Light chasing and filling device and camera

Abstract

This application relates to a light-tracking and supplementary lighting device and a camera. The light-tracking and supplementary lighting device includes a light panel and a Fresnel lens group. The light panel includes multiple arrayed light sources, each independently controlled and configured to emit directional beams. The light panel is configured to illuminate multiple light sources at different positions to form a directional fan-shaped beam. The Fresnel lens group is located on the light-emitting side of the light panel, and different light sources are configured to emit beams of different axes or off-axis beams towards the emitting Fresnel lens group. In the above solution, the arrayed light sources divide the space into discrete and controllable regions. Each light source covers a fixed angle range, replacing the mechanical rotating shaft and achieving electronic tracking. Combined with the Fresnel lens group, the beam emitted by the light source is compressed twice, further narrowing the beam angle. This avoids the use of multiple lens groups, reduces the size, and achieves dynamic beam tracking with a static hardware structure, achieving the effects of miniaturization, low power consumption, and high-precision light-tracking and supplementary lighting.

Description

Technical Field

[0001] This application relates to the field of optical technology for security monitoring, and in particular to tracking and supplementary lighting devices and cameras. Background Technology

[0002] In the field of security surveillance optics, with the continuous improvement of public safety demands and the rapid development of intelligent monitoring systems, higher requirements are being placed on the multifunctionality, integration, and image capture effects of monitoring equipment. Monitoring systems with precise target tracking, effective warnings, and clear image capture capabilities can significantly improve response efficiency to emergencies and crime prevention capabilities, thus possessing crucial application value in scenarios such as urban traffic, community security, and protection of important locations.

[0003] Current lighting and target tracking warning technologies in security monitoring are primarily developed based on traditional lighting systems and basic tracking principles. Among these, follow spotlights (systems), as a crucial means of target tracking illumination, rely on a rotating shaft to drive a spotlight to track the target. This technology originated from early lighting and tracking solutions for large venues and has gradually been applied to the security field. Meanwhile, the light warning technology of surveillance cameras has evolved from basic optical warning principles, using methods such as global flashing or laser point warnings to alert targets. Some solutions also employ collimated lasers and wide-angle flashing white light, infrared, or blue light to enhance the warning coverage.

[0004] However, existing technologies have many shortcomings. On the one hand, follow spotlights (systems) employ a multi-convex lens spotlight system combined with a rotating shaft for beam tracking, resulting in a large lamp size and numerous supporting structures, making them difficult to integrate into small cameras and severely limiting their application in miniaturized surveillance equipment. On the other hand, the light warning methods of existing surveillance cameras, whether global flashing, laser dot warning, collimated laser, or large-angle flashing light warning, all have weak warning effects, and the warning light has no significant effect on capturing targets at long distances. More importantly, existing solutions lack area illumination enhancement capabilities, making it impossible to achieve clear capture of target faces and failing to meet the core requirement of accurate target detail capture in security monitoring. Utility Model Content

[0005] Therefore, it is necessary to provide a light-tracking supplementary lighting device and camera to address the problems of large lighting volume and ineffective supplementary lighting for capturing targets in existing security cameras.

[0006] A light-tracking and supplementary lighting device includes a light panel and a Fresnel lens group. The light panel includes multiple arrayed light sources, each of which is independently controlled and configured to emit directional light beams. The light panel is configured to illuminate multiple light sources at different positions to form directional fan-shaped light beams. The Fresnel lens group is located on the light-emitting side of the light panel, and different light sources are configured to emit different axial light beams or off-axis light beams toward the Fresnel lens group.

[0007] In one embodiment, the light source is configured to emit a beam with a beam angle ≤ 20° for 50% of the time.

[0008] In one embodiment, the Fresnel lens group has a focal length of 12mm to 30mm and is configured to compress the beam of each of the light sources to a 50% beam angle of 3° to 10°.

