4K imaging method and infrared thermal imaging system

Abstract

The application discloses a 4K imaging method and an infrared thermal imaging system, relates to the technical field of infrared thermal imaging, and comprises an infrared thermal image acquisition unit, a visible light image acquisition unit, an image fusion module, an XPR dithering unit, a control unit and a display chip; in the region of the thermal radiation target in the projection display, the thermal infrared image of the thermal radiation target and the non-synchronous frame display of the visible light image of the thermal radiation target are formed; through the visual persistence effect formed by the XPR dithering unit, the user can obtain the different characteristics of the thermal infrared image and the visible light image displayed in the display region of the thermal radiation target; in the case that the thermal infrared information of the thermal radiation target is acquired, the visible light details of the thermal radiation target can be observed more timely, and the user is more convenient to judge the situation; in the region of the thermal radiation target outside the projection display, the corresponding multi-pixel display of the visible light image is formed, the resolution is improved, and the display cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of infrared thermal imaging technology, and particularly relates to a 4K imaging method and an infrared thermal imaging system. BACKGROUND

[0002] An infrared thermal imager is a device that converts the temperature distribution image of a target into a visible image by means of infrared thermal imaging technology, signal processing, photoelectric conversion and other means through infrared radiation detection of the target. The working principle of the infrared thermal imager is based on the principle that all objects above absolute zero (-273℃) will emit infrared radiation. The thermal imager uses an infrared detector and an optical imaging objective lens to receive the infrared radiation energy distribution pattern of the measured target, which is reflected to the photosensitive element of the infrared detector, so as to obtain an infrared thermal image. This thermal image corresponds to the thermal distribution field of the object surface. By viewing the thermal image, the overall temperature distribution of the measured target can be observed, and the heating condition of the target can be studied, so that the next step of work can be judged.

[0003] The fusion video of thermal infrared and visible light generated by the current infrared thermal imager mainly replaces the image of the thermal radiation target in each frame of visible light with the target image of the thermal radiation target obtained from the infrared thermal image at the same time, obtains a plurality of fusion images, and then plays the fusion images frame by frame to form a fusion video. When a user views the fusion video, only the outline of the thermal radiation target and the thermal infrared image corresponding to the target outline can be seen, and the action details of the thermal radiation target cannot be observed well.

[0004] This cannot combine the observable visible light condition with the unobservable thermal radiation condition to make a situation judgment in a more timely manner for some infrared thermal imaging systems that need to monitor or observe the target area in real time. SUMMARY

[0005] The present application is aimed at providing a solution to the above technical problems.

[0006] In order to achieve the above object, the present application provides the following technical scheme: an infrared thermal imaging display system, comprising an infrared thermal image acquisition unit, a visible light image acquisition unit, an image fusion module, an XPR dithering unit, a control unit and a display chip; the infrared thermal image acquisition unit is used for acquiring an infrared thermal image of a target scene; the visible light image acquisition unit is used for acquiring a visible light image of the target scene; the image fusion module is used for extracting a region image of a thermal radiation target from the acquired infrared thermal image, and fusing the extracted region image of the thermal radiation target with the visible light image to obtain a fused image; a controller of the control unit is configured to project and display the fused image obtained by the image fusion module and the visible light image acquired by the visible light image acquisition unit through the display chip, and control the XPR dithering unit to drive the display chip to dither when the projection and display is controlled; during each XPR dithering cycle, the display chip displays at least 2 frames of display images, and the displayed multiple frames of images include at least 1 frame of fused image and at least 1 frame of visible light image.

[0007] As a further scheme of the present application: the display chip is a 0.47DMD display chip; the XPR dithering unit is configured to move the display chip by half a pixel point in the order of up, right, down and left each time to form an XPR dithering cycle, so that 4 visual persistence pixel points of the same pixel point are formed at different positions, each micromirror on the display chip participates in the imaging of the 4 visual persistence pixel points at a frequency of 240Hz, and the contents displayed by 2 of the visual persistence pixel points are corresponding fused images, and the contents displayed by the other 2 visual persistence pixel points are corresponding visible light images.

[0008] As a further scheme of the present application: the contents displayed by the visual persistence pixel points in the up direction and the visual persistence pixel points in the down direction are corresponding images of the same type; the contents displayed by the visual persistence pixel points in the left direction and the visual persistence pixel points in the right direction are corresponding images of the same type.

