Dual-Sided Display Optics With Switchable Dimming Lens Layers
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Solution Overview
Problem
Conventional display devices that only perform front display are inadequate for diverse application scenarios, failing to meet the varying requirements of different use cases.
Innovation Solution
A display device with a layered structure comprising transparent substrates and dimming layers, where each dimming layer can switch between planar and concave lens states, allowing for different display modes including front and rear display, privacy modes, and shared display, achieved through adjustable refractive indices and light control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional display device performs only front display, then the device structure is simple, but the adaptability to diverse application scenarios is insufficient
Solution Approach 1:
The display device achieves multi-functionality by enabling both front display and rear display modes through a single device structure. The display panel can switch between displaying content on the front surface (first display surface) and rear surface (second display surface), allowing one device to serve multiple display purposes and scenarios.
Solution Approach 2:
The display device employs dynamic control of the dimming layers to switch between different display modes. By adjusting the optical properties of the dimming layers through electrical signals, the device can dynamically transition between front display mode, rear display mode, and privacy mode, providing adaptability without requiring multiple fixed-configuration devices.
2Adaptability or versatility
If the display device enables both front and rear display, then the versatility is improved, but the device complexity increases due to multiple transparent substrates and dimming layers
Solution Approach 1:
The display device is segmented into multiple functional layers including first transparent substrate, display panel, second transparent substrate, first dimming layer, light source layer, second dimming layer, third transparent substrate, and fourth transparent substrate. Each layer performs a specific function, and this segmentation allows independent optimization and control of each component to achieve complex display modes.
Solution Approach 2:
The dimming layers serve as intermediary elements between the light source and the transparent substrates. These dimming layers mediate the optical paths by controlling light transmission and reflection, enabling the device to switch between front display, rear display, and privacy modes without requiring complete structural reconfiguration.
3Adaptability or versatility
If dimming layers switch between planar and concave lens states, then different display modes are achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The dimming layers change their optical parameters by switching between planar and concave lens states through electrical control. This parameter change approach allows the same physical layer to provide different optical functions without requiring manufacturing variations, thereby reducing manufacturing precision requirements while maintaining display mode versatility.
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 device provides versatile display options, enhancing usability across various scenarios by enabling front and rear display, privacy, and shared display modes, improving user experience and functionality.
Implementation Method 1
The second transparent substrate has a greater refractive index than the first transparent substrate. The fourth transparent substrate has a less refractive index than the third transparent substrate. Each of the multiple first dimming units and each of the multiple second dimming units both have a first state of being a planar lens and a second state of being a concave lens.
Data Source
AI summary
A display device is provided. The display device includes a display panel, a first transparent substrate, a second transparent substrate, a first dimming layer, a light source layer, a second dimming layer, a third transparent substrate, and a fourth transparent substrate that are sequentially stacked. The second transparent substrate has a greater refractive index than the first transparent substrate. The fourth transparent substrate has a less refractive index than the third transparent substrate. The first dimming layer includes multiple first dimming units. The light source layer includes multiple light sources. The second dimming layer includes multiple second dimming units. Each of the multiple first dimming units and each of the multiple second dimming units both have a first state of being a planar lens and a second state of being a concave lens.