Display Panel Bonding Dam for Bezel Gap Adhesive Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The attachment of a transparent panel to a large display panel with a bezel-covered perimeter is challenging due to adhesive viscosity issues, which can lead to short circuits and contamination of optical components, reducing display reliability.
Innovation Solution
A display manufacturing device and method using a dispenser to create a dam of light curable resin straddling the display panel and bezel, with light irradiation devices emitting light at an acute angle to cure the adhesive, ensuring it remains within the dam and avoids gaps between the panel and bezel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light curable resin with low viscosity is filled into a dam to stick the transparent panel, then the adhesive can properly fill the bonding area, but the adhesive may go over the dam and enter the gap between the display panel and bezel causing short circuits or contamination
Solution Approach 1:
The patent divides the adhesive application into two distinct segments: a first light curable resin with high viscosity used to create the dam structure, and a second light curable resin with low viscosity used to fill the bonding area. This segmentation allows each adhesive to perform its specific function optimally - the first adhesive provides structural containment while the second adhesive ensures proper filling without overflowing into gaps between the display panel and bezel.
Solution Approach 2:
The patent applies different viscosity characteristics of adhesive at different locations. The first light curable resin with high viscosity is applied at the dam location to provide structural support and containment, while the second light curable resin with low viscosity is applied in the bonding area to ensure proper filling. This local quality differentiation resolves the contradiction by matching adhesive properties to specific functional requirements at different locations.
2Strength
If a bezel is attached to the large display panel to restrict warp, then the rigidity of the display panel is increased, but the gap between the front surface and bezel creates a pathway for adhesive to reach circuit boards or optical components
Solution Approach 1:
The patent performs preliminary action by creating the dam structure using the first light curable resin with high viscosity before filling the bonding area with the second adhesive. This preliminary dam creation establishes a containment barrier that prevents the low viscosity adhesive from entering the gap between the display panel and bezel, thereby preventing contamination of circuit boards and optical components while maintaining the rigid bezel structure.
Solution Approach 2:
The first light curable resin with high viscosity acts as an intermediary element between the bonding area and the gap between the display panel and bezel. This intermediary dam structure allows the low viscosity second adhesive to be properly contained and applied, preventing it from migrating into harmful areas while still enabling effective bonding within the intended region.
3Manufacturing precision
If ultra-violet light is used to cure the adhesive, then the adhesive cures effectively, but ultra-violet light does not reach the adhesive that has entered the gap between the front surface and bezel leaving it uncured
Solution Approach 1:
The patent segments the adhesive into two types with different viscosity characteristics, where the first high viscosity adhesive forms the dam structure that is accessible to UV light for curing, while the second low viscosity adhesive fills the bonding area within the containment of the first adhesive. This segmentation ensures that both adhesive portions can be properly cured by UV light without leaving uncured residue in inaccessible gap areas.
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 approach effectively prevents adhesive from entering gaps and curing issues, resulting in a display with high reliability and reduced manufacturing defects.
Implementation Method 1
a light irradiation device that emits light that cures the dam
Implementation Method 2
adhesive is conventionally used to stick a transparent panel, such as a cover panel or a touch panel, to a display panel
Data Source
AI summary
A display manufacturing device sticks a transparent panel to a display panel, the display panel including a front surface having a periphery covered by a bezel. The display manufacturing device includes: a dispenser that makes a dam by dispensing a light curable resin to straddle the front surface of the display panel and the bezel, and be along an inner peripheral edge of the bezel to stick the transparent panel to the front surface of the display panel; and at least one light irradiation device that emits light that cures the dam. The at least one light irradiation device emits the light in a direction that forms an acute angle between the direction and the front surface of the display panel, the direction being a direction that allows the light to reach the light curable resin that has entered a gap between the front surface and the bezel.