A multi-channel fill light driver circuit for a camera and a camera

Abstract

This utility model relates to the field of video surveillance technology, and in particular to a multi-channel fill light driving circuit for a camera and a camera. The multi-channel fill light driving circuit includes a driver, multiple sets of fill lights, and multiple sets of switching components. The driver is connected to a controller. Each set of fill lights has a first connection terminal and a second connection terminal. Each set of fill lights includes at least two fill lights, and at least one fill light in each set is connected in parallel with the remaining fill lights in the opposite direction between the first and second connection terminals. The switching control signal input terminal of the switching components is connected to the I / O pin of the controller, and one input terminal of the switching components is connected to the positive output terminal of the driver. This utility model's multi-channel fill light driving circuit enables one driver to control multiple sets of fill lights, reducing the requirement for the number of I / O pins of the controller, especially the number of PWM pins. It can independently control the switching of fill lights at each position, ensuring continuous fill light even when the lens does not rotate.

Description

Technical Field

[0001] This utility model relates to the field of video surveillance technology, and in particular to a multi-channel fill light driving circuit for a camera and a camera. Background Technology

[0002] Current methods for supplementary lighting in dome-shaped cameras include in-dome lighting and fixed external lighting. In-dome lighting, through structural design, can generally rotate synchronously with the lens vertically and horizontally. When the lens and lighting rotate synchronously, they are in the same cavity, leading to light leakage due to reflection and refraction within the dome. External lighting effectively avoids this leakage problem, but the lighting cannot rotate with the lens, requiring an increased number of lights to provide illumination throughout the lens's rotation range. To achieve more uniform lighting, more lights need to be distributed across 360°. Simultaneous lighting results in high power consumption, necessitating individual light control. Existing methods require numerous driver chips, leading to complex and redundant control circuitry, high power consumption, and the need for more PWM or DA pins in the controller. Utility Model Content

[0003] This utility model provides a multi-channel fill light driver circuit for a camera, which solves the problems of existing technologies that require a large number of driver chips for control, resulting in complex and redundant control circuits, high power consumption, and the need for more PWM pins or DA pins in the controller.

[0004] This utility model provides a multi-channel fill light driving circuit for a camera, including: A driver, which is connected to the controller; Multiple sets of fill lights, each set of fill lights having a first connection end and a second connection end, each set of fill lights including at least two fill lights, at least one of the fill lights in each set being connected in parallel between the first connection end and the second connection end in the opposite direction to the remaining fill lights; Multiple sets of switching components are provided. The switching control signal input terminal of each switching component is connected to the I / O pin of the controller. One input terminal of each switching component is connected to the positive output terminal of the driver, and the other input terminal of each switching component is connected to the negative output terminal of the driver. In any two sets of switching components, the output terminal of one switching component is connected to the first connection terminal, and the output terminal of the other switching component is connected to the second connection terminal. At the same time, the output terminal of one switching component is connected to the positive output terminal of the driver, and the output terminal of the other switching component is connected to the negative output terminal of the driver; or, the output terminal of one switching component is connected to the negative output terminal of the driver, and the output terminal of the other switching component is connected to the positive output terminal of the driver.

[0005] According to the present invention, a multi-channel fill light driving circuit for a camera is provided, wherein the switch control signal input terminals of multiple sets of switch components are connected one-to-one with multiple IO pins of the controller.

[0006] According to the present invention, a multi-channel fill light driving circuit for a camera is provided. The switching assembly includes a first switch and a second switch. The switch control signal input terminals of the first switch and the second switch are connected to the I / O pins of the controller. The input terminal of the first switch is connected to the positive output terminal of the driver, and the input terminal of the second switch is connected to the negative output terminal of the driver. In any two sets of the switching assemblies, in one set, the output terminals of the first switch and the second switch are both connected to the first connection terminal, and in the other set, the output terminals of the first switch and the second switch are both connected to the second connection terminal.

[0007] According to the camera multi-channel fill light driving circuit provided by this utility model, in the same group of switch components, the signal input terminal of the first switch and the switch control signal input terminal of the second switch are both connected to the same IO pin of the controller.

