LCD Sub-Pixel Electrode Angles for Response Speed and Luminance
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Solution Overview
Problem
Liquid crystal displays (LCDs) face challenges in achieving improved response speed and enhanced luminance, particularly in maintaining high contrast ratios and wide viewing angles while preventing the occurrence of textures and luminance inversion.
Innovation Solution
The design incorporates first and second sub-pixel electrodes with micro-patterns and a connecting portion forming an angle of 45 degrees or -45 degrees with respect to the gate lines, along with serrated micro-patterns at the edges of the electrodes to strengthen the lateral electric field, and applies different gray voltage sets to improve visibility and response speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional VA mode LCD structure is used, then high contrast ratio is achieved, but response speed is slow
Solution Approach 1:
The pixel electrode is divided into multiple sub-pixel electrodes (first sub-pixel electrode, second sub-pixel electrode, third sub-pixel electrode) with different orientations. Each sub-pixel electrode applies electric field in a specific direction, enabling faster response while maintaining overall contrast ratio through coordinated operation of segmented elements.
Solution Approach 2:
The sub-pixel electrodes are designed with asymmetric orientations relative to the gate lines. The first sub-pixel electrode forms a first angle, the second sub-pixel electrode forms a second angle, and the third sub-pixel electrode forms a third angle, creating asymmetric electric field distributions that improve response speed without sacrificing contrast ratio.
2Adaptability or versatility
If conventional electrode design is used, then wide viewing angle is achieved, but lateral visibility deteriorates
Solution Approach 1:
Different regions of the pixel are equipped with sub-pixel electrodes having different orientations optimized for specific viewing directions. The first sub-pixel electrode is optimized for one lateral direction, the second for another direction, and the third for a third direction, providing locally optimized quality for each viewing zone while achieving overall wide viewing angle and good lateral visibility.
3Ease of manufacture
If simple electrode pattern is used, then manufacturing is easy, but textures occur
Solution Approach 1:
The sub-pixel electrodes are designed with curved or angled orientations rather than simple straight lines parallel to gate lines. The first sub-pixel electrode forms a first angle, the second sub-pixel electrode forms a second angle, and the third sub-pixel electrode forms a third angle with the gate lines, creating curved electric field distributions that prevent texture formation while remaining manufacturable through standard photolithography processes.
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 enhances the response speed and luminance of the LCD while preventing textures and improving lateral visibility, maintaining high contrast ratios and wide viewing angles.
Implementation Method 1
a connecting portion connecting the lateral electrode with each of the upper and lower electrodes, at least a portion of the connecting portion forming an angle of substantially 45 degrees or −45 degrees with respect to the gate lines
Implementation Method 2
micro-patterns formed at its edges, the micro-patterns strengthening a lateral electric field
Implementation Method 3
a vertical alignment mode liquid crystal layer interposed between the electrodes. Voltages applied to the two plates, control the transmittance of incident light by rearranging the liquid crystal molecules of the liquid crystal layer
Data Source
AI summary
A liquid crystal display having improved response speed and greater luminance includes an intersecting array of gate lines and data lines defining a matrix of pixels, a first sub-pixel electrode connected to a first thin film transistor; a second sub-pixel electrode connected to a second thin film transistor, the second sub-pixel electrode including a pair of upper and lower electrodes disposed above and below the first sub-pixel electrode and lateral electrode disposed at one side of the first sub-pixel electrode and the upper and lower electrodes; and a connecting portion connecting the lateral electrode with each of the upper and lower electrodes, at least a portion of the connecting portion forming an angle of substantially 45 degrees or −45 degrees with respect to the gate lines.