Air ionization display device

Abstract

The present invention discloses an air ionization display device, comprising a plurality of pulse light output units, each pulse light output unit comprising: a pulse light source, a galvanometer assembly and a lens assembly, the output light beam of the pulse light source ionizes air in the focal area of ​​the lens assembly through the adjustment of the galvanometer assembly and the focusing of the lens assembly to form a holographic real image, and the holographic real images of the plurality of pulse output units cooperate with each other to form a combined real image. According to the air ionization display device of the embodiment of the present invention, a plurality of pulse light output units are combined to combine a plurality of holographic real images into an integral combined real image, thereby greatly increasing the range of the imaging area and improving the imaging efficiency of the air ionization display device.

Description

Technical Field

[0001] The invention relates to the field of air ionization, and in particular to an air ionization display device. Background Art

[0002] The air ionization display system uses a high-power pulse light source to output laser pulses, which are modulated by a spatial light modulator and then reflected to a galvanometer system to adjust its emission direction. The light beam passes through a zoom lens and a flat-field focusing lens and is focused to a designated point in the air ionization area. Finally, the high-power laser ionizes the air molecules to form a bright spot. The computer actively controls the spatial light modulator, the galvanometer system, and the zoom lens to adjust the position of the laser ionization point and the pixels of the display screen according to the required display screen. The air ionization display system in the related art is affected by factors such as the galvanometer system and the zoom lens. The screen area of ​​the air ionization display is small and cannot meet the needs of aerial imaging display of a larger screen. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an air ionization display device, which can expand the range of the imaging area by combining multiple pulse light output units.

[0004] According to an embodiment of the present invention, the air ionization display device includes a plurality of pulse light output units, each of which includes: a pulse light source, a galvanometer assembly and a lens assembly. The output light beam of the pulse light source ionizes the air in the focal area of ​​the lens assembly through the adjustment action of the galvanometer assembly and the focusing action of the lens assembly to form a holographic real image. The plurality of pulse output units ionize the air to form respective holographic real images that cooperate with each other to form an overall real image.

[0005] According to the air ionization display device of the embodiment of the present invention, a plurality of pulse light output units are combined to combine a plurality of holographic real images into an integral combined real image, thereby greatly increasing the range of the imaging area and improving the imaging efficiency of the air ionization display device.

[0006] In addition, the air ionization display device according to the present invention may also have the following additional technical features:

[0007] According to some embodiments of the present invention, the air ionization display device further comprises a control computer, wherein the control computer signals are connected to a plurality of the pulse light output units and are used to control the imaging state of the holographic real image to form the combined real image.

[0008] According to some embodiments of the present invention, in a plane direction perpendicular to a line connecting the holographic real image and the pulse light output unit, a plurality of the pulse light output units are arranged in a plurality of rows and columns.

[0009] According to some embodiments of the present invention, a part of the multiple pulse light output units constitute an upper pulse light output unit group, and another part of the multiple pulse light output units constitute a lower pulse light output unit group, and the holographic real image formed by the pulse light output units in the upper pulse light output unit group is located below the upper pulse light output unit group, and the holographic real image formed by the pulse light output units in the lower pulse light output unit group is located above the lower pulse light output unit group.

[0010] According to some embodiments of the present invention, the pulse light output unit further includes a spatial light modulator, and the spatial light modulator is located between the pulse light source and the galvanometer assembly and is used to adjust parameters of the light beam.

[0011] According to some embodiments of the present invention, the pulse light output unit further includes: a shell, wherein the pulse light source, the galvanometer assembly and the lens assembly are all arranged in the shell, and a pulse output port is formed in a portion of the shell between the lens assembly and the focus of the lens assembly.

[0012] According to some embodiments of the present invention, the lens assembly includes a zoom lens and a flat-field focusing lens, and the zoom lens is located between the flat-field focusing lens and the galvanometer assembly.

[0013] According to some embodiments of the present invention, the pulse width of the pulse light source is 50fs-100ns, the pulse energy of the pulse light source is 20μJ-10mJ, and the repetition frequency of the pulse light source is 500Hz-10MHz.

[0014] According to some embodiments of the present invention, the pulse light source in the pulse light output unit is multiple, and the pulse light output unit further includes a beam combiner, a repetition frequency adjustment component, a pulse time delay monitor and at least one time delay line.