[0008] According to the present invention, a multi-channel fill light driving circuit for a camera is provided. The first switching component includes a P-MOS transistor, and the second switching component includes an N-MOS transistor. In the same group of switching components, the gate G of the P-MOS transistor and the gate G of the N-MOS transistor are both connected to the same IO pin of the controller. The drain D of the P-MOS transistor is connected to the positive output terminal of the driver, and the source S of the N-MOS transistor is connected to the negative output terminal of the driver. In any two groups of switching components, in one group, the source S of the P-MOS transistor and the drain D of the N-MOS transistor are both connected to the first connection terminal, and in the other group, the source S of the P-MOS transistor and the drain D of the N-MOS transistor are both connected to the second connection terminal.

[0009] According to the multi-channel fill light driving circuit for a camera provided by this utility model, in any two sets of the switching components, when the gate G of one set of P-MOS transistors and the gate G of the N-MOS transistors are both at a low level, and the gate G of the other set of P-MOS transistors and the gate G of the N-MOS transistors are both at a high level, at least one fill light in the corresponding set of fill lights is lit; when the gate G of one set of P-MOS transistors and the gate G of the N-MOS transistors are both at a high level, and the gate G of the other set of P-MOS transistors and the gate G of the N-MOS transistors are both at a low level, the remaining fill lights in the corresponding set of fill lights are lit.

[0010] According to the present invention, a multi-channel fill light driving circuit for a camera is provided, wherein each group of fill lights includes two fill lights, the positive terminal of one fill light and the negative terminal of the other fill light are both connected to the first connection terminal, and the negative terminal of one fill light and the positive terminal of the other fill light are both connected to the second connection terminal.

[0011] According to the present invention, a multi-channel fill light driving circuit for a camera is provided, wherein a plurality of fill lights are arranged sequentially and spaced apart around the outer periphery of the lens in a circumferential direction.

[0012] According to the multi-channel fill light driving circuit for a camera provided by this utility model, if the number of I / O pins of the controller is n, then the number of fill lights is n×(n-1).

[0013] This utility model also provides a camera, which includes the camera multi-channel fill light driving circuit described in any of the above claims.

[0014] The multi-channel fill light driving circuit for cameras provided by this utility model sets multiple sets of switching components between multiple sets of fill lights, drivers, and controllers, and makes the connection method of at least one fill light in each set of fill lights opposite to the connection method of the remaining fill lights. In this way, in any two sets of switching components, the output terminal of one switching component is connected to the positive output terminal of the driver, and the output terminal of the other switching component is connected to the negative output terminal of the driver, so that a portion of the fill lights in each set of fill lights are lit; or, the output terminal of one switching component is connected to the negative output terminal of the driver, and the output terminal of the other switching component is connected to the positive output terminal of the driver, so that the remaining fill lights in each set of fill lights are lit. This realizes that one driver controls multiple sets of fill lights, reduces the requirement for the number of I / O pins of the controller, especially the number of PWM pins, and can independently control the switching of fill lights at each position, so that the fill lights can still provide full-time fill light even when the lens does not rotate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a detailed circuit diagram of the multi-channel fill light drive circuit for the camera provided by this utility model.

[0017] Figure 2 This is the circuit diagram of the driver provided by this utility model.

[0018] Reference numerals: U1, driver; S, switch assembly; S1, first switch; S2, second switch; L1, first supplementary light; L2, second supplementary light; L3, third supplementary light; L4, fourth supplementary light; L5, fifth supplementary light; L6, sixth supplementary light. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0021] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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. "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.

[0022] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0023] See Figure 1 and Figure 2 The camera's multi-channel fill light drive circuit includes a driver U1, multiple sets of fill lights, and multiple sets of switching components S. The driver U1 is connected to the controller; specifically, the PWM pin of the driver U1 is connected to the PWM pin of the controller. During operation, the controller centrally schedules and manages the operating state of the driver U1, such as the magnitude of the output current, thereby controlling the brightness of the fill lights.

