Liquid Crystal Display Side Visibility via Shared Switching
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Solution Overview
Problem
Conventional liquid crystal displays face challenges in achieving high transmittance and visibility, particularly due to the complexity of subpixel configurations and voltage distribution, which can lead to increased manufacturing costs and low aperture ratios.
Innovation Solution
The proposed liquid crystal display configuration includes a first and second switching element, a first and second subpixel electrode, and a third switching element connected to a second gate line, with a transforming capacitor to create a voltage difference between liquid crystal capacitors, allowing for improved side visibility and transmittance by reducing parasitic capacitance and surface residual images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If different voltages are applied to two subpixels through different data lines to improve side visibility, then side visibility is improved, but manufacturing cost increases due to double data driving circuits
Solution Approach 1:
The patent merges the data driving function into a single data line that connects to both subpixels through a shared switching element, eliminating the need for separate data driving circuits for each subpixel. This reduces device complexity while maintaining the ability to apply different voltages to subpixels for improved side visibility.
Solution Approach 2:
The single data line serves multiple functions by connecting to both subpixels through the switching element, allowing the same data line to control different voltage levels for different subpixels. This multi-functional approach reduces the number of required data driving circuits while achieving the desired side visibility improvement.
2Device complexity
If the same data line is connected to two subpixels with a switching element and capacitor to reduce voltage of one subpixel, then device complexity is reduced, but transmittance decreases due to low aperture ratio
Solution Approach 1:
The patent applies local quality by making the switching element and capacitor configuration specific to certain subpixels rather than uniformly across all subpixels. This allows different voltage control mechanisms to be applied only where needed to improve side visibility, while maintaining higher aperture ratio and transmittance in other regions.
Solution Approach 2:
Instead of applying voltage reduction to all subpixels, the patent applies the switching element and capacitor configuration partially to specific subpixels. This partial action allows the system to achieve improved side visibility in critical areas while maintaining higher transmittance in other areas, avoiding the excessive action that would uniformly reduce aperture ratio.
3Stability of the object's composition
If vertically aligned liquid crystal mode is used to achieve large contrast ratio and wide viewing angle, then contrast ratio and viewing angle are improved, but side visibility remains limited
Solution Approach 1:
The patent introduces dynamic voltage control through switching elements and capacitors that can adjust the voltage applied to different subpixels in real-time. This dynamic adjustment allows the system to optimize the balance between maintaining the stable contrast ratio and viewing angle characteristics of vertically aligned mode while improving side visibility through localized voltage modulation.
Solution Approach 2:
The patent changes the voltage parameter dynamically by using switching elements and capacitors to adjust the voltage levels applied to different subpixels. This parameter change enables the system to maintain the stable optical properties of vertically aligned liquid crystal mode while improving side visibility through localized voltage optimization.
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 side visibility and transmittance by up to 5% compared to conventional methods, while preventing parasitic capacitance and surface residual images, thereby improving the overall performance of the liquid crystal display.
Implementation Method 1
LCDs display images by generating an electric field in the liquid crystal layer if voltage is applied to the field generating electrodes such that the liquid crystal molecules in the liquid crystal layer are aligned to control polarization of incident light
Implementation Method 2
a first transforming capacitor formed between the second switching element and the third subpixel electrode
Data Source
AI summary
Provided is a liquid crystal display to provide improved transmittance and visibility includes a first substrate; a first switching element and a second switching element formed on the first substrate configured to be switched by the same signal; a first subpixel electrode connected to the first switching element; a second subpixel electrode connected to the second switching element; a third switching element connected to the second switching element; a third subpixel electrode connected to the third switching element; a second substrate; a common electrode formed on the second substrate; and a liquid crystal layer formed between the first substrate and the second substrate.