LC Display Seal Hardening Furnace Rack Bar Stain Prevention
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Solution Overview
Problem
The existing seal hardening furnaces for liquid crystal display devices cause stains on the substrates due to the heavy weight of the panels, leading to defects during the high-temperature hardening process, as the rack bars exert pressure on the substrates.
Innovation Solution
The seal hardening furnace incorporates a cassette structure with rack bars and an air supply system to lift the substrates off the rack bars, and a secondary support mechanism that extends the contact area or uses folding rack bars to distribute the load uniformly, preventing direct contact and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rack bars are used to support substrates in the seal hardening furnace, then the substrates can be supported during the hardening process, but the heavy weight of the panels causes stains on the substrates due to pressure from the rack bars
Solution Approach 1:
A cushioning member is introduced as an intermediary element between the rack bar and the substrate. This cushioning member absorbs the pressure from the rack bar, preventing direct contact and the resulting stains on the substrate while maintaining support stability during the hardening process
Solution Approach 2:
The cushioning member is placed in advance on the rack bar before the substrate is positioned. This pre-positioned cushioning element prepares the support structure to mitigate pressure effects, ensuring that when the heavy substrate is placed, the pressure is already cushioned and cannot directly contact the substrate surface
2Strength
If the rack bars are made stronger to support heavy substrates, then the substrates can be supported without deformation, but the pressure on the substrates increases causing stains
Solution Approach 1:
The cushioning member serves as a mediator that allows the rack bar to maintain its structural strength while preventing the transmission of pressure to the substrate. The cushioning member absorbs and distributes the load, enabling strong support without harmful pressure contact
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 solution effectively mitigates stain generation on the liquid crystal display panels by ensuring even support and reducing pressure on the substrates during the hardening process, maintaining panel quality.
Implementation Method 1
an air supply unit for supplying air through the injecting passage
Data Source
AI summary
A seal hardening furnace is presented in which seal lines in a liquid crystal display panel are hardened. The seal hardening furnace includes a cassette having a rack bar structure. The rack bar structure has rack bars for supporting the substrate along one direction and rack bar supports at ends of the rack bars that support the rack bars. The rack bars have air discharge openings therein. An air injecting passage is connected to the rack bar supports. An air supply unit supplies air through the air injecting passage and through the discharge openings to support the substrate thereon.