Color Conversion Layout for High-Resolution Light-Recycling Displays
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Solution Overview
Problem
The limitation of ink ejection processes in display devices restricts the reduction of ink ejection area width, thereby limiting the resolution of display devices.
Innovation Solution
Incorporating a color conversion layer with light recycling components in the non-emission areas of the display device, which includes first and second margin areas, allowing light to be recycled and reintroduced into emission areas, thereby reducing the width of emission areas and enhancing light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the ink ejection process is used to apply color conversion material, then the manufacturing process is simple and easy to implement, but the width of ink ejection areas cannot be reduced below a certain limit due to device margin, thereby limiting the resolution of the display device
Solution Approach 1:
The non-emission area is segmented into margin areas that are selectively filled with color conversion material. This segmentation allows the color conversion layers to extend into the non-emission area, effectively reducing the width of emission areas and improving resolution without compromising the simplicity of the ink ejection manufacturing process.
2Manufacturing precision
If the width of emission areas is reduced to improve resolution, then the resolution of the display device improves, but the light emission efficiency decreases due to insufficient light output from smaller emission areas
Solution Approach 1:
The emission areas and non-emission area are merged by extending color conversion layers into the margin areas of the non-emission area. This merging captures stray light that would otherwise be lost and redirects it into the emission areas, maintaining light emission efficiency even as emission area width is reduced for higher resolution.
Solution Approach 2:
Color conversion layers act as intermediaries between the emission areas and non-emission area. These layers capture stray light from the non-emission area (including margin areas) and convert/recycle it into the emission areas, serving as a mediator that transfers light energy from non-productive regions to productive regions.
3Manufacturing precision
If the emission areas are made narrower to achieve higher resolution, then more emission areas can be arranged in the same space, but the overall brightness of the display device decreases due to reduced light output from each emission area
Solution Approach 1:
The color conversion layers provide continuous light recycling action by constantly capturing stray light from the non-emission area and redirecting it into the emission areas. This continuous light recycling process compensates for the reduced light output from narrower emission areas, maintaining overall display brightness while achieving higher resolution.
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 approach enhances the resolution and brightness of the display device by recycling light in margin areas, improving light emission efficiency and reducing the width of emission areas beyond the limitations of the ink ejection process.
Implementation Method 1
a color conversion layer, which converts a wavelength range of light emitted from some of the light-emitting elements into light of a different wavelength band
Implementation Method 2
light recycling components, which are disposed in parts of the non-emission area
Data Source
AI summary
A display device includes a first substrate, and a second substrate facing the first substrate. The first substrate includes a first supporting substrate, which includes emission areas arranged in parallel and a non-emission area between the emission areas, an element layer, which is disposed on the first supporting substrate and includes light-emitting elements disposed in the emission areas, an encapsulation layer, which is disposed on the element layer, and a color conversion layer, which is disposed on the encapsulation layer and converts a wavelength range of light emitted from some of the light-emitting elements. The color conversion layer includes light recycling components, which are disposed in parts of the non-emission area.