TFT Drive Substrate for Seamless Mini LED Backlight Modules
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Solution Overview
Problem
Mini LED displays for large-screen applications face high production costs due to the use of printed circuit boards, leading to non-uniform backlight and fragmented display screens with visible splicing gaps, affecting brightness uniformity and visual experience.
Innovation Solution
A light-emitting module with a drive substrate featuring thin film transistors and independently drivable cell structures on a single substrate, eliminating physical splicing gaps and enabling active addressable drive, which reduces production costs and enhances brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a printed circuit board (PCB) is used as the base for mini LED large-screen applications, then the structural support and electrical connection are provided, but the production cost increases and visible splicing gaps appear
Solution Approach 1:
The patent merges multiple cell structures onto a single integral substrate, eliminating the need for separate PCB assemblies and physical splicing. This integration approach combines the structural support and electrical connection functions into one unified base, thereby reducing production costs and eliminating visible splicing gaps while maintaining reliability.
2Area of stationary object
If multiple separate cell structures are spliced together to form large-screen displays, then the large-screen display area is achieved, but display dark areas and splicing boundaries appear affecting brightness uniformity
Solution Approach 1:
The patent combines multiple cell structures into a single integral substrate assembly, eliminating the physical splicing boundaries between separate modules. This merging approach ensures continuous light emission across the entire display area, achieving large-screen display area while maintaining uniform brightness without dark areas or visible splicing lines.
3Ease of operation
If cell structures are arranged in an array with independent drive capability, then the display flexibility and control precision are improved, but the device complexity increases
Solution Approach 1:
The patent implements a universal drive substrate that can control multiple cell structures through a standardized interface. The drive layer with thin film transistors provides multi-functional control capabilities, allowing independent addressing of each cell structure while using the same substrate and drive architecture, thereby achieving display flexibility and precision without proportionally increasing device complexity.
Data Source
AI summary
A light-emitting module and a display apparatus are provided. The light-emitting module includes a drive substrate including a substrate and a drive layer located at a side of the substrate, cell structures arranged in an array of m rows and n columns and located at a side of the drive layer facing away from the substrate, and drive chips. The drive layer includes thin film transistors, and the substrate is an integral structure. Both m and n are positive integers and m and n are not both 1. The cell structures each include light-emitting devices, and the cell structures are driven independently from each other. One of the cell structures corresponds to at least one of the drive chips.