Vehicle Display Module Ultra-Narrow Bezel via Protrusion Staggering
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Solution Overview
Problem
Existing display modules with vehicle-mounted applications face limitations in reducing the bezel width due to constraints in the thickness of the flanges and the arrangement of the film assembly and backlight source.
Innovation Solution
The display module incorporates a middle frame with sub-frames that include protrusions extending into the containing cavity, allowing the flanges and film assembly to be staggered, thereby reducing the bezel width and enabling an ultra-narrow bezel design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the flange is increased to provide sufficient support structure, then the structural strength is improved, but the bezel width cannot be further reduced
Solution Approach 1:
The patent introduces a protrusion structure that extends in the thickness direction of the flange, creating a multi-level spatial arrangement. The protrusion forms a staggered configuration with the film assembly in the thickness direction, allowing the expansion gap to be positioned in a different dimensional plane rather than increasing the horizontal bezel width. This dimensional transition enables simultaneous achievement of structural strength and narrow bezel width.
2Reliability
If the expansion gap is reserved between the flange and the film assembly, then the thermal expansion is accommodated, but the total width of the bezel increases
Solution Approach 1:
The expansion gap is repositioned from a horizontal arrangement to a vertical arrangement in the thickness direction of the flange. The protrusion structure creates a staggered configuration where the expansion gap exists between the protrusion and the film assembly in the thickness direction, not in the horizontal plane. This allows thermal expansion accommodation without increasing the horizontal bezel width.
Solution Approach 2:
The protrusion structure is nested on the flange, creating a multi-level configuration where the expansion gap is embedded within the thickness direction of the flange rather than occupying horizontal space. This nesting approach allows the expansion gap to be accommodated within the existing flange thickness, preventing bezel width increase.
3Length of stationary object
If the distance between the sub-frame body and the film assembly is reduced to minimize bezel width, then the manufacturing precision requirement increases
Solution Approach 1:
The flange is segmented into a body portion and a protrusion portion, creating a multi-level structure. The protrusion extends into the containing cavity to form a staggered configuration with the film assembly, providing a reference surface for precise positioning. This segmentation allows the expansion gap to be positioned relative to the protrusion rather than the entire flange, simplifying the precision requirements.
Solution Approach 2:
The protrusion acts as an intermediary structure between the flange and the film assembly. It provides a dedicated reference surface for positioning the film assembly and defining the expansion gap, thereby reducing the direct precision requirements between the flange body and the film assembly. The protrusion mediates the spatial relationship and simplifies assembly tolerances.
Data Source
AI summary
A display module includes a display panel, a middle frame, a film assembly, a backlight source and a backplane. The middle frame includes sub-frames each including a body and a support portion. The backplane includes a substrate and flanges. The sub-frames include at least one first sub-frame. The body of the first sub-frame is provided with a protrusion and the protrusion abuts against a corresponding flange. In the thickness direction of the flange, the orthographic projection of the protrusion on the substrate does not completely cover the orthographic projection of the corresponding flange on the substrate. The backlight source and the film assembly are sequentially arranged on the substrate, and the film assembly is located between the support portions and the flanges; and in the thickness direction of the flanges, an expansion gap is reserved between the protrusions and the film assembly.