[0024] Each group of supplementary lights has a first connection terminal and a second connection terminal. Each group of supplementary lights includes at least two supplementary lights connected between the first connection terminal and the second connection terminal. Preferably, each group of supplementary lights includes two supplementary lights. Of course, the number of supplementary lights is not limited to this; it can also be three, four, or more, depending on actual needs. The connection method of at least one supplementary light in each group of supplementary lights is opposite to that of the remaining supplementary lights. That is, at least one supplementary light in each group of supplementary lights is connected in parallel with the remaining supplementary lights in the opposite direction between the first connection terminal and the second connection terminal. By changing the direction of the driving current applied to the first connection terminal and the second connection terminal, different supplementary lights in each group of supplementary lights can be selectively lit, thereby achieving independent control of multiple lights without adding wiring.

[0025] The switch control signal input terminal of the switch component S is connected to the IO pin of the controller, so that the controller can control the switching of the switch component S through simple high and low level signals of the IO port without occupying dedicated function pins such as PWM or DA. One input terminal of the switch component S is connected to the positive output terminal LED+ of the driver U1, and the other input terminal of the switch component S is connected to the negative output terminal LED- of the driver U1, providing positive and negative power inputs for the subsequent formation of a complete drive circuit.

[0026] In any two sets of switch components S, the output terminal of one switch component S is connected to the first connection terminal, and the output terminal of the other switch component S is connected to the second connection terminal. Through this connection method, any two switch components S controlled by IO pins can be combined to drive a set of fill lights, which greatly improves the reusability of IO pins.

[0027] At the same time, the controller controls the output of one switch component S to conduct with the positive output terminal LED+ of driver U1, and simultaneously controls the output of the other switch component S to conduct with the negative output terminal LED- of driver U1, thereby forming a positive drive current to light up a portion of the fill lights; or, the controller controls the output of one switch component S to conduct with the negative output terminal LED- of driver U1, and simultaneously controls the output of the other switch component S to conduct with the positive output terminal LED+ of driver U1, thereby forming a reverse drive current to light up the remaining fill lights in that group. This connection method requires only one driver U1 and a very small number of I / O pins to achieve zoned and independent switching control of multiple channels and groups of fill lights, significantly simplifying the complexity of the drive circuit, reducing hardware costs and power consumption, and solving the problem of requiring a large number of driver chips and controller pins in traditional solutions. It can easily achieve zoned fill lighting without the fill lights rotating with the lens, ensuring uniform and effective fill lighting effects for the camera at any angle.

[0028] In one embodiment of this invention, the switch control signal input terminals of multiple sets of switch components S are connected one-to-one with multiple I / O pins of the controller. This way, the multiple sets of switch components S only need to occupy multiple I / O pins of the controller. This direct one-to-one correspondence makes the control logic very clear and simple; that is, the level state of each I / O pin uniquely determines the on / off state of a switch component S, greatly simplifying the complexity of software programming and the difficulty of debugging hardware circuits.

[0029] Meanwhile, since any combination of two switching components S can control a group of fill lights, the driving of a certain group of fill lights can be achieved by selecting the corresponding two switching components S through any combination of two IO pins, thus realizing a high degree of IO pin multiplexing. For example, only 4 IO pins can be used to combine 6 different control signals, thereby independently controlling the on / off state and direction of 6 groups of fill lights. If the traditional one-to-one driving method is used, 12 IO pins are required. Therefore, the number of IO pins required for the controller is greatly reduced. This configuration allows for the selection of controller chips with fewer pins, lower cost, and smaller package size, reducing hardware costs, shrinking PCB board size, and improving the overall performance and market competitiveness of the product.

[0030] Furthermore, one or more serial-input, parallel-output shift registers (such as 74HC595) can be added between the controller and multiple sets of switching components S. A small number of I / O pins of the controller (usually 2-3) are connected to the serial input of the shift register, while the multiple parallel outputs of the shift register are connected one-to-one with the signal input of each switching component S. In this way, the controller can control a large number of switching components S with very few I / O pins through serial communication, thereby enabling independent driving of more fill lights.

