Air ionization display device

Abstract

The present invention discloses an air ionization display device, comprising: a plurality of pulse light sources, a beam combiner and a light field control component, wherein the light beams generated by the plurality of pulse light sources are projected onto the beam combiner to be combined into one light beam, and the light beam combined by the beam combiner is projected into the light field control component, and the light field control component adjusts and aggregates the light beams and ionizes the air in the display area to form a holographic real image. According to the air ionization display device of an embodiment of the present invention, by increasing the number of pulse light sources and using a beam combiner to combine the light beams of the plurality of pulse light sources and compensate for the time delay between the pulses, it can be ensured that the plurality of pulses output by the plurality of pulse light sources appear at the same position and at the same time in the display area and ionize the air, that is, the problem of spatial synchronization and temporal synchronization between the plurality of pulses output by the multi-pulse light sources is solved, and the pixels of the air ionization display screen can be increased by multiples, bringing a good user experience to the user.

Description

Technical Field

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

[0002] During the imaging process, the air ionization imaging system uses a lens to converge the light beam and ionize the air at the focus of the lens to form a light spot. Since the light power threshold per unit area of ​​the pulse required for air ionization is relatively high, the number of focal points formed by modulating the light field by the spatial light modulator at each ionization point is limited by the pulse power, that is, the pixels of the displayed image are subject to the size of the pulse power. If the pixels of the displayed image are to be increased, the output pulse power of the light source needs to be further increased. However, it is difficult to significantly increase the output pulse power of the light source with the existing technology, resulting in difficulty in increasing the pixels of the air ionization system display. 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 provides an air ionization display device, which can increase the number of pulse light sources, merge the output light beams of multiple light sources, and adjust the pulse delay to achieve pulse synchronization, thereby improving the pixels of the air ionization display screen.

[0004] According to an embodiment of the present invention, the air ionization display device includes: multiple pulse light sources, a beam combining mirror and a light field control component. The light beams generated by the multiple pulse light sources are projected onto the beam combining mirror to be combined into one light beam. The light beam combined by the beam combining mirror is projected into the light field control component. The light field control component adjusts and aggregates the light beams and ionizes the air in the display area to form a holographic real image.

[0005] According to the air ionization display device of the embodiment of the present invention, by increasing the number of pulse light sources and using a beam combiner to merge the light beams of multiple pulse light sources, it can ensure that the multiple pulses output by the multiple pulse light sources appear at the same position and at the same time in the display area and ionize the air, that is, the problem of spatial synchronization and temporal synchronization between the multiple pulses output by the multi-pulse light sources is solved, and the pixels of the air ionization display screen can be increased exponentially, which brings a good user experience.

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

[0007] According to some embodiments of the present invention, it further includes: a repetition frequency adjustment component, which is arranged between the pulse light source and the beam combiner to adjust the repetition frequency of the multiple pulse light sources.

[0008] 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, wherein the plurality of photodetectors are arranged one-to-one between the plurality of pulse light sources and the beam combiner 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 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.

[0009] According to some embodiments of the present invention, a first beam splitter is provided between the pulse light source and the beam combiner, and a plurality of the first beam splitters reflect partial light beams of a plurality of the pulse light sources onto a plurality of the photodetectors in a one-to-one correspondence.

[0010] According to some embodiments of the present invention, the transmittance of the first beam splitter is A1, 99%≤A1≤99.5%; the reflectivity of the first beam splitter is A2, 0.5%≤A2≤1%.

[0011] According to some embodiments of the present invention, it also includes: a pulse time delay monitor and at least one time delay line, wherein 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 time delay line is arranged 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.

[0012] According to some embodiments of the present invention, the number of the time delay lines is one less than the number of the pulse light sources, and the delay lines correspond one-to-one to the same number of the pulse light sources.

[0013] According to some embodiments of the present invention, a second beam splitter is provided between the beam combining mirror and the light field regulating component, and the second beam splitter reflects a part of the light beam emitted by the beam combining mirror to the pulse time delay monitor.

