Folded Optical-Path Projection Device for Compact Packaging
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Solution Overview
Problem
The optical path design of existing projection devices makes it difficult to reduce their size, limiting their portability and versatility.
Innovation Solution
A projection device with a lighting system that includes a light source module, first and second light path adjustment elements, a light combining and splitting element, and a wavelength conversion assembly, which folds the light path through non-parallel directions to minimize device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional optical path design is used in projection devices, then the optical functionality is maintained, but the device size cannot be reduced
Solution Approach 1:
The patent employs multiple light path adjustment elements (first and second light path adjustment elements) to fold the optical path in multiple directions. The first light path adjustment element changes the light direction from a first direction to a second direction, and the second light path adjustment element further adjusts it to a third direction, creating a three-dimensional folded optical path that reduces the device's overall footprint while maintaining optical functionality
Solution Approach 2:
The patent positions the light source module below the projection lens by folding the optical path, effectively nesting the light source within the vertical space of the device. This nesting approach allows the optical components to be arranged in a compact, space-efficient configuration that reduces the device's external dimensions
2Adaptability or versatility
If the light source module is positioned below the projection lens, then device portability is enhanced, but the light path transmission becomes more complex
Solution Approach 1:
The patent uses light path adjustment elements to redirect light in multiple dimensions: the first light path adjustment element redirects light from a first direction to a second direction, and the second light path adjustment element redirects it to a third direction. This multi-dimensional light path folding enables the light source to be positioned below the projection lens while maintaining efficient light transmission
Solution Approach 2:
The patent introduces light path adjustment elements as intermediary components between the light source module and the projection lens. These intermediaries (first and second light path adjustment elements) facilitate the complex light transmission required by the non-traditional layout, managing the light direction and ensuring efficient transmission despite the increased path complexity
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 folded light path configuration allows the light source module to be positioned below the projection lens, reducing the device's overall size and enhancing portability.
Implementation Method 1
The first light path adjustment element is disposed on a transmission path of the light source beam and configured to transmit the light source beam along a second direction
Implementation Method 2
The wavelength conversion assembly is configured to convert part of the light source beam into a conversion light beam with a different wavelength
Implementation Method 3
The second light path adjustment element is disposed between the light combining and splitting element and the light valve assembly and is configured to transmit the conversion light beam to the light valve assembly along a fourth direction
Implementation Method 4
The light valve assembly is configured to convert the conversion light beam into an image light beam and to transmit the image light beam to the projection lens
Data Source
AI summary
The disclosure provides a projection device, including a lighting system, a light valve assembly, and a projection lens. The lighting system includes a light source module, a first light path adjustment element, a light combining and splitting element, a wavelength conversion assembly, and a second light path adjustment element. The light source module provides a light source beam along a first direction. The first light path adjustment element transmits the light source beam along a second direction. The light combining and splitting element is disposed on a transmission path of the light source beam. The wavelength conversion assembly converts the light source beam into a conversion light beam transmitted to the light combining and splitting element. The light combining and splitting element transmits the conversion light beam along a third direction. The second light path adjustment element transmits the conversion light beam along a fourth direction.