Array Substrate Heating Line Layout for Low-Temperature LCD Operation
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Solution Overview
Problem
Liquid crystal display devices face operational issues at low temperatures due to increased viscosity of liquid crystal materials, leading to slowed response times and potential crystallization, which can render them non-functional in environments below -40°C.
Innovation Solution
The array substrate design includes heating line groups with shared conductive terminals, reducing the number of terminals needed and minimizing the length of the flip-chip film, while maintaining effective heating and reducing bending stress and light leakage risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each heating line is connected to separate conductive terminals, then the heating control precision is improved, but the number of conductive terminals increases, leading to increased cost and device complexity
Solution Approach 1:
Multiple heating lines that require the same voltage are merged into heating line groups that share common conductive terminals. Specifically, heating lines in the same group are electrically connected in parallel between a first common conductive terminal and a second common conductive terminal, reducing the total number of terminals needed while maintaining heating control capability.
Solution Approach 2:
The common conductive terminals serve multiple heating lines simultaneously, making the terminals multi-functional. Each terminal group can control heating across multiple lines, and the system can selectively activate different groups based on temperature requirements, achieving universal control functionality with fewer terminals.
2Device complexity
If the number of conductive terminals is reduced, then the cost and device complexity are reduced, but the heating control precision deteriorates
Solution Approach 1:
The heating lines are segmented into multiple groups based on their voltage requirements and spatial locations. Each group shares common terminals, but different groups can be independently controlled. This segmentation allows precise local heating control while using fewer terminals overall compared to individual line control.
Solution Approach 2:
Different regions of the display panel are assigned different heating line groups with specific voltage requirements. The system applies local quality control by activating specific groups based on local temperature needs, achieving precise thermal management without requiring individual terminals for every heating line.
3Area of stationary object
If heating lines extend across the entire display region, then the heating coverage is improved, but the length of crystalline film increases, leading to increased bending stress and light leakage risk
Solution Approach 1:
The heating lines are divided into multiple groups that are distributed across the display panel rather than forming single continuous long lines. Each group is a shorter segment connected between common terminals, achieving full coverage through multiple short segments instead of few long lines, thereby reducing bending stress and light leakage risk.
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 ensures the liquid crystal display devices can operate effectively across a wider temperature range, reducing the risk of light leakage and cost while maintaining efficient heating performance.
Implementation Method 1
a plurality of heating line groups, at least partially arranged in the display region, in which each of the plurality of heating line groups comprises a plurality of first heating lines arranged at intervals
Data Source
AI summary
An array substrate and a display panel are provided. The array substrate includes a display region and a first peripheral region surrounding the display region, the array substrate includes: a base substrate; gate lines, located on the base substrate and extending along a first direction; data lines, located on the base substrate and extending along a second direction, the second direction and the first direction cross each other; pixel electrodes, arranged in an array along the first direction and the second direction respectively; heating line groups, at least partially arranged in the display region, each of the heating line groups includes a plurality of first heating lines, and the first heating lines in each of the heating line groups are connected with each other through connection lines at two ends of the each of the heating line groups, respectively.