Miniaturized Optical Projection Subsystem for Portable Devices
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Solution Overview
Problem
Existing optical projectors are limited by large dimensions and high power consumption, making them unsuitable for portable applications while maintaining low power consumption, low cost, and high image quality.
Innovation Solution
A miniaturized projection subsystem using an incoherent, homogenized light beam provided by a solid state light emitter coupled to a heat sink, combined with a refractive body and image-forming device, optimized for low volume and high power efficiency, achieving a luminous flux of at least 3 lumens with a volume of less than 14 cubic centimeters and a thickness of less than 14 millimeters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional optical projectors are used, then image projection capability is achieved, but volume and power consumption are too large for portable applications
Solution Approach 1:
The patent changes the light source parameter from traditional lamps to solid-state light emitters (LEDs, laser diodes), which fundamentally alters the size and power consumption characteristics. This parameter change enables miniaturization while maintaining projection capability, directly resolving the contradiction between portable size and projection performance
Solution Approach 2:
The patent replaces traditional mechanical lamp-based illumination systems with solid-state light emitting devices. This substitution eliminates the need for large bulb housings, reflectors, and associated mechanical components, dramatically reducing projector volume and power consumption while maintaining image projection function
2Use of energy by stationary object
If solid state light emitters are used, then power consumption and size are reduced, but heat dissipation becomes a critical challenge
Solution Approach 1:
The patent introduces heat sink structures as intermediary thermal management components between the solid-state light emitters and the environment. These heat sinks act as thermal intermediaries that efficiently conduct and dissipate heat, enabling the use of power-efficient solid-state sources while controlling operating temperatures within safe limits
Solution Approach 2:
The patent converts the harmful heat byproduct of solid-state light emitters into a manageable thermal flow path through integrated heat sink design. By providing dedicated thermal pathways and dissipation structures, the system transforms the heat problem into a controlled thermal management feature, allowing high power efficiency operation
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 solution enhances portability efficacy by achieving high power efficiency and small size, ensuring bright image projection in ambient lighting conditions with improved image quality and safety, avoiding the drawbacks of coherent light sources like speckle and eye safety issues.
Implementation Method 1
The solid state light emitter receives an electrical power level and is couplable to a heat sink
Implementation Method 2
The solid state light emitter receives an electrical power level and is couplable to a heat sink
Implementation Method 3
The illumination subsystem includes a collection lens, a collimator and at least one solid state light emitter
Implementation Method 4
The illumination subsystem includes a collection lens, a collimator and at least one solid state light emitter
Implementation Method 5
The illumination subsystem includes a collection lens, a collimator and at least one solid state light emitter
Implementation Method 6
The projection subsystem includes an image-forming device. The image forming device receives image data and the polarized beam
Implementation Method 7
The projection subsystem comprises a projection lens assembly. The projection lens assembly receives the image from the refractive body and provides an image projection beam
Implementation Method 8
The solid state light emitter receives an electrical power level and is couplable to a heat sink
Data Source
AI summary
A projection subsystem includes a light engine that provides a collection lens, a collimator and at least one solid state light emitter. A projection lens assembly receives the image and provides a projection beam having a luminous flux level. The projection subsystem has a portability efficacy.