OLED Gate Line Layout for Uniform Display Driving
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Solution Overview
Problem
Current OLED display panels face issues with display uniformity due to heavy load on signal lines causing significant voltage drops, affecting the uniformity of the display.
Innovation Solution
The display panel design includes a patterned conductive structure for functional transistors, with the gate located in the conductive structure and electrically connected to the gating line through a via, and the sheet resistance of the layer where the gating line is lower than that of the conductive structure, reducing voltage drops and improving display uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If signal lines are used to connect pixel circuits in OLED display panels, then the display panel can be actively driven with high brightness and fast response, but heavy load on signal lines causes significant voltage drops affecting display uniformity
Solution Approach 1:
The patent transitions from a planar signal line layout to a three-dimensional architecture by placing signal lines on both the front and back sides of the substrate. This dimensional change allows signal distribution without excessive length on a single side, reducing voltage drops while maintaining active driving capability for high brightness display
2Extent of automation
If signal lines extend across the display panel to connect pixel circuits, then all pixels can be actively controlled, but the long signal lines cause significant voltage drops
Solution Approach 1:
The patent segments the signal distribution function by placing different signal lines on the front and back sides of the substrate. This segmentation divides the long signal paths into shorter segments, reducing the cumulative voltage drop while maintaining active driving control for all pixels
Solution Approach 2:
By utilizing both sides of the substrate for signal line placement, the patent creates a three-dimensional signal distribution architecture. This dimensional change reduces the effective signal line length required to reach all pixels, thereby reducing voltage drops while preserving active driving functionality
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. A sheet resistance of a layer where the gating line is located is lower than a sheet resistance of a layer where the conductive structure is located.