Liquid Crystal Display Panel Alternating Pixel Capacitance
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Solution Overview
Problem
Liquid crystal display panels face issues with mesh lines or bright/dark lines due to differences in charging states of pixels caused by gate delays and polarity conversions during two dot horizontal inversion driving, leading to undercharge and uneven voltages.
Innovation Solution
The implementation of liquid crystal display panels with alternating rows of pixel units, each connected to scan and data lines, featuring storage capacitors with varying capacitance values to ensure holding voltages are approximately equal after a feed-through voltage drop, thereby addressing the issue of mesh lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two dot horizontal inversion driving is used to eliminate display flicker, then display flicker is circumvented, but mesh lines or bright/dark lines occur due to gate delay and polarity conversion causing undercharge
Solution Approach 1:
The patent applies local quality by differentiating the capacitance values of storage capacitors based on their position in the pixel array. Specifically, storage capacitors in even-numbered rows are designed with a first capacitance value, while those in odd-numbered rows have a second capacitance value. This localized differentiation compensates for the charging differences caused by gate delay and polarity conversion, ensuring uniform display quality across the entire screen while maintaining the 2H inversion driving mode.
2Manufacturing precision
If gate delay is compensated by turning on gate before data input, then high-resolution panel charging is improved, but large difference of charging state occurs due to polarity conversion
Solution Approach 1:
The patent changes the capacitance parameter of storage capacitors based on row position to compensate for charging state differences. By setting storage capacitors in even rows to a first capacitance value and those in odd rows to a second capacitance value, the system balances the charging states across different polarity groups, eliminating the harmful charging state differences that would otherwise manifest as display defects.
Data Source
AI summary
A liquid crystal display panel and liquid crystal display array substrate are disclosed. The liquid crystal display array substrate includes first scan lines, second scan lines, data lines, first columns of pixel units and second columns of the pixel units. Each of the first columns of the pixel units has a plurality of first pixel structures electrically connected to the first scan lines and the data lines respectively. Each of the second columns of the pixel units has a plurality of second pixel structures electrically connected to the second scan lines and the data lines respectively. Each of the first pixel structures has a first storage capacitor, and the first storage capacitor has a first capacitance value. Each of the second pixel structures has a second storage capacitor, and the second storage capacitor has a second capacitance value, wherein the second capacitance value is less than the first capacitance value.