[0031] In one embodiment of this utility model, see reference Figure 1 The switching assembly S includes a first switch S1 and a second switch S2. This dual-switch design forms a basic unit capable of switching output polarity, providing the conditions for subsequent bidirectional drive current generation. The switching control signal input terminals of the first switch S1 and the second switch S2 are connected to a single IO pin of the controller. Complementary drive control of the two switches can be achieved through a single IO pin. For example, when the IO pin outputs a high level, one switch is turned on while the other is turned off; when the IO pin outputs a low level, the state is reversed. This configuration not only greatly reduces the number of IO pins required but also simplifies the control logic, ensuring that the two switching assemblies S will not be turned on simultaneously, thus avoiding the risk of a momentary short circuit in the power supply.

[0032] The input terminal of the first switch S1 is connected to the positive output terminal LED+ of the driver U1, and the input terminal of the second switch S2 is connected to the negative output terminal LED- of the driver U1. When the first switch S1 is turned on, the positive terminal of the driver is connected, and when the second switch S2 is turned on, the negative terminal of the driver is connected.

[0033] In any two sets of switching components S, the output terminals of the first switch S1 and the second switch S2 of one set are both connected to the first connection terminal of a set of fill lights, and the output terminals of the first switch S1 and the second switch S2 of the other set are both connected to the second connection terminal of a set of fill lights. This connection method constructs a driving structure at both ends of the fill lights. By controlling the level combination of the two IO pins connected to the two sets of switching components S (one high level and one low level, or one low level and one high level), the current can be controlled to flow from the first connection terminal to the second connection terminal, or from the second connection terminal to the first connection terminal, thereby accurately selecting to light up a certain part of the reverse parallel fill lights. Finally, with the fewest components and controllers, flexible, reliable and efficient bidirectional drive control of multiple fill lights is achieved.

[0034] In one embodiment of this utility model, see reference Figure 1The switching control signal input terminals of the first switch S1 and the second switch S2 are both connected to the same I / O pin of the controller. This connection method allows controlling a complete, switchable output polarity switch assembly S to occupy only one I / O pin of the controller, halving the required pin count compared to a scheme where each switch occupies its own I / O pin. This allows for the selection of smaller, lower-cost controller chips, or the use of the saved I / O pins for other functions, thereby improving the overall competitiveness of the product without increasing costs.

[0035] Furthermore, by connecting the control terminals of two switching devices (such as a P-MOS transistor and an N-MOS transistor) in parallel to the same I / O port, complementary driving can be achieved. That is, when the I / O port outputs a certain level, the first switching device S1 is turned on while the second switching device S2 is turned off; when it outputs another level, the state is reversed. This complementary mechanism fundamentally avoids the risk of a short circuit in the driver U1 power supply caused by both switching devices being turned on simultaneously. It eliminates the need for complex software control and greatly improves the stability and safety of the circuit operation.

[0036] In one embodiment of this utility model, see reference Figure 1 In the same set of switching components S, the gates G of the P-MOS transistor and the N-MOS transistor are both connected to the same IO pin of the controller. The drain D of the P-MOS transistor is connected to the positive output terminal LED+ of the driver U1, and the source S of the N-MOS transistor is connected to the negative output terminal LED- of the driver U1. In any two sets of switching components S, the source S of one set of P-MOS transistors and the drain D of the N-MOS transistors are both connected to the first connection terminal, and the source S of the other set of P-MOS transistors and the drain D of the N-MOS transistors are both connected to the second connection terminal.

[0037] The first switching device S1 includes a P-MOS transistor, and the second switching device S2 includes an N-MOS transistor. Since the P-MOS transistor is used to connect the load to the high-side switch of the positive power supply, and the N-MOS transistor is used to connect the load to the low-side switch of the negative power supply or ground, the combination of the two can achieve control of the current path with extremely low on-resistance and power consumption.