[0009] In one embodiment, the light source includes:

[0010] Light-emitting components, used to emit light;

[0011] An encapsulation layer covers the light-emitting element, and the end face of the encapsulation layer facing away from the light-emitting element has a near-ellipsoidal structure. The light-emitting element is located at the focal point of the near-ellipsoidal line of the encapsulation layer, and the refractive index of the encapsulation layer is n, where 1.2≤n≤1.4.

[0012] In one embodiment, the light source further includes a light-blocking layer, which is disposed on the outer edge region of the encapsulation layer at an angle of not less than 120° to the normal.

[0013] In one embodiment, the surface of the light-emitting element is coated with a fluorescent film.

[0014] In one embodiment, the light source includes a light-emitting element and a superlens, the light-emitting element being used to emit light; the superlens is spaced apart from the light-emitting element by a distance of 0.1 mm to 0.3 mm, and the superlens is used to collimate the light emitted by the light-emitting element through refraction and diffraction.

[0015] In one embodiment, the surface of the superlens is coated with a fluorescent film.

[0016] A camera including a light-tracking and supplemental lighting device as described in any of the above embodiments.

[0017] In one embodiment, the camera further includes an imaging module for taking pictures and a global illumination module. The global illumination module has a set tracking area and is configured to trigger a signal when a target appears in the tracking area. The tracking illumination device is configured to be triggered when the global illumination module triggers the signal, and to illuminate the light source in the corresponding area either constantly or strobe.

[0018] The light-tracking and supplementary lighting device provided in the above scheme divides the space into discrete and controllable areas by setting up an array of light sources, each of which is buoyant-controlled. Each light source covers a fixed angle range, replacing the mechanical rotating shaft and realizing electronic tracking. Combined with Fresnel lens group, the light beam emitted by the light source is compressed a second time, further narrowing the beam angle. This avoids the use of multiple lens groups, reduces the size, and realizes dynamic beam tracking with a static hardware structure. It fundamentally replaces the traditional mechanical rotating shaft system and achieves the effects of miniaturization, low power consumption, and high-precision light-tracking and supplementary lighting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the camera structure in one embodiment of this application.

[0020] Figure 2 for Figure 1 A schematic diagram of the tracking area of ​​the tracking light supplement device.

[0021] Figure 3 for Figure 1 A schematic diagram of the control logic for the camera.

[0022] Figure 4 for Figure 1 A schematic diagram of the central tracking and supplementary lighting device.

[0023] Figure 5 for Figure 4 Side view of the central follow-up lighting device.

[0024] Figure 6 for Figure 4 A schematic diagram of the structure of the Fresnel lens group.

[0025] Figure 7 This is a schematic diagram of the Fresnel lens system.

[0026] Figure 8 for Figure 4 A schematic diagram of the structure of the light source in one embodiment.

[0027] Figure 9 for Figure 4 A schematic diagram of the structure of the light source in another embodiment.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10. Camera; 100. Tracking and supplemental lighting device; 110. Light board; 111. Light source; 1111. Light-emitting component; 1112. Encapsulation layer; 1113. Fluorescent film; 1114. Superlens; 1115. Base; 120. Fresnel lens group; 200. Imaging module; 300. Global supplemental lighting module. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] See Figure 1 , Figure 1 This illustration shows a schematic diagram of the structure of a camera 10 according to one embodiment of this application. The camera 10 provided in this embodiment can be applied to the field of security monitoring, but is not intended to limit it. Figure 1 As shown, the camera 10 includes a light-tracking and supplementary lighting device 100 as described in any of the following embodiments, for supplementing illumination and increasing brightness.

[0037] like Figure 1 As shown, in one embodiment, the camera 10 further includes an imaging module 200 and a global illumination module 300 for capturing images. The imaging module 200 is used for capturing images and can capture and store images within a set area. Typically, the global illumination module 300 provides illumination, but its beam coverage is limited, and its intensity is less than that of the beam from the tracking illumination device 100. The global illumination module 300 has a set tracking area and is configured to trigger a signal when a target appears within that area, for example, when a movable target appears within the tracking area. The tracking illumination device 100 is configured to be triggered when the global illumination module 300 triggers its signal, and to illuminate the corresponding area's light source 111 either constantly or by flashing, supplementing the illumination of the imaging module 200 and providing an alert. The camera 10 provided in the above solution not only achieves an alert effect but also achieves clear target capture. It uses global flashing and point alerts, making the alert area more targeted and the capture clearer.