[0009] As a further scheme of the present application: the display chip is a 0.66DMD display chip; the XPR dithering unit is configured to move the display chip in the order of right up and left down to form an XPR dithering cycle, so that 2 visual persistence pixel points of the same pixel point are formed at different positions, each micromirror on the display chip participates in the imaging of the 2 visual persistence pixel points, and the content displayed by 1 of the visual persistence pixel points is a corresponding visible light image, and the content displayed by the other 1 visual persistence pixel point is a corresponding fused image.

[0010] As a further scheme of the present application: the contents displayed by the visual persistence pixel points in the same direction in different XPR dithering cycles are corresponding visible light images or corresponding fused images.

[0011] The application further provides a 4K imaging method, which comprises

[0012] acquiring an infrared thermal image of a target scene and a visible light image of the target scene;

[0013] generating a fusion image of a region image of a thermal radiation target in the infrared thermal image and the visible light image;

[0014] controlling a display chip to project and display the fusion image and the visible light image;

[0015] controlling an XPR dithering unit to drive the display chip to dither when the projection and display are performed;

[0016] in the process of completing each XPR dithering cycle, the display chip displays at least two frames of display images, and the multiple frames of images displayed in each XPR dithering cycle include at least one frame of fusion image and at least one frame of visible light image.

[0017] As a further scheme of the application, the display chip is a 0.47DMD display chip, the XPR dithering unit is an XPR dithering cycle formed by rapidly moving the display chip by half a pixel point in the order of up, right, down and left, so that four visual persistence pixels of the same pixel point are formed at different positions, each micromirror on the display chip participates in the imaging of the four visual persistence pixels at a frequency of 240Hz, and the contents displayed by two of the visual persistence pixels are the corresponding fusion image, and the contents displayed by the other two visual persistence pixels are the corresponding visible light image.

[0018] As a further scheme of the application, the contents displayed by the visual persistence pixels in the up direction and the visual persistence pixels in the down direction are the corresponding images of the same type, and the contents displayed by the visual persistence pixels in the left direction and the visual persistence pixels in the right direction are the corresponding images of the same type.

[0019] As a further scheme of the application, the display chip is a 0.66DMD display chip, the XPR dithering unit is an XPR dithering cycle formed by rapidly moving the display chip in the order of right up and left down, so that two visual persistence pixels of the same pixel point are formed at different positions, each micromirror on the display chip participates in the imaging of the two visual persistence pixels, and the content displayed by one of the visual persistence pixels is the corresponding visible light image, and the content displayed by the other visual persistence pixel is the corresponding fusion image.

[0020] As a further scheme of the application, the contents displayed by the visual persistence pixels in the same direction in different XPR dithering cycles are the corresponding visible light images or the corresponding fusion images.

[0021] Compared with the prior art, the beneficial effects of the technical scheme are that: in the projection display, the area where the heat radiation target is located, the corresponding heat infrared image formed by the heat radiation target and the non-synchronous frame display of the visible light image of the heat radiation target, and the visual persistence effect formed by the XPR shaking unit, so that the user can obtain the different characteristics of the heat radiation target displayed by the heat infrared image and the visible light image in the display area where the heat radiation target is located, in the case of obtaining the heat infrared information of the heat radiation target, the visible light details of the heat radiation target can be observed more timely, which is more beneficial for the user to judge the situation, such as whether it is a dangerous situation; in the projection display, the area outside the heat radiation target, corresponding to the multi-pixel display of the visible light image, the resolution is improved while the display cost is effectively reduced.

[0022] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor.

[0024] Fig. 1 is the circuit block diagram of the infrared thermal imaging display system of the present application;

[0025] Fig. 2 is the structural schematic diagram of the XPR shaking unit in the present application;

[0026] Fig. 3 is the flow chart of the 4K imaging method in the present application.

[0027] The corresponding reference signs in the drawings are explained as follows:

[0028] Infrared thermal image acquisition unit-1, visible light image acquisition unit-2, image fusion module-3, XPR shaking unit-4, control unit-5, display chip-6,

[0029] First x-axis guide rail-401, second x-axis guide rail-402, first y-axis guide rail-403, second y-axis guide rail-404, sliding block-405, redundant part-405a, first coil-406, first magnet-407, second coil-408, second magnet-409, third coil-410, third magnet-411, fourth coil-412, fourth magnet-413. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0031] Please refer to Figs. 1-3 An infrared thermal imaging display system comprises an infrared thermal image acquisition unit 1, a visible light image acquisition unit 2, an image fusion module 3, an XPR dithering unit 4, a control unit 5 and a display chip 6.

