Pixel Electrode Slit Layout for Liquid Crystal Fringe Field Control
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Solution Overview
Problem
Current electronic display devices face challenges in achieving high display quality due to issues with liquid crystal efficiency and fringe field effects, which affect the brightness and contrast of pixels.
Innovation Solution
The display device incorporates a substrate with transistors, pixel electrodes, and conductive layers featuring slits that overlap, optimizing the electric field to enhance liquid crystal efficiency by either increasing horizontal lateral electric fields or reducing vertical lateral electric fields, thereby improving pixel brightness and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conductive layers without slits are used, then the device structure is simple, but the liquid crystal efficiency is insufficient and fringe field effects reduce display quality
Solution Approach 1:
The conductive layers are divided into multiple segments by introducing first and second slits that overlap with each other. This segmentation creates multiple electric field regions that work together to improve liquid crystal efficiency while reducing harmful fringe field effects at pixel boundaries.
Solution Approach 2:
The slits are positioned at specific locations within the conductive layers, creating localized electric field enhancements where needed. The overlapping slit configuration provides different local field characteristics to optimize liquid crystal alignment and reduce fringe effects in critical areas.
2Manufacturing precision
If the conductive layers are configured to improve liquid crystal efficiency, then display quality improves, but the manufacturing process becomes more complex
Solution Approach 1:
The slit configuration extends the control of electric fields into the vertical dimension by overlapping conductive layers at different heights. This multi-layer approach allows precise field control without requiring extremely precise lateral alignment, as the overlapping vertical structure provides tolerance to manufacturing variations.
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 enhances liquid crystal efficiency, increasing the area of bright fringes and overall display quality, as demonstrated by improved light transmittance and contrast ratios.
Implementation Method 1
a horizontal lateral electric field generated by the first slit and the first pixel electrode or the second pixel electrode may be increased
Implementation Method 2
a vertical lateral electric field generated by the first slit and the first pixel electrode or the second pixel electrode may be reduced
Data Source
AI summary
A display device includes a substrate, a transistor, a pixel electrode, a first conductive layer and a second conductive layer. The transistor is disposed on the substrate. The pixel electrode is disposed on the substrate. The pixel electrode is electrically connected to the transistor. The first conductive layer is disposed on the pixel electrode. The first conductive layer has a first slit. The second conductive layer is disposed on the pixel electrode. The second conductive layer has a second slit. The first slit and the second slit are overlapped with the pixel electrode.