Transparent Screen Slant Reflective Surfaces Hot Spot Elimination
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Solution Overview
Problem
Conventional transparent screens suffer from a 'hot spot' phenomenon where the central portion shines brightly due to regular reflection of incident light, causing uneven brightness when observing a video, with no direction allowing the entire video to be observed brightly.
Innovation Solution
A transparent screen design featuring a first transparent layer with slant reflective surfaces, each with a concavo-convex shape in a stripe pattern, where the angles of these surfaces vary randomly within a certain range, allowing the separation of hot spot and bright video observation directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflective layer is formed on a flat surface of the first transparent layer, then the video can be reflected clearly, but a hot spot phenomenon occurs in the central portion due to regular reflection
Solution Approach 1:
The reflective layer is divided into multiple local regions with different reflective properties. Each region has slant reflective surfaces oriented at different angles, creating localized reflection patterns that collectively eliminate the hot spot while maintaining video brightness. The concavo-convex structure further divides each local region into micro-facets with varying reflection characteristics.
Solution Approach 2:
The slant reflective surfaces are designed with asymmetric angular distributions rather than uniform orientation. The angles of the slant reflective surfaces change with random variations within a certain range, creating an asymmetric reflection pattern that directs intense light away from the observer's direction while maintaining overall video visibility.
2Loss of energy
If the reflective layer uses regular reflection surfaces, then the reflection efficiency is high, but the direction of hot spot observation and bright video observation cannot be separated
Solution Approach 1:
The reflective layer is segmented into multiple slant reflective surfaces with different orientations. Each segment reflects light in a different direction, collectively covering a wide angular range. This segmentation allows the system to maintain high overall reflection efficiency while providing flexibility in observation directions by distributing reflected light across multiple paths.
Solution Approach 2:
The reflective layer incorporates random variations in the angles of slant reflective surfaces, creating a dynamic-like distribution of reflection directions. This random angular distribution adapts to different viewing conditions, allowing observers to view the video brightly from various directions while the hot spot direction remains separated.
3Object-affected harmful factors
If slant reflective surfaces with random angle variations are used, then hot spot and bright video directions are separated, but the manufacturing complexity increases
Solution Approach 1:
The manufacturing process utilizes self-organizing mechanisms where the slant reflective surfaces with random angle variations are formed through a process that automatically achieves the desired angular distribution. The system self-adjusts to create the complex angular pattern without requiring precise manual control of each surface angle, reducing manufacturing complexity while maintaining the hot spot elimination effect.
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 observation of a video without hot spots, ensuring uniform brightness across the screen by directing intense light away from the observer's view, thus providing a direction where the video can be wholly observed brightly.
Implementation Method 1
a reflective layer reflecting projected video light... the reflective layer has a plurality of slant reflective surfaces... each of the slant reflective surfaces being provided with a concavo-convex
Data Source
AI summary
There is provided a transparent screen which is capable of separating a direction where a hot spot is observed and a direction where a bright video is allowed to be observed, and establishing a direction where a video is allowed to be wholly brightly observed.A transparent screen includes a first transparent layer, a reflective layer reflecting projected video light, a second transparent layer disposed opposite to the first transparent layer with respect to the reflective layer so as to make a background visible therethrough; wherein the reflective layer has a plurality of slant reflective surfaces, each of the slant reflective surfaces being slant to a reference surface that is a surface of the first transparent layer opposite to the reflective layer; wherein each of the slant reflective surfaces is provided with a concavo-convex and is formed in a stripe shape when seen from a normal direction of the reference surface; and wherein the slant reflective surfaces are disposed so as to have angles to the reference surface, the angle changing with random variations in of range with respect to a certain central angle.