Display Panel Hole Formation for Leakage Current Reduction
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Solution Overview
Problem
In super-resolution displays, the narrow distance between sub-pixels leads to leakage current between adjacent sub-pixels, resulting in reduced luminance and deteriorated display quality.
Innovation Solution
A method of manufacturing a display panel involves forming a hole in the boundary area between adjacent sub-pixels using a wire generator, which reduces the leakage current by removing a portion of the light emitting structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the distance between sub-pixels is narrowed to achieve super-resolution display, then the display resolution is improved, but leakage current occurs between adjacent sub-pixels
Solution Approach 1:
The patent divides the light emitting structure into separate regions by forming holes in the boundary areas between sub-pixels. This segmentation isolates the light emitting structures of adjacent sub-pixels, preventing leakage current while maintaining the narrow pitch required for super-resolution display.
Solution Approach 2:
The patent extracts or removes portions of the light emitting structure in the boundary areas between sub-pixels by forming holes. This removal eliminates the source of leakage current in the critical boundary regions while preserving the light emitting functionality in the active display areas.
2Object-generated harmful factors
If the light emitting structure is removed in boundary areas to reduce leakage current, then leakage current is reduced, but the structural integrity of the light emitting element may be compromised
Solution Approach 1:
The patent applies different structural configurations to different regions: the light emitting structure is removed in boundary areas to prevent leakage current, while it is preserved in the active display areas to maintain light emission. This local differentiation optimizes both leakage prevention and structural integrity where needed.
Solution Approach 2:
By segmenting the light emitting structure through selective hole formation, the patent creates isolated regions that prevent electrical interference while maintaining the necessary structural components in each sub-pixel's active area for functional integrity.
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 method effectively reduces the influence of leakage current, thereby enhancing the image quality displayed by the display panel.
Implementation Method 1
forming a hole in a boundary area between adjacent ones of the plurality of sub-pixels, wherein the hole is formed using a wire of a hole generator
Implementation Method 2
applying a high-potential voltage to a first end of the wire; and applying a low-potential voltage to a second end of the wire
Data Source
AI summary
A method of manufacturing a display panel includes forming, on a substrate, a pixel circuit layer including a sub-pixel circuit of each of a plurality of sub-pixels; forming a first electrode of a light emitting element on the pixel circuit layer, the first electrode of the light emitting element electrically connected to the sub-pixel circuit; forming a pixel defining layer on the first electrode of the light emitting element; and forming a light emitting structure of the light emitting element on the pixel defining layer. In addition, the method includes forming a hole at a boundary area between the plurality of sub-pixels. The hole may be formed using a wire of a hole generator. In addition, the method may include forming a second electrode of the light emitting element on the light emitting structure.