Light supplementing system for monitoring devices and method of implementing the same

Abstract

The present disclosure provides a light supplement system for monitoring equipment and a method for implementing the same. The light supplement system comprises a lamp cup having an inner cavity at its bottom; a plurality of light sources arranged in the inner cavity, and a center of at least one of the plurality of light sources is offset relative to a center of the bottom of the lamp cup, so that light rays emitted from the lamp cup exhibit polarization; and a light source driving circuit for controlling driving current of each of the plurality of light sources, and adjusting the overall polarization degree of the light rays emitted from the lamp cup by adjusting the proportion of the driving current of the plurality of light sources, wherein the lamp cup is formed to be capable of changing the propagation direction of the light rays of the plurality of light sources to emit them to the outside of the lamp cup.

Description

Technical Field

[0001] This disclosure relates to the field of surveillance, and more specifically, to a supplementary lighting system for surveillance equipment and a method implemented by the surveillance supplementary lighting system. Background Technology

[0002] Surveillance equipment typically uses CMOS image sensors. In low-light environments with insufficient illumination, the signal-to-noise ratio is extremely low, resulting in poor image quality. Therefore, supplementary lighting is often needed to increase ambient light and improve image quality. Traditional supplementary lighting can achieve symmetrical circular illumination. However, when surveillance equipment is suspended from the ceiling or placed on a table, a reflective surface exists near the equipment in the vertical direction. This causes the light emitted by the traditional supplementary lighting to be reflected by this surface and then enter the lens module of the surveillance equipment. Due to the high intensity of the reflected light at close range, the image captured by the surveillance equipment may be overexposed or appear blurry, affecting image quality. Summary of the Invention

[0003] One aspect of this disclosure provides a supplementary lighting system for a monitoring device, comprising: a lamp cup having an inner cavity at its bottom; a plurality of light sources disposed within the inner cavity, wherein the center of at least one of the plurality of light sources is offset relative to the center of the bottom of the lamp cup, such that light emitted from the lamp cup is polarized; and a light source driving circuit for controlling the driving current of each of the plurality of light sources and adjusting the overall polarization degree of the light emitted from the lamp cup by adjusting the ratio of the driving currents of the plurality of light sources, wherein the lamp cup is configured to change the propagation direction of the light from the plurality of light sources to emit it outside the lamp cup.

[0004] Optionally, the plurality of light sources includes two light sources, which are symmetrical about the center of the bottom of the lamp cup.

[0005] Optionally, the lamp cup includes an outer wall and an inner wall forming the inner cavity; the outer wall includes a total reflection portion and an emission portion; the inner wall includes a first transmission portion and a second transmission portion; the first transmission portion transmits incident light onto it to the emission portion; the second transmission portion transmits incident light onto it to the total reflection portion; the total reflection portion reflects incident light onto it to the emission portion; and the emission portion emits incident light onto it to the outside of the lamp cup.

[0006] Optionally, the first transmissive portion includes a deflection structure for deflecting light incident thereon.

[0007] Optionally, the deflection structure is formed to include multiple planes with different inclinations relative to the bottom of the lamp cup.

[0008] Optionally, the deflection structure is formed as a freeform surface.

[0009] Optionally, the emission portion is formed as a plane parallel or not parallel to the bottom of the lamp cup.

[0010] Optionally, the ejector portion is formed as an arc surface.

[0011] Optionally, the emission portion includes a textured structure and / or a compound eye structure.

[0012] Optionally, the plurality of light sources includes at least one of an infrared light source and a white light source.

[0013] Another aspect of this disclosure provides a method implemented by a supplemental lighting system for a monitoring device, comprising: acquiring a control signal indicating a target polarization degree of the supplemental lighting system; and adjusting the ratio of the driving currents of a plurality of light sources using a light source driving circuit in the supplemental lighting system according to the control signal to achieve the target polarization degree, wherein the supplemental lighting system is a supplemental lighting system according to any of the preceding claims.