[0014] According to some embodiments of the present invention, the transmittance of the second beam splitter is A3, 98%≤A3≤99.5%, and the reflectivity of the second beam splitter is A4, 0.5%≤A4≤2%.

[0015] According to some embodiments of the present invention, there are multiple beam combining mirrors, and the number of the beam combining mirrors is one less than the number of the pulse light sources. The multiple beam combining mirrors are arranged at intervals along the output light beams of one of the pulse light sources, and the output light beams of the remaining pulse light beams are projected onto the multiple beam combining mirrors one by one, and the output light beams of the multiple pulse light sources are combined into one light beam.

[0016] According to some embodiments of the present invention, the system further includes: a plurality of reflectors, wherein the reflectors are disposed between the pulse light source and the beam combiner and are used to reflect the output light beams of the pulse light source onto the beam combiner.

[0017] According to some embodiments of the present invention, the number of the reflectors is one less than the number of the pulse light sources.

[0018] According to some embodiments of the present invention, the repetition frequency of the multiple pulse light sources is the same, 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.

[0019] According to some embodiments of the present invention, the light field control component includes: a galvanometer assembly, a lens assembly and a spatial light modulator. The outgoing light beam of the beam combiner is projected onto the galvanometer assembly, and the galvanometer assembly adjusts the direction of the light beam; the outgoing light beam of the galvanometer assembly is projected onto the lens assembly, and the lens assembly focuses the light beam at the focal position of the lens assembly to ionize the air to form a real image, and the spatial light modulator is located between the beam combiner and the galvanometer assembly and is used to adjust the parameters of the light beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] 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:

[0022] Figure 1 A schematic structural diagram of a dual-light source air ionization display device according to an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of a three-light source air ionization display device according to another embodiment of the present invention.

[0024] Reference numerals:

[0025] 1: Photodetector;

[0026] 11: first photodetector; 12: second photodetector; 13: third photodetector;

[0027] 2: Servo controller;

[0028] 21: first servo controller; 22: second servo controller; 23: third servo controller;

[0029] 3: Pulse light source;

[0030] 31: first pulse light source; 32: second pulse light source; 33: third pulse light source;

[0031] 41: frequency reference source; 42: controller; 43: pulse time delay monitor; 44: light field control component;

[0032] 5: Display area;

[0033] 6: Time delay line;

[0034] 61: first time delay line; 62: second time delay line; 63: third time delay line;

[0035] 7: Reflector;

[0036] 71: first reflector; 72: second reflector;

[0037] 8: beam combiner;

[0038] 81: first beam combining mirror; 82: second beam combining mirror;

[0039] 9: beam splitter;

[0040] 91: first middle beam splitter; 92: first lower beam splitter; 93: first upper beam splitter; 94: second beam splitter. DETAILED DESCRIPTION

[0041] 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.

[0042] Reference below Figure 1-Figure 2 A display device based on air ionization according to an embodiment of the present invention is described.

[0043] The air ionization display device according to the embodiment of the present invention includes: a plurality of pulse light sources 3 , a beam combiner 8 , a light field control component 44 and a controller 42 .

[0044] Among them, among the multiple pulse light sources, each pulse light source 3 generates a pulse light beam, and the multiple light beams of the multiple pulse light sources 3 are projected onto the beam combiner 8 after refraction and reflection and merged into one light beam. The light beam merged by the beam combiner 8 is projected into the light field control component 44, and the light field control component 44 adjusts and aggregates the light beam and ionizes the air in the display area 5 to form a real image.

[0045] The light field control component 44 can change the direction of the light beam and can focus the light beam using a lens. The energy of the light beam is concentrated at the focus, which will ionize the air. As the direction of the light beam swings, the position of the ionization point changes accordingly, thereby forming a holographic real image. The controller 42 can be a control computer for controlling the operation and adjustment of different components in the air ionization display device.

