4K imaging method and infrared thermal imaging system

Abstract

The invention discloses a 4K imaging method and an infrared thermal imaging system, and relates to the technical field of infrared thermal imaging, and the system comprises an infrared thermal image acquisition unit, a visible light image acquisition unit, an image fusion module, an XPR jitter unit, a control unit and a display chip. In an area where a thermal radiation target is located in projection display, non-same-frame display of a thermal infrared image of the thermal radiation target and a visible light image of the thermal radiation target is formed, and a visual persistence effect is formed through the XPR jitter unit. A user can obtain the characteristics of different thermal radiation targets displayed by the thermal infrared image and the visible light image in the display area where the thermal radiation target is located, visible light details of the thermal radiation target can be observed more timely under the condition that the thermal infrared information of the thermal radiation target is obtained, and the user can judge the condition more conveniently; in an area except a thermal radiation target in projection display, multi-pixel display of a visible light image is correspondingly formed, and the display cost is effectively reduced while the resolution is improved.

Description

Technical Field

[0001] The present invention relates to the field of infrared thermal imaging technology, and in particular to a 4K imaging method and an infrared thermal imaging system. Background Art

[0002] An infrared thermal imager is a device that uses infrared thermal imaging technology to detect the infrared radiation of the target object and convert the image of the temperature distribution of the target object into a visible image by means of signal processing, photoelectric conversion, etc. The working principle of the infrared thermal imager is based on the principle that all objects above absolute zero (-273°C) will emit infrared radiation. The thermal imager uses an infrared detector and an optical imaging objective lens to receive the infrared radiation energy distribution diagram of the target to be measured, and reflects it on the photosensitive element of the infrared detector to obtain an infrared thermal image. This thermal image corresponds to the heat distribution field on the surface of the object. By viewing the thermal image, the overall temperature distribution of the target to be measured can be observed, the heating condition of the target can be studied, and 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 is mainly fused by replacing the image of each frame of the thermal radiation target in the visible light with the target image of the thermal radiation target obtained in the infrared thermal image at the same time, obtaining multiple frames of fused images, and then playing them frame by frame to form a fused video. When the user is viewing the fused video, he can only see the outline of the thermal radiation target and the thermal infrared image corresponding to the target outline, and cannot observe the movement details of the thermal radiation target well.

[0004] For some infrared thermal imaging systems that require users to monitor or observe the target area in real time, it is impossible to combine the observable visible light situation and the unobservable thermal radiation situation to make a timely judgment on the situation. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a solution that can solve the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: 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 jitter unit, a control unit and a display chip; the infrared thermal image acquisition unit is used to acquire an infrared thermal image of a target scene; the visible light image acquisition unit is used to acquire a visible light image of the target scene; the image fusion module is used to extract a regional image of a thermal radiation target from the acquired infrared thermal image, and fuse the extracted regional 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 obtained by the visible light image acquisition unit through a display chip, and when controlling the projection display, control the XPR jitter unit to drive the display chip to jitter; in the process of completing each XPR jitter 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 solution of the present invention: the display chip is a 0.47DMD display chip; the XPR jitter unit quickly moves the display chip half a pixel at a time in the order of up, right, down, and left to form an XPR jitter cycle, so that the same pixel forms four visual persistence pixels at different positions, and 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 corresponding fused images, and the contents displayed by the other two visual persistence pixels are corresponding visible light images.

[0008] As a further solution of the present invention: the contents displayed by the persistence of vision pixel points with the orientation of upward and the persistence of vision pixel points with the orientation of downward both correspond to images of the same type; the contents displayed by the persistence of vision pixel points with the orientation of left and the persistence of vision pixel points with the orientation of right both correspond to images of the same type.

[0009] As a further solution of the present invention: the display chip is a 0.66DMD display chip; the XPR dither unit quickly moves the display chip in the order of upper right and lower left to form an XPR dither cycle, so that the same pixel forms two visual persistence pixels at different positions, each micromirror on the display chip participates in the imaging of 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 fused image.

[0010] As a further solution of the present invention: the contents displayed by the persistence of vision pixels at the same position in different XPR dithering cycles all correspond to visible light images or all correspond to fused images.

[0011] The present invention also provides the following technical solution: a 4K imaging method, the method comprising: Acquire an infrared thermal image of the target scene, and acquire a visible light image of the target scene; Generate a fusion image of the area image of the thermal radiation target in the infrared thermal image and the visible light image; Control the display chip to project and display the fused image and the visible light image; When performing projection display, the XPR jitter unit is controlled to drive the display chip to jitter; During 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 by each XPR dithering cycle include at least one frame of fused image and at least one frame of visible light image.

