Light-Emission Driving Substrate Layout for Uniform Display Brightness
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Solution Overview
Problem
Traditional light-emission driving substrates suffer from non-uniform brightness due to defects in the structural design, particularly in the arrangement of connection terminals for light-emitting elements, leading to increased voltage signal loss and poor light-emitting surface uniformity.
Innovation Solution
A light-emission driving substrate design with a light-emitting area and a non-light-emitting area, where the non-light-emitting area includes a binding area for the driving chip, featuring first and second signal lines and connection terminals, with the distance between first connection terminals and the binding area being smaller than that between second connection terminals, optimizing signal transmission and reducing voltage drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connection terminals are arranged symmetrically around the binding area, then the structure is simple and easy to manufacture, but the light emission uniformity deteriorates due to voltage drop differences
Solution Approach 1:
The patent applies asymmetry by arranging first connection terminals (anode connections) at different distances from the binding area compared to second connection terminals (cathode connections). Specifically, at least one first connection terminal is positioned closer to the binding area than any second connection terminal, creating an asymmetric layout that compensates for voltage drop differences and achieves uniform light emission across the display panel.
2Reliability
If second connection terminals are placed closer to the binding area, then voltage transmission is improved, but light emission uniformity worsens due to excessive current to light-emitting elements
Solution Approach 1:
The patent applies local quality by assigning different positional characteristics to different connection terminals based on their functional requirements. First connection terminals (anode) are positioned closer to the binding area to ensure adequate voltage supply, while second connection terminals (cathode) are positioned farther away to prevent excessive current. Each terminal's position is optimized for its specific role in the electrical circuit.
3Area of stationary object
If first connection terminals are placed farther from the binding area, then space for binding area is increased, but voltage drop increases causing non-uniform light emission
Solution Approach 1:
The patent resolves this contradiction through asymmetric positioning where first connection terminals are strategically placed at optimized distances from the binding area. This asymmetric arrangement ensures that voltage drop is compensated while still providing adequate space for the binding area, achieving both voltage stability and spatial efficiency.
Data Source
AI summary
A light-emission driving substrate includes: a substrate; a device layer disposed on the substrate, wherein the device layer comprises a plurality of first signal lines and second signal lines that are disposed in a light-emitting area, and includes a plurality of first connection terminals and second connection terminals that are disposed in a non-light-emitting area, each of the first connection terminals is electrically connected to an anode of the light-emitting element through the first signal line, and each of the second connection terminals is electrically connected to the cathode of a light-emitting element through the second signal line; and wherein a distance between at least one of the first connection terminals and the binding area is smaller than a distance between each of the second connection terminals and the binding area.