[0038] Combination Figure 2 As shown,Figure 2 This illustration shows a schematic diagram of the light-tracking area of ​​the light-tracking device 100 in the camera 10 according to an embodiment of this application. Figure 2 The black pixel area in the middle represents the light-tracking block, and the other areas are the imaging field of view. The light-tracking blocks are distributed in an array. When the light-tracking supplementary lighting device 100 is turned on, the light source 111 corresponding to the light-tracking block is constantly lit or flashes, thereby supplementing the light intensity for the shooting of the corresponding imaging field of view, thereby enhancing the capture effect.

[0039] Combination Figure 3 As shown, Figure 3 The diagram shows the control logic of camera 10 in one embodiment of this application. In some embodiments, camera 10 needs to first set the light-tracking area and light-tracking mode in order to reduce false alarms in interference areas. If a target appears in the light-tracking area, the algorithm determines the target in the pixel area. If it is outside the light-tracking area, no processing is performed. If it is in the light-tracking area, the light-tracking mode is activated, and the light source 111 corresponding to the light-tracking area of ​​the pixel is constantly lit or flashes to provide high-brightness supplementary lighting, alert the target and capture a clear image.

[0040] Combination Figure 4 As shown, Figure 4 A schematic diagram of a light-tracking and supplementary lighting device 100 according to an embodiment of this application is shown. This embodiment provides a light-tracking and supplementary lighting device 100, which can be applied to the aforementioned camera 10, but is not intended to limit its use. Figure 4 As shown, the tracking and supplementary lighting device 100 includes a light panel 110 and a Fresnel lens group 120. The light panel 110 includes multiple arrayed light sources 111. Exemplarily, the positions of the light sources 111 are arranged according to the imaging principle. To achieve different beam orientations, the multiple light sources 111 on the light panel 110 are arranged in a way that allows for positioning. The design of the positions is based on the imaging principle. After determining the focal point and the Fresnel collimation structure, the target orientation and vertical axis movement position are calculated, and the light sources 111 are arranged accordingly. The target orientation is typically determined based on the imaging system and scene monitoring decisions. Each light source 111 is independently controlled, and each light source 111 is configured to emit a directional beam. The light panel 110 is configured to illuminate multiple light sources 111 at different positions to form a directional fan-shaped beam. The arrayed light sources 111 divide the space into discrete, controllable areas, with each light source 111 covering a fixed angle range, replacing mechanical shafts and achieving electronic tracking.

[0041] Combination Figure 5 and Figure 6As shown, the Fresnel lens group 120 is located on the light-emitting side of the lamp panel 110. Different light sources 111 are configured to emit beams of different axes or off-axis beams toward the Fresnel lens group 120. The Fresnel lens group 120 is composed of a Fresnel lens array, which can perform secondary compression on the beam emitted by the light source 111, further narrowing the beam angle, avoiding the use of multiple lens groups, reducing the size, and utilizing the miniaturization and high polarization characteristics of Fresnel lenses. By using a small beam angle light source 111 in combination with a Fresnel condenser lens to focus the beam, a directional collimation effect is achieved. Compared with the method of using multiple convex lens groups and mechanical rotation, it has the characteristics of system simplicity and miniaturization.

[0042] Combination Figure 7 As shown, Figure 7 The diagram shows the Fresnel lens group 120 and its principle. For example, when the light source 111 is coaxial with the optical axis of the Fresnel lens... Figure 7 At point B, light rays pass perpendicularly through the center of the lens, forming an axially collimated beam, as shown by Bb, parallel to the optical axis. When the light source 111 deviates from the optical axis (such as at points A and C), the light rays enter the Fresnel lens at an angle. The Fresnel lens can deflect off-axis rays, forming a collimated beam, as shown by Aa, at a specific angle to the optical axis. It can be understood that when light rays are emitted from point C, a collimated beam, as exemplified by Cc (not shown), will also be formed.

