Rotation Wheel Illumination System for High Brightness Projection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional projection apparatuses rely on ultra-high pressure (UHP) lamps, which are being phased out due to environmental concerns, and current LEDs cannot match the brightness of UHP lamps, limiting their replacement potential.
Innovation Solution
An illumination system using a first light source, a rotating wheel with transmissive and reflective regions, and a phosphor element to split and excite a color beam, combined with a light combining element to achieve high brightness, incorporating a second light source to enhance color mixing and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If UHP lamps are used as light source, then high brightness is achieved, but environmental harm increases due to mercury content
Solution Approach 1:
The patent changes the light source parameter from UHP lamp to LED, and introduces a phosphor conversion mechanism to change the wavelength parameter. The LED emits blue light which excites the phosphor to produce yellow light, achieving the desired brightness spectrum without mercury
Solution Approach 2:
The patent introduces a phosphor element as an intermediary between the LED and the final light output. The phosphor converts the blue LED light to yellow light through photoluminescence, serving as a mediator to achieve the required spectral output while maintaining environmental safety
2Object-generated harmful factors
If LED is used as light source, then environmental friendliness is improved, but brightness is insufficient compared to UHP lamps
Solution Approach 1:
The patent changes the wavelength parameter by using a phosphor element that converts blue LED light to yellow light. This parameter transformation enables the LED system to achieve brightness levels comparable to UHP lamps while maintaining environmental friendliness
Solution Approach 2:
The patent employs a composite light generation system combining LED and phosphor materials. The phosphor layer acts as a composite material that absorbs blue light and emits yellow light, creating a composite light source that achieves both environmental sustainability and high brightness
3Illumination intensity
If a rotation wheel with transmissive and reflective regions is used to split and combine beams, then color mixing and brightness are improved, but device complexity increases
Solution Approach 1:
The patent employs a rotating wheel with transmissive and reflective regions that dynamically switches between different optical paths. The rotation creates time-varying optical characteristics, allowing a single component to perform multiple functions in sequence, thereby managing complexity through dynamic operation
Solution Approach 2:
The rotation wheel serves multiple functions: it acts as a beam splitter, a color separator, and a light combiner at different rotational positions. This multi-functionality reduces the need for separate components, managing system complexity while achieving superior color mixing and brightness
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 system achieves high brightness, enabling projection apparatuses to produce images with improved luminosity, overcoming the limitations of current LED technology and aligning with environmental sustainability goals.
Implementation Method 1
one of the first color transmissive beam and the first color reflective beam excites the first phosphor element to form a second color beam
Data Source
AI summary
An illumination system includes a first light source, a first rotation wheel, a first phosphor element, and a light combining element. The first light source is capable of emitting a first color beam. The first rotation wheel is disposed on a transmission path of the first color beam and includes a first transmissive region and a first reflective region. The first transmissive region is capable of allowing the first color beam to pass through so as to form a first color transmissive beam. The first reflective region is capable of reflecting the first color beam to form a first color reflective beam. One of the first color transmissive and reflective beams excites the first phosphor element to form a second color beam. The light combining element combines the second color beam and a beam originating from the other one of the first color transmissive and reflective beams.