技术领域Technical Field
本申请涉及图像采集技术领域，特别是涉及一种补光控制电路及图像采集设备。The present application relates to the field of image acquisition technology, and in particular to a fill light control circuit and an image acquisition device.
背景技术Background Art
目前图像采集技术领域中经常会使用补光灯等来增强图像，使得图像采集设备，如相机等在不同照度的场景中获得更好的图像效果。Currently, fill lights are often used in the field of image acquisition technology to enhance images, so that image acquisition devices, such as cameras, can obtain better image effects in scenes with different illumination.
补光灯通常搭配滤光片使用，但滤光片和补光灯的控制通过软件用主控电路的不同管脚来进行控制，其硬件上没有相互关联，且补光灯的控制方式没有关联滤光片的切换，导致补光效果不佳。Fill lights are usually used with filters, but the filters and fill lights are controlled by software using different pins of the main control circuit. There is no correlation between them in hardware, and the control method of the fill light is not related to the switching of the filters, resulting in poor fill light effect.
发明内容Summary of the invention
本申请主要解决的技术问题是如何实现滤光模式切换与灯光模式切换的关联，以使得二者的切换对应，提高补光效果及图像质量。The main technical problem solved by the present application is how to realize the association between the switching of the filter mode and the switching of the light mode so that the switching of the two corresponds to each other, thereby improving the fill light effect and image quality.
为解决上述技术问题，本申请提供一种补光控制电路。所述补光控制电路包括：主控电路，设有第一输出端及第二输出端，所述主控电路基于补光需求调整所述第一输出端输出的第一电压信号或所述第二输出端输出的第二电压信号；第一驱动电路，分别与所述第一输出端及所述第二输出端电连接，所述第一驱动电路还用于与滤光片组件驱动连接，所述第一驱动电路基于调整后的所述第一电压信号驱动所述滤光片组件切换至第一滤光模式或基于调整后的所述第二电压信号驱动所述滤光片组件切换至第二滤光模式；逻辑控制电路，分别与所述第一输出端、所述第二输出端电连接，所述逻辑控制电路基于调整后的所述第一电压信号或调整后的所述第二电压信号调整输出的第三电压信号；第二驱动电路，与所述逻辑控制电路电连接，所述第二驱动电路还用于与补光灯组件电连接，所述第二驱动电路基于调整后的所述第三电压信号驱动所述补光灯组件切换至与所述第一滤光模式对应的第一灯光模式或切换至与所述第二滤光模式对应的第二灯光模式。In order to solve the above technical problems, the present application provides a fill light control circuit. The fill light control circuit includes: a main control circuit, which is provided with a first output end and a second output end, and the main control circuit adjusts a first voltage signal output by the first output end or a second voltage signal output by the second output end based on fill light requirements; a first drive circuit, which is electrically connected to the first output end and the second output end respectively, and the first drive circuit is also used to drive and connect with a filter component, and the first drive circuit drives the filter component to switch to a first filter mode based on the adjusted first voltage signal or drives the filter component to switch to a second filter mode based on the adjusted second voltage signal; a logic control circuit, which is electrically connected to the first output end and the second output end respectively, and the logic control circuit adjusts the output third voltage signal based on the adjusted first voltage signal or the adjusted second voltage signal; a second drive circuit, which is electrically connected to the logic control circuit, and the second drive circuit is also used to electrically connect with a fill light component, and the second drive circuit drives the fill light component to switch to a first light mode corresponding to the first light filter mode or to a second light mode corresponding to the second light filter mode based on the adjusted third voltage signal.
在一些实施例中，所述第一滤光模式包括夜光模式，所述第二滤光模式包括日光模式，所述第一灯光模式包括红外光模式，所述第二灯光模式包括白光模式；响应于环境的光强度小于第一阈值，所述主控电路调整所述第一输出端输出的所述第一电压信号，且保持所述第二输出端的输出所述第二电压信号不变；响应于环境的光强度大于第二阈值，所述主控电路调整所述第二输出端输出的所述第二电压信号，且保持所述第一输出端的输出所述第一电压信号不变。In some embodiments, the first light filtering mode includes a night light mode, the second light filtering mode includes a daylight mode, the first light mode includes an infrared light mode, and the second light mode includes a white light mode; in response to the ambient light intensity being less than a first threshold, the main control circuit adjusts the first voltage signal output by the first output terminal, and keeps the second voltage signal output by the second output terminal unchanged; in response to the ambient light intensity being greater than a second threshold, the main control circuit adjusts the second voltage signal output by the second output terminal, and keeps the first voltage signal output by the first output terminal unchanged.
在一些实施例中，响应于环境的光强度小于所述第一阈值，所述第一输出端输出一个第一方波信号，且所述第二输出端保持输出低电平信号；响应于环境的光强度大于所述第二阈值，所述第二输出端输出一个第二方波信号，且所述第一输出端保持输出低电平信号。In some embodiments, in response to the ambient light intensity being less than the first threshold, the first output terminal outputs a first square wave signal, and the second output terminal continues to output a low level signal; in response to the ambient light intensity being greater than the second threshold, the second output terminal outputs a second square wave signal, and the first output terminal continues to output a low level signal.
在一些实施例中，所述第三电压信号包括第一高电平信号及第二高电平信号，所述逻辑控制电路包括：触发电路，设有第一输入端及第二输入端，所述第一输入端与所述第一输出端电连接，所述第二输入端与所述第二输出端电连接，所述触发电路还设有与所述第二驱动电路电连接的第三输出端及第四输出端，所述触发电路基于所述第一方波信号从所述第三输出端输出所述第一高电平信号，以使所述第二驱动电路驱动所述补光灯组件切换至所述第一灯光模式；所述触发电路基于所述第二方波信号从所述第四输出端输出所述第二高电平信号，以使所述第二驱动电路驱动所述补光灯组件切换至所述第二灯光模式。In some embodiments, the third voltage signal includes a first high level signal and a second high level signal, and the logic control circuit includes: a trigger circuit, having a first input terminal and a second input terminal, the first input terminal is electrically connected to the first output terminal, and the second input terminal is electrically connected to the second output terminal, the trigger circuit is also provided with a third output terminal and a fourth output terminal electrically connected to the second drive circuit, the trigger circuit outputs the first high level signal from the third output terminal based on the first square wave signal, so that the second drive circuit drives the fill light component to switch to the first lighting mode; the trigger circuit outputs the second high level signal from the fourth output terminal based on the second square wave signal, so that the second drive circuit drives the fill light component to switch to the second lighting mode.
在一些实施例中，所述触发电路包括JK触发器。In some embodiments, the trigger circuit includes a JK flip-flop.
在一些实施例中，所述逻辑控制电路还包括：延时电路，分别与所述第一输出端、所述第二输出端及所述触发电路的时钟端电连接，所述延时电路将所述第一方波信号或所述第二方波信号延时处理后作为时钟信号供给所述触发电路。In some embodiments, the logic control circuit also includes: a delay circuit, which is electrically connected to the first output end, the second output end and the clock end of the trigger circuit respectively, and the delay circuit delays the first square wave signal or the second square wave signal and supplies it to the trigger circuit as a clock signal.
在一些实施例中，所述延时电路包括：异或门。In some embodiments, the delay circuit includes: an XOR gate.
在一些实施例中，所述逻辑控制电路还包括：开关电路，所述开关电路的控制端与所述延时电路电连接，所述开关电路的第一通信端与所述主控电路的控制端电连接，所述开关电路的第二通信端与所述第二驱动电路电连接；其中，所述开关电路在所述时钟信号的上升沿关断，以关断所述主控电路的调制信号对所述第二驱动电路的输出，所述开关电路在所述时钟信号的下降沿导通，以恢复所述主控电路对所述第二驱动电路的调制信号的输出。In some embodiments, the logic control circuit also includes: a switching circuit, wherein the control end of the switching circuit is electrically connected to the delay circuit, the first communication end of the switching circuit is electrically connected to the control end of the main control circuit, and the second communication end of the switching circuit is electrically connected to the second drive circuit; wherein the switching circuit is turned off at the rising edge of the clock signal to turn off the output of the modulation signal of the main control circuit to the second drive circuit, and the switching circuit is turned on at the falling edge of the clock signal to restore the output of the modulation signal of the main control circuit to the second drive circuit.
在一些实施例中，所述开关电路包括：三态门。In some embodiments, the switch circuit includes: a tri-state gate.
