Reflecting Screen With Alternating Prism And Absorbing Portions
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Solution Overview
Problem
Conventional reflecting screens face challenges in achieving high contrast and brightness images while minimizing strong shining, and their manufacturing processes are complex, leading to increased costs.
Innovation Solution
A reflecting screen design featuring light transmitting and light absorbing portions alternately extending along the screen face, with a reflecting layer on the rear face of the light transmitting portions, and micro-beads in the light absorbing portions to absorb natural light, along with an anti-regular-reflection layer to reduce regular reflection components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional reflecting screens use complex manufacturing steps to achieve high contrast and brightness, then image quality is improved, but manufacturing cost increases
Solution Approach 1:
The screen is divided into alternating light transmitting portions and light absorbing portions along the screen face. The light transmitting portions are further segmented into unit prism-shaped portions with wedge-like cross-sections. This segmentation allows simple manufacturing of individual components that can be easily assembled, while achieving complex optical functions including high contrast and brightness without requiring complex overall manufacturing processes.
Solution Approach 2:
Different regions of the screen have different optical properties: light transmitting portions with reflecting layers for high brightness, and light absorbing portions for contrast enhancement. The wedge-like unit prism portions have specific refractive index characteristics that create local optical effects. This local differentiation of properties is achieved through simple material selection and arrangement rather than complex manufacturing.
2Object-affected harmful factors
If reflecting screens use sawtoothed cross sections with separately formed reflecting and light absorbing faces, then light control is improved, but manufacturing difficulty increases
Solution Approach 1:
The light transmitting portions and light absorbing portions are integrated into a single unified structure with alternating arrangement along the screen face. The unit prism-shaped portions are formed as integral parts of the screen assembly, eliminating the need to separately form reflecting faces and light absorbing faces on different components. This merging simplifies manufacturing while maintaining effective light control through the alternating pattern.
Solution Approach 2:
The alternating arrangement of light transmitting and light absorbing portions serves multiple functions simultaneously: it controls natural light reflection, enhances image contrast, and maintains structural integrity as a single assembly. The wedge-like unit prism portions provide both light transmission and geometric structure in a single component, reducing manufacturing steps.
3Illumination intensity
If reflecting screens use light transmitting diffusion layers and Fresnel lenses, then light reflection is improved, but surface strong shining occurs
Solution Approach 1:
The harmful surface strong shining is eliminated by extracting or removing the light reflecting diffusion layer and Fresnel lens from the screen structure. Instead, the invention uses simple light transmitting portions with reflecting layers positioned at specific locations (rear faces of unit prism portions) to achieve light reflection without the surface shining problems associated with diffusion layers and Fresnel lenses.
Solution Approach 2:
The invention replaces complex, expensive diffusion layers and Fresnel lenses with simple, inexpensive light transmitting portions that have reflecting layers on their rear faces. These simple unit prism-shaped portions achieve the same light reflection function without the harmful surface shining effects, providing a cost-effective solution.
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 design achieves high contrast and brightness images with reduced shining and simplifies the manufacturing process, enabling efficient light reflection and absorption, thus providing a cost-effective solution.
Implementation Method 1
light absorbing portions adapted to absorb light
Implementation Method 2
a reflecting layer adapted to reflect the image light, which has been transmitted through the light transmitting portions, is provided at least on the rear face side of each light transmitting portion
Implementation Method 3
each of the light absorbing portions comprises micro-beads adapted to absorb light
Implementation Method 4
an anti-regular-reflection layer to reduce regular reflection components
Data Source
AI summary
A reflecting screen 10 comprises a base portion 11, light transmitting portions 12 provided on the base portion 11, and light absorbing portions 14. Each of the light transmitting portions 12 comprises a unit prism shape 12 which has a generally wedge-like shape with a larger width on the image source side than its width on the rear face side and is arranged along a screen face 10a. A reflecting layer 13 adapted to reflect the image light, which has been transmitted through the unit prism shapes 12, is provided on the rear face side of each unit prism shape 12. Each unit prism shape 2 extends linearly, and each light absorbing portion 14 is arranged between each adjacent pair of the unit prism shapes 12.