OLED Pixel Barrier Ruts for Leakage Current Isolation
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Solution Overview
Problem
OLED display devices face issues with leaking emitting light due to leakage current, which affects color accuracy and brightness, especially in low brightness areas, and existing solutions either reduce luminescent material efficiency or degrade display resolution.
Innovation Solution
Incorporating pixel barrier layers with penetrating ruts to disconnect the OLED organic material layer, preventing leakage current from flowing between adjacent pixels, while maintaining high luminescent material efficiency and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the efficiency of luminescent material is reduced to inhibit leaking emitting light, then the leaking emitting light is suppressed, but the power consumption increases and display quality degrades
Solution Approach 1:
The pixel barrier layer is segmented by forming penetrating ruts that divide the layer into isolated regions. This segmentation prevents leakage current from flowing continuously between adjacent pixels, thereby suppressing leaking emitting light without requiring reduction of luminescent material efficiency
Solution Approach 2:
The penetrating ruts act as intermediary isolation structures between adjacent pixels. By introducing these intermediate barriers, the patent prevents direct electrical contact between neighboring pixels, blocking leakage current paths while maintaining the performance of luminescent material
2Object-generated harmful factors
If the resolution of display device is reduced to inhibit leaking emitting light, then the leaking emitting light is suppressed, but the display quality and pixel density decrease
Solution Approach 1:
The pixel barrier layer is divided into isolated regions by penetrating ruts, creating discrete electrical zones for each pixel. This segmentation approach suppresses leaking emitting light through electrical isolation rather than by increasing pixel spacing, thereby preserving high display resolution and pixel density
3Ease of manufacture
If pixel barrier layers are formed without penetrating ruts, then the manufacturing process is simpler, but leakage current flows between adjacent pixels causing color mixing and black brightness increase
Solution Approach 1:
The pixel barrier layer is segmented by forming penetrating ruts that create isolated electrical regions. This segmentation effectively blocks leakage current paths between adjacent pixels, preventing color mixing and black brightness increase while maintaining manufacturing feasibility through standard patterning processes
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
Effectively inhibits leaking emitting light, reduces short circuit defects, and enhances the reliability and display quality of OLED devices without compromising luminescent material efficiency or resolution.
Implementation Method 1
Incorporating pixel barrier layers with penetrating ruts to disconnect the OLED organic material layer, preventing leakage current from flowing between adjacent pixels
Implementation Method 2
The principle of the OLED is that the illumination generates due to the carrier injection and recombination under the electric field driving of the semiconductor material and the organic semiconductor illuminating material
Data Source
AI summary
The present invention provides an OLED display device and a manufacture method thereof. The OLED display device comprises: a substrate (100); a plurality of first electrodes (200), spaced with one another and arranged in array on the substrate (100); pixel barrier layers (300), located on the substrate (100) and between every two adjacent first electrodes (200); each pixel barrier layer (300) comprises a rut (310) at center, and the rut (310) penetrates the pixel barrier layer (300); an OLED organic material layer (400), located on the first electrodes (200) and the pixel barrier layers (300); the OLED organic material layer (400) is disconnected at the ruts (310); a second electrode (500), located on the OLED organic material layer (400); the second electrode (500) is similarly disconnected at the ruts (310). The OLED display device can inhibit the leaking emitting light problem caused by the leakage current. The short circuit defects can be decreased, and the reliability of the OLED display device is promoted and the display quality of the OLED display device is improved.