Array Substrate Data Line Reduction via Time-Sequential Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high number of data lines in liquid crystal displays (LCDs) leads to a higher cost due to the increased requirement for source driver ICs, which accounts for a significant portion of the overall cost, and results in a larger and thicker display due to the increased wiring and element arrangement complexity.
Innovation Solution
The array substrate design reduces the number of data lines by using a single data line to charge both odd and even-numbered columns of pixel electrodes through first and second switching devices, respectively, under controlled sequences, thereby reducing the number of source driver ICs and simplifying the circuit board layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate data line is provided for each column of pixel electrodes, then each pixel electrode can be independently controlled, but the number of data lines and source driver ICs increases significantly
Solution Approach 1:
The pixel electrodes are segmented into odd-numbered columns and even-numbered columns, which are controlled by different switching devices. This segmentation allows the use of fewer data lines while maintaining independent control capability for each pixel electrode through time-sequential switching.
Solution Approach 2:
The patent employs dynamic switching control where the state of switching devices changes over time. By sequentially activating first switching devices for odd columns and second switching devices for even columns, the system achieves flexible pixel control with reduced data line requirements.
2Device complexity
If the number of data lines is reduced, then the cost and thickness of the display decrease, but the control capability over pixel electrodes is compromised
Solution Approach 1:
The patent implements periodic switching actions where data lines alternately control odd-column pixel electrodes and even-column pixel electrodes in sequential time periods. This periodic control ensures that each pixel electrode receives proper control signals while using fewer data lines, maintaining control reliability.
Solution Approach 2:
Switching devices serve as intermediaries between the reduced number of data lines and the pixel electrodes. These switching devices receive control signals from data lines and gate lines, then selectively connect data lines to appropriate pixel electrodes, ensuring reliable control despite the reduced data line count.
3Manufacturing precision
If more source driver ICs are used to control more data lines, then better image quality is achieved, but the overall cost increases significantly
Solution Approach 1:
Each data line is designed to serve multiple functions by controlling both odd-column and even-column pixel electrodes at different time periods. This multi-functionality reduces the total number of data lines and source driver ICs needed, thereby reducing cost while maintaining image quality through proper sequential control.
Solution Approach 2:
The patent changes the temporal parameter of control by introducing time-sequential switching. Data lines control different column groups at different times, which allows reduction in the number of data lines while maintaining the ability to control all pixel electrodes with sufficient precision for good image quality.
Data Source
AI summary
An array substrate is provided comprising a base substrate; an array of pixel electrodes formed on the base substrate; a plurality of gate lines, each of which is formed corresponding to each row of pixel electrodes; a plurality of data lines, each of which is formed corresponding to each odd number column of pixel electrodes and the next adjacent even number column of pixel electrodes; a plurality of first switching devices, each of which is connected with each odd-number-column pixel electrode, and the data lines charging the corresponding odd-number-column pixel electrodes via the corresponding first switching devices under driving control in corresponding time sequence; a plurality of second switching devices, each of which is connected with each even-number-column pixel electrode, and the data lines charging the corresponding even-number-column pixel electrodes via the corresponding second switching devices under driving control in corresponding time sequence.