Artificial Fireplace Optics for Realistic Flame Depth
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Solution Overview
Problem
Existing artificial fireplaces lack the ability to effectively simulate the natural appearance and effects of a burning fire, particularly in terms of flame and fuel effects, limiting their realism and depth perception.
Innovation Solution
The use of a dichroic mirror to reflect a background image and flame images into the viewer's line of sight, combined with a mask for optimal transparency and internal light sources for illumination, along with a control system for synchronized lighting and audio, creates a more realistic and immersive fire simulation within a compact housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the imaging means is placed behind the dichroic mirror and the background image means is placed in front, then the box requires less depth and greater viewing angles are achieved, but the device complexity increases due to the optical configuration
Solution Approach 1:
The patent uses a dichroic mirror to merge the background image layer and flame image layer in the optical path, effectively utilizing the depth dimension to create a three-layer structure (background, flames, fuel bed) that projects onto a two-dimensional viewing plane. This dimensional manipulation allows the fireplace to achieve realistic depth perception while maintaining a compact physical depth.
Solution Approach 2:
The dichroic mirror serves as an intermediary optical element that selectively reflects certain wavelengths of light while transmitting others. It mediates between the background image source and the flame image source, combining their images in a way that creates the illusion of depth and realism without requiring a deep physical structure.
2Reliability
If real-life objects such as woodblocks or stones are provided in front of the generated flames, then a more natural impression is achieved, but the device complexity increases due to additional components
Solution Approach 1:
The patent applies different visual qualities to different regions of the display: the background layer provides the fireplace environment, the mid-layer displays dynamic flame patterns with varying intensity and color, and the foreground layer presents static or slowly moving fuel bed elements. This local differentiation of visual characteristics enhances the overall realism without requiring a uniformly complex structure throughout.
3Reliability
If a mask with non-regular optical transparency is provided between the imaging means and the dichroic mirror, then the artificial flame effect is optimized, but the manufacturing precision requirements increase
Solution Approach 1:
The mask is designed with spatially varying optical transparency that modulates the intensity and distribution of light from the flame image source. By creating a non-uniform transparency pattern, the mask simulates the natural variation in flame brightness and density, enhancing the realism of the artificial fire effect while working within the constraints of the optical system.
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
This configuration enhances the realism of the fire simulation, allowing for greater viewing angles and a natural impression of burning wood or stones, while reducing the depth of the fireplace and enabling a more immersive experience with enhanced visual and auditory effects.
Implementation Method 1
A means for showing an image of the background is placed in front of the dichroic mirror and configured such that the background image is reflected by the mirror into the line of sight of the viewer
Data Source
AI summary
An artificial fireplace comprising a screen and a fuel bed portion. An optical element is provided which is configured to transpose an image of one of the screen and fuel bed to create the impression of a burning fire.