A shadowless lamp for a ship

Abstract

The application provides a marine shadowless lamp, and relates to the field of lamps, which comprises a lamp holder, a supporting rod, a cantilever, a lamp disc, the lamp disc, the cantilever, the supporting rod and the lamp holder are sequentially connected, a plurality of light sources are arranged on the lamp disc, a light intensity sensor is arranged at the position of each light source, and the probe direction of the light intensity sensor is parallel to the direction of the light source; the marine shadowless lamp further comprises a controller, each light source and each light intensity sensor are connected with the controller; the illumination area of each light source is circular, the illumination areas of the light sources are distributed in an equiangular circumferential array around a center point, and the illumination areas of the light sources intersect; the probe direction of the light intensity sensor is towards the center position of the illumination area of the light source, the light intensity sensor is used for detecting the light intensity at the center of the illumination area of the light source, and the controller is suitable for controlling the light source to emit light or be extinguished according to the light intensity detected by the light intensity sensor. The marine shadowless lamp can help to solve the problem that the marine shadowless lamp is prone to causing visual fatigue of doctors due to flickering in a target area.

Description

Technical Field

[0001] This application relates to the field of lighting technology, and more particularly to a marine shadowless lamp. Background Technology

[0002] Shadowless lamps are commonly used for lighting during surgery. By placing light sources at different locations on the target area, they ensure that even if one area is blocked, the light sources in other areas can still illuminate the target area, avoiding noticeable shadows caused by obstruction. Marine shadowless lamps are a type of shadowless lamp, typically installed on ships for surgical lighting on board. In existing shadowless lamps, multiple light sources are usually all on. While blocking a light source in one area may not create a significant shadow, it can cause brightness fluctuations in the target area. Frequent blocking can lead to flickering light and shadow, easily causing visual fatigue for the surgeon. Summary of the Invention

[0003] This application provides a marine shadowless lamp to solve the technical problem that shadowless lamps in the prior art easily cause visual fatigue in doctors.

[0004] In an embodiment of this application, a marine shadowless lamp is provided, including a lamp holder, a support rod, a cantilever, and a lamp panel. The lamp panel, the cantilever, the support rod, and the lamp holder are connected in sequence. The lamp panel is provided with multiple light sources, and a light intensity sensor is provided at the location of each light source. The probe of the light intensity sensor is parallel to the orientation of the light source.

[0005] The marine shadowless lamp also includes a controller, and each of the light sources and each of the light intensity sensors are respectively connected to the controller;

[0006] The illumination area of ​​each light source is circular in shape, and the illumination areas of each light source are distributed in a circular array at equal angles around the center point, and the illumination areas of each light source have overlap.

[0007] The probe of the light intensity sensor is oriented toward the center of the illumination area of ​​the light source. The light intensity sensor is used to detect the light intensity at the center of the illumination area of ​​the light source. The controller is adapted to control the light source to emit light or turn off based on the light intensity detected by the light intensity sensor.

[0008] In some embodiments of this application, the light source is a ring lamp tube, and the light intensity sensor is located at the center of the light source.

[0009] In some embodiments of the present application, the lighting area comprises a circular lighting area and an annular lighting area, the annular lighting area is arranged around the circular lighting area, the brightness of the circular lighting area is higher than that of the annular lighting area, the circular lighting areas of the light sources have intersections, and the probe of the light intensity sensor is directed to the center of the circular lighting area.

[0010] In some embodiments of the present application, the lamp panel is provided with a sighting hole, the sighting hole is located at the center of the light source, the sighting hole is directed to the center of the lighting area of the light source, and the light intensity sensor is arranged in the sighting hole.

[0011] In some embodiments of the present application, the lamp panel is provided with an annular groove, the light source is fixed in the annular groove, and one side of the light source is exposed outside the annular groove.

[0012] In some embodiments of the present application, the light source comprises a first annular lamp tube, a second annular lamp tube and a third annular lamp tube, the light intensity sensor comprises a first light intensity sensor, a second light intensity sensor and a third light intensity sensor, the first light intensity sensor is arranged at the center of the first annular lamp tube, the second light intensity sensor is arranged at the center of the second annular lamp tube, and the third light intensity sensor is arranged at the center of the third annular lamp tube.

[0013] The irradiation directions of the first annular lamp tube, the second annular lamp tube and the third annular lamp tube are parallel, and the first annular lamp tube, the second annular lamp tube and the third annular lamp tube are arranged in an equiangular circumferential array around the center point.

