AMOLED Display Panel Blocker Structure for Current Leakage Control
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Solution Overview
Problem
There is a demand for high frame rate active-matrix organic light-emitting diode (AMOLED) display panels that can achieve 120 Hz driving while maintaining display quality, but existing technologies face challenges in effectively addressing issues related to current leakage and display performance.
Innovation Solution
The display panel incorporates a pixel circuit with a driving transistor and a threshold compensation transistor, featuring a conductive structure and a blocker design that overlaps orthographically with specific components to enhance electrical connections and reduce current leakage, along with a shielding portion to manage data lines, ensuring efficient data signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the frame rate is increased to achieve high frame rate operation, then display performance is improved, but current leakage increases
Solution Approach 1:
A blocker structure is introduced as an intermediary element between the power line and the pixel circuit. This blocker acts as a mediator to control and reduce current leakage while still allowing necessary power supply, thereby enabling high frame rate operation without excessive current loss.
Solution Approach 2:
The blocker structure is positioned at a specific location where it partially overlaps with the power line in the plan view. This localized intervention allows current reduction at critical points without affecting the overall power supply to the pixel circuit, achieving selective current management.
2Loss of energy
If the blocker structure is added to reduce current leakage, then energy loss is reduced, but device complexity increases
Solution Approach 1:
The blocker structure is integrated with existing pixel circuit components rather than being a completely separate element. By merging the blocker with the power line structure and other circuit elements, the design reduces overall complexity while still achieving current leakage reduction.
Solution Approach 2:
The blocker structure serves multiple functions: it reduces current leakage, maintains power supply to the pixel circuit, and can be integrated with existing circuit layouts. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
3Reliability
If the first conductive structure is positioned to overlap with the blocker, then electrical connection is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The blocker structure and first conductive structure are designed with predetermined overlapping positions that are established during the circuit layout phase. This preliminary positioning allows manufacturing processes to follow a clear guide, reducing the actual precision requirements during fabrication while still achieving reliable electrical connections.
Data Source
AI summary
Disclosed are a display panel and a display device. In the display panel, an orthographic projection of the blocker on the base substrate at least partially overlaps with an orthographic projection of the conductive connection portion on the base substrate; an orthographic projection of the first conductive structure on the base substrate at least partially overlaps with the orthographic projection of the blocker on the base substrate; an area of an orthographic projection of a portion of the blocker overlapping with the first conductive structure on the base substrate is larger than an area of an orthographic projection of a portion of the blocker overlapping with the conductive connection portion on the base substrate, and an orthographic projection of the shielding portion on the base substrate at least partially overlaps with the orthographic projection of the first conductive structure on the base substrate.