[0014] The supplementary lighting system provided in this embodiment achieves polarized supplementary lighting by offset between the light source and the lamp cup, and further achieves the adjustability of polarized supplementary lighting by adjusting the ratio of the driving current among multiple light sources, thereby reducing or even avoiding the problem of poor imaging quality caused by near-field planar reflection of monitoring equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure, and are not intended to limit this disclosure.

[0016] Figure 1A An exemplary supplemental lighting system according to an embodiment of this disclosure is shown;

[0017] Figure 1B A schematic three-dimensional view of a lamp cup in a supplemental lighting system according to an embodiment of the present disclosure is shown;

[0018] Figure 1C Showing with Figure 1B A schematic optical path diagram corresponding to the lamp cup in the diagram;

[0019] Figure 1D and Figure 1E Show Figure 1A An exemplary illuminance distribution diagram of an exemplary supplemental lighting system;

[0020] Figure 2A Another exemplary supplemental lighting system according to an embodiment of this disclosure is shown;

[0021] Figure 2BAnother schematic three-dimensional view of a lamp cup in a supplemental lighting system according to an embodiment of the present disclosure is shown;

[0022] Figure 2C Showing with Figure 2B A schematic optical path diagram corresponding to the lamp cup in the diagram;

[0023] Figure 2D and Figure 2E Show Figure 2A An exemplary illuminance distribution diagram of an exemplary supplemental lighting system;

[0024] Figure 3A This illustrates yet another exemplary supplemental lighting system according to an embodiment of the present disclosure;

[0025] Figure 3B A further schematic three-dimensional view of a lamp cup in a supplemental lighting system according to an embodiment of the present disclosure is shown;

[0026] Figure 3C Showing with Figure 3B A schematic optical path diagram corresponding to the lamp cup in the diagram;

[0027] Figure 3D and Figure 3E Show Figure 3A An exemplary illuminance distribution diagram of an exemplary supplemental lighting system;

[0028] Figure 4 A method implemented by a supplemental lighting system according to an embodiment of the present disclosure is shown. Detailed Implementation

[0029] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. The drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure. Furthermore, in the drawings, the same reference numerals denote components of the same or similar structures or functions, and repeated descriptions of them will be omitted in the following description.

[0030] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components.

[0031] It should be noted that the various components or parts described in the various embodiments of this disclosure are merely illustrative. In some cases, some components or parts may be omitted, or some components or parts may be replaced with other components or parts that have the same or similar functions, or additional components or parts may be added.

[0032] Furthermore, the various components or assemblies described in the different embodiments of this disclosure are merely for ease of description and do not imply actual physical separation or combination, nor do they imply that such separation or combination is necessary. Those skilled in the art can arbitrarily disassemble or combine the various components or assemblies according to actual needs.

[0033] As mentioned earlier, traditional supplementary lighting typically employs a circularly symmetrical structure. When monitoring equipment is installed by hanging from the ceiling or placing on a table, a reflective surface is formed on the ceiling or table adjacent to the equipment in the vertical direction. Part of the light emitted by the traditional supplementary lighting is reflected by this surface and directly enters the lens module of the monitoring equipment. Due to the high intensity of the reflected light at close range, it easily causes overexposure, whitening, or overall blurring of the captured image, severely affecting the imaging quality and usability of the monitoring equipment. This monitoring equipment includes any device that needs to perform imaging, identification, and ranging functions in low-light environments (such as tunnels or at night). Therefore, this disclosure proposes a supplementary lighting system for monitoring equipment that, while maintaining high-efficiency light output, can achieve adjustable polarized supplementary lighting, reducing or even avoiding the poor imaging quality caused by near-field planar reflections from the monitoring equipment.

[0034] Figure 1A An exemplary supplemental lighting system according to an embodiment of this disclosure is shown. Figure 1B A schematic three-dimensional view of a lamp cup in a supplemental lighting system according to an embodiment of the present disclosure is shown. Figure 1C Showing with Figure 1B The schematic optical path diagram corresponding to the lamp cup in the diagram.