[0043] The light-tracking and supplementary lighting device 100 provided in the above scheme divides the space into discrete and controllable regions by setting up an array of independently controlled light sources 111. Each light source 111 covers a fixed angle range, replacing the mechanical rotating shaft and realizing electronic tracking. Combined with the Fresnel lens group 120, the beam emitted by the light source 111 is compressed again, further narrowing the beam angle. This avoids the use of multiple lens groups, reduces the size, and realizes dynamic beam tracking with a static hardware structure. It fundamentally replaces the traditional mechanical rotating shaft system and achieves the effects of miniaturization, low power consumption, and high-precision light-tracking and supplementary lighting.

[0044] In one embodiment, the light source 111 is configured to emit a beam with a 50% beam angle ≤ 20° to concentrate the light spot and improve the central illumination. The 50% beam angle, also known as the half-peak beam angle, is a key parameter in optics describing the beam concentration of the light source 111 or luminaire. When light passes through a lens or reflector, it forms a light intensity distribution in space. The 50% beam angle refers to the light intensity (peak intensity I) along the central axis of the beam. max The angle between two rays corresponding to 50% of the beam represents the area where the light is most concentrated. The smaller the angle, the narrower the beam and the more concentrated the energy.

[0045] Combination Figure 5As shown, in one embodiment, the focal length F of the Fresnel lens group 120 is 12mm to 30mm. The Fresnel lens group 120 is configured to compress the light beams of each light source 111 to 50% of the beam angle, 3° to 10°, and further narrow the beam angle to 3°-10°. The light source 111 itself has divergence. The Fresnel lens, through the focal length F, controls the recombination of the divergent light into parallel or near-parallel light. At the same time, it utilizes the initial divergence angle of the light source 111 to expand the effective deflection range, enhance the deflection capability of the off-axis beam, balance the beam compression efficiency and deflection range, ensure that the off-axis beam still maintains collimation characteristics, and improve the illumination concentration at long distances (10-20m).

[0046] like Figure 8 As shown, in one embodiment, the light source 111 includes a light-emitting element 1111 and an encapsulation layer 1112. The light-emitting element 1111 is used to emit light. In this embodiment, the light-emitting element 1111 is an LED chip (Light Emitting Diode Chip). In other embodiments, the light-emitting element 1111 can also be an LD chip (Laser Diode). The encapsulation layer 1112 covers the light-emitting element 1111, and the end face of the encapsulation layer 1112 facing away from the light-emitting element 1111 has a near-ellipsoidal structure. The light-emitting element 1111 is located at the focal point of the near-ellipsoid of the encapsulation layer 1112. The refractive index of the encapsulation layer 1112 is n, where 1.2 ≤ n ≤ 1.4, i.e., n = 1.3 ± 0.1. This refractive index is close to that of air, reducing interface reflection loss and simultaneously achieving collimation of the main beam in conjunction with the ellipsoidal surface. In this embodiment, the encapsulation layer 1112 is made of silicone material, but this is not a limitation. Figure 8 As shown, the encapsulation layer 1112 collimates the light to a small beam angle (≤20°), so that the light is concentrated and emitted directly forward, thereby enabling the light source 111 to emit a beam with a beam angle ≤20° of 50%.

[0047] In one embodiment, the light source 111 further includes a light-blocking layer disposed on the outer edge region of the encapsulation layer 1112 with an included angle of not less than 120°. In this embodiment, the light-blocking layer is a white adhesive layer with high reflectivity, used to reflect stray light with an angle >120° back into the silicone. After multiple reflections, some of the light re-enters the forward light path, reflecting stray light rather than absorbing it, thus converting ineffective light into effective illumination. In other embodiments, the light-blocking layer can also be a black adhesive layer capable of absorbing stray light.

