Flexible Display Slidable Structure for Rear Touch Sensing
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Solution Overview
Problem
Existing electronic devices face challenges in expanding the display region without compromising portability, particularly in slide-type devices where the flexible display is rolled in a closed state, limiting rear surface visibility and touch input sensitivity.
Innovation Solution
An electronic device design featuring a first structure, a second structure that slides relative to the first, a display module, and a back cover with a transparent window region and conductive layer, allowing the display to be partially flexible and enabling rear surface exposure and high-sensitivity touch input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the flexible display is rolled in a closed state to maintain portability, then the device remains compact and portable, but the display region on the rear surface is not visually exposed and touch input sensitivity is limited
Solution Approach 1:
The display module is designed to be dynamically reconfigurable between rolled and unrolled states. The flexible display can transition from a compact rolled configuration in closed state to an extended configuration in open state, allowing the rear surface display region to be visually exposed when needed while maintaining portability when closed.
Solution Approach 2:
The display region is extended into the third dimension by rolling the flexible display along its length. When rolled, the display occupies a compact linear space; when unrolled, it expands to cover the rear surface area, effectively using dimensional transformation to resolve the contradiction between compactness and display area.
2Device complexity
If the flexible display is rolled in a closed state, then the device structure is simplified, but touch input sensitivity on the rear surface is reduced
Solution Approach 1:
A conductive layer is introduced as an intermediary between the flexible display and the back cover. This conductive layer enhances the coupling between the display and the back cover, improving touch input sensitivity by facilitating better electrical connection and signal transmission when the display is in contact with the back cover in closed state.
Solution Approach 2:
The electrical properties of the interface between the flexible display and back cover are modified by adding the conductive layer. This changes the electrical conductivity parameter of the contact interface, thereby improving touch sensitivity without requiring structural complexity.
3Area of stationary object
If a transparent window region is added to the back cover to expose the display, then the display region on the rear surface is visually exposed, but the back cover structure becomes more complex
Solution Approach 1:
The back cover is designed with multi-functionality: it serves both as a protective cover and as a transparent window through which the display is visible. The conductive layer on the back cover simultaneously provides structural support, electrical connection for touch sensitivity, and optical transparency, reducing the need for separate components.
4Measurement precision
If the conductive layer is disposed on the back cover to improve touch sensitivity, then touch input recognition is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The conductive layer is merged with the back cover structure, forming an integrated component. This combination allows the conductive layer to be applied during the back cover manufacturing process itself, such as through coating or lamination techniques, rather than requiring separate assembly steps, thereby minimizing manufacturing complexity.
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
The design allows for expanded display regions on both front and rear surfaces, enhancing usability and touch sensitivity by visually exposing the flexible display and incorporating a conductive layer on the back cover for improved input recognition.
Implementation Method 1
a conductive layer disposed on at least a portion of the window region to face toward the first structure... configured to receive a touch input from the outside through the window region and the conductive layer
Data Source
AI summary
An electronic device includes a display module including a first region and a second region which extends from the first region and tactically senses an input via a conductive layer, a first structure facing the display module, a second structure slidably connected to the first structure, and slidable together with the display module along the first structure, and a back cover forming a rear surface of the electronic device and including a window region, and the conductive layer which is on the window region. The second structure which slides towards and away the first structure respectively closes and opens the electronic device, the electronic device which is closed defines the front surface including the first region, together with the second region tactically exposed at the window region, and the electronic device which is open defines the front surface including the first region and a portion of the second region.