Projection Screen With Segmented Optical Regions
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Solution Overview
Problem
Conventional projection screens are limited by their fixed optical characteristics, preventing users from viewing the background from the other side, restricting their usage, such as when used as showcase glass, where displays inside cannot be seen from outside.
Innovation Solution
A projection screen with a substrate having a projection area comprising arrayed optical regions, each corresponding to a pixel, with at least two sub-regions having different optical characteristics like reflective scattering, transmissive scattering, simple transmission, or specular reflection, allowing the screen to function as both front and rear projection screens, enabling background visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional projection screens use fixed optical characteristics (reflective scattering or transmissive scattering), then the projection function is achieved, but the transparency is lost and background viewing is prevented
Solution Approach 1:
The projection screen is divided into multiple optical regions, each with different optical characteristics. Each optical region corresponds to a pixel and contains multiple optical sub-regions with different properties (reflective scattering, transmissive scattering, simple transmission, or specular reflection), allowing independent optimization for different functions.
Solution Approach 2:
The projection screen is designed to perform multiple functions simultaneously: it can serve as both a front projection screen and a rear projection screen, and can function as showcase glass. The multi-optical-characteristic design enables the screen to provide projection capability while maintaining transparency for background viewing, eliminating the need to choose between conflicting functions.
2Adaptability or versatility
If the projection screen is made transparent to allow background viewing, then usage versatility is improved, but the projection display quality deteriorates
Solution Approach 1:
Different regions of the projection screen have different optical characteristics optimized for specific functions. Optical sub-regions with simple transmission provide transparency for background viewing, while optical sub-regions with reflective scattering or transmissive scattering maintain projection display quality. This local differentiation allows both requirements to be satisfied simultaneously without compromise.
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
Enables the projection screen to be used as both front and rear projection screens simultaneously, allowing users to view the background from the other side, enhancing its versatility and application range.
Implementation Method 1
The first optical sub-region has a first optical characteristic of reflective scattering
Implementation Method 2
The first optical sub-region has a first optical characteristic of transmissive scattering
Implementation Method 3
The second optical sub-region has a second optical characteristic of simple transmission
Implementation Method 4
each of them has different optical characteristic such as reflective scattering, transmissive scattering, simple transmission or specular reflection
Data Source
AI summary
A projection screen includes a substrate having a projection area for a projection device to project an image onto the projection area. The projection area includes a plurality of arrayed optical regions, and each pixel of the image corresponding to the at least one optical region. Each of the optical regions includes a first optical sub-region and a second optical sub-region with different optical characteristics, such as reflective scattering, transmissive scattering, simple transmission or specular reflection. The above-mentioned projection screen with the optical characteristics of two or more, for example, can be at the same time as the front projection screen and the rear projection screen, or allows the user to watch background image behind the projection screen. A projection system including the above-mentioned projection screen is also disclosed.