Abstract: A wireless receiving device includes a wake-up receiver, a main receiver and a calibration circuit. The wake-up receiver operates in a monitoring mode or a sleep mode. When operating in the monitoring mode, the wake-up receiver monitors whether a request signal is transmitted by a communication device and issues a wake-up signal after receiving the request signal. The main receiver operates in a sleep mode or a transmission mode. When operating in the sleep mode, the main receiver is woken up and enters the transmission mode to transmit and receive data to and from the communication device when receiving the wake-up signal. The calibration circuit is coupled to the wake-up receiver and the main receiver and configured to receive a calibration signal from the main receiver and calibrate a reception frequency of the wake-up receiver in the background in response to the calibration signal.

Abstract: A wireless receiving device includes a wake-up receiver, a main receiver and a calibration circuit. The wake-up receiver operates in a monitoring mode or a sleep mode. When operating in the monitoring mode, the wake-up receiver monitors whether a request signal is transmitted by a communication device and issues a wake-up signal after receiving the request signal. The main receiver operates in a sleep mode or a transmission mode. When operating in the sleep mode, the main receiver is woken up and enters the transmission mode to transmit and receive data to and from the communication device when receiving the wake-up signal. The calibration circuit is coupled to the wake-up receiver and the main receiver and configured to receive a calibration signal from the main receiver and calibrate a reception frequency of the wake-up receiver in the background in response to the calibration signal.

Abstract: A camera using an automatically depth-of-field adjusting method includes a camera lens, a diaphragm, a light-sensing part, and a controller. The light-sensing part can receive visible light of a first wave band and invisible light of a second wave band. The controller performs an adjusting procedure, according to which the controller measures a first light intensity of ambient light of a scene relative to the first wave band and a second light intensity of the ambient light relative to the second wave band, and when the controller determines that a ratio of a difference between the first intensity and the second intensity to a sum of the first intensity and the second intensity is less than a predetermined value, controls the diaphragm to adjust an aperture of the diaphragm according to a current focal length of the camera lens.

Abstract: A camera includes an image-capturing part, a plurality of lamp cups, and a plurality of lighting parts disposed in the lamp cups correspondingly. The lamp cup includes two reflection members oppositely disposed. One of the reflection members thereon defines a light source position and has a first reflecting surface. The other reflection member has a second reflecting surface toward the light source position, and a third reflecting surface, close to the second reflecting surface and toward the first reflecting surface. The first reflecting surface and the third reflecting surface form a light-out opening therebetween. Some light travels from the light source position to be reflected by the second reflecting surface and the first reflecting surface in order to emit out of the light-out opening. Some light travels from the light source position to be reflected by the third reflecting surface to emit out of the light-out opening.

Abstract: A camera includes an image-capturing part, a plurality of lamp cups, and a plurality of lighting parts disposed in the lamp cups correspondingly. The lamp cup includes two reflection members oppositely disposed. One of the reflection members thereon defines a light source position and has a first reflecting surface. The other reflection member has a second reflecting surface toward the light source position, and a third reflecting surface, close to the second reflecting surface and toward the first reflecting surface. The first reflecting surface and the third reflecting surface form a light-out opening therebetween. Some light travels from the light source position to be reflected by the second reflecting surface and the first reflecting surface in order to emit out of the light-out opening. Some light travels from the light source position to be reflected by the third reflecting surface to emit out of the light-out opening.

Abstract: A camera using an automatically depth-of-field adjusting method includes a camera lens, a diaphragm, a light-sensing part, and a controller. The light-sensing part can receive visible light of a first wave band and invisible light of a second wave band. The controller performs an adjusting procedure, according to which the controller measures a first light intensity of ambient light of a scene relative to the first wave band and a second light intensity of the ambient light relative to the second wave band, and when the controller determines that a ratio of a different between the first intensity and the second intensity to a sum of the first intensity and the second intensity is less than a predetermined value, controls the diaphragm to adjust an aperture of the diaphragm according to a current focal length of the camera lens.

Abstract: An image surveillance device is mounted on a corner wall structure having a first side surface, a second side surface, and a ceiling surface and includes a casing and an image capturing module. The casing includes a containing plate, a cover, and a mounting plate detachably fixed to the first side surface, the second side surface, and the ceiling surface. The containing plate is detachably contained in the mounting plate and has an opening and a containing groove recessed inwardly from the opening. The cover detachably covers the opening and has a first transparent mask. The image capturing module is disposed in the containing groove. An oblique angle is included between an optical axis of the image capturing module and the ceiling surface, so as to make the image capturing module obliquely monitor a surveillance region corresponding to the corner wall structure through the first transparent mask.