TFT Array Substrate Driving Method for Display Color Mixing Reduction
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Solution Overview
Problem
Display devices experience a color mixing phenomenon due to excessive changes in the polarity of data signals applied to data lines, leading to degraded display effects and an inability to meet requirements for single-color image display and visual testing.
Innovation Solution
The method involves a TFT array substrate with a specific arrangement of gate and data lines, where data signals are applied in a manner that reduces the number of rising and falling edges within a frame to be less than the number of rows of pixels, using alternating patterns of data signal application to odd and even lines to minimize color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data signals are applied to all data lines in each frame, then the display coverage is complete, but the number of rising and falling edges increases causing color mixing
Solution Approach 1:
The patent divides data lines into two sets (first set and second set) and applies data signals alternately to each set in different time periods. This segmentation reduces the number of rising and falling edges applied to individual data lines, thereby eliminating color mixing while maintaining complete display coverage through sequential updating of all lines.
Solution Approach 2:
The patent implements periodic action by alternating the application of data signals between the first set and second set of data lines across different time periods within each frame. This periodic switching pattern ensures that no single data line experiences excessive polarity changes, preventing color mixing while still achieving complete display refresh.
2Manufacturing precision
If the number of rising and falling edges of data signals is reduced, then color mixing is eliminated, but the driving complexity increases
Solution Approach 1:
The driving method segments data lines into two distinct sets and applies signals alternately, which simplifies the control logic for managing rising and falling edges. Although the overall sequence is more complex, the segmented approach makes the signal generation and timing more systematic and manageable compared to traditional approaches that update all lines simultaneously.
3Productivity
If data signals are applied frequently to all data lines, then the display refresh is complete, but the power consumption increases
Solution Approach 1:
The patent applies data signals periodically to alternating sets of data lines rather than continuously to all lines. This periodic action reduces the total number of signal transitions and active driving periods, thereby lowering power consumption while still achieving complete display refresh within each frame through the alternating update pattern.
Solution Approach 2:
The patent performs preliminary action by pre-planning the alternating signal application pattern across the two sets of data lines within each frame. This organized approach ensures efficient power utilization by activating only the necessary data line set during each time period, avoiding unnecessary power consumption from simultaneous activation of all data lines.
Data Source
AI summary
A TFT array substrate includes gate lines, data lines insulatedly intersecting the gate lines, and pixels defined by the intersection of gate lines and data lines. The pixels comprise multiple pixel units arranged in an array, and each pixel unit comprises two first main pixels and two second main pixels. The first and second main pixels are arranged adjacently to each other in a row direction and in a column direction. Data signals are applied to odd-numbered data lines, and the voltage of even-numbered data lines from the plurality of data lines is equal to the reference potential; or the data signals are applied to the even-numbered data lines and the voltage of the odd-numbered data lines from the plurality of data lines is equal to the reference potential. The sum of rising and falling edges in one frame is less than the number of rows of the pixels.