[0012] As a further solution of the present invention: the display chip is a 0.47DMD display chip; the XPR jitter unit quickly moves the display chip half a pixel at a time in the order of up, right, down, and left to form an XPR jitter cycle, so that the same pixel forms four visual persistence pixels at different positions, and 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 corresponding fused images, and the contents displayed by the other two visual persistence pixels are corresponding visible light images.

[0013] As a further solution of the present invention: the contents displayed by the persistence of vision pixel points with the orientation of upward and the persistence of vision pixel points with the orientation of downward both correspond to images of the same type; the contents displayed by the persistence of vision pixel points with the orientation of left and the persistence of vision pixel points with the orientation of right both correspond to images of the same type.

[0014] As a further solution of the present invention: the display chip is a 0.66DMD display chip; the XPR dither unit quickly moves the display chip in the order of upper right and lower left to form an XPR dither cycle, so that the same pixel forms two visual persistence pixels at different positions, each micromirror on the display chip participates in the imaging of 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 fused image.

[0015] As a further solution of the present invention: the contents displayed by the persistence of vision pixels at the same position in different XPR dithering cycles all correspond to visible light images or all correspond to fused images.

[0016] Compared with the prior art, the beneficial effects of the present technical solution are as follows: in the area where the thermal radiation target is located in the projection display, the corresponding thermal infrared image of the thermal radiation target and the visible light image of the thermal radiation target are displayed in non-same frame, and the visual persistence effect formed by the XPR jitter unit enables the user to obtain the characteristics of different thermal radiation targets displayed by the thermal infrared image and the visible light image in the display area where the thermal radiation target is located, and when the thermal infrared information of the thermal radiation target is obtained, the visible light details of the thermal radiation target can be observed more timely, which is more conducive to the user's judgment of the situation, such as whether it is a dangerous situation; in the area outside the thermal radiation target in the projection display, the corresponding multi-pixel display of the visible light image is formed, the resolution is improved while the display cost is effectively reduced.

[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] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a circuit block diagram of the infrared thermal imaging display system of the present invention; Figure 2 is a schematic diagram of the structure of the XPR jitter unit in the present invention; Figure 3 It is a flow chart of the 4K imaging method in the present invention.

[0020] The corresponding reference numerals in the accompanying drawings are described as follows: Infrared thermal image acquisition unit-1, visible light image acquisition unit-2, image fusion module-3, XPR dithering unit-4, control unit-5, display chip-6, first x-axis guide rail-401, second x-axis guide rail-402, first y-axis guide rail-403, second y-axis guide rail-404, slider-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

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-3 , an infrared thermal imaging display system, including an infrared thermal image acquisition unit 1, a visible light image acquisition unit 2, an image fusion module 3, an XPR jitter unit 4, a control unit 5 and a display chip 6.

[0023] The infrared thermal image acquisition unit 1 is used to acquire the infrared thermal image of the target scene; the visible light image acquisition unit 2 is used to acquire the visible light image of the target scene; the image fusion module 3 is used to extract the regional image of the thermal radiation target from the acquired infrared thermal image, and fuse the extracted regional image of the thermal radiation target with the visible light image to obtain a fused image.

[0024] 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 when controlling the projection display, control the XPR jitter unit 4 to drive the display chip 6 to jitter.

[0025] During the process of completing 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.

[0026] In the projection display, the area where the thermal radiation target is located corresponds to the non-synchronous 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 jitter unit 4 enables the user to obtain the characteristics of different thermal radiation targets displayed by the thermal infrared image and the visible light image in the display area where the thermal radiation target is located. When the thermal infrared information of the thermal radiation target is obtained, the visible light details of the thermal radiation target can be observed more timely, which is more conducive to the user's judgment of the situation, such as whether it is a dangerous situation.

[0027] In the projection display, the area outside the thermal radiation target corresponds to a multi-pixel display that forms a visible light image, so that the resolution is also improved.

[0028] In some embodiments, the XPR jitter unit 4 includes 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.

[0029] The XPR shaking unit 4 also has an x-axis driving component for driving the slider 405 of the guide rail slider platform to move in the left-right direction, and a y-axis driving component for driving the slider 405 of the guide rail slider platform to move in the up-down direction. The x-axis driving component and the y-axis driving component can simultaneously drive the slider 405 of the guide rail slider platform to move.

