Display Device Recessed Passivation Layer for Color Conversion Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with color conversion panels face challenges in achieving stable structural integration and enhanced light emission efficiency due to light loss and instability in the color conversion process.
Innovation Solution
The implementation of a display device design that includes a color conversion panel overlapping a display panel, with specific recess portions and layers such as a passivation layer, encapsulation layer, and filling layer, which enhance light emission efficiency and structural stability by optimizing the arrangement and thickness of these layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a color conversion panel is integrated with a display panel, then color conversion functionality is achieved, but structural stability and light emission efficiency deteriorate due to misalignment and light loss
Solution Approach 1:
The patent forms recess portions in the passivation layer and color conversion layers before integration, creating pre-aligned cavities that guide the positioning of the light-emitting element and ensure stable bonding between panels during assembly
Solution Approach 2:
The filling layer acts as an intermediary material disposed between the display panel and color conversion panel, filling the recess portions and mediating the bonding process to achieve stable structural integration while maintaining optical performance
2Adaptability or versatility
If a color conversion panel is integrated with a display panel, then color conversion functionality is achieved, but light emission efficiency deteriorates due to light loss
Solution Approach 1:
The patent forms recess portions in the passivation layer and color conversion layers before integration, creating pre-aligned cavities that guide the positioning of the light-emitting element and ensure stable bonding between panels during assembly
Solution Approach 2:
The filling layer acts as an intermediary material disposed between the display panel and color conversion panel, filling the recess portions and mediating the bonding process to achieve stable structural integration while maintaining optical performance
3Ease of manufacture
If the light-emitting element is positioned on a flat surface, then manufacturing is simple, but light emission efficiency and structural stability are reduced
Solution Approach 1:
The patent forms recess portions in the passivation layer and color conversion layers before integration, creating pre-aligned cavities that guide the positioning of the light-emitting element and ensure stable bonding between panels during assembly
Solution Approach 2:
The filling layer acts as an intermediary material disposed between the display panel and color conversion panel, filling the recess portions and mediating the bonding process to achieve stable structural integration while maintaining optical performance
Data Source
AI summary
A display device includes: a display panel; and a color conversion panel overlapping the display panel, where the display panel includes a transistor disposed on a first substrate; a light-emitting element electrically connected to the transistor; and a passivation layer disposed between the transistor and the light-emitting element and including a first recess portion. The light-emitting element is disposed on the first recess portion, the color conversion panel includes a first color conversion layer, a second color conversion layer and a transmission layer, which are disposed between a second substrate and the display panel, and at least one selected from the first color conversion layer, the second color conversion layer and the transmission layer overlaps the first recess portion.