Wavelength Conversion Element Substrate Reinforcement
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Solution Overview
Problem
The substrate in existing projection apparatuses has insufficient structural strength, leading to uneven surfaces and unstable excitation efficiency due to poor flatness, affecting image quality.
Innovation Solution
A wavelength conversion element comprising a substrate with a first engaging portion and a reinforcement plate with a second engaging portion, connected via an adhesive layer, enhancing deformation resistance and structural strength, allowing for accurate focusing of the excitation beam on the wavelength conversion layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal ring is attached to the substrate in a plane manner to increase structural strength, then the structural strength is improved, but the surface flatness deteriorates due to insufficient strength and deformation
Solution Approach 1:
The patent transitions from a planar attachment approach to a three-dimensional engaging structure. The engaging portions extend in the thickness direction of the substrate, creating interlocking protrusion-recess structures that provide mechanical engagement beyond the simple plane attachment, thereby improving both strength and flatness simultaneously
Solution Approach 2:
The patent combines the substrate with a reinforcement plate to form a composite structure. This composite design integrates two different components with complementary functions - the substrate provides the base structure while the reinforcement plate enhances strength and maintains flatness through their interconnected engaging portions
2Ease of manufacture
If the substrate has insufficient structural strength, then manufacturing is simpler, but excitation efficiency becomes unstable due to poor flatness during rotation
Solution Approach 1:
The patent divides the reinforcement structure into separate engaging portions: first engaging portions on the substrate and second engaging portions on the reinforcement plate. This segmentation allows each component to be manufactured independently with standard processes, while their assembly creates the rigid structure needed for stable excitation efficiency during rotation
3Adaptability or versatility
If the substrate deforms during rotation, then material selection is more flexible, but image quality deteriorates due to unstable excitation of the phosphor layer
Solution Approach 1:
The reinforcement plate acts as a counterbalancing element that compensates for the substrate's deformation tendencies during rotation. By providing opposing structural support through the engaging portions, the reinforcement plate counteracts the deformations that would otherwise degrade image quality, allowing flexible material selection while maintaining precision
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 improved structural strength and flatness of the substrate ensure stable excitation efficiency and better image quality in projection apparatuses.
Implementation Method 1
The adhesive layer is connected between the substrate and the reinforcement plate
Implementation Method 2
The phosphor layer is excited by the excitation beam to generate the color beam required to form the projected image
Data Source
AI summary
A wavelength conversion element includes an illumination system, a light valve, and a projection lens. The illumination system is configured to provide an illumination beam. The light valve is disposed on a transmissive path of the illumination beam to convert the illumination beam into an image beam. The projection lens is disposed on a transmissive path of the image beam. The illumination system includes an excitation beam source and the aforementioned wavelength conversion element. The excitation beam source is configured to provide an excitation beam. The wavelength conversion element is disposed on a transmissive path of the excitation beam. A projection apparatus adopting the aforementioned wavelength conversion element is further provided. The substrate has good structural strength and the surface of the substrate has better flatness, so the excitation beam can be accurately focused on the wavelength conversion layer to maintain stable excitation efficiency.