Liquid Crystal Display Electrode Configuration for Brightness
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Solution Overview
Problem
Existing liquid crystal display devices, such as IPS and FFS modes, face challenges in twisting liquid crystal molecules effectively with current electric field strengths, leading to reduced brightness and display quality.
Innovation Solution
A liquid crystal display device design featuring first and second substrates with a liquid crystal layer, where first and second electrodes have linear portions forming adjacent gaps, and a third electrode with overlapping linear portions on the second substrate, generating electric fields in different directions to enhance liquid crystal molecule movement without increasing driving voltage, and using transparent conductive materials to maintain brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional IPS or FFS mode liquid crystal display devices use current electric field strengths to twist liquid crystal molecules, then the display can operate with existing driving voltages, but the brightness and display quality are reduced
Solution Approach 1:
The patent introduces a third electrode on the color filter substrate that overlaps with the pixel electrode and counter electrode in plan view, creating a vertical electric field component in addition to the horizontal electric field. This multi-dimensional electric field configuration enhances liquid crystal molecule twisting effectiveness without increasing driving voltage, thereby improving brightness and display quality.
Solution Approach 2:
The patent divides the electrode system into three separate electrodes (pixel electrode, counter electrode, and third electrode) instead of using the conventional two-electrode system. This segmentation allows independent control of electric field directions and strengths, enabling enhanced liquid crystal manipulation through combined horizontal and vertical field components.
2Illumination intensity
If the driving voltage is increased to improve liquid crystal molecule twisting, then the brightness and display quality improve, but the power consumption increases
Solution Approach 1:
By adding the vertical electric field component from the third electrode, the patent achieves enhanced liquid crystal twisting effectiveness without increasing the magnitude of the driving voltage. The combined horizontal and vertical field components work synergistically to improve molecule alignment efficiency, reducing power consumption while maintaining brightness.
Solution Approach 2:
The patent changes the electric field direction parameters by introducing a vertical component through the third electrode, rather than increasing the voltage magnitude. This parameter change in field orientation improves twisting effectiveness and brightness while maintaining the same power consumption level.
3Illumination intensity
If transparent conductive materials are used in electrodes, then the brightness is maintained, but the electrode pattern precision and alignment become more critical
Solution Approach 1:
The third electrode is positioned on the color filter substrate to overlap with the pixel electrode and counter electrode in plan view, creating a vertical electric field component. This spatial arrangement in the vertical dimension provides manufacturing tolerance, as the overlapping configuration is less sensitive to lateral alignment errors compared to edge-to-edge configurations.
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
The configuration improves brightness and reduces driving voltage, minimizing flicker and burn-in phenomena while maintaining high numerical aperture and display quality.
Implementation Method 1
electric fields of different directions are generated between the first electrode and the second electrode and between the first electrode and the third electrode
Implementation Method 2
the liquid crystal aligned in a horizontal direction turns in the horizontal direction such that the transmission amount of light incident from a backlight can be controlled
Data Source
AI summary
A liquid crystal display device including a plurality of sub pixel regions is provided. The device includes first and second substrates with a liquid crystal layer interposed therebetween; a first electrode formed on the liquid crystal layer side of the first substrate; a second electrode formed nearer the liquid crystal layer side than the first electrode with an insulating film interposed therebetween and having a plurality of linear portions in a region overlapping with the first electrode in plan view, a third electrode having a plurality of linear portions formed on the liquid crystal layer side of the second substrate, the linear portions of the third electrode not overlapping with the linear portions of the second electrode in plan view and have portions formed along the linear portions of the second electrode, and wherein the electric fields are generated between the second electrode and the third electrode and between the second electrode and the first electrode.