Stereoscopic Display Beam Splitting 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 that includes a laser light source, a converter, a divider, a scanner, and an intensity control unit to control the intensity and position of laser beams, using a fluorescent material to emit light, with the divider distributing focal positions of zeroth-order and higher-order beams 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 the brightness of the stereoscopic image is improved, but the positioning accuracy of bright spots deteriorates due to the correlation between fluorescent material characteristics and laser beam intensity
Solution Approach 1:
The patent divides the laser beam into multiple independent beams (first laser beam and second laser beam) that can be controlled separately. The first laser beam excites the fluorescent material to generate bright spots, while the second laser beam is used to adjust the position of these bright spots by exciting additional fluorescent material or modifying the excitation pattern. This segmentation allows independent optimization of brightness and positioning accuracy.
Solution Approach 2:
The patent dynamically adjusts parameters of the laser beams, including intensity, direction, and focal position, to achieve both bright spot generation and precise positioning. By changing the parameters of the second laser beam based on the generated bright spots, the system can compensate for positioning errors and maintain high positioning accuracy while preserving the brightness generated by the first laser beam.
2Illumination intensity
If the laser beam intensity is increased to improve brightness, then the illumination intensity is improved, but multiple bright spots may be generated at unintended positions
Solution Approach 1:
The second laser beam acts as an intermediary that refines the excitation pattern. After the first laser beam generates bright spots, the second laser beam is introduced to adjust and correct the excitation distribution. This intermediary beam prevents the formation of multiple unintended bright spots by providing a corrective excitation pattern that consolidates the light emission at the desired single position.
Solution Approach 2:
The system uses feedback from the generated bright spots to adjust the second laser beam parameters. By detecting the position and characteristics of the bright spots generated by the first laser beam, the system modifies the second laser beam's intensity and direction to compensate for any deviations, ensuring that only a single bright spot appears at the correct position without multiple unintended emissions.
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 device enhances image quality by controlling the intensity and position of light emission, preventing multiple bright spots and optimizing the stereoscopic image display.
Implementation Method 1
a fluorescent material which is excited to spontaneously emit light with irradiation with a laser beam
Data Source
AI summary
A stereoscopic display device includes a laser light source configured to emit a laser beam, a converter configured to convert the emitted laser beam to a collimated beam with a predetermined diameter, a divider configured to divide the collimated beam into a zeroth-order beam and a higher-order beam equal to or higher than a first-order beam by changing a wavefront of the collimated beam, a scanner configured to three-dimensionally scan a light condensing position of a converged beam by using a drawing space including a fluorescent material which is excited to spontaneously emit light with irradiation with a laser beam as a scan target range and changing optical axis directions in which converged beams including the zeroth-order beam and the higher-order beam are emitted and a focal distance at which the zeroth-order beam converges, and an intensity control unit configured to control an intensity at the light condensing position.