Variable Width Power Supply Lines for Display RGB Crosstalk Reduction
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Solution Overview
Problem
Flat panel displays experience image quality reduction due to the arrangement of wires, specifically suffering from RGB crosstalk issues caused by high resistance values in power supply lines.
Innovation Solution
The display apparatus optimizes power supply line design by varying the width of extension units to reduce resistance, with wider first extension units and narrower second extension units, which decreases IR drop and crosstalk, ensuring uniform image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the power supply line width is increased to reduce resistance, then the RGB crosstalk is reduced, but the device area increases
Solution Approach 1:
The power supply line is divided into different sections with different widths: the first extension unit has a first width while the second extension unit has a second width that is narrower than the first width. This local differentiation allows the line to have low resistance where needed (first extension unit) while minimizing overall area consumption (second extension unit).
Solution Approach 2:
The power supply line extension is segmented into multiple units (first extension unit and second extension unit) with different width characteristics. This segmentation enables optimized resistance management in different regions, reducing overall crosstalk while controlling the total area occupied by the power supply network.
2Reliability
If the power supply line width is increased to reduce resistance, then the voltage drop is reduced, but the manufacturing complexity increases
Solution Approach 1:
Different sections of the power supply line have different widths tailored to their specific functional requirements. The first extension unit uses a wider width to minimize voltage drop in critical regions, while the second extension unit uses a narrower width in less critical regions, optimizing both electrical performance and manufacturing feasibility.
Solution Approach 2:
The power supply line width varies dynamically across different sections rather than being uniform throughout. This dynamic width adjustment allows the design to adapt to local electrical requirements, maintaining voltage stability where needed while simplifying manufacturing in other areas.
3Manufacturing precision
If the power supply line width is optimized to reduce resistance, then the image uniformity is improved, but the design complexity increases
Solution Approach 1:
The power supply line design incorporates local quality variations where the first extension unit has a specific width optimized for image uniformity in its region, while the second extension unit has a different width optimized for its own region. This localized optimization achieves overall image uniformity without requiring complex global redesign.
Solution Approach 2:
By segmenting the power supply line into multiple units with different width characteristics, the design achieves precise control over voltage distribution across the display, improving image uniformity through manageable, modular sections rather than a single complex continuous structure.
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 design effectively reduces RGB crosstalk and voltage drop, resulting in improved image uniformity and reduced power consumption by optimizing the width of power supply line extension units.
Implementation Method 1
a first extension unit 13 extending from the first body unit 11 in a second direction perpendicular to the first direction. The two first extension units 13 may each have a first width W1... As the first width W1 of each first extension unit 13 increases, a resistance (R) value of the first power supply line 10 may decrease
Data Source
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AI summary
A display apparatus includes a substrate. A display unit is disposed on the substrate and includes a display region and a non-display region. At least one light-emitting device is disposed in the display region. First and second power supply lines, configured to supply driving power to the at least one light-emitting device, and a pad unit, are disposed in the non-display region. The first power supply line includes a first fan-out wire portion electrically connected to the pad unit, and a first extension portion electrically connected to the first fan-out wire portion. The second power supply line includes a second fan-out wire portion electrically connected to the pad unit, and a second extension portion electrically connected to the second fan-out wire portion. The first extension portion has a width W1 and the second extension portion has a width W2. The width W1 is greater than the width W2.