Transparent Screen with Louver Absorbers for Reflection Control
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Solution Overview
Problem
Conventional transparent screens that prioritize transparency often result in the generation of unnecessary images due to specularly reflected light, which can dazzle observers and reveal the projected nature of the image, especially when image light is projected at wide angles from ceilings or footings, leading to offensive reflections on ceilings and footings.
Innovation Solution
A transparent screen system comprising a first transparent base material with diffusion microparticles, a second transparent base material with light absorption materials arranged in a louver structure, and a transparent adhesive layer, which diffuses image light and transmits background light rectilinearly, inhibiting the generation of unnecessary images by controlling the incidence angle and absorption of light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If image light is projected at wide angles from ceilings or footings to achieve broad coverage, then the area of image display is improved, but specularly reflected light creates dazzling unnecessary images that reduce observation quality
Solution Approach 1:
The patent converts the harmful specular reflection into a beneficial effect by using a diffusion member that transforms the concentrated reflected light into diffused light. The diffusion member scatters the specularly reflected image light, preventing dazzling reflections while maintaining image visibility, thus turning the harmful reflection into a useful diffused display effect.
Solution Approach 2:
The diffusion member acts as an intermediary between the projector and the observer. It receives the specularly reflected image light and transforms it into diffused light before reaching the observer's eye, thereby eliminating the harmful dazzle effect while preserving the image information for legitimate viewing.
2Reliability
If a transparent screen transmits background light rectilinearly to maintain transparency, then background visibility is improved, but transmitted image light creates unnecessary images on ceilings and footings
Solution Approach 1:
The patent extracts the harmful transmitted image light from the system by using a light absorption member that selectively absorbs the image light transmitted through the transparent screen. This prevents the formation of unnecessary images on ceilings and footings while maintaining the screen's transparency for background visibility.
Solution Approach 2:
The light absorption member is positioned specifically on the background side of the transparent screen, creating a localized function to absorb transmitted image light. This localized intervention selectively removes the harmful transmitted light without affecting the overall transparency and background visibility function of the screen.
3Reliability
If diffusion microparticles are distributed in very small amounts to maintain transparency, then background light transmission is improved, but image light diffusion efficiency decreases
Solution Approach 1:
The patent uses a composite structure combining transparent resin material with diffusion microparticles and light absorption materials. This composite material achieves both transparency for background light and effective diffusion for image light by combining multiple functional components working together synergistically.
Solution Approach 2:
The patent changes the parameters of light interaction by introducing both diffusion microparticles (to scatter image light) and light absorption materials (to absorb transmitted image light). This dual-parameter approach optimizes both transparency and image diffusion efficiency by controlling different aspects of light behavior.
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 system effectively prevents the formation of distracting images on ceilings and footings, allowing observers to view images without recognizing them as projected, while maintaining clear background visibility and reducing luminance issues.
Implementation Method 1
a diffusion member, which diffuses the image light
Implementation Method 2
a plurality of light absorption materials, which are disposed within the second base material
Implementation Method 3
transmitting part of incident light rectilinearly
Data Source
AI summary
A transparent screen is a transparent screen for diffusing image light projected from a projector and displaying an image by transmitting part of incident light rectilinearly and diffusing the other part of the incident light. The transparent screen includes a first base material that is transparent, a diffusion member, a second base material that is transparent, and a plurality of light absorption materials. The diffusion member is disposed within a first base material and diffuses the image light. The second base material is disposed on an opposite side of the first base material from the projector. The plurality of light absorption materials is disposed within the second base material and is arranged parallel to each other along an arrangement direction parallel to a principal plane of the second base material.