Array Substrate Gate Line Switching for 3D Display Image Sticking
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Solution Overview
Problem
Large-size liquid crystal display panels experience image sticking and inconsistent brightness between left and right eyes when displaying 3D images due to the limitations of existing pixel designs and gate driving methods.
Innovation Solution
The array substrate incorporates multiple sets of gate lines with switch units, including thin film transistors, that alternately apply scanning signals to first and second gate lines, allowing independent control of data voltage between main and sub pixel areas, thereby enhancing 3D image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If gate signal G1b and charging gate signal G2a of adjacent pixels are connected together to share gate signals, then the number of driving chips is reduced and costs are saved, but image sticking phenomenon occurs when displaying 3D images
Solution Approach 1:
The gate driving function is segmented into two independent paths: one for scanning signals and another for switch control signals. This segmentation allows independent control of gate lines G1a, G1b, G2a, and G2b, preventing the image sticking phenomenon while maintaining cost-effectiveness through shared signal paths where appropriate.
Solution Approach 2:
The patent introduces dynamic control through switch units (T1, T2, T3, T4) that can alternately connect different gate lines based on timing signals. This dynamic switching enables flexible signal distribution, allowing the system to avoid image sticking by properly sequencing the activation of left and right eye signals while still sharing driving resources.
2Reliability
If double frame reverse driving method is used to eliminate image sticking, then image sticking phenomenon is resolved, but brightness of left and right eyes becomes inconsistent
Solution Approach 1:
The patent implements periodic switching of gate line connections through the alternation of switch control signals. The switch units periodically connect different gate lines (G1a-G1b, G2a-G2b) in a controlled sequence, ensuring that both left and right eye signals receive appropriate voltage levels at the correct times, thereby maintaining brightness consistency while eliminating image sticking.
Solution Approach 2:
The patent employs a feedback mechanism where the switch control signals are generated based on the timing requirements of the 3D driving scheme. The controller monitors the display timing and adjusts the switch control signals to ensure proper voltage application to both left and right eye pixels, maintaining brightness consistency while preventing image sticking artifacts.
3Reliability
If pixel design with sub pixel area capacitor Cst is used to improve large viewing angle color shift, then color shift effect is improved, but additional circuit complexity is introduced in each pixel
Solution Approach 1:
The patent combines the capacitor Cst function with the existing pixel electrode structure in the sub pixel area. By integrating the capacitor function into the pixel design rather than adding separate components, the patent achieves color shift correction while minimizing additional circuit complexity. The capacitor is formed using the same electrode and insulating layer structures already present in the pixel.
Solution Approach 2:
The sub pixel area is designed to serve multiple functions: it acts as both a display pixel and houses the compensation capacitor Cst. This multi-functionality allows the same structural elements to perform both display and compensation functions, reducing overall pixel complexity while achieving color shift correction.
Data Source
AI summary
The present disclosure relates an array substrate and a liquid crystal panel. A plurality of sets of gate lines are arranged on the array substrate, each set of gate line at least includes a first gate line and a second gate line, each set of gate line is arranged corresponding to a switch unit, the switch unit is alternately applied the inputted scanning signal on the first gate line and the second gate line. Through the above-describe manner, the present disclosure is possible to resolve the problems of the image sticking and the inconsistent of the left and right eyes brightness when the large-size panel displaying the 3D image, and thus enhance the quality of 3D image.