Quantum Dot Display Cover Panel Light Blocking and Reflective Layer Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display apparatuses face challenges in preventing color mixing between adjacent light emitting areas and enhancing light efficiency, particularly in organic light emitting display panels.
Innovation Solution
A display apparatus with a cover panel featuring a window layer, an optical filter layer with a partition layer, a light blocking layer, and a reflective layer, along with a color filter layer using quantum dots, which includes a matrix-shaped partition layer and a light blocking layer with a metal component to prevent color mixing and improve luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional organic light emitting display panel is used, then the display can be formed with red, green, and blue organic light emitting layers, but color mixing occurs between adjacent light emitting areas and light efficiency is reduced
Solution Approach 1:
The cover panel is segmented into multiple functional layers: a partition layer with partition lines that divide the display area into separate regions, a light blocking layer that blocks light in non-emitting areas, and a reflective layer that reflects light back to emitting areas. This segmentation prevents color mixing between adjacent light emitting areas while improving light efficiency.
Solution Approach 2:
The partition layer acts as an intermediary structure between adjacent light emitting areas. The partition lines extend from the rear surface to the front surface of the cover panel, creating physical barriers that prevent light from adjacent areas from mixing, while still allowing each emitting area to function independently.
2Reliability
If light blocking structures are added to prevent color mixing, then color purity improves, but device complexity increases
Solution Approach 1:
Multiple functions are merged into the cover panel structure itself. The partition layer, light blocking layer, and reflective layer are integrated into a single cover panel component rather than being separate elements. This combining approach prevents color mixing and improves light efficiency without proportionally increasing overall device complexity.
Solution Approach 2:
The cover panel serves multiple functions simultaneously: it protects the display panel, provides optical filtering through the partition layer, blocks light in non-emitting areas through the light blocking layer, and reflects light back to emitting areas through the reflective layer. This multi-functionality reduces the need for additional separate components.
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 effectively prevents color mixing between adjacent light emitting areas and enhances light efficiency by reflecting leaked light back to the corresponding emitting areas, resulting in improved reliability and performance of the display apparatus.
Implementation Method 1
a reflective layer disposed in the opening... enhances light efficiency by reflecting leaked light back to the corresponding emitting areas
Implementation Method 2
a light blocking layer disposed on the partition layer... prevents color mixing between adjacent light emitting areas
Implementation Method 3
a color filter layer disposed on the optical filter layer and including quantum dots
Data Source
AI summary
A display apparatus includes a display panel including a base layer in which an active area and a peripheral area adjacent to the active area are defined, and a plurality of pixels, and a cover panel including a window layer, an optical filter layer disposed on a rear surface of the window layer, and a color filter layer disposed on the optical filter layer and including quantum dots. The optical filter layer includes a partition layer in which an opening is defined and which includes an organic material, a light blocking layer disposed on the partition layer, and a reflective layer disposed in the opening. The light blocking layer includes a metal.