Bendable Display Lower-Member Structure for Simplified Manufacturing
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Solution Overview
Problem
Existing display devices with bendable portions face challenges in reducing manufacturing costs and simplifying the process, particularly in the design and integration of components like the lower member under the display panel.
Innovation Solution
A display device design featuring a lower member with a flat part, a protruding part, and a pad part, where the protruding and pad parts contact each other upon bending, and are made of materials like polymer resin and carbon black, providing thermal conductivity and impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a lower member is disposed under a display panel with a bendable portion, then structural support and protection are provided, but manufacturing cost and process complexity increase
Solution Approach 1:
The lower member is divided into three distinct parts: a flat part overlapping the active region, a protruding part extending toward the bending region, and a pad part overlapping the peripheral region with circuit components. This segmentation allows each part to be optimized for its specific function while simplifying the overall manufacturing process by enabling separate formation and integration of functional zones.
Solution Approach 2:
Different regions of the lower member are assigned different thicknesses and material properties: the flat part has a first thickness for general support, the protruding part has a second thickness for stress distribution during bending, and the pad part has a third thickness for protecting circuit components. This local differentiation optimizes structural performance while reducing unnecessary material usage.
2Reliability
If the lower member includes multiple parts (flat part, protruding part, pad part), then functional performance is improved, but device complexity increases
Solution Approach 1:
The flat part, protruding part, and pad part are integrated into a single lower member structure that is formed in one piece. This merging approach maintains the functional advantages of having differentiated regions while avoiding the complexity of assembling multiple separate components, thereby simplifying the overall device structure.
Solution Approach 2:
The lower member serves multiple functions simultaneously: the flat part provides general structural support and protection, the protruding part manages stress during bending operations, and the pad part protects circuit components. This multi-functionality is achieved within a single integrated structure, reducing the need for additional separate components.
3Stability of the object's composition
If the protruding part and pad part contact each other upon bending, then structural integrity is maintained, but manufacturing precision requirements increase
Solution Approach 1:
The protruding part and pad part are pre-positioned during the formation process of the lower member, with their relative positions and dimensions predetermined to ensure proper contact upon bending. This preliminary positioning accounts for the bending deformation, ensuring that the parts will contact each other at the correct location and orientation without requiring high-precision post-bending adjustment.
Solution Approach 2:
The dimensions and positions of the protruding part and pad part are optimized based on the expected bending radius and deformation characteristics. By adjusting parameters such as the thicknesses of different parts and their relative positions during the formation process, the design ensures that contact occurs at the intended location while maintaining manufacturing feasibility.
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 design reduces manufacturing costs and simplifies the process by ensuring effective contact and integration of components, enhancing thermal conductivity and impact resistance while maintaining structural integrity during bending.
Implementation Method 1
the flat part, the protruding part, and the pad part may include a polymer resin and carbon black... the lower member may have a thermal conductivity of about 20 watts per meter Kelvin (W/mk) to about 100 W/mk
Data Source
AI summary
A display device includes an active region, a bendable region, and a pad region which is spaced apart from the active region along a direction with the bendable region therebetween and includes a driving chip and pads, and a lower member including a flat part which overlaps the active region and is in contact with the display panel at the first region, a protruding part which is on the flat part and adjacent to a boundary between the active and bendable regions, and a pad part which is disconnected from the flat part and the protruding part, overlaps the pad region and is in contact with the display panel at the pad region. The display panel which is bent at the bendable region includes the protruding part and the pad part in contact with each other.