Retroreflective Element Segmentation for Display Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices that form images in air face challenges in maintaining resolution due to the retroreflective properties of retroreflective elements, which can affect the accuracy of the image formation process.
Innovation Solution
A display device comprising a display unit, an optical element that transmits and reflects light, and a retroreflective element with retroreflectors and a transmissive portion, where the retroreflective element is strategically positioned to optimize the optical path and reduce the distance of light reflection, thereby improving image resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the retroreflective element is positioned farther from the display unit, then the light reflection angle is reduced, but the optical path length increases causing image resolution degradation
Solution Approach 1:
The retroreflective element is segmented into multiple retroreflectors arranged in a specific pattern, allowing the optical path to be divided and controlled. This segmentation enables the light to reflect through a shorter effective path while maintaining the desired reflection angle, thus improving image resolution without excessively increasing the optical path length.
Solution Approach 2:
The retroreflectors are arranged in a two-dimensional pattern rather than a simple linear arrangement. This dimensional change allows the light to achieve the necessary reflection angle through a more compact spatial configuration, reducing the optical path length while maintaining image quality.
2Length of stationary object
If the retroreflective element is positioned closer to the display unit, then the optical path length is shortened, but the light reflection angle increases causing image formation deviation
Solution Approach 1:
Different regions of the retroreflective element have different retroreflector configurations. By optimizing the local arrangement of retroreflectors in different areas, the light reflection angle is controlled to achieve accurate image formation while maintaining a short optical path length overall.
Solution Approach 2:
The parameters of the retroreflectors (such as their size, shape, and spacing) are optimized to achieve the desired reflection characteristics. By changing these parameters, the system achieves accurate image formation with a shortened optical path.
3Illumination intensity
If the distance between the optical element and retroreflective element is increased, then the light transmission is improved, but the device size increases
Solution Approach 1:
The system allows for dynamic adjustment of the distance between the optical element and retroreflective element, or provides multiple fixed distance configurations. This enables optimization of light transmission while controlling the overall device size through selective positioning.
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 shortens the optical path of display light, enhancing the resolution of the formed image by adjusting the distance between the optical and retroreflective elements, ensuring the image is accurately projected without excessive deviation from the target forming position.
Implementation Method 1
a retroreflective element which retroreflects display light
Implementation Method 2
an optical element which transmits and reflects display light
Data Source
AI summary
According to one embodiment, a display device including a display unit which emits display light, an optical element which includes a first surface on the display unit side, and a second surface on a side opposite to the first surface, and transmits and reflects incident light, and a retroreflective element provided on the first surface side or the second surface side, wherein the retroreflective element includes first and second retroreflectors which retroreflect light made incident through the optical element, and a transmissive portion located between the first retroreflector and the second retroreflector.