Liquid Crystal Display Capacitance Compensation Shading Region
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display panels experience serious flickering due to increased voltage differences between moments before and after the jump of the pixel electrode voltage, exacerbated by larger capacitance between the gate line and source, which is not effectively addressed by existing technologies.
Innovation Solution
The solution involves a liquid crystal display panel design where the pixel electrode has a capacitance compensation portion within the shading region, opposite to a portion of the common electrode, increasing the overlap area and compensating storage capacitance between the pixel and common electrodes, thereby reducing voltage differences and improving flicker issues without affecting the aperture rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the area of the pixel electrode is reduced to improve resolution, then the resolution is improved, but the storage capacitance between the pixel electrode and the common electrode becomes smaller, causing serious flickers
Solution Approach 1:
The patent extends the overlap area from the traditional two-dimensional light transmitting region into the shading region, creating a three-dimensional capacitance compensation structure. The capacitance compensation portion is positioned in the shading region opposite to the common electrode, adding a new spatial dimension to the capacitance formation area without affecting the aperture rate.
Solution Approach 2:
The patent applies different functional zones within the pixel region: the light transmitting region maintains its original function for optimal aperture, while the shading region contains the capacitance compensation portion that specifically addresses the capacitance issue. This local differentiation allows the pixel electrode to serve dual purposes in different areas.
2Ease of manufacture
If the capacitance between the gate line and source is increased (using oxide active layer), then the manufacturing process is simplified, but the voltage difference between moments before and after the jump of the pixel electrode voltage becomes larger, causing serious flickers
Solution Approach 1:
The patent introduces a feedback mechanism by adding the capacitance compensation portion that specifically compensates for the increased Cgs capacitance. This compensation feedback loop counteracts the voltage difference caused by the larger Cgs, effectively neutralizing the harmful effect while maintaining the simplified oxide-based manufacturing process.
Solution Approach 2:
The patent changes the physical parameter of the pixel electrode by adding the capacitance compensation portion, which modifies the overall capacitance characteristics of the pixel region. This parameter change compensates for the increased Cgs and reduces the voltage difference that causes flicker.
3Reliability
If the overlap area of the pixel electrode and the common electrode is increased to compensate storage capacitance, then the storage capacitance is compensated, but the aperture rate may be affected
Solution Approach 1:
The patent segments the pixel region into distinct functional areas: the light transmitting region for optimal aperture and the shading region for capacitance compensation. By segmenting the functions spatially, the patent can optimize each region for its specific purpose without compromising the overall aperture rate.
Solution Approach 2:
The patent utilizes the shading region, which is typically considered a non-aperture area, to create the capacitance compensation portion. By moving the capacitance formation function to the shading region's three-dimensional space, the patent increases overlap area without sacrificing the two-dimensional aperture rate.
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 effectively reduces voltage differences and improves flicker in liquid crystal display panels by increasing the overlap area of the pixel and common electrodes in the shading region, minimizing light leakage and enhancing display quality.
Implementation Method 1
the capacitance compensation portion is arranged opposite to a portion of the common electrode located within the shading region... increases the overlap area of the pixel electrode and the common electrode... correspondingly compensates the storage capacitance between the pixel electrode and the common electrode
Data Source
AI summary
The present invention discloses a liquid crystal display panel and a display device. A capacitance compensation portion is arranged using a shading region, and the capacitance compensation portion is arranged opposite to a portion of a common electrode located within the shading region. Compared to the case where a common electrodes and a pixel electrode are overlapped only in a light transmitting region, the present invention enlarges the overlap area of the pixel electrode and the common electrode in the shading region, compensates the storage capacitance between the pixel electrode and the common electrode, and reduces the voltage difference before and after jump of the voltage of the pixel electrode, and improves the flicker of a liquid crystal display panel. Moreover, as the capacitance compensation portions additionally provided in the pixel electrodes are located within the shading region, the aperture rate of pixel regions will not be influenced.