Liquid Crystal Display Panel Column Spacer Friction Reduction
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Solution Overview
Problem
Liquid crystal display panels experience accidental staining due to physical impact or vibration, which affects display quality as the column spacer becomes stuck, leading to increased friction and damage.
Innovation Solution
The implementation of a projection pattern portion and a projection support pattern on the gate lines of the liquid crystal display panel, formed on the same layer and material as the source and drain electrodes of the thin film transistor, to reduce friction and prevent the column spacer from being stuck during physical impact or vibration. The projection support pattern has a larger area than the pressed-down surface of the column spacer, with tail portions of 1.8 μm to 5 μm in length to effectively support the projection and prevent sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a projection is formed on the lower substrate to reduce friction area between the column spacer and the lower substrate, then the friction area is reduced and the column spacer can return to its original state, but under heavy physical impact or vibration, the projection and projection support pattern become stuck into the column spacer causing stain
Solution Approach 1:
The patent changes the geometric parameters of the projection support pattern by extending tail portions in the left/right directions. This modification increases the support area without significantly increasing the friction area, allowing the column spacer to return to its original state while preventing it from becoming stuck under heavy impact or vibration, thus preventing stain formation
Solution Approach 2:
The projection support pattern is segmented into a central projection region and extended tail portions. This segmentation allows the central region to provide the necessary friction reduction for the column spacer to return to its original state, while the extended tail portions distribute the impact force and prevent the column spacer from becoming stuck under heavy physical impact or vibration
Data Source
AI summary
A liquid crystal display panel includes a column spacer formed on an upper substrate, a thin film transistor formed on a lower substrate to face the upper substrate connected to a plurality of gate lines and a plurality of data lines, a pixel electrode formed at a pixel region provided as the gate line and the data line cross, the pixel electrode connected to the thin film transistor, and a projection pattern portion formed on the gate line matched to the pixel region to have a projection formed to be in contact with the column spacer for reducing a friction area between the column spacer and the lower substrate, and a projection support pattern for preventing the column spacer from being stuck in at the time of an physical impact or vibration.