Display Panel Voltage Mesh Layout for Uniform Luminance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As display panel sizes increase, voltage drops in driving voltage lines cause non-uniform luminance and color coordinate deviations due to resistance, leading to crosstalk in digital driving methods.
Innovation Solution
Implementing a display device design with a greater number of common voltage lines compared to driving voltage lines, arranged in a mesh structure, to reduce voltage drops and crosstalk by ensuring a more uniform application of voltages across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of the display panel is increased, then the display area is enlarged, but voltage drop increases due to resistance of the driving voltage line
Solution Approach 1:
The patent divides the single driving voltage line into multiple segments (first driving voltage line and second driving voltage line) that extend in different directions. This segmentation reduces the effective length of each voltage transmission path, thereby reducing voltage drop across the large display panel area.
Solution Approach 2:
The patent transitions from a one-dimensional voltage transmission approach to a two-dimensional mesh structure by introducing driving voltage lines extending in both horizontal and vertical directions. This dimensional change allows voltage to be supplied from multiple directions, reducing the overall voltage drop across the panel.
2Loss of energy
If the number of driving voltage lines is increased, then voltage drop is reduced, but device complexity increases
Solution Approach 1:
The patent merges the functions of multiple voltage supply lines into a coordinated mesh structure where first and second driving voltage lines work together. This merging approach achieves reduced voltage drop while maintaining manageable complexity through functional integration rather than proliferation of independent lines.
Solution Approach 2:
The driving voltage lines in the mesh structure serve multiple functions: they provide voltage supply, reduce voltage drop, and minimize crosstalk. This multi-functionality allows the same structural elements to address multiple problems simultaneously, reducing the need for additional specialized components.
3Device complexity
If common voltage lines and data lines are in close proximity, then device complexity is reduced, but crosstalk increases due to coupling phenomenon
Solution Approach 1:
The patent uses multiple common voltage lines arranged in a mesh structure to create equipotential regions that shield data lines from voltage fluctuations. By maintaining consistent potential across multiple parallel lines, the coupling effect between common voltage lines and data lines is minimized, reducing crosstalk.
4Use of energy by moving object
If voltage drop occurs in driving voltage line, then power consumption is reduced, but luminance uniformity deteriorates
Solution Approach 1:
The patent implements local quality optimization by providing multiple driving voltage lines (first and second driving voltage lines) that supply voltage to different regions of the display panel. This ensures that each local region receives adequate voltage despite the overall panel size, maintaining luminance uniformity while managing power consumption.
Data Source
AI summary
A display device includes: a plurality of pixels disposed in a display area; a plurality of first voltage lines electrically connected to the plurality of pixels, the plurality of first voltage lines including a plurality of first common voltage lines extending in a first direction and a plurality of second common voltage lines extending in a second direction intersecting the first direction; and a plurality of second voltage lines electrically connected to the pixels, the plurality of second voltage lines including a plurality of first driving voltage lines extending in the first direction and a plurality of second driving voltage lines extending in the second direction. The number of the first common voltage lines are greater than the number of the first driving voltage lines.