[0014] The lighting area of the first annular lamp tube is a, the lighting area of the second annular lamp tube is b, the lighting area of the third annular lamp tube is c, the intersection area of the lighting area of the first annular lamp tube and the lighting area of the second annular lamp tube is ab, the intersection area of the lighting area of the second annular lamp tube and the lighting area of the third annular lamp tube is bc, the intersection area of the lighting area of the first annular lamp tube and the lighting area of the third annular lamp tube is ac, the intersection area of the lighting area of the first annular lamp tube, the lighting area of the second annular lamp tube and the lighting area of the third annular lamp tube is abc, the shapes of ab, bc and ac are the same, and ab, bc and ac are arranged in an equiangular circumferential array around the center of abc.

[0015] The detection point of the first light intensity sensor is a first detection point, the detection point of the second light intensity sensor is a second detection point, and the detection point of the third light intensity sensor is a third detection point.

[0016] The first detection point is located at the center of a, the second detection point is located at the center of b, and the third detection point is located at the center of c;

[0017] The first detection point is located outside of b and c, the second detection point is located outside of a and c, and the third detection point is located outside of a and b.

[0018] In some embodiments of the present application, the light intensity when the first ring-shaped lamp emits light and a is not blocked, the light intensity when the second ring-shaped lamp emits light and b is not blocked, and the light intensity when the third ring-shaped lamp emits light and c is not blocked are all k.

[0019] In some embodiments of the present application, the sum of the light intensity detected by the first light intensity sensor, the light intensity detected by the second light intensity sensor, and the light intensity detected by the third light intensity sensor is k', if k'>k, the controller controls the first ring-shaped lamp, the second ring-shaped lamp, and the third ring-shaped lamp to traverse all combinations of emission or extinction until k'=k, otherwise the controller controls the first ring-shaped lamp, the second ring-shaped lamp, and the third ring-shaped lamp to all emit light.

[0020] In some embodiments of the present application, the sum of the light intensity detected by the first light intensity sensor, the light intensity detected by the second light intensity sensor, and the light intensity detected by the third light intensity sensor is k', if k'<k, the controller controls the first ring-shaped lamp, the second ring-shaped lamp, and the third ring-shaped lamp to all emit light.

[0021] In some embodiments of the present application, the light intensity sensor further comprises a fourth light intensity sensor, the fourth light intensity sensor is connected with the controller, the fourth light intensity sensor is arranged at the center point, the detection point of the fourth light intensity sensor is a fourth detection point, the fourth detection point is located at the center of abc, the fourth light intensity sensor is used to detect the light intensity at the center of abc, and the controller is adapted to control each light source to emit light or be extinguished according to the light intensity detected by the fourth light intensity sensor;

[0022] The fourth light intensity sensor is k', if k'<k, the controller controls the first ring-shaped lamp, the second ring-shaped lamp, and the third ring-shaped lamp to all emit light;

[0023] If k' > k, the controller controls the first ring-shaped lamp, the second ring-shaped lamp, the third ring-shaped lamp to traverse all combinations of lighting or extinguishing until k' = k, otherwise the controller controls the first ring-shaped lamp, the second ring-shaped lamp, the third ring-shaped lamp to all light up.

[0024] The present application has the following beneficial effects:

[0025] In the working process, when one of the light sources is blocked, the corresponding lighting area is blocked, and the sum of the light intensity detection values of the light sources that emit light decreases. When the sum of the light intensity detected by the light intensity sensor is lower than the preset value, the controller controls part of the extinguished light sources to emit light, so that the sum of the light intensity detected by the light intensity sensor reaches the preset value, thereby avoiding the decrease of the brightness of the target area caused by the blocking of a certain light source. When the blocking of the lighting area is removed, the sum of the light intensity detection values of the light sources that emit light increases. When the sum of the light intensity detected by the light intensity sensor is higher than the preset value, the controller controls part of the light-emitting light sources to extinguish, so that the sum of the light intensity detected by the light intensity sensor reaches the preset value, thereby avoiding the increase of the brightness of the target area caused by the removal of the blocking of a certain light source, thereby helping to solve the problem that the marine shadowless lamp is prone to cause visual fatigue of doctors due to flickering in the target area. BRIEF DESCRIPTION OF DRAWINGS

[0026] 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 prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0027] Figure 1 is a structural schematic diagram of a marine shadowless lamp in the embodiment of the present application;

