Video Projection Window with Dynamic Optical Switching
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Solution Overview
Problem
Existing video projecting screens face challenges in achieving high video visibility without degrading background visibility, particularly in environments with external light, and struggle to balance video display with transparency.
Innovation Solution
A video projecting structure with a transmittance of 5-90%, reflectivity of 5-70%, and front haze of ≤20, featuring a transparent substrate with a first transparent layer having random irregularities and a reflection film, allowing for high video visibility while maintaining background transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transmitting type screen is used to allow rear side viewing, then background visibility is improved, but video visibility deteriorates because video light cannot be effectively displayed
Solution Approach 1:
The screen dynamically changes its optical properties based on projection mode. During video projection, the screen surface becomes reflective to enhance video visibility. When not projecting, it returns to a transmitting state for background viewing. This dynamic switching resolves the contradiction between video display quality and background transparency.
Solution Approach 2:
The screen modifies its reflectivity and transmittance parameters depending on the operating mode. By adjusting these optical parameters, the screen can optimize for either video projection or background viewing, resolving the contradiction between these two opposing requirements.
2Reliability
If a reflection type screen is used to display video, then video visibility is improved, but background visibility deteriorates because the screen blocks light from the rear side
Solution Approach 1:
The screen dynamically switches between reflective mode for video projection and transmitting mode for background viewing. This dynamic behavior allows the screen to provide high video visibility when needed while maintaining background transparency at other times, resolving the contradiction.
Solution Approach 2:
The optical parameters of the screen (reflectivity and transmittance) are changed based on the operating mode. During projection, reflectivity is enhanced for video visibility. When not projecting, transmittance is restored for background viewing, resolving the contradiction between video display and background transparency.
3Reliability
If irregularities are formed on the screen surface to enhance video display, then video visibility is improved, but manufacturing precision deteriorates due to the complexity of forming and burying irregularities
Solution Approach 1:
The irregularities are pre-formed on a substrate before the screen is assembled. This preliminary action simplifies the manufacturing process by separating the irregularity formation step from the screen assembly step, reducing the overall manufacturing precision requirements while maintaining video display quality.
Solution Approach 2:
A separate substrate layer is used as an intermediary to carry the irregularities. This substrate acts as a mediator between the irregularity formation process and the final screen structure, allowing irregularities to be formed with relaxed precision requirements while still achieving the desired video display效果.
4Illumination intensity
If transmittance is increased to improve background visibility, then background visibility is improved, but video visibility deteriorates due to insufficient video light reflection
Solution Approach 1:
The screen dynamically adjusts its transmittance and reflectivity based on the operating mode. During video projection, reflectivity is enhanced while transmittance is reduced to improve video visibility. When not projecting, transmittance is increased for background viewing, resolving the contradiction between these two parameters.
Solution Approach 2:
The optical parameters (transmittance and reflectivity) are changed based on operating conditions. The screen can switch between high transmittance mode for background viewing and high reflectivity mode for video projection, resolving the contradiction between background visibility and video visibility.
5Reliability
If reflectivity is increased to improve video visibility, then video visibility is improved, but background visibility deteriorates due to reduced light transmission
Solution Approach 1:
The screen dynamically switches between high reflectivity mode for video projection and high transmittance mode for background viewing. This dynamic switching allows the screen to optimize for video visibility when needed while maintaining background transparency at other times, resolving the contradiction.
Solution Approach 2:
The reflectivity and transmittance parameters are adjusted based on the operating mode. During projection, reflectivity is increased for video visibility. When not projecting, transmittance is increased for background viewing, resolving the contradiction between video display quality and background transparency.
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 structure achieves high video visibility without compromising background visibility, even in bright environments, by optimizing transmittance, reflectivity, and haze levels, ensuring clear projection and transparency.
Implementation Method 1
a first transparent layer 21 having random irregularities 21a formed on its surface
Implementation Method 2
a reflection film 30 provided on the surface of the first transparent layer 21 on which the random irregularities 21a are formed
Data Source
Figure 1~2
Figure 3~3(c)
Figure 4~5
AI summary
[Problem] Provide a video projecting window structure achieving high visibility of a projected video without degrading the visibility of a background image that can be seen through the video projecting window structure. [Means for solving Problem] A video projecting structure includes a substrate having a visible light transmittance greater than or equal to 5% and less than or equal to 90%, a reflectivity greater than or equal to 5% and less than or equal to 90%, and a front haze less than or equal to 30.