Reflective Screen with Unit Optical Shapes for Flexible Installation
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Solution Overview
Problem
Existing semi-transparent reflective screens require precise alignment with image sources, limiting their installation flexibility and image display quality due to strict positioning requirements for effective image light deflection.
Innovation Solution
A reflective screen design featuring an optical shape layer with unit optical shapes and a reflective layer that allows for greater positional freedom, incorporating a light diffusing action in the direction of unit optical shape arrangement, with a half-value angle greater than orthogonal directions, and a surface structure that includes fine uneven shapes for enhanced light diffusion and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a Fresnel lens shape is used to deflect image light, then the image light deflection effect is improved, but the installation flexibility is reduced due to strict positioning requirements
Solution Approach 1:
The optical shape layer is divided into multiple unit optical shapes (e.g., prisms or lenses) arranged in an array pattern. Each unit independently deflects light, collectively achieving the desired light distribution without requiring precise alignment of a single large Fresnel lens. This segmentation allows for greater installation flexibility while maintaining effective image light deflection.
Solution Approach 2:
The invention changes the geometric parameters of the unit optical shapes (such as prism angles, lens curvatures, or spacer dimensions) to control light deflection characteristics. By adjusting these parameters, the system achieves effective image light deflection over a wider range of installation positions, reducing the need for strict positioning requirements.
2Manufacturing precision
If the reflective screen is positioned close to the image source, then the image display quality is improved, but the installation flexibility is reduced
Solution Approach 1:
The optical shape layer is divided into multiple unit optical shapes (e.g., prisms or lenses) arranged in an array pattern. Each unit independently deflects light, collectively achieving the desired light distribution without requiring precise alignment of a single large Fresnel lens. This segmentation allows for greater installation flexibility while maintaining effective image light deflection.
Solution Approach 2:
The invention introduces a dimensional approach by arranging unit optical shapes in a two-dimensional array pattern rather than relying on a single three-dimensional Fresnel lens structure. This array configuration allows the system to achieve effective light deflection and image display quality across a broader range of relative positions between the reflective screen and image source, thereby increasing installation flexibility.
3Adaptability or versatility
If a semi-transparent reflective screen is used, then the designability is improved, but the image recognition quality may be reduced
Solution Approach 1:
The reflective layer is selectively positioned on specific regions of the unit optical shapes rather than uniformly across the entire surface. This local placement optimizes the reflection of image light toward the observer while maintaining optical transparency in other areas, thereby preserving both design flexibility and image recognition quality.
Solution Approach 2:
The invention changes the geometric parameters of the unit optical shapes (such as prism angles, lens curvatures, or spacer dimensions) to control light deflection characteristics. By adjusting these parameters, the system achieves effective image light deflection over a wider range of installation positions, reducing the need for strict positioning requirements.
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 a high degree of freedom in positioning the reflective screen relative to the image source while maintaining good image display quality and transparency, allowing for effective image light deflection and reduced glare from the image source.
Implementation Method 1
an optical shape layer (12) that has optical transparency and a plurality of unit optical shapes (121) arranged on a rear surface side
Implementation Method 2
a reflective layer (13) that is provided on at least part of each unit optical shape (121) to reflect some of incident light and transmit at least some of the remaining incident light
Implementation Method 3
a light diffusing action in a direction in which the unit optical shapes (121) are arranged is greater than a light diffusing action in directions orthogonal to the arrangement direction
Data Source
AI summary
This reflective screen 10 reflects a part of image light beam projected from an image source LS, to display an image. The reflective screen 10 is provided with: a first optical shape layer 12 which has optical transparency and has a plurality of unit optical shapes 121 arranged on a rear surface thereof; and a reflective layer 13 which is formed in at least some of the unit optical shapes 121 and by which a part of incident light is reflected and at least the other part of the incident light is transmitted, wherein a light diffusing action in the direction in which the unit optical shapes 121 are arranged is larger than a light diffusing action in a direction perpendicular to the arrangement direction.