Liquid Crystal Display Panel with Tapered Cell Gap for Vertical Orientation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display panels exhibit chromaticity variations when used in a vertical orientation due to gravity-induced flow of liquid crystals, causing differences in cell gap and image color between upper and lower parts, which is exacerbated in double-panel configurations.
Innovation Solution
A liquid crystal display panel design with a varying cell gap between substrates, achieved by using spacers of different heights and placement ratios, which decreases from top to bottom when in a horizontal orientation, ensuring a uniform cell gap when upright, thereby minimizing chromaticity variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a liquid crystal display panel is used in a vertical orientation, then the display can be placed in a vertical orientation with the display screen in the landscape orientation, but the liquid crystal flows down in the vertical direction by gravity causing chromaticity variation between upper and lower parts
Solution Approach 1:
The patent applies local quality by making the cell gap non-uniform in the vertical direction, with the fourth cell gap (lower part) being smaller than the first cell gap (upper part). This local variation in cell gap size compensates for the liquid crystal flow caused by gravity, maintaining chromaticity uniformity across the display when used in vertical orientation.
Solution Approach 2:
The patent implements preliminary anti-action by pre-configuring a smaller cell gap in the lower part of the display before use. This preliminary adjustment counteracts the gravitational flow of liquid crystal that would otherwise cause chromaticity variation, preventing the problem before it occurs during vertical operation.
2Manufacturing precision
If spacers of different heights are used to create varying cell gap, then chromaticity variation is reduced, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the spacer configuration into different height zones. Specifically, it uses a first spacer height for the upper part and a second spacer height (smaller) for the lower part, with intermediate spacers transitioning between these zones. This segmented approach achieves the required cell gap variation while maintaining manufacturability.
Solution Approach 2:
The patent implements parameter changes by varying the spacer height parameter across different vertical zones of the display. The spacer height is changed from the first height in the upper region to the second height in the lower region, creating the necessary cell gap gradient to compensate for gravitational effects on liquid crystal.
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
Prevents chromaticity variations in images displayed on liquid crystal display panels when used vertically by maintaining a uniform cell gap, reducing color differences between upper and lower parts and addressing the issue in both single and double-panel configurations.
Implementation Method 1
the liquid crystal of the liquid crystal layer in the liquid crystal display panel flows down in the vertical direction by gravity
Data Source
AI summary
A liquid crystal display panel to be used in a vertical orientation includes: a first substrate; a second substrate located opposite to the first substrate; and a liquid crystal layer disposed between the first substrate and the second substrate. When a position of a top end of the liquid crystal layer is defined as a first position and a position of a bottom end of the liquid crystal layer is defined as a second position when the liquid crystal display panel is placed in the vertical orientation, a distance between the first substrate and the second substrate when the liquid crystal panel is in a horizontal orientation gradually decreases from the first position to the second position.