Environment-friendly light supplementing structure and camera device with environment-friendly light supplementing function

Abstract

The utility model belongs to the technical field of camera devices, and discloses an environment-friendly light supplement structure and a camera device with environment-friendly light supplement. The environment-friendly light supplementing structure comprises a switching circuit, a time delay circuit, a dimming switching circuit and a light supplementing unit, the image sensor is respectively connected with the ISP chip and the switching circuit, the image sensor outputs a frame synchronizing signal to the switching circuit, the image sensor outputs an image signal to the ISP chip, the input end of the dimming switching circuit is connected with the ISP chip and receives a PWM signal output by the ISP chip, the output end of the dimming switching circuit is connected with the light supplementing unit, and the light supplementing unit is connected with the switching circuit. The output end of the switching circuit is connected with the input end of the time delay circuit, and the output end of the time delay circuit is connected with the light supplementing unit. On the premise of ensuring the image quality of the camera device, the power consumption of the light supplementing unit is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of camera devices, and particularly relates to an environment-friendly supplementary lighting structure and a camera device with environment-friendly supplementary lighting. Background Technique

[0002] In the field of camera devices, such as cameras, in order to capture images in low-light scenes, it is usually adopted to configure a supplementary lighting unit, generally infrared lamp supplementary lighting or white lamp supplementary lighting. In order to obtain higher image quality, the power consumption of the supplementary lighting unit is relatively large, and the supplementary lighting unit needs to be constantly on during the whole shooting process. Therefore, the power supply requirement for the camera device is very high, with large power consumption, and it is not suitable for low-power devices. Content of the Utility Model

[0003] One of the purposes of the utility model is to provide an environment-friendly supplementary lighting structure, which reduces the power consumption of the supplementary lighting unit on the premise of ensuring the image quality of the camera device.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] An environment-friendly supplementary lighting structure is applied to a camera device. The camera device has an image sensor and an ISP chip. The environment-friendly supplementary lighting structure includes a switch circuit, a delay circuit, a dimming switch circuit, and a supplementary lighting unit;

[0006] The image sensor is respectively connected to the ISP chip and the switch circuit. The image sensor outputs a frame synchronization signal to the switch circuit, and the image sensor outputs an image signal to the ISP chip. The input end of the dimming switch circuit is connected to the ISP chip to receive the PWM signal output by the ISP chip. The output end of the dimming switch circuit is connected to the supplementary lighting unit. The output end of the switch circuit is connected to the input end of the delay circuit, and the output end of the delay circuit is connected to the supplementary lighting unit.

[0007] Preferably, the supplementary lighting unit includes an LED driving module and a supplementary lighting lamp. The output end of the dimming switch circuit is connected to the input end of the LED driving module. The output end of the delay circuit is connected to the input end of the LED driving module. The output end of the LED driving module is connected to the supplementary lighting lamp.

[0008] The environment-friendly supplementary lighting structure provided by the utility model realizes the cooperation between the supplementary lighting lamp and the video frames based on hardware, realizes the control of light intensity (dimming), and the switch of supplementary lighting, can reduce the power consumption of the supplementary lighting unit by 20 - 30%, realizes the environment-friendly supplementary lighting operation, and greatly reduces the power requirement for the camera device.

[0009] The second object of the present utility model is to provide a camera device with environmental protection supplementary lighting, which can ensure the quality of the captured images and has low power consumption for supplementary lighting.

[0010] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0011] A camera device with environmental protection supplementary lighting, the camera device with environmental protection supplementary lighting includes an image sensor, an ISP chip and an environmental protection supplementary lighting structure, and the environmental protection supplementary lighting structure includes a switch circuit, a delay circuit, a dimming switch circuit and a supplementary lighting unit;

[0012] The image sensor is respectively connected to the ISP chip and the switch circuit. The image sensor outputs a frame synchronization signal to the switch circuit, and the image sensor outputs an image signal to the ISP chip. The input end of the dimming switch circuit is connected to the ISP chip to receive the PWM signal output by the ISP chip. The output end of the dimming switch circuit is connected to the supplementary lighting unit. The output end of the switch circuit is connected to the input end of the delay circuit, and the output end of the delay circuit is connected to the supplementary lighting unit.

[0013] Preferably, the supplementary lighting unit includes an LED driving module and a supplementary light lamp. The output end of the dimming switch circuit is connected to the input end of the LED driving module, the output end of the delay circuit is connected to the input end of the LED driving module, and the output end of the LED driving module is connected to the supplementary light lamp.

