Liquid Crystal Panel GOA Signal Buffer Uniformity
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Solution Overview
Problem
Liquid crystal panels experience signal distortion due to transmission delays along data lines, resulting in non-uniform image or video display, as signals closer to the data driving chip are transmitted faster than those farther away.
Innovation Solution
The liquid crystal panel incorporates a Gate On Array (GOA) circuit with signal buffers of increasing dimensions or numbers along the direction from the data driving chip, reducing signal distortion by ensuring uniform signal transmission across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data signals are transmitted on data lines closer to the data driving chip, then transmission delay is smaller, but transmission delay is greater for data lines farther away, resulting in non-uniform display
Solution Approach 1:
The patent applies local quality by making different parts of the GOA circuit have different buffer capacities. Specifically, the buffer capacity of drive circuits is adjusted according to their distance from the data driving chip - circuits farther away have larger buffer capacities to compensate for greater transmission delays. This non-uniform local adjustment ensures that all gate lines receive signals with uniform timing characteristics despite varying transmission distances.
2Manufacturing precision
If uniform transmission delay is achieved across all data lines, then display uniformity is improved, but additional circuit complexity is required to compensate for transmission delays
Solution Approach 1:
The patent changes the parameter of buffer capacity in the GOA circuit to compensate for transmission delays. By adjusting the buffer capacity parameter of different drive circuits based on their position, the system achieves uniform signal transmission without requiring complex additional compensation circuits. This parameter adjustment approach simplifies the overall circuit design while maintaining display uniformity.
Data Source
AI summary
A liquid crystal panel and a liquid crystal device (LCD) are provided. The liquid crystal panel includes a first side, a second side opposite to the first side, and a third side. The liquid crystal panel further includes at least one gate on array (GOA) circuit. The GOA circuit includes a plurality of GOA units, and each of the GOA units includes a signal buffer configured to buffer received gate driving signals and to provide the buffered gate driving signals to the corresponding gate lines. Dimensions of the signal buffer of each of the GOA units are in an increasing order in a direction from the first side toward the second side, or numbers of the signal buffers of each of the GOA units are in an increasing order in the direction from the first side toward the second side.