Array Substrate Shield Layout for Data Line Coupling Reduction
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Solution Overview
Problem
Conventional array substrates suffer from coupling electric fields between data lines and pixel electrodes, leading to deterioration in display quality due to the absence of a conductive shield layer, which affects the voltage applied to pixel electrodes.
Innovation Solution
Incorporating a conductive shield layer that overlaps the data line in a direction perpendicular to the base substrate, along with a black matrix covering the conductive shield layer, to reduce the coupling electric field between the data line and pixel electrode, while maintaining the conductive shield layer's non-contact status with the pixel electrode and data line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive shield layer is added to reduce coupling electric field between data line and pixel electrode, then display quality is improved, but device complexity increases
Solution Approach 1:
A conductive shield layer is introduced as an intermediary component between the data line and pixel electrode. This shield layer, having a different potential from both the data line and pixel electrode, acts as a mediator to reduce the coupling electric field between them, thereby improving display quality while managing the added structural complexity
Solution Approach 2:
The conductive shield layer is positioned in a spatial dimension between the data line and pixel electrode, creating a three-dimensional shielding structure. By utilizing the vertical dimension and positioning the shield layer at a specific height above the data line, the patent effectively reduces coupling interference without requiring lateral expansion of the device
2Reliability
If conductive shield layer is positioned close to data line to enhance shielding effect, then coupling electric field reduction is improved, but risk of contact with data line increases
Solution Approach 1:
The conductive shield layer serves as a protective intermediary that can be positioned close to the data line without causing contact. By giving the shield layer a different potential and using it as a buffer zone, the patent enables close positioning for effective shielding while maintaining electrical isolation and preventing harmful contact
Solution Approach 2:
The conductive shield layer acts as a pre-positioned protective barrier between the data line and pixel electrode. By establishing this shield layer in advance with appropriate potential, the patent creates a cushioning effect that prevents direct interaction and potential contact issues while maintaining effective electric field management
3Reliability
If conductive shield layer is added to alleviate voltage issues, then display quality is improved, but manufacturing process complexity increases
Solution Approach 1:
The conductive shield layer is formed using the same ITO layer material and deposition process as the pixel electrode. By merging the shield layer formation with the existing pixel electrode manufacturing step, the patent adds voltage stabilization functionality without requiring separate manufacturing processes, thereby maintaining ease of manufacture
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 configuration enhances the coupling electric field between the conductive shield layer and data line, thereby reducing the coupling electric field between the data line and pixel electrode, improving display quality by alleviating voltage-related issues and simplifying the manufacturing process.
Implementation Method 1
a conductive shield layer located on a side of the data line facing away from the base substrate... Each of the conductive shield layer and the black matrix at least partially overlaps the data line in a direction perpendicular to the base substrate
Data Source
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AI summary
An array substrate includes a base substrate; a data line located on the base substrate; a conductive shield layer located on a side of the data line facing away from the base substrate; a pixel electrode located on a side of the data line facing away from the base substrate; and a black matrix located on a side of the conductive shield layer facing away from the data line. The conductive shield layer is not in contact with the pixel electrode and the data line. Each of the conductive shield layer and the black matrix at least partially overlaps the data line in a direction perpendicular to the base substrate.