Display Panel Signal Mesh Layout for Low Voltage Drop
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Solution Overview
Problem
Display panels experience uneven display due to voltage drops across signal lines with inherent resistances, leading to inconsistent signal transmission.
Innovation Solution
A display panel design incorporating a mesh structure of signal lines with via holes to reduce resistance and stabilize voltage, utilizing a pixel driving circuit with transistors and capacitors to maintain consistent signal levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple planar electrode structure is used, then the device complexity is reduced, but the liquid crystal alignment uniformity deteriorates leading to display defects
Solution Approach 1:
The patent applies asymmetry by designing the electrode pattern with a specific asymmetric configuration where the first and second electrodes have different shapes and positions relative to the pixel center. This asymmetric electrode arrangement creates a controlled non-uniform electric field that compensates for the natural non-uniformity in liquid crystal alignment, thereby improving alignment uniformity without requiring complex additional structures.
Solution Approach 2:
The patent transitions from considering only the two-dimensional electrode plane to incorporating the third dimension by designing electrodes with specific height differences and three-dimensional positioning. The first electrode is positioned at a different height than the second electrode, creating a vertically stratified electric field structure that improves liquid crystal alignment control while maintaining relatively simple electrode fabrication processes.
2Use of energy by moving object
If the pixel electrode area is increased to improve light utilization, then the light utilization rate improves, but the response speed deteriorates due to increased capacitance
Solution Approach 1:
The patent applies local quality by creating non-uniform electric field distribution through strategically positioned electrodes with different areas and shapes. The electric field is concentrated in specific regions where it is most needed for liquid crystal alignment, while other regions have reduced field strength. This localized field optimization allows for larger effective pixel areas without proportionally increasing overall capacitance, thus maintaining response speed while improving light utilization.
Solution Approach 2:
The patent changes the electrical parameters by designing electrodes with specific area ratios and positioning configurations. The first electrode has a different area and position than the second electrode, creating a balanced capacitance distribution. This parameter optimization allows the pixel to achieve higher light utilization through larger effective area while the strategic electrode configuration keeps the total capacitance and RC time constant within acceptable limits for fast response.
3Ease of manufacture
If conventional electrode patterns are used, then the manufacturing process is simple, but liquid crystal alignment defects occur at pixel centers and edges
Solution Approach 1:
The patent applies segmentation by dividing the electrode structure into multiple separate electrode regions (first electrode and second electrode) with distinct functions and positions. Rather than using a single continuous electrode pattern, the electrode layer is segmented into multiple conductive regions that can be independently optimized for their local alignment requirements, reducing defects at pixel centers and edges while maintaining relatively simple fabrication processes.
Solution Approach 2:
The patent introduces an intermediary electrode structure that mediates between the simple planar electrode configuration and the required complex electric field distribution for perfect alignment. The specific electrode pattern design acts as an intermediary that transforms the simple fabricated electrode structure into a controlled non-uniform electric field, serving as a bridge between manufacturing simplicity and alignment quality.
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 mesh structure minimizes voltage drops, ensuring uniform signal transmission and reducing shading effects, thereby enhancing display quality and stability.
Implementation Method 1
conventional liquid crystal display devices use a pixel electrode and a common electrode to generate an electric field to drive alignment of liquid crystal molecules
Data Source
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AI summary
A display panel and a display apparatus. The display panel comprises: a pixel drive circuit, a base substrate, a second conductive layer, and a third conductive layer. The second conductive layer is located at one side of the base substrate, the second conductive layer comprises a plurality of first signal lines (V1), and orthographic projections of a plurality of the first signal lines (V1) onto the base substrate extend along a first direction and are distributed at intervals along a second direction, the first direction and the second direction intersecting; the third conductive layer is located at one side of the second conductive layer away from the base substrate, the second conductive layer comprises a plurality of second signal lines (V2), and orthographic projections of a plurality of the second signal lines (V2) onto the base substrate extend along the second direction and are distributed at intervals along the first direction; wherein the first signal lines (V1) and the second signal lines (V2) are used for providing a same first signal to the pixel drive circuit, and at least a portion of the first signal lines (V1) are connected to at least a portion of the second signal lines (V2) by means of a via hole (H). In the present display panel, the first signal has a lower voltage drop during transmission.