Stereoscopic Display Beam Convergence for Precise Bright Spot Positioning
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Solution Overview
Problem
Existing stereoscopic display devices face challenges in accurately positioning bright spots due to the correlation between fluorescent material characteristics and laser beam intensity, leading to deteriorated image quality.
Innovation Solution
A stereoscopic display device with a light source unit, converter, splitter, irradiation unit, and intensity control unit that uses collimated beams, convergers, and scanners to control beam convergence, focal distance, and optical axis directions, along with phase and intensity control, to improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a laser beam is used to excite fluorescent material to generate bright spots, then brightness of stereoscopic image is improved, but positioning accuracy of bright spots deteriorates due to correlation between fluorescent material characteristics and laser beam intensity
Solution Approach 1:
The patent divides the single laser beam into multiple beams using a beam splitter, then processes each beam independently through separate optical paths with individual focal length adjustment mechanisms. This segmentation allows independent optimization of each beam's focusing characteristics, resolving the positioning inaccuracy caused by intensity-fluorescent material correlation
Solution Approach 2:
The patent introduces dynamic adjustment capabilities by making focal lengths of converging lenses variable rather than fixed. Each optical path can independently adjust its focal length to compensate for intensity variations, enabling adaptive positioning accuracy while maintaining brightness across different viewing conditions
2Manufacturing precision
If multiple collimated beams are generated and caused to converge to improve image quality, then positioning accuracy is improved, but device complexity increases due to multiple mirrors and optical elements
Solution Approach 1:
The patent designs optical elements such as the beam splitter and converging lenses to serve multiple functions simultaneously. The beam splitter not only divides beams but also maintains coherent optical paths, while the adjustable lenses provide both focusing and positioning functions, reducing the need for separate dedicated components
Solution Approach 2:
The patent combines multiple optical functions into integrated optical paths where beams are split, directed, focused, and adjusted within unified optical train. The multiple beams share common optical elements like the fluorescent material target area and detection systems, consolidating complexity rather than multiplying independent subsystems
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
Enhances image quality by precisely controlling light emission intensity and interference, resulting in improved contrast and clarity of stereoscopic images.
Implementation Method 1
a laser light source configured to emit a laser beam
Implementation Method 2
a splitter configured to emit a plurality of collimated beams by reflecting the collimated beam which is incident from the converter using a plurality of mirrors having different reflection directions
Implementation Method 3
a converger configured to cause the plurality of collimated beams incident from the light source unit to converge to generate a plurality of converged beams and to cause the plurality of converged beams to interfere with each other at a light condensing position
Implementation Method 4
to cause the plurality of converged beams to interfere with each other at a light condensing position
Implementation Method 5
a scanner configured to three-dimensionally scan the light condensing position by using a drawing space including a fluorescent material which is excited to spontaneously emit light with irradiation with a laser beam
Implementation Method 6
an intensity control unit configured to control an intensity at the light condensing position on the basis of drawing data indicating a light emission intensity at each position in the drawing space
Data Source
AI summary
A stereoscopic display device includes a light source unit including a laser light source, a converter configured to convert a laser beam to a collimated beam with a predetermined diameter, and a splitter configured to emit a plurality of collimated beams by reflecting the collimated beam incident from the converter using a plurality of mirrors having different reflection directions, an irradiation unit including a converger configured to cause the plurality of collimated beams incident from the light source unit to converge to generate a plurality of converged beams and to cause the plurality of converged beams to interfere with each other at a light condensing position and a scanner configured to three-dimensionally scan the light condensing position by changing a focal distance at which the converged beams are caused to converge by the converger and changing optical axis directions.