[0046] In the air ionization display device in the prior art, a single pulse light source 3 is mostly used. Due to the limited power of the pulse light source 3, the pixels of the display screen cannot meet the user's usage requirements. If the pixels of the display screen are to be improved and the image clarity is to be increased, the output pulse power of the pulse light source 3 needs to be further increased. Since it is difficult to significantly increase the output pulse power of the pulse light source 3 in the prior art, it is difficult to increase the pixels of the display screen of the air ionization display device.

[0047] Therefore, according to the air ionization display device of the embodiment of the present invention, by increasing the number of pulse light sources 3 and using the beam combiner 8 to merge the light beams of multiple pulse light sources 3, it can ensure that the multiple pulses output by the multiple pulse light sources 3 appear at the same position and at the same time in the display area and ionize the air, that is, the problem of spatial synchronization and temporal synchronization between the multiple pulses output by the multiple pulse light sources 3 is solved, and the pixels of the air ionization display screen can be increased exponentially, which brings a good user experience.

[0048] like Figure 1 As shown, in some specific embodiments, the air ionization display device further includes a repetition frequency adjustment component, which is disposed between the pulse light source 3 and the beam combiner 8 and is used to adjust the repetition frequency of the multiple pulse light sources 3. The repetition frequency adjustment component is connected to the multiple pulse light sources 3 signals, and can receive the repetition frequency signal of the light beams projected by the multiple pulse light sources 3, and then adjust the pulse light sources 3 according to the received repetition frequency signal.

[0049] The repetition frequency of the pulse light source 3 refers to the number of light pulses output by the pulse light source per second. The repetition frequency adjustment component can adjust the repetition frequency of multiple pulses emitted by multiple pulse light sources.

[0050] The display device requires a pulse light source 3 with the same repetition frequency. Even so, each pulse light source output pulse will produce different repetition frequency jitters due to the influence of internal and external factors of the laser. At this time, a repetition frequency adjustment component is set to lock the output pulse repetition frequencies of multiple pulse light sources to the same value.

[0051] According to the air ionization display device of the embodiment of the present invention, the repetition frequency adjustment component includes: a photodetector 1 , a frequency reference source 41 and a servo controller 2 .

[0052] There can be multiple photodetectors 1 and the number is the same as the number of pulse light sources 3, such as Figure 1 As shown, in this embodiment, there are two pulse light sources 3 and two photodetectors 1, the two pulse light sources 3 are respectively a first pulse light source 31 and a second pulse light source 32; the two photodetectors 1 are respectively a first photodetector 11 and a second photodetector 12. The first photodetector 11 is correspondingly arranged between the first pulse light source 31 and the beam combining mirror 8 for detecting the repetition frequency of the pulse output by the first pulse light source 31, and the second photodetector 12 is correspondingly arranged between the second pulse light source 32 and the beam combining mirror 8 for detecting the repetition frequency of the pulse output by the second pulse light source 32.

[0053] The servo controller 2 is signal-connected to the photodetector 1 , the frequency reference source 41 and the pulse light source 3 . The frequency reference source 41 is used to provide a frequency reference standard for the servo controller 2 .

[0054] The servo controller 2 is connected to the first photodetector 11, the frequency reference source 41, the first pulse light source 31, the second photodetector 12 and the second pulse light source 32. When the light beam is irradiated onto the photodetector 1 corresponding to the pulse light source 3, a pulse repetition frequency signal will be generated. The servo controller 2 can control the output pulse repetition frequency of the pulse light source 3 according to the feedback signal of the photodetector 1 and the reference frequency signal of the frequency reference source 41.

