Liquid Crystal Display Panel With Integrated Heating Electrode
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Solution Overview
Problem
Liquid crystal display devices used in military or on-vehicle applications face challenges in operating effectively at low temperatures due to increased viscosity and threshold voltage, leading to slow response times or crystallization, limiting their operational range.
Innovation Solution
A liquid crystal display panel design incorporating a heating electrode integrated within the substrate, which includes a plurality of strip heating electrodes arranged in a pseudo-dual-domain structure, allows for direct heating of the liquid crystal layer, enhancing the heating speed and maintaining optimal operating temperature, thus accelerating response times and ensuring display quality in low-temperature environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If liquid crystal display devices are used in low temperature environments, then the display device can operate in special conditions (military or on-vehicle applications), but the response speed becomes slow due to increased viscosity coefficient and threshold voltage of liquid crystal material
Solution Approach 1:
The patent applies preliminary action by integrating a heating electrode within the substrate that can be activated before or during low-temperature operation. The heating electrode pre-heats the liquid crystal layer to maintain it above the crystallization point, enabling the display device to operate normally in low temperature environments without waiting for external heating sources.
Solution Approach 2:
The heating electrode serves as an intermediary element between the substrate and the liquid crystal layer. It directly heats the liquid crystal material from within the device structure, mediating the temperature control to overcome the adverse effects of low ambient temperature on response speed while maintaining adaptability to special operating conditions.
2Adaptability or versatility
If liquid crystal display devices are used in low temperature environments, then the display device can operate in special conditions, but liquid crystal crystallization phenomenon occurs which prevents normal operation
Solution Approach 1:
The heating electrode is designed to activate in advance or simultaneously with device operation in cold environments, maintaining the liquid crystal temperature above the crystallization threshold. This preliminary thermal action prevents crystallization before it can occur, ensuring reliable operation across extended temperature ranges.
Solution Approach 2:
The heating electrode is integrated within the substrate structure itself, allowing the display device to self-regulate its temperature without requiring external heating systems. The device serves its own thermal needs through the integrated heating element, improving reliability by eliminating dependence on external temperature control mechanisms.
3Speed
If a heater line is added to the liquid crystal display device to improve low temperature operation, then the starting speed improves, but the device complexity increases
Solution Approach 1:
The heating electrode is merged with the substrate structure, combining the heating function with the existing structural component. This integration eliminates the need for separate external heater assemblies, reducing overall device complexity while maintaining improved starting speed in low temperature environments.
Solution Approach 2:
The substrate serves multiple functions: it provides structural support and simultaneously houses the heating electrode for temperature control. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure while enabling fast startup and reliable operation across temperature ranges.
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 integrated heating electrode significantly improves the starting speed and display quality of liquid crystal display devices by maintaining liquid crystal molecules at a suitable temperature, addressing the issue of slow response times at low temperatures and ensuring normal operation across a wider temperature range.
Implementation Method 1
a heating electrode 15 located at a side of the first underlay 101 facing towards the liquid crystal layer 30
Data Source
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Figure 3
Figure 4~5
AI summary
A liquid crystal display panel and a liquid crystal display device are provided. The liquid crystal display panel includes: a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate, in which a heating electrode is arranged on a side of the first substrate facing towards the liquid crystal layer. Heat generated by the heating electrode can directly act on liquid crystal molecules in the liquid crystal layer, so that the liquid crystal display panel can be quickly started and a response of the liquid crystal molecules in the liquid crystal layer can be accelerated in a low temperature environment, thereby guaranteeing the display quality of the liquid crystal display device in the low temperature environment.