Array Substrate Pixel Electrode Shielding Design
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Solution Overview
Problem
Conventional display technologies suffer from reduced aperture ratio and transmittance due to metal electrode plates for light shielding, which interfere with data lines and decrease the effectiveness of pixel electrodes.
Innovation Solution
The introduction of an array substrate design featuring pixel units with a main and auxiliary display area, where a second pixel electrode extending part is positioned between data lines and first pixel electrodes, eliminating the need for metal electrode plates for light shielding, thereby increasing aperture ratio and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal electrode plates for light shielding are disposed between data lines and pixel electrodes, then data line signals are shielded from interfering with pixel electrode signals, but the aperture ratio and transmittance are lowered
Solution Approach 1:
The patent removes the metal electrode plates for light shielding from the display structure. Instead of using separate shielding plates, the data lines themselves are designed to provide shielding functionality while maintaining a high aperture ratio. This extraction of the shielding function from dedicated metal plates allows the aperture ratio to increase without compromising signal shielding effectiveness.
Solution Approach 2:
The data lines are designed to serve multiple functions: they carry signal data and simultaneously provide shielding against electromagnetic interference. By making the data lines multi-functional, the patent eliminates the need for separate shielding structures, thereby increasing the aperture ratio while maintaining reliable signal shielding.
2Reliability
If common electrode plates are disposed on array substrate and color filter substrate, then data line signals are shielded from interfering with pixel electrode signals, but the area of pixel electrodes is decreased
Solution Approach 1:
The patent removes the common electrode plates structure and integrates the shielding function directly into the data line design. This extraction eliminates the need for additional electrode plates that would reduce pixel electrode area, while maintaining effective shielding through the reconfigured data line arrangement.
Solution Approach 2:
The shielding function previously performed by separate common electrode plates is merged into the data line structure itself. By combining the signal transmission and shielding functions into the data lines, the patent increases pixel electrode area while maintaining signal shielding effectiveness.
3Reliability
If metal electrode plates for light shielding are used, then data line signal interference is prevented, but transmittance is lowered
Solution Approach 1:
The patent removes metal electrode plates for light shielding that blocked light transmission. By extracting this shielding function and replacing it with a design where data lines provide shielding through their arrangement and insulation structure, the patent maintains signal shielding while significantly improving light transmittance.
Solution Approach 2:
The patent replaces the physical metal shielding plates with an electrical/insulation-based shielding mechanism. The insulation layers and spatial arrangement of data lines create electromagnetic shielding without the need for opaque metal structures, thereby maintaining shielding effectiveness while improving optical transmittance.
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 aperture ratio and transmittance by shielding the effect of data lines on pixel electrodes, improving viewing angles and brightness, particularly in middle or low gray levels, while maintaining insulation and reducing cross-interference risks.
Implementation Method 1
the second pixel electrode extending part is disposed between the first pixel electrode and a corresponding one of the data lines, and the second pixel electrode extending part surrounds a part of the first pixel electrode near the corresponding one of the data lines
Data Source
AI summary
An array substrate is provided. The array substrate includes: a substrate; a plurality of scan lines; a plurality of data lines; and a plurality of pixel units disposed in a matrix. In two adjacent ones of the pixel units in two adjacent rows, a second pixel electrode in an auxiliary area of one of the two adjacent ones of the pixel units extends to a main display area of the other of the two adjacent ones of the pixel units. A second pixel electrode extending part is disposed between a first pixel electrode and a corresponding one of the data lines. A metal electrode plate for light shielding is not disposed in an area in which the second pixel electrode extending part is disposed, and thus a transmittance is increased.