[0038] In the same group of switching components S, the gates G of both the P-MOS transistor and the N-MOS transistor are connected to the same I / O pin of the controller. This connection method reduces the number of I / O pins required to control a complete switching component S to only one, greatly saving the number of controller pins. When the I / O pin outputs a high level, the N-MOS transistor is turned on and the P-MOS transistor is turned off; when the I / O pin outputs a low level, the P-MOS transistor is turned on and the N-MOS transistor is turned off. This complementary operation mode fundamentally eliminates the risk of a direct short circuit between the positive and negative terminals of the power supply caused by the simultaneous conduction of the P-MOS transistor and the N-MOS transistor, eliminating the need for complex software control and significantly improving the reliability and safety of the circuit.

[0039] In the specific circuit, the drain D of the P-MOS transistor is connected to the positive output terminal LED+ of the driver U1, and the source S of the N-MOS transistor is connected to the negative output terminal LED- of the driver U1. In any two sets of switching components S, the source S of one set of P-MOS transistors and the drain D of the N-MOS transistors are both connected to the first connection terminal, and the source S of the other set of P-MOS transistors and the drain D of the N-MOS transistors are both connected to the second connection terminal.

[0040] The controller can precisely control whether the current flows from the first connection terminal to the second connection terminal or in the reverse direction by simply changing the level combination of two IO pins (e.g., one high level and one low level). This allows for selective lighting of fill lights with different connection methods in the same group, achieving the goal of flexibly grouping and independently controlling multiple fill lights with the most streamlined hardware (only one driver U1 and a very small number of IO ports).

[0041] In one embodiment of this utility model, see reference Figure 1When the gates G of one set of P-MOS transistors and the gates G of the other set of N-MOS transistors are both low, and the gates G of the other set of P-MOS transistors and the gates G of the other set of N-MOS transistors are both high, this specific combination of levels (low level, high level) establishes a positive driving voltage across the two ends of the fill light. The low-level input turns on the P-MOS transistor, connecting the positive terminal of driver U1 to the first connection terminal of each set of fill lights; the high-level input turns on the N-MOS transistor, connecting the negative terminal of driver U1 to the second connection terminal of each set of fill lights, thus forming a complete positive current loop, and at least one fill light in the corresponding set of fill lights is lit. When the gates G of one set of P-MOS transistors and the gates G of another set of N-MOS transistors are both high, and the gates G of the other set of P-MOS transistors and the gates G of another set of N-MOS transistors are both low, this opposite combination of levels (high and low) instantly reverses the voltage polarity applied to the fill light, forming a reverse current loop. This illuminates the remaining fill lights in the corresponding set. This method of directly controlling the current direction by changing the logic high and low level combination of two I / O pins allows the same set of fill lights to perform two completely different lighting functions in a time-sharing manner. Without adding any extra wiring or controllers, this greatly enriches the camera's functionality and application scenarios, further enhancing the product's integration and competitiveness.

[0042] In one embodiment of this utility model, see reference Figure 1 Each set of fill lights includes two fill lights. The positive terminal of one fill light and the negative terminal of the other fill light are both connected to the first connection terminal, and the negative terminal of one fill light and the positive terminal of the other fill light are both connected to the second connection terminal.

[0043] In one embodiment of this invention, multiple fill lights are arranged circumferentially around the outer periphery of the lens. Preferably, the distance between two adjacent fill lights is equal. The angles corresponding to the fill lights L1, L2, L3... can be marked by a program. When the lens rotates, there are angular coordinates. When the lens's angular coordinates are within the corresponding angular range, the fill light corresponding to that angle is turned on, ensuring continuous fill light during lens rotation.

[0044] In one embodiment of this utility model, if the number of I / O pins of the controller is n, then the number of fill lights is n×(n-1).

[0045] In a specific embodiment of this utility model, as shown in Figure 1, the camera multi-channel fill light driving circuit includes a driver U1, three sets of fill lights, and three sets of switching components S. The PWM pin of the driver U1 is connected to the PWM pin of the controller. For ease of understanding, the three sets of switching components S are respectively referred to as: the first set of switching components, the second set of switching components, and the third set of switching components, and the three sets of fill lights are respectively referred to as the first set of fill lights, the second set of fill lights, and the third set of fill lights.

