Micro Pixel Package Voltage Routing to Reduce Display IR Drop
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Solution Overview
Problem
Existing display modules face challenges with high resistance in power lines, leading to significant current-resistance (IR) drops, which affect the performance and efficiency of inorganic light-emitting elements.
Innovation Solution
The display module incorporates micro pixel packages with internal connection lines that have higher electron mobility than traditional voltage lines, minimizing IR drops by distributing voltage efficiently between adjacent micro pixel packages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power lines are formed on a module substrate, then voltage can be transmitted between micro pixel packages, but high resistance causes significant IR drops
Solution Approach 1:
The patent segments the power transmission path by forming some power lines within the micro pixel packages themselves rather than relying solely on external module substrate traces. This divides the long external connection into shorter internal connections, reducing total resistance and IR drops.
Solution Approach 2:
The patent applies different quality standards to different parts of the power transmission system: high-current power lines are formed with thicker traces or lower resistance materials within the micro pixel packages where they are most needed, while signal lines use standard routing on the module substrate.
2Ease of operation
If power lines are formed on a module substrate, then voltage distribution can be achieved, but resistance affects performance and efficiency
Solution Approach 1:
By segmenting the power distribution architecture to include both external module substrate routing and internal micro pixel package routing, the system achieves better voltage distribution while improving energy efficiency through reduced resistive losses in the critical short-distance connections.
Solution Approach 2:
The micro pixel packages act as intermediaries that receive power from the module substrate and redistribute it internally, serving as local power hubs that reduce the burden on external power lines and minimize overall IR drops in the system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces IR drops, ensuring consistent voltage delivery to micro pixel controllers and inorganic light-emitting elements, thereby enhancing display performance and energy efficiency.
Implementation Method 1
an internal connection line disposed in the second substrate and configured to electrically connect a first voltage line of the plurality of voltage lines that is electrically connected to a first micro pixel package of the set of micro pixel packages that are adjacent to each other in the first direction and a second voltage line of the plurality of voltage lines that is electrically connected to a second micro pixel package
Implementation Method 2
a plurality of inorganic light-emitting elements provided on the second substrate
Data Source
AI summary
A display module is provided. The display module includes a plurality of pixels, a first substrate, a plurality of micro pixel packages provided on the first substrate, and a plurality of voltage lines electrically connected between a set of micro pixel packages of the plurality of micro pixel packages that are adjacent to each other in a first direction. Each of the plurality of micro pixel packages includes a second substrate, a plurality of inorganic light-emitting elements provided on the second substrate, and a micro pixel controller provided on the second substrate and configured to control the plurality of inorganic light-emitting elements.