Display Panel Electrode Openings for Lower Coupling Capacitance
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Solution Overview
Problem
LCD panels face high power consumption and heating issues due to large coupling capacitance, which is exacerbated by increased refresh frequencies in oxide products, affecting yield and display quality.
Innovation Solution
The display panel design includes specific openings in the common electrode that avoid overlapping with connection positions, reducing coupling capacitance by using a black matrix layer to cover these openings, thereby minimizing heat generation and ensuring uniform signal conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the common electrode is provided with openings to reduce coupling capacitance, then power consumption is reduced, but light leakage may occur through the openings
Solution Approach 1:
The black matrix layer serves as an intermediary element positioned between the common electrode openings and the liquid crystal layer. It absorbs or blocks light that would otherwise leak through the openings, while allowing the electrical function of the openings to remain intact for reducing coupling capacitance.
Solution Approach 2:
The common electrode is segmented into multiple regions by providing openings at specific locations. This segmentation removes conductive material from areas where it would create unwanted coupling capacitance with connection positions, while the black matrix layer segments the optical path to prevent light leakage through these same openings.
2Reliability
If the common electrode covers connection positions to ensure signal conduction, then coupling capacitance increases, but power consumption increases
Solution Approach 1:
The invention extracts or removes portions of the common electrode by creating openings at locations where it would overlap with connection positions. This extraction reduces the coupling capacitance between the common electrode and connection positions, thereby reducing power consumption while preserving signal conduction through the pixel circuits.
3Productivity
If the refresh frequency is increased to improve display quality, then display uniformity is improved, but coupling capacitance increases causing overheating
Solution Approach 1:
The invention converts the potentially harmful overlap between the common electrode and connection positions into a beneficial configuration by strategically placing openings. This reduces coupling capacitance and heat generation, allowing higher refresh frequencies to be sustained without overheating, thus converting a design constraint into a performance advantage.
Data Source
AI summary
Provided is display panel. The display panel includes: a base substrate; multiple first signal traces, multiple second signal traces, multiple pixel circuits arranged in an array, multiple pixel electrodes corresponding to the plurality of pixel circuits, a common electrode provided with multiple first openings corresponding to the plurality of pixel circuits, and a black matrix layer, wherein an orthographic projection of each first opening on the base substrate covers orthographic projections of the first connection position, the second connection position, and the third connection position of the pixel circuit corresponding to the first opening on the base substrate, and an orthographic projection of the black matrix layer on the base substrate covers orthographic projections of the first openings on the base substrate.