[0030] like Figure 2 As shown, in some embodiments, the guide rail slider platform has a first x-axis guide rail 401 that cooperates with the upper portion of the slider 405, a second x-axis guide rail 402 that cooperates with the lower portion of the slider 405, a first y-axis guide rail 403 that cooperates with the left portion of the slider 405, and a second y-axis guide rail 404 that cooperates with the right portion of the slider 405.

[0031] The first x-axis guide rail 401 and the second x-axis guide rail 402 have x-axis guide grooves penetrating vertically and extending horizontally, and the first y-axis guide rail 403 and the second y-axis guide rail 404 have y-axis guide grooves penetrating horizontally and extending vertically.

[0032] The left and right extension design of the x-axial guide groove is used to provide sliding guidance for the slider 405 when the x-axial drive assembly drives the slider 405. The left and right through design of the y-axial 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 on the corresponding y-axial guide groove to avoid jamming when the slider 405 moves left and right.

[0033] That is, in fact, the left part of the slider 405 and the right part of the slider 405 have redundant parts 405a that are slidably matched with the corresponding y-axis guide grooves. When the slider 405 moves to the right, the redundant part of the left part of the slider 405 can move to the right to the y-axis guide groove (first y-axis guide rail) where the left part of the slider 405 is originally located, and the redundant part of the right part of the slider 405 can move to the right to pass out of the y-axis guide groove (second y-axis guide rail), and correspondingly, the right part of the slider 405 can move to the right to pass into the y-axis guide groove (second y-axis guide rail).

[0034] The redundant parts on the left part of the slider 405 and the right part of the slider 405 can ensure that when the slider 405 moves left and right, the slider 405 can maintain sliding cooperation with the first y-axis guide rail 403 and the second y-axis guide rail 404, so that when the slider 405 moves up and down, up and down sliding guidance can be provided in time.

[0035] Correspondingly, the upper portion of the slider 405 and the lower portion of the slider 405 also have corresponding redundant parts 405a to maintain 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.

[0036] like Figure 2 As shown, 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 frame similar to a rectangle.

[0037] In some embodiments, the x-axis drive assembly includes a first coil 406 installed on the slider 405 near the left portion of the slider 405, a second coil 408 installed on the slider 405 near the right portion of the slider 405, and a first magnet 407 installed on the first y-axis guide rail 403 corresponding to the first coil 406, and a second magnet 409 installed on the second y-axis guide rail 404 corresponding to the second coil 408.

[0038] The y-axis driving assembly includes a third coil 410 installed on the slider 405 near the upper part of the slider 405, a fourth coil 412 installed on the slider 405 near the lower part of the slider 405, and a third magnet 411 installed on the first x-axis guide rail 401 corresponding to the third coil 410, and a fourth magnet 413 installed on the second x-axis guide rail 402 corresponding to the fourth coil.

[0039] The third coil 410, the second coil 408, the fourth coil 412, and the first coil 406 can be energized in sequence, so that the coils and the corresponding magnets are magnetically attracted to each other in sequence, and the slider 405 forms a corresponding movement sequence of up, right, down, and left.

[0040] In some embodiments, in a continuous XPR jitter cycle: before the next coil is energized to drive the slider 405 to move, the energized current of the coil (relative to the next coil, the coil is the previous coil of the next coil) is reduced to a holding adsorption current interval, and the current in the holding adsorption current interval is used to enable: the magnetic attraction force generated by the coil and the corresponding magnet to keep the slider 405 at the end point corresponding to the moving route driven by the coil.

[0041] The adsorption current range can be 10%-20% of the drive current.

[0042] Before the next coil is energized to drive the slider 405 to move, the previous coil (relative to the above coil) stops energizing.

[0043] For example, by controlling the third coil 410, the second coil 408, the fourth coil 412, and the first coil 406 to be energized in sequence, the coils are magnetically attracted to and matched with the corresponding magnets in sequence, so that the slider forms a corresponding movement sequence of up, right, down, and left. Before the fourth coil 412 is energized to drive the slider 405 to move downward, the current of the second coil 408 is reduced to maintain the adsorption current range, and the third coil 410 stops being energized; before the first coil 406 is energized to drive the slider 405 to move to the left, the current of the fourth coil 412 is reduced to maintain the adsorption current range, and the second coil 408 stops being energized; and continuous sequence control is performed according to continuous XPR jitter cycles.

