Pixel Bank Openings for Higher Light Output in Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in optimizing the light output efficiency due to limitations in the design of pixel structures, which affect the supply and discharge of light from light emitting elements.
Innovation Solution
The display device incorporates a substrate with pixel columns comprising alternating pixel groups and banks that include specific openings, allowing for distinct emission areas and electrical disconnection of electrodes, along with color conversion layers and light block patterns to enhance light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pixel structures are designed with traditional single opening banks, then manufacturing simplicity is maintained, but light output efficiency is limited
Solution Approach 1:
The bank structure is segmented into multiple openings (first opening and second opening) instead of a single opening. This segmentation allows light from light emitting elements to be discharged through multiple pathways, increasing the overall light output efficiency while maintaining a relatively simple planar structure that can be integrated into existing pixel designs.
2Ease of manufacture
If electrodes are electrically connected across pixel groups, then manufacturing is simplified, but light emission control precision deteriorates
Solution Approach 1:
The electrical connection between adjacent pixel groups is extracted or removed at the bank opening region. The first and second electrodes of adjacent pixel groups are electrically disconnected in the first opening, allowing independent control of light emission for each pixel group while maintaining manufacturing simplicity through the standardized bank 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 design enhances light output efficiency by ensuring optimal light emission and color mixing, resulting in improved display performance.
Implementation Method 1
a color conversion layer located over the light emitting elements, and converting a first color of light emitted from the light emitting elements to a second color of light
Data Source
AI summary
A display device includes: a substrate; a plurality of pixel columns on the substrate, each of the plurality of pixel columns including a plurality of pixel groups each including a first pixel and a second pixel arranged along a first direction; and a bank enclosing a perimeter of each of the plurality of pixel groups, the bank including a first opening corresponding to each of the plurality of pixel groups, and a second opening located between two pixel groups adjacent to each other in the first direction among the plurality of pixel groups.