Display Apparatus Shielding Electrode Transmittance
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Solution Overview
Problem
Liquid crystal display devices in vertically aligned mode face a reduction in transmittance due to the requirement of a large number of transistors and capacitors when using techniques like the charge share (CS) method or resistivity division (RD) method, which compromises display quality.
Innovation Solution
The display apparatus incorporates a first substrate with specific electrode configurations, including gate lines, data lines, switching elements, pixel electrodes, and capacitor electrodes, along with insulation layers and contact holes, to optimize the alignment of liquid crystal molecules and improve transmittance and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If charge share (CS) method or resistivity division (RD) method is employed to improve viewing angle characteristic, then viewing angle is improved, but transmittance is reduced due to large number of transistors and capacitors required
Solution Approach 1:
The patent combines the CS method and RD method into a hybrid approach where a shielding electrode is used to divide the pixel into multiple domains. This merging allows the patent to achieve the viewing angle improvement of both methods while reducing the number of transistors and capacitors needed, thereby maintaining higher transmittance.
Solution Approach 2:
The patent introduces a shielding electrode as an intermediary element that acts as a domain division structure. This shielding electrode, controlled by a domain control electrode, serves as a mediator to achieve domain division and viewing angle improvement without requiring the extensive transistor and capacitor networks of traditional CS or RD methods.
2Adaptability or versatility
If domain division techniques are used to improve viewing angle, then viewing angle is improved, but device complexity increases due to additional transistors and capacitors
Solution Approach 1:
The patent merges the functionality of multiple domain control electrodes into a single shielding electrode structure. By controlling the shielding electrode through a domain control electrode, the patent achieves domain division with fewer components, reducing device complexity while maintaining viewing angle performance.
Solution Approach 2:
The shielding electrode serves multiple functions: it acts as a domain division structure, a capacitance element, and a control element for liquid crystal alignment. This multi-functionality reduces the need for separate transistors and capacitors, thereby reducing device complexity.
3Manufacturing precision
If multiple capacitor electrodes are added to control liquid crystal alignment, then display quality is improved, but device complexity increases
Solution Approach 1:
The first and second capacitor electrodes are designed to serve dual purposes: they provide capacitance for liquid crystal alignment control and simultaneously function as domain control structures. This multi-functionality improves liquid crystal alignment control while avoiding the need for additional dedicated capacitor components, thus reducing device complexity.
Solution Approach 2:
The patent extends capacitor electrodes in different spatial dimensions (first capacitor electrode extended in first direction, second capacitor electrode extended in second direction) to achieve comprehensive liquid crystal alignment control. This dimensional approach allows effective control without increasing the number of electrode layers or components.
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 transmittance and display quality by efficiently controlling the alignment of liquid crystal molecules, reducing the need for excessive transistors and capacitors, thereby maintaining high contrast ratios and wide viewing angles.
Implementation Method 1
a liquid crystal layer disposed between the first substrate and the second substrate
Implementation Method 2
The liquid crystal display device supplies a voltage to an electric field generating electrode to apply an electric field to the liquid crystal layer
Implementation Method 3
a first capacitor electrode extended from the output electrode and overlapping the pixel electrode and the storage electrode, and a second capacitor electrode disposed spaced apart from the first capacitor electrode and overlapping the extension portion of the shielding electrode and the storage electrode
Data Source
AI summary
Provided is a display apparatus including a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes a gate line, a data line, a storage electrode, and a switching element. The switching element is connected to a data line and a gate line. The first substrate further includes a pixel electrode, a shielding electrode, and first and second capacitor electrodes. The pixel electrode is connected to an output electrode of the switching element, and the shielding electrode includes a line portion disposed along the data line and an extension portion extended from the line portion. The first capacitor electrode is extended from the output electrode and overlaps the pixel electrode and the storage electrode. The second capacitor electrode is disposed spaced apart from the first capacitor electrode and overlaps the extension portion electrode the shielding electrode and the storage electrode.