Mini-LED Light-Emitting Substrate Layout for Parasitic Capacitance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Mini-LED light-emitting modules used as backlight modules in liquid crystal display devices, there is a recurring issue where Mini-LEDs that are supposed to be turned off remain turned on in the division areas, affecting display contrast.
Innovation Solution
A light-emitting substrate design is introduced, featuring a base substrate with a light-emitting area and a bonding area, where the light-emitting unit with connected Mini-LEDs is positioned on the first surface, and at least part of the transmission lines are located on the second surface, ensuring insulation and reducing parasitic capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission lines are located on the first surface of the base substrate, then the connection between light-emitting elements and bonding area is simplified, but parasitic capacitance increases causing Mini-LEDs to remain turned on
Solution Approach 1:
The patent moves transmission lines from the first surface to the second surface of the base substrate, utilizing the third dimension (depth/thickness) to resolve the contradiction. This spatial reconfiguration reduces parasitic capacitance between transmission lines and connection lines, preventing false activation of Mini-LEDs while maintaining electrical connectivity through the substrate.
2Object-affected harmful factors
If transmission lines are moved to the second surface of the base substrate, then parasitic capacitance is reduced and display contrast is improved, but the transmission line routing becomes more complex
Solution Approach 1:
The transmission line routing is segmented into multiple sections: some portions remain on the first surface, while other portions extend to and are routed on the second surface. This segmentation allows the design to reduce parasitic capacitance in critical areas while maintaining simpler routing where possible, balancing performance improvement with manufacturing complexity.
Data Source
AI summary
The present disclosure provides a light-emitting substrate, a backlight source, and a display device. The light-emitting substrate includes: a base substrate having a first surface and a second surface which are opposite, and including a light-emitting area and a bonding area located on a side of the light-emitting area; a light-emitting unit disposed on the first surface of the base substrate and located in the light-emitting area, and including a plurality of light-emitting elements which are connected together; and transmission lines disposed on the base substrate; where at least a part of at least one transmission line is located on the second surface of the base substrate, and two ends of the light-emitting unit are respectively connected to the bonding area through different transmission lines.