[0035] refer to Figure 1A and Figure 1BThe supplementary lighting system 1 for monitoring equipment may include a lamp cup 11, multiple light sources 12, and a light source driving circuit 13. The bottom of the lamp cup 11 has an inner cavity 14, allowing the multiple light sources 12 to be placed within the cavity 14. The lamp cup 11 is configured to change the propagation direction of the light from these light sources 12, causing it to exit the lamp cup 11. It should be understood that the multiple light sources 12 shown in the figure, including two light sources 12-a and 12-b, are merely examples; the number of light sources can be more than two. Depending on the imaging requirements of the monitoring equipment application scenario, the multiple light sources 12 may include at least one of infrared light sources and white light sources. Furthermore, the center of at least one of the multiple light sources 12 may be offset relative to the center of the bottom of the lamp cup 11 (represented by O1 in the figure), thereby allowing the light from the multiple light sources 12 to be polarized as a whole when emitted from the lamp cup 11. The light source driving circuit 13 can control the driving current of each of the multiple light sources, and the overall polarization degree of the light from the multiple light sources 12 when emitted from the lamp cup 11 can be adjusted by adjusting the ratio of the driving currents of the multiple light sources 12.

[0036] The light source driving circuit 13 can be implemented in various ways, such as digital, analog, or a combination of both. For example, in a digital implementation, a microprocessor (MCU) or field-programmable gate array (FPGA) can be used to generate multiple pulse-width modulation (PWM) signals with adjustable duty cycles corresponding to each of the plurality of light sources 12 to drive the controlled current source of each light source. The ratio of the driving currents of the multiple light sources can be adjusted by adjusting the ratio of the duty cycles of these multiple PWM signals. For example, in an analog implementation, a constant current control loop can be constructed using a single reference voltage source with sampling resistors of different ratios and operational amplifiers, so that the multiple output currents corresponding to each of the plurality of light sources 12 are distributed according to the resistor ratio. This disclosure does not describe the specific implementation of the light source driving circuit 13 in detail to avoid obscuring the subject matter of this disclosure.

[0037] The lamp cup 11 can have a symmetrical structure or an asymmetrical structure. Since there is an offset between the center of at least one light source and the center O1 of the bottom of the lamp cup 11, even when the lamp cup 11 has a symmetrical structure, it can be ensured that the light from multiple light sources 12 is polarized as a whole when emitted through the lamp cup 11.

[0038] The number and arrangement of the multiple light sources 12 are varied. In one example, the multiple light sources 12 may include two light sources 12-a and 12-b, and these two light sources may be offset to the left and right respectively relative to the center O1 of the bottom of the lamp cup 11, or even be symmetrical about the left and right sides of the center O1 of the bottom of the lamp cup 11. In another example, the multiple light sources 12 may include two light sources 12-a and 12-b, and these two light sources are arranged such that one light source is aligned with the center O1 of the bottom of the lamp cup 11 while the other light source is offset to the left or right relative to the center O1 of the bottom of the lamp cup 11. In yet another example, the multiple light sources may include three light sources 12-a, 12-b, and 12-c, and these three light sources may be arranged such that one light source is aligned with the center O1 of the bottom of the lamp cup 11, while the other two light sources are offset to the left or right relative to the center O1 of the bottom of the lamp cup 11, or even be symmetrical about the left and right sides of the center O1 of the bottom of the lamp cup 11. This disclosure will not exhaustively list all examples. For ease of explanation, it is assumed below that the multiple light sources 12 include two light sources 12-a and 12-b, and that these two light sources are symmetrical about the center O1 of the bottom of the lamp cup 11.

[0039] As described above, the supplementary lighting system 1 proposed in this disclosure achieves polarized supplementary lighting by offsetting at least one of the multiple light sources 12 from the center of the bottom of the lamp cup 11, and also achieves adjustable polarized supplementary lighting by adjusting the ratio between the driving currents of the multiple light sources 12. This allows the supplementary lighting system 1 to adapt to different lighting environments, thereby reducing or even avoiding the problem of poor image quality caused by near-field planar reflections from monitoring equipment.

