Array Substrate Light Shielding Structure for Liquid Crystal Display Aperture Ratio
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Solution Overview
Problem
In liquid crystal display panels, signal transmission by data lines creates abnormal electric fields between data lines and pixel electrodes, leading to disordered liquid crystals and light leakage, which is typically addressed by widening the black matrix, thereby affecting the aperture ratio.
Innovation Solution
An array substrate with a light shielding structure comprising a metal layer and transparent layers, where the orthographic projections of gaps between data lines and pixel electrodes are within the light shielding structure, allowing light to be destructively interfered by reflections from the metal and transparent layers, eliminating the need for a wider black matrix and improving the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a wider black matrix is provided to block light leakage, then light leakage is reduced, but the aperture ratio of the liquid crystal display panel is affected
Solution Approach 1:
The invention moves the light shielding function from the traditional black matrix layer to a new dimension - the data line structure itself. By designing the data line with specific width and positioning it to cover the gap area, the light shielding function is achieved through the conductive structure's spatial arrangement rather than through optical filtering layers, thus improving aperture ratio while preventing light leakage
Solution Approach 2:
The invention extracts the light shielding function from the black matrix system and relocates it to the data line structure. The data line is designed with sufficient width to serve dual purposes: electrical signal transmission and optical shielding. This separation allows the black matrix to be minimized or optimized independently while the data line handles the shielding function in the gap region
2Object-affected harmful factors
If the data line width is increased to provide light shielding, then light leakage is reduced, but the signal transmission performance may be affected
Solution Approach 1:
The data line is designed with locally optimized properties: in the gap region, the data line has increased width to provide effective light shielding, while in other regions it maintains standard dimensions for optimal signal transmission. This local variation in geometry allows the structure to fulfill both optical and electrical functions without compromising overall signal performance
Solution Approach 2:
The data line structure functions as a composite system combining electrical conduction and optical shielding properties. By utilizing the data line's metallic or conductive material properties alongside its geometric configuration, the structure achieves dual functionality - electrical signal transmission and light blocking - without requiring separate dedicated structures for each function
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
The solution effectively reduces light leakage and reflection, enhancing the aperture ratio of liquid crystal display panels without the need for a wider black matrix, thereby improving display performance.
Implementation Method 1
allowing light to be destructively interfered by reflections from the metal and transparent layers
Implementation Method 2
allowing light to be destructively interfered by reflections from the metal and transparent layers
Data Source
AI summary
The preset disclosure provides an array substrate and a method for manufacturing the same, a display panel and a display device. The array substrate includes: a base substrate; data lines and pixel electrodes located on the base substrate, and a light shielding structure located on a side of the data lines close to the base substrate, orthographic projections of the gaps on the base substrate are located within an orthographic projection of the light shielding structure on the base substrate, and the light shielding structure includes a metal layer and a first transparent layer located on a side of the metal layer away from the base substrate.