Display Driving Module Multiplexing Circuit Crosstalk Reduction
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Solution Overview
Problem
Conventional display technologies face issues with crosstalk and poor display uniformity when operating at high frequencies, leading to serious chromatic aberration and insufficient data charging times, especially as the number of data lines increases.
Innovation Solution
A display driving module is introduced that includes a gate driving circuit and a data driving circuit with multiplexing sub-circuits, which electrically connect pixel circuits in odd-numbered and even-numbered rows to different data lines, and uses shift register units to apply synchronized gate driving signals, preventing crosstalk by controlling data voltage application through multiplexing control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the screen frequency is increased to achieve smoother visual effects, then the display performance is improved, but the data charging time becomes insufficient and crosstalk increases
Solution Approach 1:
The patent divides the pixel array into multiple blocks, with each block having its own data line. This segmentation allows independent control and charging of different regions, enabling sufficient charging time for each block even at high refresh rates, thereby resolving the contradiction between high screen frequency and insufficient data charging time.
Solution Approach 2:
The patent employs periodic scanning of pixel blocks with alternating charging cycles. By periodically selecting and charging specific blocks in a sequential manner, the system ensures each block receives adequate charging time while maintaining the overall high refresh rate of the display, thus resolving the time conflict.
2Quantity of substance
If the number of data lines is increased to control more pixel circuits, then the display resolution is improved, but the crosstalk between signal lines becomes more serious
Solution Approach 1:
The patent segments the display into multiple independent blocks, each with dedicated data lines. This segmentation reduces the total number of data lines needed while maintaining high resolution, as each block can be controlled independently. The reduced number of data lines decreases signal line density and minimizes crosstalk between adjacent lines.
Solution Approach 2:
The patent introduces block selection signals as intermediaries between the data driver and pixel circuits. These selection signals act as mediators that route data to specific blocks, allowing multiplexing of data lines. This intermediary mechanism enables fewer data lines to control more pixels without increasing crosstalk, as the selection signals isolate the active data line from others at any given time.
Data Source
AI summary
A display driving module includes a gate driving circuit, a plurality of data lines and a data driving circuit. The pixel circuits in odd-numbered rows and one column are electrically connected to a data line, and the pixel circuits in even-numbered rows and the one column are electrically connected to another data line. The data driving circuit includes a data driver and a multiplexing circuit, the multiplexing circuit includes a first multiplexing sub-circuit and a second multiplexing sub-circuit. The gate driving circuit includes a plurality of levels of shift register units, and an nth-level shift register unit is electrically connected to the pixel circuits in a (2n−1)th row and a (2n)th row, and configured to apply a same gate driving signal to the pixel circuits in the (2n−1)th row and the (2n)th row, where n is a positive integer.