LCD Pixel Structure Data Line Relocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display (LCD) pixel designs suffer from vertical crosstalk and reduced transmittance due to capacitance coupling between data lines and transparent electrodes, leading to manufacturing challenges such as short-circuiting and low yield rates.
Innovation Solution
The design incorporates a pixel structure with sub-pixel areas and data lines positioned between display domains and at the edges of pixel areas, utilizing transistors to control sub-pixel electrodes, which reduces capacitance coupling and maintains transmittance while preventing short-circuiting by ensuring adequate distance between data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data lines are disposed within the transmitting area to achieve dot conversion, then the aperture rate is affected and transmittance decreases
Solution Approach 1:
The patent extracts the data lines from the transmitting area and relocates them to the non-transmitting area (the black matrix region). This separation removes the obstructing element (data lines) from the light transmission path, thereby restoring transmittance while preserving the dot conversion capability through alternative positioning.
Solution Approach 2:
The patent changes the spatial dimension of data line placement from within the pixel's transmitting area to the peripheral non-transmitting area. This dimensional relocation allows the data lines to serve their electrical function without interfering with the optical transmission path, resolving the contradiction between manufacturing layout and optical performance.
2Ease of manufacture
If data lines are disposed within the transmitting area, then capacitance coupling effect occurs between data lines and transparent electrode causing vertical crosstalk
Solution Approach 1:
The patent extracts the data lines from the transmitting area where they would capacitively couple with the transparent electrode, and relocates them to the non-transmitting area. This removal from the harmful interaction zone eliminates the capacitance coupling effect and the resulting vertical crosstalk, while the data lines remain functional for pixel driving.
Solution Approach 2:
The patent introduces the black matrix as an intermediary structure that physically separates the data lines from the transparent electrode in the transmitting area. This intermediary barrier reduces the capacitance coupling effect by increasing the distance and providing electrical isolation, thereby preventing vertical crosstalk while allowing both components to coexist in the display structure.
3Ease of manufacture
If data lines are positioned too close together to achieve dot conversion, then manufacturing short-circuiting occurs
Solution Approach 1:
The patent extracts the data lines from the constrained transmitting area and relocates them to the more spacious non-transmitting area. This relocation provides sufficient spacing between adjacent data lines, eliminating the risk of manufacturing-induced short-circuits while preserving the dot conversion functionality through the alternative layout configuration.
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 configuration effectively minimizes vertical crosstalk, maintains high transmittance, and improves manufacturing yield by controlling the tilting directions of liquid crystal molecules and preventing data line short-circuits, resulting in a high-quality LCD with improved display symmetry and efficiency.
Implementation Method 1
each pixel area includes a first sub-pixel area and a second sub-pixel area... The first sub-pixel electrode and the second sub-pixel electrode are respectively disposed in the first sub-pixel area and the second sub-pixel area
Implementation Method 2
Due to the capacitance coupling effect between the data lines and the transparent electrode, the pixel area that is not driven originally will be affected by the driving of neighboring pixel area
Data Source
AI summary
A pixel structure of liquid crystal display including a first and a second sub-pixel electrodes, a first and a second data lines, a gate line, and a first and a second transistors is provided. The first and the second sub-pixel electrodes disposed in the first and second sub-pixel areas respectively include at least two display domains at left and right. The first data line is disposed under the interface between two domains of each of the first and second sub-pixel electrodes, and the second data line is disposed under the edges of the first and second sub-pixel electrodes. The gate line is disposed between the first and second sub-pixel areas. The first sub-pixel electrode is controlled by the gate line and the first data line through the first transistor. The second sub-pixel electrode is controlled by the gate line and the second data line through the second transistor.