Optical Panel Voltage Compensation for Gravity-Biased Cell Thickness
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Solution Overview
Problem
Existing optical panels with liquid crystal or electrophoretic media exhibit non-uniform cell thickness due to gravitational bias, leading to display inconsistencies when installed perpendicular to a ground surface.
Innovation Solution
The optical panel is designed with a variable region bisected into upper and lower regions, where a higher voltage is applied to the lower region to counteract gravitational effects, ensuring consistent optical characteristics by adjusting the voltage distribution across the liquid crystal or electrophoretic medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical panel is installed perpendicular to a ground surface, then the display can be viewed from multiple angles, but the liquid crystal or electrophoretic medium becomes biased by gravity causing non-uniform cell thickness
Solution Approach 1:
The patent applies different voltage levels to different regions of the liquid crystal or electrophoretic medium. Specifically, a higher voltage is applied to the lower region (vertically downward side) compared to the upper region, creating local quality differences in voltage distribution to compensate for gravitational bias and achieve uniform optical characteristics across the panel.
2Manufacturing precision
If a higher voltage is applied to the lower region to compensate for gravitational bias, then cell thickness uniformity improves, but the voltage distribution becomes more complex
Solution Approach 1:
The patent divides the liquid crystal or electrophoretic medium into multiple regions (upper region and lower region) and applies different voltage levels to each region. This segmentation allows independent voltage control for each region, simplifying the overall voltage distribution management while achieving uniform cell thickness.
3Adaptability or versatility
If the cell thickness is made non-uniform to accommodate gravitational bias, then the panel can be installed vertically, but display inconsistencies occur
Solution Approach 1:
The patent changes the voltage parameter across different regions of the liquid crystal or electrophoretic medium. By applying a higher voltage to the lower region compared to the upper region, the system compensates for gravitational effects and maintains display consistency while allowing vertical installation orientation.
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 design effectively suppresses focal distance and retardation inconsistencies, enhancing the quality of three-dimensional image display and response times in optical panels.
Implementation Method 1
a liquid crystal or an electrophoretic medium including a light-transmitting dispersion medium and electrophoretic particles
Implementation Method 2
an electrophoretic medium including a light-transmitting dispersion medium and electrophoretic particles
Implementation Method 3
the liquid crystal is biased to a vertically downward side in the liquid crystal display panel due to gravity
Data Source
AI summary
An optical panel includes a first light-transmitting substrate, a second light-transmitting substrate, and a liquid crystal or an electrophoretic medium sandwiched by the first light-transmitting substrate and the second light-transmitting substrate. The optical panel is installed with a front surface including a variable region inclined with respect to the ground surface. When applying voltage to a liquid crystal or an electrophoretic medium to set the variable region to one of two states, a voltage, higher than the voltage applied to the liquid crystal or the electrophoretic medium of an upper region positioned vertically upward in the variable region, is applied to the liquid crystal or the electrophoretic medium of at least a partial region of a lower region positioned vertically downward in the variable region.