[0028] Figure 2 is a sectional view along the line A-A in Figure 1

[0029] Figure 3 is a structural schematic diagram of a and b and ab in the embodiment of the present application;

[0030] Figure 4 is a structural schematic diagram of a, b and c in the embodiment of the present application;

[0031] Figure 5 is a structural schematic diagram when only the light source corresponding to a emits light in the embodiment of the present application;

[0032] Figure 6 is a structural schematic diagram when only the light source corresponding to b emits light in the embodiment of the present application;​

[0033] Figure 7 is a structural schematic diagram of the application embodiment when only the light source corresponding to c emits light;

[0034] Figure 8 is a structural schematic diagram of the connection of the light intensity sensor, the lamp tube and the controller in the application embodiment.

[0035] Reference signs:

[0036] 100, lamp holder; 200, support rod; 300, cantilever; 400, lamp disc; 410, sighting hole; 420, annular groove; 510, first annular lamp tube; 520, second annular lamp tube; 530, third annular lamp tube; 610, first light intensity sensor; 620, second light intensity sensor; 630, third light intensity sensor; 640, fourth light intensity sensor; 710, annular illumination area; 720, circular illumination area; 800, controller. DETAILED DESCRIPTION

[0037] The embodiments of the application will be further described in detail below with reference to the accompanying drawings and embodiments, and the terms used in the embodiments of the application are only used to explain the specific embodiments of the application, and are not intended to limit the application.

[0038] As shown in Figures 1 to 8 , in the embodiments of the application, a ship shadowless lamp is provided, which comprises a lamp holder 100, a support rod 200, a cantilever 300, and a lamp disc 400. The lamp disc 400, the cantilever 300, the support rod 200, and the lamp holder 100 are connected in sequence. The lamp disc 400 is provided with a plurality of light sources. A light intensity sensor is arranged at the position of each light source. The probe of the light intensity sensor is parallel to the direction of the light source.

[0039] The ship shadowless lamp further comprises a controller 800. Each light source and each light intensity sensor is connected to the controller 800.

[0040] The illumination area of each light source is circular. The illumination areas of the light sources are distributed in an equiangular circular array around a center point. The illumination areas of the light sources intersect.

[0041] The probe of the light intensity sensor is directed to the center position of the illumination area of the light source. The light intensity sensor is used to detect the light intensity at the center of the illumination area of the light source. The controller 800 is adapted to control the light source to emit light or be extinguished according to the light intensity detected by the light intensity sensor.

[0042] By the above-mentioned embodiments of the present embodiment, when starting work, the controller 800 controls a part of the light sources to emit light and another part of the light sources to be extinguished. When one of the light sources is blocked, the corresponding illumination area is blocked, and the sum of the light intensity detection values corresponding to the light sources emitting light decreases. When the sum of the light intensity detected by the light intensity sensor is lower than the preset value, the controller 800 controls the part of the light sources to be extinguished to emit light, so that the sum of the light intensity detected by the light intensity sensor reaches the preset value, avoiding the decrease of the brightness of the target area caused by the blocking of a certain light source. When the blocking of the illumination area is removed, the sum of the light intensity detection values corresponding to the light sources emitting light increases. When the sum of the light intensity detected by the light intensity sensor is higher than the preset value, the controller 800 controls the part of the light sources emitting light to be extinguished, so that the sum of the light intensity detected by the light intensity sensor reaches the preset value, avoiding the increase of the brightness of the target area caused by the removal of the blocking of a certain light source, thereby helping to solve the problem that the shipboard shadowless lamp in the prior art is prone to cause the doctor's visual fatigue due to flickering in the target area. It should be understood that the object blocking the illumination target area during the operation is usually the doctor's hand or head. In order to avoid the light reflected by the hand or head being detected by the light intensity sensor, the doctor wears gloves and a head cover of a specific color, such as blue gloves and a blue head cover, and then covers a piece of filter in front of the probe of the light intensity sensor to filter out the blue light.

[0043] In some embodiments of the present embodiment, the light source is a ring-shaped lamp tube, and the light intensity sensor is located at the center of the light source.

[0044] In some embodiments of the present embodiment, the illumination area includes a circular illumination area and a ring-shaped illumination area, the ring-shaped illumination area is arranged around the circular illumination area, the brightness of the circular illumination area is higher than that of the ring-shaped illumination area, the circular illumination areas of the light sources have intersections, and the probe of the light intensity sensor is directed to the center position of the circular illumination area.

