Curved-Surface Wavelength Conversion Unit for Compact Projectors
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Solution Overview
Problem
Existing curved-surface color wheels in lighting and projection systems are limited by their disc shape, which restricts the miniaturization of projectors due to size requirements for effective light excitation and heat dissipation, leading to increased thickness and inefficiencies in wavelength conversion.
Innovation Solution
A curved-surface apparatus with an annular wavelength conversion unit featuring multiple component regions for different color conversion substances, a beam splitter, and condenser lenses to efficiently convert and project blue, green, and red light, allowing for compact design and controlled light source excitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a disc type color wheel is used to achieve light excitation and heat dissipation, then the wavelength conversion effect is improved, but the thickness of the projector increases
Solution Approach 1:
The patent applies a curved surface design to the wavelength conversion unit, replacing the traditional flat disc structure with a curved annular configuration. This curvature enables more efficient light path control and heat dissipation distribution, achieving effective wavelength conversion while reducing the overall thickness requirement of the projector system.
Solution Approach 2:
The patent transitions from a two-dimensional disc structure to a three-dimensional curved annular structure. By utilizing the curved surface geometry, the system achieves better light excitation efficiency and heat dissipation performance without proportionally increasing the radial thickness, effectively solving the contradiction between conversion effectiveness and device thickness.
2Reliability
If the diameter of the color wheel is increased to improve heat dissipation and light excitation, then the wavelength conversion performance is improved, but the device complexity and size increase
Solution Approach 1:
The wavelength conversion unit is divided into multiple component regions with different conversion substances arranged on the curved annular surface. This segmentation allows each region to be optimized for specific wavelength conversions while the overall curved structure maintains compact dimensions, reducing both size and structural complexity compared to a large flat disc.
Solution Approach 2:
The patent employs multiple wavelength conversion substances with different properties distributed across the curved annular structure. This composite approach enables efficient heat dissipation and light excitation across different spectral regions without requiring a single large-diameter structure, thereby reducing device complexity while maintaining performance.
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 compact projector designs by efficiently converting light wavelengths and managing heat dissipation, allowing for reduced projector thickness and improved performance in lighting and projection applications.
Implementation Method 1
a first component region having red wavelength conversion substances, a second component region having green wavelength conversion substances
Implementation Method 2
a beam splitter set configured to reflect red light and green light and transmit blue light
Implementation Method 3
a second condenser lens set and a third condenser lens set which is disposed near the wavelength conversion unit
Data Source
AI summary
A curved-surface apparatus for wavelength converting. The apparatus includes: a light source excitation unit comprising a plurality of light source exciters for emitting identical or different excited light, respectively; a wavelength conversion unit provided with annular structure; a plurality of component sets circularly disposed on a curved surface of the annular structure and divided into a plurality of component regions provided with predetermined color wavelength conversion substances; a beam splitter set configured to reflect the excited light emitted by the light source excitation unit and transmit predetermined light; a condenser lens set disposed near the wavelength conversion unit.