Light Conversion Pattern Layout for Thin Color-Accurate Displays
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Solution Overview
Problem
Current display technologies face challenges in reducing manufacturing costs and panel thickness while maintaining image quality, particularly in the application of ultra-small light emitting elements and color reproducibility.
Innovation Solution
A display device design featuring a substrate with unit light emitting areas, insulation layers, and light conversion patterns that include wavelength conversion particles and scattering particles, along with a manufacturing method that self-aligns light emitting elements and forms contact electrodes, allowing for reduced process steps and thickness without compromising color reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a separate light conversion layer is added to improve color reproducibility, then image quality is improved, but panel thickness increases and manufacturing complexity increases
Solution Approach 1:
The patent combines the light conversion function with the color filter layer by incorporating wavelength conversion particles into the color filter structure. This merging eliminates the need for a separate light conversion layer, thereby maintaining color reproducibility while reducing panel thickness and manufacturing complexity.
Solution Approach 2:
The color filter layer is designed to perform multiple functions simultaneously: it acts as both a color filter and a light conversion layer by incorporating wavelength conversion particles. This multi-functionality allows the single layer to achieve both color purification and wavelength conversion, reducing the overall panel thickness.
2Manufacturing precision
If a separate light conversion layer is added to improve color reproducibility, then image quality is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The patent merges the light conversion layer and color filter layer into a single integrated structure. This reduces the number of manufacturing steps by eliminating the need to separately form, align, and cure a dedicated light conversion layer, thereby simplifying the manufacturing process while maintaining color reproducibility.
Solution Approach 2:
The integrated color filter layer performs both color filtering and light conversion functions, reducing manufacturing complexity by eliminating the need for separate processing steps for each function. This multi-functional approach streamlines the manufacturing process while achieving the desired image quality.
3Area of moving object
If ultra-small light emitting elements are used to reduce pixel size, then display resolution is improved, but manufacturing precision and alignment difficulty increase
Solution Approach 1:
The patent forms the color filter patterns and light emitting element patterns simultaneously or in a predetermined sequence using the same photomask. This preliminary alignment ensures that ultra-small light emitting elements are precisely positioned relative to the color filter structures, maintaining manufacturing precision even at reduced pixel sizes.
Solution Approach 2:
The patent divides the display panel into multiple unit light emitting areas, each containing a light emitting element and corresponding color filter structures. This segmentation allows for independent patterning and alignment control of each unit, facilitating precise positioning of ultra-small elements while maintaining overall manufacturing feasibility.
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 reduces manufacturing costs and panel thickness while maintaining image quality by eliminating the need for a separate light conversion layer, ensuring effective color reproducibility and efficient light emission.
Implementation Method 1
a light conversion layer to improve image quality, such as, color reproducibility of a display device. In some cases, a blue light source is used as a light source, and it is converted to any one of red, green, and white light through the light conversion layer.
Implementation Method 2
a first scattering pattern overlapping the third light emitting area in the thickness direction and including a scattering particle
Data Source
AI summary
A display device includes a first substrate including a plurality of unit light emitting areas; a first electrode and a second electrode in each of the unit light emitting areas of the first substrate; a first insulation layer exposing one region of each of the first electrode and the second electrode; a light emitting element on the first insulation layer and having a first end and a second end in a length direction; light conversion patterns adjacent to the light emitting element, covering a portion of an upper surface of the light emitting element, and exposing the first and second ends of the light emitting element; a first contact electrode on the first electrode and connecting the one region of the exposed first electrode and the first end of the light emitting element; and a second contact electrode on the second electrode.