Grating Substrate with Movable Particles for 3D Display Viewing Angle Adaptation
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Solution Overview
Problem
Current naked-eye 3D display technologies, such as parallax barrier display, lack flexibility in presenting 3D images as the shape of the grating substrate is fixed, limiting the 3D display effect to specific eye positions.
Innovation Solution
A grating substrate with movable particles and control layers that can switch between refractive index and non-transparent states, allowing the grating units to change their light transmission direction, effectively switching between row and column arrangements to adapt to different viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed grating substrate is used for parallax barrier display, then the display structure is simple, but the flexibility in presenting 3D images is limited and user alignment is required
Solution Approach 1:
The patent applies the dynamics principle by making the grating substrate switchable between different states. The liquid crystal layer can change its molecular orientation under electric field control, transforming the grating substrate from a fixed structure to a dynamic one that can switch between transparent and opaque states, thereby enabling flexible 3D image presentation without requiring user alignment.
Solution Approach 2:
The patent utilizes parameter changes by modifying the refractive index and optical transparency of the liquid crystal material through voltage control. By changing the electrical parameter (voltage), the optical parameters (refractive index, transparency) of the liquid crystal layer are adjusted, allowing the grating substrate to adapt its light transmission characteristics for different viewing angles and 3D content requirements.
2Adaptability or versatility
If the grating substrate shape is fixed, then the manufacturing process is simple, but the 3D display effect is limited to specific eye positions
Solution Approach 1:
The liquid crystal layer enables dynamic adjustment of the grating substrate's optical properties. By applying different voltages, the liquid crystal molecules reorient themselves, changing the substrate's transparency and refractive index distribution. This dynamic capability allows the system to adapt to different viewing angles without requiring multiple fixed grating substrates with different shapes, simplifying manufacturing while expanding viewing flexibility.
Solution Approach 2:
The single grating substrate structure with liquid crystal layer serves multiple functions: it can act as a transparent barrier, an opaque barrier, or an adjustable refractive index modulator. This multi-functionality allows one manufactured component to replace what would traditionally require multiple specialized components for different viewing conditions, thereby improving ease of manufacture while enhancing adaptability.
3Ease of operation
If traditional parallax barrier technology is used, then the device structure is simple, but user alignment is required for proper 3D viewing
Solution Approach 1:
The patent implements feedback control by using sensors to detect the user's eye position and the controller to adjust the liquid crystal layer's voltage distribution accordingly. This closed-loop system automatically compensates for misalignment, eliminating the need for manual user alignment while maintaining proper 3D viewing conditions. The feedback mechanism continuously monitors and adjusts the system state to optimize performance.
Solution Approach 2:
The patent replaces the mechanical alignment requirement with an electrical control system. Instead of requiring physical adjustment of the grating substrate or user positioning, the system uses electrical signals to control the liquid crystal layer's optical properties, dynamically adapting to user position. This substitution of mechanical alignment with electrical control eliminates the need for user alignment while managing device complexity through integrated control circuitry.
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 solution enhances the flexibility of 3D display by enabling the grating substrate to switch between lateral and longitudinal directions, improving the 3D display effect across various viewing positions without the need for user alignment.
Implementation Method 1
the first control layer includes a first transparent electrode, the second control layer includes a second transparent electrode, the particles are charged particles
Implementation Method 2
the two control layers being configured to control movement of the plurality of particles
Implementation Method 3
the particles have a refractive index smaller than a refractive index of the first control layer
Data Source
AI summary
The grating substrate includes a first base substrate and a plurality of grating units on the first base substrate. The grating unit includes two control layers, a barrier structure between the two control layers, and a plurality of movable particles in a closed cavity surrounded by the barrier structure and the two control layers. The two control layers include a first control layer and a second control layer. The first control layer is located on a side of the second control layer distal from the first base substrate, and the two control layers are configured to control movement of the plurality of particles. The particles satisfy at least one of the following conditions: the particles have a refractive index smaller than a refractive index of the first control layer, or the particles are non-transparent particles.