[0055] Specifically, after the servo controller 2 receives the repetition frequency parameters of the output pulse of the first pulse light source 31 fed back by the first photodetector 11, it compares them with the frequency parameters provided by the frequency reference source 41. If the output pulse of the first pulse light source 31 does not meet the parameter requirements, the first pulse light source 31 is adjusted until the output pulse of the first pulse light source 31 meets the requirements; similarly, the servo controller 2 adjusts the output pulse repetition frequency parameters of the second pulse light source 32 according to the frequency reference source and the second photodetector 12.

[0056] According to some specific embodiments of the present invention, a first beam splitter is provided between the pulse light source 3 and the beam combining mirror 8, and the first beam splitter 91 correspondingly reflects part of the light beam of the first pulse light source 31 to the first photodetector 11, wherein there may be multiple first beam splitters, and the multiple first beam splitters correspond one to one to the multiple pulse light sources 3, for example, Figure 1 As shown, there may be two first beam splitters, namely, a first middle beam splitter 91 and a first lower beam splitter 92. The light beam generated by the first pulse light source 31 will be split into two light beams through the first middle beam splitter 91, one light beam is projected onto the first photodetector 11 for detecting the repetition frequency of the light beam generated by the first pulse light source 31, and the other light beam is projected onto the beam combiner 8; similarly, the light beam generated by the second pulse light source 32 will be split into two light beams through the first lower beam splitter 92, one light beam is projected onto the second photodetector 12 for detecting the repetition frequency of the light beam generated by the second pulse light source 32, and the other light beam is projected onto the beam combiner 8. The servo controller 2 adjusts the actual output pulse repetition frequency parameters of the first pulse light source 31 and the second pulse light source 32 according to the feedback signals of the first photodetector 11 and the second photodetector 12.

[0057] like Figure 2 As shown, in some specific embodiments, there are three first beam splitters, namely: a first upper beam splitter 93, a first middle beam splitter 91 and a first lower beam splitter 92, there are three pulse light sources, namely: a first pulse light source 31, a second pulse light source 32 and a third pulse light source 33, there are three photodetectors 1, namely: a first photodetector 11, a second photodetector 12 and a third photodetector 13, the first middle beam splitter 91 reflects part of the light beam generated by the first pulse light source 31 onto the first photodetector 11, the first lower beam splitter 92 reflects part of the light beam generated by the second pulse light source 32 onto the second photodetector 12, and the first upper beam splitter 93 reflects part of the light beam generated by the third pulse light source 33 onto the third photodetector 13.

[0058] In some specific embodiments, the transmittance of the first beam splitter is A1, 99%≤A1≤99.5%, and the reflectance of the first beam splitter is A2, 0.5%≤A2≤1%. The light beam generated by the pulse light source 3 passes through the beam splitter 9, a part of which is reflected on the photodetector 1 for detecting the repetition frequency parameter of the light beam, and the other part is projected onto the beam combiner 8 through the first beam splitter. When the photodetector 1 detects the repetition frequency parameter of the light beam, the energy requirement of the detection light beam is relatively low, and a small part of the light can complete the detection of the repetition frequency. Therefore, setting the transmittance and reflectance of the first beam splitter within the above range can not only ensure that the photodetector 1 can stably and accurately detect the repetition frequency of the light beam, but also increase the proportion of the light beam energy irradiated on the beam combiner 8. The vast majority of the light beams pass through the beam splitter 9 and irradiate the beam combiner 8 and then irradiate the light field control component 44 for imaging, which is conducive to further improving the pixels of the holographic real image.

[0059] As shown in the figure, in this embodiment, the air ionization display device further includes: a pulse time delay monitor 43 and at least one time delay line 6.

