Projection Screen With Toothed Base Membrane For Multi-Angle Images
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Solution Overview
Problem
Conventional projection screens can only project images at a single angle and are prone to wear and tear due to exposed reflection and light-absorbing layers, reducing their lifespan and limiting their ability to resist ambient light.
Innovation Solution
A projection screen design featuring a base membrane with toothed portions and a coating layer where the reflection and light-absorbing layers are positioned behind the membrane, utilizing high reflective materials and black pigment mixed with resin to reflect images and absorb ambient light, respectively, while preventing contact and abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the reflection layer and light-absorbing layer are exposed on the surface of the optical film to enhance brightness and ambient light shielding, then the projection quality is improved, but the layers are prone to wear and tear due to user handling, reducing the lifespan of the projection screen
Solution Approach 1:
The reflection layer and light-absorbing layer are embedded within the optical film structure rather than being exposed on the surface. The optical film acts as a container that houses these functional layers, protecting them from external contact while maintaining their optical properties for brightness and ambient light shielding.
Solution Approach 2:
The optical film serves as an intermediary layer between the user's hands and the delicate reflection and light-absorbing layers. This intermediate structure allows users to interact with the projection screen surface without directly contacting the sensitive functional layers, thereby preventing wear and tear.
2Device complexity
If conventional projection screens use a single projection direction to simplify the structure, then the device complexity is reduced, but the projection angle is limited, reducing adaptability
Solution Approach 1:
The optical film is divided into multiple regions with different optical properties and projection angles. Each segment of the optical film is designed to reflect light at specific angles, enabling the screen to support multiple projection directions simultaneously while maintaining a relatively simple overall structure.
Solution Approach 2:
Different portions of the optical film are assigned different local characteristics, including varying reflection angles and optical properties. This allows each region to optimize for specific projection angles, providing multi-angle capability while keeping the overall device structure simple and manageable.
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 multi-angle image projection while extending the screen's lifespan by protecting the coating layers from user contact and maintaining effective ambient light resistance.
Implementation Method 1
The reflection layer is disposed on the profile of each of the toothed portions for reflecting the light of projected images to users
Implementation Method 2
the light-absorbing layer, formed by mixing resin with a black pigment, can absorb and block the ambient light and make the ambient light unable to be reflected to the users
Implementation Method 3
the profile of each of the toothed portions is formed with a diffusion layer having a surface optical microstructure, through chemical wet etching or physical dry etching, such that the treated optical microstructure surface can make the light achieve a diffuse effect at specific angles
Data Source
AI summary
A projection screen configured to be projected with multi-angle images includes a base membrane and a coating layer. The base membrane includes a body layer and a plurality of toothed portions connected with the body layer. A profile of each of the toothed portions includes at least one first plane and at least one second plane, where the first plane and the second plane each has a reflection angle different from each other, for providing multi-angle images of projection. The coating layer includes a reflection layer and a light-absorbing layer, where the reflection layer is disposed on the profile of each of the toothed portions; whereas the light-absorbing layer is disposed on the reflection layer, such that, as viewed from a projection position, the coating layer is disposed behind the base membrane. Thereby, the projection screen not only can provide multi-angle images of projection under the circumstance of maintaining the capability of resisting ambient light, but also can prevent the coating layer from contact and abrasion by human behaviors when in use, and as such, the life of use can be prolonged.