Slit Electrode Configuration for Wide Viewing Angle LCD Contrast
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Solution Overview
Problem
Current LCD panels face challenges in achieving high contrast at large viewing angles, which is essential for high-demand applications such as automotive displays.
Innovation Solution
The proposed solution involves an array substrate with a specific configuration, including a base substrate, electrode layers, and slit electrodes. The slit electrodes have slits with a first slit section oriented at an angle between 69° and 85° relative to the row direction, and additional slit sections that enhance the electric field balance and brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electrode configurations are used, then manufacturing is simpler, but contrast at large viewing angles deteriorates
Solution Approach 1:
The electrode is divided into multiple slit sections (first slit section, second slit section, third slit section) with different orientations. The first slit section is inclined at 69°-85° relative to the row direction, while the second and third slit sections are inclined at smaller angles, creating a segmented electrode structure that improves contrast at large viewing angles by optimizing electric field distribution in different regions.
Solution Approach 2:
Different portions of the electrode are assigned different local characteristics through varying slit orientations and angles. The first slit section has a steeper inclination (69°-85°) to optimize electric field distribution for improved contrast, while the second and third slit sections have shallower inclinations to balance the overall electric field and maintain brightness uniformity across the display.
2Manufacturing precision
If slit electrode angle is optimized for contrast, then viewing angle performance improves, but light efficiency may deteriorate
Solution Approach 1:
Multiple slit sections with different angles are combined into a single integrated electrode structure. The first, second, and third slit sections work together to simultaneously achieve high contrast ratio and maintain light efficiency, as the combined electric field distribution optimizes both contrast enhancement and light transmission properties.
Solution Approach 2:
The patent optimizes specific parameters including the angle of the first slit section (69°-85°), the angles of the second and third slit sections (smaller than the first), and the relative positions and dimensions of these sections. By carefully controlling these parameters, the electrode achieves both improved contrast ratio and maintained light efficiency through balanced electric field distribution.
3Manufacturing precision
If complex multi-section slit configuration is used, then viewing angle contrast improves, but liquid crystal recovery time may increase
Solution Approach 1:
The slit electrode employs asymmetric angle configurations where the first slit section has a steeper inclination (69°-85°) than the second and third slit sections. This asymmetric design creates optimized electric field distribution that improves contrast at wide viewing angles while the specific angular relationships between sections help control liquid crystal molecule orientation and recovery dynamics.
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 significantly improves the contrast of the LCD panel, especially at wide viewing angles, while maintaining high light efficiency and fast liquid crystal recovery time, making it suitable for high-end applications like automotive displays.
Implementation Method 1
one of the first electrode layer and the second electrode layer is provided with a slit electrode
Data Source
AI summary
An array substrate (ARR) includes a base substrate (BP), a first electrode layer (EDLA), an insulating layer (PVX) and a second electrode layer (EDLB) stacked in sequence; where one of the first electrode layer (EDLA) and the second electrode layer (EDLB) is provided with a slit electrode (SLD); the array substrate (ARR) further includes a plurality of data lines (DataL), and a part of the data lines (DataL) adjacent to the slit electrode (SLD) extends linearly along a column direction (DV); the slit electrode (SLD) is provided with a plurality of slits (SL), the slits (SL) include a first slit section (SLA), and an angle between an extending direction of the first slit section (SLA) and a row direction (DH) is in a range of 69° to 85°.