[0015] The light beams of the above-mentioned multiple pulse light sources are all projected onto the beam combining mirror and merged into one light beam. The light beam emitted by the beam combining mirror is projected into the galvanometer assembly. The repetition frequency adjustment assembly is arranged between the pulse light source and the beam combining mirror, and is used to adjust the repetition frequency of the multiple pulse light sources. The pulse time delay monitor is arranged between the beam combining mirror and the galvanometer assembly, and is used to monitor the pulse delay signal of the light beam emitted by the beam combining mirror. The time delay line is arranged between the pulse light source and the beam combining mirror and is connected to the pulse time delay monitor signal, and is used to compensate for the pulse delay of the light beam emitted by the pulse light source according to the feedback information of the pulse time delay monitor.

[0016] According to some embodiments of the present invention, the repetition frequency adjustment component includes a plurality of photodetectors, a frequency reference source and a servo controller, the plurality of photodetectors are arranged one-to-one between the plurality of pulse light sources for detecting the repetition frequency of the pulse light sources, the frequency reference source is used to provide a frequency reference standard, and the servo controller signal connects the photodetectors, the frequency reference source and the pulse light source, and is used to control the repetition frequency of the output pulse of the pulse light source according to the feedback signal of the photodetector and the reference frequency signal of the frequency reference source.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of an air ionization display device according to an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of a pulse light output unit according to an embodiment of the present invention;

[0021] Figure 3 FIG. 4 is a schematic structural diagram of an air ionization display device according to another embodiment of the present invention.

[0022] Reference numerals:

[0023] 100: air ionization display device;

[0024] 10: pulse light output unit; 11: pulse light source; 12: galvanometer assembly; 13: lens assembly; 131: zoom lens; 132: flat-field focusing lens; 14: upper pulse light output unit group; 15: lower pulse light output unit group;

[0025] 20: Control computer;

[0026] 30: spatial light modulator;

[0027] 40: housing; 41: pulse output port;

[0028] 50: Display area. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] Reference below Figure 1-Figure 3 An air ionization display device according to an embodiment of the present invention is described.

[0031] According to some embodiments of the present invention, the air ionization display device 100 includes a plurality of pulse light output units 10 , each of which includes a pulse light source 11 , a galvanometer assembly 12 and a lens assembly 13 .

[0032] The output light beam of the pulse light source 11 is projected onto the galvanometer assembly 12. The galvanometer assembly 12 includes two groups of vertically arranged reflectors. The two groups of reflectors respectively swing the light beam in the forward and backward and left and right directions, thereby controlling the irradiation path of the light beam. The output light beam of the galvanometer assembly 12 is projected onto the lens assembly 13. The lens assembly 13 focuses the light beam. After the light beam is concentrated at the focal position of the lens assembly 13, the power density increases and reaches the power threshold of the laser ionization air. Finally, the high-power laser ionizes the air molecules to form a luminous bright spot, and then forms the holographic real image required by the user. In this process, the holographic real image formed by a single pulse light output unit 10 has a small range and cannot form the complex graphics required by the user.

[0033] To this end, the air ionization display device 100 is provided with a plurality of pulse light output units 10, and the holographic real images output by the plurality of pulse light output units 10 cooperate with each other to form a combined real image, thereby greatly increasing the imaging area of ​​the air ionization display device 100, and the pulse light output unit 10 can be adjusted according to the imaging requirements to meet the needs of large-scale imaging and complex imaging.

[0034] The air ionization display system in the prior art has a small display range due to factors such as the galvanometer assembly and the zoom lens, and cannot meet the air display requirements of larger images. If more demanding galvanometer assemblies and lens assemblies are used, the cost investment needs to be greatly increased.

[0035] According to the air ionization display device 100 of the embodiment of the present invention, a plurality of pulse light output units 10 are combined to combine a plurality of holographic real images into an overall combined real image, thereby greatly increasing the range of the imaging area and improving the imaging efficiency of the air ionization display device 100. Compared with the air ionization display system in the prior art, not only the range of the imaging area is increased, but also the requirements for the galvanometer assembly 12 and the lens assembly 13 are lower, which is conducive to reducing production costs.

[0036] The air ionization display device 100 according to the embodiment of the present invention further includes a control computer 20. Since the industrial objects faced by many modern control software are no longer simple single-task lines, but more complex multi-task systems, a single-task line can only control the entire work process by physical methods or simple systems, but in real life, more complex multi-task systems cannot control the entire work process by physical methods or simple systems, so a control computer 20 is needed. The control computer 20 signal is connected to multiple pulse light output units 10 to control the imaging state of the holographic real image to form a combined real image.

