Portable Projector Light Transmission Member Optical Path
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Solution Overview
Problem
Conventional projectors require a large installation space due to their three-dimensional optical system arrangement, leading to increased size, light loss, and instability of optical elements.
Innovation Solution
A portable projector design featuring a light transmission member with optical elements on two facing surfaces, utilizing a multi-type laser light source and scan mirrors to minimize the light path and stabilize optical arrangements, reducing the projector's size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a three-dimensional arrangement of optical elements is used in conventional projectors, then the optical system can be assembled, but the installation space and projector size become excessively large
Solution Approach 1:
The patent applies dimensionality change by transitioning from a conventional three-dimensional arrangement of optical elements to a two-dimensional planar configuration. The optical elements are arranged on a light transmission member in a flattened layout, which significantly reduces the vertical height and overall volume of the projector while maintaining the functional optical path. This dimensional transformation directly addresses the contradiction by reducing projector size without compromising the optical system's assembly capability.
Solution Approach 2:
The patent implements nesting by integrating multiple optical elements (lens groups, mirrors, beam splitters) onto a single light transmission member or a compact stack of members. This nested arrangement allows the optical system to be condensed into a smaller volume, as elements that would traditionally occupy separate three-dimensional spaces are now nested or closely integrated in a planar configuration, thereby reducing the overall projector footprint.
2Illumination intensity
If the optical path length is increased in conventional projectors, then more optical elements can be included, but light loss increases and image brightness decreases
Solution Approach 1:
By flattening the optical system into a two-dimensional arrangement on the light transmission member, the patent shortens the effective optical path length compared to conventional three-dimensional designs. This reduced path length minimizes light attenuation and energy loss, thereby maintaining higher illumination intensity and image brightness. The dimensional change allows the light to travel a more direct and shorter distance from the light source to the projection lens.
Solution Approach 2:
The patent extracts and eliminates unnecessary or redundant optical elements from the conventional design by carefully selecting only the essential components needed for the projection function. This extraction process reduces the total number of elements in the optical path, thereby minimizing cumulative light loss and improving overall system efficiency and image brightness.
3Stability of the object's composition
If conventional three-dimensional optical systems are used, then the design is established, but the arrangement of optical elements becomes unstable
Solution Approach 1:
The patent merges multiple optical elements onto a single light transmission member or integrates them into a closely coupled assembly. This merging approach stabilizes the arrangement by reducing the number of separate components and their associated mounting interfaces, thereby minimizing alignment drift and mechanical instability. The integrated configuration ensures that relative positions of optical elements remain fixed and stable during operation.
Solution Approach 2:
By transitioning to a two-dimensional planar arrangement on the light transmission member, the patent creates a more stable optical configuration. The flattened layout reduces the susceptibility to mechanical disturbances and alignment errors that are common in three-dimensional stacked arrangements. This dimensional change provides a more rigid and stable platform for the optical elements, improving overall system stability.
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 design achieves a compact projector size, minimizes light loss, and stabilizes optical elements, enabling a bright and vivid image display while being suitable for portable applications.
Implementation Method 1
a light transmission member having first and second surfaces; a multi-type laser light source for emitting light beams onto the first surface of the member based on an external image signal, so as to allow the light beams to be transmitted into the member
Implementation Method 2
one or more optical elements supported on at least one of the first and second surfaces of the member for diffracting and reflecting the light beams incident from the multi-type laser light source into the member
Implementation Method 3
one or more optical elements supported on at least one of the first and second surfaces of the member for diffracting and reflecting the light beams incident from the multi-type laser light source into the member
Implementation Method 4
at least one multi-type scan mirror supported on one of the first and second surfaces of the member for scanning the light beams diffracted and reflected from the optical elements onto an external screen located at the outside of the member
Data Source
AI summary
A portable projector is disclosed. The portable projector comprises a light transmission member having first and second surfaces, a multi-type laser light source including a plurality of sub laser light sources for emitting light beams onto the first surface of the member based on an external image signal, so as to allow the light beams to be transmitted into the member, one or more optical elements supported on at least one of the first and second surfaces of the member for diffracting and reflecting the light beams incident from the multi-type laser light source into the member, and at least one multi-type scan mirror supported on one of the first and second surfaces of the member for scanning the light beams diffracted and reflected from the optical elements onto an external screen located at the outside of the member, based on an external control signal.