Naked Eye 3D Display Switching via Electrowetting Fluid Control
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Solution Overview
Problem
Current naked eye 3D display technologies using liquid crystal lenses face issues with restricted view angles and interference among adjacent pixels, limiting the performance of 2D-3D switching devices.
Innovation Solution
A 2D-3D switching device employing a prism with curved surface zones and perimeter zones, along with hydrophobic and hydrophilic fluids, and ITO electrodes, utilizes Electrowetting principles to control fluid contact with the prism, changing light paths between 2D and 3D display states by altering the dielectric layer's properties with electric charges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If liquid crystal lens is used for 2D-3D switching, then switching function between 2D and 3D display states is achieved, but view angle is restricted and interference among adjacent pixels occurs
Solution Approach 1:
The patent replaces the liquid crystal lens system with a microfluidic system using hydrophobic and hydrophilic fluids. The electrowetting mechanism controls fluid distribution between different zones to achieve 2D-3D switching, eliminating the optical interference and view angle restrictions inherent in liquid crystal approaches.
Solution Approach 2:
The prism surface is divided into curved surface zones and perimeter zones with distinct fluid distribution characteristics. Hydrophobic fluid occupies curved surface zones while hydrophilic fluid occupies perimeter zones, creating localized optical properties that enable 3D display without adjacent pixel interference.
2Object-affected harmful factors
If prism is used for light splitting, then naked eye 3D effect is achieved, but 2D-3D switching function cannot be equipped
Solution Approach 1:
The patent makes the static prism system dynamic by introducing controllable fluid distribution. Through electrowetting control, the system dynamically switches between 2D and 3D states by altering which fluid occupies which zone, enabling the prism to perform multiple functions.
Solution Approach 2:
The single prism structure serves dual purposes: it provides light splitting for naked eye 3D effect when hydrophilic fluid occupies curved surface zones, and it allows 2D display when hydrophobic fluid occupies those zones. This multi-functional design eliminates the need for separate optical elements.
3Ease of operation
If electrowetting is used to control fluid contact with prism, then seamless 2D-3D switching is achieved, but device complexity increases
Solution Approach 1:
The patent combines the dielectric layer, electrodes, and fluid control mechanisms into an integrated microfluidic device structure. The electrowetting control is built directly into the device architecture rather than being a separate control system, reducing overall complexity while maintaining seamless switching capability.
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 approach allows for seamless switching between 2D and 3D display states while minimizing view angle restrictions and pixel interference, enhancing the display quality of naked eye 3D technology.
Implementation Method 1
By electrifying or diselectrifying the electrodes to change the property of the dielectric layer to be hydrophilic or hydrophobic. Employing the theory of Electrowetting, the first fluid and the second fluid are controlled to contact with the curved surface zone of the prism
Implementation Method 2
A refractive index of the first fluid is close to a refractive index of the prism of the first substrate, and a refractive index of the second fluid is distinguished from the refractive index of the prism of the first substrate
Data Source
AI summary
The present invention provides a 2D-3D switching device of a naked eye 3D display, comprising a first substrate (1), a second substrate (2) oppositely located to the first substrate (1), a plurality of electrodes (3) located between the first substrate (1) and the second substrate (2) and on the second substrate (2), a dielectric layer (4) formed on the second substrate (1) and completely covering surfaces of the plurality of electrodes (3) and a first fluid (51) which is hydrophobic and a second fluid (52) which is hydrophilic which fill between the first substrate (1) and the second substrate (2); the first substrate (1) comprises a prism (11), and a side of the first substrate (1) having the prism (11) is opposite to the second substrate (2), and the prism (11) of the first substrate (1) comprises a plurality of curved surface zones (111) which are evenly distributed and a plurality of perimeter zones (112) located surrounding the curved surface zones (111), and each of the electrodes (3) is positioned corresponding to one curved surface zone (111). The device can commodiously achieve the switch between 2D display state and 3D display state of the naked eye 3D display.