Multi-domain LCD Electric Field Distortion Slits Viewing Angle
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Solution Overview
Problem
Existing liquid crystal display (LCD) devices face issues with narrow viewing angles due to misalignment of substrates, which degrades viewing angle characteristics and display quality, and have limited aperture ratios due to the formation of electric field distortion units on both substrates.
Innovation Solution
A multi-domain LCD device is developed where electric field distortion units are formed only on the lower substrate, using electric field distortion slits and liquid crystal control electrodes to create symmetrical domains and enhance viewing angles, while minimizing the area of these units to maintain aperture ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electric field distortion units are formed on both substrates, then viewing angle characteristics can be improved, but substrate misalignment degrades viewing angle characteristics and display quality
Solution Approach 1:
The patent extracts the electric field distortion units from the upper substrate, forming them only on the lower substrate. This eliminates the misalignment issues between substrates while maintaining the viewing angle compensation function, as the distortion units are no longer subject to relative positioning errors with the upper substrate.
Solution Approach 2:
The patent merges the electric field distortion units with the lower substrate, combining their formation into a single manufacturing process. This integration ensures precise positioning and eliminates the need for separate alignment procedures between substrates, thereby preventing degradation from misalignment.
2Manufacturing precision
If electric field distortion units are formed on both substrates, then viewing angle can be widened, but aperture ratio is reduced
Solution Approach 1:
The patent removes the electric field distortion units from the upper substrate, concentrating all distortion units on the lower substrate. This reduces the total area occupied by distortion units and maximizes the aperture ratio, as fewer units are needed when they are strategically positioned only on the lower substrate.
Solution Approach 2:
The patent applies electric field distortion units selectively only where needed on the lower substrate, optimizing their placement to achieve maximum viewing angle compensation with minimal area occupation. This localized approach ensures high aperture ratio while maintaining effective viewing angle control.
3Adaptability or versatility
If multiple electric field distortion units are formed, then multi-domain structure is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple electric field distortion units into a single integrated structure on the lower substrate. This merging reduces the number of separate manufacturing steps and simplifies the fabrication process, while still achieving the desired multi-domain structure for viewing angle compensation.
Solution Approach 2:
The patent forms all electric field distortion units on the lower substrate during the initial substrate preparation phase, before assembling the upper substrate. This preliminary action simplifies subsequent manufacturing steps and reduces overall manufacturing complexity, as the distortion units are pre-positioned and require no additional alignment procedures.
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 approach prevents degradation of viewing angle characteristics due to substrate misalignment, widens the viewing angle, and enhances display quality by maintaining a high aperture ratio through optimized electric field distortion unit design.
Implementation Method 1
When the electric field is applied between the pixel electrode and the common electrode, liquid crystals rotate due to dielectric anisotropy to transmit or block light according to each unit pixel
Implementation Method 2
a structure such as a side-electrode or rib, or an electric field distortion slit is formed on a substrate to distort the electric field generated at the liquid crystal layer to position a director of liquid crystal molecules in a desired direction
Data Source
AI summary
A multi-domain LCD device includes first and second substrates, gate and data lines defining a plurality of pixel regions on the first substrate, at least one first electric field distortion unit formed at the pixel region, a pixel electrode formed at the pixel region and having at least one second electric field distortion unit, a common electrode formed on the second substrate, and a liquid crystal layer formed between the first and second substrates, having liquid crystal molecules symmetrically arranged by the first electric field distortion unit and having a plurality of domains generated by the first and second electric field distortion units.