Liquid Crystal Projection Lens Dynamic Angle Control
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Solution Overview
Problem
Existing projection devices face a trade-off between projection range and image quality, where increasing the projection angle to expand the range results in decreased energy density and resolution, and narrowing the angle to improve distance results in a narrower, less clear image.
Innovation Solution
A projection device comprising a light source, a spatial light modulator, and a liquid crystal projection lens that dynamically forms a lens region in the liquid crystal lens, allowing for flexible control of the projection direction and angle, enabling high-definition image projection in arbitrary directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the projection angle of projection light is increased to expand the projection range, then the projection range becomes wider, but the energy density of the projection light decreases and the reaching distance is limited
Solution Approach 1:
The patent applies dynamics by enabling the liquid crystal projection lens to dynamically change its projection angle and form lens regions at different positions. This allows the system to adapt the projection parameters in real-time, switching between wide-angle projection (when broad coverage is needed) and narrow-angle projection (when distance and energy density are prioritized), thus resolving the static trade-off between projection range and energy density
Solution Approach 2:
The patent changes the projection angle parameter and lens region position parameter dynamically. By adjusting these parameters, the system can optimize the balance between projection range and energy density according to different operational requirements, eliminating the fixed trade-off relationship
2Length of stationary object
If the projection angle of projection light is decreased to lengthen the reaching distance, then the reaching distance increases, but the projection range becomes narrow and the displayed image becomes unclear with decrease in resolution
Solution Approach 1:
The liquid crystal projection lens dynamically adjusts the projection angle and lens region position based on operational needs. When long reaching distance is required, the system decreases the projection angle; when high resolution is needed, it increases the projection angle. This dynamic adaptation resolves the contradiction between reaching distance and image resolution
Solution Approach 2:
The system dynamically changes the projection angle parameter and lens region position parameter to optimize the balance between reaching distance and image resolution. By adjusting these parameters according to different scenarios, the system can achieve both long reaching distance and high image resolution at different times
3Illumination intensity
If the projection range is compressed to maintain high energy density at distant objects, then the energy density is maintained, but the image formation becomes distorted without arbitrary projection direction control
Solution Approach 1:
The patent applies dynamics by enabling the liquid crystal projection lens to dynamically form lens regions at different positions and adjust projection angles. This allows the system to maintain high energy density at distant objects while simultaneously controlling the projection direction flexibly, resolving the contradiction between energy density maintenance and projection direction adaptability
Solution Approach 2:
The system dynamically changes the lens region position parameter and projection angle parameter to achieve both high energy density at distant objects and flexible projection direction control. By adjusting these parameters, the system can eliminate image distortion and project in arbitrary directions while maintaining energy density
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 allows for high-definition image projection over a wide range without distortion, overcoming the limitations of energy density and resolution trade-offs, by dynamically controlling the projection direction and angle.
Implementation Method 1
a liquid crystal projection lens that includes a liquid crystal region on which modulated light modulated by the spatial light modulator is incident and that projects the modulated light in a lens region dynamically formed in the liquid crystal region as projection light
Data Source
AI summary
A projection device a includes a light source that emits parallel light, a spatial light modulator that has a modulation part that modulates a phase of the parallel light emitted from the light source, a liquid crystal projection lens that includes a liquid crystal region on which modulated light modulated by the spatial light modulator is incident and that projects the modulated light in a lens region dynamically formed in the liquid crystal region as projection light, and a control unit that causes the lens region to be formed at a desired position in the liquid crystal region of the liquid crystal lens, sets a phase image corresponding to the projection light projected toward a projection target, to the modulation part of the spatial light modulator, and controls the light source to emit the parallel light toward the modulation part to which the phase image is set.