Liquid Crystal Display Polymer Partition Walls for Disclination Control
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Solution Overview
Problem
In liquid crystal display devices, particularly in IPS and FFS modes, there is a limitation in increasing pixel electrode size to enhance transmittance due to the influence of liquid crystal orientation between adjacent pixels, and existing methods fail to sufficiently suppress disclination, which affects the display's contrast and viewing angle.
Innovation Solution
A liquid crystal display device with a polymer structure formed between the signal lines and pixel electrodes, where the polymer structure is created by polymerizing a monomer in the liquid crystal layer, overlapping with the black matrix and extending along the signal lines, to reduce the impact of liquid crystal orientation between pixels, thereby improving transmittance and suppressing disclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the size of the pixel electrode is increased to improve transmittance, then the transmittance is improved, but the liquid crystal orientation between adjacent pixels is influenced, causing display defects
Solution Approach 1:
The invention introduces a partition wall structure that segments the liquid crystal layer into isolated regions above and below the signal line. This segmentation prevents the liquid crystal orientation in one pixel from influencing adjacent pixels, allowing larger pixel electrode sizes to be used without causing orientation interference between pixels.
Solution Approach 2:
The partition wall acts as an intermediary structure between adjacent pixels, physically separating the liquid crystal regions and blocking the propagation of orientation influences. This mediator enables larger pixel electrodes while maintaining orientation stability by preventing direct interaction between adjacent pixel regions.
2Illumination intensity
If the pixel electrode size is increased to enhance transmittance, then the transmittance is improved, but disclination occurs affecting contrast and viewing angle
Solution Approach 1:
By segmenting the liquid crystal layer with partition walls, the invention creates isolated regions that prevent the formation and propagation of disclination defects. The segmentation confines any orientation disturbances within small localized areas, preventing them from affecting the overall display quality including contrast and viewing angle.
Solution Approach 2:
The partition wall structure provides beforehand cushioning by pre-establishing physical barriers that prevent disclination from forming and spreading. This preventive structure cushions against the harmful effects of disclination before they can degrade display performance.
3Reliability
If a polymer network is formed at the border portion of adjacent pixels to suppress orientation influence, then the orientation stability is improved, but the manufacturing complexity increases
Solution Approach 1:
The invention extracts the partition wall structure from the complex polymer network approach and implements it as a separate, simpler component formed by filling resin in grooves between pixel electrodes. This extraction simplifies the manufacturing process while achieving the same orientation stabilization effect.
Solution Approach 2:
The invention changes the manufacturing approach from forming a polymer network in situ to filling resin material into pre-formed grooves and curing it. This parameter change in the manufacturing process reduces complexity while achieving the desired partition wall structure for orientation stabilization.
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 solution achieves high transmittance and reduced disclination, enhancing the display's contrast and viewing angle performance, while maintaining production efficiency.
Implementation Method 1
a polymer structure formed in the liquid crystal layer; the polymer structure includes two polymer structures; the two polymer structures has the liquid crystal layer provided therebetween
Data Source
AI summary
Provided is a liquid crystal display device, including: a liquid crystal layer filled between a first and a second substrate; two polymer structures; and a plurality of pixels each including a first and a second electrode, one of the first and the second electrode being a pixel electrode, in which: each of the plurality of pixels is provided within a region surrounded by a signal line, a part of the signal line being formed between adjacent two of the plurality of pixels; each of the two polymer structures, which extends along the part of the signal line so as to sandwich the part of the signal line in plan view and is formed from one of the first and the second substrate toward another thereof, is formed so as to overlap with any of the region; and the two adjacent polymer structures has the liquid crystal layer provided therebetween.