Display Module Adhesive Barrier Layout for Edge Dark Lines
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Solution Overview
Problem
The narrow frames of display devices lead to adhesive overflow in the display region, affecting the display effect due to refracted light and dark lines at the screen edges.
Innovation Solution
A display module design with a barrier wall on the support stage of the frame body and a controlled adhesive layer configuration, ensuring the overflowed adhesive portion's width is less than the width of three pixels, reducing adhesive overflow and minimizing light refraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive layer is used to bond display panel and frame body, then bonding strength is improved, but adhesive overflow occurs in display region causing dark lines and affecting display effect
Solution Approach 1:
The frame body is divided into two functional stages: a bearing stage that supports the optical film and a support stage that provides bonding surface for adhesive layer. This segmentation allows the adhesive to be confined to the support stage area, preventing overflow into the display region while maintaining adequate bonding strength between the display panel and frame body.
Solution Approach 2:
The bearing stage is designed with a localized bonding area where adhesive layer is applied. This creates a spatial differentiation: the display region remains free of adhesive (maintaining display quality) while the support stage provides sufficient adhesive coverage (ensuring bonding strength). The local quality of adhesive presence is controlled to be only where structurally necessary.
2Area of stationary object
If narrow frame design is implemented, then screen-to-frame ratio is improved, but adhesive overflow more easily enters display region causing dark lines
Solution Approach 1:
By segmenting the frame body into bearing stage and support stage with distinct functional zones, the adhesive application area is strictly limited to the support stage. This segmentation ensures that even with narrow frame design where the support stage is closer to display region, the adhesive cannot overflow into the display area because the bearing stage physically separates the adhesive zone from the optical path.
Solution Approach 2:
The bearing stage acts as an intermediary structure between the support stage (adhesive bonding zone) and the display region (optical zone). It mediates the spatial relationship by providing a physical barrier that prevents adhesive from migrating into the display region, enabling narrow frame design without compromising display quality.
Data Source
AI summary
Provided is a display module. The display module includes: a display panel; an adhesive layer; and a backlight module including a backlight source, a frame body, and an optical film, wherein the frame body includes a bearing stage and a support stage, wherein the bearing stage includes a bearing face configured to bear the optical film, the support stage is affixed to the bearing face; wherein the adhesive layer includes an adhesive portion and an overflowed adhesive portion, a maximum width of a cross-section of the overflowed adhesive portion being less than or equal to an overall width of three pixels closest to an edge of a display region of the display panel.