Pixel Electrode Segmentation for Wide Viewing Angle LCDs
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Solution Overview
Problem
Liquid crystal displays have a relatively narrow viewing angle, making it difficult to improve side visibility, especially when attempting to drive them in a dot inversion manner due to the need for different voltages applied to sub-pixels with varying areas.
Innovation Solution
The display apparatus includes a first and second substrate with a liquid crystal layer and a plurality of pixels, each comprising specific capacitors and switching devices, allowing for adjustable data voltages and area ratios of pixel electrodes to enhance viewing angles and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If one pixel is divided into two sub-pixels with different areas to improve viewing angle, then the viewing angle is improved, but the pixel structure becomes complex and dot inversion driving becomes difficult
Solution Approach 1:
The pixel electrode is divided into two distinct regions with different area ratios (first region and second region), allowing different voltage applications to different segments. This segmentation enables improved viewing angle while maintaining a relatively simple overall pixel structure compared to fully complex sub-pixel divisions.
Solution Approach 2:
Different voltage levels are applied to different regions of the pixel electrode based on their specific area ratios and positions. The first region receives a first voltage and the second region receives a second voltage, allowing localized optimization of light transmission properties to improve viewing angle without requiring complete structural complexity throughout the entire display.
2Illumination intensity
If different voltages are applied to sub-pixels with different areas to improve viewing angle, then the viewing angle is improved, but the driving complexity increases
Solution Approach 1:
The pixel electrode serves multiple functions by being divided into regions with different area ratios that can receive different voltages. This multi-functional design allows the same electrode structure to achieve both normal viewing and improved side viewing characteristics, reducing the need for entirely separate driving circuits for different viewing modes.
Solution Approach 2:
The display can dynamically adjust which voltage is applied to which region of the pixel electrode based on the desired gray scale and viewing conditions. This dynamic voltage allocation allows flexible control over viewing angle and image quality without requiring complex static structural modifications.
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 improves the viewing angle and display quality by allowing for high and low gray-scale voltage adjustments and area ratios, enabling wider viewing angles and better image display.
Implementation Method 1
a liquid crystal display includes a display panel that receives light to display an image and a backlight unit that provides the light to the display panel. The liquid crystal display displays the image using a variation of light transmission of liquid crystals
Implementation Method 2
The first liquid crystal capacitor is connected to the first switching device and includes the liquid crystal layer as a dielectric substance. The second liquid crystal capacitor is connected to the second switching device and includes the liquid crystal layer as a dielectric substance
Data Source
AI summary
A display apparatus includes a plurality of pixels. At least one of the pixels includes a gate line, a data line, a first storage line spaced apart from the gate line, a second storage line spaced apart from the gate line and the first storage line, first and second switching devices electrically connected to the gate line and the data line, a first liquid crystal capacitor connected to the first switching device and including the liquid crystal layer as its dielectric substance, a second liquid crystal capacitor connected to the second switching device and including the liquid crystal layer as its dielectric substance, a first storage capacitor connected between the first switching device and one of the first and second storage lines, and a second storage capacitor connected between the second switching device and a remaining one of the first and second storage lines.