[0014] The camera device with environmental protection supplementary lighting provided by the present utility model realizes the cooperation between the supplementary light lamp and the video frame number based on hardware, realizes the control of the light intensity (dimming), and the switch of the supplementary lighting can reduce the power consumption of the supplementary lighting unit by 20-30%, realizes the environmental protection supplementary lighting operation, and greatly reduces the power requirement for the camera device. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of an environmental protection supplementary lighting structure of the present utility model;

[0016] Figure 2 It is a schematic diagram of an embodiment of the switch circuit of the present utility model;

[0017] Figure 3 It is a schematic diagram of another embodiment of the switch circuit of the present utility model;

[0018] Figure 4 It is a schematic diagram of an embodiment of the delay circuit of the present utility model;

[0019] Figure 5 It is a schematic diagram of another embodiment of the delay circuit of the present utility model;

[0020] Figure 6 Schematic diagram of an embodiment of the dimming switch circuit of the present utility model;

[0021] Figure 7 Schematic diagram of a specific structure of the environmental protection supplementary lighting structure of the present utility model. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can also be an intermediate component; when a component is referred to as being "fixed" to another component, it can be directly fixed to the other component or there can also be an intermediate component.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0025] Embodiment 1

[0026] This embodiment provides an environmental protection supplementary lighting structure, which is applied to a camera device. The camera device in this embodiment refers to devices and systems used to capture and record video images, which can be cameras, webcams or action cameras, etc. The camera device is a conventional existing structure and is not limited in this embodiment. The environmental protection supplementary lighting structure in this embodiment only requires that the camera device has an image sensor and an ISP chip (Image Signal Processor).

[0027] As Figure 1 shown, the environmental protection supplementary lighting structure of this embodiment includes a switch circuit, a delay circuit, a dimming switch circuit and a supplementary lighting unit. The image sensor is respectively connected to the ISP chip and the switch circuit. The image sensor outputs a frame synchronization signal to the switch circuit, and the image sensor outputs an image signal to the ISP chip. The input end of the dimming switch circuit is connected to the ISP chip to receive the PWM signal output by the ISP chip. The output end of the dimming switch circuit is connected to the supplementary lighting unit. The output end of the switch circuit is connected to the input end of the delay circuit, and the output end of the delay circuit is connected to the supplementary lighting unit.

[0028] Image sensor: In this embodiment, the image sensor outputs an image signal to the ISP chip and simultaneously outputs a frame synchronization signal to control the switching circuit. The video stream of the imaging device is composed of many frames of images. For example, the description of the video stream has 20 frames, 30 frames, etc., which means that there are 20 frames of images, 30 frames of images, etc. in the video stream of 1 s. The acquisition of each frame of image has an exposure time, and there is a certain time interval between every two frames of images or adjacent two exposures. At this time, a frame synchronization signal will be output as an indication of the exposure interval.

[0029] Switching circuit: The switching circuit outputs an enable signal for the control of the next stage. The reason for the existence of the switching circuit is that the amplitude and intensity of the frame synchronization signal are uncertain. Therefore, it is necessary for the switching circuit to condition the frame synchronization signal and output a signal with control ability (sufficient level value and drive current). The switching circuit in this embodiment can use a conventional switching circuit. For example, Figure 2 the level conversion circuit shown, or Figure 3 the inverter circuit shown. The level conversion circuit includes a diode and a resistor. The negative electrode of the diode is used as the Vin terminal to receive the frame synchronization signal output by the image sensor. The positive electrode of the diode is connected to VCC through a resistor (for example, 1.8 V, and the amplitude of the frame synchronization signal is higher than VCC). At the same time, the positive electrode of the diode is used as the Vout terminal and is connected to the input terminal of the delay circuit. The inverter circuit includes a MOS transistor and a resistor. The MOS transistor is an N-channel MOS transistor. The gate of the MOS transistor is used as the Vin terminal to receive the frame synchronization signal output by the image sensor. The source of the MOS transistor is grounded. The drain of the MOS transistor is connected to VCC through a resistor. At the same time, the drain of the MOS transistor is used as the Vout terminal and is connected to the input terminal of the delay circuit.

[0030] Delay circuit: Since using only the frame synchronization signal for automatic opening and closing may generate dead zones, a delay circuit is introduced in this embodiment to stretch the enable signal in the time domain (including four operations: leading, delaying, shortening bidirectionally, and extending bidirectionally). The enable signal output by the delay circuit will directly control the light supplement unit to perform the opening and closing operations. The delay circuit needs to be adjusted according to the specific circuit design. The delay circuit in this embodiment can use a conventional delay circuit. For example, Figure 4 the leading circuit shown, with both ends of the capacitor used as the Vin terminal and the Vout terminal respectively. The Vin terminal is connected to the output terminal of the switching circuit, and the Vout terminal is connected to the light supplement unit. One end of the resistor is connected to the Vout terminal of the capacitor, and the other end is grounded. Or Figure 5 the delay circuit shown, with both ends of the resistor used as the Vin terminal and the Vout terminal respectively. The Vin terminal is connected to the output terminal of the switching circuit, and the Vout terminal is connected to the light supplement unit. One end of the capacitor is connected to the Vout terminal of the resistor, and the other end is grounded.

