Display Panel Electrode Separation to Reduce Afterimage Defects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display panels suffer from afterimage defects and have limited electrical reliability and lifespan due to issues in the connection of light emitting elements and circuits.
Innovation Solution
A display panel design that includes a transistor, a light emitting element with a first and second electrode separated by a separator, and a sensing electrode, with connection wiring and bridge patterns to improve electrical connectivity and reduce afterimage defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second electrode is directly connected to the transistor without a separator, then the electrical connectivity is simplified, but afterimage defects occur and electrical reliability deteriorates
Solution Approach 1:
A separator is introduced as an intermediary component between the second electrode and the transistor. The separator includes a first region and a second region with different dielectric constants, serving as a mediator that both isolates and manages electrical fields. This resolves the contradiction by preventing direct contact (improving reliability) while maintaining controlled electrical connectivity through the intermediary structure.
Solution Approach 2:
The separator is segmented into multiple regions with different dielectric constants - a first region with a first dielectric constant and a second region with a second dielectric constant. This segmentation allows different portions of the separator to perform different functions: one region provides electrical isolation while another region manages field distribution, thereby preventing afterimage defects without requiring complete structural complexity.
2Reliability
If a separator with uniform dielectric properties is used, then the manufacturing process is simplified, but afterimage defects cannot be effectively reduced
Solution Approach 1:
The separator exhibits local quality variations through its segmented structure with different dielectric constants in different regions. The first region and second region have distinct dielectric properties tailored to their specific functional requirements. This local differentiation effectively reduces afterimage defects by optimizing electrical field management in critical areas without requiring complete restructuring of the entire separator.
3Reliability
If the sensing electrode and second electrode are electrically connected, then the circuit complexity is reduced, but electrical interference increases and reliability decreases
Solution Approach 1:
The separator serves as an electrical intermediary that isolates the sensing electrode from the second electrode. By positioning the sensing electrode on the separator and ensuring electrical separation, the mediator prevents direct electrical contact that would cause interference, while still allowing the sensing electrode to function independently for touch detection, thereby improving electrical stability.
Data Source
AI summary
Provided is a display panel including a transistor, a light emitting element including a first electrode, an intermediate layer disposed on the first electrode, and a second electrode disposed on the intermediate layer, wherein the second electrode is electrically connected to the transistor, a pixel defining film disposed on the first electrode defining an emission opening above a portion of the first electrode and disposed on the first electrode, a separator disposed on the pixel defining film, and a sensing electrode disposed on the separator, wherein the sensing electrode and the second electrode are electrically separated by the separator.