Refractive Layer and Quantum Dot Structure for Pixel Isolation
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Solution Overview
Problem
The mixture of light from neighboring pixels in display apparatuses can adversely affect the quality of displayed images, leading to issues with color accuracy and image clarity.
Innovation Solution
A display apparatus design featuring a refractive layer with a concave upper surface, a planarization layer with a higher refractive index, and quantum dot layers that concentrate and filter light emitted from light-emitting elements, ensuring that light is directed appropriately and minimizing interference between pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light-emitting elements are arranged closely to increase display resolution, then image clarity is improved, but light from neighboring pixels mixes and color accuracy deteriorates
Solution Approach 1:
The patent introduces a reflective layer with a specific refractive index positioned between adjacent light-emitting elements. This reflective layer segments the light paths from neighboring pixels, reflecting light back to its intended color filter layer while preventing lateral mixing with adjacent pixels. The segmentation occurs at the interface between the reflective layer and the lower substrate, creating optical isolation zones for each pixel.
Solution Approach 2:
The reflective layer acts as an intermediary optical element between the light-emitting elements and the color filter layers. By positioning this layer with controlled refractive index properties, it mediates the light propagation path, ensuring that light from each pixel is directed to its corresponding color filter layer while blocking stray light from neighboring pixels that would otherwise cause color contamination.
2Object-affected harmful factors
If quantum dot layers are introduced to improve color purity, then color accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies quantum dot layers selectively in specific regions rather than uniformly across the entire display. The quantum dot layers are positioned in areas where color conversion is most needed, such as converting blue LED light to green or red wavelengths. This localized application maintains color purity benefits while reducing overall material usage and structural complexity compared to a full-coverage quantum dot implementation.
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 configuration enhances light efficiency and image display quality by preventing unwanted light mixing and improving color purity, resulting in clearer and more accurate images.
Implementation Method 1
an upper surface of the refractive layer has a shape to concentrate light emitted from the first light-emitting element
Implementation Method 2
The planarization layer may have a refractive index greater than a refractive index of the refractive layer
Implementation Method 3
a first quantum dot layer filling the first opening
Data Source
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AI summary
A display apparatus includes a first substrate, a second substrate, a first light-emitting element, a refractive layer, a color filter layer, and a first quantum dot layer. The first substrate and second substrate overlap each other. The first light-emitting element is arranged between the first substrate and the second substrate and includes a first emission area for emitting first light. The refractive layer is arranged between the first light-emitting element and the second substrate, includes a first structure for concentrating the first light, and includes a face positioned between the first substrate and the first structure. The first color filter layer is arranged between the first emission area and the second substrate. The first quantum dot layer overlaps the first emission area.