[0032] The infrared thermal image acquisition unit 1 is configured to acquire an infrared thermal image of a target scene; the visible light image acquisition unit 2 is configured to acquire a visible light image of the target scene; and the image fusion module 3 is configured to extract a region image of a thermal radiation target from the acquired infrared thermal image, and fuse the extracted region image of the thermal radiation target with the visible light image to obtain a fused image.

[0033] The controller of the control unit 5 is configured to project and display the fused image obtained by the image fusion module 3 and the visible light image acquired by the visible light image acquisition unit 2 through the display chip 6, and control the XPR dithering unit 4 to drive the display chip 6 to dither when the projection and display is controlled.

[0034] During each XPR dithering cycle, the display chip 6 displays at least two frames of display images, and the displayed multiple frames of images include at least one frame of fused image and at least one frame of visible light image.

[0035] In the projection and display, the region where the thermal radiation target is located corresponds to the non-same frame display of the thermal infrared image of the thermal radiation target and the visible light image of the thermal radiation target, and the visual persistence effect formed by the XPR dithering unit 4 enables the user to obtain the different characteristics of the thermal radiation target displayed by the thermal infrared image and the visible light image in the display region where the thermal radiation target is located, and in the case of acquiring the thermal infrared information of the thermal radiation target, the visible light details of the thermal radiation target can be observed more timely, which is more conducive to the user to judge the situation, such as whether it is a dangerous situation.

[0036] In the projection and display, the region other than the thermal radiation target corresponds to the multi-pixel display of the visible light image, so that the resolution is also improved.

[0037] In some embodiments, the XPR dithering unit 4 comprises a guide rail slider platform having an x-axis moving direction and a y-axis moving direction, the x-axis moving direction corresponds to the left-right direction, and the y-axis moving direction corresponds to the up-down direction.

[0038] The XPR jitter unit 4 also has an x-axis drive assembly for driving the slider 405 of the guide rail slider platform to move in the left-right direction, and a y-axis drive assembly for driving the slider 405 of the guide rail slider platform to move in the up-down direction. The x-axis drive assembly and the y-axis drive assembly constitute a drive assembly capable of simultaneously driving the slider 405 of the guide rail slider platform to move.

[0039] As shown in FIG. 1, Fig. 2 In some embodiments, the guide rail slider platform has a first x-axis guide rail 401 matched with the upper part of the slider 405, a second x-axis guide rail 402 matched with the lower part of the slider 405, a first y-axis guide rail 403 matched with the left part of the slider 405, and a second y-axis guide rail 404 matched with the right part of the slider 405.

[0040] The first x-axis guide rail 401 and the second x-axis guide rail 402 have x-axis guide grooves extending through up and down and extending through left and right, and the first y-axis guide rail 403 and the second y-axis guide rail 404 have y-axis guide grooves extending through left and right and extending through up and down.

[0041] The left and right extension design of the x-axis guide groove is used to provide sliding guidance for the slider 405 when the x-axis drive assembly drives the slider 405, and the left and right through design of the y-axis guide groove is used to enable the left part of the slider 405 and the right part of the slider 405 to move left and right following the corresponding y-axis guide groove when the slider 405 moves left and right, avoiding jamming.

[0042] That is, the left part of the slider 405 and the right part of the slider 405 actually have redundant parts 405a that slide with the corresponding y-axis guide groove. When the slider 405 moves to the right, the redundant part of the left part of the slider 405 can move to the right into the y-axis guide groove (the first y-axis guide rail) where the left part of the slider 405 originally is, and the redundant part of the right part of the slider 405 can move to the right out of the y-axis guide groove (the second y-axis guide rail), and correspondingly, the right part of the slider 405 can move to the right into the y-axis guide groove (the second y-axis guide rail).

[0043] The redundant parts on the left part of the slider 405 and the right part of the slider 405 can ensure that the slider 405 can maintain sliding cooperation with the first y-axis guide rail 403 and the second y-axis guide rail 404 when the slider 405 moves left and right, so that timely up and down sliding guidance can be provided when the slider 405 moves up and down.

