LCD Heating Lines Segmentation for Low-Temperature Performance
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Solution Overview
Problem
Liquid crystal display devices face challenges in maintaining image quality and response characteristics at low temperatures due to the degradation of liquid crystal materials and the difficulty in generating sufficient heat with existing heating conductive line arrangements, which can result in image spots and inconsistent display.
Innovation Solution
The arrangement of heating conductive lines is modified to create a mesh pattern with disconnected and connected segments between pixel regions, increasing total resistance and generating more heat while minimizing parasitic capacitance differences between pixel regions, thus preventing image spots and improving response characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heating conductive lines are arranged in a mesh pattern around each pixel region, then the liquid crystal can be heated effectively, but the total resistance decreases and heat generation becomes insufficient
Solution Approach 1:
The heating conductive lines are segmented into disconnected segments between pixel regions rather than forming a continuous mesh. This segmentation increases the total resistance of the heating lines, thereby increasing heat generation capability while still providing effective heating to the liquid crystal through the disconnected segments distributed across multiple pixel regions.
2Temperature
If heating conductive lines are arranged in a mesh pattern, then heating coverage is improved, but parasitic capacitance differences cause image spots
Solution Approach 1:
By segmenting the heating conductive lines into disconnected segments between pixel regions, the patent reduces parasitic capacitance differences that would otherwise cause image spots. The segmentation breaks up continuous capacitive coupling while maintaining distributed heating coverage through the network of segments across different pixel regions.
Solution Approach 2:
The heating conductive lines are configured with different connection states (connected or disconnected) in different locations between pixel regions. This local variation in quality optimizes both heating effectiveness and parasitic capacitance management, allowing some regions to provide stronger heating while others minimize capacitive coupling to prevent image spots.
3Power
If heating conductive lines are made longer to increase resistance, then heat generation improves, but the complexity of the arrangement increases
Solution Approach 1:
The heating conductive lines are divided into multiple disconnected segments distributed across pixel regions rather than using fewer longer continuous lines. This segmentation achieves increased total resistance and improved heat generation while maintaining a regular, systematic arrangement pattern that reduces implementation complexity compared to arbitrary long-line configurations.
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 configuration allows for rapid temperature increase of the liquid crystal, maintaining consistent image quality across varying ambient temperatures by generating more heat and reducing parasitic capacitance-induced image spots, resulting in improved display performance.
Implementation Method 1
heating conductive lines 3 for controlling the temperature of the liquid crystal... a voltage is applied to the heating conductive lines 3. The applied voltage causes the heating conductive lines 3 to generate heat
Data Source
AI summary
A liquid crystal display device is disclosed. The disclosed device includes a first substrate including a plurality of gate and data lines defining a plurality of pixel regions, heating conductive lines having first conductive lines formed substantially in parallel with the gate lines and second conductive lines formed substantially in parallel with the data lines, thin film transistors (TFT) connected to the corresponding gate lines and data lines, and pixel electrodes connected to the corresponding TFTs. The disclosed device also includes a second substrate including a plurality of color filters formed corresponding to the pixel regions, and a liquid crystal layer between the first substrate and the second substrate. At least one of the second conductive lines is separated from at least one of the first conductive lines.