Bendable Substrate Actuator for Compact Display Repositioning
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Solution Overview
Problem
Conventional display apparatuses using flexible printed circuit substrates become large due to the need to bend the substrate multiple times, which increases the load and can cause electrical components to move undesirably.
Innovation Solution
A compact display apparatus design that includes a display, a bendable substrate connected to the display, and an actuator generating a driving force to move the display. The actuator is positioned shifted from the display, and the substrate is fixed closer to the actuator side, extending from the connected portion towards the actuator side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible printed circuit substrate is bent multiple times to move the display, then the display can be repositioned, but the system size increases and the structure becomes complex
Solution Approach 1:
The patent divides the substrate system into distinct functional segments: a rigid substrate for structural support and control substrate mounting, and a flexible printed circuit substrate for electrical connections. This segmentation allows the flexible substrate to be bent for repositioning while the rigid substrate maintains system stability, reducing overall structural complexity.
Solution Approach 2:
The flexible printed circuit substrate acts as an intermediary element between the rigid substrate and the display. By positioning and bending this flexible intermediary, the display can be repositioned without requiring complex mechanical structures, thus simplifying the overall system while maintaining adaptability.
2Adaptability or versatility
If the flexible printed circuit substrate is bent multiple times to enable display movement, then the display can be repositioned, but the system size becomes large
Solution Approach 1:
The patent utilizes the second direction (lateral dimension) for actuator placement and substrate extension, rather than only bending in the primary movement direction. This dimensional approach allows compact packaging by distributing components across different spatial dimensions, enabling display repositioning without increasing overall system volume.
3Adaptability or versatility
If the flexible printed circuit substrate is bent to move the display, then the display can be repositioned, but electrical components may move undesirably
Solution Approach 1:
The patent segments the substrate system so that the rigid substrate provides a stable platform for mounting control substrates and electrical components, while the flexible printed circuit substrate handles only the electrical connection functions. This segmentation ensures that electrical components remain stable on the rigid substrate while the flexible substrate can be bent for display repositioning without affecting component stability.
Solution Approach 2:
The flexible printed circuit substrate serves as an intermediary that transmits electrical signals between the stable rigid substrate and the movable display. By confining the bending action to this flexible intermediary layer, the patent protects electrical components on the rigid substrate from unwanted movement while still enabling display repositioning through controlled substrate deformation.
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 the load caused by bending the flexible printed circuit substrate and prevents electrical components from moving, while maintaining a compact form factor, enabling stable diopter changing operations and excellent visuality in applications like AR, MR, and VR devices.
Implementation Method 1
an actuator configured to generate a driving force to move the display in a first direction that intersects a display surface of the display
Implementation Method 2
one conventional structure changes a bending state of a flexible printed circuit substrate connected to the electrical component and the rigid substrate
Data Source
AI summary
A display apparatus is attachable to a user. The display apparatus includes a display, a substrate connected to the display and bendable, and an actuator configured to generate a driving force to move the display in a first direction that intersects a display surface of the display. The actuator is disposed at a position shifted from the display in a second direction different from the first direction. The substrate is fixed at a position closer in the second direction to a surface of the display on a side where the actuator is located than to a surface of the display on a side where the actuator is not located. The substrate extends in the second direction from a connected portion of the substrate connected to the display toward the side where the actuator is located.