Transparent OLED Substrate Aperture Ratio Optimization
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Solution Overview
Problem
Current display technologies face challenges in enhancing the aperture ratio of organic light-emitting diodes (OLEDs), which affects the brightness and efficiency of light passing through sub-pixels, due to limitations in the design of the electrode layers and light emitting structures.
Innovation Solution
A transparent OLED substrate is designed with a specific configuration of electrode layers, including a base substrate, pixel defining layer, light emitting layer, and second electrode layer, where the first electrode layer is formed with block or stripe electrodes that correspond to organic light emitting blocks, and the second electrode layer is made of transparent materials to optimize light transmittance and reduce diffraction effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a black matrix masking control circuit is provided to avoid abnormal display effects, then display reliability is improved, but the aperture ratio decreases
Solution Approach 1:
The invention extracts and removes the black matrix masking control circuit from the display structure. By eliminating this non-light-emitting component, the aperture ratio is increased while the display reliability is maintained through the improved electrode and light emitting layer configuration that provides sufficient control functionality without the masking circuit.
Solution Approach 2:
The invention merges the control circuit functionality directly into the electrode layer structure. The first electrode layer is designed to provide both control and light emission functions, combining previously separate functions into a unified structure that improves aperture ratio while maintaining display reliability.
2Illumination intensity
If the aperture ratio is increased to improve brightness, then light transmission efficiency is improved, but the control precision of individual sub-pixels may be compromised
Solution Approach 1:
The invention segments the first electrode layer into multiple independently controllable electrode regions corresponding to different sub-pixels. Each electrode region can be controlled independently, maintaining precise control over individual sub-pixels even as the overall aperture ratio increases. This segmentation allows each sub-pixel to be addressed separately while maximizing the light-emitting area.
Solution Approach 2:
The invention applies local quality by giving different regions of the first electrode layer different properties. Each electrode region has optimized characteristics for its specific sub-pixel function, allowing precise local control while maintaining high overall aperture ratio. The local electrode structures are tailored to provide appropriate control precision for each sub-pixel region.
3Area of stationary object
If block electrodes or stripe electrodes are used to increase effective light emitting area, then aperture ratio is improved, but the processing complexity increases
Solution Approach 1:
The invention employs dynamic electrode patterns where block electrodes and stripe electrodes are strategically positioned and sized to optimize light emission. The electrode configurations are designed to be adaptable to different display requirements, allowing the effective light emitting area to be maximized while maintaining manageable processing complexity through standardized design rules.
Solution Approach 2:
The invention optimizes parameters such as electrode width, spacing, and arrangement patterns to balance effective light emitting area with processing complexity. By carefully selecting and adjusting these geometric parameters, the design achieves high aperture ratio while keeping manufacturing processes within reasonable complexity limits through systematic parameter optimization.
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 configuration improves the aperture ratio by increasing the effective light emitting area, enhancing display brightness and reducing diffraction, while maintaining a high transmittance and simplifying the manufacturing process.
Implementation Method 1
a light emitting layer formed in the pixel defining layer and including organic light emitting blocks
Implementation Method 2
a second electrode layer formed over the light emitting layer... the second electrode layer is made of transparent materials to optimize light transmittance
Data Source
AI summary
The present disclosure provides a transparent OLED substrate, a display panel, and an OLED substrate. The transparent OLED substrate includes: a base substrate; a first electrode layer formed over the base substrate; a pixel defining layer formed over the first electrode layer, the pixel defining layer including a plurality of pixel defining holes penetrating the pixel defining layer to the first electrode layer, and an exposed area of the first electrode layer is equal to an area of the pixel defining hole; a light emitting layer formed over the pixel defining layer and including organic light emitting blocks; a second electrode layer formed over the light emitting layer; wherein each of the pixel defining holes corresponds to a plurality of the organic light emitting blocks.