Domain-Dividing Electrode for LCD Viewing Angle and Texture Error Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display (LCD) devices face reduced display quality due to texture errors generated by openings in the common electrode during the patterning process, which affect the viewing angle and overall image quality.
Innovation Solution
An array substrate with a domain-dividing electrode that divides pixel parts into multiple areas, allowing for enhanced viewing angles and improved display quality without the need for patterning the common electrode, utilizing gate lines, data lines, switching elements, and a voltage-changing part to control voltage levels and optimize the electric field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the common electrode is patterned with openings to form domain areas, then the viewing angle is enhanced, but texture errors are generated that reduce display quality
Solution Approach 1:
A domain-dividing electrode is introduced as an intermediary element between the pixel electrode and the common electrode. This domain-dividing electrode divides the pixel electrode into multiple pixel parts and creates domain areas without requiring openings in the common electrode, thus achieving wide viewing angle while maintaining display quality.
Solution Approach 2:
The pixel electrode is segmented into multiple pixel parts by the domain-dividing electrode. This segmentation creates multiple domain areas within each pixel, enabling wide viewing angle characteristics while avoiding the need to pattern the common electrode with openings.
2Adaptability or versatility
If the common electrode is patterned with openings, then domain areas are formed for PVA mode operation, but the patterning process causes texture errors
Solution Approach 1:
The domain-dividing electrode serves as a mediator that enables PVA mode operation by creating domain areas through its structure rather than through openings in the common electrode. This eliminates the texture errors associated with common electrode patterning while maintaining the ability to operate in PVA mode.
Solution Approach 2:
The function of creating domain areas is extracted from the common electrode and transferred to the domain-dividing electrode. By removing the requirement for common electrode patterning, the harmful texture errors are eliminated while the essential PVA mode functionality is preserved.
3Manufacturing precision
If a domain-dividing electrode is added to divide pixel parts, then viewing angle is enhanced and texture errors are suppressed, but device complexity increases
Solution Approach 1:
The domain-dividing electrode performs multiple functions: it divides the pixel electrode into pixel parts, creates domain areas for wide viewing angle, and eliminates the need for common electrode patterning. By consolidating these functions into a single element, the overall device complexity is managed while achieving improved display quality.
4Manufacturing precision
If the voltage-changing part is used to control voltage levels of pixel parts and domain-dividing electrode, then image quality is enhanced, but the number of switching elements increases
Solution Approach 1:
Different voltage levels are applied to different regions (pixel parts and domain-dividing electrode) to optimize the electric field distribution locally. This local quality control enhances image quality by improving liquid crystal alignment and response, while the voltage-changing part manages these local variations efficiently.
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 solution enhances the viewing angle and display quality of LCDs by maintaining image clarity even without patterning the common electrode, thereby reducing texture errors and improving the overall image presentation.
Implementation Method 1
The voltage-changing part may include a voltage-changing transistor, a voltage-increasing capacitor and a voltage-decreasing capacitor
Implementation Method 2
When an electric field is applied to the liquid crystal layer, an arrangement of liquid crystal molecules of the liquid crystal layer is altered to change optical transmissivity
Data Source
AI summary
An array substrate includes first and second gate lines, a data line, a pixel electrode, a domain electrode, first, second and third switching elements, and a voltage-changing part. The domain-dividing electrode divides the first and second pixel parts into a plurality of areas. The first, second and third switching elements are controlled by a first gate signal applied from the first gate line. The first, second and third switching elements apply a data signal received from the data line to the first and second pixel parts and the domain-dividing electrode, respectively. The voltage-changing part is controlled by a second gate signal applied from the second gate line. The voltage-changing part increases a voltage level of the domain-dividing electrode and decreases a voltage level of the second pixel part.