LCD Storage Wiring Segmentation for Pixel Defect Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
LCD display panels suffer from pixel defects due to storage wiring defects, which affect the maintenance of pixel voltages and lead to incorrect control of liquid crystal material, resulting in defective pixels.
Innovation Solution
The implementation of a display substrate with a thin film transistor (TFT) layer, featuring first and second storage wirings and a storage duplication wiring, which are electrically connected to maintain pixel voltages across sub-electrodes, preventing voltage disruptions and ensuring proper pixel control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single storage wiring is used to maintain pixel voltages in divided sub-electrodes, then the device complexity is reduced, but the reliability of voltage maintenance deteriorates due to increased defect occurrence
Solution Approach 1:
The storage wiring is segmented into multiple independent wirings (first storage wiring and second storage wiring), each serving a specific sub-electrode. This segmentation allows independent voltage maintenance for each sub-electrode, preventing defect propagation and improving reliability without significantly increasing overall system complexity.
Solution Approach 2:
Different storage wirings are assigned to different sub-electrodes based on their specific voltage requirements. The first storage wiring maintains the first pixel voltage for the first sub-electrode, while the second storage wiring maintains the second pixel voltage for the second sub-electrode, providing localized quality control for voltage maintenance.
2Adaptability or versatility
If the pixel electrode is divided into first and second sub electrodes to improve side viewing angle, then the viewing angle performance is improved, but the number of storage capacitor defects increases
Solution Approach 1:
The pixel electrode is divided into first and second sub-electrodes with different voltages applied to achieve improved side viewing angle. Correspondingly, the storage wiring is segmented into first and second storage wirings, each maintaining voltage for its associated sub-electrode, thereby preventing defect propagation and ensuring reliable storage capacitor formation for each segment.
Solution Approach 2:
The storage duplication wiring serves multiple functions: it acts as a backup path for voltage maintenance, provides electrical connection between storage wirings, and enables redundant capacitor formation. This multi-functionality allows the system to maintain viewing angle performance while compensating for increased defect susceptibility.
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 reduces the occurrence of pixel defects, enhancing the image quality of LCD display panels by ensuring consistent voltage maintenance across the unit pixel area, even in cases of wiring disconnection or short-circuiting.
Implementation Method 1
The first sub electrode receives a first pixel voltage from the TFT layer, and the second sub electrode is electrically separated from the first sub electrode and receives a second pixel voltage from the TFT layer
Implementation Method 2
The electric charge coupled onto the pixel electrode maintains the electric field between the two electrodes during an image frame by means of a storage capacitor formed in the unit pixel area between an associated storage wiring and the pixel electrode
Implementation Method 3
An electric field is formed between the pixel electrode and the common electrode that controls the arrangement of the molecules of the liquid crystal material and thereby controls the amount of light transmitted through the pixel
Data Source
AI summary
A substrate for an LCD includes a transparent substrate, a pixel electrode, first and second storage wirings, and a storage duplication wiring. The pixel electrode is patterned as a unit pixel area on a thin film transistor layer formed on the substrate. The pixel electrode includes a first sub electrode receiving a first pixel voltage from the thin film transistor layer and a second sub electrode electrically separated from the first sub electrode and receiving a second pixel voltage. The first and second storage wirings are formed in the unit pixel area and respectively maintain the first and second pixel voltages during an image frame. The storage duplication wiring is formed along edges of the unit pixel area and is electrically connected to the first and second storage wirings. The substrate reduces pixel defects and improves display image quality.