[0040] Furthermore, this disclosure proposes improvements to the structure of the lamp cup 11 to further optimize the overall polarization of the light emitted from the multiple light sources 12 from the supplementary lighting system 1. Three exemplary structures of the lamp cup 11 are provided below, but it should be understood that this disclosure is not limited thereto, and other feasible structures can be obtained by modifying or combining these exemplary structures.

[0041] Combination Figure 1A , Figure 1B and Figure 1C The lamp cup 11 may include an outer wall and an inner wall forming the inner cavity 14. For ease of understanding, Figure 1A and Figure 1CThe inner wall is represented by a thick solid line. The outer wall includes a total reflection section 15 and an emission section 16. The inner wall includes a first transmission section 17 and a second transmission section 18. The first transmission section 17 transmits incident light to the emission section 16. The second transmission section 18 transmits incident light to the total reflection section 15. The total reflection section 15 reflects incident light to the emission section 16. The emission section 16 emits incident light to the outside of the lamp cup 11. The first transmission section 17 includes a deflection structure for deflecting incident light, and this deflection structure is formed as multiple planes with different inclinations relative to the bottom of the lamp cup 11. For example, Figure 1A and Figure 1C The diagram shows that the plurality of planes may include three planes, one of which has a zero angle of inclination relative to the bottom of the lamp cup 111, and the other two planes have an angle of inclination greater than zero relative to the bottom of the lamp cup 11 (e.g., the example in the diagram is shown as about 30 degrees).

[0042] Figure 1C l in 11 l 12 l 13 l 14 and l 15 These represent the propagation paths (also known as light paths) of the five light rays emitted from light source 12-b. For example, light path l... 12 l 13 and l 14 As shown, the three small-angle rays emitted from the light source 12-b are deflected after being transmitted through the first transmission section 17, and then directly exit from the emission section 16. And as shown in path l... 11 and l 15 As shown, two large-angle rays emitted from light source 12-b are refracted after being transmitted through the second transmission section 18 and then incident on the total internal reflection section 15. After being reflected by the total internal reflection section 15, they are incident on the exit section 16 and finally exited from the exit section 16. (Optical path 1) 11 l 12 l 13 l 14 and l 15 The direction of the emitted light beam is deflected to the left relative to the lamp cup 11. Figure 1CIt is not possible to show all the light emitted from light source 12-b, but it should be understood that most of the light emitted from light source 12-b is polarized to the left of lamp cup 11 when it exits. In this process, the total internal reflection section 15 primarily focuses on concentrating large-angle light and controlling the beam angle; its specific shape and structure can be determined based on the desired light output and supplementary lighting range. The first transmission section 17 and the second transmission section 18 primarily deflect the light; however, it should be understood that there are special cases where light is incident perpendicularly to the first transmission section 17 or the second transmission section 18, in which case the perpendicularly incident light is not deflected. The combination of these three elements ensures that the light emitted from light source 12-b exhibits the desired polarization effect when it finally exits from the exit section 16.

[0043] For the sake of simplicity, Figure 1C The propagation paths of light rays emitted from light source 12-a are not shown, but it is easy to understand that these propagation paths are similar to the aforementioned light path l. 11 l 12 l 13 l 14 and l 15 Similarly, most of the emitted light rays will be skewed to the right relative to the lamp cup 11, that is, the light emitted from the light source 12-a will be skewed to the right of the lamp cup 11 when it is emitted through the lamp cup 11.

[0044] In this way, by improving the structure of the lamp cup 11, including designing a deflection structure for the first transmission part 17 in its inner cavity 14, the polarization degree of the light emitted from the lamp cup 11 by the multiple light sources 12 can be further optimized, so that the supplementary lighting system 1 can better meet the needs of specific application scenarios.

