Curved Display Ultraviolet Filter Thickness Compensation
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Solution Overview
Problem
Display apparatuses with curved surfaces face challenges in maintaining uniform response time and reliability of liquid crystal layers due to varying cell gaps and pre-tilt angles, leading to inconsistent image display and potential afterimages.
Innovation Solution
A display apparatus with a curved surface is designed to have varying cell gaps and pre-tilt angles of liquid crystal molecules, controlled by an ultraviolet filter with thickness inversely proportional to the cell gaps, to ensure consistent response time across different areas of the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the display apparatus has a curved surface, then the display shape is improved, but the cell gap varies across different areas causing non-uniform response time
Solution Approach 1:
The patent applies local quality by making the ultraviolet filter thickness vary across different areas of the display panel. The filter thickness is designed to be greater in regions with smaller cell gaps and smaller in regions with larger cell gaps, creating localized compensation for cell gap variations. This spatially varying filter thickness ensures that pre-tilt angles are adjusted locally to compensate for regional cell gap differences, achieving uniform response time across the curved display surface.
Solution Approach 2:
The patent changes the physical parameter of the ultraviolet filter (its thickness) to compensate for cell gap variations. By controlling the filter thickness to be inversely proportional to the cell gap in each region, the pre-tilt angle of liquid crystal molecules is adjusted accordingly. This parameter change in the filter thickness enables compensation for the varying cell gaps caused by the curved surface, achieving uniform response time across the display.
2Adaptability or versatility
If the cell gap varies across different areas, then the curved surface is accommodated, but the pre-tilt angle becomes inconsistent leading to afterimages
Solution Approach 1:
The patent applies local quality by making the ultraviolet filter thickness vary across different areas of the display panel. The filter thickness is designed to be greater in regions with smaller cell gaps and smaller in regions with larger cell gaps, creating localized compensation for cell gap variations. This spatially varying filter thickness ensures that pre-tilt angles are adjusted locally to compensate for regional cell gap differences, achieving uniform response time across the curved display surface.
Solution Approach 2:
The patent applies preliminary anti-action by pre-compensating for cell gap variations before the liquid crystal molecules are activated. The ultraviolet filter is designed in advance with varying thickness to create corresponding pre-tilt angle variations that oppose the unwanted effects of cell gap variations. This preliminary compensation prevents afterimages and image inconsistency from occurring in the first place, rather than correcting them after they appear.
3Manufacturing precision
If the ultraviolet filter thickness is increased to compensate for smaller cell gaps, then pre-tilt angle is adjusted, but the filter becomes more complex
Solution Approach 1:
The patent applies local quality by making the ultraviolet filter thickness vary across different areas of the display panel. The filter thickness is designed to be greater in regions with smaller cell gaps and smaller in regions with larger cell gaps, creating localized compensation for cell gap variations. This spatially varying filter thickness ensures that pre-tilt angles are adjusted locally to compensate for regional cell gap differences, achieving uniform response time across the curved display surface.
Solution Approach 2:
The patent applies segmentation by dividing the ultraviolet filter into multiple regions with different thicknesses corresponding to different cell gap regions. The filter is segmented into a first region with greater thickness for areas with smaller cell gaps and a second region with smaller thickness for areas with larger cell gaps. This segmentation allows independent optimization of pre-tilt angle compensation in each region while maintaining a relatively simple overall filter structure.
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 improves the uniformity and reliability of the liquid crystal layer by adjusting pre-tilt angles and response times to compensate for cell gap differences, resulting in stable and normal image display.
Implementation Method 1
irradiating an ultraviolet ray onto the flat display panel through the ultraviolet filter to pre-tilt liquid crystal molecules of the LCD at a predetermined angle
Data Source
AI summary
A display apparatus includes a display panel which has a curved surface in a first direction and a flat surface in a second direction crossing the first direction, and includes, a first substrate, a second substrate which faces the first substrate, a liquid crystal layer which is disposed between the first and second substrates and includes liquid crystal molecules pre-tilted at predetermined angles with reference to a direction substantially vertical to a plane of the display panel, where the liquid crystal molecules are pre-tilted at the predetermined angles corresponding to cell gaps defined by distances between the first substrate and the second substrate, respectively.