Display Panel Bezel Dam Curing to Prevent Adhesive Leakage
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Solution Overview
Problem
The attachment of a transparent panel to a large display panel with a bezel covering its periphery leads to adhesive leakage into gaps between the panel and the bezel, potentially causing short circuits or contamination of optical components, resulting in unreliable display performance.
Innovation Solution
A display manufacturing device and method that uses a light curable resin to create a dam along the inner edge of the bezel, ensuring the adhesive remains within the dam and is cured effectively, preventing leakage and ensuring reliable attachment of the transparent panel to the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a light curable resin with low viscosity is filled into a dam to stick the transparent panel to the display panel, then the adhesive bonding strength is improved, but the adhesive leaks into the gap between the front surface and the bezel causing short circuits or optical contamination
Solution Approach 1:
A first light curable resin with high viscosity is applied to form a dam structure along the inner peripheral edge of the bezel before filling the second low viscosity light curable resin. This preliminary dam creation prevents the low viscosity adhesive from leaking into the gap between the front surface and bezel, while still allowing effective bonding when the second resin is filled and cured
Solution Approach 2:
Different regions use different resin viscosities for different functions: the first light curable resin with high viscosity is used specifically at the gap region to form a sealing dam, while the second light curable resin with low viscosity is used in the bonding region for optimal adhesion. This local differentiation of material properties prevents leakage while maintaining bonding strength
2Stability of the object's composition
If a bezel is attached to the large display panel to restrict warp, then the structural stability is improved, but the gap between the front surface and the bezel is created allowing adhesive leakage
Solution Approach 1:
The first light curable resin is applied in advance to form a dam structure that actively prevents the harmful effect of adhesive leakage before it can occur. This preliminary protective action counteracts the potential harm created by the gap between the front surface and bezel, allowing the bezel to maintain its warp-restricting function without causing leakage issues
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 solution ensures high reliability of the display by preventing adhesive leakage and ensuring proper curing, thus avoiding defects such as short circuits and optical contamination, enhancing the overall performance and durability of the display.
Implementation Method 1
a UV irradiation device that emits ultraviolet light in a direction that forms an acute angle with the front surface of the display panel, the direction allowing the light to reach the light curable resin that has entered the gap between the front surface and the bezel
Data Source
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AI summary
A display manufacturing device includes dispenser (100) that dispenses light curable resin (52) used to stick a transparent panel to front surface (24a) of display panel (24), and makes dam (56) by dispensing light curable resin (52) in such a manner that light curable resin (52) straddles front surface (24a) of display panel (24) and bezel (26), and that light curable resin (52) is along an inner peripheral edge of bezel (26). The display manufacturing device also includes light irradiation devices (102A, 102B) that emit light that cures dam (56). Light irradiation device (102A, 102B) emits light (LL) in a direction that forms an acute angle between the direction and front surface (24a) of display panel (24), the direction being a direction that allows the light to reach light curable resin (52) that has entered a gap between front surface (24a) and bezel (26).