Abstract: A package structure includes a first die and a second die embedded in a first molding material, a first redistribution structure over the first die and the second die, a second molding material over portions of the first die and the second die, wherein the second molding material is disposed between a first portion of the first redistribution structure and a second portion of the first redistribution structure, a first via extending through the second molding material, wherein the first via is electrically connected to the first die, a second via extending through the second molding material, wherein the second via is electrically connected to the second die and a silicon bridge electrically coupled to the first via and the second via.

Abstract: An electrothermal module includes a first conductive layer, a second conductive layer, and a heat generating layer. The first conductive layer and the second conductive layer respectively include silver metal. The heat generating layer has a first portion, the first portion is disposed between the first conductive layer and the second conductive layer to form an electrothermal conversion portion of the electrothermal module, and the heat generating layer includes a conductive carbon material.

Abstract: A method of reducing gray energy consumption and achieving optimal gray energy saving for carbon neutralization is proposed. In a cellular network, each cell or BS (group of cells) has renewable (green) and non-renewable (gray, on-grid power) energy sources. The renewable (green) energy is highly variable and unpredictable, while non-renewable (gray, on-grid power) is stable but is not renewable and thus has more carbon impact. Each cell or BS (group of cells) services is associated UEs when it is on. In one novel aspect, a cell or BS (group of cells) that consumes more non-renewable energy can give some or all of its served UEs to another cell or BS (group of cells) that consumes less non-renewable energy.

Abstract: A method includes bonding a first package component over a second package component. The second package component includes a plurality of dielectric layers, and a plurality of redistribution lines in the plurality of dielectric layers. The method further includes dispensing a stress absorber on the second package component, curing the stress absorber, and forming an encapsulant on the second package component and the stress absorber.

Abstract: A three-axis voice coil motor including a base, a spherical bearing, a magnetic component, an X-coil group, a Y-coil group, and at least one Z-coil group is provided. The base has a supporting pole. The spherical bearing is rotatably sleeved around the supporting pole. The magnetic component is securely sleeved around the spherical bearing and the magnetic component rotates along with the spherical bearing. The X-coil group is disposed around the magnetic component along an X-axial direction passing through the spherical bearing, and the X-coil group has first gaps. The Y-coil group is disposed around the magnetic component along a Y-axial direction passing through the spherical bearing, and the Y-coil group has second gaps. The Z-coil group is disposed around the magnetic component along a Z-axial direction passing through the spherical bearing.

Abstract: An semiconductor package includes a redistribution structure, a first semiconductor device, a second semiconductor device, an underfill layer and an encapsulant. The first semiconductor device is disposed on and electrically connected with the redistribution structure, wherein the first semiconductor device has a first bottom surface, a first top surface and a first side surface connecting with the first bottom surface and the first top surface, the first side surface comprises a first sub-surface and a second sub-surface connected with each other, the first sub-surface is connected with the first bottom surface, and a first obtuse angle is between the first sub-surface and the second sub-surface.

Abstract: A method of adaptively controlling a brushless DC motor includes steps of: controlling the brushless DC motor rotating at a first speed according to an operation curve, accumulating a running time of the brushless DC motor, estimating a remaining used time of a bearing of the brushless DC motor according to the accumulated running time, executing an alarm operation when the remaining used time is less than a predetermined time, and decreasing the speed of the brushless DC motor to run at a second speed to prolong the used time of the bearing.

Abstract: A heat dissipation apparatus with energy-saving effect is coupled to an operation unit, and the heat dissipation apparatus includes a control unit and a drive circuit. The control unit determines whether the operation unit enters an energy-saving mode according to a first signal provided by the operation unit. The control unit shields a plurality of second signals provided to the drive circuit according to the energy-saving mode. The drive circuit does not drive the heat dissipation unit and the heat dissipation unit enters an inertia deceleration.

Abstract: A fan management system includes a fan and a server. The fan includes a driving circuit, and the driving circuit is configured for driving the fan. The fan operates in an operation mode. The server is connected to the fan and is configured for controlling the operation of the fan. The driving circuit outputs a digital label signal when the fan operates abnormally, and the server obtains a production history, an operation information and a warning message of the fan through the digital label signal. The server adjusts the operation mode of the fan according to the warning message simultaneously.

Abstract: A method of estimating used time of a brushless DC motor is provided. The method includes steps of: calculating a running time of the brushless DC motor when the brushless DC motor is in a normal operation state, recording the running time when the brushless DC motor is in an abnormal operation state, updating an accumulated running time, estimating a used time of a bearing of the brushless DC motor according to the accumulated running time, and determining a life span of the bearing according to the used time of the bearing.

Abstract: A heat dissipation apparatus with energy-saving effect is coupled to an operation unit, and the heat dissipation apparatus includes a control unit and a drive circuit. The control unit determines whether the operation unit enters an energy-saving mode according to a first signal provided by the operation unit. The control unit shields a plurality of second signals provided to the drive circuit according to the energy-saving mode. The drive circuit does not drive the heat dissipation unit and the heat dissipation unit enters an inertia deceleration.

