Curved LCD Panel Heating Line for Refractive Index Compensation
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Solution Overview
Problem
Large-scale liquid crystal display (LCD) screens exhibit increased viewing angle differences and glare, leading to display defects like yellowish images due to curvature stress, especially when the screen is curved to correct viewing angle issues.
Innovation Solution
A curved liquid crystal display panel with a heating line disposed on at least one of the substrates to increase the temperature of the liquid crystal layer, reducing the refractive index difference and preventing yellowish color defects by enhancing the response speed of liquid crystal molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the screen is curved into a concave shape to correct viewing angle differences, then viewing angle uniformity is improved, but yellowish color defects occur due to curvature stress
Solution Approach 1:
The patent applies temperature as a parameter to change the optical properties of the liquid crystal layer. By heating the liquid crystal layer through heating lines, the refractive index difference is reduced, which compensates for the yellowish color defects caused by curvature stress. This parameter change (temperature) directly addresses the harmful effect while maintaining the curved screen's viewing angle benefits.
Solution Approach 2:
The patent converts the harmful curvature stress that causes yellowish defects into a beneficial effect by using the same curved structure in conjunction with thermal compensation. The heating lines exploit the temperature-dependent optical properties of liquid crystals to counteract the stress-induced refractive index changes, turning the inherent stress problem into a controllable parameter for optimization.
2Object-affected harmful factors
If the liquid crystal layer temperature is increased to reduce refractive index difference, then yellowish color defects are prevented, but energy consumption increases
Solution Approach 1:
Instead of heating the entire liquid crystal layer uniformly, the patent applies heating locally through heating lines positioned at specific locations within the display panel. This local heating approach reduces the total energy required compared to uniform heating, while still achieving sufficient temperature increase to reduce the refractive index difference and prevent yellowish color defects in the critical areas.
Solution Approach 2:
The patent applies heating to the liquid crystal layer to a degree that is sufficient to compensate for curvature stress effects, rather than maintaining excessive temperature. The heating lines are designed to provide just enough thermal energy to reduce the refractive index difference to acceptable levels, avoiding unnecessary energy consumption while still preventing yellowish defects.
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 effectively prevents yellowish color defects and improves display characteristics by increasing the temperature of the liquid crystal layer, thereby reducing refractive index differences and enhancing the response speed of liquid crystal molecules.
Implementation Method 1
a heating line disposed on at least one of the upper substrate and the lower substrate
Implementation Method 2
the heating line may increase the temperature of the liquid crystal layer such that a refractive index difference of the liquid crystal layer may be decreased
Data Source
AI summary
A curved liquid crystal display panel includes an upper substrate having a curved shape, a liquid crystal layer, a lower substrate having a curved shape, where the lower substrate is combined with the upper substrate and the liquid crystal layer is disposed between the upper substrate and the lower substrate, and a heating line disposed on at least one of the upper substrate and the lower substrate and which provides heat to the liquid crystal layer such that a temperature of the liquid crystal layer increases.