Liquid Crystal Display Slit Layout for Fine Pixels and High Transmittance
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Solution Overview
Problem
Existing display technologies face challenges in maintaining high transmittance while achieving finer pixel definition, as slits in the display devices can overlap signal and scanning lines, leading to reduced light transmission.
Innovation Solution
The display device incorporates a conductive layer with a grid shape that includes a frame portion overlapping signal and scanning lines, and a division line portion dividing each pixel into two sections, along with slits in the common electrode, designed to maintain pixel definition and enhance transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pixels are made finer for higher definition, then definition is improved, but transmittance deteriorates due to slit overlap with signal lines and scanning lines
Solution Approach 1:
The pixel is divided into two sections by the division line portion, and the common electrode includes multiple slits (first slit and second slit) in each pixel. This segmentation allows each slit to be positioned in different regions, preventing overlap with signal lines and scanning lines while maintaining fine pixel definition.
Solution Approach 2:
The conductive layer has different structures in different regions: the frame portion overlaps with signal lines and scanning lines for electrical connection, while the division line portion is positioned to divide the pixel without overlapping critical lines. The slits are strategically positioned in specific sections of the pixel to optimize both definition and transmittance locally.
2Stability of the object's composition
If slits are provided inside the opening surrounded by signal lines and scanning lines, then liquid crystal domains are controlled, but transmittance is reduced due to overlap with signal lines or scanning lines
Solution Approach 1:
The common electrode is divided into multiple slits (first slit and second slit) within each pixel, allowing liquid crystal domains to be controlled at different locations. This segmentation enables domain control without requiring a single large slit that would overlap with signal lines and scanning lines.
Solution Approach 2:
The conductive layer is introduced as an additional layer above the common electrode, providing a new dimensional space for controlling liquid crystal domains. The division line portion and frame portion work together in this additional dimension to achieve domain control while maintaining optical performance.
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 stabilizes liquid crystal domains, improves contrast, and maintains high transmittance even with finer pixel definition, enhancing the display quality.
Implementation Method 1
a liquid crystal layer including a liquid crystal molecule between the array substrate and the counter substrate
Implementation Method 2
The common electrode includes a first slit and a second slit for each pixel... A gap between the first side and the second side gradually decreases toward the second slit
Data Source
AI summary
According to one aspect, a display device includes an array substrate, a counter substrate, and a liquid crystal layer. The array substrate includes signal lines, scanning lines, a common electrode overlapping pixel electrodes, and a conductive layer having a grid shape and a light-blocking property. The conductive layer includes a frame portion overlapping the signal lines and the scanning lines, and a division line portion dividing the pixel into two sections of a first section and a second section. The common electrode includes a first slit and a second slit for each pixel. A gap between a first side and a second side of the first slit gradually decreases toward the second slit. A gap between a third side and a fourth side of the second slit gradually decreases toward the first slit. The division line portion is provided between the first/third sides and between the second/fourth sides.