Parallel-Wired Display Structure for High-Luminance Heat Control
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Solution Overview
Problem
Existing display structures using a single wire connection to light-emitting elements generate excessive heat, leading to damage in resin substrates with low heat resistance, particularly when high luminance is required.
Innovation Solution
A display structure with parallel connections of anode and cathode wires to light-emitting elements, distributing current evenly across multiple wires to reduce heat generation and prevent substrate damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single wire is used to electrically connect light-emitting elements to achieve simple structure, then device complexity is reduced, but heat generation increases causing substrate damage
Solution Approach 1:
The single wire connection is segmented into multiple wires (anode wires and cathode wires). Each light-emitting element is connected through multiple parallel wires, dividing the current flow path and reducing heat generation in each individual wire while maintaining electrical connection functionality.
2Illumination intensity
If large current is applied to each light-emitting element to achieve high luminance, then illumination intensity increases, but heat generation in wires increases causing substrate damage
Solution Approach 1:
The current path is segmented into multiple parallel wires. By distributing the total current across multiple anode wires and cathode wires, the current density in each wire is reduced, thereby reducing heat generation (I²R losses) while maintaining the same total luminance output from the light-emitting elements.
Solution Approach 2:
Multiple wires are combined in parallel to form a wire network that collectively carries the total current. The anode wires and cathode wires work together as an integrated current distribution system, merging their individual contributions to achieve the required total current while keeping individual wire temperatures low.
3Ease of manufacture
If a film-like substrate made of resin material is used to achieve flexibility and lightweight properties, then ease of manufacture is improved, but heat resistance decreases making the substrate vulnerable to thermal damage
Solution Approach 1:
The electrical connection structure is segmented into multiple thin wires that can be integrated into the flexible substrate without requiring high-temperature processing. This segmentation allows the use of low-temperature connection methods compatible with resin substrates, maintaining both flexibility and thermal stability.
Solution Approach 2:
The wire connection parameters are changed from single thick wire to multiple thin wires, which alters the thermal characteristics. The multiple thin wires have lower individual current carrying capacity but generate less heat per wire, making them compatible with low heat resistance resin substrates while still achieving the required total current flow for high luminance.
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
Enhances luminance while maintaining substrate reliability by evenly distributing current and reducing heat generation in resin substrates.
Implementation Method 1
The plurality of anode wires are electrically connected to the anode terminal, in parallel to one another, and the plurality of cathode wires are electrically connected to the cathode terminal, in parallel to one another
Implementation Method 2
a plurality of light-emitting elements provided on the substrate
Data Source
AI summary
The display structure includes a film-like substrate, a plurality of light-emitting elements, and a plurality of main wires. Each of the light-emitting elements includes an anode terminal and a cathode terminal. The plurality of main wires include a plurality of anode wires and a plurality of cathode wires. The plurality of anode wires are electrically connected to the anode terminal, in parallel to one another, and the plurality of cathode wires are electrically connected to the cathode terminal, in parallel to one another.