Rotatable LCD Cassette Bars for Defect-Free Panel Transfer
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Solution Overview
Problem
Cassette designs for liquid crystal display (LCD) devices struggle to accommodate LCD panels of varying sizes, leading to defects during transfer between processing lines due to improper positioning of supporting pads, which can press on image display regions.
Innovation Solution
A rotatable supporting bar system with pads of varying gaps on each surface, allowing for adjustable positioning to avoid contact with image display areas, ensuring proper alignment and preventing defects during transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed supporting bars with pads are used in the cassette, then the substrate can be securely held during transfer, but the pads may contact and press on image display regions of LCD panels with varying sizes, causing defects
Solution Approach 1:
The supporting bars are made rotatable about their longitudinal axes, allowing the pads to be dynamically repositioned to different surfaces of the supporting bar. This dynamic adjustment enables the pads to contact only the dummy regions of LCD panels regardless of panel size, preventing defects while maintaining secure holding during transfer operations.
2Manufacturing precision
If the cassette is designed for a specific panel size, then the pads can be precisely positioned to avoid image display regions, but the cassette cannot accommodate LCD panels of different sizes
Solution Approach 1:
The rotatable supporting bars allow the cassette to adapt to different LCD panel sizes by rotating the bars to position pads on appropriate surfaces. Each surface of the supporting bar has pads positioned at different gaps, enabling precise positioning for various panel dimensions while maintaining the ability to accommodate multiple sizes within the same cassette.
Solution Approach 2:
The supporting bar is designed with multiple surfaces, each having pads at different gaps, making it universally applicable to LCD panels of various sizes. A single supporting bar can serve multiple functions by rotating to different orientations, eliminating the need for multiple dedicated supporting bars for different panel sizes.
3Adaptability or versatility
If multiple supporting bars with different pad configurations are used, then various panel sizes can be accommodated, but the device complexity and manufacturing cost increase
Solution Approach 1:
Instead of using multiple different supporting bars for different panel sizes, the invention uses a single multi-functional supporting bar with multiple surfaces. Each surface has pads positioned at different gaps, allowing one supporting bar to replace several specialized bars, thereby reducing device complexity and manufacturing costs while maintaining versatility.
Solution Approach 2:
The invention merges the functions of multiple supporting bars with different pad configurations into a single supporting bar structure. By combining multiple surfaces with different pad arrangements on one bar, the design reduces the total number of components while achieving the same adaptability to various panel sizes.
Data Source
AI summary
A cassette for a liquid crystal display (LCD) device, comprises: a body for receiving a substrate on which a plurality of LC panels divided from one another by a dummy region are formed; a plurality of supporting bars rotatably installed in the body and having a predetermined shape, for supporting a substrate; and a plurality of pads formed on each surface of the supporting bar with a different gap therebetween and contacting the dummy region of the substrate. When LCD devices of various sizes are received in the cassette, supporting bars for supporting each of the LCD devices are prevented from contacting an image display region of the LCD device and thus an inferiority of the LCD device is prevented.