Abstract: A fog-proof device for evaporating fog from a camera's lens includes a glass covering a front surface of the lens, and a light-shielding cylinder mounted to the glass. The light-shielding cylinder defines a through hole. A zigzagging heat-generating portion is formed along a circumference of the light-shielding cylinder, and two ends of the heat-generating portion are separated by a gap. Ends of the heat-generating portion at opposite sides of the gap are electrically connected to two power wires.

Abstract: A lighting device of a camera includes a light board and a dome-shaped cover receiving the light board. The light board defines a first through hole in a center. A number of infrared lamps are slantingly mounted on a side of the light board and around the first through hole. The cover defines a second through hole aligning with the first through hole, and a number of lamp holes around the second through hole. The infrared lamps are extended through the lamp holes.

Abstract: A light shielding device for a camera includes a light board and a light shielding member. The light board defines a first through hole in a center. A number of infrared lamps mounted on a side of the light board and around the through hole. The shielding member is mounted to the light board and includes a main body positioned between the infrared lamps and the through hole.

Abstract: A camera module includes a main body, a lens module, and a connecting member mounted between the main body and the lens module. The lens module includes a cable connected to the main body. The connecting member includes a cable position structure for positioning the cable.

Abstract: A camera includes a cover, an outer frame rotatably connected to the cover about a first axis, a mounting bracket rotatably connected to the outer frame about a second axis perpendicular to the first axis, and a lens module rotatably connected to the mounting bracket about a third axis coaxial with the first axis.

Abstract: A network connection method applied between at least one network camera and at least one network storage device is provided. The network connection method includes steps of controlling the at least one network storage device to send inviter information in response to a first instruction, controlling the network camera to receive the inviter information in response to a second instruction, controlling the network camera to send reply information based on the received inviter information, controlling the network storage device to receive the reply information, and connecting the network camera to the network storage device based on the reply information. A related network connection system and a storage medium are also provided.

Abstract: A brightness-adjusting method is provided. The method includes the following steps: divide the first image into a plurality of sub-images; acquire an average brightness value of each sub-image; detect whether or not the average brightness value of each sub-image falls within a predetermined brightness value range; determine the driving controller associated with the light-emitting unit associated with the sub-image that has an average brightness value that does not fall within the predetermined brightness value range; control the determined driving controller to adjust current flowing to the light-emitting unit to adjust the illumination value of the light-emitting unit; and control the lens module to capture a second image of the object after the driving controller has adjusted the current flowing to the light-emitting unit. A brightness-adjusting system and an electronic device using the same are also provided.

Abstract: A control circuit for a USB connector includes a first electronic switch. Before a universal serial bus (USB) device is plugged into the USB connector, a ground pin of the USB connector is idle. A control terminal of the first electronic switch receives a high level signal and first and second terminals of the first electronic switch are disconnected. When the USB device is plugged into the USB connector, the ground pin of the USB connector is grounded. The control terminal of the first electronic switch then receives a low level signal and the first and second terminals of the first electronic switch are connected. A power supply connected to the first terminal of the first electronic switch supplies power to the power pin of the USB connector through the first electronic switch.

Abstract: An indication circuit includes a network port, a detecting microchip, a first NOT AND (NAND) gate, a second NAND gate, a NOT gate, a first AND gate, and a second AND gate. The network port receives a network connector of a network cable therein, and includes a first light-emitting diode (LED) L1 and a second LED L2. The detecting microchip is electronically connected to the network port to detect a LAN speed, and accordingly output a group of logic control signal. The first NAND gate, the NOT gate, and the first AND gate are electronically connected between the first NAND gate and an anode of the first LED and a cathode of the second LED. The second NAND gate and the second AND gate are electronically connected between the first NAND gate and a cathode of the first LED and an anode of the second LED.

Abstract: A focusing method for a camera by adjusting the focal length from a minimum focal length to a maximum focal length. Obtaining a number of first image definitions for analysis and comparing the first definitions to obtain a greatest definition in the first definitions. When the camera is adjusted for obtaining a second definition, obtaining a number of second image definitions for analysis. Comparing the second definition with the greatest definition and outputting a first informing signal if the second definition is less than the greatest definition. Informing the user that the camera needs to be adjusted and outputting a second informing signal when the second definition is equal to the greatest definition and informing the user that further adjustment is not required.

Abstract: An illumination device obtaining an internet protocol (IP) address from a dynamic host configuration protocol (DHCP) server includes a first sensor, an illumination unit, a processor, and a registered jack 45 (RJ-45) interface. The first sensor is configured to output a first detecting signal with respect to an ambient luminance. The illumination unit includes a lighting module and a driving module capable of controlling operation status of the lighting module. The processor is configured to output a control signal to the driving module according to the first detecting signal. The RJ-45 interface enables the illumination device to be coupled to a client over a network. The client is utilized to monitor the illumination device remotely.

Abstract: In a network video recorder (NVR), a starting location and an end location of video data in a file are set. One frame of video data is recorded in one element of a storage buffer and the element has an index. The NVR further sets a starting location and an end location that coincides with the index of a frame of video data in the storage buffer. If the NVR receives a frame and not enough space of the storage buffer, the NVR adjusts the starting location of the storage buffer by one element, and adjusts the starting location of the file to the starting location of the frame in the storage buffer. If enough space is and the frame is the Intra-frame, the NVR adjusts the end location of the file by one frame, and adjusts the end location of the storage buffer by one element.