LCD Panel With Local Insulating-Layer Thickness for Lower Drive Voltage
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Solution Overview
Problem
Existing liquid crystal display devices face the challenge of being unable to simultaneously achieve small parasitic capacitances and low power consumption due to increased insulating layer thicknesses that reduce storage capacitance and require higher driving voltages.
Innovation Solution
A liquid crystal display panel design with varying insulating layer thicknesses, where the thickness in the opening area is less than in the non-opening area, increasing storage capacitance and reducing pixel driving voltage while maintaining smaller parasitic capacitances by adjusting distances between electrodes and wirings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the thickness of the insulating layer is increased to reduce parasitic capacitances, then parasitic capacitances are reduced, but storage capacitance decreases and driving voltage increases, resulting in high power consumption
Solution Approach 1:
The insulating layer is designed with non-uniform thickness, where the thickness varies in different regions (opening area versus non-opening area). Specifically, the insulating layer has a first thickness in the opening area and a second thickness in the non-opening area, with the first thickness being less than the second thickness. This local variation allows optimization of both parasitic capacitances and storage capacitance in different regions simultaneously.
2Object-generated harmful factors
If the thickness of the insulating layer is increased to reduce parasitic capacitances, then parasitic capacitances are reduced, but storage capacitance decreases, requiring higher driving voltage
Solution Approach 1:
The insulating layer thickness is locally optimized: in the opening area (where pixel electrodes are located), the insulating layer has a smaller thickness to increase storage capacitance and reduce driving voltage; in the non-opening area (where parasitic capacitances occur), the insulating layer has a larger thickness to reduce parasitic capacitances. This spatial differentiation resolves the contradiction between storage capacitance and parasitic capacitance.
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 achieves both small parasitic capacitances and low power consumption by enhancing storage capacitance and reducing parasitic capacitances through strategic thickness adjustments in the insulating layer, thereby optimizing panel performance.
Implementation Method 1
the liquid crystal display panel includes an opening area and a non-opening area, and a thickness of the insulating layer in the opening area is less than a thickness of the insulating layer in the non-opening area
Data Source
AI summary
A liquid crystal display panel and a manufacturing method thereof are provided. By allowing a thickness of an insulating layer in an opening area to be less than a thickness of the insulating layer in a non-opening area, a storage capacitance between a first electrode layer and a second electrode layer in the opening area can be increased, a driving voltage of the liquid crystal display panel can be reduced, and power consumption can also be reduced. Meanwhile, since a parasitic capacitance is small, requirements of small parasitic capacitances and low power consumption of the liquid crystal display panel can be simultaneously achieved.