Display Device With Inclined Light Blocking for Color Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices, particularly organic light-emitting diode (OLED) displays, face challenges in achieving high light efficiency and preventing color mixing between adjacent pixel areas.
Innovation Solution
The display device incorporates a light-blocking layer with inclined surfaces, a reflecting pattern, a phase delay plate, and a wire grid polarizing plate to recycle and redirect light, while a color filter enhances pixel-specific light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light-blocking layer with inclined surfaces is introduced to prevent color mixing, then color separation improves, but device complexity increases
Solution Approach 1:
The light-blocking layer is segmented into multiple inclined surfaces (first inclined surface and second inclined surface) with different slopes, where each surface is responsible for blocking light in specific directions to prevent color mixing between adjacent pixels while maintaining overall structural functionality
Solution Approach 2:
The light-blocking layer transitions from a conventional planar structure to a three-dimensional structure with inclined surfaces, utilizing angular geometry to redirect and block light paths effectively, thereby achieving superior color separation without requiring additional horizontal space
2Use of energy by moving object
If light recycling structures are added to improve light efficiency, then energy utilization improves, but device complexity increases
Solution Approach 1:
The reflecting pattern converts light that would otherwise be wasted or cause color mixing in the non-light-emitting areas into useful light by reflecting it back toward the pixel areas, thereby transforming potential harmful stray light into beneficial illumination that enhances overall light efficiency
Solution Approach 2:
The light-blocking layer with inclined surfaces serves multiple functions simultaneously: it blocks light to prevent color mixing, redirects light through reflection, and works in conjunction with the reflecting pattern to recycle light, thereby achieving multiple objectives with a single integrated structure
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 improves light efficiency by recycling light within the device and prevents color mixing, resulting in enhanced display performance.
Implementation Method 1
a light-blocking layer disposed in the non-light emitting area on the light emitting layer, and in a cross-sectional view, the light-blocking layer including a first surface facing the substrate; a second surface opposite to the first surface and forming a first inclination angle with the first surface; and a third surface opposite to the first surface, contacting the second surface, and forming a second inclination angle with the first surface
Implementation Method 2
an insulating layer disposed on the light-blocking layer and including a groove in the non-light emitting area; and a reflecting pattern filling at least a portion of the groove
Implementation Method 3
a phase delay plate disposed on the insulating layer; and a wire grid polarizing plate disposed on the phase delay plate
Implementation Method 4
the phase delay plate may include an about λ/4 phase delay plate
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A display device includes a substrate including pixel areas and a non-light emitting area disposed between adjacent pixel areas, a driving circuit layer disposed on the substrate, a light emitting layer disposed on the driving circuit layer, a light-blocking layer disposed in the non-light emitting area on the light emitting layer and in a cross-sectional view, the light-blocking layer including a first surface facing the substrate, a second surface opposite to the first surface and forming a first inclination angle with the first surface, and a third surface opposite to the first surface, contacting the second surface, and forming a second inclination angle with the first surface, an insulating layer disposed on the light-blocking layer and including a groove in the non-light emitting area, and a reflecting pattern filling at least a portion of the groove.