Abstract: A brushless DC motor with automatic record of abnormal operation includes an integrated circuit chip electrically connected to a drive circuit of the brushless DC motor. The integrated circuit chip includes a central processing unit, and a flash memory and a detection unit connected to the central processing unit. When the detection unit receives a detection signal from the drive circuit and the central processing unit determines that the brushless DC motor is in an abnormal operation state, the central processing unit generates an abnormal operation data including an error code so that the flash memory automatically stores the abnormal operation data. The present disclosure further includes a method of automatically recording abnormality for the brushless DC motor.

Abstract: A motor drive circuit including a back electromotive force detecting module and a processing module is disclosed herein. The back electromotive force detecting module is electrically connected to a single phase DC motor and is configured to detect a back electromotive force of the single phase DC motor and to output a detecting signal correspondingly. The processing module is electrically connected to the back electromotive force detecting module and the single phase DC motor. The processing module is configured to determine the rotation direction of the single phase DC motor according to the detecting signal and a hall signal outputted by a hall element located in the single phase DC motor, and is configured to control the single phase DC motor.

Abstract: A single phase brushless DC motor comprises a Hall effect sensor, a coil assembly and a motor control circuit which generating a driving signal to guide a coil current flowing through the coil assembly. The Hall effect sensor senses the magnetic pole of the rotor to accordingly generate a Hall effect signal. The motor control circuit outputs a current polarity reverse signal according to the voltage at one end of the coil assembly. The time when the current polarity reverse signal is generated corresponds to the polarity reverse time of the coil current. The motor control circuit adjusts the phase of the driving signal according to the polarity reverse time of the Hall effect signal and the time when the current polarity reverse signal is generated to synchronize the phase of the back emf of the single phase brushless DC motor with the phase of the coil current.

Abstract: A single phase brushless DC motor comprises a Hall effect sensor, a coil assembly and a motor control circuit which generating a driving signal to guide a coil current flowing through the coil assembly. The Hall effect sensor senses the magnetic pole of the rotor to accordingly generate a Hall effect signal. The motor control circuit outputs a current polarity reverse signal according to the voltage at one end of the coil assembly. The time when the current polarity reverse signal is generated corresponds to the polarity reverse time of the coil current. The motor control circuit adjusts the phase of the driving signal according to the polarity reverse time of the Hall effect signal and the time when the current polarity reverse signal is generated to synchronize the phase of the back emf of the single phase brushless DC motor with the phase of the coil current.

Abstract: A driving circuit drives a motor containing a first coil and a second coil. The driving circuit includes a switching unit, an operation unit and a control unit. The switching unit receives a switching signal from the control unit for driving the motor. The control unit detects the rotation speed of the motor. When the rotation speed of the motor is greater than a predetermined rotation speed, the control unit outputs a first operation signal to the operation unit to couple the first terminals of the first and second coils and couple the second terminals of the first and second coils. When the rotation speed of the motor is less than or equal to the predetermined rotational speed, the control unit outputs a second operation signal to the operation unit to couple the second terminal of the first coil to the first terminal of the second coil.

Abstract: A motor drive circuit including a back electromotive force detecting module and a processing module is disclosed herein. The back electromotive force detecting module is electrically connected to a single phase DC motor and is configured to detect a back electromotive force of the single phase DC motor and to output a detecting signal correspondingly. The processing module is electrically connected to the back electromotive force detecting module and the single phase DC motor. The processing module is configured to determine the rotation direction of the single phase DC motor according to the detecting signal and a hall signal outputted by a hall element located in the single phase DC motor, and is configured to control the single phase DC motor.

Abstract: A driving circuit drives a motor containing a first coil and a second coil. The driving circuit includes a switching unit, an operation unit and a control unit. The switching unit receives a switching signal from the control unit for driving the motor. The control unit detects the rotation speed of the motor. When the rotation speed of the motor is greater than a predetermined rotation speed, the control unit outputs a first operation signal to the operation unit to couple the first terminals of the first and second coils and couple the second terminals of the first and second coils. When the rotation speed of the motor is less than or equal to the predetermined rotational speed, the control unit outputs a second operation signal to the operation unit to couple the second terminal of the first coil to the first terminal of the second coil.

Abstract: A motor control apparatus includes a phase sensing circuit, a current sensing circuit, a controller and a driving circuit. The driving circuit receives a first driving signal and then controls a phase switching state of the magnetic pole of the motor so as to drive the motor in accordance with the first driving signal. The phase sensing circuit detects the phase switching state of the magnetic pole to generate and output a phase switching signal to the controller during the motor is operating. The current sensing circuit detects a current flowing through the motor to generate and output a current phase signal to the controller. The controller compares a phase difference between the phase switching signal and the current phase signal to generate and output a second driving signal to the driving circuit. The driving circuit controls the phase switching state of the magnetic pole for driving the motor in accordance with the second driving signal.

Abstract: A fan rotary speed controlling device includes a first signal generating circuit, a second signal generating circuit, a pulse width modulation (PWM) circuit and a switching circuit. The first signal generating circuit receives a real frequency signal and a target frequency signal, and generates a first signal according to the real frequency signal and the target frequency signal. The second signal generating circuit generates a second signal according to the first signal. The PWM circuit generates a PWM signal according to the second signal. The switching circuit is electrically connected with the PWM circuit and outputs a control signal to control the rotary speed of the motor. Hence, the fan rotary speed controlling device boosts the accuracy and the stability of the fan rotary speed.