[0045] In some embodiments of the present embodiment, the lamp panel 400 is provided with a sighting hole 410 located at the center of the light source, the sighting hole 410 is directed to the center position of the illumination area of the light source, and the light intensity sensor is arranged in the sighting hole 410.

[0046] In some embodiments of the present embodiment, the lamp panel 400 is provided with a ring-shaped groove 420, the light source is fixed in the ring-shaped groove 420, and one side of the light source is exposed outside the ring-shaped groove 420.

[0047] In some embodiments of the present embodiment, the light source comprises a first ring-shaped lamp 510, a second ring-shaped lamp 520, and a third ring-shaped lamp 530, and the light intensity sensor comprises a first light intensity sensor 610, a second light intensity sensor 620, and a third light intensity sensor 630. The first light intensity sensor 610 is arranged at the center of the first ring-shaped lamp 510, the second light intensity sensor 620 is arranged at the center of the second ring-shaped lamp 520, and the third light intensity sensor 630 is arranged at the center of the third ring-shaped lamp 530.

[0048] The irradiation direction of the first ring-shaped lamp 510, the irradiation direction of the second ring-shaped lamp 520, and the irradiation direction of the third ring-shaped lamp 530 are parallel, and the first ring-shaped lamp 510, the second ring-shaped lamp 520, and the third ring-shaped lamp 530 are arranged in an equiangular circumferential array around the center point.

[0049] The illumination area of the first ring-shaped lamp 510 is a, the illumination area of the second ring-shaped lamp 520 is b, the illumination area of the third ring-shaped lamp 530 is c, the intersection area of the illumination area of the first ring-shaped lamp 510 and the illumination area of the second ring-shaped lamp 520 is ab, the intersection area of the illumination area of the second ring-shaped lamp 520 and the illumination area of the third ring-shaped lamp 530 is bc, the intersection area of the illumination area of the first ring-shaped lamp 510 and the illumination area of the third ring-shaped lamp 530 is ac, the intersection area of the illumination area of the first ring-shaped lamp 510, the illumination area of the second ring-shaped lamp 520, and the illumination area of the third ring-shaped lamp 530 is abc, the shape of ab, the shape of bc, and the shape of ac are the same, and ab, bc, and ac are arranged in an equiangular circumferential array around the center of abc.

[0050] The detection point of the first light intensity sensor 610 is a first detection point, the detection point of the second light intensity sensor 620 is a second detection point, and the detection point of the third light intensity sensor 630 is a third detection point.

[0051] The first detection point is located at the center of a, the second detection point is located at the center of b, and the third detection point is located at the center of c.

[0052] The first detection point is located outside of b and c, the second detection point is located outside of a and c, and the third detection point is located outside of a and b.

[0053] In some embodiments of the present embodiment, the light intensity when the first ring-shaped lamp 510 emits light and a is not blocked, the light intensity when the second ring-shaped lamp 520 emits light and b is not blocked, and the light intensity when the third ring-shaped lamp 530 emits light and c is not blocked are all k.

[0054] In some embodiments of this example, the sum of the light intensity detected by the first light intensity sensor 610, the second light intensity sensor 620, and the third light intensity sensor 630 is k'. If k' > k, the controller 800 controls the first ring lamp 510, the second ring lamp 520, and the third ring lamp 530 to traverse all combinations of luminous or extinguished light until k' = k. Otherwise, the controller 800 controls all three ring lamps to emit light.

[0055] Through the above implementation of this embodiment, all combinations of lighting or extinguishing of the first annular lamp 510, the second annular lamp 520, and the third annular lamp 530 include: the first annular lamp 510, the second annular lamp 520, and the third annular lamp 530.

[0056] 530 is illuminated; the first ring lamp 510, the second ring lamp 520, and the third ring lamp 530 are off; the first ring lamp 510 is illuminated, and the second ring lamp 520 and the third ring lamp 530 are off; the second ring lamp 520 is illuminated, and the first ring lamp 510 and the third ring lamp 530 are off; the third ring lamp 530 is illuminated, and the first ring lamp 510 and the second ring lamp 520 are off; the first ring lamp 510 is off, and the second ring lamp 520 and the third ring lamp 530 are illuminated; the second ring lamp 520 is off, and the first ring lamp 510 and the third ring lamp 530 are illuminated; the third ring lamp 530 is off, and the first ring lamp 510 and the second ring lamp 520 are illuminated. The switching time of each combination is short (each switching process lasts 10 milliseconds, and iterating through all illuminated or off combinations takes 80 milliseconds), and the switching process is not visually observable, thus avoiding a flickering effect.