[0045] It should be understood that, such as Figure 1A and 1C The design of the deflection structure of the first transmission section 17 shown is not unique. For example, the deflection structure can also be composed of two or more planes joined together, and the inclination of each plane can also be changed. For example, the refractive index of the lamp cup material can be used as a factor influencing the inclination. In summary, the deflection structure can be adjusted according to the specific requirements of the polarization degree in the application scenario of the supplementary lighting system 1.

[0046] The emitting portion 16 of the lamp cup 11 can be formed as a plane parallel or non-parallel to the bottom of the lamp cup 11, or it can be formed as a curved surface, so that the emission direction and illuminance distribution of the supplementary light can be further optimized to adapt to different application scenarios. For example, the emitting portion 16 formed as a plane parallel to the bottom of the lamp cup 11 is suitable for positive supplementary lighting and conventional imaging scenarios; the emitting portion 16 formed as a plane non-parallel to the bottom of the lamp cup 11 is also used for positive supplementary lighting, and it is mostly designed to meet the performance-oriented polarization requirements or appearance requirements; the emitting portion 16 formed as a curved surface is suitable for large-area, wide-angle or ring supplementary lighting occasions.

[0047] The emitting portion 16 of the lamp cup 11 may also include a textured structure and / or a compound eye structure on its light-incoming or light-outgoing surface. The textured structure and / or compound eye structure can perform secondary shaping and homogenization of the light emitted from the emitting portion 16. By dispersing, redirecting, or superimposing and mixing these rays, it can effectively reduce chromatic aberration, suppress streaks and glare, and improve the spatial uniformity and angular consistency of the emitted light, making it particularly suitable for applications requiring high uniformity of supplementary lighting. Specifically, the textured structure mainly helps to diffuse and smooth the light intensity distribution, reducing non-uniformity caused by directionality, while the compound eye structure mainly helps to improve overall illuminance consistency and imaging stability.

[0048] Figure 1D and Figure 1E Show Figure 1A An exemplary illuminance distribution diagram of an exemplary supplemental lighting system.

[0049] As mentioned above, by adjusting the driving current of each of the light sources 12-a and 12-b through the light source driving circuit 13, the overall polarization degree of the light emitted from the lamp cup 11 by the multiple light sources 12 can be adjusted.

[0050] See Figure 1D The diagram shows the 1-meter illuminance distribution when the ratio of the driving currents for light sources 12-a and 12-b is adjusted to 1:0 using the light source driving circuit 13 (i.e., only light source 12-a emits light, and light source 12-b does not emit light). As shown, because only light source 12-a emits light, the light emitted from the lamp holder 11 appears to be generally biased to one side. See also... Figure 1E The figure shows the illuminance distribution over 1 meter when the ratio of the driving currents of light sources 12-a and 12-b is adjusted to 1:1 (i.e., both light sources 12-a and 12-b emit light with the same intensity). As shown, the light emitted from the lamp holder 11 exhibits a symmetrical effect. In summary, when the ratio of the driving currents between light sources 12-a and 12-b is adjusted to a non-1:1 ratio by the light source driving circuit 13, the polarization direction of the light emitted from the lamp holder 11 will follow the polarization direction of the light emitted by the light source with the larger driving current.

[0051] Figure 2A Another exemplary supplemental lighting system according to an embodiment of this disclosure is shown. Figure 2B Another schematic three-dimensional view of a lamp cup in a supplemental lighting system according to an embodiment of the present disclosure is shown. Figure 2C Showing with Figure 2B The schematic optical path diagram corresponding to the lamp cup in the diagram.

