Light Exit Pattern Structure for High-Resolution Color-Pure Displays
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Solution Overview
Problem
Existing display devices struggle to achieve ultra-high resolution and prevent color mixing of light emitted from adjacent emission areas.
Innovation Solution
A display device incorporating inorganic light emitting elements with a large number of light emitting elements per unit area, featuring light exit structures with refractive indices greater than the substrate, and including color control structures and filters to manage light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of light emitting elements per unit area is increased to achieve ultra-high resolution, then display resolution is improved, but color mixing of light from adjacent emission areas occurs
Solution Approach 1:
A light exit structure is introduced as an intermediary component between adjacent light emitting elements. This structure includes a light exit pattern with a protruding second part that has a higher refractive index than the substrate, creating an optical barrier that guides light exit directions and prevents color mixing while maintaining ultra-high resolution display capabilities
Solution Approach 2:
The light exit structure implements local quality by creating localized refractive index variations at specific positions where light exits the substrate. The second part of the light exit pattern has a higher refractive index than the surrounding substrate, creating localized optical control zones that manage light propagation directionally for each emission area
2Use of energy by moving object
If a light exit structure with higher refractive index material is added, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The light exit structure is segmented into two distinct parts: a first part that is substantially coplanar with the substrate surface, and a second part that protrudes from the substrate surface. This segmentation allows the protruding second part to provide enhanced light emission efficiency through refractive index differences, while the first part maintains structural integration with the substrate, balancing performance improvement with structural simplicity
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 enables the display device to achieve ultra-high resolution and prevent color mixing, improving light emission efficiency and image quality.
Implementation Method 1
a refractive index of each of the light exit patterns is greater than a refractive index of the second substrate
Data Source
AI summary
A display device includes a first substrate including a display area, a non-display area, and a plurality of pixel circuit units in the display area and the non-display area, a plurality of light emitting elements on the first substrate in the display area, the plurality of light emitting elements being electrically connected to the pixel circuit units, a hole mask layer on the first substrate and including a plurality of holes corresponding to the light emitting elements, a second substrate on the hole mask layer and including a plurality of open holes corresponding to the plurality of holes, and a plurality of light exit patterns in the plurality of the open holes of the second substrate corresponding to the plurality of holes, wherein each of the light exit patterns includes a first part in one of the plurality of open holes.