[0044] When the fourth coil 412 is energized to drive the slider 405 to move downward, the current of the second coil is reduced to the range of the current for maintaining the adsorption. On the one hand, the magnetic attraction of the second coil 408 and the second magnet 409 can keep the slider 405 at the end point after moving to the right (obtained by the second coil energizing the slider), that is, the slider 405 can be kept on the right side and then move downward on the right side (obtained by the fourth coil energizing the slider). This makes the slider 405 move more stably when performing the corresponding "up, right, down, left" movements.

[0045] When used in scenarios such as detecting projection on a moving car or detecting projection when using a VR headset, it is not easy to cause vibration deviation due to the influence of external vibration factors (such as road vibration during real-time driving, vibration when the user walks), thereby ensuring the stability of the XPR jitter projection; on the other hand, the current passing through the second coil 408 is reduced from a higher driving current to a current that maintains the adsorption current range. While achieving adsorption and retention, the friction between the upper part of the slider 405 and the right end limit of the first x-axis guide rail 401 and the friction between the lower part of the slider 405 and the right end limit of the second x-axis guide rail can be effectively reduced. When the XPR jitter projection is continuously performed, the heat of the guide rail slider platform can be effectively reduced.

[0046] In some embodiments, the display chip 6 is a 0.47DMD display chip; the XPR jitter unit quickly moves the display chip half a pixel at a time in the order of up, right, down, and left to form an XPR jitter cycle, so that the same pixel forms four visual persistence pixels at different positions, and 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 corresponding fused images, and the contents displayed by the other two visual persistence pixels are corresponding visible light images.

[0047] Preferably, the contents displayed by the persistence of vision pixel points located upward and the persistence of vision pixel points located downward both correspond to images of the same type; the contents displayed by the persistence of vision pixel points located left and the persistence of vision pixel points located right both correspond to images of the same type.

[0048] Preferably, the contents displayed by the persistence of vision pixels at the same position in different XPR dithering cycles all correspond to visible light images or all correspond to fused images.

[0049] In some embodiments, the XPR jitter unit 4 includes a guide rail slider platform with only one axial movement direction, which corresponds to the movement direction of the upper right and lower left. Its guide rail satisfies its slider to move from the upper right position to the lower left position, and from the lower left position to the upper right position. Its driving component only needs to be provided with a first coil for driving the slider to move to the upper right and a second coil for driving the slider to move to the upper left. When driving, the first coil and the second coil are sequentially powered on and off to form a continuous XPR jitter cycle.

[0050] In some embodiments, the display chip 6 is a 0.66DMD display chip; the XPR jitter unit quickly moves the display chip in the order of upper right and lower left to form an XPR jitter cycle, so that the same pixel forms two visual persistence pixels at different positions, and each micromirror on the display chip participates in the imaging of 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 fused image.

[0051] Preferably, the contents displayed by the persistence of vision pixels at the same position in different XPR dithering cycles all correspond to visible light images or all correspond to fused images.

[0052] In this embodiment, according to the design of the infrared thermal imaging display system in the above embodiment, this embodiment actually also proposes a 4K imaging method, the method includes Acquire an infrared thermal image of the target scene, and acquire a visible light image of the target scene; Generate a fusion image of the area image of the thermal radiation target in the infrared thermal image and the visible light image; Control the display chip to project and display the fused image and the visible light image; When performing projection display, the XPR jitter unit is controlled to drive the display chip to jitter; During 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 by each XPR dithering cycle include at least one frame of fused image and at least one frame of visible light image.

[0053] In some embodiments, the display chip is a 0.47DMD display chip; the XPR jitter unit quickly moves the display chip half a pixel at a time in the order of up, right, down, and left to form an XPR jitter cycle, so that the same pixel forms four persistence of vision pixels at different positions, and each micromirror on the display chip participates in the imaging of the four persistence of vision pixels at a frequency of 240Hz, and the contents displayed by two of the persistence of vision pixels are corresponding fused images, and the contents displayed by the other two persistence of vision pixels are corresponding visible light images.

[0054] Furthermore, the contents displayed by the persistence of vision pixel points located upward and the persistence of vision pixel points located downward both correspond to the same type of image; the contents displayed by the persistence of vision pixel points located left and the persistence of vision pixel points located right both correspond to the same type of image.

[0055] Furthermore, the contents displayed by the persistence of vision pixels at the same position in different XPR dithering cycles all correspond to visible light images or all correspond to fused images.

