Abstract: An iris calibration device includes one or more groups of light sources, a microcontroller (MCU), and a display. The MCU connects to a system on chip (SoC) of a digital camera device. The digital camera device includes an iris lens. The MCU receives an “on” command or an “off” command from the SoC. The MCU turns on or turn off a group of light sources according to the “on” command or the “off” command The SoC adjusts the iris lens according to an average luminance of the one or more light sources sensed by a sensor of the digital camera device.

Abstract: A light source driving circuit includes a transformer, a switching circuit, a control circuit, a brightness adjusting circuit and an isolator circuit. The brightness adjusting circuit is connected to a secondary winding assembly of the transformer and the light-emitting element for detecting an output voltage and/or an output current and generating a control signal according to the brightness adjusting signal. The isolator circuit is used for isolating the primary winding assembly of the transformer from the brightness adjusting circuit. The isolator circuit generates a feedback current according to the control signal. According to the feedback current, the switching circuit is controlled by the control circuit. As a status of the brightness adjusting signal is changed, a status of the control signal is changed and a time period of changing the status of the control signal is longer than a time period of changing the status of the brightness adjusting signal.

Abstract: An Internet protocol (IP) camera includes an image capturing unit for capturing images, a distant monitoring unit for receiving the captured images as digital signals through a communication network, and a near monitoring unit receiving captured images as analog signals through a coder/encoder (CODEC) unit. The near monitoring unit is positioned near the image capturing unit, and the IP camera is operated according to the images displayed by the near monitoring unit to adjust visual monitoring parameters thereof, thereby adjusting the IP camera to a desired monitor status.

Abstract: A temperature control circuit includes a microprocessor, a protection module, a temperature detecting module, and a heating module. The temperature detecting module includes a thermistor and a first switch. The thermistor is operable to sense a temperature to turn on or off the first switch for outputting a detection signal to the microprocessor and the protection module. The protection module is operable to control the microprocessor to work or reset according to the detection signal. The heating module includes a heater and a second switch. The microprocessor controls the second switch to turn on or off for making the heater work or stop working according to the detection signal.

Abstract: A projector includes a body, an input unit for receiving images, a reference image storage unit for storing a reference image, a micro controller unit (MCU), a graphic processing unit (GPU), an optical unit, and a sensing unit. The reference image is processed by the MCU and the GPU, and then projected on a screen to form a projection image by the optical unit. The sensing unit is mounted on a front surface of the body to sense the projection image and transmit data of the projection image to the MCU. The MCU compares the reference image and the projection image to obtain a correction value. The GPU adjusts its calculations according to the correction value.

Abstract: An adjusting system for a projector includes a reference point projection unit, an infrared apparatus, a micro controller unit (MCU), and a graphic processing unit (GPU). The reference point projection unit stores reference points. The reference points are projected on a screen to form projection points. The infrared apparatus includes infrared devices mounted on a front surface of a body of the projector. The infrared devices emit infrared signals to the screen and form light points on the screen. When a projection angle of the projector is 0 degrees, the light points overlap the projection points respectively. When the projection angle of the projector is a certain angle, the MCU controls the GPU to make adjustment corresponding to the infrared devices which receive the reflected infrared signals, until the projection points overlap the light points respectively.

Abstract: A projector includes a body, a support shaft, an input unit, a distance detection unit mounted on a front surface of the body, an angle detection unit mounted in the support shaft, a micro controller unit, a graphics processing unit (GPU), and an optical unit. The distance detection unit detects a distance between the distance detection unit and a light point on a screen by the distance detection unit. The angle detection unit detects a projection angle of the body. The MCU obtains a correction value according to the distance between the distance detection unit and the light point on the screen, and the projection angle of the body. The GPU corrects the images from the input unit according to the correction value. The optical unit projects the corrected images on the screen.

Abstract: An aperture controlling system includes a CMOS image sensor, a brightness encoder, an aperture and an aperture driving circuit. The brightness encoder is used for extracting brightness information sensed by the CMOS image sensor and converting the brightness information into digital codes. The aperture driving circuit includes a D/A converter, a motor coil driving circuit, an environment sensing module, a benchmark voltage generator and a motor. The motor is mechanically connected to the aperture. The motor coil driving circuit includes a voltage comparator. The input and the output of the D/A converter are respectively coupled to the brightness encoder and the inverting input of the voltage comparator. The input and the output of the benchmark voltage generator are respectively coupled to the environment sensing module and the non-inverting input of the voltage comparator. The output of voltage comparator is connected to the motor.

Abstract: An airflow speed detection device for measuring an airflow speed includes an airflow speed switch, and a connector. The airflow speed switch includes a detection head, and an elastic piece. The connector is electrically connected to the testing the airflow speed switch to connect an indicator to indicate close and open states of the airflow speed switch. If the airflow speed is not faster than a critical value, the elastic piece contacts the detection head to close the airflow speed switch. If the airflow speed is faster than the critical value, the elastic piece is blown away from the detection head to open the airflow speed switch.

