Display Device Plenum Chamber Optical Particle Diffusion
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Solution Overview
Problem
Display devices using high-powered light sources often cause dazzling due to direct light intensity, and solutions like optical filters attenuate light, rendering high-powered sources inefficient.
Innovation Solution
A display device design featuring a body member with transparent plenum chambers filled with optical particles, such as glass balls, which diffuse light from light-emitting sources, reducing direct visibility of LEDs and maintaining light intensity by ensuring the particles are a pressurized mass for uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If high-powered light sources are used to increase light output efficiency, then energy efficiency is improved, but dazzling effect increases causing harmful viewing conditions
Solution Approach 1:
The patent introduces an intermediary medium (diffusing material or optical elements) between the high-powered light source and the viewer. This intermediary scatters and redistributes the light rays, maintaining the high energy efficiency of the light source while eliminating the direct line-of-sight to the intense light, thereby resolving the contradiction between efficiency and dazzling effect
Solution Approach 2:
The light output is segmented or divided into multiple directional paths through the use of diffusing elements or optical structures. Instead of a single intense beam, the light is broken into numerous smaller rays distributed across different angles, which maintains total light output while preventing concentrated dazzling effects in any single viewing direction
2Object-affected harmful factors
If optical filters are used to reduce dazzling effect, then viewing comfort is improved, but light output is attenuated reducing energy efficiency
Solution Approach 1:
Instead of filtering out unwanted light (subtractive approach), the patent uses a diffusing medium that redistributes the existing light in all directions (additive/distributive approach). This inversion of the problem-solving approach maintains nearly 100% of the light output while achieving the same dazzling reduction effect, as the light is not blocked but rather redistributed away from direct viewing angles
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 solution effectively reduces dazzling effects while maintaining light intensity, providing a uniformly bright surface appearance without significant light attenuation, suitable for various applications including decorative and signaling uses.
Implementation Method 1
a first plenum chamber having a filling of optical particles such as chips or balls of glass; the carrier serving to load the second transparent member by way of the spacing means so that the filling is maintained as a pressurised mass of particles
Data Source
AI summary
A display device comprising a body for housing first and second transparent members and a carrier that supports sources of light. The first member is spaced from the second member such that a first plenum chamber is formed between the first and second members. The carrier is spaced from the second member on a side of the second member opposite the first chamber such that a second plenum chamber is formed between the second member and the carrier. A spacer separates the carrier from the second member by a predetermined amount. The sources of light being directed at the first and second members and the first and second chambers. The first chamber is filled with optical particles to diffuse the light passing through. The carrier applies a load, via the spacer, on the second member such that the particles are maintained at a pressure.