Array Substrate Design for LCD Brightness Balance
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Solution Overview
Problem
Traditional liquid crystal display (LCD) panels suffer from bright and dark vertical lines due to signal distortion and charging imbalances caused by the data line share (DLS) arrangement, leading to degraded display quality.
Innovation Solution
The array substrate design connects sub-pixels in a specific manner with data lines and scan lines, forming column and row groups to ensure balanced charging, with each column group having alternating well-charged and poorly-charged sub-pixels when driven by a dot inversion method, using thin film transistors to facilitate these connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data line share arrangement is used to reduce data lines, then the number of data lines is reduced to half, but signal distortion and charging imbalance occur causing bright and dark vertical lines
Solution Approach 1:
The patent divides the display panel into multiple regions along the data line direction, with each region having dedicated data lines. This segmentation eliminates the need for data line sharing while maintaining reduced data line count through regional optimization, thereby preventing signal distortion and charging imbalance that cause bright and dark lines.
Solution Approach 2:
The patent implements different data line connection strategies for different regions of the display panel. Specifically, pixels in different regions are connected to different data lines based on their positional characteristics, ensuring that each region receives optimal signal quality and charging balance, thus eliminating the bright and dark vertical lines caused by uniform data line sharing.
2Quantity of substance
If scan lines are doubled to accommodate DLS arrangement, then data line sharing is enabled, but scan time per line is reduced leading to insufficient charging time
Solution Approach 1:
The patent segments the display panel into multiple regions with dedicated data lines for each region. This segmentation allows each pixel to be charged through its nearest data line within the same scan period, eliminating the need to double scan lines while maintaining adequate charging time for all pixels.
Solution Approach 2:
Instead of increasing scan lines to enable data line sharing, the patent inverts the approach by reducing data lines through regional segmentation. This inversion allows the system to achieve data line reduction without the harmful side effect of reduced scan time per line.
3Reliability
If data lines have resistance, then signal delay and waveform distortion occur, but increasing data line width to reduce resistance increases pixel area
Solution Approach 1:
The patent divides the display panel into multiple regions, each with its own dedicated data lines. This segmentation reduces the length of data lines required to span the entire panel, thereby reducing resistance and signal distortion without requiring wider data lines that would consume excessive pixel area.
Solution Approach 2:
The patent optimizes data line dimensions locally within each region rather than uniformly across the entire panel. This allows data lines to be sized appropriately for their specific region's requirements, minimizing resistance and signal distortion while preserving maximum pixel area.
Data Source
AI summary
The invention provides an array substrate including an array of sub-pixels, multiple data lines and multiple scan lines. The array of sub-pixels is divided into multiple column groups along the arrangement direction of the data lines and divided into multiple row groups along the arrangement direction of the scan lines. By the arrangement design of a connection manner of the sub-pixels with the data lines and scan lines in the array substrate, when is driven by a dot inversion method, each column of sub-pixels have intervally arranged well-charged sub-pixels and poorly-charged sub-pixels, so that in a liquid crystal panel including the array substrate, brightnesses of various areas are balanced on the whole and the drawback of the existence of bright and dark lines in the vertical direction is improved. A liquid crystal panel including the array substrate, and a corresponding liquid crystal display device also are provided.