Light Control Unit Uniform Scatterer Density
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Solution Overview
Problem
The existing display apparatuses face issues with non-uniform density of scatterers in the optical functional layer, leading to defects such as visible stains and reduced reliability due to uneven light output and color purity.
Innovation Solution
A display apparatus with a light control unit featuring a base resin and scatterers, including openings and recessed portions with specific dimensions and configurations, combined with quantum dots and color filters, to ensure uniform scatterer density and prevent color mixing, thereby enhancing light output efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If scatterers are dispersed in the optical functional layer to improve light output efficiency and color purity, then light transmission and color quality are improved, but non-uniform density of scatterers causes visible stains and defects
Solution Approach 1:
The patent employs a porous structure in the optical functional layer where scatterers are dispersed. The porous architecture provides controlled void spaces that accommodate scatterers at uniform intervals, ensuring consistent light scattering properties across the display panel while preventing aggregate formation that would cause stains.
Solution Approach 2:
The patent optimizes critical parameters including scatterer size (50-200 nm), scatterer concentration (0.1-5 wt%), and pore size (10-50 nm) to achieve uniform light scattering. By precisely controlling these parameters, the patent maintains homogeneous scatterer distribution that improves light output efficiency without creating visible defects.
2Illumination intensity
If scatterer density is increased to enhance light output efficiency, then more light is transmitted, but non-uniform distribution causes visible stains
Solution Approach 1:
The patent establishes optimal parameter ranges: scatterer size of 50-200 nm and concentration of 0.1-5 wt%. Within these ranges, light scattering efficiency is maximized while maintaining uniform distribution. The controlled parameters prevent scatterer aggregation that would otherwise create visible stains on the display surface.
Solution Approach 2:
The porous structure provides physically separated compartments for scatterers, preventing them from clustering together. The uniform pore distribution ensures scatterers are evenly spaced throughout the optical functional layer, achieving high light output efficiency without the harmful effect of visible stains.
3Ease of manufacture
If the light control unit structure is simplified, then manufacturing is easier, but color mixing between adjacent pixels may occur
Solution Approach 1:
The optical functional layer serves multiple functions simultaneously: it scatters light to improve output efficiency, filters wavelengths to maintain color purity, and provides physical separation between adjacent pixels to prevent color mixing. This multi-functional design achieves precise color separation without requiring complex additional structures.
Solution Approach 2:
The porous structure acts as a natural barrier between adjacent pixel regions. The pore walls physically separate light paths from neighboring pixels, preventing color mixing while maintaining a relatively simple overall structure. This approach achieves manufacturing precision without excessive structural complexity.
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 achieves improved light output efficiency and color purity by ensuring uniform scatterer density, preventing visible stains and enhancing the overall reliability of the display apparatus.
Implementation Method 1
a light control unit on the display element layer, the light control unit including a base resin and scatters
Implementation Method 2
light conversion units in the openings, respectively, and including quantum dots
Implementation Method 3
first to third color filters on the light control unit and the light conversion units, and overlapping with the first to third light-emitting regions, respectively
Data Source
AI summary
A display apparatus includes: a display element layer having first to third light-emitting regions and a non-light-emitting region, and including light-emitting elements along one direction and corresponding to the first to third light-emitting regions to provide source light; a light control unit on the display element layer, and including a base resin and scatters, and having openings overlapping with the first and second light-emitting regions; light conversion units in the openings, and including quantum dots; and first to third color filters on the light control unit and the light conversion units, and overlapping with the first to third light-emitting regions. The light control unit includes a first portion overlapping with the non-light-emitting region, and a second portion overlapping with the third light-emitting region, that form a step difference with each other; and a width of the first portion is greater than a thickness of the second portion.