Transparent Electrode Storage Capacitance for Display Leakage
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Solution Overview
Problem
Current liquid crystal displays experience pixel electrode leakage, leading to decreased voltage and brightness, especially in low-frequency display modes, and flickering issues when switching between high and low frequencies.
Innovation Solution
A display panel structure that includes a drive circuit layer, a color photoresist layer with color filters, a common electrode layer with a transparent electrode connected to the common wire, an insulating layer, and a pixel electrode layer, where the transparent electrode forms a storage capacitance with the pixel electrodes to maintain voltage and alleviate leakage, allowing light to pass through without affecting display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If frequency conversion display technology is adopted to eliminate image tearing and fluctuation, then display smoothness is improved, but pixel electrode leakage increases in low-frequency mode leading to decreased brightness
Solution Approach 1:
The invention introduces a transparent electrode layer that is segmented into multiple regions corresponding to different pixel electrodes. This segmentation allows each pixel electrode to have its own dedicated transparent electrode region, enabling independent capacitance formation and voltage maintenance for each pixel, thereby preventing leakage-induced brightness loss while maintaining overall display smoothness.
Solution Approach 2:
The transparent electrode is formed in advance during the manufacturing process, creating storage capacitance structures before the display operates. This preliminary action ensures that voltage is pre-stored in the capacitance formed between the transparent electrode and pixel electrodes, so when leakage occurs during low-frequency operation, the stored voltage compensates for the loss and maintains brightness.
2Reliability
If a transparent electrode is added to form storage capacitance, then pixel electrode leakage is reduced, but device complexity increases
Solution Approach 1:
The transparent electrode serves multiple functions simultaneously: it acts as an electrode for forming storage capacitance with pixel electrodes, serves as a common electrode for the liquid crystal layer, and provides a structural base for subsequent color filter and insulation layers. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving voltage stability.
Solution Approach 2:
The invention uses transparent conducting oxide materials (such as ITO - indium tin oxide) that combine electrical conductivity with optical transparency. This composite material property allows the electrode to simultaneously perform electrical functions (forming capacitance, maintaining voltage) and optical functions (allowing light passage), thereby achieving reliability improvement without proportionally increasing structural complexity.
3Reliability
If the transparent electrode covers the entire display region, then storage capacitance is maximized, but manufacturing precision requirements increase
Solution Approach 1:
The transparent electrode is designed with locally optimized properties: in regions where pixel electrodes are located, the transparent electrode forms capacitance structures with specific geometries and distances to maximize storage effect; in other regions, the transparent electrode maintains uniform coverage for common electrode function. This local quality differentiation allows effective capacitance formation without requiring uniform high precision across the entire display area.
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 pixel electrode leakage, enhances display quality by maintaining voltage in low-frequency modes, and prevents flickering when switching frequencies, improving overall display performance.
Implementation Method 1
the transparent electrode forms a storage capacitance with the pixel electrodes to maintain voltage and alleviate leakage
Data Source
AI summary
The present disclosure provides a display panel and a display panel manufacturing method. The display panel includes a drive circuit layer, a color photoresist layer disposed on the drive circuit layer, a common electrode layer disposed on the color photoresist layer, and a pixel electrode layer disposed on the common electrode layer. The drive circuit layer is provided with a common wire, the common electrode layer is provided with a transparent electrode, the transparent electrode is electrically connected to the common wire, and the pixel electrode layer is provided with a plurality of pixel electrodes.