Array Substrate Conductive Shielding Around Pixel Electrodes
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Solution Overview
Problem
Existing display panel technologies face challenges in minimizing the thickness and manufacturing complexity due to the need for insulating layers to shield signal lines from interfering with pixel electrodes, which affects the display's accuracy and stability.
Innovation Solution
An array substrate design featuring an auxiliary conductive structure that surrounds pixel electrodes, made from materials with lower resistivity than the electrodes, to effectively shield interfering charges and reduce interference, while being integrated in the same layer to maintain panel thinness and simplify manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an insulating layer is added between pixel electrodes and signal lines to reduce interference, then the shielding effect is improved, but the display panel thickness increases
Solution Approach 1:
An auxiliary conductive structure is introduced as an intermediary between pixel electrodes and signal lines. This conductive structure forms a shield that intercepts interfering electric field lines before they reach the pixel electrodes, while being positioned in the same layer as the pixel electrodes to avoid increasing panel thickness. The auxiliary conductive structure acts as a mediator that blocks harmful electromagnetic interference without requiring additional insulating layers.
Solution Approach 2:
The patent changes the electrical parameters of the shielding structure by using a conductive material with lower resistivity than the pixel electrode material. This parameter change enables the shielding structure to effectively conduct away interfering charges while maintaining a thin profile. The resistivity parameter is optimized to be less than or equal to that of the pixel electrode material, ensuring effective charge dissipation without requiring thick insulating layers.
2Object-affected harmful factors
If the auxiliary conductive structure is positioned to overlap signal lines for better shielding, then the shielding effectiveness is improved, but the parasitic capacitance increases
Solution Approach 1:
The auxiliary conductive structure is designed with non-uniform local properties: it overlaps signal lines in regions where interference is most severe (near pixel electrodes) while avoiding overlap in other regions. The structure comprises multiple strip portions extending along data lines and gate lines, with varying positions and dimensions. This local quality variation allows effective shielding at critical locations while minimizing overall parasitic capacitance by avoiding unnecessary overlap regions.
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 display's accuracy and stability by preventing charge interference and allows for a more compact, efficiently manufactured display panel with improved electrostatic shielding.
Implementation Method 1
the auxiliary conductive structure surrounds at least one of the plurality of pixel electrodes and is insulated from the plurality of pixel electrodes
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3~4A
AI summary
An array substrate (10) and a display device (16) are provided, and the array substrate includes a base substrate (1) and includes a pixel array (1) and an auxiliary conductive structure (3) which are on the base substrate (1); the pixel array includes a plurality of pixel units (2) arranged in an array and a plurality of pixel electrodes (21), and each of the plurality of pixel units (2) includes at least one of the plurality of pixel electrodes (21); the auxiliary conductive structure (3) surrounds at least one of the plurality of pixel electrodes (21) and is insulated from the plurality of pixel electrodes (21); a resistivity of a material of the auxiliary conductive structure (3) is less than or equal to a resistivity of a material of the at least one of the plurality of the pixel electrodes (21). The auxiliary conductive structure (3) receives and transmits interfering charges around the pixel electrode (21), so that the interfering charges are kept away from the pixel electrode (21), and thereby interference of the interfering charges on the pixel electrode (21) is prevented or reduced.