在一些实施例中，所述补光灯组件包括：白补光灯及红外补光灯，所述第二驱动电路包括：驱动芯片，与所述主控电路的控制端、所述白补光灯及所述红外补光灯电连接；第一开关管，所述第一开关管的控制端与所述逻辑控制电路电连接，所述第一开关管的第一通信端与所述白补光灯电连接，所述第一开关管的第二通信端与所述驱动芯片电连接；第二开关管，所述第二开关管的控制端与所述逻辑控制电路电连接，所述第二开关管的第一通信端与所述红外补光灯电连接，所述第二开关管的第二通信端与所述驱动芯片电连接。In some embodiments, the fill light assembly includes: a white fill light and an infrared fill light, and the second driving circuit includes: a driving chip, which is electrically connected to the control end of the main control circuit, the white fill light and the infrared fill light; a first switch tube, the control end of the first switch tube is electrically connected to the logic control circuit, the first communication end of the first switch tube is electrically connected to the white fill light, and the second communication end of the first switch tube is electrically connected to the driving chip; a second switch tube, the control end of the second switch tube is electrically connected to the logic control circuit, the first communication end of the second switch tube is electrically connected to the infrared fill light, and the second communication end of the second switch tube is electrically connected to the driving chip.
在一些实施例中，响应于上电，所述主控电路控制所述滤光片组件处于所述白光模式，并控制所述第二驱动电路不工作；响应于上电结束，所述主控电路基于补光需求确定是否需要切换所述滤光片组件；响应于需要切换所述滤光片组件，所述主控电路控制所述滤光片组件切换至所述夜光模式，并控制所述补光灯组件切换至所述红外光模式；响应于不需要切换所述滤光片组件，所述主控电路控制所述补光灯组件切换至所述红外光模式。In some embodiments, in response to power-on, the main control circuit controls the filter assembly to be in the white light mode, and controls the second drive circuit to not work; in response to the end of power-on, the main control circuit determines whether it is necessary to switch the filter assembly based on the fill light demand; in response to the need to switch the filter assembly, the main control circuit controls the filter assembly to switch to the night light mode, and controls the fill light assembly to switch to the infrared light mode; in response to the need not to switch the filter assembly, the main control circuit controls the fill light assembly to switch to the infrared light mode.
为解决上述技术问题，本申请提供一种图像采集设备，包括上述补光控制电路。In order to solve the above technical problems, the present application provides an image acquisition device, including the above fill light control circuit.
本申请的有益效果是：本申请的主控电路基于补光需求选择性调整其第一输出端输出的第一电压信号或第二输出端输出的第二电压信号，第一驱动电路基于调整后的第一电压信号驱动滤光片组件切换至第一滤光模式，或者基于调整后的第二电压信号驱动滤光片组件切换至第二滤光模式；同时，逻辑控制电路基于调整后的第一电压信号控制第二驱动电路驱动补光等组件切换至于第一滤光模式对应的第一灯光模式，或者基于调整后的第二电压信号控制第二驱动电路驱动补光等组件切换至于第二滤光模式对应的第二灯光模式。通过这种方式，控制第一驱动电路驱动滤光片组件切换滤光模式的信号与控制第二驱动电路驱动补光灯组件切换灯光模式的信号为同一端口输出的同一信号，能够实现滤光模式切换与灯光模式切换的关联及同步，且硬件成本低；且第一输出信号的变化与第一滤光模式及第一灯光模式关联，第二输出信号的变化与第二灯光模式及第二灯光模式关联，能够提高滤光模式与对应的灯光模式之间的关联的精准度；因此，本申请能够提高滤光模式切换与灯光模式切换之间的关联，使得二者的切换对应，从而能够提高补光效果及图像质量。The beneficial effects of the present application are: the main control circuit of the present application selectively adjusts the first voltage signal output by the first output terminal or the second voltage signal output by the second output terminal based on the fill light demand, and the first driving circuit drives the filter component to switch to the first filtering mode based on the adjusted first voltage signal, or drives the filter component to switch to the second filtering mode based on the adjusted second voltage signal; at the same time, the logic control circuit controls the second driving circuit to drive the fill light and other components to switch to the first lighting mode corresponding to the first filtering mode based on the adjusted first voltage signal, or controls the second driving circuit to drive the fill light and other components to switch to the second lighting mode corresponding to the second filtering mode based on the adjusted second voltage signal. In this way, the signal that controls the first driving circuit to drive the filter component to switch the filter mode and the signal that controls the second driving circuit to drive the fill light component to switch the lighting mode are the same signal output from the same port, which can realize the association and synchronization of the filter mode switching and the lighting mode switching, and the hardware cost is low; and the change of the first output signal is associated with the first filter mode and the first lighting mode, and the change of the second output signal is associated with the second lighting mode and the second lighting mode, which can improve the accuracy of the association between the filter mode and the corresponding lighting mode; therefore, the present application can improve the association between the filter mode switching and the lighting mode switching, so that the switching of the two corresponds, thereby improving the fill light effect and image quality.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
图1是本申请补光控制电路一实施例的结构示意图；FIG1 is a schematic structural diagram of an embodiment of a fill light control circuit of the present application;
图2是图1实施例中逻辑控制电路的电路结构示意图；FIG2 is a schematic diagram of the circuit structure of the logic control circuit in the embodiment of FIG1 ;
图3是图2实施例的逻辑控制电路的一时序示意图；FIG3 is a timing diagram of the logic control circuit of the embodiment of FIG2 ;
图4是图2实施例的逻辑控制电路的另一时序示意图；FIG4 is another timing diagram of the logic control circuit of the embodiment of FIG2 ;
图5是图1实施例中第二驱动电路及补光灯组件的电路结构示意图；FIG5 is a schematic diagram of the circuit structure of the second driving circuit and the fill light assembly in the embodiment of FIG1 ;
图6是本申请补光控制方法一实施例的流程示意图。FIG. 6 is a flow chart of an embodiment of a fill light control method of the present application.
具体实施方式DETAILED DESCRIPTION
以下描述中，为了说明而不是为了限定，提出了诸如特定系统结构、技术之类的具体细节，以便透彻理解本申请实施例。然而，本领域的技术人员应当清楚，在没有这些具体细节的其它实施例中也可以实现本申请。在其它情况中，省略对众所周知的系统、装置、电路以及方法的详细说明，以免不必要的细节妨碍本申请的描述。In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.
应当理解，当在本说明书和所附权利要求书中使用时，术语“包括”指示所描述特征、整体、步骤、操作、元素和/或组件的存在，但并不排除一个或多个其它特征、整体、步骤、操作、元素、组件和/或其集合的存在或添加。It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
还应当理解，在此本申请说明书中所使用的术语仅仅是出于描述特定实施例的目的而并不意在限制本申请。如在本申请说明书和所附权利要求书中所使用的那样，除非上下文清楚地指明其它情况，否则单数形式的“一”、“一个”及“该”意在包括复数形式。It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.
还应当进一步理解，在本申请说明书和所附权利要求书中使用的术语“和/或”是指相关联列出的项中的一个或多个的任何组合以及所有可能组合，并且包括这些组合。It should be further understood that the term “and/or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.
如在本说明书和所附权利要求书中所使用的那样，术语“如果”可以依据上下文被解释为“当...时”或“一旦”或“响应于确定”或“响应于检测到”。类似地，短语“如果确定”或“如果检测到[所描述条件或事件]”可以依据上下文被解释为意指“一旦确定”或“响应于确定”或“一旦检测到[所描述条件或事件]”或“响应于检测到[所描述条件或事件]”。As used in this specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
目前图像采集技术领域中经常会使用补光灯等来增强图像，使得图像采集设备，如相机等在不同照度的场景中获得更好的图像效果。Currently, fill lights are often used in the field of image acquisition technology to enhance images, so that image acquisition devices, such as cameras, can obtain better image effects in scenes with different illumination.
补光手段包括可见补光灯或者红外补光灯，大多情况下彩色画面使用可见补光灯（白补光灯），黑白画面使用红外补光灯，同时在切换红外补光灯时相机的镜头需要切换滤光片使得图像不偏红。Fill light methods include visible fill light or infrared fill light. In most cases, visible fill light (white fill light) is used for color images, and infrared fill light is used for black and white images. At the same time, when switching to infrared fill light, the camera lens needs to switch the filter to prevent the image from being reddish.
