Array Substrate Voltage Dividing Resistors Viewing Angle
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Solution Overview
Problem
Liquid crystal display apparatuses with poor viewing angle characteristics suffer from decreased contrast, black and white reversal, and chromatic aberration when viewed from large angles due to non-uniform light emission across different directions.
Innovation Solution
The array substrate design includes pixel units with a first and second sub-pixel electrode, each driven by a TFT, where resistances between the source and data line, and drain and sub-pixel electrode are varied to create a voltage difference, allowing for uniform light emission by adjusting the deflection angles of liquid crystal molecules through voltage dividing resistors and unique connection shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid crystal molecules are arranged uniformly in one direction to achieve optical anisotropy, then the display can function properly, but the viewing angle characteristic deteriorates causing contrast decrease, black and white reversal, and chromatic aberration
Solution Approach 1:
The patent applies local quality by creating different resistance characteristics in different regions of the pixel electrode structure. Specifically, the voltage dividing resistor is positioned to create a gradient in electrical resistance across the pixel electrode, which in turn creates a gradient in electric field strength. This causes liquid crystal molecules in different spatial locations to tilt at different angles, with molecules near the voltage dividing resistor having smaller tilt angles and molecules in other regions having larger tilt angles. This local variation in molecular orientation compensates for viewing angle limitations while maintaining proper display function.
2Adaptability or versatility
If additional TFTs are added to improve viewing angle characteristic, then the viewing angle can be enhanced, but the device complexity and structure of array substrate increase
Solution Approach 1:
The patent merges the function of the pixel electrode with the voltage dividing resistor into a single integrated structure. Instead of using separate components that would require additional TFTs and control circuits, the voltage dividing resistor is directly formed as part of the pixel electrode structure itself. This integration achieves viewing angle improvement through voltage division while avoiding the need for additional active devices, thereby reducing device complexity and maintaining a simpler array substrate structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the viewing angle of liquid crystal displays by maintaining uniform light emission in various directions without adding additional TFTs, thereby improving the display's viewing angle characteristic and simplifying the array substrate structure.
Implementation Method 1
liquid crystal molecules under an electric field are regularly arranged, so that the liquid crystal molecules exhibit crystal property and have optical anisotropy
Implementation Method 2
the liquid crystal molecules exhibit crystal property and have optical anisotropy
Data Source
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AI summary
An array substrate and a display apparatus are provided according to embodiments of the disclosure. A pixel unit includes a first sub-pixel electrode and a second sub-pixel electrode, the first sub-pixel electrode is connected to a drain of the first TFT, and the second sub-pixel electrode is connected to a drain of the second TFT; a resistance between a source of the first TFT and the data line connected to the first TFT is greater than a resistance between a source of the second TFT and the data line connected to the second TFT; and/or, a resistance between the drain of the first TFT and the first sub-pixel electrode is greater than a resistance between the drain of the second TFT and the second sub-pixel electrode.