[0037] By setting a signal to connect a control computer 20 of multiple pulse light output units 10, and setting a corresponding control program in the control computer 20 to regulate the pulse light output units 10, the control computer 20 can not only adjust the position, structure and other parameters of the holographic real image formed by the pulse light output unit 10 according to the imaging requirements, but also adjust them according to the real-time working status of the multiple pulse light output units 10, to ensure that the holographic real images formed by the multiple pulse light output units 10 can be smoothly spliced ​​to form a combined real image, and to ensure that the combined real image is displayed or played as required.

[0038] like Figure 2 As shown, according to some embodiments of the present invention, multiple pulse light output units 10 are arranged in multiple rows and columns in a plane direction perpendicular to the line between the holographic real image and the pulse light output unit 10, for example, the pulse light output unit 10 forms a holographic real image vertically upward. Multiple pulse light output units 10 are arranged in multiple rows and columns in the horizontal direction, which has a simple structure and is easy to implement. In addition, arranging the pulse light output units 10 in multiple rows and columns can reduce the overall volume of the air ionization display device 100 and save occupied space. Furthermore, the interference between two adjacent pulse light output units 10 can be reduced, and the imaging path of the two adjacent pulse light output units 10 is prevented from being blocked, thereby improving the imaging stability of the air ionization display device 100.

[0039] like Figure 3 As shown, according to some other embodiments of the present invention, a part of the multiple pulse light output units 10 constitute an upper pulse light output unit group 14, and another part of the multiple pulse light output units 10 constitute a lower pulse light output unit group 15. The holographic real image formed by the pulse light output units 10 in the upper pulse light output unit group 14 is located below the upper pulse light output unit group 14, and the holographic real image formed by the pulse light output units 10 in the lower pulse light output unit group 15 is located above the lower pulse light output unit group 15.

[0040] That is to say, the combined real image formed by the air ionization display device is located between the upper pulse light output unit group 14 and the lower pulse light output unit group 15, the pulse light output units in the upper pulse light output unit group 14 are projected downward to form a holographic real image, and the pulse light output units in the lower pulse light output unit group 15 are projected upward to form a holographic real image, and the holographic real image formed by the upper pulse light output unit group 14 and the lower pulse light output unit group 15 is concentrated between the upper pulse light output unit group 14 and the lower pulse light output unit group 15 to form a combined real image.

[0041] By providing the upper pulse light output unit group 14 and the lower pulse light output unit group 15 , the three-dimensional height of the combined real image can be increased, and the upper pulse light output unit group 14 and the lower pulse light output unit group 15 will not interfere with each other.

[0042] According to some embodiments of the present invention, the pulse light output unit 10 further includes: a housing 40, wherein the pulse light source 11, the galvanometer assembly 12 and the lens assembly 13 are all disposed in the housing 40, and a pulse output port 41 is formed in the portion of the housing 40 between the lens assembly 13 and the focus of the lens assembly 13, and the pulse light beam can be projected onto the display area 50 through the pulse output port 41. By providing the housing 40, not only can the pulse light source 11, the galvanometer assembly 12 and the lens assembly 13 be protected from damage, but also the structural integrity of the pulse light output unit 10 can be improved. Furthermore, the pulse light output unit 10 having the housing 40 is more convenient in the arrangement process, has a simple circuit structure, and provides convenience for the combination of multiple pulse light output units 10.

[0043] According to some embodiments of the present invention, the lens assembly 13 includes a zoom lens 131 and a flat-field focusing lens 132. The zoom lens 131 is located between the flat-field focusing lens 132 and the galvanometer assembly 12. The high-power pulse light source 11 outputs laser pulses, which are modulated by the spatial light modulator 30 and then reflected to the galvanometer assembly 12 to adjust its emission direction. The light beam passes through the zoom lens 131 and the flat-field focusing lens 132 and is focused to a designated point in the air ionization area. Finally, the high-power laser ionizes the air molecules to form a luminous bright spot.

[0044] The zoom lens 131 can adjust the distance between the focus and the zoom lens 131 according to the imaging requirements, and then generate a holographic real image and a combined real image of a three-dimensional structure by adjusting the focus position. The flat-field focusing lens 132 cooperates with the zoom lens 131 to prevent the holographic real image and the combined real image from bending and deforming during the imaging process. The control computer 20 actively controls the spatial light modulator 30, the galvanometer assembly 12 and the lens assembly 13 to adjust the position of the laser ionization point and the pixels of the display image according to the image to be displayed.