本申请的发明人发现，使用不同的补光手段需要搭配两路补光灯驱动，但实际应用中，白补光灯和红外补光灯分别用于彩色图像和黑色图像，二者不会同时打开，且对于通用设备来说滤光片的切换通常搭配补光灯使用，但滤光片切换和补光灯控制通过软件用不同的通用型之输入输出（General-purpose input/output，GPIO）管脚进行控制，其硬件上没有相互关联，若软件程序异常则导致滤波片切换和补光灯切换错误；不仅占用软件资源，同时也增加硬件成本，且补光效果不佳。The inventors of the present application discovered that the use of different fill light means requires the use of two fill light drivers, but in actual applications, the white fill light and the infrared fill light are used for color images and black images respectively, and the two will not be turned on at the same time. In addition, for general equipment, the switching of filters is usually used in conjunction with the fill light, but the filter switching and fill light control are controlled by software using different general-purpose input/output (GPIO) pins, and there is no mutual correlation in hardware. If the software program is abnormal, it will lead to filter switching and fill light switching errors, which not only occupies software resources, but also increases hardware costs, and the fill light effect is not good.
相关技术中，补光灯控制方式没有关联滤光片切换，都是基于图像来分别控制白补光灯和红外补光灯两个驱动，因此要分别使用两路的调制信号资源管脚和两路驱动，不仅占用软件资源，同时也增加硬件成本。In the related art, the fill light control method has no associated filter switching, and is based on images to control the two drivers of the white fill light and the infrared fill light respectively. Therefore, two modulation signal resource pins and two drivers must be used separately, which not only occupies software resources, but also increases hardware costs.
为此，本申请首先提出一种补光控制电路，用于控制滤光片组件切换滤光模式及控制补光灯组件切换灯光模式，及实现二者之间的关联，以增加补光效果，提高图像质量。如图1所示，本实施例的补光控制电路包括：主控电路10、第一驱动电路20、逻辑控制电路30及第二驱动电路40；其中，主控电路10设有第一输出端A2及第二输出端B2，主控电路10基于补光需求调整第一输出端A2输出的第一电压信号或第二输出端B2输出的第二电压信号；第一驱动电路20分别与第一输出端A2及第二输出端B2电连接，第一驱动电路20还用于与滤光片组件（图未示）驱动连接，第一驱动电路20基于调整后的第一电压信号驱动滤光片组件切换至第一滤光模式或基于调整后的第二电压信号驱动滤光片组件切换至第二滤光模式；逻辑控制电路30分别与第一输出端A2、第二输出端B2电连接，逻辑控制电路30基于调整后的第一电压信号或基于调整后的第二电压信号调整输出的第三电压信号；第二驱动电路40与逻辑控制电路30电连接，第二驱动电路40还用于与补光灯组件（图未示）电连接，第二驱动电路40基于调整后的第三电压信号驱动补光灯组件切换至与第一滤光模式对应的第一灯光模式或切换至与第二滤光模式对应的第二灯光模式。To this end, the present application first proposes a fill light control circuit, which is used to control the filter component to switch the filter mode and control the fill light component to switch the light mode, and realize the association between the two, so as to increase the fill light effect and improve the image quality. As shown in FIG1 , the fill light control circuit of the present embodiment includes: a main control circuit 10, a first drive circuit 20, a logic control circuit 30 and a second drive circuit 40; wherein the main control circuit 10 is provided with a first output terminal A2 and a second output terminal B2, and the main control circuit 10 adjusts the first voltage signal output by the first output terminal A2 or the second voltage signal output by the second output terminal B2 based on the fill light demand; the first drive circuit 20 is electrically connected to the first output terminal A2 and the second output terminal B2 respectively, and the first drive circuit 20 is also used to drive and connect with the filter component (not shown), and the first drive circuit 20 drives the filter component to switch to the first filter mode based on the adjusted first voltage signal. mode or drives the filter component to switch to the second filtering mode based on the adjusted second voltage signal; the logic control circuit 30 is electrically connected to the first output terminal A2 and the second output terminal B2, respectively, and the logic control circuit 30 adjusts the output third voltage signal based on the adjusted first voltage signal or based on the adjusted second voltage signal; the second drive circuit 40 is electrically connected to the logic control circuit 30, and the second drive circuit 40 is also used to be electrically connected to the fill light component (not shown), and the second drive circuit 40 drives the fill light component to switch to the first light mode corresponding to the first filtering mode or to the second light mode corresponding to the second filtering mode based on the adjusted third voltage signal.
其中，主控电路10基于补光需求调整第一输出端A2的第一电压信号可以是主控电路10基于补光需求改变第一电压信号的电平，例如第一电压信号由低电平调整为高电平，或者改变第一电压信号的电压值，或者第一输出端A2的输出信号由无到有等，使得第一输出端A2的输出电压得到调整，产生变化；主控电路10基于补光需求调整第二输出端B2的第二电压信号可以是主控电路10基于补光需求改变第二电压信号的电平，例如第二电压信号由低电平调整为高电平，或者改变第二电压信号的电压值，或者第二输出端B2的输出信号由无到有等，使得第二输出端B2的输出电压得到调整，产生变化。本实施例通过检测到第一电压信号及第二电压信号的变化，并根据这些变化来调整改变逻辑控制电路30的输出信号，及第三电压信号，从而控制第二驱动电路40进行补光灯组件的状态切换；且根据这些变化来控制第一驱动电路20进行滤光片组件的状态切换。Wherein, the main control circuit 10 adjusts the first voltage signal of the first output terminal A2 based on the fill light requirement, which may be that the main control circuit 10 changes the level of the first voltage signal based on the fill light requirement, for example, the first voltage signal is adjusted from a low level to a high level, or the voltage value of the first voltage signal is changed, or the output signal of the first output terminal A2 is changed from no to yes, etc., so that the output voltage of the first output terminal A2 is adjusted and changed; the main control circuit 10 adjusts the second voltage signal of the second output terminal B2 based on the fill light requirement, which may be that the main control circuit 10 changes the level of the second voltage signal based on the fill light requirement, for example, the second voltage signal is adjusted from a low level to a high level, or the voltage value of the second voltage signal is changed, or the output signal of the second output terminal B2 is changed from no to yes, etc., so that the output voltage of the second output terminal B2 is adjusted and changed. In this embodiment, by detecting the changes of the first voltage signal and the second voltage signal, and adjusting and changing the output signal of the logic control circuit 30 and the third voltage signal according to these changes, the second drive circuit 40 is controlled to switch the state of the fill light assembly; and the first drive circuit 20 is controlled to switch the state of the filter assembly according to these changes.
在一些实施例中，主控电路10可以基于图像信息或者光敏信息等确定补光需求，或者可以基于时钟信息及预设条件确定补光需求，又或者基于用户选择确定补光需求等。需要注意的是，补偿需求可以直接是图像信息或光敏信息等及预设信息，主控电路10基于这些信息调整其输出的电压信号。In some embodiments, the main control circuit 10 may determine the fill light requirement based on image information or photosensitivity information, or may determine the fill light requirement based on clock information and preset conditions, or may determine the fill light requirement based on user selection, etc. It should be noted that the compensation requirement may be directly image information or photosensitivity information and preset information, and the main control circuit 10 adjusts the output voltage signal based on this information.
例如，在一应用场景中，主控电路10可以基于环境的光强度来确定补光需求，如白天光强度较大，主控电路10通过调整其输出电压信号来控制第一驱动电路20控制滤光片组件切换至日光模式，及控制第二驱动电路40驱动补光灯组件切换至白光模式。For example, in one application scenario, the main control circuit 10 can determine the fill light requirement based on the ambient light intensity. For example, when the light intensity is high during the day, the main control circuit 10 controls the first drive circuit 20 to switch the filter assembly to the daylight mode, and controls the second drive circuit 40 to switch the fill light assembly to the white light mode by adjusting its output voltage signal.
在一些实施例中，滤光片组件可以包括至少两个不同的滤光片，如日光片及夜光片等；或者滤光片组件可以仅包括一个滤光片，在不同的补光需求下切换至滤光模式或不滤光模式；又或者滤光片组件可以包括两个以上的不同的滤光片，通过组合来实现至少两种滤光模式。In some embodiments, the filter assembly may include at least two different filters, such as a daylight filter and a night light filter; or the filter assembly may include only one filter, which switches to a filtering mode or a non-filtering mode under different fill light requirements; or the filter assembly may include more than two different filters, which are combined to achieve at least two filtering modes.
在一些实施例中，滤光片组件具体可以包括ICR滤光片，即红外双滤光片切换器，其核心功能是根据环境光线的变化自动切换滤光片，以优化图像质量。白天，ICR会让摄像机使用不感红外滤光片，滤掉杂光，只让可见光和红外光通过，确保白天拍摄的色彩真实。而在夜间，它会切换到感红外滤光片，增强可见光，减少噪点，提升低光环境下的成像效果。In some embodiments, the filter assembly may specifically include an ICR filter, i.e., an infrared dual filter switcher, whose core function is to automatically switch filters according to changes in ambient light to optimize image quality. During the day, the ICR will allow the camera to use an infrared-insensitive filter to filter out stray light, allowing only visible light and infrared light to pass through, ensuring the true color of daytime shots. At night, it will switch to an infrared-sensitive filter to enhance visible light, reduce noise, and improve imaging effects in low-light environments.
