Array Substrate Electrode Design for LCD Black Line Prevention
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Solution Overview
Problem
Liquid crystal displays (LCDs) suffer from liquid crystal disclination issues due to uncontrolled liquid crystal movement, resulting in black lines in pixels, particularly because the voltage on data lines changes continuously, causing conflict and preventing horizontal alignment of liquid crystals.
Innovation Solution
The array substrate design includes a base substrate with data lines, gate lines, and electrodes where the second electrode has a symmetry axis perpendicular to the gate line, with a frame and electrode strips, and the opening side of the frame faces signal lines other than data lines, ensuring electrical signals remain mostly unchanged, preventing black lines by controlling liquid crystal movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second electrode uses a symmetric structure with electrode strips extending in multiple directions, then liquid crystal alignment is improved and black lines are prevented, but the device complexity increases due to the complex electrode configuration
Solution Approach 1:
The patent applies asymmetry by making the frame structure asymmetric with an opening side that faces away from data lines. The electrode strips are configured with different extending directions (third direction and fourth direction) relative to the symmetry axis, creating an asymmetric electric field distribution that prevents liquid crystal disclination while maintaining overall device functionality
Solution Approach 2:
The second electrode is segmented into multiple electrode strips (first group extending in third direction, second group extending in fourth direction) arranged symmetrically around a central symmetry axis. This segmentation creates multiple controlled electric field regions that work together to prevent black lines while managing the complexity through modular configuration
2Device complexity
If the frame opening faces data lines, then the structure is simpler, but voltage changes on data lines cause liquid crystal conflict and black lines
Solution Approach 1:
The patent applies preliminary anti-action by positioning the frame opening to face away from data lines, anticipating and preventing the harmful effect of voltage changes on data lines before they can cause liquid crystal disclination. This proactive configuration counteracts the potential conflict between data line voltage variations and liquid crystal alignment
Solution Approach 2:
The patent converts the potential harm from data line voltage changes into a benefit by strategically positioning the frame opening away from data lines. This configuration transforms what would be a source of liquid crystal conflict into a design feature that actively prevents black lines, making the voltage variability on data lines harmless or even beneficial for overall display stability
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 prevents black lines in pixels by maintaining consistent electrical signals, allowing liquid crystals to align properly under varying voltages, improving display quality by ensuring liquid crystals are driven in the correct direction.
Implementation Method 1
the second electrode includes: a frame with an opening in a side, and a first group of electrode strips and a second group of electrode strips located in the frame and disposed on two sides of the symmetry axis respectively
Data Source
AI summary
The present disclosure discloses an array substrate, a liquid crystal display panel and a display device. The array substrate includes: a base substrate, and a first electrode and a second electrode located in a region defined by intersection of two adjacent data lines, a gate line and a common electrode signal line, where the second electrode is located on a side of the first electrode facing away from the base substrate; the first electrode is in a block shape; the second electrode has a symmetry axis perpendicular to the gate line and passing through the center of the second electrode; the second electrode includes: a frame with an opening in a side; an opening side of the frame faces a first type of signal lines; the first type of signal lines are other signal lines than the data lines and signal lines parallel to the data lines.