Maxwellian View Display Space-Time Multiplexing Field of View
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Solution Overview
Problem
The Maxwellian view display has a limited field of view and requires a fixed position for observation due to the convergence of light beams within a small pupil size, restricting the degree of freedom in viewing.
Innovation Solution
A space-time multiplexing scheme is employed by changing the position of a point light source over time using a light source unit, converting the light into parallel light with a first lens, and focusing it with a second lens, allowing the image to be generated and viewed within a predetermined area with freedom of movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light beams are converged within a small pupil size to achieve Maxwellian view, then focus adjustment is not required and a clean image can be observed, but the field of view is limited and a fixed position is required for observation
Solution Approach 1:
The patent applies dynamics by making the light source movable instead of fixed. The light source is moved to different positions corresponding to different viewing locations, allowing the system to adapt to multiple observation points while maintaining the Maxwellian view condition at each position. This resolves the contradiction by making the system dynamic rather than static.
Solution Approach 2:
The patent employs periodic action by sequentially moving the light source between multiple positions in a periodic manner. Each position corresponds to a specific viewing location, and the light source alternates between these positions. This periodic movement allows different observers at different locations to view the image without requiring focus adjustment, thus maintaining image quality while providing viewing freedom.
2Device complexity
If a single point light source is used to achieve Maxwellian view, then the optical system is simple, but the viewing area is restricted to a fixed point
Solution Approach 1:
The patent applies segmentation by dividing the single light source into multiple discrete light source positions. Instead of using one fixed light source, the system uses multiple light sources (or one light source that can be positioned at multiple locations) corresponding to different viewing areas. Each light source position serves a specific viewing location, thus expanding the overall viewing area while keeping each individual optical path relatively simple.
Solution Approach 2:
The patent extends the system from one dimension (single fixed position) to multiple dimensions by adding spatial positions for the light source. The light source can be located at different coordinates in space, each corresponding to a different viewing location. This dimensional expansion allows the system to serve multiple viewing areas without significantly increasing the complexity of each individual optical path.
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
This approach maintains the advantage of no focus adjustment requirement while expanding the viewing area and allowing observation from a range of positions, rather than a fixed point, thus overcoming the limitations of the traditional Maxwellian view.
Implementation Method 1
a first lens configured to convert light emitted from the light source unit into parallel light
Implementation Method 2
a second lens configured to focus the image generated in the image generator
Data Source
AI summary
Provided is a Maxwellian view display which uses a space-time multiplexing scheme and widens a field of view, thereby having a degree of freedom within a set area instead of a fixed position while maintaining the advantage of the existing Maxwellian view, in which a clear image can be observed irrespective of the difference in individual ability for focal point adjustment since the focal point does not need to be adjusted. According to an embodiment of the present invention, a display includes: a light source unit for changing the position of a point light source according to time; a first lens for converting the light emitted from the light source unit to be parallel; an image generating unit for generating an image using the parallel light incident from the first lens; and a second lens for focusing the image generated by the image generating unit.