Planar Power Wiring Layout for Uniform Display Voltage
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Solution Overview
Problem
Existing display devices experience image quality deterioration due to uneven voltage distribution across the display surface, leading to variations in luminance and color, caused by the potential difference between high and low power supply voltages.
Innovation Solution
The display device incorporates a substrate with a first and second surface, featuring a power supply voltage feeder that outputs both high and low power supply voltages, connected by first and second wiring conductors with planar conductive portions covering the surface, which reduce voltage variations by providing connectors on both sides of the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If power supply voltage is applied to pixel units through conventional wiring, then pixel units receive power supply voltage, but voltage distribution becomes uneven across the display surface causing image quality deterioration
Solution Approach 1:
The patent introduces a planar conductive portion that extends across the display surface in a two-dimensional plane, transitioning from conventional point-to-point wiring to a distributed planar structure. This dimensional change enables uniform voltage distribution across the entire display surface by providing multiple parallel conduction paths, thereby resolving the voltage unevenness issue while maintaining image quality consistency.
Solution Approach 2:
The planar conductive portion is designed to create equipotential regions across the display surface by providing a large-area conductive layer that minimizes potential differences. This equipotential structure ensures that all pixel units receive consistent voltage levels, preventing the voltage distribution unevenness that would otherwise cause image quality deterioration.
2Ease of operation
If wiring conductors are extended across the substrate to connect power supply voltage feeder and pixel units, then voltage can be supplied to pixel units, but voltage variation occurs due to potential difference between high and low power supply voltages
Solution Approach 1:
The wiring structure is segmented into multiple functional portions: a first wiring conductor for high-power supply voltage, a second wiring conductor for low-power supply voltage, and a planar conductive portion for voltage distribution. This segmentation allows each portion to be optimized for its specific function, ensuring both ease of connection and voltage consistency across the display surface.
Solution Approach 2:
The planar conductive portion acts as an intermediary between the power supply voltage feeder and the pixel units. It receives power supply voltage from both high and low voltage wiring conductors and distributes it uniformly across the display surface, mediating the potential difference issue and ensuring consistent voltage delivery to all pixel units.
3Device complexity
If conventional wiring structure is used, then device structure is simple, but voltage distribution unevenness causes luminance and color variations
Solution Approach 1:
The patent merges the first wiring conductor, second wiring conductor, and planar conductive portion into an integrated wiring structure. This combined structure simultaneously handles both high and low power supply voltages while providing uniform voltage distribution across the display surface, achieving display quality uniformity without excessive structural complexity.
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 configuration effectively minimizes the potential difference between power supply voltages, thereby reducing luminance unevenness and improving image quality by ensuring consistent voltage distribution across the display surface.
Implementation Method 1
a first wiring conductor electrically connecting the power supply voltage feeder and the plurality of pixel units to apply the first power supply voltage to the plurality of pixel units and a second wiring conductor electrically connecting the power supply voltage feeder and the plurality of pixel units to apply the second power supply voltage to the plurality of pixel units
Data Source
AI summary
A display device includes a plate-like substrate having a first surface and a second surface, pixel units on the first surface, and a power supply voltage feeder on the second surface. The power supply voltage feeder outputs first and second power supply voltages applicable to the pixel units. The second power supply voltage is lower in potential than the first power supply voltage. The display device includes a first wiring conductor electrically connecting the power supply voltage feeder and the pixel units and a second wiring conductor electrically connecting the power supply voltage feeder and the pixel units. At least one of the first or second wiring conductor includes a planar conductive portion covering the first surface. The planar conductive portion includes connectors connected to the power supply voltage feeder on at least two sides of the substrate.