Air Ionization Display Device Using Beam Splitting for Large-Range Imaging
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Solution Overview
Problem
Existing air ionization display systems are limited by high optical power thresholds and component damage, restricting the number of pixels and picture region, making large-picture imaging difficult.
Innovation Solution
An air ionization display apparatus utilizing a pulse laser source, beam splitter, pulse laser regulation assembly, beam combiner, and light field adjustment and control assembly to split and combine laser beams, adjusting wavelength and time delay to ionize air at a display region, forming a holographic image at a relatively low output power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pulse output power of light source is raised to increase number of pixels, then display resolution is improved, but optical components may be damaged due to exceeding damage thresholds
Solution Approach 1:
The patent divides a single high-power pulse laser beam into multiple lower-power sub-beams using beam splitters. Each sub-beam corresponds to a group of pixels, allowing high display resolution without requiring each optical component to withstand extremely high peak power densities, thus resolving the contradiction between resolution and component durability.
Solution Approach 2:
The patent introduces a temporal dimension by sequentially directing different sub-beams to the spatial light modulator over time. Instead of all pixels being illuminated simultaneously by one high-power beam, the system uses time-multiplexed lower-power beams, achieving high resolution while keeping instantaneous power density within safe limits for optical components.
2Area of stationary object
If pulse output power is increased to expand picture region, then display area is improved, but optical components cannot withstand the high peak power density for long time
Solution Approach 1:
The patent segments the picture region into multiple zones corresponding to different sub-beams. Each optical component only needs to handle a portion of the total picture area at any given time, reducing the power density burden on each component while maintaining the ability to display large pictures through sequential scanning of all zones.
Solution Approach 2:
The patent employs periodic scanning of sub-beams across different spatial regions. Each optical component experiences periodic low-power exposure as different sub-beams are directed through it over time, rather than continuous high-power exposure, thereby extending component service life while covering large picture areas.
3Measurement precision
If number of focal points is increased to improve pixel count, then display resolution is improved, but pulse power threshold per unit area limits the number of focal points
Solution Approach 1:
The patent segments the total pixel set into multiple groups, with each group processed by a dedicated sub-beam. This allows the system to achieve a high total pixel count by distributing the power requirements across multiple lower-power beams rather than concentrating all power into a single beam that must create all focal points simultaneously.
Solution Approach 2:
The patent uses dynamic control of beam paths and timing to sequentially activate different sub-beams for different pixel groups. This dynamic time-multiplexed approach allows the system to exceed the static power threshold limit by distributing temporal power delivery across multiple lower-intensity pulses, achieving higher effective pixel counts.
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
Enables large-range air ionization at reduced laser output power, ensuring safety and reducing costs while allowing for three-dimensional image display.
Implementation Method 1
a pulse laser source configured to generate a pulse laser beam
Implementation Method 2
a beam splitter configured to split the pulse laser beam into a first sub-beam and a second sub-beam
Implementation Method 3
a pulse laser regulator configured to regulate a wavelength of the second sub-beam to obtain a third sub-beam
Implementation Method 4
an optical delay line configured to regulate the time difference between the third sub-beam and the first sub-beam to delay an emission of the third sub-beam
Implementation Method 5
a beam combiner configured to combine the first sub-beam and the third sub-beam that is subject to the delayed emission to obtain a combined beam
Implementation Method 6
a focusing unit configured to focus the combined beam subject to the direction adjustment in the display region, and ionize the air at a position of a focal point to form an image
Implementation Method 7
a zoom unit disposed between a galvanometer unit and the focusing unit, and configured to adjust a divergence angle of a beam emitted by the galvanometer unit and adjust a depth position of the focal point
Implementation Method 8
an adjustment unit configured to perform a direction adjustment on the combined beam
Implementation Method 9
ionize the air at a display region to form a holographic image
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Provided are an air ionization display apparatus (10) and a control method therefor, which relate to the field of imaging technologies. The air ionization display apparatus (10) includes: a pulse laser source (11) configured to generate a pulse laser beam; a beam splitter (12) configured to split the pulse laser beam into a first sub-beam and a second sub-beam; a pulse laser regulation assembly (13) configured to regulate a wavelength of the second sub-beam to obtain a third sub-beam, and regulate a time difference between the third sub-beam and the first sub-beam to delay an emission of the third sub-beam; a beam combiner (14) configured to combine the first sub-beam and the third sub-beam that is subject to the delayed emission to obtain a combined beam; and a light field adjustment and control assembly (15) configured to adjust and converge the combined beam, and ionize air at a display region to form a holographic image.