在一些实施例中，补光灯组件可以包括至少两个不同的补光灯，如白补光灯及红外补光灯等；或者补光灯组件可以仅包括一个补光灯，在不同的补光需求下切换至灯光模式或非灯光模式；又或者补光灯组件可以包括两个以上的不同的补光灯，通过组合来实现至少两种灯光模式。In some embodiments, the fill light assembly may include at least two different fill lights, such as a white fill light and an infrared fill light; or the fill light assembly may include only one fill light, which switches to a light mode or a non-light mode under different fill light requirements; or the fill light assembly may include more than two different fill lights, and at least two light modes are achieved through combination.
在其它实施例中，主控电路可以设置两个以上的输出端，通过分别调整两个以上的输出端输出的电压信号来实现两个以上的补光灯、滤光片的匹配切换。In other embodiments, the main control circuit may be provided with more than two output terminals, and the matching switching of more than two fill lights and filters may be achieved by respectively adjusting the voltage signals output by the more than two output terminals.
在一些实施例中，主控电路10可以包括片上系统（System on a Chip，SoC）、微控制单元（Micro controller Unit，MCU）等集成芯片，或者具有控制及数据处理功能的非集成式控制电路等。In some embodiments, the main control circuit 10 may include an integrated chip such as a system on a chip (SoC), a micro controller unit (MCU), or a non-integrated control circuit with control and data processing functions.
在一些实施例中，第一输出端A2及第二输出端B2为GPIO端口等。In some embodiments, the first output terminal A2 and the second output terminal B2 are GPIO ports or the like.
本实施例的主控电路10基于补光需求选择性调整其第一输出端A2输出的第一电压信号或第二输出端B2输出的第二电压信号，第一驱动电路20基于调整后的第一电压信号驱动滤光片组件切换至第一滤光模式，或者基于调整后的第二电压信号驱动滤光片组件切换至第二滤光模式；同时，逻辑控制电路30基于调整后的第一电压信号控制第二驱动电路驱动40补光等组件切换至于第一滤光模式对应的第一灯光模式，或者基于调整后的第二电压信号控制第二驱动电路40驱动补光等组件切换至于第二滤光模式对应的第二灯光模式。通过这种方式，控制第一驱动电路20驱动滤光片组件切换滤光模式的信号与控制第二驱动电路40驱动补光灯组件切换灯光模式的信号为同一端口输出的同一信号，能够实现滤光模式切换与灯光模式切换的关联及同步，且硬件成本低，软件资源占用少；且第一输出信号的变化与第一滤光模式及第一灯光模式关联，第二输出信号的变化与第二灯光模式及第二灯光模式关联，能够提高滤光模式与对应的灯光模式之间的关联的精准度；因此，本实施例能够提高滤光模式切换与灯光模式切换之间的关联，使得二者的切换对应，从而能够提高补光效果及图像质量。The main control circuit 10 of this embodiment selectively adjusts the first voltage signal output by the first output terminal A2 or the second voltage signal output by the second output terminal B2 based on the fill light demand, and the first driving circuit 20 drives the filter component to switch to the first filtering mode based on the adjusted first voltage signal, or drives the filter component to switch to the second filtering mode based on the adjusted second voltage signal; at the same time, the logic control circuit 30 controls the second driving circuit to drive 40 the fill light and other components to switch to the first light mode corresponding to the first filtering mode based on the adjusted first voltage signal, or controls the second driving circuit 40 to drive the fill light and other components to switch to the second light mode corresponding to the second filtering mode based on the adjusted second voltage signal. In this way, the signal for controlling the first driving circuit 20 to drive the filter component to switch the filtering mode and the signal for controlling the second driving circuit 40 to drive the fill light component to switch the lighting mode are the same signal output from the same port, which can realize the association and synchronization of the filtering mode switching and the lighting mode switching, and has low hardware cost and small software resource occupation; and the change of the first output signal is associated with the first filtering mode and the first lighting mode, and the change of the second output signal is associated with the second lighting mode and the second lighting mode, which can improve the accuracy of the association between the filtering mode and the corresponding lighting mode; therefore, this embodiment can improve the association between the filtering mode switching and the lighting mode switching, so that the switching of the two corresponds, thereby improving the fill light effect and image quality.
在一些实施例中，第一滤光模式包括夜光模式，第二滤光模式包括日光模式，第一灯光模式包括红外光模式，第二灯光模式包括白光模式；响应于环境的光强度小于第一阈值，主控电路10调整第一输出端A2输出的第一电压信号，且保持第二输出端B2的输出第二电压信号不变；响应于环境的光强度大于第二阈值，主控电路10调整第二输出端B2输出的第二电压信号，且保持第一输出端A2的输出第一电压信号不变。In some embodiments, the first light filtering mode includes a night light mode, the second light filtering mode includes a daylight mode, the first light mode includes an infrared light mode, and the second light mode includes a white light mode; in response to the ambient light intensity being less than a first threshold, the main control circuit 10 adjusts the first voltage signal output by the first output terminal A2, and keeps the second voltage signal output by the second output terminal B2 unchanged; in response to the ambient light intensity being greater than a second threshold, the main control circuit 10 adjusts the second voltage signal output by the second output terminal B2, and keeps the first voltage signal output by the first output terminal A2 unchanged.
其中，第一阈值可以小于或等于第二阈值。The first threshold may be less than or equal to the second threshold.
例如，主控电路10控制第一电压信号由低电平信号变为高电平信号，而第二电压信号保持低电平信号；或者主控电路10控制第一电压信号由高电平信号变成低电平信号，而第二电压信号保持高电平信号；或者主控电路10还可以通过上述电压信号的电压值变化来实现对上述电压信号的调整，通过比较器或采样电路等电路来确定上述电压信号是否发生变化。For example, the main control circuit 10 controls the first voltage signal from a low level signal to a high level signal, while the second voltage signal remains a low level signal; or the main control circuit 10 controls the first voltage signal from a high level signal to a low level signal, while the second voltage signal remains a high level signal; or the main control circuit 10 can also adjust the above voltage signal by changing the voltage value of the above voltage signal, and determine whether the above voltage signal changes through circuits such as comparators or sampling circuits.
本实施例中，一方面，将夜光模式与红外光模式度关联，使得在光强度比较小的图像采集场景下，通过夜光模式的滤光及红外光模式的补光，能够增强图像补光效果，提高图像质量；另一方面，将日光模式与白光模式度关联，使得在光强度比较大的图像采集场景下，通过日光模式的滤光及白光模式的补光，能够增强图像补光效果，提高图像质量；又一方面，能够使得主控电路10精准控制第一输出端A2输出的第一电压信号的变化，及精准控制第二输出端B2输出的第二电压信号的变化，从而提高滤光模式切换及灯光模式切换的精准度。In this embodiment, on the one hand, the night light mode is associated with the infrared light mode, so that in an image acquisition scenario with relatively low light intensity, the image fill light effect can be enhanced and the image quality can be improved through the light filtering of the night light mode and the fill light of the infrared light mode; on the other hand, the daylight mode is associated with the white light mode, so that in an image acquisition scenario with relatively high light intensity, the image fill light effect can be enhanced and the image quality can be improved through the light filtering of the daylight mode and the fill light of the white light mode; on the other hand, the main control circuit 10 can accurately control the change of the first voltage signal output by the first output terminal A2, and accurately control the change of the second voltage signal output by the second output terminal B2, thereby improving the accuracy of switching the filter mode and the light mode.
在一些实施例中，响应于图像为黑白图像，主控电路10调整第一输出端A2输出的第一电压信号，且保持第二输出端B2的输出第二电压信号不变，以将滤光模式切换为夜光模式及将灯光模式切换为红外光模式；响应于图像为彩色图像，主控电路10调整第二输出端B2输出的第二电压信号，且保持第一输出端A2的输出第一电压信号不变，以将滤光模式切换为日光模式及将灯光模式切换为白光模式。In some embodiments, in response to the image being a black and white image, the main control circuit 10 adjusts the first voltage signal output by the first output terminal A2 and keeps the second voltage signal output by the second output terminal B2 unchanged, so as to switch the light filtering mode to the night light mode and the light mode to the infrared light mode; in response to the image being a color image, the main control circuit 10 adjusts the second voltage signal output by the second output terminal B2 and keeps the first voltage signal output by the first output terminal A2 unchanged, so as to switch the light filtering mode to the daylight mode and the light mode to the white light mode.