[0052] refer to Figure 2A , Figure 2B as well as Figure 2C , and Figure 1A , Figure 1B and Figure 1C The difference lies in the structure of lamp cup 21 and lamp cup 11. To avoid repetition, other similarities will not be described further. As shown in the figure, lamp cup 21 may include an outer wall and an inner wall forming the inner cavity 24. For ease of understanding... Figure 2A and Figure 2C The inner wall is represented by a thick solid line. The outer wall includes a total reflection section 25 and an emission section 26. The inner wall includes a first transmission section 27 and a second transmission section 28. The first transmission section 27 transmits incident light to the emission section 26. The second transmission section 28 transmits incident light to the total reflection section 25. The total reflection section 25 reflects incident light to the emission section 26. The emission section 26 emits incident light to the outside of the lamp cup 21. (Different from...) Figure 1A The first transmission section 17 shown here does not include the deflection structure.

[0053] Similar to lamp cup 11, the emitting portion 26 of lamp cup 21 can be formed as a plane parallel or not parallel to the bottom of lamp cup 11, or it can be formed as a curved surface. Furthermore, the emitting portion 26 of lamp cup 21 may also include textured structures and / or compound eye structures on its light-increasing or light-exiting surfaces.

[0054] Figure 2C l in 21 l 22 l 23 l 24 and l 25 These represent the propagation paths of the five light rays emitted from light source 12-b. For example, light path l... 22 l 23 l 24 As shown, the three small-angle rays emitted from light source 12-b are deflected after being transmitted through the first transmission section 27, and then directly exit from the emission section 26. And as in optical path l... 21 and l 25 As shown, two large-angle rays emitted from the light source 12-b are refracted after being transmitted through the second transmission section 28, then reflected by the total reflection section 25, and finally emitted from the emission section 26.

[0055] Figure 2D and Figure 2E Show Figure 2A An exemplary illuminance distribution diagram of an exemplary supplemental lighting system.

[0056] See Figure 2D The figure shows a 1-meter illuminance distribution when the ratio of the driving currents for light sources 12-a and 12-b is adjusted to 1:0 using the light source driving circuit 13 (i.e., only light source 12-a emits light, and light source 12-b does not emit light). As shown, because only light source 12-a emits light, the illuminance of the light emitted from the lamp holder 21 exhibits an overall bias to one side, and compared to... Figure 1D The degree of polarization is reduced because the first transmission section 27 does not include a deflection structure, resulting in a lower overall degree of polarization of the light emitted from the light source 12-b when it exits the emission section 26 compared to the overall degree of polarization of the light emitted from the light source 12-b when it exits the emission section 16. See also Figure 1E The figure shows the illuminance distribution over 1 meter when the ratio of the driving currents of light sources 12-a and 12-b is adjusted to 1:1 (i.e., both light sources 12-a and 12-b emit light with the same intensity). As shown in the figure, the illuminance of the light emitted from the lamp holder 11 is symmetrical. Figure 3A This illustrates yet another exemplary supplemental lighting system according to an embodiment of the present disclosure. Figure 3B A further schematic three-dimensional view of a lamp cup in a supplemental lighting system according to an embodiment of the present disclosure is shown. Figure 3C Showing with Figure 3B The schematic optical path diagram corresponding to the lamp cup in the diagram.

[0057] refer to Figure 3A , Figure 3B as well as Figure 3C , and Figure 1A , Figure 1B and Figure 1C as well as Figure 2A , Figure 2B and Figure 2C The differences lie in the structure of lamp cup 31, which differs from both lamp cup 11 and lamp cup 21. To avoid repetition, other similarities will not be described further. As shown in the figure, lamp cup 31 may include an outer wall and an inner wall forming the inner cavity 34. For ease of understanding, Figure 3A and Figure 3C The inner wall is represented by a thick solid line. The outer wall includes a total reflection section 35 and an emission section 36. The inner wall includes a first transmission section 37 and a second transmission section 38. The first transmission section 37 transmits incident light to the emission section 36. The second transmission section 38 transmits incident light to the total reflection section 35. The total reflection section 35 reflects incident light to the emission section 36. The emission section 36 emits incident light to the outside of the lamp cup 31. (Different from...) Figure 1A The first transmission section 17 shown in the figure and Figure 2A The second transmission section 27 shown here, the first transmission section 37 here also includes a deflection structure, and the deflection structure is formed as a free-form surface.

