Dual-Sided Display Panel Using Electrophoretic Reflective Layers
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Solution Overview
Problem
The current double-sided display design solution for electronic products, such as foldable mobile phones, involves disposing two independent screens back-to-back, leading to increased thickness and costs.
Innovation Solution
A display panel design incorporating a light-emitting diode and an electrophoretic structure with stacked electrode layers and a cavity filled with electrophoretic liquid and particles, allowing a single panel to function as two displays by aggregating particles on different electrode layers to form reflective layers on each surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two independent screens are disposed back-to-back to implement double-sided display, then dual-sided display functionality is achieved, but the overall thickness of the electronic product increases
Solution Approach 1:
The patent merges two independent display screens into a single integrated display panel structure. The first and second display surfaces are formed on the same panel body, sharing common structural components such as the support layer and encapsulation layers, thereby achieving dual-sided display functionality while reducing overall thickness compared to using two separate screens.
Solution Approach 2:
The display panel is designed with multi-functionality where a single panel body simultaneously provides two independent display surfaces. The structure integrates multiple functions including light emission, electrophoretic display, touch sensing, and protection within one unified component, eliminating the need for two separate screen assemblies.
2Adaptability or versatility
If two independent screens are disposed back-to-back, then dual-sided display is achieved, but manufacturing costs increase
Solution Approach 1:
The patent combines two display functions into a single manufactured panel, reducing material consumption and simplifying the manufacturing process. By forming both display surfaces on one panel body with shared layers and structures, the patent reduces production complexity and cost compared to manufacturing and assembling two independent screens.
3Length of stationary object
If a single display panel is used for dual-sided display, then thickness is reduced, but the structural complexity increases
Solution Approach 1:
The display panel is segmented into distinct functional layers including support layers, light-emitting diodes, electrophoretic structures with electrode layers and cavities, and encapsulation layers. This segmentation allows each layer to perform its specific function independently while contributing to the overall dual-sided display capability, managing structural complexity through modular design.
Solution Approach 2:
The patent utilizes vertical stacking of multiple functional layers within the panel thickness to achieve dual-sided display. By arranging electrode layers, electrophoretic cavities, and display surfaces in a stacked configuration along the thickness direction, the patent creates three-dimensional spatial organization that enables two independent display surfaces within a compact structure.
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 overall thickness and costs of the display panel by enabling dual-sided display functionality without the need for two separate screens, while maintaining efficient light transmission and touch sensing capabilities.
Implementation Method 1
an electrophoretic structure, where the electrophoretic structure is disposed on the display panel body, the electrophoretic structure is located between the first display surface and the second display surface
Data Source
AI summary
A display panel includes a display panel body, where the display panel body includes a first display surface and a second display surface that are disposed in a back-to-back manner; a light-emitting diode disposed on the display panel body; and an electrophoretic structure disposed on the display panel body. The electrophoretic structure includes a first electrode layer, an electrophoretic cavity, and a second electrode layer that are sequentially disposed in a stacked manner, the electrophoretic cavity is disposed corresponding to the light-emitting diode, and the electrophoretic cavity is filled with an electrophoretic liquid and electrophoretic particles. During display on the first display surface, the electrophoretic particles aggregate on the second electrode layer and form a first reflective layer; and during display on the second display surface, the electrophoretic particles aggregate on the first electrode layer and form a second reflective layer.