Drive Backplane Voltage Detection for Uniform Micro LED Backlights
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Solution Overview
Problem
The issue of voltage drop in the common voltage line of Micro LED backlights affects the uniformity of light emission and reduces the service life of the display, leading to poor display performance.
Innovation Solution
A drive backplane design with signal detection lines connected to pads of light emitting units, allowing for voltage drop detection and adjustment, improving display quality and extending the service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If common voltage lines are used in Micro LED backlights, then power supply is provided to light emitting units, but voltage drop occurs affecting light emission uniformity
Solution Approach 1:
The patent segments the monitoring function by adding separate signal detection lines distinct from the common voltage lines. These detection lines are dedicated to monitoring voltage at specific light emitting units, allowing localized voltage drop detection without interfering with the power supply function of the common voltage lines.
Solution Approach 2:
The patent implements feedback by connecting signal detection lines to pads of light emitting units and routing them to detection circuits. The detection circuits monitor voltage levels and provide feedback signals that enable identification and adjustment of voltage drops, creating a closed-loop system for maintaining voltage stability.
2Illumination intensity
If signal detection lines are added to detect voltage drops, then display uniformity is improved, but device complexity increases
Solution Approach 1:
The signal detection lines are designed to serve multiple functions: they detect voltage levels, provide diagnostic information about voltage drops, and enable adjustment of driving parameters. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent uses the existing pad structures of light emitting units as intermediary connection points. The signal detection lines connect to these existing pads rather than requiring entirely new interface structures, thereby leveraging existing components to reduce the overall complexity increase.
Data Source
AI summary
Disclosed are a drive backplane, a preparation method therefor, and a display apparatus. The drive backplane includes a substrate, wherein the substrate includes a light emitting region and a bonding region, the light emitting region includes light emitting units arranged in an array, each light emitting unit includes a first signal line and a pad electrically connected with the first signal line; a first conductive layer, which is disposed on one side of the substrate and includes a first signal line and at least one signal detection line; and a second conductive layer, which is disposed on one side of the first conductive layer facing away from the substrate and includes: a pad; wherein the signal detection line is electrically connected with the pad of the light emitting unit.