Display Sub-Pixel Array With Dual Data Lines For Dot Inversion
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Solution Overview
Problem
Liquid crystal displays (LCDs) face irreversible damage due to prolonged operation under a single polarity, necessitating periodic polarity inversion to maintain normal liquid crystal molecule rotation and orientation, which increases power consumption in existing inversion methods like frame and row inversion.
Innovation Solution
An array substrate configuration with alternating gate and data lines drives sub-pixels in odd and even rows with different data lines, allowing for dot inversion in the column direction with a single inversion per frame scanning period, reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polarity inversion is implemented through frame inversion, row inversion, or column inversion, then liquid crystal molecules can maintain normal rotation and orientation, but power consumption increases
Solution Approach 1:
The invention segments the display panel into sub-pixel units with first and second sub-pixels arranged along the gate line direction. Each column of sub-pixel units is driven by two data lines, allowing independent polarity control of different sub-pixel groups. This segmentation enables selective polarity inversion in specific columns rather than requiring inversion across the entire display panel, thereby reducing overall power consumption while maintaining liquid crystal molecule health.
Solution Approach 2:
The invention applies different polarity inversion strategies to different columns of sub-pixel units. By controlling the polarity of data lines independently for each column, the system can perform local polarity inversion only where needed to prevent liquid crystal damage, rather than uniformly inverting polarity across the entire display. This localized approach reduces unnecessary power consumption.
2Reliability
If dot inversion is performed in column direction with multiple inversions per frame, then liquid crystal molecules maintain normal operation, but power consumption increases
Solution Approach 1:
The invention implements periodic polarity inversion by alternating the polarity of data lines in a cyclic manner across different columns. The driving circuit inverts polarity of even-numbered data lines in one frame and odd-numbered data lines in the next frame, creating a periodic inversion pattern. This periodic action ensures liquid crystal molecules maintain normal rotation while minimizing the frequency and scope of inversions, thereby reducing power consumption.
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 enables effective dot inversion in the column direction with reduced power consumption for the display device, ensuring long-term normal operation of liquid crystal molecules while minimizing energy expenditure.
Implementation Method 1
The main principle of LCD is to control the light transmission properties of liquid crystal through an electrical field so as to display images
Implementation Method 2
The magnitude of the electrical field generated between the pixel electrode and the common electrode determines the rotation degree of the liquid crystal molecules
Data Source
AI summary
An array substrate, a display device and a driving method thereof are disclosed. The array substrate includes gate lines, data lines intersecting with the gate lines, and sub-pixel units. Each sub-pixel unit includes a first sub-pixel and a second sub-pixel arranged with a same sequence; each row of sub-pixel units along a gate line direction are driven by two gate lines, and different rows of sub-pixel units are driven by different gate lines; each column of sub-pixel units along a data line direction are driven by two data lines; the first sub-pixel and the second sub-pixel in each sub-pixel unit are driven by different gate lines and different data lines, for the sub-pixels in each column, the sub-pixels in odd-numbered rows are driven by same one data line, and the sub-pixels in even-numbered rows are driven by same the other data line.