在一些实施例中，响应于环境的光强度小于第一阈值，第一输出端A2输出一个第一方波信号A，且第二输出端B2保持输出低电平信号；响应于环境的光强度大于第二阈值，第二输出端B2输出一个第二方波信号B，且第一输出端A2保持输出低电平信号。In some embodiments, in response to the ambient light intensity being less than a first threshold, the first output terminal A2 outputs a first square wave signal A, and the second output terminal B2 continues to output a low level signal; in response to the ambient light intensity being greater than a second threshold, the second output terminal B2 outputs a second square wave signal B, and the first output terminal A2 continues to output a low level signal.
本实施例利用方波信号来实现第一电压信号及第二电压信号的变化，信号简单易产生、控制简单、成本低、精度高，且主控电路10不用持续输出高电平信号，能够节约电路功耗。This embodiment uses a square wave signal to achieve changes in the first voltage signal and the second voltage signal. The signal is simple and easy to generate, simple to control, low cost, and high precision. The main control circuit 10 does not need to continuously output a high-level signal, which can save circuit power consumption.
其它补光场景的实施方式与环境光强场景的实施方式类似，本申请不赘述。The implementation methods of other fill light scenarios are similar to the implementation methods of the ambient light intensity scenario and are not described in detail in this application.
在一些实施例中，第三电压信号包括第一高电平信号A1及第二高电平信号B1，逻辑控制电路30包括：触发电路31，触发电路31设有第一输入端J及第二输入端K，第一输入端J与第一输出端A2电连接，第二输入端K与第二输出端B2电连接，触发电路31还设有与第二驱动电路40电连接的第三输出端Q及第四输出端Q—，触发电路31基于第一方波信号A从第三输出端Q输出第一高电平信号A1，以使第二驱动电路40驱动补光灯组件切换至第一灯光模式；触发电路31基于第二方波信号B从第四输出端Q—输出第二高电平信号B1，以使第二驱动电路40驱动补光灯组件切换至第二灯光模式。In some embodiments, the third voltage signal includes a first high level signal A1 and a second high level signal B1, and the logic control circuit 30 includes: a trigger circuit 31, the trigger circuit 31 is provided with a first input terminal J and a second input terminal K, the first input terminal J is electrically connected to the first output terminal A2, and the second input terminal K is electrically connected to the second output terminal B2, the trigger circuit 31 is also provided with a third output terminal Q and a fourth output terminal Q- electrically connected to the second drive circuit 40, the trigger circuit 31 outputs a first high level signal A1 from the third output terminal Q based on the first square wave signal A, so that the second drive circuit 40 drives the fill light component to switch to the first lighting mode; the trigger circuit 31 outputs a second high level signal B1 from the fourth output terminal Q- based on the second square wave signal B, so that the second drive circuit 40 drives the fill light component to switch to the second lighting mode.
本实施例利用触发电路31将第一方波信号A转换成第一高电平信号A1，且同时保持第二电压信号为低电平信号；利用触发电路31将第二方波信号B转换成第二高电平信号B1，且同时保持第一电压信号为低电平信号。通过这种方式，不仅能够提高逻辑控制电路30对第二驱动电路40控制稳定性，即方波信号的高电平的消失不会导致对第二驱动电路40的控制失效；且能够使得无方波信号的另一个电压信号保持低电平信号，能够提高灯光模式切换的可靠性。In this embodiment, the trigger circuit 31 is used to convert the first square wave signal A into the first high level signal A1, and the second voltage signal is kept as a low level signal at the same time; the trigger circuit 31 is used to convert the second square wave signal B into the second high level signal B1, and the first voltage signal is kept as a low level signal at the same time. In this way, not only the control stability of the second driving circuit 40 by the logic control circuit 30 can be improved, that is, the disappearance of the high level of the square wave signal will not cause the control failure of the second driving circuit 40; but also the other voltage signal without the square wave signal can be kept as a low level signal, which can improve the reliability of the light mode switching.
在一些实施例中，触发电路31包括JK触发器，JK触发器的第一输入端J与第一输出端A2电连接，第二输入端K与第二输出端B2电连接，第三输出端Q及第四输出端Q—均与第二驱动电路40电连接。In some embodiments, the trigger circuit 31 includes a JK trigger, the first input terminal J of the JK trigger is electrically connected to the first output terminal A2, the second input terminal K is electrically connected to the second output terminal B2, and the third output terminal Q and the fourth output terminal Q_ are both electrically connected to the second drive circuit 40.
其中，JK触发器具有置0、置1、保持和翻转功能。在各类集成触发器中，JK触发器的功能最为齐全。在实际应用中，它不仅有很强的通用性，而且能灵活地转换其他类型的触发器。JK触发器的真值表如下：Among them, the JK flip-flop has the functions of set 0, set 1, hold and flip. Among all kinds of integrated flip-flops, the JK flip-flop has the most complete functions. In practical applications, it is not only highly versatile, but also can flexibly convert other types of flip-flops. The truth table of the JK flip-flop is as follows:
表1JK触发器的真值表Table 1 Truth table of JK flip-flop
当第一输入端J输入的第一电压信号为低电平信号及第二输入端K输入的第二电压信号为低电信号平时，第三输出端Q输出低电平信号及第四输出端Q—输出高电平信号，使得第二驱动电路40驱动补光灯组件处于白光模式，可以将这种模式设置为默认模式；当第二输入端K输入第二方波信号B，即高电平信号，且第二输入端J输入的第一电压信号保持低电平信号时，第三输出端Q输出低电平信号及第四输出端Q—输出高电平信号，使得第二驱动电路40驱动补光灯组件处于白光模式。When the first voltage signal input by the first input terminal J is a low level signal and the second voltage signal input by the second input terminal K is a low level signal, the third output terminal Q outputs a low level signal and the fourth output terminal Q- outputs a high level signal, so that the second drive circuit 40 drives the fill light component to be in white light mode, and this mode can be set as the default mode; when the second input terminal K inputs the second square wave signal B, that is, a high level signal, and the first voltage signal input by the second input terminal J maintains a low level signal, the third output terminal Q outputs a low level signal and the fourth output terminal Q- outputs a high level signal, so that the second drive circuit 40 drives the fill light component to be in white light mode.
本实施例通过JK触发器不仅能够实现补光灯组件的红外光模式及白光模式的切换，还能够将白光模式设置为默认模式，即第一电压信号及第二电压信号无变化时的灯光模式。This embodiment can not only switch between the infrared light mode and the white light mode of the fill light assembly through the JK trigger, but also set the white light mode to the default mode, that is, the lighting mode when the first voltage signal and the second voltage signal do not change.
在其它实施例中，还可以采用其它触发电路，例如RS触发器、D触发器、T触发器等，可以配合调整上述第一电压信号及第二电压信号来达到上述实施例的作用。In other embodiments, other trigger circuits, such as RS trigger, D trigger, T trigger, etc., may be used to cooperate with adjusting the first voltage signal and the second voltage signal to achieve the effect of the above embodiment.
在一些实施例中，逻辑控制电路30还包括：延时电路32，分别与第一输出端A2、第二输出端B2及触发电路31的时钟端CLK电连接，延时电路32将第一方波信号A或第二方波信号B延时处理后作为时钟信号供给触发电路31。In some embodiments, the logic control circuit 30 also includes: a delay circuit 32, which is electrically connected to the first output terminal A2, the second output terminal B2 and the clock terminal CLK of the trigger circuit 31 respectively. The delay circuit 32 delays the first square wave signal A or the second square wave signal B and supplies it to the trigger circuit 31 as a clock signal.
本实施例利用延时电路32能够得到方波信号的时延信号，将该延时信号作为触发电路31的时钟信号，以使得触发电路31输出的第一高电平信号A1延迟于第一方波信号A，使得触发电路31输出的第二高电平信号B1延迟于第二方波信号B（这里的延迟是指高电平信号的上升沿时刻）。In this embodiment, the delay circuit 32 is used to obtain a time-delay signal of the square wave signal, and the delay signal is used as the clock signal of the trigger circuit 31, so that the first high-level signal A1 output by the trigger circuit 31 is delayed compared to the first square wave signal A, and the second high-level signal B1 output by the trigger circuit 31 is delayed compared to the second square wave signal B (the delay here refers to the rising edge moment of the high-level signal).