[0057] In some embodiments of this example, the sum of the light intensity detected by the first light intensity sensor 610, the light intensity detected by the second light intensity sensor 620, and the light intensity detected by the third light intensity sensor 630 is k'. If k' < k, then the controller 800 controls all three ring lamps 510, 520, and 530 to emit light.

[0058] In some embodiments of this example, the light intensity sensor further includes a fourth light intensity sensor 640, which is connected to the controller 800. The fourth light intensity sensor 640 is located at the center point, and its detection point is the fourth detection point, which is located at the center of abc. The fourth light intensity sensor 640 is used to detect the light intensity at the center of abc, and the controller 800 is adapted to control each light source to emit light or turn off based on the light intensity detected by the fourth light intensity sensor 640.

[0059] The fourth light intensity sensor 640 is k', if k' < k, the controller 800 controls the first ring-shaped lamp tube 510, the second ring-shaped lamp tube 520 and the third ring-shaped lamp tube 530 to all emit light;

[0060] If k' > k, the controller 800 controls the first ring-shaped lamp tube 510, the second ring-shaped lamp tube 520 and the third ring-shaped lamp tube 530 to traverse all combinations of emitting light or being off until k' = k, otherwise the controller 800 controls the first ring-shaped lamp tube 510, the second ring-shaped lamp tube 520 and the third ring-shaped lamp tube 530 to all emit light.

[0061] Through the above embodiment of the present embodiment, the target area is arranged inside the abc, and the fourth light intensity sensor 640 detects the light intensity of the target area. Even if one or more of the first light intensity sensor 610, the second light intensity sensor and the third light intensity sensor are blocked, it will not affect the judgment of the light intensity of the target area, and the judgment result is more reliable, and the control result is more accurate.

[0062] In Figures 5 to 7 , the dashed line represents the illumination area corresponding to the blocked light source.

[0063] In the present embodiment, the cantilever 300 is made of plastic material and can be arbitrarily bent to facilitate adjustment of the spatial orientation of the lamp disc 400, so that the target area (surgical site) is in the abc, and the spatial orientation of the lamp disc 400 remains unchanged after adjustment. It can also be realized by three joints to realize three degrees of freedom of rotation (as shown in Figure 1 , the three rectangular blocks with bidirectional arrows represent rotatable joints, and the rotation direction is indicated by the direction of the bidirectional arrow), to adjust the spatial orientation of the lamp disc 400.

