Air Floating Video Display Light Source Divergence Control
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Solution Overview
Problem
Existing air floating video information display systems lack an optimization technique for the light source design, resulting in reduced visibility and increased erroneous detection in three-dimensional operations.
Innovation Solution
The system incorporates a video display apparatus with a light source apparatus that includes optical means to reduce the divergence angle of light and a retroreflector to display an air floating video as a real image in the air, while a first ranging apparatus with TOF systems senses the space to minimize erroneous detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is used in the air floating video display apparatus, then the video can be displayed, but the divergence angle of light is large resulting in reduced visibility and visual resolution
Solution Approach 1:
A light guide plate is introduced as an intermediary component between the light source and the display medium. The light guide plate receives light from the light source and guides it to the display medium, effectively controlling the light path and reducing divergence angle while maintaining illumination intensity for high visibility
Solution Approach 2:
The patent changes the physical parameters of the light guide plate including its thickness, refractive index, and surface characteristics to optimize light transmission and control divergence angle. By adjusting these parameters, the system achieves both high visibility and reduced light divergence
2Illumination intensity
If the light source apparatus is added to improve video display quality, then visibility is improved, but the device complexity increases
Solution Approach 1:
The light guide plate serves multiple functions simultaneously: it guides light from the light source, controls the divergence angle, provides structural support, and acts as a mounting substrate for the display medium. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
Solution Approach 2:
The patent combines the light guiding function, structural support function, and display medium mounting function into a single integrated light guide plate assembly. This merging of functions simplifies the overall device structure compared to having separate components for each function
3Ease of operation
If the retroreflector is used to display air floating video, then the video can be projected in air, but erroneous detection in three-dimensional operation increases
Solution Approach 1:
The retroreflector is divided into multiple segmented elements or zones rather than using a single continuous reflective surface. This segmentation allows different regions to reflect light in controlled patterns, reducing spurious reflections that cause erroneous detection while maintaining the air floating video display capability
Solution Approach 2:
Different regions of the retroreflector are designed with different reflective properties or orientations tailored to their specific functions. This local quality variation optimizes the reflection pattern in each zone, improving three-dimensional operation detection accuracy by reducing unwanted reflections from specific areas
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 configuration enables highly accurate three-dimensional operation with high visibility and reduced erroneous detection, improving the overall performance of the air floating video information display system.
Implementation Method 1
a retroreflector configured to reflect a video light from the video display apparatus to display an air floating video that is a real image in air by the reflected light
Implementation Method 2
a first ranging apparatus in which a plurality of TOF (Time Of Flight) systems each having a light source and a light receiver are arranged in a matrix
Data Source
AI summary
An air floating video display system contributes to Sustainable Development Goals 3, 9 and 11. The air floating video display system includes a video display apparatus configured to display a video, a light source apparatus, and a retroreflector configured to reflect a video light from the video display apparatus to display an air floating video that is a real image in air by the reflected light. The light source apparatus includes optical means configured to reduce a divergence angle of a light from a point or surface light source and a reflection surface configured to reflect the light from the light source to propagate it to the video display apparatus, and a part of the divergence angle of the light flux emitted from the light source is adjusted by a shape and surface roughness of the reflection surface provided on the light source.