[0060] The pulse time delay monitor 43 is arranged between the beam combiner 8 and the light field control component 44 to monitor the pulse delay signal of the light beam emitted by the beam combiner 8. The paths of the light beams generated by different pulse light sources 3 to reach the beam combiner 8 are different. For example, the light beam generated by the second pulse light source 32 is irradiated onto the beam combiner 8 in a straight line, and the light beam generated by the first pulse light source 31 is irradiated onto the beam combiner 8 after one reflection, so that the light beams generated by the two pulse light sources 3 have a pulse delay after being combined. Through a time delay line 61 arranged between the pulse light source 31 and the beam combiner 8 and connected to the signal of the pulse time delay monitor 43, and according to the feedback signal of the pulse time delay monitor 43, the light beam generated by the pulse light source 31 is compensated for the pulse delay caused by the pulse transmission optical path difference and the low-frequency jitter of the repetition frequency, so that the two pulses are synchronized in time after being combined.

[0061] As shown in the figure, according to some embodiments of the present invention, in the process of the light beams generated by multiple pulse light sources 3 passing through the beam combiner 8 to form a light beam, the light beam generated by one pulse light source 3 can pass through the beam combiner 8, and the light beams generated by the remaining pulse light sources 3 can be combined with the light beam passing through the beam combiner after reflection, so that the light beam passing through the beam combiner 8 can be used as a reference to adjust the light beam that is combined after reflection.

[0062] At this time, the number of reflected light beams is one less than the number of pulse light sources 3, so the number of time delay lines 6 is one less than the number of pulse light sources 3, and the time delay lines 6 correspond one-to-one to the same number of pulse light sources 3. Each time delay line 6 controls the pulse delay in the light beam generated by a pulse light source 3, so that the light beams generated by multiple pulse light sources 3 can be synthesized into a pulse light beam when passing through the beam combiner 8, and the pulse time can be synchronized to avoid the situation where the air cannot be ionized due to pulse delay after the light beams are combined.

[0063] As shown in the figure, according to some embodiments of the present invention, a second beam splitter 94 is provided between the beam combiner and the light field control component 44. The second beam splitter 94 divides a light beam generated by the beam combiner 8 into two parts. One part is projected onto the light field control component 44 through the second beam splitter 94, and the light field control component 44 ionizes the air to form the pattern required by the user. The other part is reflected onto the pulse time delay monitor 43 through the second beam splitter 94, and the pulse time delay monitor 43 feeds back information to the controller 42 and the time delay line 6 to control the pulse delay of the output light beam of the pulse light source 31. The second beam splitter 94 can be provided to facilitate the pulse time delay monitor 43 to obtain the pulse delay information after beam combining, and the structure is simple and easy to implement.

[0064] According to some specific embodiments of the present invention, the transmittance of the second beam splitter 94 is A3, 98%≤A3≤99.5%, and the reflectance of the second beam splitter 94 is A4, 0.5%≤A4≤2%. When the pulse time delay monitor 43 detects the delay parameters of the light beam, the energy requirement of the detection light beam is relatively low, and a small part of the light can complete the detection of the pulse delay. Therefore, setting the transmittance and reflectance of the second beam splitter within the above range can not only ensure that the pulse time delay monitor can stably and accurately detect the delay information of the light beam, but also increase the proportion of the light beam energy irradiated on the light field control component 44. The vast majority of the light beams pass through the beam splitter 9 and irradiate on the light field control component 44 for imaging, which is conducive to further improving the pixels of the holographic real image.

[0065] As shown in the figure, in some specific embodiments, there are multiple beam combiners 8, and the number of beam combiners 8 can be one less than the number of pulse light sources 3. The multiple beam combiners 8 are arranged at intervals along the output light beam of one of the pulse light sources 3, and the light beams generated by the remaining pulse light sources 3 are projected onto the multiple beam combiners 8 one by one, and the output light beams of the multiple pulse light sources 3 are combined into one light beam through the multiple beam combiners 8.

[0066] As shown in the figure, multiple beam combining mirrors 8 are arranged parallel to each other, and the light beam generated by one of the multiple pulse light sources passes through the multiple beam combining mirrors 8 in sequence, and the light beams generated by the remaining pulse light sources are irradiated on the multiple beam combining mirrors 8 one by one, and are combined with the light beam passing through the beam combining mirror 8 under the reflection action of the beam combining mirror 8.

