Parallel Conductive Structure for OLED Signal Delay Reduction
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Solution Overview
Problem
Current OLED display panels face challenges in achieving high resolution and display uniformity due to signal delay issues caused by voltage drops in signal lines, which are exacerbated by the complexity of OLED circuit structures compared to LCDs, limiting the improvement of display quality.
Innovation Solution
The introduction of a first conductive structure connected in parallel with the functional signal lines to reduce resistance and signal delay, allowing for thinner signal lines without compromising display uniformity, thereby enhancing both resolution and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal line width is increased to reduce resistance and signal delay, then display uniformity improves, but resolution deteriorates due to increased pixel pitch
Solution Approach 1:
The signal line is segmented into multiple parallel signal lines, with each signal line having a smaller width individually but collectively providing the same or greater conductive capacity. This segmentation allows the display panel to maintain display uniformity through distributed signal paths while preserving resolution by not increasing the overall pixel pitch.
Solution Approach 2:
The invention transitions from a single-dimensional signal line (one wide line) to a multi-dimensional structure (multiple parallel lines arranged in a grid pattern). This dimensional change enables the signal to be distributed across multiple paths, reducing resistance and signal delay without requiring any single line to be excessively wide, thus maintaining resolution.
2Ease of manufacture
If OLED circuit structure complexity is reduced to improve manufacturing, then display quality deteriorates due to signal delay
Solution Approach 1:
The complex OLED circuit is segmented into multiple simpler parallel signal lines rather than using fewer complex lines. This segmentation simplifies the manufacturing process by using standard, well-established fabrication techniques for creating multiple thin lines, while the collective arrangement of these lines maintains the necessary electrical performance for high display quality.
Solution Approach 2:
The invention changes the electrical parameters of the signal transmission system by distributing the signal across multiple parallel paths. This parameter change (from single-line high-current to multi-line distributed-current) reduces the resistance and signal delay without requiring complex circuit architectures, thereby maintaining display quality while simplifying manufacturing.
3Manufacturing precision
If signal line width is kept thin to improve resolution, then signal delay increases causing display uniformity issues
Solution Approach 1:
Multiple thin signal lines are merged in parallel to create an equivalent conductive path with the same or greater total cross-sectional area as a single thick line. This merging approach maintains the thin profile of individual lines (preserving resolution) while achieving the low resistance and signal delay characteristics of thick lines (preserving display uniformity).
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 solution effectively reduces signal delay and improves display uniformity, allowing for higher resolution and better display quality without increasing signal line width, thus addressing the limitations of existing OLED technologies.
Implementation Method 1
The introduction of a first conductive structure connected in parallel with the functional signal lines to reduce resistance and signal delay
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3~4B
AI summary
A display panel and a display device are provided. The display panel includes: a substrate (200), a plurality of pixel units (101), a functional signal line (01), and a first conductive structure (02). The substrate (200) includes a display area (201) and a peripheral area (202) on at least one side of the display area (201), the plurality of pixel units (101) are in the display area (201), each pixel unit (101) includes a light-emitting unit (20) and a pixel circuit structure (10) for providing a driving current to the light-emitting unit (20), and the light-emitting unit (20) is an electroluminescent element. The functional signal line (01) is connected with the pixel circuit structure (10) of each pixel unit (101) and provides a common voltage signal for the pixel circuit structure (10). The first conductive structure (02) is connected in parallel with the functional signal line (01) and is located at a layer different from that of the functional signal line (01). The display panel can improve the display uniformity and the resolution, thereby improving the display quality of the display panel.