通过这种方式，一方面，本实施例无需额外时钟源，通过第一方波信号A或第二方波信号B就能产生时钟信号，结构简单、成本低，且对第二驱动电路40的控制精准度高；另一方面，能够提高触发电路31在一个时钟信号的上升沿到来时成功触发产生第一高电平信号A1或第二高电平信号B1，不需要额外的上升沿；相较于常规的周期性时钟信号，本申请仅根据前端电路输出的一个方波产生一个时钟信号，在需要切换时才触发产生高电平信号，控制精准度更高。In this way, on the one hand, this embodiment does not require an additional clock source, and can generate a clock signal through the first square wave signal A or the second square wave signal B, with a simple structure, low cost, and high control accuracy for the second drive circuit 40; on the other hand, it can improve the ability of the trigger circuit 31 to successfully trigger the generation of the first high-level signal A1 or the second high-level signal B1 when a rising edge of a clock signal arrives, without the need for an additional rising edge; compared to conventional periodic clock signals, the present application only generates a clock signal based on a square wave output by the front-end circuit, and triggers the generation of a high-level signal only when switching is required, with higher control accuracy.
其它实施例中，还可以直接根据上述方波信号来获得时钟信号或者直接输入时钟信号，可以节约延迟电路。In other embodiments, the clock signal may be directly obtained according to the square wave signal or directly input, thereby saving the delay circuit.
在一些实施例中，延时电路32包括：异或门。异或门的两个输入端分别与第一输出端A2、第二输出端B2电连接，异或门的输出端与触发电路31的时钟端CLK电连接。其中，异或门的两个输入端输入不同时，其输出端输出高电平信号，两个输出端输入相同时，其输出端输出低电平信号。In some embodiments, the delay circuit 32 includes an XOR gate. The two input terminals of the XOR gate are electrically connected to the first output terminal A2 and the second output terminal B2 respectively, and the output terminal of the XOR gate is electrically connected to the clock terminal CLK of the trigger circuit 31. When the two input terminals of the XOR gate are different, its output terminal outputs a high level signal, and when the two output terminals are the same, its output terminal outputs a low level signal.
本实施例通过异或门不仅能够产生延时的时钟信号，二者能够基于第一电压信号及第二电压信号中的一者变化时产生对应的时钟信号。In this embodiment, not only can a delayed clock signal be generated through the XOR gate, but also a corresponding clock signal can be generated based on a change in one of the first voltage signal and the second voltage signal.
其它实施例，可以采用其它逻辑门电路实现上述异或门实现的功能，或者采用其它组合的逻辑门电路及触发电路实现上述实施例的功能。In other embodiments, other logic gate circuits may be used to implement the functions implemented by the above-mentioned XOR gate, or other combinations of logic gate circuits and trigger circuits may be used to implement the functions of the above-mentioned embodiments.
在一些实施例中，逻辑控制电路30还包括：开关电路33，开关电路33的控制端与延时电路32电连接，开关电路33的第一通信端与主控电路10的控制端C电连接，开关电路33的第二通信端与第二驱动电路40电连接；其中，开关电路33在时钟信号的上升沿关断，以关断主控电路10的调制信号对第二驱动电路40的输出，开关电路33在时钟信号的下降沿导通，以恢复主控电路10对第二驱动电路40的调制信号的输出。In some embodiments, the logic control circuit 30 also includes: a switching circuit 33, wherein the control end of the switching circuit 33 is electrically connected to the delay circuit 32, the first communication end of the switching circuit 33 is electrically connected to the control end C of the main control circuit 10, and the second communication end of the switching circuit 33 is electrically connected to the second drive circuit 40; wherein the switching circuit 33 is turned off at the rising edge of the clock signal to turn off the output of the modulation signal of the main control circuit 10 to the second drive circuit 40, and the switching circuit 33 is turned on at the falling edge of the clock signal to restore the output of the modulation signal of the main control circuit 10 to the second drive circuit 40.
具体地，开关电路33的控制端与延时电路32的输出端（如异或门的输出端）电连接。Specifically, the control end of the switch circuit 33 is electrically connected to the output end of the delay circuit 32 (such as the output end of the XOR gate).
本实施例的主控电路10的控制端C还可以与第二驱动电路40电连接，在至少一个上述灯光模式下，主控电路10控制第二驱动电路40调整各个灯光模式的灯光强度，以提高补光效果，提升图像的质量。The control terminal C of the main control circuit 10 of this embodiment can also be electrically connected to the second drive circuit 40. In at least one of the above-mentioned lighting modes, the main control circuit 10 controls the second drive circuit 40 to adjust the light intensity of each lighting mode to improve the fill light effect and enhance the image quality.
其中，调制信号可以包括脉宽调制（Pulse Width Modulation，PWM）信号，通过调整PWM信号的占空比来调整补光灯的光强度。The modulation signal may include a pulse width modulation (PWM) signal, and the light intensity of the fill light is adjusted by adjusting the duty cycle of the PWM signal.
本实施例通过开关电路33通断主控电路10与第二驱动电路40之间的电连接，且能够通过开关电路33在时钟信号的上升沿关断主控电路10的调制信号对第二驱动电路40的输出，在时钟信号的下降沿恢复对主控电路10对第二驱动电路40的调制信号的输出。通过这种方式，能够在灯光模式切换过程中，不给第二驱动电路40输出调制信号，在切换完成后，才给第二驱动电路40输出调制信号，能够节约功耗，且能够降低第二驱动电路40中用于控制不同灯光模式的开关管同时导通的概率，从而能够降低开关管的瞬态电流，提高电路的可靠性。In this embodiment, the switch circuit 33 is used to open and close the electrical connection between the main control circuit 10 and the second drive circuit 40, and the switch circuit 33 can shut down the output of the modulation signal of the main control circuit 10 to the second drive circuit 40 at the rising edge of the clock signal, and restore the output of the modulation signal of the main control circuit 10 to the second drive circuit 40 at the falling edge of the clock signal. In this way, during the light mode switching process, the modulation signal can be output to the second drive circuit 40 without outputting the modulation signal, and the modulation signal can be output to the second drive circuit 40 after the switching is completed, which can save power consumption and reduce the probability of the switch tubes used to control different light modes in the second drive circuit 40 being turned on at the same time, thereby reducing the transient current of the switch tube and improving the reliability of the circuit.
在其它实施例中，第二驱动电路还可以直接与主控电路电连接，以主控电路的控制下控制第二驱动电路调整各个灯光模式的补光光强度。In other embodiments, the second driving circuit may also be directly electrically connected to the main control circuit, so that the second driving circuit is controlled by the main control circuit to adjust the fill light intensity of each lighting mode.
在一些实施例中，开关电路33包括三态门，三态门的输入端与主控电路10电连接，三态门的输出端与第二驱动电路40电连接，三态门的控制端接入时钟信号，且三态门低电平导通，高电平截止。In some embodiments, the switch circuit 33 includes a three-state gate, the input end of the three-state gate is electrically connected to the main control circuit 10, the output end of the three-state gate is electrically connected to the second drive circuit 40, the control end of the three-state gate is connected to the clock signal, and the three-state gate is turned on at a low level and cut off at a high level.
在一应用场景中，如图2及图3所示，JK触发器在时钟信号（时钟端CLK输出的信号）的上升沿到来时将第一方波信号A信号转换成从第三输出端Q输出的相较于第一方波信号A延迟的高电平信号，第四输出端Q—保持低电平信号；同时时钟信号的高电平控制三态门断开，从而使得三态门输出的PWM1停止输出给第二驱动电路40。In an application scenario, as shown in Figures 2 and 3, the JK trigger converts the first square wave signal A into a high-level signal delayed compared to the first square wave signal A and output from the third output terminal Q when the rising edge of the clock signal (the signal output by the clock terminal CLK) arrives, and the fourth output terminal Q—maintains a low-level signal; at the same time, the high level of the clock signal controls the three-state gate to disconnect, so that the PWM1 output by the three-state gate stops being output to the second drive circuit 40.
在一应用场景中，如图2及图4所示，JK触发器在时钟信号（时钟端CLK输出的信号）的上升沿到来时将第二方波信号B信号转换成从第四输出端Q—输出的相较于第二方波信号B延迟的高电平信号，第三输出端Q保持低电平信号；同时时钟信号的高电平控制三态门断开，从而使得三态门输出的PWM1停止输出给第二驱动电路40。In an application scenario, as shown in Figures 2 and 4, the JK trigger converts the second square wave signal B into a high-level signal delayed compared to the second square wave signal B and output from the fourth output terminal Q- when the rising edge of the clock signal (the signal output by the clock terminal CLK) arrives, and the third output terminal Q maintains a low-level signal; at the same time, the high level of the clock signal controls the three-state gate to disconnect, so that the PWM1 output by the three-state gate stops being output to the second drive circuit 40.
