Array Substrate Organic Resin Insulation Aperture Ratio
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Solution Overview
Problem
In TFT-LCD displays, the required spacing between pixel electrodes and gate lines reduces the aperture opening ratio due to light interference, which affects the display's efficiency.
Innovation Solution
An array substrate design featuring an organic resin layer between thin film transistors and pixel electrodes, with pixel electrodes extending over adjacent gate lines, reduces signal interference and parasitic capacitance, allowing for a smaller spacing between electrodes and increased aperture opening ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a certain spacing is set between pixel electrode and gate line to prevent signal interference, then signal interference is reduced, but aperture opening ratio decreases
Solution Approach 1:
An organic resin layer is introduced as an intermediary insulating structure between the gate line and pixel electrode. This mediator provides sufficient electrical isolation to prevent signal interference while allowing the pixel electrode to extend closer to the gate line, thereby increasing the aperture opening ratio without compromising signal integrity
Solution Approach 2:
The invention changes the insulating structure parameters by using an organic resin layer with specific thickness (50-200nm) and material properties. This parameter optimization allows reduced spacing between gate line and pixel electrode while maintaining adequate electrical isolation, resolving the contradiction between interference prevention and aperture maximization
2Area of stationary object
If spacing between pixel electrode and gate line is reduced to increase aperture opening ratio, then aperture opening ratio increases, but signal interference increases
Solution Approach 1:
The organic resin layer serves as a mediator that enables close proximity between pixel electrode and gate line while blocking electrical interference. This intermediary structure allows the system to achieve both high aperture opening ratio and low signal interference simultaneously
Solution Approach 2:
The invention uses composite material structure combining inorganic gate line, organic resin insulating layer, and conductive pixel electrode. This composite approach leverages the insulating properties of organic resin to prevent signal interference while maintaining the electrical conductivity needed for pixel operation at reduced spacing
3Area of stationary object
If pixel electrode extends closer to gate line, then aperture opening ratio increases, but parasitic capacitance increases
Solution Approach 1:
By optimizing the organic resin layer thickness to 50-200nm and selecting appropriate organic resin materials with low dielectric constants, the invention minimizes parasitic capacitance while allowing pixel electrode to extend close to gate line for increased aperture opening ratio
Solution Approach 2:
The organic resin layer acts as an intermediary that reduces parasitic capacitance between gate line and pixel electrode through its insulating properties, enabling closer spacing without significant increase in parasitic capacitance
Data Source
AI summary
An array substrate comprises a plurality of subpixels, each of the subpixels comprising: at least one thin film transistor, an organic resin layer, and uncontacted first pixel electrode and second pixel electrode arranged along the data line direction; the first pixel electrode extends to the above of a first gate line, the second pixel electrode extends to the above of a second gate line, the first gate line and the second gate line are adjacent to each other; the first pixel electrodes of two adjacent subpixels located at two sides of the first gate line are connected above the first gate line, the second pixel electrodes of two adjacent subpixels located at two sides of the second gate line are connected above the second gate line.