OLED Backlight Panels With Millimeter-Scale Sub-Pixels
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Solution Overview
Problem
The increasing demand for high pixel density in OLED display panels, particularly as panel sizes grow, exacerbates manufacturing difficulties due to the sub-millimeter pixel size requirements.
Innovation Solution
The integration of a backlight module with a base substrate and organic light-emitting diodes (OLEDs) featuring millimeter-scale sub-pixels and a light conversion layer with fluorescent materials, allowing for improved manufacturing efficiency and reduced process complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sub-millimeter pixel size is used to achieve high pixel density, then pixel density is improved, but manufacturing difficulty increases exponentially
Solution Approach 1:
The display panel is divided into a display region and a non-display region, with the organic light-emitting diode extending into the non-display region. This segmentation allows the pixel structure to be simplified in the non-display region, reducing manufacturing complexity while maintaining high pixel density in the display region.
Solution Approach 2:
The organic light-emitting diode is extended from the display region into the non-display region along the vertical dimension. This dimensional extension provides additional space for electrical connections and structural support, reducing the complexity of achieving high pixel density without requiring all components to be confined within the display region boundaries.
2Reliability
If OLED technology is used for direct display, then display quality is improved, but manufacturing difficulty increases with panel size
Solution Approach 1:
The panel is segmented into display and non-display regions, allowing different structural configurations in each region. The display region maintains the high-quality OLED structure, while the non-display region uses a simplified structure for manufacturing ease, particularly for larger panels.
Solution Approach 2:
Different regions of the panel have different structural qualities. The display region features the complete OLED structure with light-emitting functional layers for high display quality, while the non-display region has a simplified structure optimized for manufacturing ease and electrical connections.
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 simplifies the manufacturing process and enhances production efficiency while maintaining high pixel density and display quality, including improved brightness and contrast.
Implementation Method 1
A luminescence of OLED is induced by an injection and a recombination of carriers, wherein a luminous intensity of the OLED is proportional to an injected current
Implementation Method 2
the light conversion layer includes a base layer and different types of fluorescent materials uniformly dispersed on the base layer
Data Source
AI summary
A display panel and a display device are provided. By applying organic light-emitting diodes to backlight technology, the light-emitting functional layer includes a plurality of light-emitting units. The light-emitting unit includes at least one millimeter-scale sub-pixel. Thus, a process flow and a mass production difficulty of organic light-emitting diodes in the prior art are reduced, and a manufacturing efficiency is improved.