IPS LCD Heater Line Light Leakage Prevention
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Solution Overview
Problem
Conventional IPS mode LCD devices face challenges in maintaining normal display characteristics under low temperature conditions due to the sensitivity of liquid crystals to temperature, leading to abnormal orientation and light leakage issues when a heater line is used to secure reliability.
Innovation Solution
An IPS mode LCD device with a heater line vertically interposed between electrodes, preventing light leakage by shielding the electric flux generated around the heater line, either by positioning it over or beneath the common electrode or sandwiching it between common electrodes, ensuring normal operation even at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heater line is used to maintain reliability under low temperature conditions, then the display device can operate reliably at low temperatures, but light leakage occurs due to abnormal orientation of liquid crystals around the heater line
Solution Approach 1:
A black matrix layer is introduced as an intermediary element between the heater line and the liquid crystal layer. This black matrix layer absorbs light and prevents the abnormal orientation of liquid crystals caused by electric flux from the heater line, thereby eliminating light leakage while preserving the heater line's function for maintaining reliability under low temperature conditions.
2Manufacturing precision
If the heater line is positioned to prevent light leakage, then display quality is maintained, but the heating efficiency may be reduced
Solution Approach 1:
The black matrix layer is positioned selectively only in regions where light leakage occurs around the heater line, rather than covering the entire display area. This localized approach prevents light leakage in critical areas while minimizing the impact on heating efficiency by leaving the heater line's active heating regions uncovered.
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 light leakage and maintains normal display characteristics by pre-heating the liquid crystal panel using the heater line, ensuring reliable operation under low temperature conditions without degrading the LCD device's quality.
Implementation Method 1
a heater line to achieve an improvement in reliability under low temperature conditions
Implementation Method 2
The driving principle of the above-mentioned general LCD utilizes optical anisotropy and polarization of the liquid crystal
Implementation Method 3
The driving principle of the above-mentioned general LCD utilizes optical anisotropy and polarization of the liquid crystal
Implementation Method 4
a pixel electrode and a common electrode are formed on a first substrate at each pixel region of the first substrate such that the pixel electrode and common electrode extend parallel to each other while being horizontally spaced apart from each other to generate an in-plane electric field (horizontal field)
Data Source
AI summary
An in-plane switching (IPS) mode liquid crystal display (LCD) device is disclosed which includes a heater line to achieve an improvement in reliability under low temperature conditions. The LCD device includes a first substrate and a second substrate which face each other, a gate line and a data line which are formed on the first substrate such that the gate line and the data line cross each other to define a pixel region, a common electrode and a pixel electrode which are formed on the first substrate in the pixel region, a heater line formed on the first substrate such that the heater line corresponds to the common electrode adjacent to one side of the data line, and a liquid crystal layer formed between the first substrate and the second substrate.