Display Power Line Layout Using Metal Links to Cut Voltage Drop
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Solution Overview
Problem
Display devices face challenges in minimizing voltage drop and power consumption while maintaining image quality, particularly due to high resistance in transparent electrodes used for low-potential power lines, which affects brightness and efficiency.
Innovation Solution
The use of metallic materials for low-potential power lines that are connected to light-emitting elements via first and second assembling lines, reducing the need for transparent electrodes and minimizing resistance, allowing for independent voltage control across subpixels emitting different colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If transparent electrodes are used for low-potential power lines, then the display device can be manufactured with conventional processes, but the resistance is relatively high causing voltage drop and power consumption increase
Solution Approach 1:
The patent changes the material parameter of the low-potential power line from transparent electrode material to metallic material, fundamentally altering the electrical resistance characteristic while maintaining compatibility with existing manufacturing processes through sequential deposition techniques
Solution Approach 2:
The patent employs a composite structure where metallic material is deposited over or alongside transparent electrode materials, combining the low resistance of metals with the transparency and manufacturability of conventional transparent electrodes in a multi-layer configuration
2Ease of manufacture
If transparent electrodes are used for low-potential power lines, then the display device can be manufactured with conventional processes, but the voltage drop increases affecting image quality
Solution Approach 1:
The patent changes the material parameter of the low-potential power line from transparent electrode material to metallic material, fundamentally altering the electrical resistance characteristic while maintaining compatibility with existing manufacturing processes through sequential deposition techniques
Solution Approach 2:
This principle is not applicable to the patent's solution for voltage drop reduction
3Reliability
If metallic material is used for low-potential power lines, then the resistance is reduced minimizing voltage drop, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the low-potential power line formation with the existing transparent electrode formation process by depositing metallic material in the same manufacturing sequence, integrating multiple functions into a unified process flow rather than adding separate steps
Solution Approach 2:
The metallic material layer serves multiple functions: it acts as the low-potential power line conductor, provides additional shielding, and can be integrated with existing electrode patterns, allowing a single manufacturing step to achieve multiple objectives
Data Source
AI summary
A display device includes: a substrate including a display area having a plurality of subpixels, and a non-display area surrounding the display area and including a plurality of pad areas; a plurality of pads in the pad areas; a plurality of low-potential power link lines electrically connected to the pads in leftmost and rightmost areas among the pad areas; a plurality of first assembling lines and a plurality of second assembling lines respectively on the plurality of subpixels and electrically connected to the plurality of low-potential power link lines; and a plurality of light-emitting elements on the first assembling lines and the second assembling lines. Each of the plurality of low-potential power link lines includes: a first part connected to the plurality of first assembling lines or the plurality of second assembling lines; and a second part to transmit a low-potential power voltage to the first part.