Liquid Crystal Display Panel Spacer Positioning
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Solution Overview
Problem
Conventional liquid crystal display panels with columnar spacers face issues with impact resistance and display quality due to the fragility of inorganic electrodes and inability to absorb volume variations, leading to potential damage and bubble formation, especially at low temperatures.
Innovation Solution
The implementation of a liquid crystal display panel design where columnar spacers are positioned away from pixel and common electrodes, overlapping through-holes and light blocking portions, allowing for a gap maintenance between substrates using elastic materials, thereby enhancing impact resistance and volume variation absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If columnar spacer overlaps pixel electrode and common electrode, then gap holding function is improved, but impact resistance deteriorates due to fragility of inorganic electrodes
Solution Approach 1:
The patent extracts the columnar spacer from the region overlapping with pixel electrodes and common electrodes. By positioning the spacer in a region free of these fragile inorganic electrodes, the design eliminates the risk of spacer placement compromising electrode integrity while maintaining effective gap holding through alternative spacer positioning strategies
Solution Approach 2:
The patent introduces a resin layer as an intermediary element between the columnar spacer and the fragile inorganic electrodes. This resin layer acts as a cushioning medium that absorbs impact forces, preventing direct transmission of stress to the electrodes while allowing the spacer to maintain its gap-holding function
2Manufacturing precision
If columnar spacer overlaps pixel electrode and common electrode, then gap holding function is improved, but reliability deteriorates due to electrode damage risk
Solution Approach 1:
The patent removes the columnar spacer from overlapping with pixel electrodes and common electrodes by repositioning it in a safe zone. This extraction eliminates the potential for mechanical damage to the electrodes during assembly or operation, thereby maintaining electrode integrity while achieving gap uniformity through alternative spacer placement
Solution Approach 2:
The patent applies beforehand cushioning by introducing a resin layer that provides protective cushioning between the columnar spacer and the fragile inorganic electrodes. This cushioning layer is positioned in advance to prevent potential damage from impact or thermal stress, ensuring electrode reliability
3Manufacturing precision
If conventional spacer material is used, then gap holding function is achieved, but adaptability to temperature variation deteriorates
Solution Approach 1:
The patent changes the material parameter of the columnar spacer from traditional rigid materials to elastic materials. This parameter change enables the spacer to dynamically adapt its physical properties in response to temperature variations, allowing it to expand or contract while maintaining constant gap pressure and preventing bubble formation
Solution Approach 2:
The patent introduces dynamics into the spacer system by using elastic materials that can dynamically adjust their shape and volume in response to environmental changes. This dynamic behavior allows the spacer to maintain effective gap holding across varying temperature conditions, improving thermal adaptability
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 improves the display quality by preventing electrode damage and bubble formation, ensuring stable image display under external impacts and temperature variations, while maintaining the gap between substrates effectively.
Implementation Method 1
columnar spacer formed on either one of the array substrate and the opposite substrate and positioned away from the pixel electrode, the columnar spacer overlapping the through-hole and holding the gap between the array substrate and the opposite substrate
Data Source
AI summary
A liquid crystal display panel includes an array substrate including a scanning line, a signal line crossing the scanning line, a switching element electrically connected to the scanning line and the signal line, and a pixel electrode formed on the scanning line, the signal line, and the switching element and electrically connected to the switching element, an opposite substrate including a common electrode with a through-hole and arranged opposite to the array substrate with a gap, a columnar spacer formed on either one of the array substrate and the opposite substrate and positioned away from the pixel electrode, the columnar spacer overlapping the through-hole and holding the gap between the array substrate and the opposite substrate, and a liquid crystal layer sandwiched between the array substrate and the opposite substrate.