[0048] like Figure 8 As shown, in one embodiment, the surface of the light-emitting element 1111 is coated with a fluorescent film 1113 to adapt to the requirements of white light scenarios.

[0049] like Figure 9As shown, in one embodiment, the light source 111 includes a light-emitting element 1111 and a superlens 1114. The light-emitting element 1111 is used to emit light. In this embodiment, the light-emitting element 1111 is an LED chip (Light Emitting Diode Chip). In other embodiments, the light-emitting element 1111 can also be an LD chip (Laser Diode). The superlens 1114 is spaced apart from the light-emitting element 1111 by a distance of 0.1 mm to 0.3 mm. The superlens 1114 is used to collimate the light emitted by the light-emitting element 1111 through refraction and diffraction. The superlens 1114 diffracts and compresses the point light source 111, thereby enabling the light source 111 to emit a beam with a beam angle ≤20° of 50% of the beam angle. In this embodiment, the superlens 1114 is made of hard silicone or glass. When the adhesion to the encapsulating silicone is insufficient, the superlens 1114 can be hermetically sealed, but this is not a limitation.

[0050] like Figure 9 As shown, in one embodiment, the surface of the superlens 1114 is coated with a fluorescent film 1113 to adapt to the requirements of white light scenes.

[0051] like Figure 8 and Figure 9 As shown, in this embodiment, the light source 111 further includes a base 1115 for placing the light-emitting element 1111, so as to stabilize the position of the light-emitting element 1111.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A light-tracking and supplemental lighting device, characterized in that, The tracking and supplementary lighting device includes: A light panel includes multiple arrayed light sources, each of which is independently controlled and configured to emit directional light beams. The light panel is configured to illuminate multiple light sources at different positions to form a directional fan-shaped light beam. A Fresnel lens group is located on the light-emitting side of the lamp panel, and different light sources are configured to emit beams of different axes or off-axis beams toward the Fresnel lens group.

2. The tracking and supplementary lighting device according to claim 1, characterized in that, The light source is configured to emit a beam with a beam angle ≤ 20° for 50% of the time.

3. The tracking and supplementary lighting device according to claim 2, characterized in that, The Fresnel lens group has a focal length of 12mm to 30mm and is configured to compress the beam of each of the light sources to 50% of the beam angle of 3° to 10°.

4. The tracking and supplementary lighting device according to claim 2, characterized in that, The light source includes: Light-emitting components, used to emit light; An encapsulation layer covers the light-emitting element, and the end face of the encapsulation layer facing away from the light-emitting element has a near-ellipsoidal structure. The light-emitting element is located at the focal point of the near-ellipsoidal line of the encapsulation layer, and the refractive index of the encapsulation layer is n, where 1.2≤n≤1.

4.

5. The tracking and supplementary lighting device according to claim 4, characterized in that, The light source also includes a light-blocking layer, which is disposed on the outer edge region of the encapsulation layer with a normal angle of not less than 120°.

6. The tracking and supplementary lighting device according to claim 4, characterized in that, The surface of the light-emitting element is coated with a fluorescent film.

7. The tracking and supplementary lighting device according to claim 2, characterized in that, The light source includes: Light-emitting components, used to emit light; A superlens is provided at a distance of 0.1 mm to 0.3 mm from the light-emitting element, and the superlens is used to collimate the light emitted by the light-emitting element through refraction and diffraction.

8. The tracking and supplementary lighting device according to claim 7, characterized in that, The surface of the superlens is coated with a fluorescent film.

9. A camera, characterized in that, Includes the light tracking and supplementary lighting device as described in any one of claims 1 to 8.

10. The camera according to claim 9, characterized in that, The camera also includes an imaging module for shooting and a global fill light module. The global fill light module has a set tracking area and is configured to trigger a signal when a target appears in the tracking area. The tracking fill light device is configured to be triggered when the global fill light module triggers the signal and illuminate the light source in the corresponding area either constantly or strobe.

Images