Dual-Display Device Using Bent Flexible Substrate
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Solution Overview
Problem
Existing dual-display devices are complex and costly to manufacture, with difficulty in achieving slimness and high yield rates due to the need for separate substrates and driving units, which limits their flexibility and usability.
Innovation Solution
A dual-display device is manufactured using a flexible substrate with two opposing surfaces, where the first and second display units are formed on one substrate and connected via lines, with a common driving unit applying signals to both units, allowing for easy bending and encapsulation to achieve a slim, flexible design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a dual-display device is manufactured using conventional methods with separate rigid substrates, then the device can display images on dual screens, but the device becomes thick and heavy with complex manufacturing processes
Solution Approach 1:
The patent merges two separate display substrates into a single flexible substrate by bending it to form two opposing surfaces. This integration eliminates the need for separate rigid substrates, reducing structural complexity and manufacturing steps while achieving dual-display functionality.
Solution Approach 2:
The patent transitions from a planar arrangement of two separate substrates to a three-dimensional bent configuration. By bending the flexible substrate, the two display surfaces are positioned on opposite sides of the bend, enabling dual-display functionality within a single substrate layer and reducing overall device thickness.
2Adaptability or versatility
If separate driving units are used for each display unit, then each display can be controlled independently, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent implements a universal driving unit that controls both display units through a single controller. This multi-functional approach allows independent control of each display while using one driving unit, reducing device complexity and manufacturing difficulty compared to using separate driving units for each display.
3Length of moving object
If a flexible substrate is bent to create dual screens, then the device becomes slim and lightweight, but the manufacturing precision and yield rate become challenging
Solution Approach 1:
The patent uses a flexible substrate that can be bent to form two opposing display surfaces. This flexible film approach enables the device to achieve slim thickness and lightweight construction while maintaining manufacturing feasibility through established flexible substrate processing techniques.
4Ease of manufacture
If lines are disposed in the bending area to connect display units, then electrical connection is achieved, but the lines are vulnerable to damage and reliability decreases
Solution Approach 1:
The patent protects the lines disposed in the bending area by nesting them within encapsulation layers. This protective structure shields the electrical connections from mechanical damage and environmental factors, enhancing reliability while maintaining the simplicity of the bending-based connection approach.
Data Source
AI summary
A dual-display device includes a flexible substrate comprising first and second surfaces opposing each other, the first surface comprising a first area and a second area, the flexible substrate being bent to allow the first and second areas of the first surface to face each other, the second surface comprising first and second areas opposing the first and second areas of the first surface, respectively. The device further includes a first display unit formed over the first area of the second surface of the bent flexible substrate, and realizing an image; a second display unit formed over second area that is opposite to the first area of the second surface of the bent flexible substrate, electrically connected to the first display unit via lines, and realizing another image; and a common driver unit electrically connected to a pad area that extends from the first display unit, and configured to transmit at least a signal to drive the first display unit and the second display unit.