[0056] In some embodiments, the display chip is a 0.66DMD display chip; the XPR dither unit quickly moves the display chip in the order of upper right and lower left to form an XPR dither cycle, so that the same pixel forms two persistence of vision pixels at different positions, and each micromirror on the display chip participates in the imaging of two persistence of vision pixels, and the content displayed by one of the persistence of vision pixels is the corresponding visible light image, and the content displayed by the other persistence of vision pixel is the corresponding fused image.

[0057] Furthermore, the contents displayed by the persistence of vision pixels at the same position in different XPR dithering cycles all correspond to visible light images or all correspond to fused images.

[0058] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An infrared thermal imaging display system, characterized in that: It includes 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 to acquire an infrared thermal image of the target scene; the visible light image acquisition unit is used to acquire a visible light image of the target scene; the image fusion module is used to extract the regional image of the thermal radiation target from the acquired infrared thermal image, and fuse the extracted regional 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 jitter unit to drive the display chip to jitter when controlling the projection display; During the process of completing each XPR dithering cycle, the display chip is made to display 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.

2. The infrared thermal imaging display system according to claim 1, characterized in that: The display chip is a 0.47DMD display chip; The XPR dither unit quickly moves the display chip half a pixel at a time in the order of up, right, down, and left to form an XPR dither cycle, so that the same pixel forms four persistence of vision pixels at different positions. Each micromirror on the display chip participates in the imaging of the four persistence of vision pixels at a frequency of 240Hz, and the contents displayed by two of the persistence of vision pixels are the corresponding fused images, and the contents displayed by the other two persistence of vision pixels are the corresponding visible light images.

3. The infrared thermal imaging display system according to claim 2, characterized in that: The contents displayed by the persistence of vision pixel point with the orientation being upward and the persistence of vision pixel point with the orientation being downward both correspond to the same type of image; The contents displayed by the persistence of vision pixel point with a left orientation and the persistence of vision pixel point with a right orientation both correspond to the same type of image.

4. The infrared thermal imaging display system according to claim 1, characterized in that: The display chip is a 0.66DMD display chip; The XPR dither unit quickly moves the display chip in the order of upper right and lower left to form an XPR dither cycle, so that the same pixel forms two persistence of vision pixels at different positions. Each micromirror on the display chip participates in the imaging of two persistence of vision pixels, and the content displayed by one of the persistence of vision pixels is the corresponding visible light image, and the content displayed by the other persistence of vision pixel is the corresponding fused image.

5. The infrared thermal imaging display system according to any one of claims 2 to 4, characterized in that: The contents displayed by the persistence of vision pixels at the same position in different XPR dithering cycles are all corresponding visible light images or are all corresponding fused images.

6. A 4K imaging method, characterized in that: Methods include Acquire an infrared thermal image of the target scene, and acquire a visible light image of the target scene; Generate a fusion image of the area image of the thermal radiation target in the infrared thermal image and the visible light image; Control the display chip to project and display the fused image and the visible light image; When performing projection display, the XPR jitter unit is controlled to drive the display chip to jitter; During 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 by each XPR dithering cycle include at least one frame of fused image and at least one frame of visible light image.

7. The 4K imaging method according to claim 6, characterized in that: The display chip is a 0.47DMD display chip; The XPR dither unit quickly moves the display chip half a pixel at a time in the order of up, right, down, and left to form an XPR dither cycle, so that the same pixel forms four persistence of vision pixels at different positions. Each micromirror on the display chip participates in the imaging of the four persistence of vision pixels at a frequency of 240Hz, and the contents displayed by two of the persistence of vision pixels are the corresponding fused images, and the contents displayed by the other two persistence of vision pixels are the corresponding visible light images.

8. The 4K imaging method according to claim 7, characterized in that: The contents displayed by the persistence of vision pixel point with the orientation being upward and the persistence of vision pixel point with the orientation being downward both correspond to the same type of image; The contents displayed by the persistence of vision pixel point with a left orientation and the persistence of vision pixel point with a right orientation both correspond to the same type of image.

9. The 4K imaging method according to claim 6, characterized in that: The display chip is a 0.66DMD display chip; The XPR dither unit quickly moves the display chip in the order of upper right and lower left to form an XPR dither cycle, so that the same pixel forms two persistence of vision pixels at different positions. Each micromirror on the display chip participates in the imaging of two persistence of vision pixels, and the content displayed by one of the persistence of vision pixels is the corresponding visible light image, and the content displayed by the other persistence of vision pixel is the corresponding fused image.

10. The 4K imaging method according to any one of claims 7 to 9, characterized in that: The contents displayed by the persistence of vision pixels at the same position in different XPR dithering cycles are all corresponding visible light images or are all corresponding fused images.

Images