OLED Pixel Structure Resistive Structure Relieves Color Crosstalk
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Solution Overview
Problem
Conventional OLED display apparatuses experience color crosstalk when displaying pure colors due to voltage differences between adjacent sub-pixels, leading to reduced display quality.
Innovation Solution
A pixel structure is introduced with a substrate, anode layer, a continuous first auxiliary light-emitting layer, a light-emitting layer including distinct sub-pixel portions, and at least one resistive structure arranged perpendicular to the second light-emitting portion, ensuring the second sub-pixel is not displayed by increasing its turn-on voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional OLED display apparatus uses adjacent sub-pixels with different lighting colors to display pure colors, then the display can show different colors, but color crosstalk occurs between adjacent sub-pixels reducing display quality
Solution Approach 1:
The patent divides the auxiliary light-emitting layer into multiple independent auxiliary light-emitting portions, each corresponding to a specific sub-pixel. This segmentation prevents voltage differences from spreading between adjacent sub-pixels, thereby eliminating color crosstalk while maintaining the ability to display different colors.
Solution Approach 2:
Each auxiliary light-emitting portion is specifically designed to correspond to its associated sub-pixel, providing localized voltage compensation only where needed. This local quality approach ensures that voltage differences are compensated individually for each sub-pixel without affecting adjacent sub-pixels, thus preventing color crosstalk.
2Device complexity
If the auxiliary light-emitting layer is continuous to cover the anode layer, then the structure is simple, but voltage differences cause color crosstalk between adjacent sub-pixels
Solution Approach 1:
The continuous auxiliary light-emitting layer is segmented into multiple discrete auxiliary light-emitting portions. Each portion is independently positioned over specific sub-pixels, preventing voltage difference propagation while maintaining structural organization and simplicity.
Solution Approach 2:
The auxiliary light-emitting portions act as intermediaries between the anode layer and the light-emitting layer, providing localized voltage compensation. This intermediary structure prevents direct voltage interaction between adjacent sub-pixels while maintaining the overall layer 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
The solution effectively relieves color crosstalk by maintaining the second sub-pixel off during the display of the first sub-pixel, thereby enhancing the display quality of the OLED panel.
Implementation Method 1
at least one first resistive structure in a pathway between the first auxiliary light-emitting layer and the cathode layer
Data Source
AI summary
A pixel structure, a method for manufacturing the same and a display panel are provided. The pixel structure includes: a substrate, an anode layer, a first auxiliary light-emitting layer, a light-emitting layer, a cathode layer and at least one first resistive structure. The light-emitting layer at least includes a first light-emitting portion and a second light-emitting portion, where the first light-emitting portion corresponds to a first sub-pixel, the second light-emitting portion corresponds to a second sub-pixel and a turn-on voltage of the first sub-pixel is greater than that of the second sub-pixel. The at least one first resistive structure is arranged between the first auxiliary light-emitting layer and the cathode layer and arranged in a direction perpendicular to the second light-emitting portion, at least partially overlaps with the second light-emitting portion and does not overlap with the first light-emitting portion.