OLED Display Panel Gate Layout for Uniform Brightness
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Solution Overview
Problem
Current OLED display panels face issues with display uniformity due to heavy load on signal lines, leading to significant voltage drops and non-uniform illumination.
Innovation Solution
The display panel design includes a patterned conductive structure for the gate of functional transistors, connected to gating lines through vias, with lower sheet resistance layers to reduce voltage drops and improve uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If active driving with pixel circuits and signal lines is used, then self-illumination and high brightness are achieved, but heavy load on signal lines causes voltage drops and non-uniform illumination
Solution Approach 1:
The patent transitions from planar signal line routing to three-dimensional vertical stacking by placing pixel circuits on one side of the substrate and gating lines on the other side. This spatial separation in the vertical dimension reduces the electrical load on horizontal signal lines, minimizing voltage drops and improving display uniformity while maintaining high brightness performance.
Solution Approach 2:
The patent divides the display structure into separate functional modules: pixel circuits on one substrate side and gating lines on the opposite side. This segmentation isolates the high-current pixel circuit paths from the signal distribution lines, reducing electromagnetic interference and voltage drops that cause non-uniform illumination.
2Productivity
If signal lines are heavily loaded to drive pixel circuits, then high definition and fast response are achieved, but voltage drops affect display uniformity
Solution Approach 1:
By stacking pixel circuits and gating lines on opposite sides of the substrate, the patent creates independent vertical pathways for high-speed signal transmission and voltage distribution. This three-dimensional arrangement allows fast response signals to reach pixel circuits without sharing horizontal pathways with other pixel circuits, preventing voltage drops and maintaining voltage uniformity across the display.
3Reliability
If gating lines are separated from pixel circuits by placing them on opposite sides of substrate, then signal transmission resistance is reduced, but device structure becomes more complex
Solution Approach 1:
The patent utilizes the vertical dimension to separate gating lines and pixel circuits on opposite sides of the substrate, reducing signal transmission resistance through shorter, more direct pathways. While this adds a vertical dimension to the structure, the substrate itself remains a simple planar component, and the separation is achieved through standard multi-layer stacking techniques rather than complex three-dimensional integration.
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
This design reduces signal transmission resistance and voltage drops, enhancing display uniformity and overall performance.
Implementation Method 1
The conductive structure is electrically connected to the gating line through a via
Data Source
AI summary
Provided are a display panel and a display apparatus. The display panel includes a substrate, gating lines and pixels. The gating lines extend in a first direction. Each pixel includes a pixel circuit including a functional transistor. The functional transistor includes a patterned conductive structure. A gate of the functional transistor is located in the conductive structure. The conductive structure is electrically connected to the gating line through a via.