[0044] Correspondingly, the upper part of the slider 405 and the lower part of the slider 405 also have corresponding redundant parts 405a to maintain the sliding fit with the first x-axis guide rail 401 and the second x-axis guide rail 402 when the slider 405 moves up and down.

[0045] As shown in Fig. 2 The first x-axis guide rail 401, the first y-axis guide rail 403, the second x-axis guide rail 402, and the second y-axis guide rail 404 are sequentially connected end to end to form a rectangular frame structure or a similar rectangular frame.

[0046] In some embodiments, the x-axis drive assembly includes a first coil 406 mounted on the slider 405 near the left part of the slider 405, a second coil 408 mounted on the slider 405 near the right part of the slider 405, and a first magnet 407 mounted on the first y-axis guide rail 403 corresponding to the first coil 406, and a second magnet 409 mounted on the second y-axis guide rail 404 corresponding to the second coil 408.

[0047] The y-axis drive assembly includes a third coil 410 mounted on the slider 405 near the upper part of the slider 405, a fourth coil 412 mounted on the slider 405 near the lower part of the slider 405, and a third magnet 411 mounted on the first x-axis guide rail 401 corresponding to the third coil 410, and a fourth magnet 413 mounted on the second x-axis guide rail 402 corresponding to the fourth coil.

[0048] By sequentially energizing the third coil 410, the second coil 408, the fourth coil 412, and the first coil 406, the coils and the corresponding magnets are sequentially magnetically attracted to each other, and the slider 405 is correspondingly formed to move in the order of up, right, down, and left.

[0049] In some embodiments, in a continuous XPR dithering cycle: before the next coil is energized to drive the slider 405 to move, the energizing current of the coil (which is the previous coil relative to the next coil) is reduced to a holding attraction current interval, and the current in the holding attraction current interval is used to enable the magnetic attraction force generated by the coil and the corresponding magnet to hold the slider 405 at the end point corresponding to the movement route driven by the coil.

[0050] The holding attraction current interval can be 10%-20% of the driving current.

[0051] Before the next coil is energized to drive the slider 405 to move, the previous coil (relative to the coil described above) stops energizing.

[0052] As the third coil 410, the second coil 408, the fourth coil 412, the first coil 406 are sequentially energized, the coils are sequentially magnetically attracted to the corresponding magnets, and the slider corresponds to the moving sequence of up, right, down, and left. Before the fourth coil 412 is energized to drive the slider 405 to move downward, the energizing current of the second coil 408 is reduced to the holding adsorption current interval, and the third coil 410 stops energizing; before the first coil 406 is energized to drive the slider 405 to move left, the energizing current of the fourth coil 412 is reduced to the holding adsorption current interval, and the second coil 408 stops energizing; the continuous sequential control is performed according to the continuous XPR dithering cycle.

[0053] When the fourth coil 412 is energized to drive the slider 405 to move downward, the energizing current of the second coil is reduced to the holding adsorption current interval. On the one hand, the magnetic attraction between the second coil 408 and the second magnet 409 can hold the slider 405 at the terminal point after moving right (obtained by energizing the slider with the second coil), that is, the slider 405 can be held on the right side, and then move downward (obtained by energizing the slider with the fourth coil) on the right side. When the slider 405 moves in the corresponding sequence of "up, right, down, and left", the movement process is more stable.

[0054] When applied in scenes such as detecting projection on a car driving or detecting projection in a VR head-mounted display, it is not easy to be affected by external vibration factors (such as road vibration in real-time driving or vibration when the user is walking) to cause vibration deviation, ensuring the stability of the XPR dithering projection; on the other hand, reducing the energizing current of the second coil 408 from a higher driving current to a current in the holding adsorption current interval can effectively reduce the friction between the upper part of the slider 405 and the right end limit part of the first x-axis guide rail 401, and the friction between the lower part of the slider 405 and the right end limit part of the second x-axis guide rail, which can effectively reduce the heat of the guide rail slider platform when continuously performing XPR dithering projection.

[0055] In some embodiments, the display chip 6 is a 0.47DMD display chip; the XPR dithering unit is to move the display chip by half a pixel point each time in the sequence of up, right, down, and left to form an XPR dithering cycle, so that the same pixel point forms four visual persistence pixel points at different positions, and each micromirror on the display chip participates in the imaging of the four visual persistence pixel points at a frequency of 240Hz, and the content displayed by two of the visual persistence pixel points is the corresponding fusion image, and the content displayed by the other two visual persistence pixel points is the corresponding visible light image.

