Projector UV/IR Filter Tilt Angle for Heat Management
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Solution Overview
Problem
Conventional projectors suffer from high temperatures in the light source due to reflected UV and IR radiation, which damages the light source and affects display performance.
Innovation Solution
A projector design that includes a UV/IR filter tilted between 13 degrees to 30 degrees and a transparent wedge-shaped structure or tilt surface to redirect reflected invisible and visible light beams away from the light source, preventing heat buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional projector uses a light source with UV/IR filter and color wheel, then the projector can generate colored light beams for display, but the reflected UV and IR radiation and visible light beam cause high temperature at the light source leading to damage and reduced display performance
Solution Approach 1:
The patent extracts the harmful reflected radiation (UV and IR) from the optical path by introducing a UV/IR filter that selectively blocks these wavelengths. The filter is positioned to intercept reflected radiation before it reaches the light source, effectively removing the harmful thermal component while allowing the useful visible light to pass through to the projection lens.
Solution Approach 2:
The UV/IR filter acts as an intermediary element between the light source and the projection lens. It mediates the optical path by selectively transmitting visible light while blocking UV and IR radiation, thereby protecting the light source from thermal damage while maintaining the display function.
2Temperature
If the UV/IR filter is positioned at a specific tilt angle, then the reflected radiation can be effectively redirected away from the light source, but the filter occupies space and adds structural complexity
Solution Approach 1:
The patent optimizes the tilt angle parameter of the UV/IR filter to achieve effective radiation redirection. By adjusting the filter's angular orientation, the reflected UV and IR radiation is directed away from the light source while maintaining a compact device structure. This parameter optimization balances thermal protection with structural simplicity.
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
Effectively prevents damage to the light source by redirecting reflected radiation, maintaining the projector's display performance and extending the life of the light source.
Implementation Method 1
The UV/IR filter 6 transmits a visible light beam of the light beam and reflects an ultraviolet (UV) and an infrared radiation (IR) of the light beam
Implementation Method 2
The UV/IR filter 6 transmits a visible light beam of the light beam
Implementation Method 3
The color wheel 8 comprises different filters for several primary colors, such as red, green and blue. While the color wheel 8 rotates, a primary color light beam of the light beam passes through the color wheel 8 in a predetermined time section, and the other color light beam of the light beam is reflected by the color wheel 8
Implementation Method 4
a primary color light beam of the light beam passes through the color wheel 8
Implementation Method 5
The means for guiding the light beam reflected by the color wheel toward directions away from the light source further guide a invisible light beam of the light beam reflected from the UV/IR filter toward directions away from the light source
Data Source
AI summary
A projector comprises a light source, an Ultraviolet/Infrared Radiation (UV/IR) filter, a color wheel and means for guiding the light beam reflected by the color wheel toward directions away from the light source. The light source is for providing a light beam. The UV/IR filter is disposed with a tilt angle ranging from 13 degrees to 30 degrees. The color wheel for receiving the light beam transmits a primary color light beam of the light beam in a predetermined time section, and the other color light beam of the light beam is reflected by the color wheel. The means for guiding the light beam reflected by the color wheel toward directions away from the light source further guide a invisible light beam of the light beam reflected from the UV/IR filter.