[0067] By providing a plurality of beam combining mirrors 8, the combining method of the plurality of pulse light sources 3 can be simplified, thereby simplifying the structural design of the air ionization display device, and at the same time reducing the loss caused in the beam combining process.

[0068] As shown in the figure, according to some embodiments of the present invention, the air ionization display device also includes: a plurality of reflectors 7, the reflectors 7 are arranged between the pulse light source 3 and the beam combiner 8, and are used to reflect the pulse light beams to the beam combiner 8 for merging. By setting the reflectors 7, a plurality of parallel light beams can be reflected to the beam combiner 8, thereby providing convenience for the setting of the plurality of pulse light sources 3, and reducing the distance between the plurality of pulse light sources 3, which is conducive to reducing the overall structure of the air ionization display device.

[0069] Further, as shown in the figure, the number of reflectors 7 is one less than the number of pulse light sources 3. Among the multiple pulse light sources 3, the light beam generated by one pulse light source 3 passes through the beam combiner 8, and the light beams generated by the remaining pulse light sources 3 are combined with the light beams passing through the beam combiner 8 after being reflected by the beam combiner 8. The light beam passing through the beam combiner 8 does not need a reflection structure and can be directly irradiated on the beam combiner 8. The light beams generated by the remaining pulse light sources 3 are irradiated on the beam combiner 8 after being reflected by the reflector 7. In this way, one reflector 7 can be reduced, and the structural design of the air ionization display device can be further simplified.

[0070] In this embodiment, the repetition frequencies of multiple pulse light sources are the same, 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, thereby improving the imaging effect and pixels of the holographic real image.

[0071] According to the air ionization display device of the embodiment of the present invention, the light field control component 44 includes: a galvanometer component, a lens component and a spatial light modulator. The outgoing light beam of the beam combiner 8 is projected onto the galvanometer component. The galvanometer component includes two groups of reflectors arranged vertically. The two groups of reflectors swing forward and backward and left and right respectively, thereby controlling the irradiation path of the light beam. The outgoing light beam of the galvanometer component is projected onto the lens component, and the lens component focuses the light beam. After the light beam is concentrated at the focal position of the lens component, the power density increases and reaches the power threshold for generating ionization. Finally, the high-power laser ionizes the air molecules to form a luminous bright spot, and then forms the real image required by the user.

[0072] The spatial light modulator is located between the beam combiner and the galvanometer assembly. It achieves the purpose of light wave modulation by modulating the amplitude, phase, polarization state and other parameters of the light. The light beam modulates the light field through the spatial light modulator and forms multiple focal points after passing through the focusing system, thereby increasing the pixels of the display screen.

[0073] The lens assembly includes: a zoom lens and a flat-field focusing lens. The zoom lens is located between the flat-field focusing lens and the galvanometer assembly. The high-power pulse light source outputs laser pulses, which are modulated by the spatial light modulator and then reflected to the galvanometer assembly to adjust its emission direction. The light beam passes through the zoom lens and the 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 luminous bright spot.

[0074] The zoom lens can adjust the distance between the focus and the zoom lens according to the imaging requirements, and then generate a real image of a three-dimensional structure by adjusting the focus position. By using a flat-field focusing lens in conjunction with the zoom lens, the generated real image can be prevented from bending and deforming during the imaging process. The controller 42 actively controls the spatial light modulator, the galvanometer assembly, and the lens assembly to adjust the position of the laser ionization point and the pixels of the display image according to the image to be displayed.

[0075] 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.