其中，图3及图4中，JK触发器的各个端口的信号利用其对应的端口标号来对应标识。In FIG. 3 and FIG. 4 , the signals of the various ports of the JK flip-flop are identified by their corresponding port numbers.
在一些实施例中，如图5所示，补光灯组件包括白补光灯及红外补光灯；第二驱动电路40包括：驱动芯片、第一开关管Q1及第二开关管Q2；驱动芯片41与主控电路10的控制端C、白补光灯及红外补光灯电连接；第一开关管Q1的控制端与逻辑控制电路30电连接，第一开关管Q1的第一通信端与白补光灯电连接，第一开关管Q1的第二通信端与驱动芯片41电连接；第二开关管Q2的控制端与逻辑控制电路30电连接，第二开关管Q2的第一通信端与红外补光灯电连接，第二开关管Q2的第二通信端与驱动芯片41电连接PWM1。In some embodiments, as shown in Figure 5, the fill light assembly includes a white fill light and an infrared fill light; the second driving circuit 40 includes: a driving chip, a first switch tube Q1 and a second switch tube Q2; the driving chip 41 is electrically connected to the control end C of the main control circuit 10, the white fill light and the infrared fill light; the control end of the first switch tube Q1 is electrically connected to the logic control circuit 30, the first communication end of the first switch tube Q1 is electrically connected to the white fill light, and the second communication end of the first switch tube Q1 is electrically connected to the driving chip 41; the control end of the second switch tube Q2 is electrically connected to the logic control circuit 30, the first communication end of the second switch tube Q2 is electrically connected to the infrared fill light, and the second communication end of the second switch tube Q2 is electrically connected to the driving chip 41 PWM1.
具体地，第一开关管Q1的控制端与逻辑控制电路30中第三输出端Q电连接，第二开关管Q2的控制端与逻辑控制电路30中第四输出端Q—电连接。Specifically, the control end of the first switch tube Q1 is electrically connected to the third output end Q in the logic control circuit 30 , and the control end of the second switch tube Q2 is electrically connected to the fourth output end Q— in the logic control circuit 30 .
其中，红外补光灯可以包括红外LED灯，白补光灯可以包括白光LED灯。驱动芯片41的供电端VCC用于接入供电信号；驱动芯片41的输出端LX通过线圈与红外补光灯及白补光灯连接；驱动芯片41的反馈端FB与第一开关管Q1的第二通信端及第二开关管Q2的第二通信端连接。The infrared fill light may include an infrared LED lamp, and the white fill light may include a white LED lamp. The power supply terminal VCC of the driver chip 41 is used to access the power supply signal; the output terminal LX of the driver chip 41 is connected to the infrared fill light and the white fill light through a coil; the feedback terminal FB of the driver chip 41 is connected to the second communication terminal of the first switch tube Q1 and the second communication terminal of the second switch tube Q2.
第二驱动电路40其通过逻辑控制电路30输出的电平，控制补光灯链路的导通和关闭，实现补光灯的切换。具体地，由驱动芯片和两个MOS管（第一开关管Q1及第二开关管Q2）组成，通过第一高电平信号A1和第二高电平信号B1的状态来控制两个MOS的导通和关断，实现用一路驱动做补光状态的切换，能够改善两个MOS同时打开的问题，关断可以跟滤光片组件的切换状态来切换对应的补光灯，能够改善由于程序错误造成的补光灯切换逻辑异常使得其和滤光片不对应的问题，并且逻辑控制电路30输入是高阻抗，其不会影响滤光片组件的切换；驱动芯片的DIM管脚其主要根据PWM1信号的占空比来控制导通电流的大小，DIM管脚通过PWM1信号控制，PWM1信号根据三态门在补光灯切换时使其断开，以使驱动芯片处于无电流输出状态，当滤光片切换完成，三态门保持导通状态是补光灯亮起。The second driving circuit 40 controls the conduction and shutdown of the fill light link through the level output by the logic control circuit 30 to realize the switching of the fill light. Specifically, it is composed of a driving chip and two MOS tubes (a first switch tube Q1 and a second switch tube Q2). The conduction and shutdown of the two MOS are controlled by the state of the first high-level signal A1 and the second high-level signal B1, so as to realize the switching of the fill light state with one driving, which can improve the problem of two MOS being turned on at the same time. The shutdown can switch the corresponding fill light with the switching state of the filter component, which can improve the problem that the fill light switching logic is abnormal due to program errors and does not correspond to the filter. The input of the logic control circuit 30 is high impedance, which will not affect the switching of the filter component. The DIM pin of the driving chip mainly controls the size of the conduction current according to the duty cycle of the PWM1 signal. The DIM pin is controlled by the PWM1 signal. The PWM1 signal disconnects the three-state gate when the fill light is switched, so that the driving chip is in a state of no current output. When the filter switching is completed, the three-state gate remains in the conducting state and the fill light is on.
在一些实施例中，第一驱动电路20包括H桥电路，其可以根据第一输出端A2和第二输出端B2的状态来切换滤光片。In some embodiments, the first driving circuit 20 includes an H-bridge circuit, which can switch the filter according to the states of the first output terminal A2 and the second output terminal B2.
在一些实施例中，响应于上电，主控电路10控制滤光片组件处于白光模式，并控制第二驱动电路40不工作；响应于上电结束，主控电路10基于补光需求确定是否需要切换滤光片组件；响应于需要切换滤光片组件，主控电路10控制滤光片组件切换至夜光模式，并控制补光灯组件切换至红外光模式；响应于不需要切换滤光片组件，主控电路10控制补光灯组件切换至红外光模式。In some embodiments, in response to power-on, the main control circuit 10 controls the filter assembly to be in white light mode, and controls the second drive circuit 40 to not work; in response to the end of power-on, the main control circuit 10 determines whether it is necessary to switch the filter assembly based on the fill light requirement; in response to the need to switch the filter assembly, the main control circuit 10 controls the filter assembly to switch to night light mode, and controls the fill light assembly to switch to infrared light mode; in response to the need not to switch the filter assembly, the main control circuit 10 controls the fill light assembly to switch to infrared light mode.
设备上电启动默认进入白光模式，第一输出端A2和第二输出端B2的输出信号保持低电平，以保持第一驱动电路20不输出；第二驱动电路可以根据PWM1信号的占空比或者电压保持在不打开状态；当图像或者光敏检测到环境亮度低于一定值时，第一输出端A2输出一个方波，且第二输出端B2为低电平，第一驱动电路20会输出正向的方波使ICR线圈正向导通切换夜光片；当环境亮度由低变高且高于预设值时，第一输出端A2为低电平，且第二输出端B2输出一个方波，第一驱动电路20会输出反向的方波使ICR线圈反向导通切换日光片。When the device is powered on and started, it enters the white light mode by default. The output signals of the first output terminal A2 and the second output terminal B2 remain at a low level to keep the first drive circuit 20 from outputting. The second drive circuit can remain in a non-open state according to the duty cycle or voltage of the PWM1 signal. When the image or photosensitive detection detects that the ambient brightness is lower than a certain value, the first output terminal A2 outputs a square wave, and the second output terminal B2 is at a low level. The first drive circuit 20 will output a positive square wave to make the ICR coil forwardly conductive and switch the luminous film. When the ambient brightness changes from low to high and is higher than the preset value, the first output terminal A2 is at a low level, and the second output terminal B2 outputs a square wave. The first drive circuit 20 will output a reverse square wave to make the ICR coil reversely conductive and switch the daylight film.
