Illumination System Light-Shape Adjustment for Light-Field Displays
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Solution Overview
Problem
In light-field displays, large angles of image light beams can result in overlapping images, leading to poor image quality due to the stacking of parallax images on the retina, causing ghost images and reduced display quality.
Innovation Solution
An illumination system comprising a light-source module and a light-shape adjustment module, which includes a first light-diffusing element, a second light-diffusing element, and a first lens element, adjusts the light shape of the illumination light beam to provide uniform illumination and reduce overlapping images, improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the angle of the image light beam is increased to provide wider viewing angle, then the viewing angle is improved, but overlapping images and ghost images are generated leading to poor image quality
Solution Approach 1:
The illumination system is divided into multiple independent light-diffusing elements (first light-diffusing element, second light-diffusing element) and lens elements that work together to segment and control the light beam paths, preventing overlapping images while maintaining wide viewing angle
Solution Approach 2:
Light-diffusing elements are introduced as intermediary components between the light source and the display element to diffuse and redirect light beams, preventing direct overlapping of images while preserving the wide viewing angle capability
2Manufacturing precision
If uniform illumination is provided to each image unit, then image quality is improved, but the light-shape adjustment module becomes more complex
Solution Approach 1:
Multiple light-diffusing elements and lens elements are merged into a single integrated light-shape adjustment module that performs multiple functions (diffusion, focusing, uniformization) simultaneously, achieving uniform illumination without proportionally increasing system complexity
Solution Approach 2:
The optical parameters (focal length, curvature, material properties) of the lens elements and light-diffusing elements are optimized to achieve uniform illumination distribution with minimal complexity in the overall module structure
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 effectively reduces overlapping images and enhances image display quality by ensuring sufficient and uniform illumination to each image unit, improving the overall quality of the light-field display.
Implementation Method 1
The light-shape adjustment module includes a first light-diffusing element, a second light-diffusing element, and a first lens element. The first light beam sequentially passes through the first light-diffusing element, the first lens element, and the second light-diffusing element
Implementation Method 2
The first light beam sequentially passes through the first light-diffusing element, the first lens element, and the second light-diffusing element to form the illumination light beam
Data Source
AI summary
An illumination system is adapted to provide an illumination light beam. The illumination system includes a light-source module and a light-shape adjustment module. The light-source module is adapted to emit a first light beam. The light-shape adjustment module is disposed on the transmission path of the first light beam and is adapted to adjust the light shape of the first light beam. The light-shape adjustment module includes a first light-diffusing element, a second light-diffusing element, and a first lens element. The first light beam sequentially passes through the first light-diffusing element, the first lens element, and the second light-diffusing element to form the illumination light beam. A projection device having the illumination system is also provided.