[0031] ISP chip: After receiving the image signal, the ISP chip will output a PWM signal to control the dimming switch circuit. In this embodiment, the ISP chip is a conventional chip, and the output of the PWM signal is completed by its own function, which will not be elaborated in this embodiment.

[0032] Dimming switch circuit: The dimming switch circuit receives the PWM signal output by the ISP chip and outputs a power output signal with a variable voltage, that is, the dimming operation of the LED is realized. This embodiment provides a basic dimming switch circuit as Figure 6 shown, including a MOS transistor, a resistor and a capacitor. The MOS transistor is a P-channel MOS transistor. The gate of the MOS transistor receives the PWM signal output by the ISP chip. The source of the MOS transistor serves as the Vin terminal to receive the input power signal, generally 5V or above. The drain of the MOS transistor is connected to the resistor, and the other end of the resistor serves as the Vout terminal to be connected to the fill light unit. One end of the capacitor is grounded, and the other end is connected to the Vout terminal of the resistor. This embodiment uses a PWM pulse width dimming circuit as the dimming switch circuit, Figure 6 which is only a feasible solution, and other circuit structures with the same function can also be used in specific implementations.

[0033] Fill light unit: As Figure 7 shown, the fill light unit includes an LED driving module and a fill light. The output end of the dimming switch circuit is connected to the input end of the LED driving module, the output end of the delay circuit is connected to the input end of the LED driving module, and the output end of the LED driving module is connected to the fill light. Among them, the fill light can use a conventional fill light device for a camera, and the LED driving module uses the corresponding driving module for the fill light, which is not limited in this embodiment.

[0034] This embodiment is based on hardware to coordinate the fill light and the video frame rate. Compared with software control, the hardware control method has higher reliability, no software bugs, and lower misjudgment rate of the hardware. On the basis of reliability, lower power consumption can be obtained. In this embodiment, the ISP chip realizes the control of the light intensity (dimming), and the hardware frame synchronization signal and the conditioning switch circuit realize the switching of the fill light. Such a combination realizes the environmental protection fill light operation described in the proposal, and can reduce the power consumption of the fill light by 20% - 30%. Because the circuits described in this proposal are all general circuit scheme designs and there is no great specificity, equivalent replacement of circuits with the same function is supported.

[0035] Embodiment 2

[0036] Based on Embodiment 1, this embodiment provides a camera device with environmental protection supplementary lighting, which includes an image sensor, an ISP chip, and an environmental protection supplementary lighting structure. The image sensor and the ISP chip are selected according to the actual requirements of the camera device. In addition, for the limitations of the environmental protection supplementary lighting structure, refer to Embodiment 1, which will not be elaborated in this embodiment. Based on the environmental protection supplementary lighting structure, this embodiment realizes a camera device with high image quality and low supplementary lighting power consumption, and has good application prospects.

[0037] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0038] The above-described embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the appended claims.

Claims

1. An environmentally friendly fill light structure, applied to a camera device, wherein the camera device has an image sensor and an ISP chip, characterized in that: The environmentally friendly fill light structure includes a switch circuit, a delay circuit, a dimming switch circuit and a fill light unit; The image sensor is connected to the ISP chip and the switch circuit respectively, the image sensor outputs a frame synchronization signal to the switch circuit, the image sensor outputs an image signal to the ISP chip, the input end of the dimming switch circuit is connected to the ISP chip to receive the PWM signal output by the ISP chip, the output end of the dimming switch circuit is connected to the fill light unit, the output end of the switch circuit is connected to the input end of the delay circuit, and the output end of the delay circuit is connected to the fill light unit.

2. The environmentally friendly supplementary light structure according to claim 1, characterized in that: The fill light unit includes an LED driving module and a fill light, the output end of the dimming switch circuit is connected to the input end of the LED driving module, the output end of the delay circuit is connected to the input end of the LED driving module, and the output end of the LED driving module is connected to the fill light.

3. A camera device with environmentally friendly fill light, characterized in that: The camera device with environmentally friendly fill light comprises an image sensor, an ISP chip and an environmentally friendly fill light structure, wherein the environmentally friendly fill light structure comprises a switch circuit, a delay circuit, a dimming switch circuit and a fill light unit; The image sensor is connected to the ISP chip and the switch circuit respectively, the image sensor outputs a frame synchronization signal to the switch circuit, the image sensor outputs an image signal to the ISP chip, the input end of the dimming switch circuit is connected to the ISP chip to receive the PWM signal output by the ISP chip, the output end of the dimming switch circuit is connected to the fill light unit, the output end of the switch circuit is connected to the input end of the delay circuit, and the output end of the delay circuit is connected to the fill light unit.

4. The camera device with environmentally friendly fill light according to claim 3, characterized in that: The fill light unit includes an LED driving module and a fill light, the output end of the dimming switch circuit is connected to the input end of the LED driving module, the output end of the delay circuit is connected to the input end of the LED driving module, and the output end of the LED driving module is connected to the fill light.

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