OLED Display Substrate Grid Layout for Uniform Initial Signal Voltage
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Solution Overview
Problem
Current display technologies face challenges in maintaining uniformity and reducing voltage drops across initial signal lines in OLED display substrates, which can lead to uneven picture display and increased process complexity.
Innovation Solution
The implementation of a display substrate design with initial signal connection lines that are electrically connected through via holes, forming a grid structure to reduce voltage drops and improve display uniformity, while maintaining the integrity of control electrodes and shielding layers to enhance pixel arrangement and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If initial signal lines are extended in a first direction and arranged in a second direction to form a grid structure, then voltage drops are reduced and display uniformity is improved, but device complexity increases due to the additional grid structure
Solution Approach 1:
The patent transforms the conventional single-direction signal line arrangement into a two-dimensional grid structure by extending initial signal lines in a first direction and arranging them in a second direction. This dimensional change allows the signal lines to intersect and form multiple connection points, reducing voltage drops across the display substrate while maintaining manageable complexity through systematic routing.
2Reliability
If initial signal connection lines are added to connect initial signal lines through via holes, then voltage distribution is improved, but manufacturing complexity increases due to additional via holes and connection lines
Solution Approach 1:
The initial signal connection lines serve multiple functions: they electrically connect initial signal lines through via holes to improve voltage distribution, provide additional signal routing paths, and maintain structural integrity. By designing these connection lines to perform multiple roles, the patent reduces the need for separate components, thereby simplifying the overall manufacturing process despite the added connectivity.
3Reliability
If pixel column spaces are used to arrange initial signal connection lines, then space utilization is improved and voltage drops are reduced, but the area available for other components is reduced
Solution Approach 1:
The patent utilizes the pixel column spaces between adjacent pixel columns to route initial signal connection lines. By arranging these connection lines in the vertical dimension (between pixel columns) rather than consuming horizontal pixel area, the design improves voltage distribution while preserving the area available for light-emitting components and other pixel elements.
Data Source
AI summary
A display substrate and a preparation method therefor, and a display device are provided. The display substrate includes a substrate, a plurality of initial signal lines and K rows and L columns of sub-pixels are provided on the substrate, K and L are each a positive integer greater than 1; a plurality of pixel column spaces are included between L pixel columns, the pixel column space is located between two adjacent pixel columns; at least one of the pixel column spaces is provided with initial signal connection lines, at least one of the initial signal connection lines is electrically connected to the plurality of initial signal lines through a via hole, on a plane parallel to the display substrate, the plurality of initial signal lines extend in a first direction and are arranged in a second direction.