OLED Repair Structure Using Floating Patterns for Pixel Defect Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light emitting display devices suffer from pixel defects such as bright spots and dark spots due to manufacturing impurities, leading to image quality deterioration and potential panel discard, necessitating an effective repair method.
Innovation Solution
The implementation of a repair structure in organic light emitting display devices, where a floating pattern is formed to electrically disconnect or connect the electrodes of adjacent pixels, allowing for the sharing of driving circuits and compensating for defects by adjusting data voltages, thereby repairing circuit and light emitting defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a repair structure is implemented to repair pixel defects, then image quality is improved, but device complexity increases
Solution Approach 1:
The display panel is divided into multiple pixel regions, and the repair structure is implemented at the pixel level by creating separate first and second pixel regions with independent driving circuits. This segmentation allows defective pixels to be isolated and repaired independently without affecting the entire display panel, thus improving image quality while managing complexity through modular design.
Solution Approach 2:
A floating pattern is introduced as an intermediary element between the first and second pixel regions. This floating pattern serves as an electrical insulator that prevents direct electrical connection between the pixel regions, enabling independent driving of each region while maintaining physical proximity. The floating pattern acts as a mediator that facilitates the repair structure without requiring complex isolation mechanisms.
2Reliability
If floating pattern is formed to electrically disconnect electrodes, then circuit defects are repaired, but manufacturing precision requirements increase
Solution Approach 1:
The floating pattern is designed as a simple, easily manufacturable insulating structure that can be integrated during the standard pixel fabrication process. Rather than requiring complex precision alignment or post-processing steps, the floating pattern uses conventional insulating materials and deposition techniques that are already part of the manufacturing workflow, thus reducing the burden on manufacturing precision while achieving effective electrical disconnection.
3Adaptability or versatility
If connection pattern is formed to electrically connect electrodes, then driving circuit sharing is enabled, but risk of electrical interference increases
Solution Approach 1:
The connection pattern is implemented with localized electrical connection only at specific points between the first and second pixel regions, rather than complete electrical interconnection. This local connection approach enables driving circuit sharing while maintaining electrical isolation in other areas, preventing electrical interference from propagating between regions. The connection pattern provides just enough electrical coupling for signal transmission while avoiding excessive interconnection that would cause interference.
Data Source
AI summary
The present invention provides an organic light emitting display device that includes a display panel in which an organic light emitting diode and a driving circuit are disposed in each pixel area of a first pixel and a second pixel which are certain pixels among a plurality of pixels, a floating pattern insulated from at least one of a first electrode of the organic light emitting diode of the first pixel and a first electrode of the organic light emitting diode of the second pixel is formed in the display panel, or a connection pattern for electrically connecting the first electrode of the organic light emitting diode of the first pixel with the first electrode of the organic light emitting diode of the second pixel is formed.