Dual-Substrate OLED Panel for High Brightness
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Solution Overview
Problem
Conventional organic electroluminescent display panels face limitations in brightness, particularly for large-sized displays and long-distance viewing due to the self-luminous structure's inherent limitations in luminous intensity, which restricts their application.
Innovation Solution
The organic electroluminescent display panel design incorporates multiple organic electroluminescent units on opposing substrates, with overlapping projections to enhance brightness, including a configuration where one unit emits light of the same color as another, and the use of a driving module to synchronize light emission from both units, along with a color film layer and reflective layer to optimize light utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the current is increased to enhance luminous intensity, then the brightness of the functional layer is improved, but the luminous intensity remains unchanged after reaching a certain value, limiting the maximum brightness
Solution Approach 1:
The patent combines multiple organic electroluminescent units (first unit on first substrate, second unit on second substrate) to emit light in the same pixel region. The light from both units is merged and exits through the same light exit surface, effectively combining their luminous intensities to achieve higher overall brightness than a single unit could provide.
Solution Approach 2:
The patent transitions from a single-substrate structure to a dual-substrate stacked structure. By adding the second substrate with its electroluminescent unit in the vertical dimension, the system achieves higher brightness without increasing current in a single unit, thus overcoming the brightness limitation while maintaining application versatility.
2Illumination intensity
If multiple organic electroluminescent units are added to increase brightness, then the maximum luminous intensity is improved, but the device structure becomes more complex
Solution Approach 1:
The patent divides the display panel into two separate substrates, each carrying its own organic electroluminescent unit. This segmentation allows each unit to be independently fabricated and optimized, while their combination achieves higher brightness. The segmentation also distributes the structural complexity across two manageable substrates rather than one complex substrate.
Solution Approach 2:
The dual-substrate structure serves multiple functions: each substrate with its electroluminescent unit provides light emission, the stacking arrangement increases brightness, and the modular design facilitates independent fabrication and assembly. This multi-functionality achieves high brightness while managing structural complexity through standardized reusable substrate designs.
3Illumination intensity
If a dual substrate structure is used to enhance brightness, then the display brightness is improved, but the fabrication process becomes more difficult
Solution Approach 1:
The patent fabricates the first and second organic electroluminescent units on separate substrates before assembly. This preliminary fabrication allows each substrate to be optimized and tested independently, simplifying the overall manufacturing process. The pre-fabricated substrates are then assembled with precise alignment to ensure the overlapping projections of the electroluminescent units, making the complex dual-substrate structure manufacturable through modular assembly rather than complex one-step fabrication.
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 significantly increases the maximum brightness of the display panel, facilitating larger display applications and improved visibility from a distance while maintaining display quality and simplifying the fabrication process.
Implementation Method 1
when current is applied to the anode 20 and the cathode 30, the functional layer 40 will emit light
Implementation Method 2
a reflective layer disposed on a side of the second organic electroluminescent units away from the first organic electroluminescent units
Data Source
AI summary
Disclosed is an organic electroluminescent display panel and a fabrication method thereof. The organic electroluminescent display panel includes: a first base substrate and a second base substrate, a plurality of first organic electroluminescent units disposed at intervals from each other on a side of the first base substrate facing the second base substrate; and a plurality of second organic electroluminescent units disposed at intervals from each other on a side of the second base substrate facing the first base substrate. The plurality of first organic electroluminescent units is spaced apart from the plurality of second organic electroluminescent units in a direction perpendicular to an extending plane of the first base substrate. An orthographic projection of each first organic electroluminescent unit on the second base substrate at least partially overlaps with a corresponding second organic electroluminescent unit.