Beam Deflector for 3D Displays Using Wavelength Selective Polarization
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Solution Overview
Problem
Existing beam deflectors for three-dimensional displays face challenges in efficiently directing light of different colors without causing scattering, particularly due to the bulkiness of spatial-multiplexing methods and the inconvenience of time-multiplexing methods which require faster responsiveness.
Innovation Solution
A beam deflector incorporating a wavelength selective polarizer and liquid crystal deflectors with adjustable optical path change surfaces, controlled by a controller to deflect light of specific wavelengths in precise directions, reducing scattering by aligning liquid crystal molecules and adjusting their refractive indices to match the polarization states of different color lights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If spatial-multiplexing method is used to deflect different color lights by separate beam splitters in separate spaces, then scattering of light is prevented, but the system becomes more bulky
Solution Approach 1:
The patent merges multiple beam deflection functions into a single beam deflector by using a single optical path change surface that can be dynamically adjusted to deflect different wavelength lights in different directions. This combines what would traditionally require separate beam splitters and spaces into one integrated device, preventing light scattering while avoiding the bulkiness of spatial-multiplexing systems
Solution Approach 2:
The patent employs dynamic control of the optical path change surface through liquid crystal molecules whose orientation can be changed by applying voltages. This allows a single static physical structure to perform multiple deflection functions dynamically, eliminating the need for multiple separate beam splitters and reducing system volume while maintaining precise control over different wavelength lights
2Manufacturing precision
If time-multiplexing method is used to divide time according to color of light, then deflection direction can be finely adjusted, but a beam deflector with much faster responsiveness is required
Solution Approach 1:
The patent uses liquid crystal molecules that can be dynamically reoriented by applying voltages to electrode parts, enabling continuous and precise adjustment of the optical path change surface. This dynamic control allows fine-tuning of deflection directions for different wavelengths without requiring ultra-fast response times, as the system can maintain precise directional control through steady-state voltage application rather than rapid switching
Solution Approach 2:
The patent changes the physical state and orientation parameters of liquid crystal molecules by applying different voltages to different electrode parts. This allows independent control of the optical path change surface angle for each wavelength band, achieving fine deflection direction precision through parameter adjustment rather than time-division multiplexing, thus avoiding the need for extremely fast responsiveness
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 solution enables efficient and precise direction of light in three-dimensional displays, reducing scattering and improving image quality by deflecting light of different wavelengths in the same direction, thus enhancing the performance of three-dimensional display devices.
Implementation Method 1
a first wavelength selective polarizer configured to selectively convert a polarization state of light in a first wavelength band into a first polarization state
Implementation Method 2
a first liquid crystal deflector configured to selectively deflect light incident from the first wavelength selective polarizer, the first liquid crystal deflector including liquid crystal molecules and a first optical path change surface
Implementation Method 3
an angle of inclination of the first optical path change surface may be adjusted based on a voltage applied by the controller between the first electrode part and the second electrode part
Implementation Method 4
a first liquid crystal deflector configured to selectively deflect light incident from the first wavelength selective polarizer
Data Source
AI summary
A beam deflector includes a first wavelength selective polarizer configured to convert a polarization state of light in a first wavelength band into a first polarization state, a first liquid crystal deflector including liquid crystal molecules and an optical path change surface to deflect light incident from the first wavelength selective polarizer, and a controller configured to control the first liquid crystal deflector to adjust an angle of the first optical path change surface.