在一些实施例中，如图6所示，首先设备开始上电，通用摄像机会默认白光模式，即彩色模式，此时滤光片会保持日光片或者切换到日光模式，第二驱动电路40根据PWM1的占空比或者电压保持在不打开状态，等设备上电完后根据图像、光敏来判断是否切换滤光片，若需要切换滤光片则控制第一输出端A2及第二输出端B2输出的电压信号来切换滤光片的状态，同时逻辑控制电路30根据第一输出端A2及第二输出端B2输出的电压信号来切换对应灯光模式，后续根据图像等调整PWM1的占空比或者电压来调节补光灯的亮度；若不需要切换滤光片，由于上电默认是彩色模式，第一输出端A2及第二输出端B2输出的电压信号上电状态均为低电平，逻辑控制电路30上电后第三输出端Q输出由下拉电阻默认为低电平，根据上述真值状态表，状态保持默认，补光灯状态默认为白光状态，再根据图像等调整PWM1的占空比或者电压来调节补光灯的亮度；另外一种方式是手动设置状态，其根据用于自己设置的图像模式和补光灯的亮度来进行控制，其控制逻辑与上述图像或者光敏控制类似。In some embodiments, as shown in FIG6 , the device is first powered on, and the universal camera will default to the white light mode, i.e., the color mode. At this time, the filter will remain in the daylight mode or switch to the daylight mode. The second drive circuit 40 remains in a non-open state according to the duty cycle or voltage of PWM1. After the device is powered on, it is determined whether to switch the filter according to the image and photosensitivity. If the filter needs to be switched, the voltage signal output by the first output terminal A2 and the second output terminal B2 is controlled to switch the state of the filter. At the same time, the logic control circuit 30 switches the corresponding light mode according to the voltage signal output by the first output terminal A2 and the second output terminal B2. The duty cycle of PWM1 is adjusted according to the image, etc. The brightness of the fill light is adjusted by the duty cycle or voltage of PWM1; if there is no need to switch the filter, since the power-on default is the color mode, the power-on states of the voltage signals output by the first output terminal A2 and the second output terminal B2 are both low level, and after the logic control circuit 30 is powered on, the output of the third output terminal Q is defaulted to a low level by the pull-down resistor. According to the above truth state table, the state remains default, and the fill light state is defaulted to the white light state, and then the duty cycle or voltage of PWM1 is adjusted according to the image, etc. to adjust the brightness of the fill light; another way is to manually set the state, which is controlled according to the image mode set by itself and the brightness of the fill light, and its control logic is similar to the above image or light-sensitive control.
其中，驱动芯片可以是恒压式驱动芯片、恒流式驱动芯片以及脉冲式驱动芯片等。其中恒压式驱动芯片可以包括DC/DC升压芯片等。The driving chip may be a constant voltage driving chip, a constant current driving chip, a pulse driving chip, etc. The constant voltage driving chip may include a DC/DC boost chip, etc.
本申请进一步提出一种图像采集设备，包括补光控制电路、摄像机本体、滤光片组件及补光灯组件，补光控制电路利用上述实施例描述的控制方法控制滤光片组件及补光灯组件工作，具体可以参阅上述实施例。The present application further proposes an image acquisition device, including a fill light control circuit, a camera body, a filter assembly and a fill light assembly. The fill light control circuit uses the control method described in the above embodiment to control the operation of the filter assembly and the fill light assembly. For details, please refer to the above embodiment.
本申请的主控电路基于补光需求选择性调整其第一输出端输出的第一电压信号或第二输出端输出的第二电压信号，第一驱动电路基于调整后的第一电压信号驱动滤光片组件切换至第一滤光模式，或者基于调整后的第二电压信号驱动滤光片组件切换至第二滤光模式；同时，逻辑控制电路基于调整后的第一电压信号控制第二驱动电路驱动补光等组件切换至于第一滤光模式对应的第一灯光模式，或者基于调整后的第二电压信号控制第二驱动电路驱动补光等组件切换至于第二滤光模式对应的第二灯光模式。通过这种方式，控制第一驱动电路驱动滤光片组件切换滤光模式的信号与控制第二驱动电路驱动补光灯组件切换灯光模式的信号为同一端口输出的同一信号，能够实现滤光模式切换与灯光模式切换的关联及同步，且硬件成本低；且第一输出信号的变化与第一滤光模式及第一灯光模式关联，第二输出信号的变化与第二灯光模式及第二灯光模式关联，能够提高滤光模式与对应的灯光模式之间的关联的精准度；因此，本申请能够提高滤光模式切换与灯光模式切换之间的关联，使得二者的切换对应，从而能够提高补光效果及图像质量。The main control circuit of the present application selectively adjusts the first voltage signal outputted from the first output terminal or the second voltage signal outputted from the second output terminal based on the fill light demand, and the first driving circuit drives the filter component to switch to the first filtering mode based on the adjusted first voltage signal, or drives the filter component to switch to the second filtering mode based on the adjusted second voltage signal; at the same time, the logic control circuit controls the second driving circuit to drive the fill light and other components to switch to the first lighting mode corresponding to the first filtering mode based on the adjusted first voltage signal, or controls the second driving circuit to drive the fill light and other components to switch to the second lighting mode corresponding to the second filtering mode based on the adjusted second voltage signal. In this way, the signal that controls the first driving circuit to drive the filter component to switch the filter mode and the signal that controls the second driving circuit to drive the fill light component to switch the lighting mode are the same signal output from the same port, which can realize the association and synchronization of the filter mode switching and the lighting mode switching, and the hardware cost is low; and the change of the first output signal is associated with the first filter mode and the first lighting mode, and the change of the second output signal is associated with the second lighting mode and the second lighting mode, which can improve the accuracy of the association between the filter mode and the corresponding lighting mode; therefore, the present application can improve the association between the filter mode switching and the lighting mode switching, so that the switching of the two corresponds, thereby improving the fill light effect and image quality.
进一步地，通过滤光片切换和补光灯切换相结合能够改善由于程序错误造成的补光灯切换逻辑异常使得其和滤光片不对应的问题；通过逻辑控制电路实现控制滤光片的同时对补光灯状态进行切换不仅可以减少一路驱动，同时控制调制信号导通和关断使其保持在开关管切换时驱动无输出状态，防止切换瞬态电流高，也可以减少一路调制信号传输管脚的资源，极大的减少设备成本和资源的利用；可以有效减少电路板的面积，同时也能够减少主板和灯板搭配时连接器的PIN数量，有效的减少设备成本。Furthermore, by combining filter switching with fill light switching, the problem of fill light switching logic abnormality caused by program errors that makes it inconsistent with the filter can be improved; by controlling the filter through a logic control circuit and switching the fill light state at the same time, not only can one drive be reduced, but also the modulation signal can be controlled to be turned on and off to keep it in a no-output state when the switch tube is switched, thereby preventing high transient current from switching, and also reducing the resources of one modulation signal transmission pin, greatly reducing equipment cost and resource utilization; it can effectively reduce the area of the circuit board, and at the same time can also reduce the number of connector PINs when the main board and the light board are matched, effectively reducing equipment cost.
若本申请技术方案涉及个人信息，应用本申请技术方案的产品在处理个人信息前，已明确告知个人信息处理规则，并取得个人自主同意。若本申请技术方案涉及敏感个人信息，应用本申请技术方案的产品在处理敏感个人信息前，已取得个人单独同意，并且同时满足“明示同意”的要求。例如，在摄像头等个人信息采集装置处，设置明确显著的标识告知已进入个人信息采集范围，将会对个人信息进行采集，若个人自愿进入采集范围即视为同意对其个人信息进行采集；或者在个人信息处理的装置上，利用明显的标识/信息告知个人信息处理规则的情况下，通过弹窗信息或请个人自行上传其个人信息等方式获得个人授权；其中，个人信息处理规则可包括个人信息处理者、个人信息处理目的、处理方式以及处理的个人信息种类等信息。If the technical solution of this application involves personal information, the product using the technical solution of this application has clearly informed the personal information processing rules and obtained the individual's voluntary consent before processing the personal information. If the technical solution of this application involves sensitive personal information, the product using the technical solution of this application has obtained the individual's separate consent before processing the sensitive personal information, and at the same time meets the "explicit consent" requirement. For example, on personal information collection devices such as cameras, clear and prominent signs are set to inform that the personal information collection scope has been entered and personal information will be collected. If the individual voluntarily enters the collection scope, it is deemed that he or she agrees to the collection of his or her personal information; or on the device that processes personal information, the personal information processing rules are notified by obvious signs/information, and the individual's authorization is obtained through pop-up information or by asking the individual to upload his or her personal information; among them, the personal information processing rules may include information such as the personal information processor, the purpose of personal information processing, the processing method, and the type of personal information processed.
以上所述仅为本申请的实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
| Application Number | Priority Date | Filing Date | Title |
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| CN202411402405.8ACN118921565B (en) | 2024-10-09 | 2024-10-09 | Fill light control circuit and image acquisition equipment |
| Application Number | Priority Date | Filing Date | Title |
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| CN202411402405.8ACN118921565B (en) | 2024-10-09 | 2024-10-09 | Fill light control circuit and image acquisition equipment |
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| CN118921565B CN118921565B (en) | 2025-01-24 |
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| CN202411402405.8AActiveCN118921565B (en) | 2024-10-09 | 2024-10-09 | Fill light control circuit and image acquisition equipment |
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