Strip-Shaped Electrode Arrangement for Liquid Crystal Display Transmittance
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Solution Overview
Problem
The manufacturing cost of transverse-electric-field-mode liquid crystal display devices is high due to the need for separate manufacturing lines, and they suffer from lower transmittance compared to vertical-electric-field-mode devices, while maintaining wide viewing angle characteristics.
Innovation Solution
A liquid crystal display device with a pixel electrode on an array substrate and a counter-electrode on a counter-substrate, where the pixel electrode includes a first major electrode portion and the counter-electrode includes second major electrode portions arranged in a comb-tooth pattern, allowing for a transverse electric field parallel to the substrate and improving transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transverse electric field mode liquid crystal display device is fabricated using a conventional process, then the manufacturing cost increases due to the need for separate manufacturing lines or reassembly, but the device achieves wide viewing angle characteristics
Solution Approach 1:
The pixel electrode is divided into multiple strip-shaped electrodes arranged in parallel, and the counter-electrode is divided into multiple strip-shaped electrodes arranged in parallel. This segmentation allows the transverse electric field to be generated through alternating arrangement of pixel electrodes and counter-electrode strips, enabling wide viewing angle characteristics while maintaining compatibility with conventional manufacturing processes
Solution Approach 2:
The invention transitions from a conventional point-to-point electrode configuration to an extended strip-shaped electrode configuration. By extending the electrodes in one dimension and arranging them in parallel strips with alternating polarity, the device generates a transverse electric field that provides wide viewing angle characteristics while using standard manufacturing techniques
2Adaptability or versatility
If a transverse electric field mode liquid crystal display device is fabricated using a conventional process, then the manufacturing cost increases due to the need for separate manufacturing lines or reassembly
Solution Approach 1:
Both the pixel electrode and counter-electrode are segmented into multiple parallel strip-shaped electrodes. This segmentation enables the use of conventional thin-film transistor array substrate manufacturing processes while achieving the desired transverse electric field configuration, thereby reducing manufacturing process complexity
Solution Approach 2:
The strip-shaped electrode configuration serves multiple functions: it generates the transverse electric field necessary for wide viewing angle characteristics, maintains compatibility with conventional manufacturing processes, and enables alternating arrangement with counter-electrode strips. This multi-functionality reduces the need for specialized manufacturing lines
3Adaptability or versatility
If a transverse electric field is generated in a liquid crystal display device, then the viewing angle characteristic is improved, but the transmittance is lower compared to vertical electric field mode devices
Solution Approach 1:
The invention extends the electrode configuration from point-to-point to strip-shaped electrodes arranged in parallel. This dimensional extension allows the electric field to be generated in a manner that improves viewing angle characteristics while minimizing the impact on light transmittance through optimized strip width and spacing
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 manufacturing costs, enhances transmittance, and maintains wide viewing angle characteristics, resulting in improved display quality.
Implementation Method 1
liquid crystal molecules are switched by a transverse electric field that is substantially parallel to the major surface of the array substrate
Implementation Method 2
a transverse electric field (including a fringe electric field), such as an IPS (In-Plane Switching) mode or an FFS (Fringe Field Switching) mode
Implementation Method 3
the liquid crystal molecules rotate in a plane that is substantially parallel to the major surface of the substrate
Implementation Method 4
polarizer plates, which are disposed such that their axes of polarization intersect at right angles
Data Source
AI summary
A liquid crystal display device includes an array substrate including a pixel electrode which is disposed in each of pixels, a counter-substrate which is disposed to be opposed to the array substrate and includes a counter-electrode which is common to a plurality of the pixels, and a liquid crystal layer which is held between the array substrate and the counter-substrate. The pixel electrode includes a first major electrode portion having a strip shape, and the counter-electrode includes second major electrode portions each having a strip shape, the second major electrode portions being disposed in parallel to the first major electrode portion in a manner that the first major electrode portion is interposed between the second major electrode portions and that the first major electrode portion and the second major electrode portions are alternately arranged.