[0076] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0077] In the description of the present invention, "plurality" means two or more.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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: Multiple pulse light sources; A beam combining mirror, on which the light beams generated by the plurality of pulse light sources are projected and combined into one light beam; A light field regulation component, into which the light beams combined by the beam combiner are projected, and the light field regulation component adjusts and aggregates the light beams and ionizes the air in the display area to form a holographic real image; A repetition frequency adjustment component, which is arranged between the pulse light source and the beam combining mirror and is used to adjust the repetition frequency of the pulses output by the multiple pulse light sources; There are multiple beam combining mirrors, and the multiple beam combining mirrors are arranged parallel to each other. The light beam generated by any one of the multiple pulse light sources passes through the multiple beam combining mirrors in sequence, and the light beams generated by the remaining pulse light sources are irradiated on the multiple beam combining mirrors one by one, and are combined with the light beams passing through the multiple beam combining mirrors into one light beam under the reflection effect of the multiple beam combining mirrors.

2. The air ionization display device according to claim 1, 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 and the beam combining mirror 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 repetition frequency of the pulse output by the pulse light source according to the pulse repetition frequency signal received by the photodetector and the reference frequency of the frequency reference source.

3. The air ionization display device according to claim 2, characterized in that: A first beam splitter is provided between the pulse light source and the beam combining mirror, and a plurality of the first beam splitters reflect partial light beams of a plurality of the pulse light sources to a plurality of the photoelectric detectors in a one-to-one correspondence.

4. The air ionization display device according to claim 3, characterized in that: The transmittance of the first beam splitter is A1, 99%≤A1≤99.5%; the reflectivity of the first beam splitter is A2, 0.5%≤A2≤1%.

5. The air ionization display device according to claim 1, characterized in that: Also includes: A pulse time delay monitor, which is disposed between the beam combiner and the light field control component and is used to monitor a pulse delay signal of the light beam emitted by the beam combiner; At least one time delay line, which is arranged between the pulse light source and the beam combiner and connected to the pulse time delay monitor signal, and is used to compensate the pulse delay of the output light beam of the pulse light source according to the feedback information of the pulse time delay monitor.

6. The air ionization display device according to claim 5, characterized in that: The number of the time delay lines is one less than the number of the pulse light sources, and the delay lines correspond one-to-one to the same number of the pulse light sources.

7. The air ionization display device according to claim 6, characterized in that: A second beam splitter is provided between the beam combining mirror and the light field regulating component, and the second beam splitter reflects part of the light beam emitted from the beam combining mirror to the pulse time delay monitor.

8. The air ionization display device according to claim 7, characterized in that: The transmittance of the second beam splitter is A3, 98%≤A3≤99.5%, and the reflectivity of the second beam splitter is A4, 0.5%≤A4≤2%.

9. The air ionization display device according to any one of claims 1 to 8, characterized in that: The number of the beam combining mirrors is one less than the number of the pulse light sources, and the multiple beam combining mirrors are arranged at intervals along the output light beam of one of the pulse light sources, and the output light beams of the remaining pulse light sources are projected onto the multiple beam combining mirrors one by one, and the output light beams of the multiple pulse light sources are combined into one light beam.

10. The air ionization display device according to any one of claims 1 to 8, characterized in that: Also includes: A plurality of reflectors are provided between the pulse light source and the beam combining mirror, and are used for reflecting the transmitted light beam of the pulse light beam onto the beam combining mirror.

11. The air ionization display device according to claim 10, characterized in that: The number of the reflecting mirrors is one less than the number of the pulse light sources.

12. The air ionization display device according to any one of claims 1 to 8, characterized in that: The repetition frequency of the multiple pulse light sources is the same, 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.

13. The air ionization display device according to any one of claims 1 to 8, characterized in that: The light field control component comprises: A galvanometer assembly, onto which the outgoing light beam of the beam combiner is projected, and the galvanometer assembly adjusts the direction of the light beam; A lens assembly, onto which the outgoing light beam of the galvanometer assembly is projected, and the lens assembly focuses the light beam at a focal position of the lens assembly to ionize the air and form a real image; A spatial light modulator is located between the beam combining mirror and the galvanometer assembly and is used to adjust the parameters of the light beam.

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