[0058] Similar to lamp cup 11, the emitting portion 36 of lamp cup 31 can be formed as a plane parallel or not parallel to the bottom of lamp cup 11, or it can be formed as a curved surface. Furthermore, the emitting portion 36 of lamp cup 31 may also include textured structures and / or compound eye structures on its light-increasing or light-exiting surfaces.

[0059] Figure 3C l in 31 l 32 l 33 l 34 and l 35 These represent the propagation paths of the five light rays emitted from light source 12-b. For example, path l... 32 l 33 l 34 As shown, the three small-angle rays emitted from the light source 12-b are deflected after being transmitted through the first transmission section 37, and then directly exit from the emission section 36. And as shown in path l... 31 and l 35 As shown, two large-angle rays emitted from light source 12-b are refracted after being transmitted through the second transmission section 38, then reflected by the total internal reflection section 35, and finally exited through the exiting section 36. It should be understood that there are special cases where light rays are incident perpendicularly to the first transmission section 37 or the second transmission section 38; in these special cases, the perpendicularly incident light rays are not refracted. Since the first transmission section 38 includes a deflection structure formed as a free-form surface, the overall polarization degree of the light rays ultimately exiting from the exiting section 36 is... Figure 1A The overall polarization of the light emitted from the emission section 16 is quite uniform.

[0060] Figure 3D and Figure 3E Show Figure 3A An exemplary illuminance distribution diagram of an exemplary supplemental lighting system.

[0061] See Figure 3D The figure shows a 1-meter illuminance distribution when the ratio of the driving currents for light sources 12-a and 12-b is adjusted to 1:0 using the light source driving circuit 13 (i.e., only light source 12-a emits light, and light source 12-b does not emit light). As shown in the figure, because only light source 12-a emits light, the illuminance of the light emitted from the lamp holder 21 exhibits an overall bias to one side, which is different from the previous description. Figure 1D The image shown has a considerable degree of polarization. See also... Figure 3EThe figure shows the illuminance distribution over 1 meter when the ratio of the driving currents of light sources 12-a and 12-b is adjusted to 1:1 (i.e., both light sources 12-a and 12-b emit light with the same intensity). As shown in the figure, the illuminance of the light emitted from the lamp holder 11 is symmetrical.

[0062] The three exemplary lamp cups 11, 21, and 31 described above expand the applicability and flexibility of the supplementary lighting system 1. In practice, a suitable lamp cup can be selected based on the application scenario of the monitoring equipment, the manufacturing cycle of the lamp cup itself, and the manufacturing cost. For example, lamp cups 11 and 31 have similar polarization effects and are both better than lamp cup 21, making them suitable for application scenarios with higher polarization requirements. Lamp cup 31 involves a free-form surface structure, and its manufacturing cost and cycle are longer than those of lamp cup 11. To save costs and time, lamp cup 11 can be given priority. Lamp cup 21 has a weaker polarization effect than lamp cups 11 and 31, but its structure is simpler, and its manufacturing cost and cycle are lower. When the polarization effect requirement is relatively low, lamp cup 21 can be given priority.

[0063] Figure 4 A method implemented by a supplemental lighting system according to an embodiment of the present disclosure is shown.

[0064] See Figure 4 Method 400 can be implemented by the aforementioned supplemental lighting system 1, for example by... Figure 1A , Figure 2A and Figure 3A An exemplary supplementary lighting system 1 is shown in any of the embodiments. The method 400 may include at least steps S410 and S420. In step S410, a control signal indicating the target polarization degree of the supplementary lighting system 1 may be acquired. In this step, the supplementary lighting system 1 may receive the control signal from an external source, such as a user or an external device. In step S420, the ratio of the drive currents of the plurality of light sources 12 may be adjusted using the light source drive circuit 13 in the supplementary lighting system according to the control signal to achieve the target polarization degree. For example, the MCU in the drive current circuit 13 may convert the target polarization degree indicated by the control signal into a ratio between the drive currents of the plurality of light sources 12, and then into a duty cycle of a PWM control signal for the drive current of each light source, and then drive each light source according to this duty cycle to achieve the target polarization degree.

