Zigzag Slit Electrodes for LCD Side Visibility and Response Time
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Solution Overview
Problem
Liquid crystal display (LCD) technologies face challenges in achieving wide viewing angles and fast response times due to insufficient control of liquid crystals in boundary areas, leading to texture generation and decreased light transmittance, as well as ineffective control of area ratios in unit pixel areas when applying different voltages.
Innovation Solution
An array substrate design featuring first and second pixel electrodes with zigzag slit electrode portions and supporting electrode portions, forming a horizontal electric field, along with data lines and switching elements, allows for improved control of electric fields and area ratios, reducing textures and enhancing transmittance and response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multi-domain technique is used to achieve wide viewing angle and fast response time, then viewing angle and response time are improved, but textures are generated in boundary areas decreasing light transmittance
Solution Approach 1:
The pixel electrode is divided into multiple domains with different alignment directions. Each domain is controlled by separate electrode structures (first and second pixel electrodes with slit electrode portions) that can be independently addressed, allowing liquid crystals in different regions to be oriented in different directions to eliminate boundary textures
Solution Approach 2:
Different regions of the pixel electrode are given different properties through the multi-domain structure. The first and second pixel electrodes create localized electric fields in specific areas, allowing each domain to have optimized liquid crystal alignment for its particular region, thus preventing texture formation at boundaries while maintaining overall performance
2Adaptability or versatility
If voltages of different levels are applied to increase the number of domains, then the number of domains is increased, but area ratio of low and high areas cannot be effectively controlled
Solution Approach 1:
The electrode structures are designed with adjustable geometric parameters (slit width, slit spacing, electrode area ratios) that allow dynamic control of the electric field distribution. By modifying these structural parameters, the area ratios of different voltage domains can be precisely controlled without changing the voltage levels, providing flexibility in domain configuration
Solution Approach 2:
The invention controls domain area ratios by changing the geometric parameters of the electrode structures rather than relying solely on voltage levels. Specifically, the width and spacing of slit electrode portions, as well as the area ratios of first and second pixel electrodes, are adjusted to achieve desired domain area distributions, enabling precise control over the number and size of domains
3Ease of operation
If conventional electrode structures are used, then device complexity is low, but side visibility and response time are insufficient
Solution Approach 1:
The invention introduces a new dimensional approach by using slit electrode portions with specific width-to-length ratios and arranging them in patterns that create horizontal electric fields. This dimensional configuration of the electrodes (with slits extending in specific directions and spaced at specific intervals) enables improved side visibility and response time without requiring complex multi-layer or three-dimensional electrode structures
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
The design decreases textures in unit pixel areas, improves side visibility, and allows for easy adjustment of area ratios, thereby enhancing the display quality and response time of LCDs.
Implementation Method 1
When a voltage is applied to the electrodes, the electric field is generated in the liquid crystal layer. The arrangement of liquid crystals is changed by the electric field, so that the transmittance and polarization state of incident light are controlled
Implementation Method 2
The arrangement of liquid crystals is changed by the electric field, so that the transmittance and polarization state of incident light are controlled
Data Source
AI summary
An array substrate includes first and second pixel electrodes. The first pixel electrode includes a plurality of first slit electrode portions and a first supporting electrode portion connected with the first slit electrode portions. The first slit electrode portions extend in a zigzag fashion along the shape of a unit pixel area and a first direction. The second pixel electrode includes a plurality of second slit electrode portions and a second supporting electrode portion connected with the second slit electrode portion. The second slit electrode portions extend in the zigzag fashion along the shape of the unit pixel area and the first direction. Side visibility and a response time may be improved, so that display quality may be improved.