[0045] According to some embodiments of the present invention, the pulse light output unit 10 further includes a spatial light modulator 30, which modulates the spatial distribution of light waves. The spatial light modulator 30 contains many independent units, which are arranged in a one-dimensional or two-dimensional array in space. Each unit can independently receive the control of an optical signal or an electrical signal, and change its own optical properties (transmittance, reflectivity, refractive index, etc.) according to the signal, thereby modulating the light waves passing through it. The spatial light modulator 30 is located between the beam combiner and the galvanometer assembly 12. When the light beam passes through the spatial light modulator 30, its optical parameters (amplitude, intensity, phase or polarization state) are modulated by each unit of the spatial light modulator 30, resulting in a beam of output light with a new spatial distribution of optical parameters.

[0046] By setting up a spatial light modulator 30, the amplitude, phase, polarization state and other parameters of the light beam generated by the pulse light source 11 are adjusted. The light beam modulates the light field through the spatial light modulator 30 and forms multiple focal points after passing through the lens assembly, thereby improving the imaging quality of the display screen.

[0047] According to some embodiments of the present invention, the repetition frequency of multiple pulse light output units 10 is the same, the pulse width of the pulse light source 11 is 50fs-100ns, the pulse energy of the pulse light source 11 is 20μJ-10mJ, and the repetition frequency of the pulse light source 11 is 500Hz-10MHz. The light beam generated by the pulse light source 11 within the above range can improve the imaging effect and pixels of the holographic real image, and the pulse light output units 10 with the same repetition frequency can facilitate the combination of the holographic real image.

[0048] According to some embodiments of the present invention, there are multiple pulse light sources 11 in the pulse light output unit 10, and the pulse light output unit 10 also includes a beam combiner, a repetition frequency adjustment component, a pulse time delay monitor and at least one time delay line.

[0049] Among them, among the multiple pulse light sources 11, each pulse light source 11 generates a pulse light beam, and the multiple light beams of the multiple pulse light sources 11 are projected onto the beam combiner after reflection and merged into one light beam, and the light beam merged by the beam combiner is projected into the light field control component, and the light field control component adjusts and aggregates the light beam and ionizes the air in the display area 50 to form a holographic real image.

[0050] The repetition frequency adjustment component is arranged between the pulse light source 11 and the beam combiner to adjust the repetition frequency of the multiple pulse light sources 11. The repetition frequency adjustment component is connected to the multiple pulse light sources 11 signals, and can receive the pulse repetition frequency signal of the light beams projected by the multiple pulse light sources 11, and then adjust the pulse light source 11 according to the received repetition frequency signal. The repetition frequency of the pulse light source 11 refers to the number of laser pulses generated by the pulse light source 11 per second. The repetition frequency adjustment component can strictly lock the pulse repetition frequency of the multiple light beams emitted by the multiple pulse light sources 11 to the same value.

[0051] The pulse time delay monitor is arranged between the beam combiner and the light field control component to monitor the pulse delay signal of the light beam emitted by the beam combiner. The paths of the light beams generated by different pulse light sources 11 to reach the beam combiner are different. For example, the light beam generated by one pulse light source 11 is irradiated onto the beam combiner in a straight line, and the light beam generated by another pulse light source 11 is first reflected once and then irradiated onto the beam combiner. As a result, there is a pulse time delay between the light beams generated by the two pulse light sources 11 after beam combining. Through a time delay line arranged between the pulse light source 11 and the beam combiner and connected to the pulse time delay monitor signal, the light beam generated by the pulse light source 11 is compensated for the pulse delay caused by the pulse transmission optical path difference and the low-frequency jitter of the repetition frequency according to the feedback signal of the pulse time delay monitor, so that the two pulses are synchronized in time after beam combining.

[0052] In the process of the light beams generated by multiple pulse light sources 11 passing through the beam combiner to form a light beam, the light beam generated by one pulse light source 11 can pass through the beam combiner, and the light beams generated by the remaining pulse light sources 11 can be combined with the light beam passing through the beam combiner after reflection. Therefore, the light beam passing through the beam combiner can be used as a reference to adjust the light beam that is combined after reflection.

[0053] At this time, the number of reflected light beams is one less than the number of pulse light sources 11, so the number of time delay lines is one less than the number of pulse light sources 11, and the time delay lines correspond one to one with the same number of pulse light sources 11, and each delay line controls the pulse delay of a light beam generated by a pulse light source 11, so that the light beams generated by multiple pulse light sources 11 can be combined into a pulse light beam when passing through the beam combiner, preventing the instantaneous power of the combined light beam from not being superimposed to the maximum due to the pulse delay after the combined light beam, thereby affecting the air ionization imaging.

[0054] According to some embodiments of the present invention, a repetition frequency adjustment component includes a plurality of photodetectors, a frequency reference source, and a servo controller.

