Abstract: A projection system and a control method are provided. The projection system includes an image control device and a projector. The image control device stores an application and includes a first communication port. The image control device is configured to execute the application to generate a control signal. The first communication port includes at least one of a teletype serial (TTYS) interface and a universal serial bus (USB) interface. The image control device is configured to transmit the control signal to a second communication port of the projector through the first communication port, so that the projector executes a function corresponding to the control signal.

Abstract: An electronic system and a control method thereof are provided. The electronic system includes a projection device and at least one peripheral device. The control method of the electronic system includes: sending an original instruction to a natural language model through the projection device, wherein the projection device has a communication interface and is communicatively connected to the at least one peripheral device through the communication interface; in response to the original instruction corresponding to an operation of the at least one peripheral device, generating at least one standard instruction according to the original instruction through the natural language model; and controlling the at least one peripheral device through the projection device to perform the operation corresponding to the original instruction according to the at least one standard instruction.

Abstract: A method is provided for an electrically-driven tool to detect battery decline. The electrically-driven tool includes a battery, a controller and a kinetic device. The controller pre-stores a dataset of energy provision time including a data piece of energy provision time that signifies a predetermined time length presumed to be required by the battery to provide a predetermined amount of electric energy. The controller induces provision of the predetermined amount of electric energy to the kinetic device to have the kinetic device perform a predetermined stroke with a predetermined load, times a stroke time period taken by the predetermined stroke, and determines whether the stroke time period is greater than the predetermined time length. The controller outputs a battery abnormality signal when the stroke time period is greater than the predetermined time length.

Abstract: A method and a projection system for calibrating a projection area of a projector are provided. The method includes the following. A calibration pattern is projected to form a projection area, and includes a first original mark group and a second original mark group. A captured image including the projection area is obtained. Whether the captured image includes a closed area formed by a complete line is determined. A first calibration operation is performed when the captured image does not include the closed area. A second calibration operation is performed when the projection area in the captured image includes the complete closed area. The projection area is calibrated according to a first mark group or a second mark group in the captured image during the first calibration operation. The projection area is calibrated according to the second mark group in the captured image during the second calibration operation.

Abstract: A projection device, including a projection module, a projection lens, a distance sensor, a focus adjustment module, and a control unit, is provided. The projection module is configured to generate an image beam. The projection lens is disposed on a transmission path of the image beam. The focus adjustment module is connected to the projection lens. The control unit is configured to enable the projection device to enter a focus mode; enable the projection module to project the image beam to a projection surface; enable the distance sensor to sense a projection distance; calculate a focus adjustment parameter by using an auto focus transfer function according to the projection distance; and control the focus adjustment module to adjust a focal length of the projection lens according to the focus adjustment parameter. An auto focus method is also provided.

Abstract: A projection system includes a projection device, a light sensor, a control unit, and an arithmetic unit. The projection device is configured to project an image beam toward a projection surface. The light sensor is configured to sense at least one of a background beam and the image beam reflected by the projection surface and obtaining chromaticity information. The control unit is electrically connected to the projection device, and configured to control the image beam projected by the projection device. The arithmetic unit is electrically connected to the control unit and the light sensor. The arithmetic unit is configured to generate an adjustment signal according to the chromaticity information. The control unit is configured to adjust a color temperature, a brightness, and a color gamut of the image beam according to the adjustment signal. A calibration method of the projection system is also proposed.

Abstract: An electric power tool includes a power supply supplying electricity, a driving unit driving operation of the electric power tool, an operation unit to be operated by a user, main and redundant sensing units detecting the power supply, the driving unit and the operation unit, and a control unit including primary and secondary controllers that respectively make first and second determinations according to the detection made by the main and redundant sensing units. The control unit controls the driving unit to operate in a normal mode when both of the first and second determinations indicate that at least one of the power supply, the driving unit and the operation unit operates normally.

Abstract: A method is provided for an electrically-driven tool to detect battery decline. The electrically-driven tool includes a battery, a controller and a kinetic device. The controller pre-stores a dataset of energy provision time including a data piece of energy provision time that signifies a predetermined time length presumed to be required by the battery to provide a predetermined amount of electric energy. The controller induces provision of the predetermined amount of electric energy to the kinetic device to have the kinetic device perform a predetermined stroke with a predetermined load, times a stroke time period taken by the predetermined stroke, and determines whether the stroke time period is greater than the predetermined time length. The controller outputs a battery abnormality signal when the stroke time period is greater than the predetermined time length.

Abstract: An electric power tool includes a battery, a first switch connected to the battery, a driving unit, a sensing unit, a primary controller and a secondary controller. The driving unit includes a motor, a second switch connected to the motor and the first switch, and a switch-control circuit connected to the second switch. The sensing unit outputs a detection result to the primary and secondary controllers. The primary controller disables the driving unit when it is determined that there is a malfunction based on the detection result. The secondary controller controls the first switch to operate in a non-conducting state to cut off electricity supplied from the battery to the second switch when it is determined that there is a malfunction based on the detection result. When the first switch operates in a conducting state, the second switch provides the electricity to the motor under control of the switch-control circuit.