[0056] Preferably, the contents displayed by the visual persistence pixel points in the upper direction and the visual persistence pixel points in the lower direction are images of the same type.

[0057] Preferably, the contents displayed by the visual persistence pixel points in the same direction in different XPR dithering cycles are visible light images or fusion images.

[0058] In some embodiments, the XPR dithering unit 4 includes a guide rail slider platform with only one axial movement direction, which corresponds to the right-up and left-down movement directions. The guide rail thereof meets the movement of the slider from the right-up position to the left-down position and from the left-down position to the right-up position. The driving assembly thereof only needs to be provided with a first coil for driving the slider to move right-up and a second coil for driving the slider to move left-up, and when driving, the first coil and the second coil are sequentially turned on and off to form a continuous XPR dithering cycle.

[0059] In some embodiments, the display chip 6 is a 0.66DMD display chip; the XPR dithering unit is used to quickly move the display chip in the order of right-up and left-down to form an XPR dithering cycle, so that two visual persistence pixel points of the same pixel point are formed at different positions, each micromirror on the display chip participates in the imaging of the two visual persistence pixel points, and the content displayed by one of the visual persistence pixel points is a visible light image, and the content displayed by the other visual persistence pixel point is a fusion image.

[0060] Preferably, the contents displayed by the visual persistence pixel points in the same direction in different XPR dithering cycles are visible light images or fusion images.

[0061] In this embodiment, according to the design of the infrared thermal imaging display system in the above-mentioned embodiment, a 4K imaging method is actually proposed, which comprises

[0062] acquiring an infrared thermal image of a target scene, and acquiring a visible light image of the target scene;

[0063] generating a fusion image of a region image of a thermal radiation target in the infrared thermal image and the visible light image;

[0064] controlling the display chip to project and display the fusion image and the visible light image;

[0065] when projecting and displaying, controlling the XPR dithering unit to drive the display chip to dither;

[0066] In the process of completing each XPR dithering cycle, the display chip displays at least 2 frames of display images, and the multiple frames of images displayed in each XPR dithering cycle include at least 1 frame of fusion image and at least 1 frame of visible light image.

[0067] In some embodiments, the display chip is a 0.47DMD display chip; the XPR dithering unit is to quickly move the display chip by half a pixel point each time in the order of up, right, down and left to form an XPR dithering cycle, so that 4 visual persistence pixels of the same pixel point are formed at different positions, each micro-mirror on the display chip participates in the imaging of the 4 visual persistence pixels at a frequency of 240Hz, and the contents displayed by 2 of the visual persistence pixels are corresponding fusion images, and the contents displayed by the other 2 visual persistence pixels are corresponding visible light images.

[0068] Further, the contents displayed by the visual persistence pixel in the up direction and the visual persistence pixel in the down direction are corresponding images of the same type; the contents displayed by the visual persistence pixel in the left direction and the visual persistence pixel in the right direction are corresponding images of the same type.

[0069] Further, the contents displayed by the visual persistence pixel in the same direction in different XPR dithering cycles are corresponding visible light images or corresponding fusion images.

[0070] In some embodiments, the display chip is a 0.66DMD display chip; the XPR dithering unit is to quickly move the display chip in the order of right up and left down to form an XPR dithering cycle, so that 2 visual persistence pixels of the same pixel point are formed at different positions, each micro-mirror on the display chip participates in the imaging of the 2 visual persistence pixels, and the content displayed by 1 of the visual persistence pixels is a corresponding visible light image, and the content displayed by the other visual persistence pixel is a corresponding fusion image.

[0071] Further, the contents displayed by the visual persistence pixel in the same direction in different XPR dithering cycles are corresponding visible light images or corresponding fusion images.

[0072] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be regarded as limiting the claims to which they relate.

