Flexible Display Bonding Jig with Stopper to Prevent Bubbles
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Solution Overview
Problem
The generation of bubbles between the display panel and the cover window during the bonding process in flexible display devices, which can lead to reduced product yield and potential damage due to increased pressure requirements.
Innovation Solution
A manufacturing apparatus and method that utilize a first jig with a bent portion to receive the cover window, a second jig to support the display panel, and a stopper system to prevent contact between the display panel and the curved ends of the cover window, ensuring proper alignment and bonding without bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cover window with a bent or curved side portion is used to create a side-view display device, then the display device can provide additional auxiliary display area, but bubbles are generated between the cover window and the display panel during bonding
Solution Approach 1:
The patent applies preliminary action by pre-forming the cover window with a bent or curved side portion before the bonding process. This pre-shaping allows the cover window to be precisely configured for the side-view display application, while the subsequent bonding process is optimized to accommodate this pre-formed shape, preventing bubble generation despite the complex geometry
Solution Approach 2:
The patent employs parameter changes by modifying the bonding process parameters when bonding a cover window with a bent side portion. This includes adjusting bonding pressure, temperature, and timing to account for the curved geometry, ensuring that the bonding parameters are optimized for the specific shape to prevent bubble formation while maintaining the desired side-view display configuration
2Strength
If increased pressure is applied to bond the display panel and cover window, then bonding strength is improved, but bubble generation is exacerbated and risk of damage increases
Solution Approach 1:
The patent applies parameter changes by optimizing the bonding pressure to a specific range that provides sufficient bonding strength without being excessive. This controlled pressure parameter prevents bubble generation while achieving the required bond strength between the display panel and cover window, avoiding the harmful effects of both insufficient and excessive pressure
Solution Approach 2:
The patent introduces an intermediary substance (adhesive) between the display panel and cover window that facilitates bonding at controlled pressure levels. This adhesive intermediary distributes the bonding pressure evenly, achieving strong adhesion without requiring excessive force that would cause bubble formation or damage to the components
Data Source
AI summary
A manufacturing apparatus of a display device that prevents generation of bubbles between a display panel and a cover window is presented. The apparatus includes a first jig that includes a first portion including a center and a second portion that includes a bend on at least one side of the first portion, and where a cover window is received; a second jig that faces the first portion of the first jig, wherein the cover window and a display panel are disposed between the first jig and the second jig; and a stopper detachably provided adjacent to an end of the second portion of the first jig.