Abstract: A method of controlling a rotational speed of an electric tool is provided. The electric tool includes a battery, a battery voltage detection circuit, a motor unit, and a controller. The controller stores at least one regression equation of duty ratio on voltage, and detects a voltage of the battery through the battery voltage detection circuit. The controller obtains a duty ratio for a control signal by substituting the voltage of the battery into the at least one regression equation, and outputs the control signal with the duty ratio obtained from the at least one regression equation to the motor unit for controlling operation of the motor unit.

Abstract: A method and a projection system for calibrating a projection area of a projector are provided. The method includes the following. A calibration pattern is projected to form a projection area, and includes a first original mark group and a second original mark group. A captured image including the projection area is obtained. Whether the captured image includes a closed area formed by a complete line is determined. A first calibration operation is performed when the captured image does not include the closed area. A second calibration operation is performed when the projection area in the captured image includes the complete closed area. The projection area is calibrated according to a first mark group or a second mark group in the captured image during the first calibration operation. The projection area is calibrated according to the second mark group in the captured image during the second calibration operation.

Abstract: A projection system and a control method are provided. The control method includes the following. A projected image is projected on a projection area by a projection device. The projected image is captured in a detection area to generate a captured image by an image capturing device. The detection area includes the projection area. The captured image is received, a virtual frame is generated around the projection area in the captured image, and pixel values of the virtual frame are analyzed to determine whether an object enters the projection area by a processing device. The projection device is controlled to perform a protection operation by the processing device in response to determining that the object enters the projection area.

Abstract: A method of controlling firing mode for an electric nail gun is provided. The electric nail gun includes a control module that, when operating in a program selecting state in an intelligent firing mode, executes a single firing program or a continuous firing program based on which of a safety switch and a trigger switch of the electric nail gun is being activated . When executing the continuous firing program, the control module forbids execution of a nail firing action when determining that the electric nail gun has not been fired for longer than a predetermined time period.

Abstract: A focus adjustment method, adapted for a projection system is provided. The projection system includes a projection target and a projection device having a range-finding array element and a processor. A plurality of range-finding elements in the range-finding array element define a plurality of measurement mesh points. The focus adjustment method includes the following. A plurality of ranging regions in the measurement mesh points are defined, and each ranging region includes more than one measurement mesh point. All the range-finding elements in the ranging regions perform a ranging measurement to generate a plurality of original ranging values. An averaging calculation is performed on the original ranging values corresponding to each ranging region to generate a plurality of average region ranging values. Whether the average region ranging values are within a preset range is determined to generate an optimal ranging value which is used to adjust a lens focus.

Abstract: The present invention relates to a method for producing a carbon nanotube fiber aggregate and provides a carbon nanotube fiber aggregate having an improved level of alignment through ultrasonic wave application and low speed recovery.

Abstract: A body weather strip for a vehicle includes a carrier part coupled by being fitted in a car body panel and a tube part integrally formed with the carrier part and configured to perform a function when coming in contact with a door panel. A conductive coating agent is applied to the tube part and an external power is connected to the conductive coating agent.

Abstract: A body weather strip for a vehicle includes a carrier part coupled by being fitted in a car body panel and a tube part integrally formed with the carrier part and configured to perform a function when coming in contact with a door panel. A conductive coating agent is applied to the tube part and an external power is connected to the conductive coating agent.

Abstract: The invention discloses a package structure made of the combination of a device carrier and a modifiable substrate. In one embodiment, a recess is formed in the device carrier and a conductive element is disposed on the substrate, wherein the substrate is disposed on the device carrier and the conductive element is located in the recess of the device carrier. The conductive pattern in the substrate is electrically connected to the device carrier and I/O terminals of the first conductive element. The invention also discloses a method for manufacturing a package structure made of the combination of a device carrier and a modifiable substrate. In one embodiment, a portion of the conductive pattern in the substrate can be modified.

Abstract: The present invention relates to a method for producing a carbon nanotube fiber aggregate and provides a carbon nanotube fiber aggregate having an improved level of alignment through ultrasonic wave application and low speed recovery.

Abstract: A preparation method for 2,3-pentanedione, including the steps of adding one or both of 3-hydroxy-2-pentanone and 2-hydroxy-3-pentanone into water and conducting mixing, and introducing ozone at the temperature of 3-20° C. for a reaction to obtain 2,3-pentanedione. The synthesis process of the present invention uses ozone for oxidizing a mixture containing 3-hydroxy-2-pentanone and 2-hydroxy-3-pentanone, acetic acid is used as a cocatalyst, reaction conditions are mild, the operation process is simple, the product yield is high, and the cost is low.