[0046] Each set of switching components S includes a first switching element S1 and a second switching element S2. The first switching element S1 includes a P-MOS transistor, and the second switching element S2 includes an N-MOS transistor. In the first set of switching components, the gate G of both the P-MOS transistor and the N-MOS transistor is connected to the IO1 pin of the controller. The drain D of the P-MOS transistor is connected to the positive output terminal LED+ of the driver U1, and the source S of the N-MOS transistor is connected to the negative output terminal LED- of the driver U1. The source S of the P-MOS transistor and the drain D of the N-MOS transistor are both connected to the first connection terminals of the first set of fill lights and the second set of fill lights.

[0047] In the second set of switching components, the gates G of the P-MOS transistor and the N-MOS transistor are both connected to the IO2 pin of the controller. The drain D of the P-MOS transistor is connected to the positive output terminal LED+ of the driver U1. The source S of the N-MOS transistor is connected to the negative output terminal LED- of the driver U1. The source S of the P-MOS transistor and the drain D of the N-MOS transistor are both connected to the second terminal of the first set of fill lights and the first connection terminal of the third set of fill lights.

[0048] In the third set of switching components, the gates G of the P-MOS transistor and the N-MOS transistor are both connected to the IO3 pin of the controller. The drain D of the P-MOS transistor is connected to the positive output terminal LED+ of the driver U1. The source S of the N-MOS transistor is connected to the negative output terminal LED- of the driver U1. The source S of the P-MOS transistor and the drain D of the N-MOS transistor are both connected to the second terminal of the second set of fill lights and the second connection terminal of the third set of fill lights.

[0049] Each set of fill lights includes two fill lights. Specifically, the first set of fill lights includes a first fill light L1 and a third fill light L3, the second set of fill lights includes a second fill light L2 and a fourth fill light L4, and the third set of fill lights includes a fifth fill light L5 and a sixth fill light L6. The positive terminal of the first fill light L1 and the negative terminal of the third fill light L3 are both connected to the first connection terminal of the first set of fill lights, and the negative terminal of the first fill light L1 and the positive terminal of the third fill light L3 are both connected to the second connection terminal of the first set of fill lights. The positive terminal of the second fill light L2 and the negative terminal of the fourth fill light L4 are both connected to the first connection terminal of the second set of fill lights, and the negative terminal of the second fill light L2 and the positive terminal of the fourth fill light L4 are both connected to the second connection terminal of the second set of fill lights. The positive terminal of the fifth fill light L5 and the negative terminal of the sixth fill light L6 are both connected to the first connection terminal of the third set of fill lights, and the negative terminal of the fifth fill light L5 and the positive terminal of the sixth fill light L6 are both connected to the second connection terminal of the third set of fill lights.

[0050] By numbering the fill lights at different positions as L1, L2, L3, etc., when the lens rotates into the fill light range of the first fill light L1, the first fill light L1 is lit up. The controller outputs a PWM signal, and at the same time, IO1 outputs a low level 0 and IO2 outputs a high level 1, thus lighting up the first fill light L1. Similarly, the second fill light L2 is lit up, IO1 outputs a low level 0 and IO3 outputs a high level 1, etc. The specific lighting situation can be referred to Table 1 below.

[0051] Table 1

[0052] Furthermore, to make the fill light more uniform during the lens rotation stroke, IO control can be used to turn on the next adjacent fill light in the rotation direction in advance, so that the lens is in the middle of the two fill lights, making the fill light uniform from left to right. The fill lights can be arranged smoothly along the circumference in the order of L1, L2, L5, L3, L4, L6, L1. The specific lighting situation can be referred to Table 2 below.

