Clamper Elastic Layer Prevents Panel Polarizer Damage
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Solution Overview
Problem
Conventional lighting fixtures damage the polarizer and glass of liquid crystal panels during clamping due to size mismatches, leading to reduced production yields.
Innovation Solution
A clamper with rotatable clamping portions featuring an elastic layer and a protruding elastic structure, which includes serrate, hemispherical, or cuboid strip patterns, is used to clamp substrates like thin-film-transistor and color filter substrates, preventing damage by providing buffering and ensuring the clamping force does not exceed the polarizer thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional lighting fixture is used to clamp the panel, then the panel can be fixed for lighting test, but the polarizer and glass of the panel are easily damaged from clamping
Solution Approach 1:
The patent changes the material parameter of the clamping portion by specifying an elastic layer with shore A hardness of 50-70, which is softer than conventional rigid materials. This parameter change allows the clamping portion to deform elastically during clamping, distributing the clamping force and preventing damage to the polarizer and glass, thereby resolving the contradiction between reliable panel fixation and prevention of clamping damage
Solution Approach 2:
The elastic layer acts as an intermediary between the clamping portion and the panel surface. This intermediary layer absorbs the mechanical stress through elastic deformation, preventing direct transmission of damaging forces to the polarizer and glass, thus protecting the panel components while maintaining effective clamping
2Area of stationary object
If the polarizer and panel have the same size or the polarizer is larger than the panel, then complete coverage is achieved, but the polarizer adjacent to TFT is damaged from clamping
Solution Approach 1:
The patent changes the hardness parameter of the clamping surface to shore A 50-70, creating a softer contact surface that can accommodate full polarizer coverage without concentrating excessive stress. This parameter change enables the clamping mechanism to handle larger polarizer areas while maintaining the structural integrity of the polarizer, especially in the vulnerable region adjacent to the TFT
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 elastic layer and rotatable clamping design prevent damage to the polarizer and glass by distributing force evenly and maintaining the polarizer's integrity during clamping, thereby enhancing production yields and reducing the risk of substrate damage.
Implementation Method 1
an elastic layer for contacting the substrate is disposed on each of the at least two rotatable clamping portions... the elastic layer has a shore A hardness of 50-70
Data Source
AI summary
The present invention provides a clamper and a lighting fixture. An elastic layer for contacting a panel is disposed on a rotatable clamping portion. In addition to that, a distance from a lowest point of one end of the panel clamped by the rotatable clamping portion to a carrier plate supporting a polarizer at one side of the panel adjacent to a thin film transistor is greater than a thickness of the polarizer. Accordingly, the present invention prevents the panel and the polarizer at one side of the panel adjacent to the thin film transistor from being damaged from clamping.