OLED Display Module Narrow Bezel via Inclined Surface Attachment
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Solution Overview
Problem
The existing attachment method between the middle bezel and the cover glass in OLED display modules restricts the realization of a narrow bezel due to fitting and assembly tolerances, leading to a wider bezel design.
Innovation Solution
The implementation of an OLED display module with a middle bezel and cover glass where the cover glass features a first inclined surface and the side plate includes a corresponding second inclined surface, allowing for a reduced bezel width while maintaining sufficient attachment strength through a filling structure made of a curable polymer material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a double-sided adhesive tape with thickness of about 1 mm is used to attach the cover glass to the middle bezel, then the attachment strength is sufficient, but the bezel width becomes wider
Solution Approach 1:
The patent changes the attachment method from using a thick double-sided adhesive tape (1 mm) to an inclined surface attachment structure. The cover glass and middle bezel are attached through inclined surfaces that form a wedge-shaped joint, eliminating the need for thick adhesive and reducing the overall attachment thickness to enable narrow bezel design.
Solution Approach 2:
The patent introduces inclined surfaces (first inclined surface on cover glass, second inclined surface on middle bezel) that form a wedge-shaped attachment joint. This angular/curved geometric configuration replaces the flat adhesive tape attachment, allowing for thinner attachment and narrower bezel while maintaining structural strength through the geometric interlock.
2Manufacturing precision
If a distance of 0.6 mm is maintained between the middle bezel and the module panel due to fitting and assembly tolerances, then the assembly tolerance is accommodated, but the bezel width increases
Solution Approach 1:
The patent incorporates a filling structure (such as adhesive or cushioning material) within the inclined surface attachment joint between the cover glass and middle bezel. This filling structure beforehand compensates for fitting and assembly tolerances, allowing the components to be attached with tighter tolerances and eliminating the need for the 0.6 mm gap, thereby enabling narrower bezel width.
3Reliability
If the cover glass and middle bezel are attached with a thick adhesive layer, then the sealing is sufficient, but the attachment area required increases
Solution Approach 1:
The patent changes the attachment geometry from a large-area flat adhesive attachment to a concentrated inclined surface attachment. The wedge-shaped joint created by the inclined surfaces concentrates the sealing function into a smaller, more efficient attachment area, improving sealing performance per unit area while reducing the total attachment area required.
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 configuration reduces the bezel width while ensuring strong attachment and sealing, allowing for a more compact design by eliminating the need for the typical 0.6 mm gap between the middle bezel and the display panel.
Implementation Method 1
a filling structure made of a curable polymer material
Data Source
AI summary
This disclosure relates to an organic light-emitting diode (OLED) display module, including a middle bezel, a display panel, and a cover glass. The cover glass is located at a light-emitting side of the display panel and the middle bezel includes a side plate surrounding the display panel and the cover glass. A side surface of the cover glass is a first inclined surface inclined at an angle to a light incident surface of the cover glass, and the side plate includes a second inclined surface inclined correspondingly and being attached to the first inclined surface. This disclosure also relates to a display device.