Liquid Crystal Display Gate Sharing Structure for Aperture Ratio
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices face limitations in aperture ratio and transmittance due to the vertical electric field and the area required for thin film transistors (TFTs) in fringe field switching (FFS) mode, which also result in increased power consumption when displaying certain colors.
Innovation Solution
The LCD device employs a gate-sharing configuration where adjacent pixels share gate lines and data lines, reducing the area needed for TFTs and optimizing the number of data lines for high-gray signals based on selected gate lines to improve aperture ratio and transmittance without increasing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each pixel has its own dedicated gate line and data line, then the control precision of each pixel is improved, but the aperture ratio and transmittance are decreased due to the area occupied by TFTs
Solution Approach 1:
Adjacent pixels share common gate lines and data lines, merging the control resources. Specifically, pixels in the same row share gate lines, and pixels in the same column share data lines, thereby reducing the total number of lines needed and the area occupied by TFTs, which improves the aperture ratio
Solution Approach 2:
Gate lines and data lines serve multiple pixels simultaneously. Each gate line controls multiple pixels across different columns, and each data line provides data to multiple pixels across different rows, making these lines universal control and data transmission pathways
2Adaptability or versatility
If the number of data lines is increased to support all pixel configurations, then the display capability is improved, but the power consumption increases due to more lines requiring high-gray signals
Solution Approach 1:
The data line signal requirements are dynamic rather than static. Depending on which gate line is actively being scanned, different data lines require high-gray signals. The system adapts the signal requirements based on the current scanning state, reducing unnecessary power consumption
Solution Approach 2:
The signal characteristics of data lines change based on the gate line selection. When a particular gate line is active, the signal requirements for specific data lines change (high-gray vs. low-gray), allowing the system to optimize power consumption by adjusting signal parameters dynamically
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 enhances the aperture ratio and transmittance of the LCD device while maintaining comparable power consumption to traditional devices, with specific adjustments in data line usage for different gate lines to manage power effectively.
Implementation Method 1
The alignment direction of the liquid crystal molecules can be controlled by application of an electric field across the liquid crystal molecules. As the intensity or direction of the electric field is changed, the alignment of the liquid crystal molecules also changes.
Implementation Method 2
The LCD device is driven by using optical anisotropy and polarization properties of liquid crystal molecules.
Data Source
AI summary
The present invention provides a liquid crystal display device including gate lines extending on a substrate; data lines crossing the gate lines to define a plurality of pixels; a thin film transistor in each pixel; and a liquid crystal capacitor in each pixel region, an electrode of the liquid crystal capacitor is connected to the thin film transistor, wherein the thin film transistors of a (2a−1)th pixel and a (2a)th pixel in a (2b)th pixel column share a (2a)th gate line, and the thin film transistors in a (2a)th pixel and a (2a+1)th pixel in a (2b+1)th pixel column share a (2b+1)th gate line, and wherein each of a and b is a positive integer.