[0064] The above embodiments are only an explanation of the present application, which is not a limitation of the present application. Those skilled in the art can make non-creative modifications to the embodiments of the present application according to the needs after reading the present specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A marine shadowless lamp, comprising a lamp holder, a support rod, a cantilever, a lamp disc, the lamp disc, the cantilever, the support rod, the lamp holder are connected in sequence, a plurality of light sources are arranged on the lamp disc, characterized in that, Each of the light sources is provided with a light intensity sensor, a probe of the light intensity sensor is parallel to a direction of the light source; The shadowless lamp for ship further comprises a controller, each of the light sources and each of the light intensity sensors is connected with the controller; A shape of the illumination area of each of the light sources is circular, the illumination areas of each of the light sources are distributed in an equiangular circumferential array around a center point, and the illumination areas of each of the light sources have intersections; A probe of the light intensity sensor is directed to a center of the illumination area of the light source, the light intensity sensor is used to detect a light intensity at the center of the illumination area of the light source, and the controller is adapted to control the light source to emit light or be extinguished according to the light intensity detected by the light intensity sensor; The light source is a ring-shaped lamp tube, and the light intensity sensor is located at the center of the light source; The light source comprises a first ring-shaped lamp tube, a second ring-shaped lamp tube and a third ring-shaped lamp tube, and the light intensity sensor comprises a first light intensity sensor, a second light intensity sensor and a third light intensity sensor, the first light intensity sensor is arranged at the center of the first ring-shaped lamp tube, the second light intensity sensor is arranged at the center of the second ring-shaped lamp tube, and the third light intensity sensor is arranged at the center of the third ring-shaped lamp tube; The illumination directions of the first ring-shaped lamp tube, the second ring-shaped lamp tube and the third ring-shaped lamp tube are parallel, and the first ring-shaped lamp tube, the second ring-shaped lamp tube and the third ring-shaped lamp tube are distributed in an equiangular circumferential array around the center point; An illumination area of the first ring-shaped lamp tube is a, an illumination area of the second ring-shaped lamp tube is b, an illumination area of the third ring-shaped lamp tube is c, an intersection area of the illumination area of the first ring-shaped lamp tube and the illumination area of the second ring-shaped lamp tube is ab, an intersection area of the illumination area of the second ring-shaped lamp tube and the illumination area of the third ring-shaped lamp tube is bc, an intersection area of the illumination area of the first ring-shaped lamp tube and the illumination area of the third ring-shaped lamp tube is ac, an intersection area of the illumination area of the first ring-shaped lamp tube, the illumination area of the second ring-shaped lamp tube and the illumination area of the third ring-shaped lamp tube is abc, shapes of ab, bc and ac are the same, and ab, bc and ac are distributed in an equiangular circumferential array around the center of abc; A detection point of the first light intensity sensor is a first detection point, a detection point of the second light intensity sensor is a second detection point, and a detection point of the third light intensity sensor is a third detection point; The first detection point is located at the center of a, the second detection point is located at the center of b, and the third detection point is located at the center of c; The first detection point is located outside of b and c, the second detection point is located outside of a and c, and the third detection point is located outside of a and b; When the first ring-shaped lamp tube emits light and a is not blocked, when the second ring-shaped lamp tube emits light and b is not blocked, and when the third ring-shaped lamp tube emits light and c is not blocked, the light intensity is k. The sum of the light intensity detected by the first light intensity sensor, the light intensity detected by the second light intensity sensor and the light intensity detected by the third light intensity sensor is k', if k'>k, the controller controls the first ring-shaped lamp, the second ring-shaped lamp and the third ring-shaped lamp to traverse all combinations of lighting or extinguishing until k'=k, otherwise the controller controls the first ring-shaped lamp, the second ring-shaped lamp and the third ring-shaped lamp to all light up; The sum of the light intensity detected by the first light intensity sensor, the light intensity detected by the second light intensity sensor and the light intensity detected by the third light intensity sensor is k', if k'>k, the controller controls the first ring-shaped lamp, the second ring-shaped lamp and the third ring-shaped lamp to traverse all combinations of lighting or extinguishing until k'=k, otherwise the controller controls the first ring-shaped lamp, the second ring-shaped lamp and the third ring-shaped lamp to all light up; The light intensity sensor further comprises a fourth light intensity sensor, the fourth light intensity sensor is connected with the controller, the fourth light intensity sensor is arranged at the center point, the detection point of the fourth light intensity sensor is a fourth detection point, the fourth detection point is located at the center of abc, the fourth light intensity sensor is used for detecting the light intensity at the center of abc, and the controller is adapted to control each light source to light up or extinguish according to the light intensity detected by the fourth light intensity sensor; The fourth light intensity sensor is k', if k'>k, the controller controls the first ring-shaped lamp, the second ring-shaped lamp and the third ring-shaped lamp to traverse all combinations of lighting or extinguishing until k'=k, otherwise the controller controls the first ring-shaped lamp, the second ring-shaped lamp and the third ring-shaped lamp to all light up; If k'>k, the controller controls the first ring-shaped lamp, the second ring-shaped lamp and the third ring-shaped lamp to traverse all combinations of lighting or extinguishing until k'=k, otherwise the controller controls the first ring-shaped lamp, the second ring-shaped lamp and the third ring-shaped lamp to all light up.

2. A shadowless lamp for a boat according to claim 1, characterized in that The lighting area comprises a circular lighting area and a ring-shaped lighting area, the ring-shaped lighting area is arranged around the circular lighting area, the brightness of the circular lighting area is higher than that of the ring-shaped lighting area, the circular lighting areas of each light source have intersections, and the probe of the light intensity sensor is directed to the center position of the circular lighting area.

3. A shadowless lamp for marine use according to claim 1, characterized in that The lamp panel is provided with a sighting hole, the sighting hole is located at the center of the light source, the sighting hole is directed to the center position of the lighting area of the light source, and the light intensity sensor is arranged in the sighting hole.

4. A shadowless lamp for marine use according to claim 1, characterized in that The lamp panel is provided with a ring-shaped groove, the light source is fixed in the ring-shaped groove, and one side of the light source is exposed outside the ring-shaped groove.

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