[0065] Some embodiments of this disclosure also provide a computer program product or computer program including computer-readable instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps of a control method 400 according to some embodiments of this disclosure.

[0066] In some embodiments of this disclosure, the processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in some embodiments of this disclosure. The general-purpose processor can be a microprocessor or any conventional processor, and can be based on an x86 architecture or an ARM architecture.

[0067] In general, the various exemplary embodiments of this disclosure can be implemented in hardware or dedicated circuitry, software, firmware, logic, or any combination thereof. Some aspects can be implemented in hardware, while others can be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device. When aspects of some embodiments of this disclosure are illustrated or described as block diagrams, flowcharts, or using some other graphical representation, it will be understood that the blocks, apparatuses, systems, techniques, or methods described herein can be implemented as non-limiting examples in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers or other computing devices, or some combination thereof.

[0068] Without departing from the inventive concept of this disclosure, any of the above variations or combinations fall within the protection scope of this disclosure.

[0069] In the foregoing description, embodiments of the present disclosure have been described in conjunction with the accompanying drawings. It should be understood that the above embodiments are merely illustrative, and those skilled in the art should understand that the combination of constituent elements and processes of the present embodiments can be modified in various ways, and such modifications also fall within the scope of the present disclosure.

Claims

1. A supplementary lighting system for monitoring equipment, comprising: The lamp cup has an inner cavity at its bottom; Multiple light sources are placed in the inner cavity, and the center of at least one of the multiple light sources is offset relative to the center of the bottom of the lamp cup, so that the light emitted from the lamp cup is polarized; as well as A light source driving circuit is used to control the driving current of each of the plurality of light sources, and to adjust the overall polarization of the light emitted from the lamp cup by adjusting the ratio of the driving currents of the plurality of light sources. The lamp cup is configured to change the propagation direction of the light from the plurality of light sources so that it is emitted to the outside of the lamp cup.

2. The supplemental lighting system according to claim 1, wherein, The plurality of light sources includes two light sources, which are symmetrical about the center of the bottom of the lamp cup.

3. The supplemental lighting system according to claim 1, wherein, The lamp cup includes an outer wall and an inner wall forming the inner cavity; The outer wall includes a total reflection section and an emission section; The inner wall includes a first transmissive portion and a second transmissive portion; The first transmissive part transmits incident light onto it to the exiting part; The second transmissive portion transmits incident light onto it to the total reflection portion; The total internal reflection section reflects incident light rays back to the exiting section; and The emitting part emits light incident on it and emits it to the outside of the lamp cup.

4. The supplemental lighting system according to claim 3, wherein, The first transmissive portion includes a deflection structure for deflecting light incident thereon.

5. The supplemental lighting system according to claim 4, wherein, The deflection structure is formed to include multiple planes with different inclinations relative to the bottom of the lamp cup.

6. The supplemental lighting system according to claim 4, wherein, The deflection structure is formed as a free-form surface.

7. The supplemental lighting system according to claim 3, wherein, The emission portion is formed as a plane parallel or not parallel to the bottom of the lamp cup.

8. The supplemental lighting system according to claim 3, wherein, The ejector portion is formed as an arc surface.

9. The supplemental lighting system according to claim 7, wherein, The emission portion includes a textured structure and / or a compound eye structure.

10. The supplemental lighting system according to claim 1, wherein, The plurality of light sources includes at least one of infrared light sources and white light sources.

11. A method implemented by a supplemental lighting system for monitoring equipment, comprising: Acquire a control signal that indicates the target polarization level of the supplementary lighting system; Based on the control signal, the driving current ratio of multiple light sources in the supplementary lighting system is adjusted using the light source driving circuit in the supplementary lighting system to achieve the target polarization level. The supplementary lighting system is the supplementary lighting system according to any one of claims 1-10.

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