Claims

1. An infrared thermal imaging display system, characterized by, The infrared thermal image acquisition unit, the visible light image acquisition unit, the image fusion module, the XPR dithering unit, the control unit and the display chip are included. The infrared thermal image acquisition unit is configured to acquire an infrared thermal image of a target scene; the visible light image acquisition unit is configured to acquire a visible light image of the target scene; and the image fusion module is configured to extract a region image of a thermal radiation target from the acquired infrared thermal image, and fuse the extracted region image of the thermal radiation target with the visible light image to obtain a fused image. The controller of the control unit is configured to project and display the fused image obtained by the image fusion module and the visible light image acquired by the visible light image acquisition unit through the display chip, and control the XPR dithering unit to drive the display chip to dither when the projection and display is performed. During each XPR dithering cycle, at least two visual persistence pixel points of the same pixel point formed at different positions are generated, and the content displayed by one of the visual persistence pixel points is the corresponding visible light image, and the content displayed by the other visual persistence pixel point is the corresponding fused image.

2. The infrared thermographic display system of claim 1, wherein, The display chip is a 0.47DMD display chip. The XPR dithering unit is configured to quickly move the display chip by half a pixel point in the order of up, right, down and left to form an XPR dithering cycle, so that four visual persistence pixel points of the same pixel point formed at different positions are generated, each micromirror on the display chip participates in the imaging of the four visual persistence pixel points at a frequency of 240Hz, and the content displayed by two of the visual persistence pixel points is the corresponding fused image, and the content displayed by the other two visual persistence pixel points is the corresponding visible light image.

3. The infrared thermal imaging display system according to claim 2, wherein the content displayed by the visual persistence pixel point in the up direction and the visual persistence pixel point in the down direction is corresponding to the same type of image; the content displayed by the visual persistence pixel point in the left direction and the visual persistence pixel point in the right direction is corresponding to the same type of image.

4. The infrared thermographic display system of claim 1, wherein, The display chip is a 0.66DMD display chip. The XPR dithering unit is configured to quickly move the display chip in the order of right up and left down to form an XPR dithering cycle, so that two visual persistence pixel points of the same pixel point formed at different positions are generated, each micromirror on the display chip participates in the imaging of the two visual persistence pixel points, and the content displayed by one of the visual persistence pixel points is the corresponding visible light image, and the content displayed by the other visual persistence pixel point is the corresponding fused image.

5. The infrared thermographic display system according to any of claims 2-4, characterized in that, The content displayed by the visual persistence pixel points in the same direction in different XPR dithering cycles is corresponding to the visible light image or corresponding to the fused image.

6. A 4K imaging method, characterized by, The method comprises acquiring an infrared thermal image of a target scene, and acquiring a visible light image of the target scene; generating a fused image of a region image of a thermal radiation target in the infrared thermal image and the visible light image; controlling the display chip to project and display the fused image and the visible light image; controlling the XPR dithering unit to drive the display chip to dither when the projection and display is performed. At least two visual persistence pixels are formed when the same pixel point is formed at different positions, and one of the visual persistence pixels displays the corresponding visible light image and the other visual persistence pixel displays the corresponding fusion image.

7. The 4K imaging method of claim 6, wherein, The display chip is a 0.47DMD display chip. The XPR dithering unit is configured to quickly move the display chip by half a pixel point in the order of up, right, down and left to form an XPR dithering cycle, so that four visual persistence pixels are formed when the same pixel point is formed at different positions, each micro-mirror on the display chip participates in imaging of the four visual persistence pixels at a frequency of 240Hz, and two of the visual persistence pixels display the corresponding fusion image and the other two visual persistence pixels display the corresponding visible light image.

8. The 4K imaging method of claim 7, wherein, The contents displayed by the visual persistence pixels in the up direction and the visual persistence pixels in the down direction are corresponding to the same type of image. The contents displayed by the visual persistence pixels in the left direction and the visual persistence pixels in the right direction are corresponding to the same type of image.

9. The 4K imaging method of claim 6, wherein, The display chip is a 0.66DMD display chip. The XPR dithering unit is configured to quickly move the display chip in the order of right up and left down to form an XPR dithering cycle, so that two visual persistence pixels are formed when the same pixel point is formed at different positions, each micro-mirror on the display chip participates in imaging of the two visual persistence pixels, and one of the visual persistence pixels displays the corresponding visible light image and the other visual persistence pixel displays the corresponding fusion image.

10. The 4K imaging method according to any of claims 7-9, characterized in that, The contents displayed by the visual persistence pixels in the same direction in different XPR dithering cycles are corresponding to the visible light image or the fusion image.

Images