[0053] Table 2

[0054] This utility model also provides a camera, which includes the camera multi-channel fill light driving circuit described in any of the above embodiments.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A camera multi-channel light supplementing lamp driving circuit, characterized in that, include: A driver (U1) is connected to a controller; Multiple sets of fill lights, each set of fill lights having a first connection end and a second connection end, each set of fill lights including at least two fill lights, at least one of the fill lights in each set being connected in parallel between the first connection end and the second connection end in the opposite direction to the remaining fill lights; Multiple sets of switching components (S) are provided. The switching control signal input terminal of each switching component (S) is connected to the IO pin of the controller. One input terminal of each switching component (S) is connected to the positive output terminal of the driver (U1), and the other input terminal of each switching component (S) is connected to the negative output terminal of the driver (U1). In any two sets of switching components (S), the output terminal of one switching component (S) is connected to the first connection terminal, and the output terminal of the other switching component (S) is connected to the second connection terminal. At the same time, the output terminal of one switching component (S) is connected to the positive output terminal of the driver (U1), and the output terminal of the other switching component (S) is connected to the negative output terminal of the driver (U1); or, the output terminal of one switching component (S) is connected to the negative output terminal of the driver (U1), and the output terminal of the other switching component (S) is connected to the positive output terminal of the driver (U1).

2. The camera multipath light supplementing lamp driving circuit according to claim 1, characterized in that, The switch control signal input terminals of the multiple sets of switch components (S) are connected one-to-one with the multiple IO pins of the controller.

3. The camera multipath light supplementing lamp driving circuit according to claim 1, characterized in that, The switching assembly (S) includes a first switch (S1) and a second switch (S2). The switch control signal input terminals of the first switch (S1) and the second switch (S2) are connected to the IO pins of the controller. The input terminal of the first switch (S1) is connected to the positive output terminal of the driver (U1), and the input terminal of the second switch (S2) is connected to the negative output terminal of the driver (U1). In any two sets of the switching assemblies (S), in one set, the output terminals of the first switch (S1) and the second switch (S2) are both connected to the first connection terminal, and in the other set, the output terminals of the first switch (S1) and the second switch (S2) are both connected to the second connection terminal.

4. The camera multipath light supplementing lamp driving circuit according to claim 3, characterized in that, In the same group of switch assemblies (S), the signal input terminal of the first switch (S1) and the switch control signal input terminal of the second switch (S2) are both connected to the same IO pin of the controller.

5. The camera multipath light supplementing lamp driving circuit according to claim 3 or 4, characterized in that, The first switching device (S1) includes a P-MOS transistor, and the second switching device (S2) includes an N-MOS transistor. In the same group of switching components (S), the gate G of the P-MOS transistor and the gate G of the N-MOS transistor are both connected to the same IO pin of the controller. The drain D of the P-MOS transistor is connected to the positive output terminal of the driver (U1), and the source S of the N-MOS transistor is connected to the negative output terminal of the driver (U1). In any two groups of switching components (S), the source S of one group of P-MOS transistors and the drain D of the N-MOS transistors are both connected to the first connection terminal, and the source S of the other group of P-MOS transistors and the drain D of the N-MOS transistors are both connected to the second connection terminal.

6. The camera multipath light supplementing lamp driving circuit according to claim 5, characterized in that, In any two sets of switching components (S), when the gate G of one set of P-MOS transistors and the gate G of the other set of P-MOS transistors are both at a low level, and the gate G of the other set of P-MOS transistors and the gate G of the other set of N-MOS transistors are both at a high level, at least one of the fill lights in the corresponding set of fill lights is lit; when the gate G of one set of P-MOS transistors and the gate G of the other set of P-MOS transistors are both at a high level, and the gate G of the other set of P-MOS transistors and the gate G of the other set of N-MOS transistors are both at a low level, the remaining fill lights in the corresponding set of fill lights are lit.

7. The camera multipath light supplementing lamp driving circuit according to any one of claims 1 to 4, characterized in that, Each set of supplementary lights includes two supplementary lights, with the positive terminal of one supplementary light and the negative terminal of the other supplementary light both connected to the first connection terminal, and the negative terminal of one supplementary light and the positive terminal of the other supplementary light both connected to the second connection terminal.

8. The camera multipath light supplementing lamp driving circuit according to any one of claims 1 to 4, characterized in that, Multiple fill lights are arranged circumferentially around the outer periphery of the lens.

9. The camera multipath light supplementing lamp driving circuit according to any one of claims 1 to 4, characterized in that, If the number of I / O pins of the controller is n, then the number of fill lights is n×(n-1).

10. A video camera characterized by comprising: The camera includes the camera multi-channel fill light driving circuit according to any one of claims 1 to 9.

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