Multi-Film Optical Filter for 3D Display Illumination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical filters used in display devices are inefficient in directing and concentrating illumination, often requiring high illumination power and not capable of providing three-dimensional images without additional filtering devices.
Innovation Solution
The development of an optical filter comprising multiple films with different indices of refraction, which are connected and configured to direct light efficiently, allowing for the projection of three-dimensional images by orienting films parallel to the light path and using cameras to track eye positions for precise light delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional optical filters are used in display devices, then the device can display images, but the illumination power requirement is high and image delivery efficiency is low
Solution Approach 1:
The optical filter is divided into multiple discrete films (first film, second film, third film) with different indices of refraction, each contributing to specific wavelength filtering. This segmentation allows precise control of light transmission characteristics, improving image delivery efficiency while reducing the need for high illumination power.
Solution Approach 2:
The patent uses a composite structure of multiple films with different optical properties (different indices of refraction) to create an optical filter system that achieves superior performance in both energy efficiency and image delivery compared to traditional single-material filters.
2Adaptability or versatility
If traditional optical filters are used, then the device can provide image display, but it cannot provide three-dimensional images without additional filtering devices
Solution Approach 1:
The multi-film optical filter structure performs multiple functions simultaneously: it filters specific wavelengths and enables three-dimensional image projection without requiring separate filtering devices. The different indices of refraction in each film allow the system to handle both standard and stereoscopic display requirements with a single integrated component.
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 solution reduces illumination power requirements by up to 20% and enables the projection of three-dimensional images without the need for glasses or additional filters, improving image delivery efficiency and reducing power consumption.
Implementation Method 1
The upper surface of the first film has a first index of refraction and the lower surface of the first film has a second index of refraction. The first index of refraction is different than the second index of refraction.
Implementation Method 2
One example of an optical filter is a Bragg reflective grating. Bragg reflective gratings have been used in, for example, optical fibers. A fiber Bragg grating may be used to reflect wavelength-specific light.
Data Source
AI summary
An optical filter includes a first film having an upper surface, a lower surface, a first side, and a second side. A second film is included that has an upper surface, a lower surface, a first side, and a second side. A third film is included that has an upper surface, a lower surface, a first side, and a second side. The first side of the first film is connected to the second side of the second film. The first side of the second film is connected to the second side of the third film. The lower surface of the first film is optically adjacent to the upper surface of the second film. The lower surface of the second film is optically adjacent to the upper surface of the third film. Methods of manufacture and use are also described.