[0055] Among them, there can be multiple photodetectors and the number is the same as the number of pulse light sources 11. The photodetectors are correspondingly arranged between the pulse light source 11 and the beam combiner to detect the repetition frequency of the pulse output from the pulse light source 11. The frequency reference source is used to provide a frequency reference standard for the servo controller. The servo controller signal connects the photodetector, the frequency reference source and the pulse light source 11. The light beam is projected on the photodetector corresponding to the pulse light source 11 to generate a feedback signal. The servo controller can control the repetition frequency of the pulse output from the pulse light source 11 according to the feedback signal of the photodetector. After the servo controller receives the repetition frequency parameters of the pulse output from the pulse light source 11 fed back by the photodetector, it compares them with the frequency parameters provided by the frequency reference source. If the repetition frequency parameters of the output pulse of the pulse light source 11 do not meet the requirements, the pulse light source 11 is adjusted until the repetition frequency parameters of the output pulse of the pulse light source 11 meet the requirements.

[0056] Other structures and operations according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0057] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0058] In the description of the present invention, "plurality" means two or more.

[0059] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0060] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0062] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air ionization display device, characterized in that: include: A plurality of pulse light output units, wherein the pulse light output units include: a pulse light source, a galvanometer assembly and a lens assembly, wherein the output light beam of the pulse light source ionizes the air in the focal area of ​​the lens assembly to form a holographic real image through the adjustment of the galvanometer assembly and the focusing of the lens assembly; Wherein, the holographic real images of the plurality of pulse light output units cooperate with each other to form a combined real image; a part of the plurality of pulse light output units form an upper pulse light output unit group, and another part of the plurality of pulse light output units form a lower pulse light output unit group, the holographic real image formed by the pulse light output units in the upper pulse light output unit group is located below the upper pulse light output unit group, and the holographic real image formed by the pulse light output units in the lower pulse light output unit group is located above the lower pulse light output unit group; The pulse light output unit further comprises: a housing, wherein the pulse light source, the galvanometer assembly and the lens assembly are all arranged in the housing, and a pulse output port is formed in a portion of the housing between the lens assembly and the focus of the lens assembly.

2. The air ionization display device according to claim 1, characterized in that: Also includes: A control computer, wherein the control computer signals are connected to the plurality of pulse light output units, and is used to control the imaging state of the holographic real image to form the combined real image.

3. The air ionization display device according to claim 1, characterized in that: In a plane direction perpendicular to a line connecting the holographic real image and the pulse light output unit, a plurality of the pulse light output units are arranged in a plurality of rows and columns.

4. The air ionization display device according to claim 1, characterized in that: The lens assembly comprises a zoom lens and a flat-field focusing lens, and the zoom lens is located between the flat-field focusing lens and the galvanometer assembly.

5. The air ionization display device according to claim 4, characterized in that: The pulse light output unit further includes: a spatial light modulator, which is located between the pulse light source and the galvanometer assembly and is used to adjust the parameters of the light beam.

6. The air ionization display device according to claim 1, characterized in that: The pulse width of the pulse light source is 50fs-100ns, the pulse energy of the pulse light source is 20μJ-10mJ, and the repetition frequency of the pulse light source is 500Hz-10MHz.

7. The air ionization display device according to claim 1, characterized in that: The pulse light source in the pulse light output unit is multiple, and the pulse light output unit further includes: A beam combining mirror, on which the beams of the plurality of pulse light sources are projected and combined into one beam, and the beam emitted by the beam combining mirror is projected into the galvanometer assembly; A repetition frequency adjustment component, the repetition frequency adjustment component is arranged between the pulse light source and the beam combining mirror and is used to adjust the repetition frequency of the multiple pulse light sources; A pulse time delay monitor, which is disposed between the beam combiner and the galvanometer assembly and is used to monitor a pulse delay signal of the light beam emitted by the beam combiner; At least one time delay line is provided between the pulse light source and the beam combiner and is connected to the pulse time delay monitor signal, and is used to compensate for the pulse delay of the light beam emitted by the pulse light source according to the feedback information of the pulse time delay monitor.

8. The air ionization display device according to claim 7, characterized in that: The repetition frequency adjustment component comprises: A plurality of photoelectric detectors, wherein the plurality of photoelectric detectors are arranged one by one between the plurality of pulse light sources for detecting the repetition frequency of the pulse light sources; A frequency reference source, the frequency reference source is used to provide a frequency reference standard; A servo controller, wherein the servo controller signal connects the photodetector, the frequency reference source and the pulse light source, and is used to control the output pulse repetition frequency of the pulse light source according to the feedback signal of the photodetector and the reference frequency signal of the frequency reference source.

Images