Abstract: An adjustable connecting mechanism for a camera device includes a frame, a tubular fixing member and a locking screw The frame forms a mounting portion; the mounting portion defines a through hole. The fixing member defines a first engaging portion and a second engaging portion spaced a predetermined distance from the first engaging portion along an axis of the fixing member. The locking screw is able to pass through the through hole and selectively engage in the first engaging portion or the second engaging portion, to adjust a height of the fixing member relative to the frame.

Abstract: An Internet Protocol (IP) camera management system and method determines a MAC address of an IP camera corresponding to a communication channel, searches an IP address of the IP camera through the determined MAC address of the IP camera, then establishes connection between the IP camera management system and the IP camera through the searched IP address. Furthermore, video image data are acquired from the IP camera through the communication channel and are displayed on a display interface.

Abstract: A camera device includes a lens cover defining a lens opening. Two positioning posts extend from the lens cover. The two positioning posts are arranged at two opposite sides of the lens opening, for selectively mounting a first circuit board having a first lens or a second circuit board having a second lens different from the first lens. The first and second circuit boards are operable to be installed on the lens cover at different positions through being mounted on different positions of the two positioning posts.

Abstract: A sampling rate adjustment system includes a detecting circuit and a processor. The detecting circuit detects a frequency of an alternating current (AC) power source and outputs a detecting signal. The processor receives the detecting signal of the detecting circuit and determines whether a difference between the frequency of the AC power source and a sampling rate of a camera is less than a predetermined value. The processor outputs a control signal to the camera and changes the sampling rate of the camera when the difference between the frequency of the AC power source and the sampling rate of the camera is less than the predetermined value.

Abstract: A system includes a master device and a number of slave devices connected to the master device via a bus. Each slave device includes a control unit, a switch unit, and a lock unit. When a new slave device is connected to the system, the control unit of the new slave device transmits a request signal to the master device. The master device detects whether the master device is communicating with the already connected slave devices after receiving the request signal, and outputs an enable signal to the new slave device according to the detected result. The control unit of the new slave device controls the lock unit of the new slave device to turn on and turn off the switch unit of the new slave device according to the enable signal.

Abstract: A power supply for supplying power to a lamp with functions of dimming, over-current protection, over-voltage protection, arcing protection, and low-temperature start-up is provided. When frequency of the output current exceeds a predetermined value, the power supply is turned off to accomplish a dimming goal and extend lifetime of the lamp. When abnormal statuses such as open-circuited status, short-circuited status, or arcing status occur, a surge current induced by the abnormal statuses may be eliminated to prevent the power supply from being damaged. A high-frequency current detection circuit is configured to detect whether a current supplied to the high-voltage load is a high-frequency current to prevent damage to the electronic elements in the high-voltage load. A current adjusting circuit is configured to adjust an alternating current outputted to a lamp set in response to an environment temperature to supply an adequate alternating current at a low temperature for starting the lamp set.

Abstract: A chip adapter used to install a chip on a first chip arranging area of a circuit board includes a board. The size of the board has the same size as the first chip arranging area of the circuit board. Edges of the chip adapter define a number of gaps corresponding to first pads of the circuit board. A second chip arranging area of the same size as the chip is arranged in a center of the chip adapter. A number of second pads are arranged around the second chip arranging area of the chip adapter corresponding to pins of the chip. Each second pad is electrically connected to a sidewall of the corresponding gap of the chip adapter.

Abstract: A digital camera includes a bezel and an extending ring. The bezel defines a circular-shaped recess, and N pairs of support arms are positioned on the inner sidewall of the recess. The N is an integer equaling or exceeding 2. Each of the pairs of support arms has different height and the two support arms in each of the pairs of support arms are symmetrically placed with respect to a central axis of the recess. The extending ring defines N?1 pairs of bar-shaped slots. An end of the extending ring contacts an end surface of one of the N pairs of support arms, and the N?1 pairs of bar-shaped slots are positioned corresponding to the other N?1 of the N pairs of support arms.

Abstract: A digital camera includes a bezel and an extending ring. The bezel includes a convex ring and at least one fixing portion. The convex ring is positioned on a center of the bezel. The fixing portion is defined on an outer sidewall of the convex ring. The extending ring includes a sleeve, a flange, and at least one fastening portion. The sleeve is placed around the outer sidewall of the convex ring. The flange extends from an end of the sleeve and abuts the convex ring. The fastening portion cooperates with the fixing portion.

Abstract: A master/slave device system includes a baseboard, a master device connected to the baseboard, and at least one slave device communicatively connected to the master device. The baseboard provides a power source. A switch connects the power source and the at least one slave device. The switch is capable of being switched on when a predetermined time is reached. The at least one slave device is capable of automatically setting an address at the moment the switch is switched on. The master device is capable of identifying the at least one slave device using the address.

Abstract: A projector includes an image signal interface, a micro control unit (MCU), an image output lens, a graphic processing unit (GPU), an image input lens, and an image sensor. The MCU receives image signals through the image signal interface and sets the image signals to a default image parameter configuration. The GPU processes the set image signals to project the set image signals in a configuration of an image on a certain place through the image output lens. The image input lens captures the projected image on an appropriate place. The MCU receives actual image data corresponding to the captured projected image through the image sensor. The MCU compares the actual image data with predetermined image data, and adjusts image parameters of the image signals until a difference between the actual image data and the predetermined data is equal to or less than a predetermined value.